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authorAurelien Jacobs <aurel@gnuage.org>2007-07-06 15:19:35 +0000
committerAurelien Jacobs <aurel@gnuage.org>2007-07-06 15:19:35 +0000
commit5416616588e521311c863a89b69392ba9856b45e (patch)
tree43a4e30e71afa371e0206fa7d1f61810a54b036e /libavcodec/svq1enc.c
parentb54bb84c3667763f438f6b66d22edf248975188d (diff)
downloadffmpeg-5416616588e521311c863a89b69392ba9856b45e.tar.gz
split SVQ1 decoder and encoder in their own files
Originally committed as revision 9507 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/svq1enc.c')
-rw-r--r--libavcodec/svq1enc.c588
1 files changed, 588 insertions, 0 deletions
diff --git a/libavcodec/svq1enc.c b/libavcodec/svq1enc.c
new file mode 100644
index 0000000000..5345ed6dcf
--- /dev/null
+++ b/libavcodec/svq1enc.c
@@ -0,0 +1,588 @@
+/*
+ * SVQ1 Encoder
+ * Copyright (C) 2004 Mike Melanson <melanson@pcisys.net>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file svq1enc.c
+ * Sorenson Vector Quantizer #1 (SVQ1) video codec.
+ * For more information of the SVQ1 algorithm, visit:
+ * http://www.pcisys.net/~melanson/codecs/
+ */
+
+
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+
+#include "svq1.h"
+#include "svq1enc_cb.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+
+typedef struct SVQ1Context {
+ MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to make the motion estimation eventually independent of MpegEncContext, so this will be removed then (FIXME/XXX)
+ AVCodecContext *avctx;
+ DSPContext dsp;
+ AVFrame picture;
+ AVFrame current_picture;
+ AVFrame last_picture;
+ PutBitContext pb;
+ GetBitContext gb;
+
+ PutBitContext reorder_pb[6]; //why ooh why this sick breadth first order, everything is slower and more complex
+
+ int frame_width;
+ int frame_height;
+
+ /* Y plane block dimensions */
+ int y_block_width;
+ int y_block_height;
+
+ /* U & V plane (C planes) block dimensions */
+ int c_block_width;
+ int c_block_height;
+
+ uint16_t *mb_type;
+ uint32_t *dummy;
+ int16_t (*motion_val8[3])[2];
+ int16_t (*motion_val16[3])[2];
+
+ int64_t rd_total;
+} SVQ1Context;
+
+static void svq1_write_header(SVQ1Context *s, int frame_type)
+{
+ int i;
+
+ /* frame code */
+ put_bits(&s->pb, 22, 0x20);
+
+ /* temporal reference (sure hope this is a "don't care") */
+ put_bits(&s->pb, 8, 0x00);
+
+ /* frame type */
+ put_bits(&s->pb, 2, frame_type - 1);
+
+ if (frame_type == I_TYPE) {
+
+ /* no checksum since frame code is 0x20 */
+
+ /* no embedded string either */
+
+ /* output 5 unknown bits (2 + 2 + 1) */
+ put_bits(&s->pb, 5, 2); /* 2 needed by quicktime decoder */
+
+ for (i = 0; i < 7; i++)
+ {
+ if ((ff_svq1_frame_size_table[i].width == s->frame_width) &&
+ (ff_svq1_frame_size_table[i].height == s->frame_height))
+ {
+ put_bits(&s->pb, 3, i);
+ break;
+ }
+ }
+
+ if (i == 7)
+ {
+ put_bits(&s->pb, 3, 7);
+ put_bits(&s->pb, 12, s->frame_width);
+ put_bits(&s->pb, 12, s->frame_height);
+ }
+ }
+
+ /* no checksum or extra data (next 2 bits get 0) */
+ put_bits(&s->pb, 2, 0);
+}
+
+
+#define QUALITY_THRESHOLD 100
+#define THRESHOLD_MULTIPLIER 0.6
+
+#if defined(HAVE_ALTIVEC)
+#undef vector
+#endif
+
