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authorLuca Barbato <lu_zero@gentoo.org>2011-11-02 10:10:40 -0700
committerLuca Barbato <lu_zero@gentoo.org>2011-11-24 21:35:47 +0100
commit7f1b427018ecff59e0e14031eecc79aac0d91ec8 (patch)
tree929229709bc8d7f46bd652e2962eca16262fe1d8
parent8b7412fe4e0821ec66eb75da0e586d977b93652c (diff)
downloadffmpeg-7f1b427018ecff59e0e14031eecc79aac0d91ec8.tar.gz
snow: split snow in snowdec and snowenc
The common non inlined code goes in snow.c, the common inlined code in snow.h, tables move in snowdata.h (included only by snow.c)
Diffstat
-rw-r--r--libavcodec/Makefile12
-rw-r--r--libavcodec/snow.c3162
-rw-r--r--libavcodec/snow.h614
-rw-r--r--libavcodec/snowdata.h132
-rw-r--r--libavcodec/snowdec.c546
-rw-r--r--libavcodec/snowenc.c1915
6 files changed, 3268 insertions, 3113 deletions
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index b9ed8db2dc..37aa8ee331 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -341,12 +341,12 @@ OBJS-$(CONFIG_SIPR_DECODER) += sipr.o acelp_pitch_delay.o \
OBJS-$(CONFIG_SMACKAUD_DECODER) += smacker.o
OBJS-$(CONFIG_SMACKER_DECODER) += smacker.o
OBJS-$(CONFIG_SMC_DECODER) += smc.o
-OBJS-$(CONFIG_SNOW_DECODER) += snow.o rangecoder.o
-OBJS-$(CONFIG_SNOW_ENCODER) += snow.o rangecoder.o motion_est.o \
- ratecontrol.o h263.o \
- mpegvideo.o error_resilience.o \
- ituh263enc.o mpegvideo_enc.o \
- mpeg12data.o
+OBJS-$(CONFIG_SNOW_DECODER) += snowdec.o snow.o rangecoder.o
+OBJS-$(CONFIG_SNOW_ENCODER) += snowenc.o snow.o rangecoder.o \
+ motion_est.o ratecontrol.o \
+ h263.o mpegvideo.o \
+ error_resilience.o ituh263enc.o \
+ mpegvideo_enc.o mpeg12data.o
OBJS-$(CONFIG_SOL_DPCM_DECODER) += dpcm.o
OBJS-$(CONFIG_SP5X_DECODER) += sp5xdec.o mjpegdec.o mjpeg.o
OBJS-$(CONFIG_SRT_DECODER) += srtdec.o ass.o
diff --git a/libavcodec/snow.c b/libavcodec/snow.c
index a3af5772c2..a2903583fb 100644
--- a/libavcodec/snow.c
+++ b/libavcodec/snow.c
@@ -25,480 +25,50 @@
#include "dsputil.h"
#include "dwt.h"
#include "snow.h"
+#include "snowdata.h"
#include "rangecoder.h"
#include "mathops.h"
-
-#include "mpegvideo.h"
#include "h263.h"
#undef NDEBUG
#include <assert.h>
-static const int8_t quant3bA[256]={
- 0, 0, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
- 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
-};
-
-static const uint8_t obmc32[1024]={
- 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0,
- 0, 4, 4, 4, 8, 8, 8, 12, 12, 16, 16, 16, 20, 20, 20, 24, 24, 20, 20, 20, 16, 16, 16, 12, 12, 8, 8, 8, 4, 4, 4, 0,
- 0, 4, 8, 8, 12, 12, 16, 20, 20, 24, 28, 28, 32, 32, 36, 40, 40, 36, 32, 32, 28, 28, 24, 20, 20, 16, 12, 12, 8, 8, 4, 0,
- 0, 4, 8, 12, 16, 20, 24, 28, 28, 32, 36, 40, 44, 48, 52, 56, 56, 52, 48, 44, 40, 36, 32, 28, 28, 24, 20, 16, 12, 8, 4, 0,
- 4, 8, 12, 16, 20, 24, 28, 32, 40, 44, 48, 52, 56, 60, 64, 68, 68, 64, 60, 56, 52, 48, 44, 40, 32, 28, 24, 20, 16, 12, 8, 4,
- 4, 8, 12, 20, 24, 32, 36, 40, 48, 52, 56, 64, 68, 76, 80, 84, 84, 80, 76, 68, 64, 56, 52, 48, 40, 36, 32, 24, 20, 12, 8, 4,
- 4, 8, 16, 24, 28, 36, 44, 48, 56, 60, 68, 76, 80, 88, 96,100,100, 96, 88, 80, 76, 68, 60, 56, 48, 44, 36, 28, 24, 16, 8, 4,
- 4, 12, 20, 28, 32, 40, 48, 56, 64, 72, 80, 88, 92,100,108,116,116,108,100, 92, 88, 80, 72, 64, 56, 48, 40, 32, 28, 20, 12, 4,
- 4, 12, 20, 28, 40, 48, 56, 64, 72, 80, 88, 96,108,116,124,132,132,124,116,108, 96, 88, 80, 72, 64, 56, 48, 40, 28, 20, 12, 4,
- 4, 16, 24, 32, 44, 52, 60, 72, 80, 92,100,108,120,128,136,148,148,136,128,120,108,100, 92, 80, 72, 60, 52, 44, 32, 24, 16, 4,
- 4, 16, 28, 36, 48, 56, 68, 80, 88,100,112,120,132,140,152,164,164,152,140,132,120,112,100, 88, 80, 68, 56, 48, 36, 28, 16, 4,
- 4, 16, 28, 40, 52, 64, 76, 88, 96,108,120,132,144,156,168,180,180,168,156,144,132,120,108, 96, 88, 76, 64, 52, 40, 28, 16, 4,
- 8, 20, 32, 44, 56, 68, 80, 92,108,120,132,144,156,168,180,192,192,180,168,156,144,132,120,108, 92, 80, 68, 56, 44, 32, 20, 8,
- 8, 20, 32, 48, 60, 76, 88,100,116,128,140,156,168,184,196,208,208,196,184,168,156,140,128,116,100, 88, 76, 60, 48, 32, 20, 8,
- 8, 20, 36, 52, 64, 80, 96,108,124,136,152,168,180,196,212,224,224,212,196,180,168,152,136,124,108, 96, 80, 64, 52, 36, 20, 8,
- 8, 24, 40, 56, 68, 84,100,116,132,148,164,180,192,208,224,240,240,224,208,192,180,164,148,132,116,100, 84, 68, 56, 40, 24, 8,
- 8, 24, 40, 56, 68, 84,100,116,132,148,164,180,192,208,224,240,240,224,208,192,180,164,148,132,116,100, 84, 68, 56, 40, 24, 8,
- 8, 20, 36, 52, 64, 80, 96,108,124,136,152,168,180,196,212,224,224,212,196,180,168,152,136,124,108, 96, 80, 64, 52, 36, 20, 8,
- 8, 20, 32, 48, 60, 76, 88,100,116,128,140,156,168,184,196,208,208,196,184,168,156,140,128,116,100, 88, 76, 60, 48, 32, 20, 8,
- 8, 20, 32, 44, 56, 68, 80, 92,108,120,132,144,156,168,180,192,192,180,168,156,144,132,120,108, 92, 80, 68, 56, 44, 32, 20, 8,
- 4, 16, 28, 40, 52, 64, 76, 88, 96,108,120,132,144,156,168,180,180,168,156,144,132,120,108, 96, 88, 76, 64, 52, 40, 28, 16, 4,
- 4, 16, 28, 36, 48, 56, 68, 80, 88,100,112,120,132,140,152,164,164,152,140,132,120,112,100, 88, 80, 68, 56, 48, 36, 28, 16, 4,
- 4, 16, 24, 32, 44, 52, 60, 72, 80, 92,100,108,120,128,136,148,148,136,128,120,108,100, 92, 80, 72, 60, 52, 44, 32, 24, 16, 4,
- 4, 12, 20, 28, 40, 48, 56, 64, 72, 80, 88, 96,108,116,124,132,132,124,116,108, 96, 88, 80, 72, 64, 56, 48, 40, 28, 20, 12, 4,
- 4, 12, 20, 28, 32, 40, 48, 56, 64, 72, 80, 88, 92,100,108,116,116,108,100, 92, 88, 80, 72, 64, 56, 48, 40, 32, 28, 20, 12, 4,
- 4, 8, 16, 24, 28, 36, 44, 48, 56, 60, 68, 76, 80, 88, 96,100,100, 96, 88, 80, 76, 68, 60, 56, 48, 44, 36, 28, 24, 16, 8, 4,
- 4, 8, 12, 20, 24, 32, 36, 40, 48, 52, 56, 64, 68, 76, 80, 84, 84, 80, 76, 68, 64, 56, 52, 48, 40, 36, 32, 24, 20, 12, 8, 4,
- 4, 8, 12, 16, 20, 24, 28, 32, 40, 44, 48, 52, 56, 60, 64, 68, 68, 64, 60, 56, 52, 48, 44, 40, 32, 28, 24, 20, 16, 12, 8, 4,
- 0, 4, 8, 12, 16, 20, 24, 28, 28, 32, 36, 40, 44, 48, 52, 56, 56, 52, 48, 44, 40, 36, 32, 28, 28, 24, 20, 16, 12, 8, 4, 0,
- 0, 4, 8, 8, 12, 12, 16, 20, 20, 24, 28, 28, 32, 32, 36, 40, 40, 36, 32, 32, 28, 28, 24, 20, 20, 16, 12, 12, 8, 8, 4, 0,
- 0, 4, 4, 4, 8, 8, 8, 12, 12, 16, 16, 16, 20, 20, 20, 24, 24, 20, 20, 20, 16, 16, 16, 12, 12, 8, 8, 8, 4, 4, 4, 0,
- 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0,
- //error:0.000020
-};
-static const uint8_t obmc16[256]={
- 0, 4, 4, 8, 8, 12, 12, 16, 16, 12, 12, 8, 8, 4, 4, 0,
- 4, 8, 16, 20, 28, 32, 40, 44, 44, 40, 32, 28, 20, 16, 8, 4,
- 4, 16, 24, 36, 44, 56, 64, 76, 76, 64, 56, 44, 36, 24, 16, 4,
- 8, 20, 36, 48, 64, 76, 92,104,104, 92, 76, 64, 48, 36, 20, 8,
- 8, 28, 44, 64, 80,100,116,136,136,116,100, 80, 64, 44, 28, 8,
- 12, 32, 56, 76,100,120,144,164,164,144,120,100, 76, 56, 32, 12,
- 12, 40, 64, 92,116,144,168,196,196,168,144,116, 92, 64, 40, 12,
- 16, 44, 76,104,136,164,196,224,224,196,164,136,104, 76, 44, 16,
- 16, 44, 76,104,136,164,196,224,224,196,164,136,104, 76, 44, 16,
- 12, 40, 64, 92,116,144,168,196,196,168,144,116, 92, 64, 40, 12,
- 12, 32, 56, 76,100,120,144,164,164,144,120,100, 76, 56, 32, 12,
- 8, 28, 44, 64, 80,100,116,136,136,116,100, 80, 64, 44, 28, 8,
- 8, 20, 36, 48, 64, 76, 92,104,104, 92, 76, 64, 48, 36, 20, 8,
- 4, 16, 24, 36, 44, 56, 64, 76, 76, 64, 56, 44, 36, 24, 16, 4,
- 4, 8, 16, 20, 28, 32, 40, 44, 44, 40, 32, 28, 20, 16, 8, 4,
- 0, 4, 4, 8, 8, 12, 12, 16, 16, 12, 12, 8, 8, 4, 4, 0,
-//error:0.000015
-};
-
-//linear *64
-static const uint8_t obmc8[64]={
- 4, 12, 20, 28, 28, 20, 12, 4,
- 12, 36, 60, 84, 84, 60, 36, 12,
- 20, 60,100,140,140,100, 60, 20,
- 28, 84,140,196,196,140, 84, 28,
- 28, 84,140,196,196,140, 84, 28,
- 20, 60,100,140,140,100, 60, 20,
- 12, 36, 60, 84, 84, 60, 36, 12,
- 4, 12, 20, 28, 28, 20, 12, 4,
-//error:0.000000
-};
-
-//linear *64
-static const uint8_t obmc4[16]={
- 16, 48, 48, 16,
- 48,144,144, 48,
- 48,144,144, 48,
- 16, 48, 48, 16,
-//error:0.000000
-};
-
-static const uint8_t * const obmc_tab[4]={
- obmc32, obmc16, obmc8, obmc4
-};
-
-static int scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES];
-
-typedef struct BlockNode{
- int16_t mx;
- int16_t my;
- uint8_t ref;
- uint8_t color[3];
- uint8_t type;
-//#define TYPE_SPLIT 1
-#define BLOCK_INTRA 1
-#define BLOCK_OPT 2
-//#define TYPE_NOCOLOR 4
- uint8_t level; //FIXME merge into type?
-}BlockNode;
-
-static const BlockNode null_block= { //FIXME add border maybe
- .color= {128,128,128},
- .mx= 0,
- .my= 0,
- .ref= 0,
- .type= 0,
- .level= 0,
-};
-
-#define LOG2_MB_SIZE 4
-#define MB_SIZE (1<<LOG2_MB_SIZE)
-#define ENCODER_EXTRA_BITS 4
-#define HTAPS_MAX 8
-
-typedef struct x_and_coeff{
- int16_t x;
- uint16_t coeff;
-} x_and_coeff;
-
-typedef struct SubBand{
- int level;
- int stride;
- int width;
- int height;
- int qlog; ///< log(qscale)/log[2^(1/6)]
- DWTELEM *buf;
- IDWTELEM *ibuf;
- int buf_x_offset;
- int buf_y_offset;
- int stride_line; ///< Stride measured in lines, not pixels.
- x_and_coeff * x_coeff;
- struct SubBand *parent;
- uint8_t state[/*7*2*/ 7 + 512][32];
-}SubBand;
-
-typedef struct Plane{
- int width;
- int height;
- SubBand band[MAX_DECOMPOSITIONS][4];
-
- int htaps;
- int8_t hcoeff[HTAPS_MAX/2];
- int diag_mc;
- int fast_mc;
-
- int last_htaps;
- int8_t last_hcoeff[HTAPS_MAX/2];
- int last_diag_mc;
-}Plane;
-
-typedef struct SnowContext{
- AVClass *class;
- AVCodecContext *avctx;
- RangeCoder c;
- DSPContext dsp;
- DWTContext dwt;
- AVFrame new_picture;
- AVFrame input_picture; ///< new_picture with the internal linesizes
- AVFrame current_picture;
- AVFrame last_picture[MAX_REF_FRAMES];
- uint8_t *halfpel_plane[MAX_REF_FRAMES][4][4];
- AVFrame mconly_picture;
-// uint8_t q_context[16];
- uint8_t header_state[32];
- uint8_t block_state[128 + 32*128];
- int keyframe;
- int always_reset;
- int version;
- int spatial_decomposition_type;
- int last_spatial_decomposition_type;
- int temporal_decomposition_type;
- int spatial_decomposition_count;
- int last_spatial_decomposition_count;
- int temporal_decomposition_count;
- int max_ref_frames;
- int ref_frames;
- int16_t (*ref_mvs[MAX_REF_FRAMES])[2];
- uint32_t *ref_scores[MAX_REF_FRAMES];
- DWTELEM *spatial_dwt_buffer;
- IDWTELEM *spatial_idwt_buffer;
- int colorspace_type;
- int chroma_h_shift;
- int chroma_v_shift;
- int spatial_scalability;
- int qlog;
- int last_qlog;
- int lambda;
- int lambda2;
- int pass1_rc;
- int mv_scale;
- int last_mv_scale;
- int qbias;
- int last_qbias;
-#define QBIAS_SHIFT 3
- int b_width;
- int b_height;
- int block_max_depth;
- int last_block_max_depth;
- Plane plane[MAX_PLANES];
- BlockNode *block;
-#define ME_CACHE_SIZE 1024
- int me_cache[ME_CACHE_SIZE];
- int me_cache_generation;
- slice_buffer sb;
- int memc_only;
-
- MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to eventually make the motion estimation independent of MpegEncContext, so this will be removed then (FIXME/XXX)
-
- uint8_t *scratchbuf;
-}SnowContext;
-
-#ifdef __sgi
-// Avoid a name clash on SGI IRIX
-#undef qexp
-#endif
-#define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0
-static uint8_t qexp[QROOT];
-
-static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){
- int i;
-
- if(v){
- const int a= FFABS(v);
- const int e= av_log2(a);
- const int el= FFMIN(e, 10);
- put_rac(c, state+0, 0);
-
- for(i=0; i<el; i++){
- put_rac(c, state+1+i, 1); //1..10
- }
- for(; i<e; i++){
- put_rac(c, state+1+9, 1); //1..10
- }
- put_rac(c, state+1+FFMIN(i,9), 0);
-
- for(i=e-1; i>=el; i--){
- put_rac(c, state+22+9, (a>>i)&1); //22..31
- }
- for(; i>=0; i--){
- put_rac(c, state+22+i, (a>>i)&1); //22..31
- }
-
- if(is_signed)
- put_rac(c, state+11 + el, v < 0); //11..21
- }else{
- put_rac(c, state+0, 1);
- }
-}
-
-static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){
- if(get_rac(c, state+0))
- return 0;
- else{
- int i, e, a;
- e= 0;
- while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10
- e++;
- }
-
- a= 1;
- for(i=e-1; i>=0; i--){
- a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31
- }
-
- e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21
- return (a^e)-e;
- }
-}
-
-static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){
- int i;
- int r= log2>=0 ? 1<<log2 : 1;
-
- assert(v>=0);
- assert(log2>=-4);
- while(v >= r){
- put_rac(c, state+4+log2, 1);
- v -= r;
- log2++;
- if(log2>0) r+=r;
- }
- put_rac(c, state+4+log2, 0);
-
- for(i=log2-1; i>=0; i--){
- put_rac(c, state+31-i, (v>>i)&1);
- }
-}
-
-static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){
- int i;
- int r= log2>=0 ? 1<<log2 : 1;
- int v=0;
-
- assert(log2>=-4);
-
- while(get_rac(c, state+4+log2)){
- v+= r;
- log2++;
- if(log2>0) r+=r;
- }
-
- for(i=log2-1; i>=0; i--){
- v+= get_rac(c, state+31-i)<<i;
- }
-
- return v;
-}
-
-static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){
- const int w= b->width;
- const int h= b->height;
- int x,y;
-
- int run, runs;
- x_and_coeff *xc= b->x_coeff;
- x_and_coeff *prev_xc= NULL;
- x_and_coeff *prev2_xc= xc;
- x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL;
- x_and_coeff *prev_parent_xc= parent_xc;
-
- runs= get_symbol2(&s->c, b->state[30], 0);
- if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
- else run= INT_MAX;
-
- for(y=0; y<h; y++){
- int v=0;
- int lt=0, t=0, rt=0;
-
- if(y && prev_xc->x == 0){
- rt= prev_xc->coeff;
- }
- for(x=0; x<w; x++){
- int p=0;
- const int l= v;
-
- lt= t; t= rt;
-
- if(y){
- if(prev_xc->x <= x)
- prev_xc++;
- if(prev_xc->x == x + 1)
- rt= prev_xc->coeff;
- else
- rt=0;
- }
- if(parent_xc){
- if(x>>1 > parent_xc->x){
- parent_xc++;
- }
- if(x>>1 == parent_xc->x){
- p= parent_xc->coeff;
- }
- }
- if(/*ll|*/l|lt|t|rt|p){
- int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1));
-
- v=get_rac(&s->c, &b->state[0][context]);
- if(v){
- v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1);
- v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l&0xFF] + 3*quant3bA[t&0xFF]]);
+void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
+ int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
+ int y, x;
+ IDWTELEM * dst;
+ for(y=0; y<b_h; y++){
+ //FIXME ugly misuse of obmc_stride
+ const uint8_t *obmc1= obmc + y*obmc_stride;
+ const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
+ const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
+ const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
+ dst = slice_buffer_get_line(sb, src_y + y);
+ for(x=0; x<b_w; x++){
+ int v= obmc1[x] * block[3][x + y*src_stride]
+ +obmc2[x] * block[2][x + y*src_stride]
+ +obmc3[x] * block[1][x + y*src_stride]
+ +obmc4[x] * block[0][x + y*src_stride];
- xc->x=x;
- (xc++)->coeff= v;
- }
- }else{
- if(!run){
- if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
- else run= INT_MAX;
- v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1);
- v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]);
-
- xc->x=x;
- (xc++)->coeff= v;
- }else{
- int max_run;
- run--;
- v=0;
-
- if(y) max_run= FFMIN(run, prev_xc->x - x - 2);
- else max_run= FFMIN(run, w-x-1);
- if(parent_xc)
- max_run= FFMIN(max_run, 2*parent_xc->x - x - 1);
- x+= max_run;
- run-= max_run;
- }
+ v <<= 8 - LOG2_OBMC_MAX;
+ if(FRAC_BITS != 8){
+ v >>= 8 - FRAC_BITS;
}
- }
- (xc++)->x= w+1; //end marker
- prev_xc= prev2_xc;
- prev2_xc= xc;
-
- if(parent_xc){
- if(y&1){
- while(parent_xc->x != parent->width+1)
- parent_xc++;
- parent_xc++;
- prev_parent_xc= parent_xc;
+ if(add){
+ v += dst[x + src_x];
+ v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
+ if(v&(~255)) v= ~(v>>31);
+ dst8[x + y*src_stride] = v;
}else{
- parent_xc= prev_parent_xc;
+ dst[x + src_x] -= v;
}
}
}
-
- (xc++)->x= w+1; //end marker
-}
-
-static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){
- const int w= b->width;
- int y;
- const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
- int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
- int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
- int new_index = 0;
-
- if(b->ibuf == s->spatial_idwt_buffer || s->qlog == LOSSLESS_QLOG){
- qadd= 0;
- qmul= 1<<QEXPSHIFT;
- }
-
- /* If we are on the second or later slice, restore our index. */
- if (start_y != 0)
- new_index = save_state[0];
-
-
- for(y=start_y; y<h; y++){
- int x = 0;
- int v;
- IDWTELEM * line = slice_buffer_get_line(sb, y * b->stride_line + b->buf_y_offset) + b->buf_x_offset;
- memset(line, 0, b->width*sizeof(IDWTELEM));
- v = b->x_coeff[new_index].coeff;
- x = b->x_coeff[new_index++].x;
- while(x < w){
- register int t= ( (v>>1)*qmul + qadd)>>QEXPSHIFT;
- register int u= -(v&1);
- line[x] = (t^u) - u;
-
- v = b->x_coeff[new_index].coeff;
- x = b->x_coeff[new_index++].x;
- }
- }
-
- /* Save our variables for the next slice. */
- save_state[0] = new_index;
-
- return;
}
-static void reset_contexts(SnowContext *s){ //FIXME better initial contexts
+void ff_snow_reset_contexts(SnowContext *s){ //FIXME better initial contexts
int plane_index, level, orientation;
for(plane_index=0; plane_index<3; plane_index++){
@@ -512,7 +82,7 @@ static void reset_contexts(SnowContext *s){ //FIXME better initial contexts
memset(s->block_state, MID_STATE, sizeof(s->block_state));
}
-static int alloc_blocks(SnowContext *s){
+int ff_snow_alloc_blocks(SnowContext *s){
int w= -((-s->avctx->width )>>LOG2_MB_SIZE);
int h= -((-s->avctx->height)>>LOG2_MB_SIZE);
@@ -524,129 +94,15 @@ static int alloc_blocks(SnowContext *s){
return 0;
}
-static inline void set_blocks(SnowContext *s, int level, int x, int y, int l, int cb, int cr, int mx, int my, int ref, int type){
- const int w= s->b_width << s->block_max_depth;
- const int rem_depth= s->block_max_depth - level;
- const int index= (x + y*w) << rem_depth;
- const int block_w= 1<<rem_depth;
- BlockNode block;
- int i,j;
-
- block.color[0]= l;
- block.color[1]= cb;
- block.color[2]= cr;
- block.mx= mx;
- block.my= my;
- block.ref= ref;
- block.type= type;
- block.level= level;
-
- for(j=0; j<block_w; j++){
- for(i=0; i<block_w; i++){
- s->block[index + i + j*w]= block;
- }
- }
-}
-
-static inline void init_ref(MotionEstContext *c, uint8_t *src[3], uint8_t *ref[3], uint8_t *ref2[3], int x, int y, int ref_index){
- const int offset[3]= {
- y*c-> stride + x,
- ((y*c->uvstride + x)>>1),
- ((y*c->uvstride + x)>>1),
- };
+static void init_qexp(void){
int i;
- for(i=0; i<3; i++){
- c->src[0][i]= src [i];
- c->ref[0][i]= ref [i] + offset[i];
- }
- assert(!ref_index);
-}
-
-static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref,
- const BlockNode *left, const BlockNode *top, const BlockNode *tr){
- if(s->ref_frames == 1){
- *mx = mid_pred(left->mx, top->mx, tr->mx);
- *my = mid_pred(left->my, top->my, tr->my);
- }else{
- const int *scale = scale_mv_ref[ref];
- *mx = mid_pred((left->mx * scale[left->ref] + 128) >>8,
- (top ->mx * scale[top ->ref] + 128) >>8,
- (tr ->mx * scale[tr ->ref] + 128) >>8);
- *my = mid_pred((left->my * scale[left->ref] + 128) >>8,
- (top ->my * scale[top ->ref] + 128) >>8,
- (tr ->my * scale[tr ->ref] + 128) >>8);
- }
-}
-
-static av_always_inline int same_block(BlockNode *a, BlockNode *b){
- if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){
- return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2]));
- }else{
- return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA));
- }
-}
-
-static void decode_q_branch(SnowContext *s, int level, int x, int y){
- const int w= s->b_width << s->block_max_depth;
- const int rem_depth= s->block_max_depth - level;
- const int index= (x + y*w) << rem_depth;
- int trx= (x+1)<<rem_depth;
- const BlockNode *left = x ? &s->block[index-1] : &null_block;
- const BlockNode *top = y ? &s->block[index-w] : &null_block;
- const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
- const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
- int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
-
- if(s->keyframe){
- set_blocks(s, level, x, y, null_block.color[0], null_block.color[1], null_block.color[2], null_block.mx, null_block.my, null_block.ref, BLOCK_INTRA);
- return;
- }
-
- if(level==s->block_max_depth || get_rac(&s->c, &s->block_state[4 + s_context])){
- int type, mx, my;
- int l = left->color[0];
- int cb= left->color[1];
- int cr= left->color[2];
- int ref = 0;
- int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
- int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 0*av_log2(2*FFABS(tr->mx - top->mx));
- int my_context= av_log2(2*FFABS(left->my - top->my)) + 0*av_log2(2*FFABS(tr->my - top->my));
-
- type= get_rac(&s->c, &s->block_state[1 + left->type + top->type]) ? BLOCK_INTRA : 0;
-
- if(type){
- pred_mv(s, &mx, &my, 0, left, top, tr);
- l += get_symbol(&s->c, &s->block_state[32], 1);
- cb+= get_symbol(&s->c, &s->block_state[64], 1);
- cr+= get_symbol(&s->c, &s->block_state[96], 1);
- }else{
- if(s->ref_frames > 1)
- ref= get_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], 0);
- pred_mv(s, &mx, &my, ref, left, top, tr);
- mx+= get_symbol(&s->c, &s->block_state[128 + 32*(mx_context + 16*!!ref)], 1);
- my+= get_symbol(&s->c, &s->block_state[128 + 32*(my_context + 16*!!ref)], 1);
- }
- set_blocks(s, level, x, y, l, cb, cr, mx, my, ref, type);
- }else{
- decode_q_branch(s, level+1, 2*x+0, 2*y+0);
- decode_q_branch(s, level+1, 2*x+1, 2*y+0);
- decode_q_branch(s, level+1, 2*x+0, 2*y+1);
- decode_q_branch(s, level+1, 2*x+1, 2*y+1);
- }
-}
-
-static void decode_blocks(SnowContext *s){
- int x, y;
- int w= s->b_width;
- int h= s->b_height;
+ double v=128;
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- decode_q_branch(s, 0, x, y);
- }
+ for(i=0; i<QROOT; i++){
+ qexp[i]= lrintf(v);
+ v *= pow(2, 1.0 / QROOT);
}
}
-
static void mc_block(Plane *p, uint8_t *dst, const uint8_t *src, int stride, int b_w, int b_h, int dx, int dy){
static const uint8_t weight[64]={
8,7,6,5,4,3,2,1,
@@ -831,22 +287,7 @@ static void mc_block(Plane *p, uint8_t *dst, const uint8_t *src, int stride, int
}
}
-#define mca(dx,dy,b_w)\
-static void mc_block_hpel ## dx ## dy ## b_w(uint8_t *dst, const uint8_t *src, int stride, int h){\
- assert(h==b_w);\
- mc_block(NULL, dst, src-(HTAPS_MAX/2-1)-(HTAPS_MAX/2-1)*stride, stride, b_w, b_w, dx, dy);\
-}
-
-mca( 0, 0,16)
-mca( 8, 0,16)
-mca( 0, 8,16)
-mca( 8, 8,16)
-mca( 0, 0,8)
-mca( 8, 0,8)
-mca( 0, 8,8)
-mca( 8, 8,8)
-
-static void pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride, int sx, int sy, int b_w, int b_h, BlockNode *block, int plane_index, int w, int h){
+void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride, int sx, int sy, int b_w, int b_h, BlockNode *block, int plane_index, int w, int h){
if(block->type & BLOCK_INTRA){
int x, y;
const int color = block->color[plane_index];
@@ -926,445 +367,22 @@ static void pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride, i
}
}
-void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
- int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
- int y, x;
- IDWTELEM * dst;
- for(y=0; y<b_h; y++){
- //FIXME ugly misuse of obmc_stride
- const uint8_t *obmc1= obmc + y*obmc_stride;
- const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
- const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
- const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
- dst = slice_buffer_get_line(sb, src_y + y);
- for(x=0; x<b_w; x++){
- int v= obmc1[x] * block[3][x + y*src_stride]
- +obmc2[x] * block[2][x + y*src_stride]
- +obmc3[x] * block[1][x + y*src_stride]
- +obmc4[x] * block[0][x + y*src_stride];
-
- v <<= 8 - LOG2_OBMC_MAX;
- if(FRAC_BITS != 8){
- v >>= 8 - FRAC_BITS;
- }
- if(add){
- v += dst[x + src_x];
- v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
- if(v&(~255)) v= ~(v>>31);
- dst8[x + y*src_stride] = v;
- }else{
- dst[x + src_x] -= v;
- }
- }
- }
-}
-
-//FIXME name cleanup (b_w, block_w, b_width stuff)
-static av_always_inline void add_yblock(SnowContext *s, int sliced, slice_buffer *sb, IDWTELEM *dst, uint8_t *dst8, const uint8_t *obmc, int src_x, int src_y, int b_w, int b_h, int w, int h, int dst_stride, int src_stride, int obmc_stride, int b_x, int b_y, int add, int offset_dst, int plane_index){
- const int b_width = s->b_width << s->block_max_depth;
- const int b_height= s->b_height << s->block_max_depth;
- const int b_stride= b_width;
- BlockNode *lt= &s->block[b_x + b_y*b_stride];
- BlockNode *rt= lt+1;
- BlockNode *lb= lt+b_stride;
- BlockNode *rb= lb+1;
- uint8_t *block[4];
- int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride;
- uint8_t *tmp = s->scratchbuf;
- uint8_t *ptmp;
- int x,y;
-
- if(b_x<0){
- lt= rt;
- lb= rb;
- }else if(b_x + 1 >= b_width){
- rt= lt;
- rb= lb;
- }
- if(b_y<0){
- lt= lb;
- rt= rb;
- }else if(b_y + 1 >= b_height){
- lb= lt;
- rb= rt;
- }
-
- if(src_x<0){ //FIXME merge with prev & always round internal width up to *16
- obmc -= src_x;
- b_w += src_x;
- if(!sliced && !offset_dst)
- dst -= src_x;
- src_x=0;
- }else if(src_x + b_w > w){
- b_w = w - src_x;
- }
- if(src_y<0){
- obmc -= src_y*obmc_stride;
- b_h += src_y;
- if(!sliced && !offset_dst)
- dst -= src_y*dst_stride;
- src_y=0;
- }else if(src_y + b_h> h){
- b_h = h - src_y;
- }
-
- if(b_w<=0 || b_h<=0) return;
-
- assert(src_stride > 2*MB_SIZE + 5);
-
- if(!sliced && offset_dst)
- dst += src_x + src_y*dst_stride;
- dst8+= src_x + src_y*src_stride;
-// src += src_x + src_y*src_stride;
-
- ptmp= tmp + 3*tmp_step;
- block[0]= ptmp;
- ptmp+=tmp_step;
- pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h);
-
- if(same_block(lt, rt)){
- block[1]= block[0];
- }else{
- block[1]= ptmp;
- ptmp+=tmp_step;
- pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h);
- }
-
- if(same_block(lt, lb)){
- block[2]= block[0];
- }else if(same_block(rt, lb)){
- block[2]= block[1];
- }else{
- block[2]= ptmp;
- ptmp+=tmp_step;
- pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h);
- }
-
- if(same_block(lt, rb) ){
- block[3]= block[0];
- }else if(same_block(rt, rb)){
- block[3]= block[1];
- }else if(same_block(lb, rb)){
- block[3]= block[2];
- }else{
- block[3]= ptmp;
- pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h);
- }
- if(sliced){
- s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
- }else{
- for(y=0; y<b_h; y++){
- //FIXME ugly misuse of obmc_stride
- const uint8_t *obmc1= obmc + y*obmc_stride;
- const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
- const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
- const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
- for(x=0; x<b_w; x++){
