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authorDaniel Huang <dtvrij74@gmail.com>2012-01-08 13:14:37 -0600
committerDiego Biurrun <diego@biurrun.de>2012-01-08 23:33:00 +0100
commit8549cf073b6e292bb2812537d08d7e34e1f0a06a (patch)
tree31f0856b6adc20b0f6cb7991cfee76e7038ec952 /libavcodec/mjpegdec.c
parent999484c9fbc38f81df300ed356cf0f6ce26c949d (diff)
downloadffmpeg-8549cf073b6e292bb2812537d08d7e34e1f0a06a.tar.gz
mjpegdec: K&R formatting cosmetics
Signed-off-by: Diego Biurrun <diego@biurrun.de>
Diffstat (limited to 'libavcodec/mjpegdec.c')
-rw-r--r--libavcodec/mjpegdec.c1409
1 files changed, 726 insertions, 683 deletions
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index 7a85c16d95..2ae502ddeb 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -30,7 +30,7 @@
* MJPEG decoder.
*/
-//#define DEBUG
+// #define DEBUG
#include <assert.h>
#include "libavutil/imgutils.h"
@@ -42,8 +42,9 @@
#include "jpeglsdec.h"
-static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
- int nb_codes, int use_static, int is_ac)
+static int build_vlc(VLC *vlc, const uint8_t *bits_table,
+ const uint8_t *val_table, int nb_codes,
+ int use_static, int is_ac)
{
uint8_t huff_size[256];
uint16_t huff_code[256];
@@ -55,15 +56,18 @@ static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_tab
memset(huff_size, 0, sizeof(huff_size));
ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
- for(i=0; i<256; i++)
- huff_sym[i]= i + 16*is_ac;
+ for (i = 0; i < 256; i++)
+ huff_sym[i] = i + 16 * is_ac;
- if(is_ac) huff_sym[0]= 16*256;
+ if (is_ac)
+ huff_sym[0] = 16 * 256;
- return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, huff_sym, 2, 2, use_static);
+ return init_vlc_sparse(vlc, 9, nb_codes, huff_size, 1, 1,
+ huff_code, 2, 2, huff_sym, 2, 2, use_static);
}
-static void build_basic_mjpeg_vlc(MJpegDecodeContext * s) {
+static void build_basic_mjpeg_vlc(MJpegDecodeContext *s)
+{
build_vlc(&s->vlcs[0][0], ff_mjpeg_bits_dc_luminance,
ff_mjpeg_val_dc, 12, 0, 0);
build_vlc(&s->vlcs[0][1], ff_mjpeg_bits_dc_chrominance,
@@ -88,11 +92,11 @@ av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
s->avctx = avctx;
dsputil_init(&s->dsp, avctx);
ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
- s->buffer_size = 0;
- s->buffer = NULL;
- s->start_code = -1;
+ s->buffer_size = 0;
+ s->buffer = NULL;
+ s->start_code = -1;
s->first_picture = 1;
- s->org_height = avctx->coded_height;
+ s->org_height = avctx->coded_height;
avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
build_basic_mjpeg_vlc(s);
@@ -101,17 +105,17 @@ av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
s->extern_huff = 1;
#endif
- if (s->extern_huff)
- {
+ if (s->extern_huff) {
av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
- init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
+ init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
if (ff_mjpeg_decode_dht(s)) {
- av_log(avctx, AV_LOG_ERROR, "mjpeg: error using external huffman table\n");
+ av_log(avctx, AV_LOG_ERROR,
+ "mjpeg: error using external huffman table\n");
return AVERROR_INVALIDDATA;
}
}
if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
- s->interlace_polarity = 1; /* bottom field first */
+ s->interlace_polarity = 1; /* bottom field first */
av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
}
if (avctx->codec->id == CODEC_ID_AMV)
@@ -130,8 +134,7 @@ int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
while (len >= 65) {
/* only 8 bit precision handled */
- if (get_bits(&s->gb, 4) != 0)
- {
+ if (get_bits(&s->gb, 4) != 0) {
av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