+static int encode_block(SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *decoded, int stride, int level, int threshold, int lambda, int intra){
+ int count, y, x, i, j, split, best_mean, best_score, best_count;
+ int best_vector[6];
+ int block_sum[7]= {0, 0, 0, 0, 0, 0};
+ int w= 2<<((level+2)>>1);
+ int h= 2<<((level+1)>>1);
+ int size=w*h;
+ int16_t block[7][256];
+ const int8_t *codebook_sum, *codebook;
+ const uint16_t (*mean_vlc)[2];
+ const uint8_t (*multistage_vlc)[2];
+
+ best_score=0;
+ //FIXME optimize, this doenst need to be done multiple times
+ if(intra){
+ codebook_sum= svq1_intra_codebook_sum[level];
+ codebook= ff_svq1_intra_codebooks[level];
+ mean_vlc= ff_svq1_intra_mean_vlc;
+ multistage_vlc= ff_svq1_intra_multistage_vlc[level];
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int v= src[x + y*stride];
+ block[0][x + w*y]= v;
+ best_score += v*v;
+ block_sum[0] += v;
+ }
+ }
+ }else{
+ codebook_sum= svq1_inter_codebook_sum[level];
+ codebook= ff_svq1_inter_codebooks[level];
+ mean_vlc= ff_svq1_inter_mean_vlc + 256;
+ multistage_vlc= ff_svq1_inter_multistage_vlc[level];
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ int v= src[x + y*stride] - ref[x + y*stride];
+ block[0][x + w*y]= v;
+ best_score += v*v;
+ block_sum[0] += v;
+ }
+ }
+ }
+
+ best_count=0;
+ best_score -= ((block_sum[0]*block_sum[0])>>(level+3));
+ best_mean= (block_sum[0] + (size>>1)) >> (level+3);
+
+ if(level<4){
+ for(count=1; count<7; count++){
+ int best_vector_score= INT_MAX;
+ int best_vector_sum=-999, best_vector_mean=-999;
+ const int stage= count-1;
+ const int8_t *vector;
+
+ for(i=0; i<16; i++){
+ int sum= codebook_sum[stage*16 + i];
+ int sqr, diff, score;
+
+ vector = codebook + stage*size*16 + i*size;
+ sqr = s->dsp.ssd_int8_vs_int16(vector, block[stage], size);
+ diff= block_sum[stage] - sum;
+ score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow
+ if(score < best_vector_score){
+ int mean= (diff + (size>>1)) >> (level+3);
+ assert(mean >-300 && mean<300);
+ mean= av_clip(mean, intra?0:-256, 255);
+ best_vector_score= score;
+ best_vector[stage]= i;
+ best_vector_sum= sum;
+ best_vector_mean= mean;
+ }
+ }
+ assert(best_vector_mean != -999);
+ vector= codebook + stage*size*16 + best_vector[stage]*size;
+ for(j=0; j<size; j++){
+ block[stage+1][j] = block[stage][j] - vector[j];
+ }
+ block_sum[stage+1]= block_sum[stage] - best_vector_sum;
+ best_vector_score +=
+ lambda*(+ 1 + 4*count
+ + multistage_vlc[1+count][1]
+ + mean_vlc[best_vector_mean][1]);
+
+ if(best_vector_score < best_score){
+ best_score= best_vector_score;
+ best_count= count;
+ best_mean= best_vector_mean;
+ }
+ }
+ }
+
+ split=0;
+ if(best_score > threshold && level){
+ int score=0;
+ int offset= (level&1) ? stride*h/2 : w/2;
+ PutBitContext backup[6];
+
+ for(i=level-1; i>=0; i--){
+ backup[i]= s->reorder_pb[i];
+ }
+ score += encode_block(s, src , ref , decoded , stride, level-1, threshold>>1, lambda, intra);
+ score += encode_block(s, src + offset, ref + offset, decoded + offset, stride, level-1, threshold>>1, lambda, intra);
+ score += lambda;
+
+ if(score < best_score){
+ best_score= score;
+ split=1;
+ }else{
+ for(i=level-1; i>=0; i--){
+ s->reorder_pb[i]= backup[i];
+ }
+ }
+ }
+ if (level > 0)