- int v= obmc1[x] * block[3][x + y*src_stride]
- +obmc2[x] * block[2][x + y*src_stride]
- +obmc3[x] * block[1][x + y*src_stride]
- +obmc4[x] * block[0][x + y*src_stride];
-
- v <<= 8 - LOG2_OBMC_MAX;
- if(FRAC_BITS != 8){
- v >>= 8 - FRAC_BITS;
- }
- if(add){
- v += dst[x + y*dst_stride];
- v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
- if(v&(~255)) v= ~(v>>31);
- dst8[x + y*src_stride] = v;
- }else{
- dst[x + y*dst_stride] -= v;
- }
- }
- }
- }
-}
-
-static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer * sb, IDWTELEM * old_buffer, int plane_index, int add, int mb_y){
- Plane *p= &s->plane[plane_index];
- const int mb_w= s->b_width << s->block_max_depth;
- const int mb_h= s->b_height << s->block_max_depth;
- int x, y, mb_x;
- int block_size = MB_SIZE >> s->block_max_depth;
- int block_w = plane_index ? block_size/2 : block_size;
- const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
- int obmc_stride= plane_index ? block_size : 2*block_size;
- int ref_stride= s->current_picture.linesize[plane_index];
- uint8_t *dst8= s->current_picture.data[plane_index];
- int w= p->width;
- int h= p->height;
-
- if(s->keyframe || (s->avctx->debug&512)){
- if(mb_y==mb_h)
- return;
-
- if(add){
- for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
-// DWTELEM * line = slice_buffer_get_line(sb, y);
- IDWTELEM * line = sb->line[y];
- for(x=0; x<w; x++){
-// int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
- int v= line[x] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
- v >>= FRAC_BITS;
- if(v&(~255)) v= ~(v>>31);
- dst8[x + y*ref_stride]= v;
- }
- }
- }else{
- for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
-// DWTELEM * line = slice_buffer_get_line(sb, y);
- IDWTELEM * line = sb->line[y];
- for(x=0; x<w; x++){
- line[x] -= 128 << FRAC_BITS;
-// buf[x + y*w]-= 128<<FRAC_BITS;
- }
- }
- }
-
- return;
- }
-
- for(mb_x=0; mb_x<=mb_w; mb_x++){
- add_yblock(s, 1, sb, old_buffer, dst8, obmc,
- block_w*mb_x - block_w/2,
- block_w*mb_y - block_w/2,
- block_w, block_w,
- w, h,
- w, ref_stride, obmc_stride,
- mb_x - 1, mb_y - 1,
- add, 0, plane_index);
- }
-}
-
-static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){
- Plane *p= &s->plane[plane_index];
- const int mb_w= s->b_width << s->block_max_depth;
- const int mb_h= s->b_height << s->block_max_depth;
- int x, y, mb_x;
- int block_size = MB_SIZE >> s->block_max_depth;
- int block_w = plane_index ? block_size/2 : block_size;
- const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
- const int obmc_stride= plane_index ? block_size : 2*block_size;
- int ref_stride= s->current_picture.linesize[plane_index];
- uint8_t *dst8= s->current_picture.data[plane_index];
- int w= p->width;
- int h= p->height;
-
- if(s->keyframe || (s->avctx->debug&512)){
- if(mb_y==mb_h)
- return;
-
- if(add){
- for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
- for(x=0; x<w; x++){
- int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
- v >>= FRAC_BITS;
- if(v&(~255)) v= ~(v>>31);
- dst8[x + y*ref_stride]= v;
- }
- }
- }else{
- for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
- for(x=0; x<w; x++){
- buf[x + y*w]-= 128<<FRAC_BITS;
- }
- }
- }
-
- return;
- }
-
- for(mb_x=0; mb_x<=mb_w; mb_x++){
- add_yblock(s, 0, NULL, buf, dst8, obmc,
- block_w*mb_x - block_w/2,
- block_w*mb_y - block_w/2,
- block_w, block_w,
- w, h,
- w, ref_stride, obmc_stride,
- mb_x - 1, mb_y - 1,
- add, 1, plane_index);
- }
-}
-
-static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){
- const int mb_h= s->b_height << s->block_max_depth;
- int mb_y;
- for(mb_y=0; mb_y<=mb_h; mb_y++)
- predict_slice(s, buf, plane_index, add, mb_y);
-}
-
-static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y){
- const int w= b->width;
- const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
- const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
- const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
- int x,y;
-
- if(s->qlog == LOSSLESS_QLOG) return;
-
- for(y=start_y; y<end_y; y++){
-// DWTELEM * line = slice_buffer_get_line_from_address(sb, src + (y * stride));
- IDWTELEM * line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
- for(x=0; x<w; x++){
- int i= line[x];
- if(i<0){
- line[x]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
- }else if(i>0){
- line[x]= (( i*qmul + qadd)>>(QEXPSHIFT));
- }
- }
- }
-}
-
-static void correlate_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median, int start_y, int end_y){
- const int w= b->width;
- int x,y;
-
- IDWTELEM * line=0; // silence silly "could be used without having been initialized" warning
- IDWTELEM * prev;
-
- if (start_y != 0)
- line = slice_buffer_get_line(sb, ((start_y - 1) * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
-
- for(y=start_y; y<end_y; y++){
- prev = line;
-// line = slice_buffer_get_line_from_address(sb, src + (y * stride));
- line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
- for(x=0; x<w; x++){
- if(x){
- if(use_median){
- if(y && x+1<w) line[x] += mid_pred(line[x - 1], prev[x], prev[x + 1]);
- else line[x] += line[x - 1];
- }else{
- if(y) line[x] += mid_pred(line[x - 1], prev[x], line[x - 1] + prev[x] - prev[x - 1]);
- else line[x] += line[x - 1];
- }
- }else{
- if(y) line[x] += prev[x];
- }
- }
- }
-}
-
-static void decode_qlogs(SnowContext *s){
- int plane_index, level, orientation;
-
- for(plane_index=0; plane_index<3; plane_index++){
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1:0; orientation<4; orientation++){
- int q;
- if (plane_index==2) q= s->plane[1].band[level][orientation].qlog;
- else if(orientation==2) q= s->plane[plane_index].band[level][1].qlog;
- else q= get_symbol(&s->c, s->header_state, 1);
- s->plane[plane_index].band[level][orientation].qlog= q;
- }
- }
- }
-}
-
-#define GET_S(dst, check) \
- tmp= get_symbol(&s->c, s->header_state, 0);\
- if(!(check)){\
- av_log(s->avctx, AV_LOG_ERROR, "Error " #dst " is %d\n", tmp);\
- return -1;\
- }\
- dst= tmp;
-
-static int decode_header(SnowContext *s){
- int plane_index, tmp;
- uint8_t kstate[32];
-
- memset(kstate, MID_STATE, sizeof(kstate));
-
- s->keyframe= get_rac(&s->c, kstate);
- if(s->keyframe || s->always_reset){
- reset_contexts(s);
- s->spatial_decomposition_type=
- s->qlog=
- s->qbias=
- s->mv_scale=
- s->block_max_depth= 0;
- }
- if(s->keyframe){
- GET_S(s->version, tmp <= 0U)
- s->always_reset= get_rac(&s->c, s->header_state);
- s->temporal_decomposition_type= get_symbol(&s->c, s->header_state, 0);
- s->temporal_decomposition_count= get_symbol(&s->c, s->header_state, 0);
- GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
- s->colorspace_type= get_symbol(&s->c, s->header_state, 0);
- s->chroma_h_shift= get_symbol(&s->c, s->header_state, 0);
- s->chroma_v_shift= get_symbol(&s->c, s->header_state, 0);
- s->spatial_scalability= get_rac(&s->c, s->header_state);
-// s->rate_scalability= get_rac(&s->c, s->header_state);
- GET_S(s->max_ref_frames, tmp < (unsigned)MAX_REF_FRAMES)
- s->max_ref_frames++;
-
- decode_qlogs(s);
- }
-
- if(!s->keyframe){
- if(get_rac(&s->c, s->header_state)){
- for(plane_index=0; plane_index<2; plane_index++){
- int htaps, i, sum=0;
- Plane *p= &s->plane[plane_index];
- p->diag_mc= get_rac(&s->c, s->header_state);
- htaps= get_symbol(&s->c, s->header_state, 0)*2 + 2;
- if((unsigned)htaps > HTAPS_MAX || htaps==0)
- return -1;
- p->htaps= htaps;
- for(i= htaps/2; i; i--){
- p->hcoeff[i]= get_symbol(&s->c, s->header_state, 0) * (1-2*(i&1));
- sum += p->hcoeff[i];
- }
- p->hcoeff[0]= 32-sum;
- }
- s->plane[2].diag_mc= s->plane[1].diag_mc;
- s->plane[2].htaps = s->plane[1].htaps;
- memcpy(s->plane[2].hcoeff, s->plane[1].hcoeff, sizeof(s->plane[1].hcoeff));
- }
- if(get_rac(&s->c, s->header_state)){
- GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
- decode_qlogs(s);
- }
- }
-
- s->spatial_decomposition_type+= get_symbol(&s->c, s->header_state, 1);
- if(s->spatial_decomposition_type > 1U){
- av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_type %d not supported", s->spatial_decomposition_type);
- return -1;
- }
- if(FFMIN(s->avctx-> width>>s->chroma_h_shift,
- s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 0){
- av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_count %d too large for size", s->spatial_decomposition_count);
- return -1;
- }
-
- s->qlog += get_symbol(&s->c, s->header_state, 1);
- s->mv_scale += get_symbol(&s->c, s->header_state, 1);
- s->qbias += get_symbol(&s->c, s->header_state, 1);
- s->block_max_depth+= get_symbol(&s->c, s->header_state, 1);
- if(s->block_max_depth > 1 || s->block_max_depth < 0){
- av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large", s->block_max_depth);
- s->block_max_depth= 0;
- return -1;
- }
-
- return 0;
+#define mca(dx,dy,b_w)\
+static void mc_block_hpel ## dx ## dy ## b_w(uint8_t *dst, const uint8_t *src, int stride, int h){\
+ assert(h==b_w);\
+ mc_block(NULL, dst, src-(HTAPS_MAX/2-1)-(HTAPS_MAX/2-1)*stride, stride, b_w, b_w, dx, dy);\
}
-static void init_qexp(void){
- int i;
- double v=128;
-
- for(i=0; i<QROOT; i++){
- qexp[i]= lrintf(v);
- v *= pow(2, 1.0 / QROOT);
- }
-}
+mca( 0, 0,16)
+mca( 8, 0,16)
+mca( 0, 8,16)
+mca( 8, 8,16)
+mca( 0, 0,8)
+mca( 8, 0,8)
+mca( 0, 8,8)
+mca( 8, 8,8)
-static av_cold int common_init(AVCodecContext *avctx){
+av_cold int ff_snow_common_init(AVCodecContext *avctx){
SnowContext *s = avctx->priv_data;
int width, height;
int i, j;
@@ -1413,8 +431,7 @@ static av_cold int common_init(AVCodecContext *avctx){
mcfh(0, 8)
mcfh(8, 8)
- if(!qexp[0])
- init_qexp();
+ init_qexp();
// dec += FFMAX(s->chroma_h_shift, s->chroma_v_shift);
@@ -1434,7 +451,7 @@ static av_cold int common_init(AVCodecContext *avctx){
return 0;
}
-static int common_init_after_header(AVCodecContext *avctx){
+int ff_snow_common_init_after_header(AVCodecContext *avctx) {
SnowContext *s = avctx->priv_data;
int plane_index, level, orientation;
@@ -1487,123 +504,6 @@ static int common_init_after_header(AVCodecContext *avctx){
return 0;
}
-#define QUANTIZE2 0
-
-#if QUANTIZE2==1
-#define Q2_STEP 8
-
-static void find_sse(SnowContext *s, Plane *p, int *score, int score_stride, IDWTELEM *r0, IDWTELEM *r1, int level, int orientation){
- SubBand *b= &p->band[level][orientation];
- int x, y;
- int xo=0;
- int yo=0;
- int step= 1 << (s->spatial_decomposition_count - level);
-
- if(orientation&1)
- xo= step>>1;
- if(orientation&2)
- yo= step>>1;
-
- //FIXME bias for nonzero ?
- //FIXME optimize
- memset(score, 0, sizeof(*score)*score_stride*((p->height + Q2_STEP-1)/Q2_STEP));
- for(y=0; y<p->height; y++){
- for(x=0; x<p->width; x++){
- int sx= (x-xo + step/2) / step / Q2_STEP;
- int sy= (y-yo + step/2) / step / Q2_STEP;
- int v= r0[x + y*p->width] - r1[x + y*p->width];
- assert(sx>=0 && sy>=0 && sx < score_stride);
- v= ((v+8)>>4)<<4;
- score[sx + sy*score_stride] += v*v;
- assert(score[sx + sy*score_stride] >= 0);
- }
- }
-}
-
-static void dequantize_all(SnowContext *s, Plane *p, IDWTELEM *buffer, int width, int height){
- int level, orientation;
-
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &p->band[level][orientation];
- IDWTELEM *dst= buffer + (b->ibuf - s->spatial_idwt_buffer);
-
- dequantize(s, b, dst, b->stride);
- }
- }
-}
-
-static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, int height, int stride, int type){
- int level, orientation, ys, xs, x, y, pass;
- IDWTELEM best_dequant[height * stride];
- IDWTELEM idwt2_buffer[height * stride];
- const int score_stride= (width + 10)/Q2_STEP;
- int best_score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
- int score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
- int threshold= (s->m.lambda * s->m.lambda) >> 6;
-
- //FIXME pass the copy cleanly ?
-
-// memcpy(dwt_buffer, buffer, height * stride * sizeof(DWTELEM));
- ff_spatial_dwt(buffer, width, height, stride, type, s->spatial_decomposition_count);
-
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &p->band[level][orientation];
- IDWTELEM *dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
- DWTELEM *src= buffer + (b-> buf - s->spatial_dwt_buffer);
- assert(src == b->buf); // code does not depend on this but it is true currently
-
- quantize(s, b, dst, src, b->stride, s->qbias);
- }
- }
- for(pass=0; pass<1; pass++){
- if(s->qbias == 0) //keyframe
- continue;
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &p->band[level][orientation];
- IDWTELEM *dst= idwt2_buffer + (b->ibuf - s->spatial_idwt_buffer);
- IDWTELEM *best_dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
-
- for(ys= 0; ys<Q2_STEP; ys++){
- for(xs= 0; xs<Q2_STEP; xs++){
- memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
- dequantize_all(s, p, idwt2_buffer, width, height);
- ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
- find_sse(s, p, best_score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
- memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
- for(y=ys; y<b->height; y+= Q2_STEP){
- for(x=xs; x<b->width; x+= Q2_STEP){
- if(dst[x + y*b->stride]<0) dst[x + y*b->stride]++;
- if(dst[x + y*b->stride]>0) dst[x + y*b->stride]--;
- //FIXME try more than just --
- }
- }
- dequantize_all(s, p, idwt2_buffer, width, height);
- ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
- find_sse(s, p, score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
- for(y=ys; y<b->height; y+= Q2_STEP){
- for(x=xs; x<b->width; x+= Q2_STEP){
- int score_idx= x/Q2_STEP + (y/Q2_STEP)*score_stride;
- if(score[score_idx] <= best_score[score_idx] + threshold){
- best_score[score_idx]= score[score_idx];
- if(best_dst[x + y*b->stride]<0) best_dst[x + y*b->stride]++;
- if(best_dst[x + y*b->stride]>0) best_dst[x + y*b->stride]--;
- //FIXME copy instead
- }
- }
- }
- }
- }
- }
- }
- }
- memcpy(s->spatial_idwt_buffer, best_dequant, height * stride * sizeof(IDWTELEM)); //FIXME work with that directly instead of copy at the end
-}
-
-#endif /* QUANTIZE2==1 */
-
#define USE_HALFPEL_PLANE 0
static void halfpel_interpol(SnowContext *s, uint8_t *halfpel[4][4], AVFrame *frame){
@@ -1648,7 +548,8 @@ static void halfpel_interpol(SnowContext *s, uint8_t *halfpel[4][4], AVFrame *fr
}
}
-static void release_buffer(AVCodecContext *avctx){
+void ff_snow_release_buffer(AVCodecContext *avctx)
+{
SnowContext *s = avctx->priv_data;
int i;
@@ -1660,7 +561,7 @@ static void release_buffer(AVCodecContext *avctx){
}
}
-static int frame_start(SnowContext *s){
+int ff_snow_frame_start(SnowContext *s){
AVFrame tmp;
int w= s->avctx->width; //FIXME round up to x16 ?
int h= s->avctx->height;
@@ -1677,7 +578,7 @@ static int frame_start(SnowContext *s){
EDGE_WIDTH/2, EDGE_WIDTH/2, EDGE_TOP | EDGE_BOTTOM);
}
- release_buffer(s->avctx);
+ ff_snow_release_buffer(s->avctx);
tmp= s->last_picture[s->max_ref_frames-1];
memmove(s->last_picture+1, s->last_picture, (s->max_ref_frames-1)*sizeof(AVFrame));
@@ -1712,7 +613,8 @@ static int frame_start(SnowContext *s){
return 0;
}
-static av_cold void common_end(SnowContext *s){
+av_cold void ff_snow_common_end(SnowContext *s)
+{
int plane_index, level, orientation, i;
av_freep(&s->spatial_dwt_buffer);
@@ -1749,1957 +651,3 @@ static av_cold void common_end(SnowContext *s){
s->avctx->release_buffer(s->avctx, &s->current_picture);
}
-static av_cold int decode_init(AVCodecContext *avctx)
-{
- avctx->pix_fmt= PIX_FMT_YUV420P;
-
- common_init(avctx);
-
- return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- SnowContext *s = avctx->priv_data;
- RangeCoder * const c= &s->c;
- int bytes_read;
- AVFrame *picture = data;
- int level, orientation, plane_index;
-
- ff_init_range_decoder(c, buf, buf_size);
- ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
-
- s->current_picture.pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P
- if(decode_header(s)<0)
- return -1;
- common_init_after_header(avctx);
-
- // realloc slice buffer for the case that spatial_decomposition_count changed
- ff_slice_buffer_destroy(&s->sb);
- ff_slice_buffer_init(&s->sb, s->plane[0].height, (MB_SIZE >> s->block_max_depth) + s->spatial_decomposition_count * 8 + 1, s->plane[0].width, s->spatial_idwt_buffer);
-
- for(plane_index=0; plane_index<3; plane_index++){
- Plane *p= &s->plane[plane_index];
- p->fast_mc= p->diag_mc && p->htaps==6 && p->hcoeff[0]==40
- && p->hcoeff[1]==-10
- && p->hcoeff[2]==2;
- }
-
- alloc_blocks(s);
-
- if(frame_start(s) < 0)
- return -1;
- //keyframe flag duplication mess FIXME
- if(avctx->debug&FF_DEBUG_PICT_INFO)
- av_log(avctx, AV_LOG_ERROR, "keyframe:%d qlog:%d\n", s->keyframe, s->qlog);
-
- decode_blocks(s);
-
- for(plane_index=0; plane_index<3; plane_index++){
- Plane *p= &s->plane[plane_index];
- int w= p->width;
- int h= p->height;
- int x, y;
- int decode_state[MAX_DECOMPOSITIONS][4][1]; /* Stored state info for unpack_coeffs. 1 variable per instance. */
-
- if(s->avctx->debug&2048){
- memset(s->spatial_dwt_buffer, 0, sizeof(DWTELEM)*w*h);
- predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
-
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- int v= s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x];
- s->mconly_picture.data[plane_index][y*s->mconly_picture.linesize[plane_index] + x]= v;
- }
- }
- }
-
- {
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &p->band[level][orientation];
- unpack_coeffs(s, b, b->parent, orientation);
- }
- }
- }
-
- {
- const int mb_h= s->b_height << s->block_max_depth;
- const int block_size = MB_SIZE >> s->block_max_depth;
- const int block_w = plane_index ? block_size/2 : block_size;
- int mb_y;
- DWTCompose cs[MAX_DECOMPOSITIONS];
- int yd=0, yq=0;
- int y;
- int end_y;
-
- ff_spatial_idwt_buffered_init(cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count);
- for(mb_y=0; mb_y<=mb_h; mb_y++){
-
- int slice_starty = block_w*mb_y;
- int slice_h = block_w*(mb_y+1);
- if (!(s->keyframe || s->avctx->debug&512)){
- slice_starty = FFMAX(0, slice_starty - (block_w >> 1));
- slice_h -= (block_w >> 1);
- }
-
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &p->band[level][orientation];
- int start_y;
- int end_y;
- int our_mb_start = mb_y;
- int our_mb_end = (mb_y + 1);
- const int extra= 3;
- start_y = (mb_y ? ((block_w * our_mb_start) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra: 0);
- end_y = (((block_w * our_mb_end) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra);
- if (!(s->keyframe || s->avctx->debug&512)){
- start_y = FFMAX(0, start_y - (block_w >> (1+s->spatial_decomposition_count - level)));
- end_y = FFMAX(0, end_y - (block_w >> (1+s->spatial_decomposition_count - level)));
- }
- start_y = FFMIN(b->height, start_y);
- end_y = FFMIN(b->height, end_y);
-
- if (start_y != end_y){
- if (orientation == 0){
- SubBand * correlate_band = &p->band[0][0];
- int correlate_end_y = FFMIN(b->height, end_y + 1);
- int correlate_start_y = FFMIN(b->height, (start_y ? start_y + 1 : 0));
- decode_subband_slice_buffered(s, correlate_band, &s->sb, correlate_start_y, correlate_end_y, decode_state[0][0]);
- correlate_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, 1, 0, correlate_start_y, correlate_end_y);
- dequantize_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, start_y, end_y);
- }
- else
- decode_subband_slice_buffered(s, b, &s->sb, start_y, end_y, decode_state[level][orientation]);
- }
- }
- }
-
- for(; yd<slice_h; yd+=4){
- ff_spatial_idwt_buffered_slice(&s->dwt, cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count, yd);
- }
-
- if(s->qlog == LOSSLESS_QLOG){
- for(; yq<slice_h && yq<h; yq++){
- IDWTELEM * line = slice_buffer_get_line(&s->sb, yq);
- for(x=0; x<w; x++){
- line[x] <<= FRAC_BITS;
- }
- }
- }
-
- predict_slice_buffered(s, &s->sb, s->spatial_idwt_buffer, plane_index, 1, mb_y);
-
- y = FFMIN(p->height, slice_starty);
- end_y = FFMIN(p->height, slice_h);
- while(y < end_y)
- ff_slice_buffer_release(&s->sb, y++);
- }
-
- ff_slice_buffer_flush(&s->sb);
- }
-
- }
-
- emms_c();
-
- release_buffer(avctx);
-
- if(!(s->avctx->debug&2048))
- *picture= s->current_picture;
- else
- *picture= s->mconly_picture;
-
- *data_size = sizeof(AVFrame);
-
- bytes_read= c->bytestream - c->bytestream_start;
- if(bytes_read ==0) av_log(s->avctx, AV_LOG_ERROR, "error at end of frame\n"); //FIXME
-
- return bytes_read;
-}
-
-static av_cold int decode_end(AVCodecContext *avctx)
-{
- SnowContext *s = avctx->priv_data;
-
- ff_slice_buffer_destroy(&s->sb);
-
- common_end(s);
-
- return 0;
-}
-
-AVCodec ff_snow_decoder = {
- .name = "snow",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = CODEC_ID_SNOW,
- .priv_data_size = sizeof(SnowContext),
- .init = decode_init,
- .close = decode_end,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,
- .long_name = NULL_IF_CONFIG_SMALL("Snow"),
-};
-
-#if CONFIG_SNOW_ENCODER
-static av_cold int encode_init(AVCodecContext *avctx)
-{
- SnowContext *s = avctx->priv_data;
- int plane_index;
-
- if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
- av_log(avctx, AV_LOG_ERROR, "This codec is under development, files encoded with it may not be decodable with future versions!!!\n"
- "Use vstrict=-2 / -strict -2 to use it anyway.\n");
- return -1;
- }
-
- if(avctx->prediction_method == DWT_97
- && (avctx->flags & CODEC_FLAG_QSCALE)
- && avctx->global_quality == 0){
- av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
- return -1;
- }
-
- s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
-
- s->mv_scale = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
- s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
-
- for(plane_index=0; plane_index<3; plane_index++){
- s->plane[plane_index].diag_mc= 1;
- s->plane[plane_index].htaps= 6;
- s->plane[plane_index].hcoeff[0]= 40;
- s->plane[plane_index].hcoeff[1]= -10;
- s->plane[plane_index].hcoeff[2]= 2;
- s->plane[plane_index].fast_mc= 1;
- }
-
- common_init(avctx);
- alloc_blocks(s);
-
- s->version=0;
-
- s->m.avctx = avctx;
- s->m.flags = avctx->flags;
- s->m.bit_rate= avctx->bit_rate;
-
- s->m.me.temp =
- s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
- s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
- s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
- s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
- h263_encode_init(&s->m); //mv_penalty
-
- s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
-
- if(avctx->flags&CODEC_FLAG_PASS1){
- if(!avctx->stats_out)
- avctx->stats_out = av_mallocz(256);
- }
- if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
- if(ff_rate_control_init(&s->m) < 0)
- return -1;
- }
- s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
-
- avctx->coded_frame= &s->current_picture;
- switch(avctx->pix_fmt){
-// case PIX_FMT_YUV444P:
-// case PIX_FMT_YUV422P:
- case PIX_FMT_YUV420P:
- case PIX_FMT_GRAY8:
-// case PIX_FMT_YUV411P:
-// case PIX_FMT_YUV410P:
- s->colorspace_type= 0;
- break;
-/* case PIX_FMT_RGB32:
- s->colorspace= 1;
- break;*/
- default:
- av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
- return -1;
- }
-// avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
- s->chroma_h_shift= 1;
- s->chroma_v_shift= 1;
-
- ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
- ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
-
- s->avctx->get_buffer(s->avctx, &s->input_picture);
-
- if(s->avctx->me_method == ME_ITER){
- int i;
- int size= s->b_width * s->b_height << 2*s->block_max_depth;
- for(i=0; i<s->max_ref_frames; i++){
- s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
- s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
- }
- }
-
- return 0;
-}
-
-//near copy & paste from dsputil, FIXME
-static int pix_sum(uint8_t * pix, int line_size, int w)
-{
- int s, i, j;
-
- s = 0;
- for (i = 0; i < w; i++) {
- for (j = 0; j < w; j++) {
- s += pix[0];
- pix ++;
- }
- pix += line_size - w;
- }
- return s;
-}
-
-//near copy & paste from dsputil, FIXME
-static int pix_norm1(uint8_t * pix, int line_size, int w)
-{
- int s, i, j;
- uint32_t *sq = ff_squareTbl + 256;
-
- s = 0;
- for (i = 0; i < w; i++) {
- for (j = 0; j < w; j ++) {
- s += sq[pix[0]];
- pix ++;
- }
- pix += line_size - w;
- }
- return s;
-}
-
-//FIXME copy&paste
-#define P_LEFT P[1]
-#define P_TOP P[2]
-#define P_TOPRIGHT P[3]
-#define P_MEDIAN P[4]
-#define P_MV1 P[9]
-#define FLAG_QPEL 1 //must be 1
-
-static int encode_q_branch(SnowContext *s, int level, int x, int y){
- uint8_t p_buffer[1024];
- uint8_t i_buffer[1024];
- uint8_t p_state[sizeof(s->block_state)];
- uint8_t i_state[sizeof(s->block_state)];
- RangeCoder pc, ic;
- uint8_t *pbbak= s->c.bytestream;
- uint8_t *pbbak_start= s->c.bytestream_start;
- int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
- const int w= s->b_width << s->block_max_depth;
- const int h= s->b_height << s->block_max_depth;
- const int rem_depth= s->block_max_depth - level;
- const int index= (x + y*w) << rem_depth;
- const int block_w= 1<<(LOG2_MB_SIZE - level);
- int trx= (x+1)<<rem_depth;
- int try= (y+1)<<rem_depth;
- const BlockNode *left = x ? &s->block[index-1] : &null_block;
- const BlockNode *top = y ? &s->block[index-w] : &null_block;
- const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
- const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
- const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
- const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
- int pl = left->color[0];
- int pcb= left->color[1];
- int pcr= left->color[2];
- int pmx, pmy;
- int mx=0, my=0;
- int l,cr,cb;
- const int stride= s->current_picture.linesize[0];
- const int uvstride= s->current_picture.linesize[1];
- uint8_t *current_data[3]= { s->input_picture.data[0] + (x + y* stride)*block_w,
- s->input_picture.data[1] + (x + y*uvstride)*block_w/2,
- s->input_picture.data[2] + (x + y*uvstride)*block_w/2};
- int P[10][2];
- int16_t last_mv[3][2];
- int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
- const int shift= 1+qpel;
- MotionEstContext *c= &s->m.me;
- int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
- int mx_context= av_log2(2*FFABS(left->mx - top->mx));
- int my_context= av_log2(2*FFABS(left->my - top->my));
- int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
- int ref, best_ref, ref_score, ref_mx, ref_my;
-
- assert(sizeof(s->block_state) >= 256);
- if(s->keyframe){
- set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
- return 0;
- }
-
-// clip predictors / edge ?