return -1;
}
@@ -140,19 +143,18 @@ int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
return -1;
av_log(s->avctx, AV_LOG_DEBUG, "index=%d\n", index);
/* read quant table */
- for(i=0;i<64;i++) {
+ for (i = 0; i < 64; i++) {
j = s->scantable.permutated[i];
s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
}
- //XXX FIXME finetune, and perhaps add dc too
- s->qscale[index]= FFMAX(
- s->quant_matrixes[index][s->scantable.permutated[1]],
- s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
- av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n", index, s->qscale[index]);
+ // XXX FIXME finetune, and perhaps add dc too
+ s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
+ s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
+ av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
+ index, s->qscale[index]);
len -= 65;
}
-
return 0;
}
@@ -175,7 +177,7 @@ int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
if (index >= 4)
return -1;
n = 0;
- for(i=1;i<=16;i++) {
+ for (i = 1; i <= 16; i++) {
bits_table[i] = get_bits(&s->gb, 8);
n += bits_table[i];
}
@@ -184,7 +186,7 @@ int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
return -1;
code_max = 0;
- for(i=0;i<n;i++) {
+ for (i = 0; i < n; i++) {
v = get_bits(&s->gb, 8);
if (v > code_max)
code_max = v;
@@ -196,15 +198,15 @@ int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
free_vlc(&s->vlcs[class][index]);
av_log(s->avctx, AV_LOG_DEBUG, "class=%d index=%d nb_codes=%d\n",
class, index, code_max + 1);
- if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
+ if (build_vlc(&s->vlcs[class][index], bits_table, val_table,
+ code_max + 1, 0, class > 0) < 0)
return -1;
- }
- if(class>0){
+ if (class > 0) {
free_vlc(&s->vlcs[2][index]);
- if(build_vlc(&s->vlcs[2][index], bits_table, val_table, code_max + 1, 0, 0) < 0){
- return -1;
- }
+ if (build_vlc(&s->vlcs[2][index], bits_table, val_table,
+ code_max + 1, 0, 0) < 0)
+ return -1;
}
}
return 0;
@@ -215,44 +217,47 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
int len, nb_components, i, width, height, pix_fmt_id;
/* XXX: verify len field validity */
- len = get_bits(&s->gb, 16);
- s->bits= get_bits(&s->gb, 8);
+ len = get_bits(&s->gb, 16);
+ s->bits = get_bits(&s->gb, 8);
- if(s->pegasus_rct) s->bits=9;
- if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
+ if (s->pegasus_rct)
+ s->bits = 9;
+ if (s->bits == 9 && !s->pegasus_rct)
+ s->rct = 1; // FIXME ugly
- if (s->bits != 8 && !s->lossless){
+ if (s->bits != 8 && !s->lossless) {
av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
return -1;
}
height = get_bits(&s->gb, 16);
- width = get_bits(&s->gb, 16);
+ width = get_bits(&s->gb, 16);
- //HACK for odd_height.mov
- if(s->interlaced && s->width == width && s->height == height + 1)
+ // HACK for odd_height.mov
+ if (s->interlaced && s->width == width && s->height == height + 1)
height= s->height;
av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height);
- if(av_image_check_size(width, height, 0, s->avctx))
+ if (av_image_check_size(width, height, 0, s->avctx))
return -1;
nb_components = get_bits(&s->gb, 8);
if (nb_components <= 0 ||
nb_components > MAX_COMPONENTS)
return -1;
- if (s->ls && !(s->bits <= 8 || nb_components == 1)){
- av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
+ if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n");
return -1;
}
s->nb_components = nb_components;
- s->h_max = 1;
- s->v_max = 1;
- for(i=0;i<nb_components;i++) {
+ s->h_max = 1;
+ s->v_max = 1;
+ for (i = 0; i < nb_components; i++) {
/* component id */