+ put_bits(&s->reorder_pb[level], 1, split);
+
+ if(!split){
+ assert((best_mean >= 0 && best_mean<256) || !intra);
+ assert(best_mean >= -256 && best_mean<256);
+ assert(best_count >=0 && best_count<7);
+ assert(level<4 || best_count==0);
+
+ /* output the encoding */
+ put_bits(&s->reorder_pb[level],
+ multistage_vlc[1 + best_count][1],
+ multistage_vlc[1 + best_count][0]);
+ put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
+ mean_vlc[best_mean][0]);
+
+ for (i = 0; i < best_count; i++){
+ assert(best_vector[i]>=0 && best_vector[i]<16);
+ put_bits(&s->reorder_pb[level], 4, best_vector[i]);
+ }
+
+ for(y=0; y<h; y++){
+ for(x=0; x<w; x++){
+ decoded[x + y*stride]= src[x + y*stride] - block[best_count][x + w*y] + best_mean;
+ }
+ }
+ }
+
+ return best_score;
+}
+
+
+static int svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
+ int width, int height, int src_stride, int stride)
+{
+ int x, y;
+ int i;
+ int block_width, block_height;
+ int level;
+ int threshold[6];
+ const int lambda= (s->picture.quality*s->picture.quality) >> (2*FF_LAMBDA_SHIFT);
+
+ /* figure out the acceptable level thresholds in advance */
+ threshold[5] = QUALITY_THRESHOLD;
+ for (level = 4; level >= 0; level--)
+ threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;
+
+ block_width = (width + 15) / 16;
+ block_height = (height + 15) / 16;
+
+ if(s->picture.pict_type == P_TYPE){
+ s->m.avctx= s->avctx;
+ s->m.current_picture_ptr= &s->m.current_picture;
+ s->m.last_picture_ptr = &s->m.last_picture;
+ s->m.last_picture.data[0]= ref_plane;
+ s->m.linesize=
+ s->m.last_picture.linesize[0]=
+ s->m.new_picture.linesize[0]=
+ s->m.current_picture.linesize[0]= stride;
+ 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= s->picture.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.out_format = FMT_H263;
+// s->m.unrestricted_mv= 1;
+
+ s->m.lambda= s->picture.quality;
+ s->m.qscale= (s->m.lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
+ s->m.lambda2= (s->m.lambda*s->m.lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
+
+ if(!s->motion_val8[plane]){
+ s->motion_val8 [plane]= av_mallocz((s->m.b8_stride*block_height*2 + 2)*2*sizeof(int16_t));
+ s->motion_val16[plane]= av_mallocz((s->m.mb_stride*(block_height + 2) + 1)*2*sizeof(int16_t));
+ }
+
+ s->m.mb_type= s->mb_type;
+
+ //dummies, to avoid segfaults
+ s->m.current_picture.mb_mean= (uint8_t *)s->dummy;
+ s->m.current_picture.mb_var= (uint16_t*)s->dummy;
+ s->m.current_picture.mc_mb_var= (uint16_t*)s->dummy;
+ s->m.current_picture.mb_type= s->dummy;
+
+ s->m.current_picture.motion_val[0]= s->motion_val8[plane] + 2;
+ s->m.p_mv_table= s->motion_val16[plane] + s->m.mb_stride + 1;
+ s->m.dsp= s->dsp; //move
+ ff_init_me(&s->m);
+
+ s->m.me.dia_size= s->avctx->dia_size;
+ s->m.first_slice_line=1;
+ for (y = 0; y < block_height; y++) {
+ uint8_t src[stride*16];
+
+ s->m.new_picture.data[0]= src - y*16*stride; //ugly
+ s->m.mb_y= y;
+
+ for(i=0; i<16 && i + 16*y<height; i++){
+ memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
+ for(x=width; x<16*block_width; x++)
+ src[i*stride+x]= src[i*stride+x-1];
+ }
+ for(; i<16 && i + 16*y<16*block_height; i++)
+ memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
+