-
- P_LEFT[0]= left->mx;
- P_LEFT[1]= left->my;
- P_TOP [0]= top->mx;
- P_TOP [1]= top->my;
- P_TOPRIGHT[0]= tr->mx;
- P_TOPRIGHT[1]= tr->my;
-
- last_mv[0][0]= s->block[index].mx;
- last_mv[0][1]= s->block[index].my;
- last_mv[1][0]= right->mx;
- last_mv[1][1]= right->my;
- last_mv[2][0]= bottom->mx;
- last_mv[2][1]= bottom->my;
-
- s->m.mb_stride=2;
- s->m.mb_x=
- s->m.mb_y= 0;
- c->skip= 0;
-
- assert(c-> stride == stride);
- assert(c->uvstride == uvstride);
-
- c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
- c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
- c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
- c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
-
- c->xmin = - x*block_w - 16+3;
- c->ymin = - y*block_w - 16+3;
- c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
- c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
-
- if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
- if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
- if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
- if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
- if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
- if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
- if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
-
- P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
- P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
-
- if (!y) {
- c->pred_x= P_LEFT[0];
- c->pred_y= P_LEFT[1];
- } else {
- c->pred_x = P_MEDIAN[0];
- c->pred_y = P_MEDIAN[1];
- }
-
- score= INT_MAX;
- best_ref= 0;
- for(ref=0; ref<s->ref_frames; ref++){
- init_ref(c, current_data, s->last_picture[ref].data, NULL, block_w*x, block_w*y, 0);
-
- ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
- (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
-
- assert(ref_mx >= c->xmin);
- assert(ref_mx <= c->xmax);
- assert(ref_my >= c->ymin);
- assert(ref_my <= c->ymax);
-
- ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
- ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
- ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
- if(s->ref_mvs[ref]){
- s->ref_mvs[ref][index][0]= ref_mx;
- s->ref_mvs[ref][index][1]= ref_my;
- s->ref_scores[ref][index]= ref_score;
- }
- if(score > ref_score){
- score= ref_score;
- best_ref= ref;
- mx= ref_mx;
- my= ref_my;
- }
- }
- //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
-
- // subpel search
- base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
- pc= s->c;
- pc.bytestream_start=
- pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
- memcpy(p_state, s->block_state, sizeof(s->block_state));
-
- if(level!=s->block_max_depth)
- put_rac(&pc, &p_state[4 + s_context], 1);
- put_rac(&pc, &p_state[1 + left->type + top->type], 0);
- if(s->ref_frames > 1)
- put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
- pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
- put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
- put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
- p_len= pc.bytestream - pc.bytestream_start;
- score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
-
- block_s= block_w*block_w;
- sum = pix_sum(current_data[0], stride, block_w);
- l= (sum + block_s/2)/block_s;
- iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
-
- block_s= block_w*block_w>>2;
- sum = pix_sum(current_data[1], uvstride, block_w>>1);
- cb= (sum + block_s/2)/block_s;
-// iscore += pix_norm1(&current_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
- sum = pix_sum(current_data[2], uvstride, block_w>>1);
- cr= (sum + block_s/2)/block_s;
-// iscore += pix_norm1(&current_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
-
- ic= s->c;
- ic.bytestream_start=
- ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
- memcpy(i_state, s->block_state, sizeof(s->block_state));
- if(level!=s->block_max_depth)
- put_rac(&ic, &i_state[4 + s_context], 1);
- put_rac(&ic, &i_state[1 + left->type + top->type], 1);
- put_symbol(&ic, &i_state[32], l-pl , 1);
- put_symbol(&ic, &i_state[64], cb-pcb, 1);
- put_symbol(&ic, &i_state[96], cr-pcr, 1);
- i_len= ic.bytestream - ic.bytestream_start;
- iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
-
-// assert(score==256*256*256*64-1);
- assert(iscore < 255*255*256 + s->lambda2*10);
- assert(iscore >= 0);
- assert(l>=0 && l<=255);
- assert(pl>=0 && pl<=255);
-
- if(level==0){
- int varc= iscore >> 8;
- int vard= score >> 8;
- if (vard <= 64 || vard < varc)
- c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
- else
- c->scene_change_score+= s->m.qscale;
- }
-
- if(level!=s->block_max_depth){
- put_rac(&s->c, &s->block_state[4 + s_context], 0);
- score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
- score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
- score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
- score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
- score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
-
- if(score2 < score && score2 < iscore)
- return score2;
- }
-
- if(iscore < score){
- pred_mv(s, &pmx, &pmy, 0, left, top, tr);
- memcpy(pbbak, i_buffer, i_len);
- s->c= ic;
- s->c.bytestream_start= pbbak_start;
- s->c.bytestream= pbbak + i_len;
- set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
- memcpy(s->block_state, i_state, sizeof(s->block_state));
- return iscore;
- }else{
- memcpy(pbbak, p_buffer, p_len);
- s->c= pc;
- s->c.bytestream_start= pbbak_start;
- s->c.bytestream= pbbak + p_len;
- set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
- memcpy(s->block_state, p_state, sizeof(s->block_state));
- return score;
- }
-}
-
-static void encode_q_branch2(SnowContext *s, int level, int x, int y){
- const int w= s->b_width << s->block_max_depth;
- const int rem_depth= s->block_max_depth - level;
- const int index= (x + y*w) << rem_depth;
- int trx= (x+1)<<rem_depth;
- BlockNode *b= &s->block[index];
- const BlockNode *left = x ? &s->block[index-1] : &null_block;
- const BlockNode *top = y ? &s->block[index-w] : &null_block;
- const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
- const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
- int pl = left->color[0];
- int pcb= left->color[1];
- int pcr= left->color[2];
- int pmx, pmy;
- int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
- int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
- int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
- int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
-
- if(s->keyframe){
- set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
- return;
- }
-
- if(level!=s->block_max_depth){
- if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
- put_rac(&s->c, &s->block_state[4 + s_context], 1);
- }else{
- put_rac(&s->c, &s->block_state[4 + s_context], 0);
- encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
- encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
- encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
- encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
- return;
- }
- }
- if(b->type & BLOCK_INTRA){
- pred_mv(s, &pmx, &pmy, 0, left, top, tr);
- put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
- put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
- put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
- put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
- set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
- }else{
- pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
- put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
- if(s->ref_frames > 1)
- put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
- put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
- put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
- set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
- }
-}
-
-static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
- int i, x2, y2;
- Plane *p= &s->plane[plane_index];
- const int block_size = MB_SIZE >> s->block_max_depth;
- const int block_w = plane_index ? block_size/2 : block_size;
- const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
- const int obmc_stride= plane_index ? block_size : 2*block_size;
- const int ref_stride= s->current_picture.linesize[plane_index];
- uint8_t *src= s-> input_picture.data[plane_index];
- IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
- const int b_stride = s->b_width << s->block_max_depth;
- const int w= p->width;
- const int h= p->height;
- int index= mb_x + mb_y*b_stride;
- BlockNode *b= &s->block[index];
- BlockNode backup= *b;
- int ab=0;
- int aa=0;
-
- b->type|= BLOCK_INTRA;
- b->color[plane_index]= 0;
- memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
-
- for(i=0; i<4; i++){
- int mb_x2= mb_x + (i &1) - 1;
- int mb_y2= mb_y + (i>>1) - 1;
- int x= block_w*mb_x2 + block_w/2;
- int y= block_w*mb_y2 + block_w/2;
-
- add_yblock(s, 0, NULL, dst + ((i&1)+(i>>1)*obmc_stride)*block_w, NULL, obmc,
- x, y, block_w, block_w, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
-
- for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_w); y2++){
- for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
- int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_w*mb_y - block_w/2))*obmc_stride;
- int obmc_v= obmc[index];
- int d;
- if(y<0) obmc_v += obmc[index + block_w*obmc_stride];
- if(x<0) obmc_v += obmc[index + block_w];
- if(y+block_w>h) obmc_v += obmc[index - block_w*obmc_stride];
- if(x+block_w>w) obmc_v += obmc[index - block_w];
- //FIXME precalculate this or simplify it somehow else
-
- d = -dst[index] + (1<<(FRAC_BITS-1));
- dst[index] = d;
- ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
- aa += obmc_v * obmc_v; //FIXME precalculate this
- }
- }
- }
- *b= backup;
-
- return av_clip(((ab<<LOG2_OBMC_MAX) + aa/2)/aa, 0, 255); //FIXME we should not need clipping
-}
-
-static inline int get_block_bits(SnowContext *s, int x, int y, int w){
- const int b_stride = s->b_width << s->block_max_depth;
- const int b_height = s->b_height<< s->block_max_depth;
- int index= x + y*b_stride;
- const BlockNode *b = &s->block[index];
- const BlockNode *left = x ? &s->block[index-1] : &null_block;
- const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
- const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
- const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
- int dmx, dmy;
-// int mx_context= av_log2(2*FFABS(left->mx - top->mx));
-// int my_context= av_log2(2*FFABS(left->my - top->my));
-
- if(x<0 || x>=b_stride || y>=b_height)
- return 0;
-/*
-1 0 0
-01X 1-2 1
-001XX 3-6 2-3
-0001XXX 7-14 4-7
-00001XXXX 15-30 8-15
-*/
-//FIXME try accurate rate
-//FIXME intra and inter predictors if surrounding blocks are not the same type
- if(b->type & BLOCK_INTRA){
- return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
- + av_log2(2*FFABS(left->color[1] - b->color[1]))
- + av_log2(2*FFABS(left->color[2] - b->color[2])));
- }else{
- pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
- dmx-= b->mx;
- dmy-= b->my;
- return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
- + av_log2(2*FFABS(dmy))
- + av_log2(2*b->ref));
- }
-}
-
-static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, const uint8_t *obmc_edged){
- Plane *p= &s->plane[plane_index];
- const int block_size = MB_SIZE >> s->block_max_depth;
- const int block_w = plane_index ? block_size/2 : block_size;
- const int obmc_stride= plane_index ? block_size : 2*block_size;
- const int ref_stride= s->current_picture.linesize[plane_index];
- uint8_t *dst= s->current_picture.data[plane_index];
- uint8_t *src= s-> input_picture.data[plane_index];
- IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
- uint8_t *cur = s->scratchbuf;
- uint8_t tmp[ref_stride*(2*MB_SIZE+HTAPS_MAX-1)];
- const int b_stride = s->b_width << s->block_max_depth;
- const int b_height = s->b_height<< s->block_max_depth;
- const int w= p->width;
- const int h= p->height;
- int distortion;
- int rate= 0;
- const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
- int sx= block_w*mb_x - block_w/2;
- int sy= block_w*mb_y - block_w/2;
- int x0= FFMAX(0,-sx);
- int y0= FFMAX(0,-sy);
- int x1= FFMIN(block_w*2, w-sx);
- int y1= FFMIN(block_w*2, h-sy);
- int i,x,y;
-
- pred_block(s, cur, tmp, ref_stride, sx, sy, block_w*2, block_w*2, &s->block[mb_x + mb_y*b_stride], plane_index, w, h);
-
- for(y=y0; y<y1; y++){
- const uint8_t *obmc1= obmc_edged + y*obmc_stride;
- const IDWTELEM *pred1 = pred + y*obmc_stride;
- uint8_t *cur1 = cur + y*ref_stride;
- uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
- for(x=x0; x<x1; x++){
-#if FRAC_BITS >= LOG2_OBMC_MAX
- int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
-#else
- int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
-#endif
- v = (v + pred1[x]) >> FRAC_BITS;
- if(v&(~255)) v= ~(v>>31);
- dst1[x] = v;
- }
- }
-
- /* copy the regions where obmc[] = (uint8_t)256 */
- if(LOG2_OBMC_MAX == 8
- && (mb_x == 0 || mb_x == b_stride-1)
- && (mb_y == 0 || mb_y == b_height-1)){
- if(mb_x == 0)
- x1 = block_w;
- else
- x0 = block_w;
- if(mb_y == 0)
- y1 = block_w;
- else
- y0 = block_w;
- for(y=y0; y<y1; y++)
- memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
- }
-
- if(block_w==16){
- /* FIXME rearrange dsputil to fit 32x32 cmp functions */
- /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
- /* FIXME cmps overlap but do not cover the wavelet's whole support.
- * So improving the score of one block is not strictly guaranteed
- * to improve the score of the whole frame, thus iterative motion
- * estimation does not always converge. */
- if(s->avctx->me_cmp == FF_CMP_W97)
- distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
- else if(s->avctx->me_cmp == FF_CMP_W53)
- distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
- else{
- distortion = 0;
- for(i=0; i<4; i++){
- int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
- distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
- }
- }
- }else{
- assert(block_w==8);
- distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
- }
-
- if(plane_index==0){
- for(i=0; i<4; i++){
-/* ..RRr
- * .RXx.
- * rxx..
- */
- rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
- }
- if(mb_x == b_stride-2)
- rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
- }
- return distortion + rate*penalty_factor;
-}
-
-static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
- int i, y2;
- Plane *p= &s->plane[plane_index];
- const int block_size = MB_SIZE >> s->block_max_depth;
- const int block_w = plane_index ? block_size/2 : block_size;
- const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
- const int obmc_stride= plane_index ? block_size : 2*block_size;
- const int ref_stride= s->current_picture.linesize[plane_index];
- uint8_t *dst= s->current_picture.data[plane_index];
- uint8_t *src= s-> input_picture.data[plane_index];
- //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
- // const has only been removed from zero_dst to suppress a warning
- static IDWTELEM zero_dst[4096]; //FIXME
- const int b_stride = s->b_width << s->block_max_depth;
- const int w= p->width;
- const int h= p->height;
- int distortion= 0;
- int rate= 0;
- const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
-
- for(i=0; i<9; i++){
- int mb_x2= mb_x + (i%3) - 1;
- int mb_y2= mb_y + (i/3) - 1;
- int x= block_w*mb_x2 + block_w/2;
- int y= block_w*mb_y2 + block_w/2;
-
- add_yblock(s, 0, NULL, zero_dst, dst, obmc,
- x, y, block_w, block_w, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
-
- //FIXME find a cleaner/simpler way to skip the outside stuff
- for(y2= y; y2<0; y2++)
- memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
- for(y2= h; y2<y+block_w; y2++)
- memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
- if(x<0){
- for(y2= y; y2<y+block_w; y2++)
- memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
- }
- if(x+block_w > w){
- for(y2= y; y2<y+block_w; y2++)
- memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
- }
-
- assert(block_w== 8 || block_w==16);
- distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_w);
- }
-
- if(plane_index==0){
- BlockNode *b= &s->block[mb_x+mb_y*b_stride];
- int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
-
-/* ..RRRr
- * .RXXx.
- * .RXXx.
- * rxxx.
- */
- if(merged)
- rate = get_block_bits(s, mb_x, mb_y, 2);
- for(i=merged?4:0; i<9; i++){
- static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
- rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
- }
- }
- return distortion + rate*penalty_factor;
-}
-
-static int encode_subband_c0run(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
- const int w= b->width;
- const int h= b->height;
- int x, y;
-
- if(1){
- int run=0;
- int runs[w*h];
- int run_index=0;
- int max_index;
-
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- int v, p=0;
- int /*ll=0, */l=0, lt=0, t=0, rt=0;
- v= src[x + y*stride];
-
- if(y){
- t= src[x + (y-1)*stride];
- if(x){
- lt= src[x - 1 + (y-1)*stride];
- }
- if(x + 1 < w){
- rt= src[x + 1 + (y-1)*stride];
- }
- }
- if(x){
- l= src[x - 1 + y*stride];
- /*if(x > 1){
- if(orientation==1) ll= src[y + (x-2)*stride];
- else ll= src[x - 2 + y*stride];
- }*/
- }
- if(parent){
- int px= x>>1;
- int py= y>>1;
- if(px<b->parent->width && py<b->parent->height)
- p= parent[px + py*2*stride];
- }
- if(!(/*ll|*/l|lt|t|rt|p)){
- if(v){
- runs[run_index++]= run;
- run=0;
- }else{
- run++;
- }
- }
- }
- }
- max_index= run_index;
- runs[run_index++]= run;
- run_index=0;
- run= runs[run_index++];
-
- put_symbol2(&s->c, b->state[30], max_index, 0);
- if(run_index <= max_index)
- put_symbol2(&s->c, b->state[1], run, 3);
-
- for(y=0; y<h; y++){
- if(s->c.bytestream_end - s->c.bytestream < w*40){
- av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
- }
- for(x=0; x<w; x++){
- int v, p=0;
- int /*ll=0, */l=0, lt=0, t=0, rt=0;
- v= src[x + y*stride];
-
- if(y){
- t= src[x + (y-1)*stride];
- if(x){
- lt= src[x - 1 + (y-1)*stride];
- }
- if(x + 1 < w){
- rt= src[x + 1 + (y-1)*stride];
- }
- }
- if(x){
- l= src[x - 1 + y*stride];
- /*if(x > 1){
- if(orientation==1) ll= src[y + (x-2)*stride];
- else ll= src[x - 2 + y*stride];
- }*/
- }
- if(parent){
- int px= x>>1;
- int py= y>>1;
- if(px<b->parent->width && py<b->parent->height)
- p= parent[px + py*2*stride];
- }
- if(/*ll|*/l|lt|t|rt|p){
- int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
-
- put_rac(&s->c, &b->state[0][context], !!v);
- }else{
- if(!run){
- run= runs[run_index++];
-
- if(run_index <= max_index)
- put_symbol2(&s->c, b->state[1], run, 3);
- assert(v);
- }else{
- run--;
- assert(!v);
- }
- }
- if(v){
- int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
- int l2= 2*FFABS(l) + (l<0);
- int t2= 2*FFABS(t) + (t<0);
-
- put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
- put_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l2&0xFF] + 3*quant3bA[t2&0xFF]], v<0);
- }
- }
- }
- }
- return 0;
-}
-
-static int encode_subband(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
-// encode_subband_qtree(s, b, src, parent, stride, orientation);
-// encode_subband_z0run(s, b, src, parent, stride, orientation);
- return encode_subband_c0run(s, b, src, parent, stride, orientation);
-// encode_subband_dzr(s, b, src, parent, stride, orientation);
-}
-
-static av_always_inline int check_block(SnowContext *s, int mb_x, int mb_y, int p[3], int intra, const uint8_t *obmc_edged, int *best_rd){
- const int b_stride= s->b_width << s->block_max_depth;
- BlockNode *block= &s->block[mb_x + mb_y * b_stride];
- BlockNode backup= *block;
- int rd, index, value;
-
- assert(mb_x>=0 && mb_y>=0);
- assert(mb_x<b_stride);
-
- if(intra){
- block->color[0] = p[0];
- block->color[1] = p[1];
- block->color[2] = p[2];
- block->type |= BLOCK_INTRA;
- }else{
- index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
- value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
- if(s->me_cache[index] == value)
- return 0;
- s->me_cache[index]= value;
-
- block->mx= p[0];
- block->my= p[1];
- block->type &= ~BLOCK_INTRA;
- }
-
- rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
-
-//FIXME chroma
- if(rd < *best_rd){
- *best_rd= rd;
- return 1;
- }else{
- *block= backup;
- return 0;
- }
-}
-
-/* special case for int[2] args we discard afterwards,
- * fixes compilation problem with gcc 2.95 */
-static av_always_inline int check_block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, const uint8_t *obmc_edged, int *best_rd){
- int p[2] = {p0, p1};
- return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
-}
-
-static av_always_inline int check_4block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, int ref, int *best_rd){
- const int b_stride= s->b_width << s->block_max_depth;
- BlockNode *block= &s->block[mb_x + mb_y * b_stride];
- BlockNode backup[4]= {block[0], block[1], block[b_stride], block[b_stride+1]};
- int rd, index, value;
-
- assert(mb_x>=0 && mb_y>=0);
- assert(mb_x<b_stride);
- assert(((mb_x|mb_y)&1) == 0);
-
- index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
- value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
- if(s->me_cache[index] == value)
- return 0;
- s->me_cache[index]= value;
-
- block->mx= p0;
- block->my= p1;
- block->ref= ref;
- block->type &= ~BLOCK_INTRA;
- block[1]= block[b_stride]= block[b_stride+1]= *block;
-
- rd= get_4block_rd(s, mb_x, mb_y, 0);
-
-//FIXME chroma
- if(rd < *best_rd){
- *best_rd= rd;
- return 1;
- }else{
- block[0]= backup[0];
- block[1]= backup[1];
- block[b_stride]= backup[2];
- block[b_stride+1]= backup[3];
- return 0;
- }
-}
-
-static void iterative_me(SnowContext *s){
- int pass, mb_x, mb_y;
- const int b_width = s->b_width << s->block_max_depth;
- const int b_height= s->b_height << s->block_max_depth;
- const int b_stride= b_width;
- int color[3];
-
- {
- RangeCoder r = s->c;
- uint8_t state[sizeof(s->block_state)];
- memcpy(state, s->block_state, sizeof(s->block_state));
- for(mb_y= 0; mb_y<s->b_height; mb_y++)
- for(mb_x= 0; mb_x<s->b_width; mb_x++)
- encode_q_branch(s, 0, mb_x, mb_y);
- s->c = r;
- memcpy(s->block_state, state, sizeof(s->block_state));
- }
-
- for(pass=0; pass<25; pass++){
- int change= 0;
-
- for(mb_y= 0; mb_y<b_height; mb_y++){
- for(mb_x= 0; mb_x<b_width; mb_x++){
- int dia_change, i, j, ref;
- int best_rd= INT_MAX, ref_rd;
- BlockNode backup, ref_b;
- const int index= mb_x + mb_y * b_stride;
- BlockNode *block= &s->block[index];
- BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
- BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
- BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
- BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
- BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
- BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
- BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
- BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
- const int b_w= (MB_SIZE >> s->block_max_depth);
- uint8_t obmc_edged[b_w*2][b_w*2];
-
- if(pass && (block->type & BLOCK_OPT))
- continue;
- block->type |= BLOCK_OPT;
-
- backup= *block;
-
- if(!s->me_cache_generation)
- memset(s->me_cache, 0, sizeof(s->me_cache));
- s->me_cache_generation += 1<<22;
-
- //FIXME precalculate
- {
- int x, y;
- memcpy(obmc_edged, obmc_tab[s->block_max_depth], b_w*b_w*4);
- if(mb_x==0)
- for(y=0; y<b_w*2; y++)
- memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
- if(mb_x==b_stride-1)
- for(y=0; y<b_w*2; y++)
- memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
- if(mb_y==0){
- for(x=0; x<b_w*2; x++)
- obmc_edged[0][x] += obmc_edged[b_w-1][x];
- for(y=1; y<b_w; y++)
- memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
- }
- if(mb_y==b_height-1){
- for(x=0; x<b_w*2; x++)
- obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
- for(y=b_w; y<b_w*2-1; y++)
- memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
- }
- }
-
- //skip stuff outside the picture
- if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
- uint8_t *src= s-> input_picture.data[0];
- uint8_t *dst= s->current_picture.data[0];
- const int stride= s->current_picture.linesize[0];
- const int block_w= MB_SIZE >> s->block_max_depth;
- const int sx= block_w*mb_x - block_w/2;
- const int sy= block_w*mb_y - block_w/2;
- const int w= s->plane[0].width;
- const int h= s->plane[0].height;
- int y;
-
- for(y=sy; y<0; y++)
- memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
- for(y=h; y<sy+block_w*2; y++)
- memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
- if(sx<0){
- for(y=sy; y<sy+block_w*2; y++)
- memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
- }
- if(sx+block_w*2 > w){
- for(y=sy; y<sy+block_w*2; y++)
- memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
- }
- }
-
- // intra(black) = neighbors' contribution to the current block
- for(i=0; i<3; i++)
- color[i]= get_dc(s, mb_x, mb_y, i);
-
- // get previous score (cannot be cached due to OBMC)
- if(pass > 0 && (block->type&BLOCK_INTRA)){
- int color0[3]= {block->color[0], block->color[1], block->color[2]};
- check_block(s, mb_x, mb_y, color0, 1, *obmc_edged, &best_rd);
- }else
- check_block_inter(s, mb_x, mb_y, block->mx, block->my, *obmc_edged, &best_rd);
-
- ref_b= *block;
- ref_rd= best_rd;
- for(ref=0; ref < s->ref_frames; ref++){
- int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
- if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
- continue;
- block->ref= ref;
- best_rd= INT_MAX;
-
- check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], *obmc_edged, &best_rd);
- check_block_inter(s, mb_x, mb_y, 0, 0, *obmc_edged, &best_rd);
- if(tb)
- check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], *obmc_edged, &best_rd);
- if(lb)
- check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], *obmc_edged, &best_rd);
- if(rb)
- check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], *obmc_edged, &best_rd);
- if(bb)
- check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], *obmc_edged, &best_rd);
-
- /* fullpel ME */
- //FIXME avoid subpel interpolation / round to nearest integer
- do{
- dia_change=0;
- for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
- for(j=0; j<i; j++){
- dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
- dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
- dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
- dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
- }
- }
- }while(dia_change);
- /* subpel ME */
- do{
- static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
- dia_change=0;
- for(i=0; i<8; i++)
- dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], *obmc_edged, &best_rd);
- }while(dia_change);
- //FIXME or try the standard 2 pass qpel or similar
-
- mvr[0][0]= block->mx;
- mvr[0][1]= block->my;
- if(ref_rd > best_rd){
- ref_rd= best_rd;
- ref_b= *block;
- }
- }
- best_rd= ref_rd;
- *block= ref_b;
- check_block(s, mb_x, mb_y, color, 1, *obmc_edged, &best_rd);
- //FIXME RD style color selection
- if(!same_block(block, &backup)){
- if(tb ) tb ->type &= ~BLOCK_OPT;
- if(lb ) lb ->type &= ~BLOCK_OPT;
- if(rb ) rb ->type &= ~BLOCK_OPT;
- if(bb ) bb ->type &= ~BLOCK_OPT;
- if(tlb) tlb->type &= ~BLOCK_OPT;
- if(trb) trb->type &= ~BLOCK_OPT;
- if(blb) blb->type &= ~BLOCK_OPT;
- if(brb) brb->type &= ~BLOCK_OPT;
- change ++;
- }
- }
- }
- av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
- if(!change)
- break;
- }
-
- if(s->block_max_depth == 1){
- int change= 0;
- for(mb_y= 0; mb_y<b_height; mb_y+=2){
- for(mb_x= 0; mb_x<b_width; mb_x+=2){
- int i;
- int best_rd, init_rd;
- const int index= mb_x + mb_y * b_stride;
- BlockNode *b[4];
-
- b[0]= &s->block[index];
- b[1]= b[0]+1;
- b[2]= b[0]+b_stride;
- b[3]= b[2]+1;
- if(same_block(b[0], b[1]) &&
- same_block(b[0], b[2]) &&
- same_block(b[0], b[3]))
- continue;
-
- if(!s->me_cache_generation)
- memset(s->me_cache, 0, sizeof(s->me_cache));
- s->me_cache_generation += 1<<22;
-
- init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
-
- //FIXME more multiref search?