+ for (x = 0; x < block_width; x++) {
+ s->m.mb_x= x;
+ ff_init_block_index(&s->m);
+ ff_update_block_index(&s->m);
+
+ ff_estimate_p_frame_motion(&s->m, x, y);
+ }
+ s->m.first_slice_line=0;
+ }
+
+ ff_fix_long_p_mvs(&s->m);
+ ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code, CANDIDATE_MB_TYPE_INTER, 0);
+ }
+
+ s->m.first_slice_line=1;
+ for (y = 0; y < block_height; y++) {
+ uint8_t src[stride*16];
+
+ for(i=0; i<16 && i + 16*y<height; i++){
+ memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
+ for(x=width; x<16*block_width; x++)
+ src[i*stride+x]= src[i*stride+x-1];
+ }
+ for(; i<16 && i + 16*y<16*block_height; i++)
+ memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
+
+ s->m.mb_y= y;
+ for (x = 0; x < block_width; x++) {
+ uint8_t reorder_buffer[3][6][7*32];
+ int count[3][6];
+ int offset = y * 16 * stride + x * 16;
+ uint8_t *decoded= decoded_plane + offset;
+ uint8_t *ref= ref_plane + offset;
+ int score[4]={0,0,0,0}, best;
+ uint8_t temp[16*stride];
+
+ if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 3000){ //FIXME check size
+ av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+ return -1;
+ }
+
+ s->m.mb_x= x;
+ ff_init_block_index(&s->m);
+ ff_update_block_index(&s->m);
+
+ if(s->picture.pict_type == I_TYPE || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){
+ for(i=0; i<6; i++){
+ init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
+ }
+ if(s->picture.pict_type == P_TYPE){
+ const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
+ put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
+ score[0]= vlc[1]*lambda;
+ }
+ score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);
+ for(i=0; i<6; i++){
+ count[0][i]= put_bits_count(&s->reorder_pb[i]);
+ flush_put_bits(&s->reorder_pb[i]);
+ }
+ }else
+ score[0]= INT_MAX;
+
+ best=0;
+
+ if(s->picture.pict_type == P_TYPE){
+ const uint8_t *vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_INTER];
+ int mx, my, pred_x, pred_y, dxy;
+ int16_t *motion_ptr;
+
+ motion_ptr= h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
+ if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){
+ for(i=0; i<6; i++)
+ init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
+
+ put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
+
+ s->m.pb= s->reorder_pb[5];
+ mx= motion_ptr[0];
+ my= motion_ptr[1];
+ assert(mx>=-32 && mx<=31);
+ assert(my>=-32 && my<=31);
+ assert(pred_x>=-32 && pred_x<=31);
+ assert(pred_y>=-32 && pred_y<=31);
+ ff_h263_encode_motion(&s->m, mx - pred_x, 1);
+ ff_h263_encode_motion(&s->m, my - pred_y, 1);
+ s->reorder_pb[5]= s->m.pb;
+ score[1] += lambda*put_bits_count(&s->reorder_pb[5]);
+
+ dxy= (mx&1) + 2*(my&1);
+
+ s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);
+
+ score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);
+ best= score[1] <= score[0];
+
+ vlc= ff_svq1_block_type_vlc[SVQ1_BLOCK_SKIP];
+ score[2]= s->dsp.sse[0](NULL, src+16*x, ref, stride, 16);
+ score[2]+= vlc[1]*lambda;
+ if(score[2] < score[best] && mx==0 && my==0){
+ best=2;
+ s->dsp.put_pixels_tab[0][0](decoded, ref, stride, 16);
+ for(i=0; i<6; i++){
+ count[2][i]=0;
+ }
+ put_bits(&s->pb, vlc[1], vlc[0]);
+ }
+ }
+
+ if(best==1){
+ for(i=0; i<6; i++){