- check_4block_inter(s, mb_x, mb_y,
- (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
- (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
-
- for(i=0; i<4; i++)
- if(!(b[i]->type&BLOCK_INTRA))
- check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
-
- if(init_rd != best_rd)
- change++;
- }
- }
- av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
- }
-}
-
-static void encode_blocks(SnowContext *s, int search){
- int x, y;
- int w= s->b_width;
- int h= s->b_height;
-
- if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
- iterative_me(s);
-
- for(y=0; y<h; y++){
- if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
- av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return;
- }
- for(x=0; x<w; x++){
- if(s->avctx->me_method == ME_ITER || !search)
- encode_q_branch2(s, 0, x, y);
- else
- encode_q_branch (s, 0, x, y);
- }
- }
-}
-
-static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
- const int w= b->width;
- const int h= b->height;
- const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
- const int qmul= qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
- int x,y, thres1, thres2;
-
- if(s->qlog == LOSSLESS_QLOG){
- for(y=0; y<h; y++)
- for(x=0; x<w; x++)
- dst[x + y*stride]= src[x + y*stride];
- return;
- }
-
- bias= bias ? 0 : (3*qmul)>>3;
- thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
- thres2= 2*thres1;
-
- if(!bias){
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- int i= src[x + y*stride];
-
- if((unsigned)(i+thres1) > thres2){
- if(i>=0){
- i<<= QEXPSHIFT;
- i/= qmul; //FIXME optimize
- dst[x + y*stride]= i;
- }else{
- i= -i;
- i<<= QEXPSHIFT;
- i/= qmul; //FIXME optimize
- dst[x + y*stride]= -i;
- }
- }else
- dst[x + y*stride]= 0;
- }
- }
- }else{
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- int i= src[x + y*stride];
-
- if((unsigned)(i+thres1) > thres2){
- if(i>=0){
- i<<= QEXPSHIFT;
- i= (i + bias) / qmul; //FIXME optimize
- dst[x + y*stride]= i;
- }else{
- i= -i;
- i<<= QEXPSHIFT;
- i= (i + bias) / qmul; //FIXME optimize
- dst[x + y*stride]= -i;
- }
- }else
- dst[x + y*stride]= 0;
- }
- }
- }
-}
-
-static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
- const int w= b->width;
- const int h= b->height;
- const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
- const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
- const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
- int x,y;
-
- if(s->qlog == LOSSLESS_QLOG) return;
-
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- int i= src[x + y*stride];
- if(i<0){
- src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
- }else if(i>0){
- src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
- }
- }
- }
-}
-
-static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
- const int w= b->width;
- const int h= b->height;
- int x,y;
-
- for(y=h-1; y>=0; y--){
- for(x=w-1; x>=0; x--){
- int i= x + y*stride;
-
- if(x){
- if(use_median){
- if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
- else src[i] -= src[i - 1];
- }else{
- if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
- else src[i] -= src[i - 1];
- }
- }else{
- if(y) src[i] -= src[i - stride];
- }
- }
- }
-}
-
-static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
- const int w= b->width;
- const int h= b->height;
- int x,y;
-
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- int i= x + y*stride;
-
- if(x){
- if(use_median){
- if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
- else src[i] += src[i - 1];
- }else{
- if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
- else src[i] += src[i - 1];
- }
- }else{
- if(y) src[i] += src[i - stride];
- }
- }
- }
-}
-
-static void encode_qlogs(SnowContext *s){
- int plane_index, level, orientation;
-
- for(plane_index=0; plane_index<2; plane_index++){
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1:0; orientation<4; orientation++){
- if(orientation==2) continue;
- put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
- }
- }
- }
-}
-
-static void encode_header(SnowContext *s){
- int plane_index, i;
- uint8_t kstate[32];
-
- memset(kstate, MID_STATE, sizeof(kstate));
-
- put_rac(&s->c, kstate, s->keyframe);
- if(s->keyframe || s->always_reset){
- reset_contexts(s);
- s->last_spatial_decomposition_type=
- s->last_qlog=
- s->last_qbias=
- s->last_mv_scale=
- s->last_block_max_depth= 0;
- for(plane_index=0; plane_index<2; plane_index++){
- Plane *p= &s->plane[plane_index];
- p->last_htaps=0;
- p->last_diag_mc=0;
- memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
- }
- }
- if(s->keyframe){
- put_symbol(&s->c, s->header_state, s->version, 0);
- put_rac(&s->c, s->header_state, s->always_reset);
- put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
- put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
- put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
- put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
- put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
- put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
- put_rac(&s->c, s->header_state, s->spatial_scalability);
-// put_rac(&s->c, s->header_state, s->rate_scalability);
- put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
-
- encode_qlogs(s);
- }
-
- if(!s->keyframe){
- int update_mc=0;
- for(plane_index=0; plane_index<2; plane_index++){
- Plane *p= &s->plane[plane_index];
- update_mc |= p->last_htaps != p->htaps;
- update_mc |= p->last_diag_mc != p->diag_mc;
- update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
- }
- put_rac(&s->c, s->header_state, update_mc);
- if(update_mc){
- for(plane_index=0; plane_index<2; plane_index++){
- Plane *p= &s->plane[plane_index];
- put_rac(&s->c, s->header_state, p->diag_mc);
- put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
- for(i= p->htaps/2; i; i--)
- put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
- }
- }
- if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
- put_rac(&s->c, s->header_state, 1);
- put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
- encode_qlogs(s);
- }else
- put_rac(&s->c, s->header_state, 0);
- }
-
- put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
- put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
- put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
- put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
- put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
-
-}
-
-static void update_last_header_values(SnowContext *s){
- int plane_index;
-
- if(!s->keyframe){
- for(plane_index=0; plane_index<2; plane_index++){
- Plane *p= &s->plane[plane_index];
- p->last_diag_mc= p->diag_mc;
- p->last_htaps = p->htaps;
- memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
- }
- }
-
- s->last_spatial_decomposition_type = s->spatial_decomposition_type;
- s->last_qlog = s->qlog;
- s->last_qbias = s->qbias;
- s->last_mv_scale = s->mv_scale;
- s->last_block_max_depth = s->block_max_depth;
- s->last_spatial_decomposition_count = s->spatial_decomposition_count;
-}
-
-static int qscale2qlog(int qscale){
- return rint(QROOT*log(qscale / (float)FF_QP2LAMBDA)/log(2))
- + 61*QROOT/8; ///< 64 > 60
-}
-
-static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
-{
- /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
- * FIXME we know exact mv bits at this point,
- * but ratecontrol isn't set up to include them. */
- uint32_t coef_sum= 0;
- int level, orientation, delta_qlog;
-
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &s->plane[0].band[level][orientation];
- IDWTELEM *buf= b->ibuf;
- const int w= b->width;
- const int h= b->height;
- const int stride= b->stride;
- const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
- const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
- const int qdiv= (1<<16)/qmul;
- int x, y;
- //FIXME this is ugly
- for(y=0; y<h; y++)
- for(x=0; x<w; x++)
- buf[x+y*stride]= b->buf[x+y*stride];
- if(orientation==0)
- decorrelate(s, b, buf, stride, 1, 0);
- for(y=0; y<h; y++)
- for(x=0; x<w; x++)
- coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
- }
- }
-
- /* ugly, ratecontrol just takes a sqrt again */
- coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
- assert(coef_sum < INT_MAX);
-
- if(pict->pict_type == AV_PICTURE_TYPE_I){
- s->m.current_picture.mb_var_sum= coef_sum;
- s->m.current_picture.mc_mb_var_sum= 0;
- }else{
- s->m.current_picture.mc_mb_var_sum= coef_sum;
- s->m.current_picture.mb_var_sum= 0;
- }
-
- pict->quality= ff_rate_estimate_qscale(&s->m, 1);
- if (pict->quality < 0)
- return INT_MIN;
- s->lambda= pict->quality * 3/2;
- delta_qlog= qscale2qlog(pict->quality) - s->qlog;
- s->qlog+= delta_qlog;
- return delta_qlog;
-}
-
-static void calculate_visual_weight(SnowContext *s, Plane *p){
- int width = p->width;
- int height= p->height;
- int level, orientation, x, y;
-
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &p->band[level][orientation];
- IDWTELEM *ibuf= b->ibuf;
- int64_t error=0;
-
- memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
- ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
- ff_spatial_idwt(s->spatial_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
- for(y=0; y<height; y++){
- for(x=0; x<width; x++){
- int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
- error += d*d;
- }
- }
-
- b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
- }
- }
-}
-
-static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
- SnowContext *s = avctx->priv_data;
- RangeCoder * const c= &s->c;
- AVFrame *pict = data;
- const int width= s->avctx->width;
- const int height= s->avctx->height;
- int level, orientation, plane_index, i, y;
- uint8_t rc_header_bak[sizeof(s->header_state)];
- uint8_t rc_block_bak[sizeof(s->block_state)];
-
- ff_init_range_encoder(c, buf, buf_size);
- ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
-
- for(i=0; i<3; i++){
- int shift= !!i;
- for(y=0; y<(height>>shift); y++)
- memcpy(&s->input_picture.data[i][y * s->input_picture.linesize[i]],
- &pict->data[i][y * pict->linesize[i]],
- width>>shift);
- }
- s->new_picture = *pict;
-
- s->m.picture_number= avctx->frame_number;
- if(avctx->flags&CODEC_FLAG_PASS2){
- s->m.pict_type =
- pict->pict_type= s->m.rc_context.entry[avctx->frame_number].new_pict_type;
- s->keyframe= pict->pict_type==AV_PICTURE_TYPE_I;
- if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
- pict->quality= ff_rate_estimate_qscale(&s->m, 0);
- if (pict->quality < 0)
- return -1;
- }
- }else{
- s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
- s->m.pict_type=
- pict->pict_type= s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
- }
-
- if(s->pass1_rc && avctx->frame_number == 0)
- pict->quality= 2*FF_QP2LAMBDA;
- if(pict->quality){
- s->qlog= qscale2qlog(pict->quality);
- s->lambda = pict->quality * 3/2;
- }
- if(s->qlog < 0 || (!pict->quality && (avctx->flags & CODEC_FLAG_QSCALE))){
- s->qlog= LOSSLESS_QLOG;
- s->lambda = 0;
- }//else keep previous frame's qlog until after motion estimation
-
- frame_start(s);
-
- s->m.current_picture_ptr= &s->m.current_picture;
- s->m.last_picture.f.pts = s->m.current_picture.f.pts;
- s->m.current_picture.f.pts = pict->pts;
- if(pict->pict_type == AV_PICTURE_TYPE_P){
- int block_width = (width +15)>>4;
- int block_height= (height+15)>>4;
- int stride= s->current_picture.linesize[0];
-
- assert(s->current_picture.data[0]);
- assert(s->last_picture[0].data[0]);
-
- s->m.avctx= s->avctx;
- s->m.current_picture.f.data[0] = s->current_picture.data[0];
- s->m. last_picture.f.data[0] = s->last_picture[0].data[0];
- s->m. new_picture.f.data[0] = s-> input_picture.data[0];
- s->m. last_picture_ptr= &s->m. last_picture;
- s->m.linesize=
- s->m. last_picture.f.linesize[0] =
- s->m. new_picture.f.linesize[0] =
- s->m.current_picture.f.linesize[0] = stride;
- s->m.uvlinesize= s->current_picture.linesize[1];
- s->m.width = width;
- s->m.height= height;
- s->m.mb_width = block_width;
- s->m.mb_height= block_height;
- s->m.mb_stride= s->m.mb_width+1;
- s->m.b8_stride= 2*s->m.mb_width+1;
- s->m.f_code=1;
- s->m.pict_type= pict->pict_type;
- s->m.me_method= s->avctx->me_method;
- s->m.me.scene_change_score=0;
- s->m.flags= s->avctx->flags;
- s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
- s->m.out_format= FMT_H263;
- s->m.unrestricted_mv= 1;
-
- s->m.lambda = s->lambda;
- s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
- s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
-
- s->m.dsp= s->dsp; //move
- ff_init_me(&s->m);
- s->dsp= s->m.dsp;
- }
-
- if(s->pass1_rc){
- memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
- memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
- }
-
-redo_frame:
-
- if(pict->pict_type == AV_PICTURE_TYPE_I)
- s->spatial_decomposition_count= 5;
- else
- s->spatial_decomposition_count= 5;
-
- s->m.pict_type = pict->pict_type;
- s->qbias= pict->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
-
- common_init_after_header(avctx);
-
- if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
- for(plane_index=0; plane_index<3; plane_index++){
- calculate_visual_weight(s, &s->plane[plane_index]);
- }
- }
-
- encode_header(s);
- s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
- encode_blocks(s, 1);
- s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
-
- for(plane_index=0; plane_index<3; plane_index++){
- Plane *p= &s->plane[plane_index];
- int w= p->width;
- int h= p->height;
- int x, y;
-// int bits= put_bits_count(&s->c.pb);
-
- if (!s->memc_only) {
- //FIXME optimize
- if(pict->data[plane_index]) //FIXME gray hack
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
- }
- }
- predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
-
- if( plane_index==0
- && pict->pict_type == AV_PICTURE_TYPE_P
- && !(avctx->flags&CODEC_FLAG_PASS2)
- && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
- ff_init_range_encoder(c, buf, buf_size);
- ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
- pict->pict_type= AV_PICTURE_TYPE_I;
- s->keyframe=1;
- s->current_picture.key_frame=1;
- goto redo_frame;
- }
-
- if(s->qlog == LOSSLESS_QLOG){
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
- }
- }
- }else{
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
- }
- }
- }
-
- /* if(QUANTIZE2)
- dwt_quantize(s, p, s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type);
- else*/
- ff_spatial_dwt(s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
-
- if(s->pass1_rc && plane_index==0){
- int delta_qlog = ratecontrol_1pass(s, pict);
- if (delta_qlog <= INT_MIN)
- return -1;
- if(delta_qlog){
- //reordering qlog in the bitstream would eliminate this reset
- ff_init_range_encoder(c, buf, buf_size);
- memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
- memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
- encode_header(s);
- encode_blocks(s, 0);
- }
- }
-
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &p->band[level][orientation];
-
- if(!QUANTIZE2)
- quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
- if(orientation==0)
- decorrelate(s, b, b->ibuf, b->stride, pict->pict_type == AV_PICTURE_TYPE_P, 0);
- encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
- assert(b->parent==NULL || b->parent->stride == b->stride*2);
- if(orientation==0)
- correlate(s, b, b->ibuf, b->stride, 1, 0);
- }
- }
-
- for(level=0; level<s->spatial_decomposition_count; level++){
- for(orientation=level ? 1 : 0; orientation<4; orientation++){
- SubBand *b= &p->band[level][orientation];
-
- dequantize(s, b, b->ibuf, b->stride);
- }
- }
-
- ff_spatial_idwt(s->spatial_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
- if(s->qlog == LOSSLESS_QLOG){
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
- }
- }
- }
- predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
- }else{
- //ME/MC only
- if(pict->pict_type == AV_PICTURE_TYPE_I){
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x]=
- pict->data[plane_index][y*pict->linesize[plane_index] + x];
- }
- }
- }else{
- memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
- predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
- }
- }
- if(s->avctx->flags&CODEC_FLAG_PSNR){
- int64_t error= 0;
-
- if(pict->data[plane_index]) //FIXME gray hack
- for(y=0; y<h; y++){
- for(x=0; x<w; x++){
- int d= s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x] - pict->data[plane_index][y*pict->linesize[plane_index] + x];
- error += d*d;
- }
- }
- s->avctx->error[plane_index] += error;
- s->current_picture.error[plane_index] = error;
- }
-
- }
-
- update_last_header_values(s);
-
- release_buffer(avctx);
-
- s->current_picture.coded_picture_number = avctx->frame_number;
- s->current_picture.pict_type = pict->pict_type;
- s->current_picture.quality = pict->quality;
- s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
- s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
- s->m.current_picture.f.display_picture_number =
- s->m.current_picture.f.coded_picture_number = avctx->frame_number;
- s->m.current_picture.f.quality = pict->quality;
- s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
- if(s->pass1_rc)
- if (ff_rate_estimate_qscale(&s->m, 0) < 0)
- return -1;
- if(avctx->flags&CODEC_FLAG_PASS1)
- ff_write_pass1_stats(&s->m);
- s->m.last_pict_type = s->m.pict_type;
- avctx->frame_bits = s->m.frame_bits;
- avctx->mv_bits = s->m.mv_bits;
- avctx->misc_bits = s->m.misc_bits;
- avctx->p_tex_bits = s->m.p_tex_bits;
-
- emms_c();
-
- return ff_rac_terminate(c);
-}
-
-static av_cold int encode_end(AVCodecContext *avctx)
-{
- SnowContext *s = avctx->priv_data;
-
- common_end(s);
- if (s->input_picture.data[0])
- avctx->release_buffer(avctx, &s->input_picture);
- av_free(avctx->stats_out);
-
- return 0;
-}
-
-#define OFFSET(x) offsetof(SnowContext, x)
-#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
-static const AVOption options[] = {
- { "memc_only", "Only do ME/MC (I frames -> ref, P frame -> ME+MC).", OFFSET(memc_only), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
- { NULL },
-};
-
-static const AVClass snowenc_class = {
- .class_name = "snow encoder",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
-};
-
-AVCodec ff_snow_encoder = {
- .name = "snow",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = CODEC_ID_SNOW,
- .priv_data_size = sizeof(SnowContext),
- .init = encode_init,
- .encode = encode_frame,
- .close = encode_end,
- .long_name = NULL_IF_CONFIG_SMALL("Snow"),
- .priv_class = &snowenc_class,
-};
-#endif
diff --git a/libavcodec/snow.h b/libavcodec/snow.h
index db61b875c4..f43deb1d72 100644
--- a/libavcodec/snow.h
+++ b/libavcodec/snow.h
@@ -25,6 +25,10 @@
#include "dsputil.h"
#include "dwt.h"
+#include "rangecoder.h"
+#include "mathops.h"
+#include "mpegvideo.h"
+
#define MID_STATE 128
#define MAX_PLANES 4
@@ -36,6 +40,138 @@
#define LOG2_OBMC_MAX 8
#define OBMC_MAX (1<<(LOG2_OBMC_MAX))
+typedef struct BlockNode{
+ int16_t mx;
+ int16_t my;
+ uint8_t ref;
+ uint8_t color[3];
+ uint8_t type;
+//#define TYPE_SPLIT 1
+#define BLOCK_INTRA 1
+#define BLOCK_OPT 2
+//#define TYPE_NOCOLOR 4
+ uint8_t level; //FIXME merge into type?
+}BlockNode;
+
+static const BlockNode null_block= { //FIXME add border maybe
+ .color= {128,128,128},
+ .mx= 0,
+ .my= 0,
+ .ref= 0,
+ .type= 0,
+ .level= 0,
+};
+
+#define LOG2_MB_SIZE 4
+#define MB_SIZE (1<<LOG2_MB_SIZE)
+#define ENCODER_EXTRA_BITS 4
+#define HTAPS_MAX 8
+
+typedef struct x_and_coeff{
+ int16_t x;
+ uint16_t coeff;
+} x_and_coeff;
+
+typedef struct SubBand{
+ int level;
+ int stride;
+ int width;
+ int height;
+ int qlog; ///< log(qscale)/log[2^(1/6)]
+ DWTELEM *buf;
+ IDWTELEM *ibuf;
+ int buf_x_offset;
+ int buf_y_offset;
+ int stride_line; ///< Stride measured in lines, not pixels.
+ x_and_coeff * x_coeff;
+ struct SubBand *parent;
+ uint8_t state[/*7*2*/ 7 + 512][32];
+}SubBand;
+
+typedef struct Plane{
+ int width;
+ int height;
+ SubBand band[MAX_DECOMPOSITIONS][4];
+
+ int htaps;
+ int8_t hcoeff[HTAPS_MAX/2];
+ int diag_mc;
+ int fast_mc;
+
+ int last_htaps;
+ int8_t last_hcoeff[HTAPS_MAX/2];
+ int last_diag_mc;
+}Plane;
+
+typedef struct SnowContext{
+ AVClass *class;
+ AVCodecContext *avctx;
+ RangeCoder c;
+ DSPContext dsp;
+ DWTContext dwt;
+ AVFrame new_picture;
+ AVFrame input_picture; ///< new_picture with the internal linesizes
+ AVFrame current_picture;
+ AVFrame last_picture[MAX_REF_FRAMES];
+ uint8_t *halfpel_plane[MAX_REF_FRAMES][4][4];
+ AVFrame mconly_picture;
+// uint8_t q_context[16];
+ uint8_t header_state[32];
+ uint8_t block_state[128 + 32*128];
+ int keyframe;
+ int always_reset;
+ int version;
+ int spatial_decomposition_type;
+ int last_spatial_decomposition_type;
+ int temporal_decomposition_type;
+ int spatial_decomposition_count;
+ int last_spatial_decomposition_count;
+ int temporal_decomposition_count;
+ int max_ref_frames;
+ int ref_frames;
+ int16_t (*ref_mvs[MAX_REF_FRAMES])[2];
+ uint32_t *ref_scores[MAX_REF_FRAMES];
+ DWTELEM *spatial_dwt_buffer;
+ IDWTELEM *spatial_idwt_buffer;
+ int colorspace_type;
+ int chroma_h_shift;
+ int chroma_v_shift;
+ int spatial_scalability;
+ int qlog;
+ int last_qlog;
+ int lambda;
+ int lambda2;
+ int pass1_rc;
+ int mv_scale;
+ int last_mv_scale;
+ int qbias;
+ int last_qbias;
+#define QBIAS_SHIFT 3
+ int b_width;
+ int b_height;
+ int block_max_depth;
+ int last_block_max_depth;
+ Plane plane[MAX_PLANES];
+ BlockNode *block;
+#define ME_CACHE_SIZE 1024
+ int me_cache[ME_CACHE_SIZE];
+ int me_cache_generation;
+ slice_buffer sb;
+ int memc_only;
+
+ MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to eventually make the motion estimation independent of MpegEncContext, so this will be removed then (FIXME/XXX)
+
+ uint8_t *scratchbuf;
+}SnowContext;
+
+/* Tables */
+extern const uint8_t * const obmc_tab[4];
+#ifdef __sgi
+// Avoid a name clash on SGI IRIX
+#undef qexp
+#endif
+extern uint8_t qexp[QROOT];
+extern int scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES];
/* C bits used by mmx/sse2/altivec */
@@ -75,4 +211,482 @@ static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTE
}
}
+/* common code */
+
+int ff_snow_common_init(AVCodecContext *avctx);
+int ff_snow_common_init_after_header(AVCodecContext *avctx);
+void ff_snow_common_end(SnowContext *s);
+void ff_snow_release_buffer(AVCodecContext *avctx);
+void ff_snow_reset_contexts(SnowContext *s);
+int ff_snow_alloc_blocks(SnowContext *s);
+int ff_snow_frame_start(SnowContext *s);
+void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride,
+ int sx, int sy, int b_w, int b_h, BlockNode *block,
+ int plane_index, int w, int h);
+/* common inline functions */
+//XXX doublecheck all of them should stay inlined
+
+static inline void snow_set_blocks(SnowContext *s, int level, int x, int y, int l, int cb, int cr, int mx, int my, int ref, int type){
+ const int w= s->b_width << s->block_max_depth;
+ const int rem_depth= s->block_max_depth - level;
+ const int index= (x + y*w) << rem_depth;
+ const int block_w= 1<<rem_depth;
+ BlockNode block;
+ int i,j;
+
+ block.color[0]= l;
+ block.color[1]= cb;
+ block.color[2]= cr;
+ block.mx= mx;
+ block.my= my;
+ block.ref= ref;
+ block.type= type;
+ block.level= level;
+
+ for(j=0; j<block_w; j++){
+ for(i=0; i<block_w; i++){
+ s->block[index + i + j*w]= block;
+ }
+ }
+}
+
+static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref,
+ const BlockNode *left, const BlockNode *top, const BlockNode *tr){
+ if(s->ref_frames == 1){
+ *mx = mid_pred(left->mx, top->mx, tr->mx);
+ *my = mid_pred(left->my, top->my, tr->my);
+ }else{
+ const int *scale = scale_mv_ref[ref];
+ *mx = mid_pred((left->mx * scale[left->ref] + 128) >>8,
+ (top ->mx * scale[top ->ref] + 128) >>8,
+ (tr ->mx * scale[tr ->ref] + 128) >>8);
+ *my = mid_pred((left->my * scale[left->ref] + 128) >>8,
+ (top ->my * scale[top ->ref] + 128) >>8,
+ (tr ->my * scale[tr ->ref] + 128) >>8);
+ }
+}
+
+static av_always_inline int same_block(BlockNode *a, BlockNode *b){
+ if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){
+ return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2]));
+ }else{
+ return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA));
+ }
+}
+
+//FIXME name cleanup (b_w, block_w, b_width stuff)
+//XXX should we really inline it?