+ count[1][i]= put_bits_count(&s->reorder_pb[i]);
+ flush_put_bits(&s->reorder_pb[i]);
+ }
+ }else{
+ motion_ptr[0 ] = motion_ptr[1 ]=
+ motion_ptr[2 ] = motion_ptr[3 ]=
+ motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=
+ motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;
+ }
+ }
+
+ s->rd_total += score[best];
+
+ for(i=5; i>=0; i--){
+ ff_copy_bits(&s->pb, reorder_buffer[best][i], count[best][i]);
+ }
+ if(best==0){
+ s->dsp.put_pixels_tab[0][0](decoded, temp, stride, 16);
+ }
+ }
+ s->m.first_slice_line=0;
+ }
+ return 0;
+}
+
+static int svq1_encode_init(AVCodecContext *avctx)
+{
+ SVQ1Context * const s = avctx->priv_data;
+
+ dsputil_init(&s->dsp, avctx);
+ avctx->coded_frame= (AVFrame*)&s->picture;
+
+ s->frame_width = avctx->width;
+ s->frame_height = avctx->height;
+
+ s->y_block_width = (s->frame_width + 15) / 16;
+ s->y_block_height = (s->frame_height + 15) / 16;
+
+ s->c_block_width = (s->frame_width / 4 + 15) / 16;
+ s->c_block_height = (s->frame_height / 4 + 15) / 16;
+
+ s->avctx= avctx;
+ s->m.avctx= avctx;
+ 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->mb_type = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));
+ s->dummy = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));
+ h263_encode_init(&s->m); //mv_penalty
+
+ return 0;
+}
+
+static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
+ int buf_size, void *data)
+{
+ SVQ1Context * const s = avctx->priv_data;
+ AVFrame *pict = data;
+ AVFrame * const p= (AVFrame*)&s->picture;
+ AVFrame temp;
+ int i;
+
+ if(avctx->pix_fmt != PIX_FMT_YUV410P){
+ av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
+ return -1;
+ }
+
+ if(!s->current_picture.data[0]){
+ avctx->get_buffer(avctx, &s->current_picture);
+ avctx->get_buffer(avctx, &s->last_picture);
+ }
+
+ temp= s->current_picture;
+ s->current_picture= s->last_picture;
+ s->last_picture= temp;
+
+ init_put_bits(&s->pb, buf, buf_size);
+
+ *p = *pict;
+ p->pict_type = avctx->gop_size && avctx->frame_number % avctx->gop_size ? P_TYPE : I_TYPE;
+ p->key_frame = p->pict_type == I_TYPE;
+
+ svq1_write_header(s, p->pict_type);
+ for(i=0; i<3; i++){
+ if(svq1_encode_plane(s, i,
+ s->picture.data[i], s->last_picture.data[i], s->current_picture.data[i],
+ s->frame_width / (i?4:1), s->frame_height / (i?4:1),
+ s->picture.linesize[i], s->current_picture.linesize[i]) < 0)
+ return -1;
+ }
+
+// align_put_bits(&s->pb);
+ while(put_bits_count(&s->pb) & 31)
+ put_bits(&s->pb, 1, 0);
+
+ flush_put_bits(&s->pb);
+
+ return (put_bits_count(&s->pb) / 8);
+}
+
+static int svq1_encode_end(AVCodecContext *avctx)
+{
+ SVQ1Context * const s = avctx->priv_data;
+ int i;
+
+ av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));
+
+ av_freep(&s->m.me.scratchpad);
+ av_freep(&s->m.me.map);
+ av_freep(&s->m.me.score_map);
+ av_freep(&s->mb_type);
+ av_freep(&s->dummy);
+
+ for(i=0; i<3; i++){
+ av_freep(&s->motion_val8[i]);
+ av_freep(&s->motion_val16[i]);
+ }
+
+ return 0;
+}
+
+
+AVCodec svq1_encoder = {
+ "svq1",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_SVQ1,
+ sizeof(SVQ1Context),
+ svq1_encode_init,
+ svq1_encode_frame,
+ svq1_encode_end,
+ .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV410P, -1},
+};