+static av_always_inline void add_yblock(SnowContext *s, int sliced, slice_buffer *sb, IDWTELEM *dst, uint8_t *dst8, const uint8_t *obmc, int src_x, int src_y, int b_w, int b_h, int w, int h, int dst_stride, int src_stride, int obmc_stride, int b_x, int b_y, int add, int offset_dst, int plane_index){
+ const int b_width = s->b_width << s->block_max_depth;
+ const int b_height= s->b_height << s->block_max_depth;
+ const int b_stride= b_width;
+ BlockNode *lt= &s->block[b_x + b_y*b_stride];
+ BlockNode *rt= lt+1;
+ BlockNode *lb= lt+b_stride;
+ BlockNode *rb= lb+1;
+ uint8_t *block[4];
+ int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride;
+ uint8_t *tmp = s->scratchbuf;
+ uint8_t *ptmp;
+ int x,y;
+
+ if(b_x<0){
+ lt= rt;
+ lb= rb;
+ }else if(b_x + 1 >= b_width){
+ rt= lt;
+ rb= lb;
+ }
+ if(b_y<0){
+ lt= lb;
+ rt= rb;
+ }else if(b_y + 1 >= b_height){
+ lb= lt;
+ rb= rt;
+ }
+
+ if(src_x<0){ //FIXME merge with prev & always round internal width up to *16
+ obmc -= src_x;
+ b_w += src_x;
+ if(!sliced && !offset_dst)
+ dst -= src_x;
+ src_x=0;
+ }else if(src_x + b_w > w){
+ b_w = w - src_x;
+ }
+ if(src_y<0){
+ obmc -= src_y*obmc_stride;
+ b_h += src_y;
+ if(!sliced && !offset_dst)
+ dst -= src_y*dst_stride;
+ src_y=0;
+ }else if(src_y + b_h> h){
+ b_h = h - src_y;
+ }
+
+ if(b_w<=0 || b_h<=0) return;
+
+ assert(src_stride > 2*MB_SIZE + 5);
+
+ if(!sliced && offset_dst)
+ dst += src_x + src_y*dst_stride;
+ dst8+= src_x + src_y*src_stride;
+// src += src_x + src_y*src_stride;
+
+ ptmp= tmp + 3*tmp_step;
+ block[0]= ptmp;
+ ptmp+=tmp_step;
+ ff_snow_pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h);
+
+ if(same_block(lt, rt)){
+ block[1]= block[0];
+ }else{
+ block[1]= ptmp;
+ ptmp+=tmp_step;
+ ff_snow_pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h);
+ }
+
+ if(same_block(lt, lb)){
+ block[2]= block[0];
+ }else if(same_block(rt, lb)){
+ block[2]= block[1];
+ }else{
+ block[2]= ptmp;
+ ptmp+=tmp_step;
+ ff_snow_pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h);
+ }
+
+ if(same_block(lt, rb) ){
+ block[3]= block[0];
+ }else if(same_block(rt, rb)){
+ block[3]= block[1];
+ }else if(same_block(lb, rb)){
+ block[3]= block[2];
+ }else{
+ block[3]= ptmp;
+ ff_snow_pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h);
+ }
+ if(sliced){
+ s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
+ }else{
+ for(y=0; y<b_h; y++){
+ //FIXME ugly misuse of obmc_stride
+ const uint8_t *obmc1= obmc + y*obmc_stride;
+ const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
+ const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
+ const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
+ for(x=0; x<b_w; x++){
+ int v= obmc1[x] * block[3][x + y*src_stride]
+ +obmc2[x] * block[2][x + y*src_stride]
+ +obmc3[x] * block[1][x + y*src_stride]
+ +obmc4[x] * block[0][x + y*src_stride];
+
+ v <<= 8 - LOG2_OBMC_MAX;
+ if(FRAC_BITS != 8){
+ v >>= 8 - FRAC_BITS;
+ }
+ if(add){
+ v += dst[x + y*dst_stride];
+ v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
+ if(v&(~255)) v= ~(v>>31);
+ dst8[x + y*src_stride] = v;
+ }else{
+ dst[x + y*dst_stride] -= v;
+ }
+ }
+ }
+ }
+}
+
+static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){
+ Plane *p= &s->plane[plane_index];
+ const int mb_w= s->b_width << s->block_max_depth;
+ const int mb_h= s->b_height << s->block_max_depth;
+ int x, y, mb_x;
+ int block_size = MB_SIZE >> s->block_max_depth;
+ int block_w = plane_index ? block_size/2 : block_size;
+ const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
+ const int obmc_stride= plane_index ? block_size : 2*block_size;
+ int ref_stride= s->current_picture.linesize[plane_index];
+ uint8_t *dst8= s->current_picture.data[plane_index];
+ int w= p->width;
+ int h= p->height;
+
+ if(s->keyframe || (s->avctx->debug&512)){
+ if(mb_y==mb_h)
+ return;
+
+ if(add){
+ for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
+ for(x=0; x<w; x++){
+ int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
+ v >>= FRAC_BITS;
+ if(v&(~255)) v= ~(v>>31);
+ dst8[x + y*ref_stride]= v;
+ }
+ }
+ }else{
+ for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
+ for(x=0; x<w; x++){
+ buf[x + y*w]-= 128<<FRAC_BITS;
+ }
+ }
+ }
+
+ return;
+ }
+
+ for(mb_x=0; mb_x<=mb_w; mb_x++){
+ add_yblock(s, 0, NULL, buf, dst8, obmc,
+ block_w*mb_x - block_w/2,
+ block_w*mb_y - block_w/2,
+ block_w, block_w,
+ w, h,
+ w, ref_stride, obmc_stride,
+ mb_x - 1, mb_y - 1,
+ add, 1, plane_index);
+ }
+}
+
+static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){
+ const int mb_h= s->b_height << s->block_max_depth;
+ int mb_y;
+ for(mb_y=0; mb_y<=mb_h; mb_y++)
+ predict_slice(s, buf, plane_index, add, mb_y);
+}
+
+static inline void set_blocks(SnowContext *s, int level, int x, int y, int l, int cb, int cr, int mx, int my, int ref, int type){
+ const int w= s->b_width << s->block_max_depth;
+ const int rem_depth= s->block_max_depth - level;
+ const int index= (x + y*w) << rem_depth;
+ const int block_w= 1<<rem_depth;
+ BlockNode block;
+ int i,j;
+
+ block.color[0]= l;
+ block.color[1]= cb;
+ block.color[2]= cr;
+ block.mx= mx;
+ block.my= my;
+ block.ref= ref;
+ block.type= type;
+ block.level= level;
+
+ for(j=0; j<block_w; j++){
+ for(i=0; i<block_w; i++){
+ s->block[index + i + j*w]= block;
+ }
+ }
+}
+
+static inline void init_ref(MotionEstContext *c, uint8_t *src[3], uint8_t *ref[3], uint8_t *ref2[3], int x, int y, int ref_index){
+ const int offset[3]= {
+ y*c-> stride + x,
+ ((y*c->uvstride + x)>>1),
+ ((y*c->uvstride + x)>>1),
+ };
+ int i;
+ for(i=0; i<3; i++){
+ c->src[0][i]= src [i];
+ c->ref[0][i]= ref [i] + offset[i];
+ }
+ assert(!ref_index);
+}
+
+
+/* bitstream functions */
+
+extern const int8_t quant3bA[256];
+
+#define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0
+
+static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){
+ int i;
+
+ if(v){
+ const int a= FFABS(v);
+ const int e= av_log2(a);
+ const int el= FFMIN(e, 10);
+ put_rac(c, state+0, 0);
+
+ for(i=0; i<el; i++){
+ put_rac(c, state+1+i, 1); //1..10
+ }
+ for(; i<e; i++){
+ put_rac(c, state+1+9, 1); //1..10
+ }
+ put_rac(c, state+1+FFMIN(i,9), 0);
+
+ for(i=e-1; i>=el; i--){
+ put_rac(c, state+22+9, (a>>i)&1); //22..31
+ }
+ for(; i>=0; i--){
+ put_rac(c, state+22+i, (a>>i)&1); //22..31
+ }
+
+ if(is_signed)
+ put_rac(c, state+11 + el, v < 0); //11..21
+ }else{
+ put_rac(c, state+0, 1);
+ }
+}
+
+static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){
+ if(get_rac(c, state+0))
+ return 0;
+ else{
+ int i, e, a;
+ e= 0;
+ while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10
+ e++;
+ }
+
+ a= 1;
+ for(i=e-1; i>=0; i--){
+ a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31
+ }
+
+ e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21
+ return (a^e)-e;
+ }
+}
+
+static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){
+ int i;
+ int r= log2>=0 ? 1<<log2 : 1;
+
+ assert(v>=0);
+ assert(log2>=-4);
+
+ while(v >= r){
+ put_rac(c, state+4+log2, 1);
+ v -= r;
+ log2++;
+ if(log2>0) r+=r;
+ }
+ put_rac(c, state+4+log2, 0);
+
+ for(i=log2-1; i>=0; i--){
+ put_rac(c, state+31-i, (v>>i)&1);
+ }
+}
+
+static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){
+ int i;
+ int r= log2>=0 ? 1<<log2 : 1;
+ int v=0;
+
+ assert(log2>=-4);
+
+ while(get_rac(c, state+4+log2)){
+ v+= r;
+ log2++;
+ if(log2>0) r+=r;
+ }
+
+ for(i=log2-1; i>=0; i--){
+ v+= get_rac(c, state+31-i)<<i;
+ }
+
+ return v;
+}
+
+static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){
+ const int w= b->width;
+ const int h= b->height;
+ int x,y;
+
+ int run, runs;
+ x_and_coeff *xc= b->x_coeff;
+ x_and_coeff *prev_xc= NULL;
+ x_and_coeff *prev2_xc= xc;
+ x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL;
+ x_and_coeff *prev_parent_xc= parent_xc;
+
+ runs= get_symbol2(&s->c, b->state[30], 0);
+ if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
+ else run= INT_MAX;
+
+ for(y=0; y<h; y++){
+ int v=0;
+ int lt=0, t=0, rt=0;
+
+ if(y && prev_xc->x == 0){
+ rt= prev_xc->coeff;
+ }
+ for(x=0; x<w; x++){
+ int p=0;
+ const int l= v;
+
+ lt= t; t= rt;
+
+ if(y){
+ if(prev_xc->x <= x)
+ prev_xc++;
+ if(prev_xc->x == x + 1)
+ rt= prev_xc->coeff;
+ else
+ rt=0;
+ }
+ if(parent_xc){
+ if(x>>1 > parent_xc->x){
+ parent_xc++;
+ }
+ if(x>>1 == parent_xc->x){
+ p= parent_xc->coeff;
+ }
+ }
+ if(/*ll|*/l|lt|t|rt|p){
+ int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1));
+
+ v=get_rac(&s->c, &b->state[0][context]);
+ if(v){
+ v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1);
+ v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l&0xFF] + 3*quant3bA[t&0xFF]]);
+
+ xc->x=x;
+ (xc++)->coeff= v;
+ }
+ }else{
+ if(!run){
+ if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
+ else run= INT_MAX;
+ v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1);
+ v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]);
+
+ xc->x=x;
+ (xc++)->coeff= v;
+ }else{
+ int max_run;
+ run--;
+ v=0;
+
+ if(y) max_run= FFMIN(run, prev_xc->x - x - 2);
+ else max_run= FFMIN(run, w-x-1);
+ if(parent_xc)
+ max_run= FFMIN(max_run, 2*parent_xc->x - x - 1);
+ x+= max_run;
+ run-= max_run;
+ }
+ }
+ }
+ (xc++)->x= w+1; //end marker
+ prev_xc= prev2_xc;
+ prev2_xc= xc;
+
+ if(parent_xc){
+ if(y&1){
+ while(parent_xc->x != parent->width+1)
+ parent_xc++;
+ parent_xc++;
+ prev_parent_xc= parent_xc;
+ }else{
+ parent_xc= prev_parent_xc;
+ }
+ }
+ }
+
+ (xc++)->x= w+1; //end marker
+}
+
#endif /* AVCODEC_SNOW_H */
diff --git a/libavcodec/snowdata.h b/libavcodec/snowdata.h
new file mode 100644
index 0000000000..ca2468c091
--- /dev/null
+++ b/libavcodec/snowdata.h
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_SNOWDATA_H
+#define AVCODEC_SNOWDATA_H
+
+#include "snow.h"
+
+static const uint8_t obmc32[1024]={
+ 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0,
+ 0, 4, 4, 4, 8, 8, 8, 12, 12, 16, 16, 16, 20, 20, 20, 24, 24, 20, 20, 20, 16, 16, 16, 12, 12, 8, 8, 8, 4, 4, 4, 0,
+ 0, 4, 8, 8, 12, 12, 16, 20, 20, 24, 28, 28, 32, 32, 36, 40, 40, 36, 32, 32, 28, 28, 24, 20, 20, 16, 12, 12, 8, 8, 4, 0,
+ 0, 4, 8, 12, 16, 20, 24, 28, 28, 32, 36, 40, 44, 48, 52, 56, 56, 52, 48, 44, 40, 36, 32, 28, 28, 24, 20, 16, 12, 8, 4, 0,
+ 4, 8, 12, 16, 20, 24, 28, 32, 40, 44, 48, 52, 56, 60, 64, 68, 68, 64, 60, 56, 52, 48, 44, 40, 32, 28, 24, 20, 16, 12, 8, 4,
+ 4, 8, 12, 20, 24, 32, 36, 40, 48, 52, 56, 64, 68, 76, 80, 84, 84, 80, 76, 68, 64, 56, 52, 48, 40, 36, 32, 24, 20, 12, 8, 4,
+ 4, 8, 16, 24, 28, 36, 44, 48, 56, 60, 68, 76, 80, 88, 96,100,100, 96, 88, 80, 76, 68, 60, 56, 48, 44, 36, 28, 24, 16, 8, 4,
+ 4, 12, 20, 28, 32, 40, 48, 56, 64, 72, 80, 88, 92,100,108,116,116,108,100, 92, 88, 80, 72, 64, 56, 48, 40, 32, 28, 20, 12, 4,
+ 4, 12, 20, 28, 40, 48, 56, 64, 72, 80, 88, 96,108,116,124,132,132,124,116,108, 96, 88, 80, 72, 64, 56, 48, 40, 28, 20, 12, 4,
+ 4, 16, 24, 32, 44, 52, 60, 72, 80, 92,100,108,120,128,136,148,148,136,128,120,108,100, 92, 80, 72, 60, 52, 44, 32, 24, 16, 4,
+ 4, 16, 28, 36, 48, 56, 68, 80, 88,100,112,120,132,140,152,164,164,152,140,132,120,112,100, 88, 80, 68, 56, 48, 36, 28, 16, 4,
+ 4, 16, 28, 40, 52, 64, 76, 88, 96,108,120,132,144,156,168,180,180,168,156,144,132,120,108, 96, 88, 76, 64, 52, 40, 28, 16, 4,
+ 8, 20, 32, 44, 56, 68, 80, 92,108,120,132,144,156,168,180,192,192,180,168,156,144,132,120,108, 92, 80, 68, 56, 44, 32, 20, 8,
+ 8, 20, 32, 48, 60, 76, 88,100,116,128,140,156,168,184,196,208,208,196,184,168,156,140,128,116,100, 88, 76, 60, 48, 32, 20, 8,
+ 8, 20, 36, 52, 64, 80, 96,108,124,136,152,168,180,196,212,224,224,212,196,180,168,152,136,124,108, 96, 80, 64, 52, 36, 20, 8,
+ 8, 24, 40, 56, 68, 84,100,116,132,148,164,180,192,208,224,240,240,224,208,192,180,164,148,132,116,100, 84, 68, 56, 40, 24, 8,
+ 8, 24, 40, 56, 68, 84,100,116,132,148,164,180,192,208,224,240,240,224,208,192,180,164,148,132,116,100, 84, 68, 56, 40, 24, 8,
+ 8, 20, 36, 52, 64, 80, 96,108,124,136,152,168,180,196,212,224,224,212,196,180,168,152,136,124,108, 96, 80, 64, 52, 36, 20, 8,
+ 8, 20, 32, 48, 60, 76, 88,100,116,128,140,156,168,184,196,208,208,196,184,168,156,140,128,116,100, 88, 76, 60, 48, 32, 20, 8,
+ 8, 20, 32, 44, 56, 68, 80, 92,108,120,132,144,156,168,180,192,192,180,168,156,144,132,120,108, 92, 80, 68, 56, 44, 32, 20, 8,
+ 4, 16, 28, 40, 52, 64, 76, 88, 96,108,120,132,144,156,168,180,180,168,156,144,132,120,108, 96, 88, 76, 64, 52, 40, 28, 16, 4,
+ 4, 16, 28, 36, 48, 56, 68, 80, 88,100,112,120,132,140,152,164,164,152,140,132,120,112,100, 88, 80, 68, 56, 48, 36, 28, 16, 4,
+ 4, 16, 24, 32, 44, 52, 60, 72, 80, 92,100,108,120,128,136,148,148,136,128,120,108,100, 92, 80, 72, 60, 52, 44, 32, 24, 16, 4,
+ 4, 12, 20, 28, 40, 48, 56, 64, 72, 80, 88, 96,108,116,124,132,132,124,116,108, 96, 88, 80, 72, 64, 56, 48, 40, 28, 20, 12, 4,
+ 4, 12, 20, 28, 32, 40, 48, 56, 64, 72, 80, 88, 92,100,108,116,116,108,100, 92, 88, 80, 72, 64, 56, 48, 40, 32, 28, 20, 12, 4,
+ 4, 8, 16, 24, 28, 36, 44, 48, 56, 60, 68, 76, 80, 88, 96,100,100, 96, 88, 80, 76, 68, 60, 56, 48, 44, 36, 28, 24, 16, 8, 4,
+ 4, 8, 12, 20, 24, 32, 36, 40, 48, 52, 56, 64, 68, 76, 80, 84, 84, 80, 76, 68, 64, 56, 52, 48, 40, 36, 32, 24, 20, 12, 8, 4,
+ 4, 8, 12, 16, 20, 24, 28, 32, 40, 44, 48, 52, 56, 60, 64, 68, 68, 64, 60, 56, 52, 48, 44, 40, 32, 28, 24, 20, 16, 12, 8, 4,
+ 0, 4, 8, 12, 16, 20, 24, 28, 28, 32, 36, 40, 44, 48, 52, 56, 56, 52, 48, 44, 40, 36, 32, 28, 28, 24, 20, 16, 12, 8, 4, 0,
+ 0, 4, 8, 8, 12, 12, 16, 20, 20, 24, 28, 28, 32, 32, 36, 40, 40, 36, 32, 32, 28, 28, 24, 20, 20, 16, 12, 12, 8, 8, 4, 0,
+ 0, 4, 4, 4, 8, 8, 8, 12, 12, 16, 16, 16, 20, 20, 20, 24, 24, 20, 20, 20, 16, 16, 16, 12, 12, 8, 8, 8, 4, 4, 4, 0,
+ 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0,
+ //error:0.000020
+};
+static const uint8_t obmc16[256]={
+ 0, 4, 4, 8, 8, 12, 12, 16, 16, 12, 12, 8, 8, 4, 4, 0,
+ 4, 8, 16, 20, 28, 32, 40, 44, 44, 40, 32, 28, 20, 16, 8, 4,
+ 4, 16, 24, 36, 44, 56, 64, 76, 76, 64, 56, 44, 36, 24, 16, 4,
+ 8, 20, 36, 48, 64, 76, 92,104,104, 92, 76, 64, 48, 36, 20, 8,
+ 8, 28, 44, 64, 80,100,116,136,136,116,100, 80, 64, 44, 28, 8,
+ 12, 32, 56, 76,100,120,144,164,164,144,120,100, 76, 56, 32, 12,
+ 12, 40, 64, 92,116,144,168,196,196,168,144,116, 92, 64, 40, 12,
+ 16, 44, 76,104,136,164,196,224,224,196,164,136,104, 76, 44, 16,
+ 16, 44, 76,104,136,164,196,224,224,196,164,136,104, 76, 44, 16,
+ 12, 40, 64, 92,116,144,168,196,196,168,144,116, 92, 64, 40, 12,
+ 12, 32, 56, 76,100,120,144,164,164,144,120,100, 76, 56, 32, 12,
+ 8, 28, 44, 64, 80,100,116,136,136,116,100, 80, 64, 44, 28, 8,
+ 8, 20, 36, 48, 64, 76, 92,104,104, 92, 76, 64, 48, 36, 20, 8,
+ 4, 16, 24, 36, 44, 56, 64, 76, 76, 64, 56, 44, 36, 24, 16, 4,
+ 4, 8, 16, 20, 28, 32, 40, 44, 44, 40, 32, 28, 20, 16, 8, 4,
+ 0, 4, 4, 8, 8, 12, 12, 16, 16, 12, 12, 8, 8, 4, 4, 0,
+//error:0.000015
+};
+
+//linear *64
+static const uint8_t obmc8[64]={
+ 4, 12, 20, 28, 28, 20, 12, 4,
+ 12, 36, 60, 84, 84, 60, 36, 12,
+ 20, 60,100,140,140,100, 60, 20,
+ 28, 84,140,196,196,140, 84, 28,
+ 28, 84,140,196,196,140, 84, 28,
+ 20, 60,100,140,140,100, 60, 20,
+ 12, 36, 60, 84, 84, 60, 36, 12,
+ 4, 12, 20, 28, 28, 20, 12, 4,
+//error:0.000000
+};
+
+//linear *64
+static const uint8_t obmc4[16]={
+ 16, 48, 48, 16,
+ 48,144,144, 48,
+ 48,144,144, 48,
+ 16, 48, 48, 16,
+//error:0.000000
+};
+
+const int8_t quant3bA[256]={
+ 0, 0, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+ 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1, 1,-1,
+};
+
+const uint8_t * const obmc_tab[4]= {
+ obmc32, obmc16, obmc8, obmc4
+};
+
+/* runtime generated tables */
+uint8_t qexp[QROOT];
+int scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES];
+
+
+#endif /* AVCODEC_SNOW_H */
diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c
new file mode 100644
index 0000000000..2b6f6e11c7
--- /dev/null
+++ b/libavcodec/snowdec.c
@@ -0,0 +1,546 @@
+/*
+ * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/intmath.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+#include "avcodec.h"
+#include "dsputil.h"
+#include "dwt.h"
+#include "snow.h"
+
+#include "rangecoder.h"
+#include "mathops.h"
+
+#include "mpegvideo.h"
+#include "h263.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer * sb, IDWTELEM * old_buffer, int plane_index, int add, int mb_y){
+ Plane *p= &s->plane[plane_index];
+ const int mb_w= s->b_width << s->block_max_depth;
+ const int mb_h= s->b_height << s->block_max_depth;
+ int x, y, mb_x;
+ int block_size = MB_SIZE >> s->block_max_depth;
+ int block_w = plane_index ? block_size/2 : block_size;
+ const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
+ int obmc_stride= plane_index ? block_size : 2*block_size;
+ int ref_stride= s->current_picture.linesize[plane_index];
+ uint8_t *dst8= s->current_picture.data[plane_index];
+ int w= p->width;
+ int h= p->height;
+
+ if(s->keyframe || (s->avctx->debug&512)){
+ if(mb_y==mb_h)
+ return;
+
+ if(add){
+ for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
+// DWTELEM * line = slice_buffer_get_line(sb, y);
+ IDWTELEM * line = sb->line[y];
+ for(x=0; x<w; x++){
+// int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
+ int v= line[x] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
+ v >>= FRAC_BITS;
+ if(v&(~255)) v= ~(v>>31);
+ dst8[x + y*ref_stride]= v;
+ }
+ }
+ }else{
+ for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
+// DWTELEM * line = slice_buffer_get_line(sb, y);
+ IDWTELEM * line = sb->line[y];
+ for(x=0; x<w; x++){
+ line[x] -= 128 << FRAC_BITS;
+// buf[x + y*w]-= 128<<FRAC_BITS;
+ }
+ }
+ }
+
+ return;
+ }
+
+ for(mb_x=0; mb_x<=mb_w; mb_x++){
+ add_yblock(s, 1, sb, old_buffer, dst8, obmc,
+ block_w*mb_x - block_w/2,
+ block_w*mb_y - block_w/2,
+ block_w, block_w,
+ w, h,
+ w, ref_stride, obmc_stride,
+ mb_x - 1, mb_y - 1,
+ add, 0, plane_index);
+ }
+}
+
+static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){
+ const int w= b->width;
+ int y;
+ const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
+ int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
+ int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
+ int new_index = 0;
+
+ if(b->ibuf == s->spatial_idwt_buffer || s->qlog == LOSSLESS_QLOG){
+ qadd= 0;
+ qmul= 1<<QEXPSHIFT;
+ }
+
+ /* If we are on the second or later slice, restore our index. */
+ if (start_y != 0)
+ new_index = save_state[0];
+
+
+ for(y=start_y; y<h; y++){
+ int x = 0;
+ int v;
+ IDWTELEM * line = slice_buffer_get_line(sb, y * b->stride_line + b->buf_y_offset) + b->buf_x_offset;
+ memset(line, 0, b->width*sizeof(IDWTELEM));
+ v = b->x_coeff[new_index].coeff;
+ x = b->x_coeff[new_index++].x;
+ while(x < w){
+ register int t= ( (v>>1)*qmul + qadd)>>QEXPSHIFT;
+ register int u= -(v&1);
+ line[x] = (t^u) - u;
+
+ v = b->x_coeff[new_index].coeff;
+ x = b->x_coeff[new_index++].x;
+ }
+ }
+
+ /* Save our variables for the next slice. */
+ save_state[0] = new_index;
+
+ return;
+}
+
+static void decode_q_branch(SnowContext *s, int level, int x, int y){
+ const int w= s->b_width << s->block_max_depth;
+ const int rem_depth= s->block_max_depth - level;
+ const int index= (x + y*w) << rem_depth;
+ int trx= (x+1)<<rem_depth;
+ const BlockNode *left = x ? &s->block[index-1] : &null_block;
+ const BlockNode *top = y ? &s->block[index-w] : &null_block;
+ const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
+ const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
+ int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
+
+ if(s->keyframe){
+ set_blocks(s, level, x, y, null_block.color[0], null_block.color[1], null_block.color[2], null_block.mx, null_block.my, null_block.ref, BLOCK_INTRA);
+ return;
+ }
+
+ if(level==s->block_max_depth || get_rac(&s->c, &s->block_state[4 + s_context])){
+ int type, mx, my;
+ int l = left->color[0];
+ int cb= left->color[1];
+ int cr= left->color[2];
+ int ref = 0;
+ int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
+ int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 0*av_log2(2*FFABS(tr->mx - top->mx));
+ int my_context= av_log2(2*FFABS(left->my - top->my)) + 0*av_log2(2*FFABS(tr->my - top->my));
+
+ type= get_rac(&s->c, &s->block_state[1 + left->type + top->type]) ? BLOCK_INTRA : 0;
+
+ if(type){
+ pred_mv(s, &mx, &my, 0, left, top, tr);
+ l += get_symbol(&s->c, &s->block_state[32], 1);
+ cb+= get_symbol(&s->c, &s->block_state[64], 1);
+ cr+= get_symbol(&s->c, &s->block_state[96], 1);
+ }else{
+ if(s->ref_frames > 1)
+ ref= get_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], 0);
+ pred_mv(s, &mx, &my, ref, left, top, tr);
+ mx+= get_symbol(&s->c, &s->block_state[128 + 32*(mx_context + 16*!!ref)], 1);
+ my+= get_symbol(&s->c, &s->block_state[128 + 32*(my_context + 16*!!ref)], 1);
+ }
+ set_blocks(s, level, x, y, l, cb, cr, mx, my, ref, type);
+ }else{
+ decode_q_branch(s, level+1, 2*x+0, 2*y+0);
+ decode_q_branch(s, level+1, 2*x+1, 2*y+0);
+ decode_q_branch(s, level+1, 2*x+0, 2*y+1);
+ decode_q_branch(s, level+1, 2*x+1, 2*y+1);
+ }
+}
+
+static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y){
+ const int w= b->width;
+ const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
+ const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
+ const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
+ int x,y;
+
+ if(s->qlog == LOSSLESS_QLOG) return;
+
+ for(y=start_y; y<end_y; y++){
+// DWTELEM * line = slice_buffer_get_line_from_address(sb, src + (y * stride));
+ IDWTELEM * line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
+ for(x=0; x<w; x++){
+ int i= line[x];
+ if(i<0){
+ line[x]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
+ }else if(i>0){
+ line[x]= (( i*qmul + qadd)>>(QEXPSHIFT));
+ }
+ }
+ }
+}
+
+static void correlate_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median, int start_y, int end_y){
+ const int w= b->width;
+ int x,y;
+
+ IDWTELEM * line=0; // silence silly "could be used without having been initialized" warning
+ IDWTELEM * prev;
+
+ if (start_y != 0)
+ line = slice_buffer_get_line(sb, ((start_y - 1) * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
+
+ for(y=start_y; y<end_y; y++){
+ prev = line;
+// line = slice_buffer_get_line_from_address(sb, src + (y * stride));
+ line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
+ for(x=0; x<w; x++){
+ if(x){
+ if(use_median){
+ if(y && x+1<w) line[x] += mid_pred(line[x - 1], prev[x], prev[x + 1]);
+ else line[x] += line[x - 1];
+ }else{
+ if(y) line[x] += mid_pred(line[x - 1], prev[x], line[x - 1] + prev[x] - prev[x - 1]);
+ else line[x] += line[x - 1];
+ }
+ }else{
+ if(y) line[x] += prev[x];
+ }
+ }
+ }
+}
+
+static void decode_qlogs(SnowContext *s){
+ int plane_index, level, orientation;
+
+ for(plane_index=0; plane_index<3; plane_index++){
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1:0; orientation<4; orientation++){
+ int q;
+ if (plane_index==2) q= s->plane[1].band[level][orientation].qlog;
+ else if(orientation==2) q= s->plane[plane_index].band[level][1].qlog;
+ else q= get_symbol(&s->c, s->header_state, 1);
+ s->plane[plane_index].band[level][orientation].qlog= q;
+ }
+ }
+ }
+}
+
+#define GET_S(dst, check) \
+ tmp= get_symbol(&s->c, s->header_state, 0);\
+ if(!(check)){\
+ av_log(s->avctx, AV_LOG_ERROR, "Error " #dst " is %d\n", tmp);\
+ return -1;\
+ }\
+ dst= tmp;
+
+static int decode_header(SnowContext *s){
+ int plane_index, tmp;
+ uint8_t kstate[32];
+
+ memset(kstate, MID_STATE, sizeof(kstate));
+
+ s->keyframe= get_rac(&s->c, kstate);
+ if(s->keyframe || s->always_reset){
+ ff_snow_reset_contexts(s);
+ s->spatial_decomposition_type=
+ s->qlog=
+ s->qbias=
+ s->mv_scale=
+ s->block_max_depth= 0;
+ }
+ if(s->keyframe){
+ GET_S(s->version, tmp <= 0U)
+ s->always_reset= get_rac(&s->c, s->header_state);
+ s->temporal_decomposition_type= get_symbol(&s->c, s->header_state, 0);
+ s->temporal_decomposition_count= get_symbol(&s->c, s->header_state, 0);
+ GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
+ s->colorspace_type= get_symbol(&s->c, s->header_state, 0);
+ s->chroma_h_shift= get_symbol(&s->c, s->header_state, 0);
+ s->chroma_v_shift= get_symbol(&s->c, s->header_state, 0);
+ s->spatial_scalability= get_rac(&s->c, s->header_state);
+// s->rate_scalability= get_rac(&s->c, s->header_state);
+ GET_S(s->max_ref_frames, tmp < (unsigned)MAX_REF_FRAMES)
+ s->max_ref_frames++;
+
+ decode_qlogs(s);
+ }
+
+ if(!s->keyframe){
+ if(get_rac(&s->c, s->header_state)){
+ for(plane_index=0; plane_index<2; plane_index++){
+ int htaps, i, sum=0;
+ Plane *p= &s->plane[plane_index];
+ p->diag_mc= get_rac(&s->c, s->header_state);
+ htaps= get_symbol(&s->c, s->header_state, 0)*2 + 2;
+ if((unsigned)htaps > HTAPS_MAX || htaps==0)
+ return -1;
+ p->htaps= htaps;
+ for(i= htaps/2; i; i--){
+ p->hcoeff[i]= get_symbol(&s->c, s->header_state, 0) * (1-2*(i&1));
+ sum += p->hcoeff[i];
+ }
+ p->hcoeff[0]= 32-sum;
+ }
+ s->plane[2].diag_mc= s->plane[1].diag_mc;
+ s->plane[2].htaps = s->plane[1].htaps;
+ memcpy(s->plane[2].hcoeff, s->plane[1].hcoeff, sizeof(s->plane[1].hcoeff));
+ }
+ if(get_rac(&s->c, s->header_state)){
+ GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
+ decode_qlogs(s);
+ }
+ }
+
+ s->spatial_decomposition_type+= get_symbol(&s->c, s->header_state, 1);
+ if(s->spatial_decomposition_type > 1U){
+ av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_type %d not supported", s->spatial_decomposition_type);
+ return -1;
+ }
+ if(FFMIN(s->avctx-> width>>s->chroma_h_shift,
+ s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 0){
+ av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_count %d too large for size", s->spatial_decomposition_count);
+ return -1;
+ }
+
+ s->qlog += get_symbol(&s->c, s->header_state, 1);
+ s->mv_scale += get_symbol(&s->c, s->header_state, 1);
+ s->qbias += get_symbol(&s->c, s->header_state, 1);
+ s->block_max_depth+= get_symbol(&s->c, s->header_state, 1);
+ if(s->block_max_depth > 1 || s->block_max_depth < 0){
+ av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large", s->block_max_depth);
+ s->block_max_depth= 0;
+ return -1;
+ }
+
+ return 0;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ avctx->pix_fmt= PIX_FMT_YUV420P;
+
+ ff_snow_common_init(avctx);
+
+ return 0;
+}
+
+static void decode_blocks(SnowContext *s){
+ int x, y;
+ int w= s->b_width;
+ int h= s->b_height;
+
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ decode_q_branch(s, 0, x, y);
+ }
+ }
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt){
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ SnowContext *s = avctx->priv_data;
+ RangeCoder * const c= &s->c;
+ int bytes_read;
+ AVFrame *picture = data;
+ int level, orientation, plane_index;
+
+ ff_init_range_decoder(c, buf, buf_size);
+ ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
+
+ s->current_picture.pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P
+ if(decode_header(s)<0)
+ return -1;
+ ff_snow_common_init_after_header(avctx);
+
+ // realloc slice buffer for the case that spatial_decomposition_count changed
+ ff_slice_buffer_destroy(&s->sb);
+ ff_slice_buffer_init(&s->sb, s->plane[0].height, (MB_SIZE >> s->block_max_depth) + s->spatial_decomposition_count * 8 + 1, s->plane[0].width, s->spatial_idwt_buffer);
+
+ for(plane_index=0; plane_index<3; plane_index++){
+ Plane *p= &s->plane[plane_index];
+ p->fast_mc= p->diag_mc && p->htaps==6 && p->hcoeff[0]==40
+ && p->hcoeff[1]==-10
+ && p->hcoeff[2]==2;
+ }
+
+ ff_snow_alloc_blocks(s);
+
+ if(ff_snow_frame_start(s) < 0)
+ return -1;
+ //keyframe flag duplication mess FIXME
+ if(avctx->debug&FF_DEBUG_PICT_INFO)
+ av_log(avctx, AV_LOG_ERROR, "keyframe:%d qlog:%d\n", s->keyframe, s->qlog);
+
+ decode_blocks(s);
+
+ for(plane_index=0; plane_index<3; plane_index++){
+ Plane *p= &s->plane[plane_index];
+ int w= p->width;
+ int h= p->height;
+ int x, y;
+ int decode_state[MAX_DECOMPOSITIONS][4][1]; /* Stored state info for unpack_coeffs. 1 variable per instance. */
+
+ if(s->avctx->debug&2048){
+ memset(s->spatial_dwt_buffer, 0, sizeof(DWTELEM)*w*h);
+ predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
+
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int v= s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x];
+ s->mconly_picture.data[plane_index][y*s->mconly_picture.linesize[plane_index] + x]= v;
+ }
+ }
+ }
+
+ {
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+ unpack_coeffs(s, b, b->parent, orientation);
+ }
+ }
+ }
+
+ {
+ const int mb_h= s->b_height << s->block_max_depth;
+ const int block_size = MB_SIZE >> s->block_max_depth;
+ const int block_w = plane_index ? block_size/2 : block_size;
+ int mb_y;
+ DWTCompose cs[MAX_DECOMPOSITIONS];
+ int yd=0, yq=0;
+ int y;
+ int end_y;
+
+ ff_spatial_idwt_buffered_init(cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count);
+ for(mb_y=0; mb_y<=mb_h; mb_y++){
+
+ int slice_starty = block_w*mb_y;
+ int slice_h = block_w*(mb_y+1);
+ if (!(s->keyframe || s->avctx->debug&512)){
+ slice_starty = FFMAX(0, slice_starty - (block_w >> 1));
+ slice_h -= (block_w >> 1);
+ }
+
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+ int start_y;
+ int end_y;
+ int our_mb_start = mb_y;
+ int our_mb_end = (mb_y + 1);
+ const int extra= 3;
+ start_y = (mb_y ? ((block_w * our_mb_start) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra: 0);
+ end_y = (((block_w * our_mb_end) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra);
+ if (!(s->keyframe || s->avctx->debug&512)){
+ start_y = FFMAX(0, start_y - (block_w >> (1+s->spatial_decomposition_count - level)));
+ end_y = FFMAX(0, end_y - (block_w >> (1+s->spatial_decomposition_count - level)));
+ }
+ start_y = FFMIN(b->height, start_y);
+ end_y = FFMIN(b->height, end_y);
+
+ if (start_y != end_y){
+ if (orientation == 0){
+ SubBand * correlate_band = &p->band[0][0];
+ int correlate_end_y = FFMIN(b->height, end_y + 1);
+ int correlate_start_y = FFMIN(b->height, (start_y ? start_y + 1 : 0));
+ decode_subband_slice_buffered(s, correlate_band, &s->sb, correlate_start_y, correlate_end_y, decode_state[0][0]);
+ correlate_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, 1, 0, correlate_start_y, correlate_end_y);
+ dequantize_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, start_y, end_y);
+ }
+ else
+ decode_subband_slice_buffered(s, b, &s->sb, start_y, end_y, decode_state[level][orientation]);
+ }
+ }
+ }
+
+ for(; yd<slice_h; yd+=4){
+ ff_spatial_idwt_buffered_slice(&s->dwt, cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count, yd);
+ }
+
+ if(s->qlog == LOSSLESS_QLOG){
+ for(; yq<slice_h && yq<h; yq++){
+ IDWTELEM * line = slice_buffer_get_line(&s->sb, yq);
+ for(x=0; x<w; x++){
+ line[x] <<= FRAC_BITS;
+ }
+ }
+ }
+
+ predict_slice_buffered(s, &s->sb, s->spatial_idwt_buffer, plane_index, 1, mb_y);
+
+ y = FFMIN(p->height, slice_starty);
+ end_y = FFMIN(p->height, slice_h);
+ while(y < end_y)
+ ff_slice_buffer_release(&s->sb, y++);
+ }
+
+ ff_slice_buffer_flush(&s->sb);
+ }
+
+ }
+
+ emms_c();
+
+ ff_snow_release_buffer(avctx);
+
+ if(!(s->avctx->debug&2048))
+ *picture= s->current_picture;
+ else
+ *picture= s->mconly_picture;
+
+ *data_size = sizeof(AVFrame);
+
+ bytes_read= c->bytestream - c->bytestream_start;
+ if(bytes_read ==0) av_log(s->avctx, AV_LOG_ERROR, "error at end of frame\n"); //FIXME
+
+ return bytes_read;
+}
+
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+ SnowContext *s = avctx->priv_data;
+
+ ff_slice_buffer_destroy(&s->sb);
+
+ ff_snow_common_end(s);
+
+ return 0;
+}
+
+AVCodec ff_snow_decoder = {
+ .name = "snow",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_SNOW,
+ .priv_data_size = sizeof(SnowContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,
+ .long_name = NULL_IF_CONFIG_SMALL("Snow"),
+};
diff --git a/libavcodec/snowenc.c b/libavcodec/snowenc.c
new file mode 100644
index 0000000000..4926eef5d2
--- /dev/null
+++ b/libavcodec/snowenc.c
@@ -0,0 +1,1915 @@
+/*
+ * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/intmath.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+#include "avcodec.h"
+#include "dsputil.h"
+#include "dwt.h"
+#include "snow.h"
+
+#include "rangecoder.h"
+#include "mathops.h"
+
+#include "mpegvideo.h"
+#include "h263.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+#define QUANTIZE2 0
+
+#if QUANTIZE2==1
+#define Q2_STEP 8
+
+static void find_sse(SnowContext *s, Plane *p, int *score, int score_stride, IDWTELEM *r0, IDWTELEM *r1, int level, int orientation){
+ SubBand *b= &p->band[level][orientation];
+ int x, y;
+ int xo=0;
+ int yo=0;
+ int step= 1 << (s->spatial_decomposition_count - level);
+
+ if(orientation&1)
+ xo= step>>1;
+ if(orientation&2)
+ yo= step>>1;
+
+ //FIXME bias for nonzero ?
+ //FIXME optimize
+ memset(score, 0, sizeof(*score)*score_stride*((p->height + Q2_STEP-1)/Q2_STEP));
+ for(y=0; y<p->height; y++){
+ for(x=0; x<p->width; x++){
+ int sx= (x-xo + step/2) / step / Q2_STEP;
+ int sy= (y-yo + step/2) / step / Q2_STEP;
+ int v= r0[x + y*p->width] - r1[x + y*p->width];
+ assert(sx>=0 && sy>=0 && sx < score_stride);
+ v= ((v+8)>>4)<<4;
+ score[sx + sy*score_stride] += v*v;
+ assert(score[sx + sy*score_stride] >= 0);
+ }
+ }
+}
+
+static void dequantize_all(SnowContext *s, Plane *p, IDWTELEM *buffer, int width, int height){
+ int level, orientation;
+
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+ IDWTELEM *dst= buffer + (b->ibuf - s->spatial_idwt_buffer);
+
+ dequantize(s, b, dst, b->stride);
+ }
+ }
+}
+
+static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, int height, int stride, int type){
+ int level, orientation, ys, xs, x, y, pass;
+ IDWTELEM best_dequant[height * stride];
+ IDWTELEM idwt2_buffer[height * stride];
+ const int score_stride= (width + 10)/Q2_STEP;
+ int best_score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
+ int score[(width + 10)/Q2_STEP * (height + 10)/Q2_STEP]; //FIXME size
+ int threshold= (s->m.lambda * s->m.lambda) >> 6;
+
+ //FIXME pass the copy cleanly ?
+
+// memcpy(dwt_buffer, buffer, height * stride * sizeof(DWTELEM));
+ ff_spatial_dwt(buffer, width, height, stride, type, s->spatial_decomposition_count);
+
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+ IDWTELEM *dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
+ DWTELEM *src= buffer + (b-> buf - s->spatial_dwt_buffer);
+ assert(src == b->buf); // code does not depend on this but it is true currently
+
+ quantize(s, b, dst, src, b->stride, s->qbias);
+ }
+ }
+ for(pass=0; pass<1; pass++){
+ if(s->qbias == 0) //keyframe
+ continue;
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+ IDWTELEM *dst= idwt2_buffer + (b->ibuf - s->spatial_idwt_buffer);
+ IDWTELEM *best_dst= best_dequant + (b->ibuf - s->spatial_idwt_buffer);
+
+ for(ys= 0; ys<Q2_STEP; ys++){
+ for(xs= 0; xs<Q2_STEP; xs++){
+ memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
+ dequantize_all(s, p, idwt2_buffer, width, height);
+ ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
+ find_sse(s, p, best_score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
+ memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
+ for(y=ys; y<b->height; y+= Q2_STEP){
+ for(x=xs; x<b->width; x+= Q2_STEP){
+ if(dst[x + y*b->stride]<0) dst[x + y*b->stride]++;
+ if(dst[x + y*b->stride]>0) dst[x + y*b->stride]--;
+ //FIXME try more than just --
+ }
+ }
+ dequantize_all(s, p, idwt2_buffer, width, height);
+ ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
+ find_sse(s, p, score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
+ for(y=ys; y<b->height; y+= Q2_STEP){
+ for(x=xs; x<b->width; x+= Q2_STEP){
+ int score_idx= x/Q2_STEP + (y/Q2_STEP)*score_stride;
+ if(score[score_idx] <= best_score[score_idx] + threshold){
+ best_score[score_idx]= score[score_idx];
+ if(best_dst[x + y*b->stride]<0) best_dst[x + y*b->stride]++;
+ if(best_dst[x + y*b->stride]>0) best_dst[x + y*b->stride]--;
+ //FIXME copy instead
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ memcpy(s->spatial_idwt_buffer, best_dequant, height * stride * sizeof(IDWTELEM)); //FIXME work with that directly instead of copy at the end
+}
+
+#endif /* QUANTIZE2==1 */
+
+#if CONFIG_SNOW_ENCODER
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+ SnowContext *s = avctx->priv_data;
+ int plane_index;
+
+ if(avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
+ av_log(avctx, AV_LOG_ERROR, "This codec is under development, files encoded with it may not be decodable with future versions!!!\n"
+ "Use vstrict=-2 / -strict -2 to use it anyway.\n");
+ return -1;
+ }
+
+ if(avctx->prediction_method == DWT_97
+ && (avctx->flags & CODEC_FLAG_QSCALE)
+ && avctx->global_quality == 0){
+ av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
+ return -1;
+ }
+
+ s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
+
+ s->mv_scale = (avctx->flags & CODEC_FLAG_QPEL) ? 2 : 4;
+ s->block_max_depth= (avctx->flags & CODEC_FLAG_4MV ) ? 1 : 0;
+
+ for(plane_index=0; plane_index<3; plane_index++){
+ s->plane[plane_index].diag_mc= 1;
+ s->plane[plane_index].htaps= 6;
+ s->plane[plane_index].hcoeff[0]= 40;
+ s->plane[plane_index].hcoeff[1]= -10;
+ s->plane[plane_index].hcoeff[2]= 2;
+ s->plane[plane_index].fast_mc= 1;
+ }
+
+ ff_snow_common_init(avctx);
+ ff_snow_alloc_blocks(s);
+
+ s->version=0;
+
+ s->m.avctx = avctx;
+ s->m.flags = avctx->flags;
+ s->m.bit_rate= avctx->bit_rate;
+
+ s->m.me.temp =
+ s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
+ s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
+ s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
+ s->m.obmc_scratchpad= av_mallocz(MB_SIZE*MB_SIZE*12*sizeof(uint32_t));
+ h263_encode_init(&s->m); //mv_penalty
+
+ s->max_ref_frames = FFMAX(FFMIN(avctx->refs, MAX_REF_FRAMES), 1);
+
+ if(avctx->flags&CODEC_FLAG_PASS1){
+ if(!avctx->stats_out)
+ avctx->stats_out = av_mallocz(256);
+ }
+ if((avctx->flags&CODEC_FLAG_PASS2) || !(avctx->flags&CODEC_FLAG_QSCALE)){
+ if(ff_rate_control_init(&s->m) < 0)
+ return -1;
+ }
+ s->pass1_rc= !(avctx->flags & (CODEC_FLAG_QSCALE|CODEC_FLAG_PASS2));
+
+ avctx->coded_frame= &s->current_picture;
+ switch(avctx->pix_fmt){
+// case PIX_FMT_YUV444P:
+// case PIX_FMT_YUV422P:
+ case PIX_FMT_YUV420P:
+ case PIX_FMT_GRAY8:
+// case PIX_FMT_YUV411P:
+// case PIX_FMT_YUV410P:
+ s->colorspace_type= 0;
+ break;
+/* case PIX_FMT_RGB32:
+ s->colorspace= 1;
+ break;*/
+ default:
+ av_log(avctx, AV_LOG_ERROR, "pixel format not supported\n");
+ return -1;
+ }
+// avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
+ s->chroma_h_shift= 1;
+ s->chroma_v_shift= 1;
+
+ ff_set_cmp(&s->dsp, s->dsp.me_cmp, s->avctx->me_cmp);
+ ff_set_cmp(&s->dsp, s->dsp.me_sub_cmp, s->avctx->me_sub_cmp);
+
+ s->avctx->get_buffer(s->avctx, &s->input_picture);
+
+ if(s->avctx->me_method == ME_ITER){
+ int i;
+ int size= s->b_width * s->b_height << 2*s->block_max_depth;
+ for(i=0; i<s->max_ref_frames; i++){
+ s->ref_mvs[i]= av_mallocz(size*sizeof(int16_t[2]));
+ s->ref_scores[i]= av_mallocz(size*sizeof(uint32_t));
+ }
+ }
+
+ return 0;
+}
+
+//near copy & paste from dsputil, FIXME
+static int pix_sum(uint8_t * pix, int line_size, int w)
+{
+ int s, i, j;
+
+ s = 0;
+ for (i = 0; i < w; i++) {
+ for (j = 0; j < w; j++) {
+ s += pix[0];
+ pix ++;
+ }
+ pix += line_size - w;
+ }
+ return s;
+}
+
+//near copy & paste from dsputil, FIXME
+static int pix_norm1(uint8_t * pix, int line_size, int w)
+{
+ int s, i, j;
+ uint32_t *sq = ff_squareTbl + 256;
+
+ s = 0;
+ for (i = 0; i < w; i++) {
+ for (j = 0; j < w; j ++) {
+ s += sq[pix[0]];
+ pix ++;
+ }
+ pix += line_size - w;
+ }
+ return s;
+}
+
+//FIXME copy&paste
+#define P_LEFT P[1]
+#define P_TOP P[2]
+#define P_TOPRIGHT P[3]
+#define P_MEDIAN P[4]
+#define P_MV1 P[9]
+#define FLAG_QPEL 1 //must be 1
+
+static int encode_q_branch(SnowContext *s, int level, int x, int y){
+ uint8_t p_buffer[1024];
+ uint8_t i_buffer[1024];
+ uint8_t p_state[sizeof(s->block_state)];
+ uint8_t i_state[sizeof(s->block_state)];
+ RangeCoder pc, ic;
+ uint8_t *pbbak= s->c.bytestream;
+ uint8_t *pbbak_start= s->c.bytestream_start;
+ int score, score2, iscore, i_len, p_len, block_s, sum, base_bits;
+ const int w= s->b_width << s->block_max_depth;
+ const int h= s->b_height << s->block_max_depth;
+ const int rem_depth= s->block_max_depth - level;
+ const int index= (x + y*w) << rem_depth;
+ const int block_w= 1<<(LOG2_MB_SIZE - level);
+ int trx= (x+1)<<rem_depth;
+ int try= (y+1)<<rem_depth;
+ const BlockNode *left = x ? &s->block[index-1] : &null_block;
+ const BlockNode *top = y ? &s->block[index-w] : &null_block;
+ const BlockNode *right = trx<w ? &s->block[index+1] : &null_block;
+ const BlockNode *bottom= try<h ? &s->block[index+w] : &null_block;
+ const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
+ const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
+ int pl = left->color[0];
+ int pcb= left->color[1];
+ int pcr= left->color[2];
+ int pmx, pmy;
+ int mx=0, my=0;
+ int l,cr,cb;
+ const int stride= s->current_picture.linesize[0];
+ const int uvstride= s->current_picture.linesize[1];
+ uint8_t *current_data[3]= { s->input_picture.data[0] + (x + y* stride)*block_w,
+ s->input_picture.data[1] + (x + y*uvstride)*block_w/2,
+ s->input_picture.data[2] + (x + y*uvstride)*block_w/2};
+ int P[10][2];
+ int16_t last_mv[3][2];
+ int qpel= !!(s->avctx->flags & CODEC_FLAG_QPEL); //unused
+ const int shift= 1+qpel;
+ MotionEstContext *c= &s->m.me;
+ int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
+ int mx_context= av_log2(2*FFABS(left->mx - top->mx));
+ int my_context= av_log2(2*FFABS(left->my - top->my));
+ int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
+ int ref, best_ref, ref_score, ref_mx, ref_my;
+
+ assert(sizeof(s->block_state) >= 256);
+ if(s->keyframe){
+ set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
+ return 0;
+ }
+
+// clip predictors / edge ?
+
+ P_LEFT[0]= left->mx;
+ P_LEFT[1]= left->my;
+ P_TOP [0]= top->mx;
+ P_TOP [1]= top->my;
+ P_TOPRIGHT[0]= tr->mx;
+ P_TOPRIGHT[1]= tr->my;
+
+ last_mv[0][0]= s->block[index].mx;
+ last_mv[0][1]= s->block[index].my;
+ last_mv[1][0]= right->mx;
+ last_mv[1][1]= right->my;
+ last_mv[2][0]= bottom->mx;
+ last_mv[2][1]= bottom->my;
+
+ s->m.mb_stride=2;
+ s->m.mb_x=
+ s->m.mb_y= 0;
+ c->skip= 0;
+
+ assert(c-> stride == stride);
+ assert(c->uvstride == uvstride);
+
+ c->penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_cmp);
+ c->sub_penalty_factor= get_penalty_factor(s->lambda, s->lambda2, c->avctx->me_sub_cmp);
+ c->mb_penalty_factor = get_penalty_factor(s->lambda, s->lambda2, c->avctx->mb_cmp);
+ c->current_mv_penalty= c->mv_penalty[s->m.f_code=1] + MAX_MV;
+
+ c->xmin = - x*block_w - 16+3;
+ c->ymin = - y*block_w - 16+3;
+ c->xmax = - (x+1)*block_w + (w<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
+ c->ymax = - (y+1)*block_w + (h<<(LOG2_MB_SIZE - s->block_max_depth)) + 16-3;
+
+ if(P_LEFT[0] > (c->xmax<<shift)) P_LEFT[0] = (c->xmax<<shift);
+ if(P_LEFT[1] > (c->ymax<<shift)) P_LEFT[1] = (c->ymax<<shift);
+ if(P_TOP[0] > (c->xmax<<shift)) P_TOP[0] = (c->xmax<<shift);
+ if(P_TOP[1] > (c->ymax<<shift)) P_TOP[1] = (c->ymax<<shift);
+ if(P_TOPRIGHT[0] < (c->xmin<<shift)) P_TOPRIGHT[0]= (c->xmin<<shift);
+ if(P_TOPRIGHT[0] > (c->xmax<<shift)) P_TOPRIGHT[0]= (c->xmax<<shift); //due to pmx no clip
+ if(P_TOPRIGHT[1] > (c->ymax<<shift)) P_TOPRIGHT[1]= (c->ymax<<shift);
+
+ P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
+ P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
+
+ if (!y) {
+ c->pred_x= P_LEFT[0];
+ c->pred_y= P_LEFT[1];
+ } else {
+ c->pred_x = P_MEDIAN[0];
+ c->pred_y = P_MEDIAN[1];
+ }
+
+ score= INT_MAX;
+ best_ref= 0;
+ for(ref=0; ref<s->ref_frames; ref++){
+ init_ref(c, current_data, s->last_picture[ref].data, NULL, block_w*x, block_w*y, 0);
+
+ ref_score= ff_epzs_motion_search(&s->m, &ref_mx, &ref_my, P, 0, /*ref_index*/ 0, last_mv,
+ (1<<16)>>shift, level-LOG2_MB_SIZE+4, block_w);
+
+ assert(ref_mx >= c->xmin);
+ assert(ref_mx <= c->xmax);
+ assert(ref_my >= c->ymin);
+ assert(ref_my <= c->ymax);
+
+ ref_score= c->sub_motion_search(&s->m, &ref_mx, &ref_my, ref_score, 0, 0, level-LOG2_MB_SIZE+4, block_w);
+ ref_score= ff_get_mb_score(&s->m, ref_mx, ref_my, 0, 0, level-LOG2_MB_SIZE+4, block_w, 0);
+ ref_score+= 2*av_log2(2*ref)*c->penalty_factor;
+ if(s->ref_mvs[ref]){
+ s->ref_mvs[ref][index][0]= ref_mx;
+ s->ref_mvs[ref][index][1]= ref_my;
+ s->ref_scores[ref][index]= ref_score;
+ }
+ if(score > ref_score){
+ score= ref_score;
+ best_ref= ref;
+ mx= ref_mx;
+ my= ref_my;
+ }
+ }
+ //FIXME if mb_cmp != SSE then intra cannot be compared currently and mb_penalty vs. lambda2
+
+ // subpel search
+ base_bits= get_rac_count(&s->c) - 8*(s->c.bytestream - s->c.bytestream_start);
+ pc= s->c;
+ pc.bytestream_start=
+ pc.bytestream= p_buffer; //FIXME end/start? and at the other stoo
+ memcpy(p_state, s->block_state, sizeof(s->block_state));
+
+ if(level!=s->block_max_depth)
+ put_rac(&pc, &p_state[4 + s_context], 1);
+ put_rac(&pc, &p_state[1 + left->type + top->type], 0);
+ if(s->ref_frames > 1)
+ put_symbol(&pc, &p_state[128 + 1024 + 32*ref_context], best_ref, 0);
+ pred_mv(s, &pmx, &pmy, best_ref, left, top, tr);
+ put_symbol(&pc, &p_state[128 + 32*(mx_context + 16*!!best_ref)], mx - pmx, 1);
+ put_symbol(&pc, &p_state[128 + 32*(my_context + 16*!!best_ref)], my - pmy, 1);
+ p_len= pc.bytestream - pc.bytestream_start;
+ score += (s->lambda2*(get_rac_count(&pc)-base_bits))>>FF_LAMBDA_SHIFT;
+
+ block_s= block_w*block_w;
+ sum = pix_sum(current_data[0], stride, block_w);
+ l= (sum + block_s/2)/block_s;
+ iscore = pix_norm1(current_data[0], stride, block_w) - 2*l*sum + l*l*block_s;
+
+ block_s= block_w*block_w>>2;
+ sum = pix_sum(current_data[1], uvstride, block_w>>1);
+ cb= (sum + block_s/2)/block_s;
+// iscore += pix_norm1(&current_mb[1][0], uvstride, block_w>>1) - 2*cb*sum + cb*cb*block_s;
+ sum = pix_sum(current_data[2], uvstride, block_w>>1);
+ cr= (sum + block_s/2)/block_s;
+// iscore += pix_norm1(&current_mb[2][0], uvstride, block_w>>1) - 2*cr*sum + cr*cr*block_s;
+
+ ic= s->c;
+ ic.bytestream_start=
+ ic.bytestream= i_buffer; //FIXME end/start? and at the other stoo
+ memcpy(i_state, s->block_state, sizeof(s->block_state));
+ if(level!=s->block_max_depth)
+ put_rac(&ic, &i_state[4 + s_context], 1);
+ put_rac(&ic, &i_state[1 + left->type + top->type], 1);
+ put_symbol(&ic, &i_state[32], l-pl , 1);
+ put_symbol(&ic, &i_state[64], cb-pcb, 1);
+ put_symbol(&ic, &i_state[96], cr-pcr, 1);
+ i_len= ic.bytestream - ic.bytestream_start;
+ iscore += (s->lambda2*(get_rac_count(&ic)-base_bits))>>FF_LAMBDA_SHIFT;
+
+// assert(score==256*256*256*64-1);
+ assert(iscore < 255*255*256 + s->lambda2*10);
+ assert(iscore >= 0);
+ assert(l>=0 && l<=255);
+ assert(pl>=0 && pl<=255);
+
+ if(level==0){
+ int varc= iscore >> 8;
+ int vard= score >> 8;
+ if (vard <= 64 || vard < varc)
+ c->scene_change_score+= ff_sqrt(vard) - ff_sqrt(varc);
+ else
+ c->scene_change_score+= s->m.qscale;
+ }
+
+ if(level!=s->block_max_depth){
+ put_rac(&s->c, &s->block_state[4 + s_context], 0);
+ score2 = encode_q_branch(s, level+1, 2*x+0, 2*y+0);
+ score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+0);
+ score2+= encode_q_branch(s, level+1, 2*x+0, 2*y+1);
+ score2+= encode_q_branch(s, level+1, 2*x+1, 2*y+1);
+ score2+= s->lambda2>>FF_LAMBDA_SHIFT; //FIXME exact split overhead
+
+ if(score2 < score && score2 < iscore)
+ return score2;
+ }
+
+ if(iscore < score){
+ pred_mv(s, &pmx, &pmy, 0, left, top, tr);
+ memcpy(pbbak, i_buffer, i_len);
+ s->c= ic;
+ s->c.bytestream_start= pbbak_start;
+ s->c.bytestream= pbbak + i_len;
+ set_blocks(s, level, x, y, l, cb, cr, pmx, pmy, 0, BLOCK_INTRA);
+ memcpy(s->block_state, i_state, sizeof(s->block_state));
+ return iscore;
+ }else{
+ memcpy(pbbak, p_buffer, p_len);
+ s->c= pc;
+ s->c.bytestream_start= pbbak_start;
+ s->c.bytestream= pbbak + p_len;
+ set_blocks(s, level, x, y, pl, pcb, pcr, mx, my, best_ref, 0);
+ memcpy(s->block_state, p_state, sizeof(s->block_state));
+ return score;
+ }
+}
+
+static void encode_q_branch2(SnowContext *s, int level, int x, int y){
+ const int w= s->b_width << s->block_max_depth;
+ const int rem_depth= s->block_max_depth - level;
+ const int index= (x + y*w) << rem_depth;
+ int trx= (x+1)<<rem_depth;
+ BlockNode *b= &s->block[index];
+ const BlockNode *left = x ? &s->block[index-1] : &null_block;
+ const BlockNode *top = y ? &s->block[index-w] : &null_block;
+ const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
+ const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
+ int pl = left->color[0];
+ int pcb= left->color[1];
+ int pcr= left->color[2];
+ int pmx, pmy;
+ int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
+ int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 16*!!b->ref;
+ int my_context= av_log2(2*FFABS(left->my - top->my)) + 16*!!b->ref;
+ int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
+
+ if(s->keyframe){
+ set_blocks(s, level, x, y, pl, pcb, pcr, 0, 0, 0, BLOCK_INTRA);
+ return;
+ }
+
+ if(level!=s->block_max_depth){
+ if(same_block(b,b+1) && same_block(b,b+w) && same_block(b,b+w+1)){
+ put_rac(&s->c, &s->block_state[4 + s_context], 1);
+ }else{
+ put_rac(&s->c, &s->block_state[4 + s_context], 0);
+ encode_q_branch2(s, level+1, 2*x+0, 2*y+0);
+ encode_q_branch2(s, level+1, 2*x+1, 2*y+0);
+ encode_q_branch2(s, level+1, 2*x+0, 2*y+1);
+ encode_q_branch2(s, level+1, 2*x+1, 2*y+1);
+ return;
+ }
+ }
+ if(b->type & BLOCK_INTRA){
+ pred_mv(s, &pmx, &pmy, 0, left, top, tr);
+ put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 1);
+ put_symbol(&s->c, &s->block_state[32], b->color[0]-pl , 1);
+ put_symbol(&s->c, &s->block_state[64], b->color[1]-pcb, 1);
+ put_symbol(&s->c, &s->block_state[96], b->color[2]-pcr, 1);
+ set_blocks(s, level, x, y, b->color[0], b->color[1], b->color[2], pmx, pmy, 0, BLOCK_INTRA);
+ }else{
+ pred_mv(s, &pmx, &pmy, b->ref, left, top, tr);
+ put_rac(&s->c, &s->block_state[1 + (left->type&1) + (top->type&1)], 0);
+ if(s->ref_frames > 1)
+ put_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], b->ref, 0);
+ put_symbol(&s->c, &s->block_state[128 + 32*mx_context], b->mx - pmx, 1);
+ put_symbol(&s->c, &s->block_state[128 + 32*my_context], b->my - pmy, 1);
+ set_blocks(s, level, x, y, pl, pcb, pcr, b->mx, b->my, b->ref, 0);
+ }
+}
+
+static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
+ int i, x2, y2;
+ Plane *p= &s->plane[plane_index];
+ const int block_size = MB_SIZE >> s->block_max_depth;
+ const int block_w = plane_index ? block_size/2 : block_size;
+ const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
+ const int obmc_stride= plane_index ? block_size : 2*block_size;
+ const int ref_stride= s->current_picture.linesize[plane_index];
+ uint8_t *src= s-> input_picture.data[plane_index];
+ IDWTELEM *dst= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4; //FIXME change to unsigned
+ const int b_stride = s->b_width << s->block_max_depth;
+ const int w= p->width;
+ const int h= p->height;
+ int index= mb_x + mb_y*b_stride;
+ BlockNode *b= &s->block[index];
+ BlockNode backup= *b;
+ int ab=0;
+ int aa=0;
+
+ b->type|= BLOCK_INTRA;
+ b->color[plane_index]= 0;
+ memset(dst, 0, obmc_stride*obmc_stride*sizeof(IDWTELEM));
+
+ for(i=0; i<4; i++){
+ int mb_x2= mb_x + (i &1) - 1;
+ int mb_y2= mb_y + (i>>1) - 1;
+ int x= block_w*mb_x2 + block_w/2;
+ int y= block_w*mb_y2 + block_w/2;
+
+ add_yblock(s, 0, NULL, dst + ((i&1)+(i>>1)*obmc_stride)*block_w, NULL, obmc,
+ x, y, block_w, block_w, w, h, obmc_stride, ref_stride, obmc_stride, mb_x2, mb_y2, 0, 0, plane_index);
+
+ for(y2= FFMAX(y, 0); y2<FFMIN(h, y+block_w); y2++){
+ for(x2= FFMAX(x, 0); x2<FFMIN(w, x+block_w); x2++){
+ int index= x2-(block_w*mb_x - block_w/2) + (y2-(block_w*mb_y - block_w/2))*obmc_stride;
+ int obmc_v= obmc[index];
+ int d;
+ if(y<0) obmc_v += obmc[index + block_w*obmc_stride];
+ if(x<0) obmc_v += obmc[index + block_w];
+ if(y+block_w>h) obmc_v += obmc[index - block_w*obmc_stride];
+ if(x+block_w>w) obmc_v += obmc[index - block_w];
+ //FIXME precalculate this or simplify it somehow else
+
+ d = -dst[index] + (1<<(FRAC_BITS-1));
+ dst[index] = d;
+ ab += (src[x2 + y2*ref_stride] - (d>>FRAC_BITS)) * obmc_v;
+ aa += obmc_v * obmc_v; //FIXME precalculate this
+ }
+ }
+ }
+ *b= backup;
+
+ return av_clip(((ab<<LOG2_OBMC_MAX) + aa/2)/aa, 0, 255); //FIXME we should not need clipping
+}
+
+static inline int get_block_bits(SnowContext *s, int x, int y, int w){
+ const int b_stride = s->b_width << s->block_max_depth;
+ const int b_height = s->b_height<< s->block_max_depth;
+ int index= x + y*b_stride;
+ const BlockNode *b = &s->block[index];
+ const BlockNode *left = x ? &s->block[index-1] : &null_block;
+ const BlockNode *top = y ? &s->block[index-b_stride] : &null_block;
+ const BlockNode *tl = y && x ? &s->block[index-b_stride-1] : left;
+ const BlockNode *tr = y && x+w<b_stride ? &s->block[index-b_stride+w] : tl;
+ int dmx, dmy;
+// int mx_context= av_log2(2*FFABS(left->mx - top->mx));
+// int my_context= av_log2(2*FFABS(left->my - top->my));
+
+ if(x<0 || x>=b_stride || y>=b_height)
+ return 0;
+/*
+1 0 0
+01X 1-2 1
+001XX 3-6 2-3
+0001XXX 7-14 4-7
+00001XXXX 15-30 8-15
+*/
+//FIXME try accurate rate
+//FIXME intra and inter predictors if surrounding blocks are not the same type
+ if(b->type & BLOCK_INTRA){
+ return 3+2*( av_log2(2*FFABS(left->color[0] - b->color[0]))
+ + av_log2(2*FFABS(left->color[1] - b->color[1]))
+ + av_log2(2*FFABS(left->color[2] - b->color[2])));
+ }else{
+ pred_mv(s, &dmx, &dmy, b->ref, left, top, tr);
+ dmx-= b->mx;
+ dmy-= b->my;
+ return 2*(1 + av_log2(2*FFABS(dmx)) //FIXME kill the 2* can be merged in lambda
+ + av_log2(2*FFABS(dmy))
+ + av_log2(2*b->ref));
+ }
+}
+
+static int get_block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index, const uint8_t *obmc_edged){
+ Plane *p= &s->plane[plane_index];
+ const int block_size = MB_SIZE >> s->block_max_depth;
+ const int block_w = plane_index ? block_size/2 : block_size;
+ const int obmc_stride= plane_index ? block_size : 2*block_size;
+ const int ref_stride= s->current_picture.linesize[plane_index];
+ uint8_t *dst= s->current_picture.data[plane_index];
+ uint8_t *src= s-> input_picture.data[plane_index];
+ IDWTELEM *pred= (IDWTELEM*)s->m.obmc_scratchpad + plane_index*block_size*block_size*4;
+ uint8_t *cur = s->scratchbuf;
+ uint8_t tmp[ref_stride*(2*MB_SIZE+HTAPS_MAX-1)];
+ const int b_stride = s->b_width << s->block_max_depth;
+ const int b_height = s->b_height<< s->block_max_depth;
+ const int w= p->width;
+ const int h= p->height;
+ int distortion;
+ int rate= 0;
+ const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
+ int sx= block_w*mb_x - block_w/2;
+ int sy= block_w*mb_y - block_w/2;
+ int x0= FFMAX(0,-sx);
+ int y0= FFMAX(0,-sy);
+ int x1= FFMIN(block_w*2, w-sx);
+ int y1= FFMIN(block_w*2, h-sy);
+ int i,x,y;
+
+ ff_snow_pred_block(s, cur, tmp, ref_stride, sx, sy, block_w*2, block_w*2, &s->block[mb_x + mb_y*b_stride], plane_index, w, h);
+
+ for(y=y0; y<y1; y++){
+ const uint8_t *obmc1= obmc_edged + y*obmc_stride;
+ const IDWTELEM *pred1 = pred + y*obmc_stride;
+ uint8_t *cur1 = cur + y*ref_stride;
+ uint8_t *dst1 = dst + sx + (sy+y)*ref_stride;
+ for(x=x0; x<x1; x++){
+#if FRAC_BITS >= LOG2_OBMC_MAX
+ int v = (cur1[x] * obmc1[x]) << (FRAC_BITS - LOG2_OBMC_MAX);
+#else
+ int v = (cur1[x] * obmc1[x] + (1<<(LOG2_OBMC_MAX - FRAC_BITS-1))) >> (LOG2_OBMC_MAX - FRAC_BITS);
+#endif
+ v = (v + pred1[x]) >> FRAC_BITS;
+ if(v&(~255)) v= ~(v>>31);
+ dst1[x] = v;
+ }
+ }
+
+ /* copy the regions where obmc[] = (uint8_t)256 */
+ if(LOG2_OBMC_MAX == 8
+ && (mb_x == 0 || mb_x == b_stride-1)
+ && (mb_y == 0 || mb_y == b_height-1)){
+ if(mb_x == 0)
+ x1 = block_w;
+ else
+ x0 = block_w;
+ if(mb_y == 0)
+ y1 = block_w;
+ else
+ y0 = block_w;
+ for(y=y0; y<y1; y++)
+ memcpy(dst + sx+x0 + (sy+y)*ref_stride, cur + x0 + y*ref_stride, x1-x0);
+ }
+
+ if(block_w==16){
+ /* FIXME rearrange dsputil to fit 32x32 cmp functions */
+ /* FIXME check alignment of the cmp wavelet vs the encoding wavelet */
+ /* FIXME cmps overlap but do not cover the wavelet's whole support.
+ * So improving the score of one block is not strictly guaranteed
+ * to improve the score of the whole frame, thus iterative motion
+ * estimation does not always converge. */
+ if(s->avctx->me_cmp == FF_CMP_W97)
+ distortion = ff_w97_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
+ else if(s->avctx->me_cmp == FF_CMP_W53)
+ distortion = ff_w53_32_c(&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, 32);
+ else{
+ distortion = 0;
+ for(i=0; i<4; i++){
+ int off = sx+16*(i&1) + (sy+16*(i>>1))*ref_stride;
+ distortion += s->dsp.me_cmp[0](&s->m, src + off, dst + off, ref_stride, 16);
+ }
+ }
+ }else{
+ assert(block_w==8);
+ distortion = s->dsp.me_cmp[0](&s->m, src + sx + sy*ref_stride, dst + sx + sy*ref_stride, ref_stride, block_w*2);
+ }
+
+ if(plane_index==0){
+ for(i=0; i<4; i++){
+/* ..RRr
+ * .RXx.
+ * rxx..
+ */
+ rate += get_block_bits(s, mb_x + (i&1) - (i>>1), mb_y + (i>>1), 1);
+ }
+ if(mb_x == b_stride-2)
+ rate += get_block_bits(s, mb_x + 1, mb_y + 1, 1);
+ }
+ return distortion + rate*penalty_factor;
+}
+
+static int get_4block_rd(SnowContext *s, int mb_x, int mb_y, int plane_index){
+ int i, y2;
+ Plane *p= &s->plane[plane_index];
+ const int block_size = MB_SIZE >> s->block_max_depth;
+ const int block_w = plane_index ? block_size/2 : block_size;
+ const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
+ const int obmc_stride= plane_index ? block_size : 2*block_size;
+ const int ref_stride= s->current_picture.linesize[plane_index];
+ uint8_t *dst= s->current_picture.data[plane_index];
+ uint8_t *src= s-> input_picture.data[plane_index];
+ //FIXME zero_dst is const but add_yblock changes dst if add is 0 (this is never the case for dst=zero_dst
+ // const has only been removed from zero_dst to suppress a warning
+ static IDWTELEM zero_dst[4096]; //FIXME
+ const int b_stride = s->b_width << s->block_max_depth;
+ const int w= p->width;
+ const int h= p->height;
+ int distortion= 0;
+ int rate= 0;
+ const int penalty_factor= get_penalty_factor(s->lambda, s->lambda2, s->avctx->me_cmp);
+
+ for(i=0; i<9; i++){
+ int mb_x2= mb_x + (i%3) - 1;
+ int mb_y2= mb_y + (i/3) - 1;
+ int x= block_w*mb_x2 + block_w/2;
+ int y= block_w*mb_y2 + block_w/2;
+
+ add_yblock(s, 0, NULL, zero_dst, dst, obmc,
+ x, y, block_w, block_w, w, h, /*dst_stride*/0, ref_stride, obmc_stride, mb_x2, mb_y2, 1, 1, plane_index);
+
+ //FIXME find a cleaner/simpler way to skip the outside stuff
+ for(y2= y; y2<0; y2++)
+ memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
+ for(y2= h; y2<y+block_w; y2++)
+ memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, block_w);
+ if(x<0){
+ for(y2= y; y2<y+block_w; y2++)
+ memcpy(dst + x + y2*ref_stride, src + x + y2*ref_stride, -x);
+ }
+ if(x+block_w > w){
+ for(y2= y; y2<y+block_w; y2++)
+ memcpy(dst + w + y2*ref_stride, src + w + y2*ref_stride, x+block_w - w);
+ }
+
+ assert(block_w== 8 || block_w==16);
+ distortion += s->dsp.me_cmp[block_w==8](&s->m, src + x + y*ref_stride, dst + x + y*ref_stride, ref_stride, block_w);
+ }
+
+ if(plane_index==0){
+ BlockNode *b= &s->block[mb_x+mb_y*b_stride];
+ int merged= same_block(b,b+1) && same_block(b,b+b_stride) && same_block(b,b+b_stride+1);
+
+/* ..RRRr
+ * .RXXx.
+ * .RXXx.
+ * rxxx.
+ */
+ if(merged)
+ rate = get_block_bits(s, mb_x, mb_y, 2);
+ for(i=merged?4:0; i<9; i++){
+ static const int dxy[9][2] = {{0,0},{1,0},{0,1},{1,1},{2,0},{2,1},{-1,2},{0,2},{1,2}};
+ rate += get_block_bits(s, mb_x + dxy[i][0], mb_y + dxy[i][1], 1);
+ }
+ }
+ return distortion + rate*penalty_factor;
+}
+
+static int encode_subband_c0run(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
+ const int w= b->width;
+ const int h= b->height;
+ int x, y;
+
+ if(1){
+ int run=0;
+ int runs[w*h];
+ int run_index=0;
+ int max_index;
+
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int v, p=0;
+ int /*ll=0, */l=0, lt=0, t=0, rt=0;
+ v= src[x + y*stride];
+
+ if(y){
+ t= src[x + (y-1)*stride];
+ if(x){
+ lt= src[x - 1 + (y-1)*stride];
+ }
+ if(x + 1 < w){
+ rt= src[x + 1 + (y-1)*stride];
+ }
+ }
+ if(x){
+ l= src[x - 1 + y*stride];
+ /*if(x > 1){
+ if(orientation==1) ll= src[y + (x-2)*stride];
+ else ll= src[x - 2 + y*stride];
+ }*/
+ }
+ if(parent){
+ int px= x>>1;
+ int py= y>>1;
+ if(px<b->parent->width && py<b->parent->height)
+ p= parent[px + py*2*stride];
+ }
+ if(!(/*ll|*/l|lt|t|rt|p)){
+ if(v){
+ runs[run_index++]= run;
+ run=0;
+ }else{
+ run++;
+ }
+ }
+ }
+ }
+ max_index= run_index;
+ runs[run_index++]= run;
+ run_index=0;
+ run= runs[run_index++];
+
+ put_symbol2(&s->c, b->state[30], max_index, 0);
+ if(run_index <= max_index)
+ put_symbol2(&s->c, b->state[1], run, 3);
+
+ for(y=0; y<h; y++){
+ if(s->c.bytestream_end - s->c.bytestream < w*40){
+ av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return -1;
+ }
+ for(x=0; x<w; x++){
+ int v, p=0;
+ int /*ll=0, */l=0, lt=0, t=0, rt=0;
+ v= src[x + y*stride];
+
+ if(y){
+ t= src[x + (y-1)*stride];
+ if(x){
+ lt= src[x - 1 + (y-1)*stride];
+ }
+ if(x + 1 < w){
+ rt= src[x + 1 + (y-1)*stride];
+ }
+ }
+ if(x){
+ l= src[x - 1 + y*stride];
+ /*if(x > 1){
+ if(orientation==1) ll= src[y + (x-2)*stride];
+ else ll= src[x - 2 + y*stride];
+ }*/
+ }
+ if(parent){
+ int px= x>>1;
+ int py= y>>1;
+ if(px<b->parent->width && py<b->parent->height)
+ p= parent[px + py*2*stride];
+ }
+ if(/*ll|*/l|lt|t|rt|p){
+ int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
+
+ put_rac(&s->c, &b->state[0][context], !!v);
+ }else{
+ if(!run){
+ run= runs[run_index++];
+
+ if(run_index <= max_index)
+ put_symbol2(&s->c, b->state[1], run, 3);
+ assert(v);
+ }else{
+ run--;
+ assert(!v);
+ }
+ }
+ if(v){
+ int context= av_log2(/*FFABS(ll) + */3*FFABS(l) + FFABS(lt) + 2*FFABS(t) + FFABS(rt) + FFABS(p));
+ int l2= 2*FFABS(l) + (l<0);
+ int t2= 2*FFABS(t) + (t<0);
+
+ put_symbol2(&s->c, b->state[context + 2], FFABS(v)-1, context-4);
+ put_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l2&0xFF] + 3*quant3bA[t2&0xFF]], v<0);
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+static int encode_subband(SnowContext *s, SubBand *b, IDWTELEM *src, IDWTELEM *parent, int stride, int orientation){
+// encode_subband_qtree(s, b, src, parent, stride, orientation);
+// encode_subband_z0run(s, b, src, parent, stride, orientation);
+ return encode_subband_c0run(s, b, src, parent, stride, orientation);
+// encode_subband_dzr(s, b, src, parent, stride, orientation);
+}
+
+static av_always_inline int check_block(SnowContext *s, int mb_x, int mb_y, int p[3], int intra, const uint8_t *obmc_edged, int *best_rd){
+ const int b_stride= s->b_width << s->block_max_depth;
+ BlockNode *block= &s->block[mb_x + mb_y * b_stride];
+ BlockNode backup= *block;
+ int rd, index, value;
+
+ assert(mb_x>=0 && mb_y>=0);
+ assert(mb_x<b_stride);
+
+ if(intra){
+ block->color[0] = p[0];
+ block->color[1] = p[1];
+ block->color[2] = p[2];
+ block->type |= BLOCK_INTRA;
+ }else{
+ index= (p[0] + 31*p[1]) & (ME_CACHE_SIZE-1);
+ value= s->me_cache_generation + (p[0]>>10) + (p[1]<<6) + (block->ref<<12);
+ if(s->me_cache[index] == value)
+ return 0;
+ s->me_cache[index]= value;
+
+ block->mx= p[0];
+ block->my= p[1];
+ block->type &= ~BLOCK_INTRA;
+ }
+
+ rd= get_block_rd(s, mb_x, mb_y, 0, obmc_edged);
+
+//FIXME chroma
+ if(rd < *best_rd){
+ *best_rd= rd;
+ return 1;
+ }else{
+ *block= backup;
+ return 0;
+ }
+}
+
+/* special case for int[2] args we discard afterwards,
+ * fixes compilation problem with gcc 2.95 */
+static av_always_inline int check_block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, const uint8_t *obmc_edged, int *best_rd){
+ int p[2] = {p0, p1};
+ return check_block(s, mb_x, mb_y, p, 0, obmc_edged, best_rd);
+}
+
+static av_always_inline int check_4block_inter(SnowContext *s, int mb_x, int mb_y, int p0, int p1, int ref, int *best_rd){
+ const int b_stride= s->b_width << s->block_max_depth;
+ BlockNode *block= &s->block[mb_x + mb_y * b_stride];
+ BlockNode backup[4]= {block[0], block[1], block[b_stride], block[b_stride+1]};
+ int rd, index, value;
+
+ assert(mb_x>=0 && mb_y>=0);
+ assert(mb_x<b_stride);
+ assert(((mb_x|mb_y)&1) == 0);
+
+ index= (p0 + 31*p1) & (ME_CACHE_SIZE-1);
+ value= s->me_cache_generation + (p0>>10) + (p1<<6) + (block->ref<<12);
+ if(s->me_cache[index] == value)
+ return 0;
+ s->me_cache[index]= value;
+
+ block->mx= p0;
+ block->my= p1;
+ block->ref= ref;
+ block->type &= ~BLOCK_INTRA;
+ block[1]= block[b_stride]= block[b_stride+1]= *block;
+
+ rd= get_4block_rd(s, mb_x, mb_y, 0);
+
+//FIXME chroma
+ if(rd < *best_rd){
+ *best_rd= rd;
+ return 1;
+ }else{
+ block[0]= backup[0];
+ block[1]= backup[1];
+ block[b_stride]= backup[2];
+ block[b_stride+1]= backup[3];
+ return 0;
+ }
+}
+
+static void iterative_me(SnowContext *s){
+ int pass, mb_x, mb_y;
+ const int b_width = s->b_width << s->block_max_depth;
+ const int b_height= s->b_height << s->block_max_depth;
+ const int b_stride= b_width;
+ int color[3];
+
+ {
+ RangeCoder r = s->c;
+ uint8_t state[sizeof(s->block_state)];
+ memcpy(state, s->block_state, sizeof(s->block_state));
+ for(mb_y= 0; mb_y<s->b_height; mb_y++)
+ for(mb_x= 0; mb_x<s->b_width; mb_x++)
+ encode_q_branch(s, 0, mb_x, mb_y);
+ s->c = r;
+ memcpy(s->block_state, state, sizeof(s->block_state));
+ }
+
+ for(pass=0; pass<25; pass++){
+ int change= 0;
+
+ for(mb_y= 0; mb_y<b_height; mb_y++){
+ for(mb_x= 0; mb_x<b_width; mb_x++){
+ int dia_change, i, j, ref;
+ int best_rd= INT_MAX, ref_rd;
+ BlockNode backup, ref_b;
+ const int index= mb_x + mb_y * b_stride;
+ BlockNode *block= &s->block[index];
+ BlockNode *tb = mb_y ? &s->block[index-b_stride ] : NULL;
+ BlockNode *lb = mb_x ? &s->block[index -1] : NULL;
+ BlockNode *rb = mb_x+1<b_width ? &s->block[index +1] : NULL;
+ BlockNode *bb = mb_y+1<b_height ? &s->block[index+b_stride ] : NULL;
+ BlockNode *tlb= mb_x && mb_y ? &s->block[index-b_stride-1] : NULL;
+ BlockNode *trb= mb_x+1<b_width && mb_y ? &s->block[index-b_stride+1] : NULL;
+ BlockNode *blb= mb_x && mb_y+1<b_height ? &s->block[index+b_stride-1] : NULL;
+ BlockNode *brb= mb_x+1<b_width && mb_y+1<b_height ? &s->block[index+b_stride+1] : NULL;
+ const int b_w= (MB_SIZE >> s->block_max_depth);
+ uint8_t obmc_edged[b_w*2][b_w*2];
+
+ if(pass && (block->type & BLOCK_OPT))
+ continue;
+ block->type |= BLOCK_OPT;
+
+ backup= *block;
+
+ if(!s->me_cache_generation)
+ memset(s->me_cache, 0, sizeof(s->me_cache));
+ s->me_cache_generation += 1<<22;
+
+ //FIXME precalculate
+ {
+ int x, y;
+ memcpy(obmc_edged, obmc_tab[s->block_max_depth], b_w*b_w*4);
+ if(mb_x==0)
+ for(y=0; y<b_w*2; y++)
+ memset(obmc_edged[y], obmc_edged[y][0] + obmc_edged[y][b_w-1], b_w);
+ if(mb_x==b_stride-1)
+ for(y=0; y<b_w*2; y++)
+ memset(obmc_edged[y]+b_w, obmc_edged[y][b_w] + obmc_edged[y][b_w*2-1], b_w);
+ if(mb_y==0){
+ for(x=0; x<b_w*2; x++)
+ obmc_edged[0][x] += obmc_edged[b_w-1][x];
+ for(y=1; y<b_w; y++)
+ memcpy(obmc_edged[y], obmc_edged[0], b_w*2);
+ }
+ if(mb_y==b_height-1){
+ for(x=0; x<b_w*2; x++)
+ obmc_edged[b_w*2-1][x] += obmc_edged[b_w][x];
+ for(y=b_w; y<b_w*2-1; y++)
+ memcpy(obmc_edged[y], obmc_edged[b_w*2-1], b_w*2);
+ }
+ }
+
+ //skip stuff outside the picture
+ if(mb_x==0 || mb_y==0 || mb_x==b_width-1 || mb_y==b_height-1){
+ uint8_t *src= s-> input_picture.data[0];
+ uint8_t *dst= s->current_picture.data[0];
+ const int stride= s->current_picture.linesize[0];
+ const int block_w= MB_SIZE >> s->block_max_depth;
+ const int sx= block_w*mb_x - block_w/2;
+ const int sy= block_w*mb_y - block_w/2;
+ const int w= s->plane[0].width;
+ const int h= s->plane[0].height;
+ int y;
+
+ for(y=sy; y<0; y++)
+ memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
+ for(y=h; y<sy+block_w*2; y++)
+ memcpy(dst + sx + y*stride, src + sx + y*stride, block_w*2);
+ if(sx<0){
+ for(y=sy; y<sy+block_w*2; y++)
+ memcpy(dst + sx + y*stride, src + sx + y*stride, -sx);
+ }
+ if(sx+block_w*2 > w){
+ for(y=sy; y<sy+block_w*2; y++)
+ memcpy(dst + w + y*stride, src + w + y*stride, sx+block_w*2 - w);
+ }
+ }
+
+ // intra(black) = neighbors' contribution to the current block
+ for(i=0; i<3; i++)
+ color[i]= get_dc(s, mb_x, mb_y, i);
+
+ // get previous score (cannot be cached due to OBMC)
+ if(pass > 0 && (block->type&BLOCK_INTRA)){
+ int color0[3]= {block->color[0], block->color[1], block->color[2]};
+ check_block(s, mb_x, mb_y, color0, 1, *obmc_edged, &best_rd);
+ }else
+ check_block_inter(s, mb_x, mb_y, block->mx, block->my, *obmc_edged, &best_rd);
+
+ ref_b= *block;
+ ref_rd= best_rd;
+ for(ref=0; ref < s->ref_frames; ref++){
+ int16_t (*mvr)[2]= &s->ref_mvs[ref][index];
+ if(s->ref_scores[ref][index] > s->ref_scores[ref_b.ref][index]*3/2) //FIXME tune threshold
+ continue;
+ block->ref= ref;
+ best_rd= INT_MAX;
+
+ check_block_inter(s, mb_x, mb_y, mvr[0][0], mvr[0][1], *obmc_edged, &best_rd);
+ check_block_inter(s, mb_x, mb_y, 0, 0, *obmc_edged, &best_rd);
+ if(tb)
+ check_block_inter(s, mb_x, mb_y, mvr[-b_stride][0], mvr[-b_stride][1], *obmc_edged, &best_rd);
+ if(lb)
+ check_block_inter(s, mb_x, mb_y, mvr[-1][0], mvr[-1][1], *obmc_edged, &best_rd);
+ if(rb)
+ check_block_inter(s, mb_x, mb_y, mvr[1][0], mvr[1][1], *obmc_edged, &best_rd);
+ if(bb)
+ check_block_inter(s, mb_x, mb_y, mvr[b_stride][0], mvr[b_stride][1], *obmc_edged, &best_rd);
+
+ /* fullpel ME */
+ //FIXME avoid subpel interpolation / round to nearest integer
+ do{
+ dia_change=0;
+ for(i=0; i<FFMAX(s->avctx->dia_size, 1); i++){
+ for(j=0; j<i; j++){
+ dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
+ dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
+ dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+4*(i-j), block->my-(4*j), *obmc_edged, &best_rd);
+ dia_change |= check_block_inter(s, mb_x, mb_y, block->mx-4*(i-j), block->my+(4*j), *obmc_edged, &best_rd);
+ }
+ }
+ }while(dia_change);
+ /* subpel ME */
+ do{
+ static const int square[8][2]= {{+1, 0},{-1, 0},{ 0,+1},{ 0,-1},{+1,+1},{-1,-1},{+1,-1},{-1,+1},};
+ dia_change=0;
+ for(i=0; i<8; i++)
+ dia_change |= check_block_inter(s, mb_x, mb_y, block->mx+square[i][0], block->my+square[i][1], *obmc_edged, &best_rd);
+ }while(dia_change);
+ //FIXME or try the standard 2 pass qpel or similar
+
+ mvr[0][0]= block->mx;
+ mvr[0][1]= block->my;
+ if(ref_rd > best_rd){
+ ref_rd= best_rd;
+ ref_b= *block;
+ }
+ }
+ best_rd= ref_rd;
+ *block= ref_b;
+ check_block(s, mb_x, mb_y, color, 1, *obmc_edged, &best_rd);
+ //FIXME RD style color selection
+ if(!same_block(block, &backup)){
+ if(tb ) tb ->type &= ~BLOCK_OPT;
+ if(lb ) lb ->type &= ~BLOCK_OPT;
+ if(rb ) rb ->type &= ~BLOCK_OPT;
+ if(bb ) bb ->type &= ~BLOCK_OPT;
+ if(tlb) tlb->type &= ~BLOCK_OPT;
+ if(trb) trb->type &= ~BLOCK_OPT;
+ if(blb) blb->type &= ~BLOCK_OPT;
+ if(brb) brb->type &= ~BLOCK_OPT;
+ change ++;
+ }
+ }
+ }
+ av_log(s->avctx, AV_LOG_ERROR, "pass:%d changed:%d\n", pass, change);
+ if(!change)
+ break;
+ }
+
+ if(s->block_max_depth == 1){
+ int change= 0;
+ for(mb_y= 0; mb_y<b_height; mb_y+=2){
+ for(mb_x= 0; mb_x<b_width; mb_x+=2){
+ int i;
+ int best_rd, init_rd;
+ const int index= mb_x + mb_y * b_stride;
+ BlockNode *b[4];
+
+ b[0]= &s->block[index];
+ b[1]= b[0]+1;
+ b[2]= b[0]+b_stride;
+ b[3]= b[2]+1;
+ if(same_block(b[0], b[1]) &&
+ same_block(b[0], b[2]) &&
+ same_block(b[0], b[3]))
+ continue;
+
+ if(!s->me_cache_generation)
+ memset(s->me_cache, 0, sizeof(s->me_cache));
+ s->me_cache_generation += 1<<22;
+
+ init_rd= best_rd= get_4block_rd(s, mb_x, mb_y, 0);
+
+ //FIXME more multiref search?
+ check_4block_inter(s, mb_x, mb_y,
+ (b[0]->mx + b[1]->mx + b[2]->mx + b[3]->mx + 2) >> 2,
+ (b[0]->my + b[1]->my + b[2]->my + b[3]->my + 2) >> 2, 0, &best_rd);
+
+ for(i=0; i<4; i++)
+ if(!(b[i]->type&BLOCK_INTRA))
+ check_4block_inter(s, mb_x, mb_y, b[i]->mx, b[i]->my, b[i]->ref, &best_rd);
+
+ if(init_rd != best_rd)
+ change++;
+ }
+ }
+ av_log(s->avctx, AV_LOG_ERROR, "pass:4mv changed:%d\n", change*4);
+ }
+}
+
+static void encode_blocks(SnowContext *s, int search){
+ int x, y;
+ int w= s->b_width;
+ int h= s->b_height;
+
+ if(s->avctx->me_method == ME_ITER && !s->keyframe && search)
+ iterative_me(s);
+
+ for(y=0; y<h; y++){
+ if(s->c.bytestream_end - s->c.bytestream < w*MB_SIZE*MB_SIZE*3){ //FIXME nicer limit
+ av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return;
+ }
+ for(x=0; x<w; x++){
+ if(s->avctx->me_method == ME_ITER || !search)
+ encode_q_branch2(s, 0, x, y);
+ else
+ encode_q_branch (s, 0, x, y);
+ }
+ }
+}
+
+static void quantize(SnowContext *s, SubBand *b, IDWTELEM *dst, DWTELEM *src, int stride, int bias){
+ const int w= b->width;
+ const int h= b->height;
+ const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
+ const int qmul= qexp[qlog&(QROOT-1)]<<((qlog>>QSHIFT) + ENCODER_EXTRA_BITS);
+ int x,y, thres1, thres2;
+
+ if(s->qlog == LOSSLESS_QLOG){
+ for(y=0; y<h; y++)
+ for(x=0; x<w; x++)
+ dst[x + y*stride]= src[x + y*stride];
+ return;
+ }
+
+ bias= bias ? 0 : (3*qmul)>>3;
+ thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
+ thres2= 2*thres1;
+
+ if(!bias){
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int i= src[x + y*stride];
+
+ if((unsigned)(i+thres1) > thres2){
+ if(i>=0){
+ i<<= QEXPSHIFT;
+ i/= qmul; //FIXME optimize
+ dst[x + y*stride]= i;
+ }else{
+ i= -i;
+ i<<= QEXPSHIFT;
+ i/= qmul; //FIXME optimize
+ dst[x + y*stride]= -i;
+ }
+ }else
+ dst[x + y*stride]= 0;
+ }
+ }
+ }else{
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int i= src[x + y*stride];
+
+ if((unsigned)(i+thres1) > thres2){
+ if(i>=0){
+ i<<= QEXPSHIFT;
+ i= (i + bias) / qmul; //FIXME optimize
+ dst[x + y*stride]= i;
+ }else{
+ i= -i;
+ i<<= QEXPSHIFT;
+ i= (i + bias) / qmul; //FIXME optimize
+ dst[x + y*stride]= -i;
+ }
+ }else
+ dst[x + y*stride]= 0;
+ }
+ }
+ }
+}
+
+static void dequantize(SnowContext *s, SubBand *b, IDWTELEM *src, int stride){
+ const int w= b->width;
+ const int h= b->height;
+ const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
+ const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
+ const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
+ int x,y;
+
+ if(s->qlog == LOSSLESS_QLOG) return;
+
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int i= src[x + y*stride];
+ if(i<0){
+ src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
+ }else if(i>0){
+ src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
+ }
+ }
+ }
+}
+
+static void decorrelate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
+ const int w= b->width;
+ const int h= b->height;
+ int x,y;
+
+ for(y=h-1; y>=0; y--){
+ for(x=w-1; x>=0; x--){
+ int i= x + y*stride;
+
+ if(x){
+ if(use_median){
+ if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
+ else src[i] -= src[i - 1];
+ }else{
+ if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
+ else src[i] -= src[i - 1];
+ }
+ }else{
+ if(y) src[i] -= src[i - stride];
+ }
+ }
+ }
+}
+
+static void correlate(SnowContext *s, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median){
+ const int w= b->width;
+ const int h= b->height;
+ int x,y;
+
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int i= x + y*stride;
+
+ if(x){
+ if(use_median){
+ if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
+ else src[i] += src[i - 1];
+ }else{
+ if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
+ else src[i] += src[i - 1];
+ }
+ }else{
+ if(y) src[i] += src[i - stride];
+ }
+ }
+ }
+}
+
+static void encode_qlogs(SnowContext *s){
+ int plane_index, level, orientation;
+
+ for(plane_index=0; plane_index<2; plane_index++){
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1:0; orientation<4; orientation++){
+ if(orientation==2) continue;
+ put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
+ }
+ }
+ }
+}
+
+static void encode_header(SnowContext *s){
+ int plane_index, i;
+ uint8_t kstate[32];
+
+ memset(kstate, MID_STATE, sizeof(kstate));
+
+ put_rac(&s->c, kstate, s->keyframe);
+ if(s->keyframe || s->always_reset){
+ ff_snow_reset_contexts(s);
+ s->last_spatial_decomposition_type=
+ s->last_qlog=
+ s->last_qbias=
+ s->last_mv_scale=
+ s->last_block_max_depth= 0;
+ for(plane_index=0; plane_index<2; plane_index++){
+ Plane *p= &s->plane[plane_index];
+ p->last_htaps=0;
+ p->last_diag_mc=0;
+ memset(p->last_hcoeff, 0, sizeof(p->last_hcoeff));
+ }
+ }
+ if(s->keyframe){
+ put_symbol(&s->c, s->header_state, s->version, 0);
+ put_rac(&s->c, s->header_state, s->always_reset);
+ put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
+ put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
+ put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
+ put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
+ put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
+ put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
+ put_rac(&s->c, s->header_state, s->spatial_scalability);
+// put_rac(&s->c, s->header_state, s->rate_scalability);
+ put_symbol(&s->c, s->header_state, s->max_ref_frames-1, 0);
+
+ encode_qlogs(s);
+ }
+
+ if(!s->keyframe){
+ int update_mc=0;
+ for(plane_index=0; plane_index<2; plane_index++){
+ Plane *p= &s->plane[plane_index];
+ update_mc |= p->last_htaps != p->htaps;
+ update_mc |= p->last_diag_mc != p->diag_mc;
+ update_mc |= !!memcmp(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
+ }
+ put_rac(&s->c, s->header_state, update_mc);
+ if(update_mc){
+ for(plane_index=0; plane_index<2; plane_index++){
+ Plane *p= &s->plane[plane_index];
+ put_rac(&s->c, s->header_state, p->diag_mc);
+ put_symbol(&s->c, s->header_state, p->htaps/2-1, 0);
+ for(i= p->htaps/2; i; i--)
+ put_symbol(&s->c, s->header_state, FFABS(p->hcoeff[i]), 0);
+ }
+ }
+ if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
+ put_rac(&s->c, s->header_state, 1);
+ put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
+ encode_qlogs(s);
+ }else
+ put_rac(&s->c, s->header_state, 0);
+ }
+
+ put_symbol(&s->c, s->header_state, s->spatial_decomposition_type - s->last_spatial_decomposition_type, 1);
+ put_symbol(&s->c, s->header_state, s->qlog - s->last_qlog , 1);
+ put_symbol(&s->c, s->header_state, s->mv_scale - s->last_mv_scale, 1);
+ put_symbol(&s->c, s->header_state, s->qbias - s->last_qbias , 1);
+ put_symbol(&s->c, s->header_state, s->block_max_depth - s->last_block_max_depth, 1);
+
+}
+
+static void update_last_header_values(SnowContext *s){
+ int plane_index;
+
+ if(!s->keyframe){
+ for(plane_index=0; plane_index<2; plane_index++){
+ Plane *p= &s->plane[plane_index];
+ p->last_diag_mc= p->diag_mc;
+ p->last_htaps = p->htaps;
+ memcpy(p->last_hcoeff, p->hcoeff, sizeof(p->hcoeff));
+ }
+ }
+
+ s->last_spatial_decomposition_type = s->spatial_decomposition_type;
+ s->last_qlog = s->qlog;
+ s->last_qbias = s->qbias;
+ s->last_mv_scale = s->mv_scale;
+ s->last_block_max_depth = s->block_max_depth;
+ s->last_spatial_decomposition_count = s->spatial_decomposition_count;
+}
+
+static int qscale2qlog(int qscale){
+ return rint(QROOT*log(qscale / (float)FF_QP2LAMBDA)/log(2))
+ + 61*QROOT/8; ///< 64 > 60
+}
+
+static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
+{
+ /* Estimate the frame's complexity as a sum of weighted dwt coefficients.
+ * FIXME we know exact mv bits at this point,
+ * but ratecontrol isn't set up to include them. */
+ uint32_t coef_sum= 0;
+ int level, orientation, delta_qlog;
+
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &s->plane[0].band[level][orientation];
+ IDWTELEM *buf= b->ibuf;
+ const int w= b->width;
+ const int h= b->height;
+ const int stride= b->stride;
+ const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
+ const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
+ const int qdiv= (1<<16)/qmul;
+ int x, y;
+ //FIXME this is ugly
+ for(y=0; y<h; y++)
+ for(x=0; x<w; x++)
+ buf[x+y*stride]= b->buf[x+y*stride];
+ if(orientation==0)
+ decorrelate(s, b, buf, stride, 1, 0);
+ for(y=0; y<h; y++)
+ for(x=0; x<w; x++)
+ coef_sum+= abs(buf[x+y*stride]) * qdiv >> 16;
+ }
+ }
+
+ /* ugly, ratecontrol just takes a sqrt again */
+ coef_sum = (uint64_t)coef_sum * coef_sum >> 16;
+ assert(coef_sum < INT_MAX);
+
+ if(pict->pict_type == AV_PICTURE_TYPE_I){
+ s->m.current_picture.mb_var_sum= coef_sum;
+ s->m.current_picture.mc_mb_var_sum= 0;
+ }else{
+ s->m.current_picture.mc_mb_var_sum= coef_sum;
+ s->m.current_picture.mb_var_sum= 0;
+ }
+
+ pict->quality= ff_rate_estimate_qscale(&s->m, 1);
+ if (pict->quality < 0)
+ return INT_MIN;
+ s->lambda= pict->quality * 3/2;
+ delta_qlog= qscale2qlog(pict->quality) - s->qlog;
+ s->qlog+= delta_qlog;
+ return delta_qlog;
+}
+
+static void calculate_visual_weight(SnowContext *s, Plane *p){
+ int width = p->width;
+ int height= p->height;
+ int level, orientation, x, y;
+
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+ IDWTELEM *ibuf= b->ibuf;
+ int64_t error=0;
+
+ memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
+ ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
+ ff_spatial_idwt(s->spatial_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
+ for(y=0; y<height; y++){
+ for(x=0; x<width; x++){
+ int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
+ error += d*d;
+ }
+ }
+
+ b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
+ }
+ }
+}
+
+static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
+ SnowContext *s = avctx->priv_data;
+ RangeCoder * const c= &s->c;
+ AVFrame *pict = data;
+ const int width= s->avctx->width;
+ const int height= s->avctx->height;
+ int level, orientation, plane_index, i, y;
+ uint8_t rc_header_bak[sizeof(s->header_state)];
+ uint8_t rc_block_bak[sizeof(s->block_state)];
+
+ ff_init_range_encoder(c, buf, buf_size);
+ ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
+
+ for(i=0; i<3; i++){
+ int shift= !!i;
+ for(y=0; y<(height>>shift); y++)
+ memcpy(&s->input_picture.data[i][y * s->input_picture.linesize[i]],
+ &pict->data[i][y * pict->linesize[i]],
+ width>>shift);
+ }
+ s->new_picture = *pict;
+
+ s->m.picture_number= avctx->frame_number;
+ if(avctx->flags&CODEC_FLAG_PASS2){
+ s->m.pict_type =
+ pict->pict_type= s->m.rc_context.entry[avctx->frame_number].new_pict_type;
+ s->keyframe= pict->pict_type==AV_PICTURE_TYPE_I;
+ if(!(avctx->flags&CODEC_FLAG_QSCALE)) {
+ pict->quality= ff_rate_estimate_qscale(&s->m, 0);
+ if (pict->quality < 0)
+ return -1;
+ }
+ }else{
+ s->keyframe= avctx->gop_size==0 || avctx->frame_number % avctx->gop_size == 0;
+ s->m.pict_type=
+ pict->pict_type= s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
+ }
+
+ if(s->pass1_rc && avctx->frame_number == 0)
+ pict->quality= 2*FF_QP2LAMBDA;
+ if(pict->quality){
+ s->qlog= qscale2qlog(pict->quality);
+ s->lambda = pict->quality * 3/2;
+ }
+ if(s->qlog < 0 || (!pict->quality && (avctx->flags & CODEC_FLAG_QSCALE))){
+ s->qlog= LOSSLESS_QLOG;
+ s->lambda = 0;
+ }//else keep previous frame's qlog until after motion estimation
+
+ ff_snow_frame_start(s);
+
+ s->m.current_picture_ptr= &s->m.current_picture;
+ s->m.last_picture.f.pts = s->m.current_picture.f.pts;
+ s->m.current_picture.f.pts = pict->pts;
+ if(pict->pict_type == AV_PICTURE_TYPE_P){
+ int block_width = (width +15)>>4;
+ int block_height= (height+15)>>4;
+ int stride= s->current_picture.linesize[0];
+
+ assert(s->current_picture.data[0]);
+ assert(s->last_picture[0].data[0]);
+
+ s->m.avctx= s->avctx;
+ s->m.current_picture.f.data[0] = s->current_picture.data[0];
+ s->m. last_picture.f.data[0] = s->last_picture[0].data[0];
+ s->m. new_picture.f.data[0] = s-> input_picture.data[0];
+ s->m. last_picture_ptr= &s->m. last_picture;
+ s->m.linesize=
+ s->m. last_picture.f.linesize[0] =
+ s->m. new_picture.f.linesize[0] =
+ s->m.current_picture.f.linesize[0] = stride;
+ s->m.uvlinesize= s->current_picture.linesize[1];
+ s->m.width = width;
+ s->m.height= height;
+ s->m.mb_width = block_width;
+ s->m.mb_height= block_height;
+ s->m.mb_stride= s->m.mb_width+1;
+ s->m.b8_stride= 2*s->m.mb_width+1;
+ s->m.f_code=1;
+ s->m.pict_type= pict->pict_type;
+ s->m.me_method= s->avctx->me_method;
+ s->m.me.scene_change_score=0;
+ s->m.flags= s->avctx->flags;
+ s->m.quarter_sample= (s->avctx->flags & CODEC_FLAG_QPEL)!=0;
+ s->m.out_format= FMT_H263;
+ s->m.unrestricted_mv= 1;
+
+ s->m.lambda = s->lambda;
+ s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
+ s->lambda2= s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
+
+ s->m.dsp= s->dsp; //move
+ ff_init_me(&s->m);
+ s->dsp= s->m.dsp;
+ }
+
+ if(s->pass1_rc){
+ memcpy(rc_header_bak, s->header_state, sizeof(s->header_state));
+ memcpy(rc_block_bak, s->block_state, sizeof(s->block_state));
+ }
+
+redo_frame:
+
+ if(pict->pict_type == AV_PICTURE_TYPE_I)
+ s->spatial_decomposition_count= 5;
+ else
+ s->spatial_decomposition_count= 5;
+
+ s->m.pict_type = pict->pict_type;
+ s->qbias= pict->pict_type == AV_PICTURE_TYPE_P ? 2 : 0;
+
+ ff_snow_common_init_after_header(avctx);
+
+ if(s->last_spatial_decomposition_count != s->spatial_decomposition_count){
+ for(plane_index=0; plane_index<3; plane_index++){
+ calculate_visual_weight(s, &s->plane[plane_index]);
+ }
+ }
+
+ encode_header(s);
+ s->m.misc_bits = 8*(s->c.bytestream - s->c.bytestream_start);
+ encode_blocks(s, 1);
+ s->m.mv_bits = 8*(s->c.bytestream - s->c.bytestream_start) - s->m.misc_bits;
+
+ for(plane_index=0; plane_index<3; plane_index++){
+ Plane *p= &s->plane[plane_index];
+ int w= p->width;
+ int h= p->height;
+ int x, y;
+// int bits= put_bits_count(&s->c.pb);
+
+ if (!s->memc_only) {
+ //FIXME optimize
+ if(pict->data[plane_index]) //FIXME gray hack
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ s->spatial_idwt_buffer[y*w + x]= pict->data[plane_index][y*pict->linesize[plane_index] + x]<<FRAC_BITS;
+ }
+ }
+ predict_plane(s, s->spatial_idwt_buffer, plane_index, 0);
+
+ if( plane_index==0
+ && pict->pict_type == AV_PICTURE_TYPE_P
+ && !(avctx->flags&CODEC_FLAG_PASS2)
+ && s->m.me.scene_change_score > s->avctx->scenechange_threshold){
+ ff_init_range_encoder(c, buf, buf_size);
+ ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
+ pict->pict_type= AV_PICTURE_TYPE_I;
+ s->keyframe=1;
+ s->current_picture.key_frame=1;
+ goto redo_frame;
+ }
+
+ if(s->qlog == LOSSLESS_QLOG){
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ s->spatial_dwt_buffer[y*w + x]= (s->spatial_idwt_buffer[y*w + x] + (1<<(FRAC_BITS-1))-1)>>FRAC_BITS;
+ }
+ }
+ }else{
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ s->spatial_dwt_buffer[y*w + x]=s->spatial_idwt_buffer[y*w + x]<<ENCODER_EXTRA_BITS;
+ }
+ }
+ }
+
+ /* if(QUANTIZE2)
+ dwt_quantize(s, p, s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type);
+ else*/
+ ff_spatial_dwt(s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
+
+ if(s->pass1_rc && plane_index==0){
+ int delta_qlog = ratecontrol_1pass(s, pict);
+ if (delta_qlog <= INT_MIN)
+ return -1;
+ if(delta_qlog){
+ //reordering qlog in the bitstream would eliminate this reset
+ ff_init_range_encoder(c, buf, buf_size);
+ memcpy(s->header_state, rc_header_bak, sizeof(s->header_state));
+ memcpy(s->block_state, rc_block_bak, sizeof(s->block_state));
+ encode_header(s);
+ encode_blocks(s, 0);
+ }
+ }
+
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+
+ if(!QUANTIZE2)
+ quantize(s, b, b->ibuf, b->buf, b->stride, s->qbias);
+ if(orientation==0)
+ decorrelate(s, b, b->ibuf, b->stride, pict->pict_type == AV_PICTURE_TYPE_P, 0);
+ encode_subband(s, b, b->ibuf, b->parent ? b->parent->ibuf : NULL, b->stride, orientation);
+ assert(b->parent==NULL || b->parent->stride == b->stride*2);
+ if(orientation==0)
+ correlate(s, b, b->ibuf, b->stride, 1, 0);
+ }
+ }
+
+ for(level=0; level<s->spatial_decomposition_count; level++){
+ for(orientation=level ? 1 : 0; orientation<4; orientation++){
+ SubBand *b= &p->band[level][orientation];
+
+ dequantize(s, b, b->ibuf, b->stride);
+ }
+ }
+
+ ff_spatial_idwt(s->spatial_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
+ if(s->qlog == LOSSLESS_QLOG){
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ s->spatial_idwt_buffer[y*w + x]<<=FRAC_BITS;
+ }
+ }
+ }
+ predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
+ }else{
+ //ME/MC only
+ if(pict->pict_type == AV_PICTURE_TYPE_I){
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x]=
+ pict->data[plane_index][y*pict->linesize[plane_index] + x];
+ }
+ }
+ }else{
+ memset(s->spatial_idwt_buffer, 0, sizeof(IDWTELEM)*w*h);
+ predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
+ }
+ }
+ if(s->avctx->flags&CODEC_FLAG_PSNR){
+ int64_t error= 0;
+
+ if(pict->data[plane_index]) //FIXME gray hack
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int d= s->current_picture.data[plane_index][y*s->current_picture.linesize[plane_index] + x] - pict->data[plane_index][y*pict->linesize[plane_index] + x];
+ error += d*d;
+ }
+ }
+ s->avctx->error[plane_index] += error;
+ s->current_picture.error[plane_index] = error;
+ }
+
+ }
+
+ update_last_header_values(s);
+
+ ff_snow_release_buffer(avctx);
+
+ s->current_picture.coded_picture_number = avctx->frame_number;
+ s->current_picture.pict_type = pict->pict_type;
+ s->current_picture.quality = pict->quality;
+ s->m.frame_bits = 8*(s->c.bytestream - s->c.bytestream_start);
+ s->m.p_tex_bits = s->m.frame_bits - s->m.misc_bits - s->m.mv_bits;
+ s->m.current_picture.f.display_picture_number =
+ s->m.current_picture.f.coded_picture_number = avctx->frame_number;
+ s->m.current_picture.f.quality = pict->quality;
+ s->m.total_bits += 8*(s->c.bytestream - s->c.bytestream_start);
+ if(s->pass1_rc)
+ if (ff_rate_estimate_qscale(&s->m, 0) < 0)
+ return -1;
+ if(avctx->flags&CODEC_FLAG_PASS1)
+ ff_write_pass1_stats(&s->m);
+ s->m.last_pict_type = s->m.pict_type;
+ avctx->frame_bits = s->m.frame_bits;
+ avctx->mv_bits = s->m.mv_bits;
+ avctx->misc_bits = s->m.misc_bits;
+ avctx->p_tex_bits = s->m.p_tex_bits;
+
+ emms_c();
+
+ return ff_rac_terminate(c);
+}
+
+static av_cold int encode_end(AVCodecContext *avctx)
+{
+ SnowContext *s = avctx->priv_data;
+
+ ff_snow_common_end(s);
+ if (s->input_picture.data[0])
+ avctx->release_buffer(avctx, &s->input_picture);
+ av_free(avctx->stats_out);
+
+ return 0;
+}
+
+#define OFFSET(x) offsetof(SnowContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "memc_only", "Only do ME/MC (I frames -> ref, P frame -> ME+MC).", OFFSET(memc_only), AV_OPT_TYPE_INT, { 0 }, 0, 1, VE },
+ { NULL },
+};
+
+static const AVClass snowenc_class = {
+ .class_name = "snow encoder",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_snow_encoder = {
+ .name = "snow",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_SNOW,
+ .priv_data_size = sizeof(SnowContext),
+ .init = encode_init,
+ .encode = encode_frame,
+ .close = encode_end,
+ .long_name = NULL_IF_CONFIG_SMALL("Snow"),
+ .priv_class = &snowenc_class,
+};
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 00:25:25 +0000