s->component_id[i] = get_bits(&s->gb, 8) - 1;
- s->h_count[i] = get_bits(&s->gb, 4);
- s->v_count[i] = get_bits(&s->gb, 4);
+ s->h_count[i] = get_bits(&s->gb, 4);
+ s->v_count[i] = get_bits(&s->gb, 4);
/* compute hmax and vmax (only used in interleaved case) */
if (s->h_count[i] > s->h_max)
s->h_max = s->h_count[i];
@@ -261,45 +266,47 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
s->quant_index[i] = get_bits(&s->gb, 8);
if (s->quant_index[i] >= 4)
return -1;
- av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
- s->v_count[i], s->component_id[i], s->quant_index[i]);
+ av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
+ i, s->h_count[i], s->v_count[i],
+ s->component_id[i], s->quant_index[i]);
}
- if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
- av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
+ if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Subsampling in JPEG-LS is not supported.\n");
return -1;
}
- if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
+ if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
+ s->rgb = 1;
/* if different size, realloc/alloc picture */
/* XXX: also check h_count and v_count */
if (width != s->width || height != s->height) {
av_freep(&s->qscale_table);
- s->width = width;
- s->height = height;
+ s->width = width;
+ s->height = height;
s->interlaced = 0;
/* test interlaced mode */
- if (s->first_picture &&
+ if (s->first_picture &&
s->org_height != 0 &&
s->height < ((s->org_height * 3) / 4)) {
- s->interlaced = 1;
- s->bottom_field = s->interlace_polarity;
+ s->interlaced = 1;
+ s->bottom_field = s->interlace_polarity;
s->picture_ptr->interlaced_frame = 1;
- s->picture_ptr->top_field_first = !s->interlace_polarity;
+ s->picture_ptr->top_field_first = !s->interlace_polarity;
height *= 2;
}
avcodec_set_dimensions(s->avctx, width, height);
- s->qscale_table= av_mallocz((s->width+15)/16);
-
+ s->qscale_table = av_mallocz((s->width + 15) / 16);
s->first_picture = 0;
}
- if(s->interlaced && (s->bottom_field == !s->interlace_polarity))
+ if (s->interlaced && (s->bottom_field == !s->interlace_polarity))
return 0;
/* XXX: not complete test ! */
@@ -308,19 +315,20 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
(s->h_count[2] << 12) | (s->v_count[2] << 8) |
(s->h_count[3] << 4) | s->v_count[3];
av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id);
- //NOTE we do not allocate pictures large enough for the possible padding of h/v_count being 4
- if(!(pix_fmt_id & 0xD0D0D0D0))
- pix_fmt_id-= (pix_fmt_id & 0xF0F0F0F0)>>1;
- if(!(pix_fmt_id & 0x0D0D0D0D))
- pix_fmt_id-= (pix_fmt_id & 0x0F0F0F0F)>>1;
-
- switch(pix_fmt_id){
+ /* NOTE we do not allocate pictures large enough for the possible
+ * padding of h/v_count being 4 */
+ if (!(pix_fmt_id & 0xD0D0D0D0))
+ pix_fmt_id -= (pix_fmt_id & 0xF0F0F0F0) >> 1;
+ if (!(pix_fmt_id & 0x0D0D0D0D))
+ pix_fmt_id -= (pix_fmt_id & 0x0F0F0F0F) >> 1;
+
+ switch (pix_fmt_id) {
case 0x11111100:
- if(s->rgb){
+ if (s->rgb)
s->avctx->pix_fmt = PIX_FMT_BGRA;
- }else
+ else
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
- assert(s->nb_components==3);
+ assert(s->nb_components == 3);
break;
case 0x11000000:
s->avctx->pix_fmt = PIX_FMT_GRAY8;
@@ -338,47 +346,46 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
return -1;
}
- if(s->ls){
- if(s->nb_components > 1)
+ if (s->ls) {
+ if (s->nb_components > 1)
s->avctx->pix_fmt = PIX_FMT_RGB24;
- else if(s->bits <= 8)
+ else if (s->bits <= 8)
s->avctx->pix_fmt = PIX_FMT_GRAY8;
else
s->avctx->pix_fmt = PIX_FMT_GRAY16;
}
- if(s->picture_ptr->data[0])
+ if (s->picture_ptr->data[0])
s->avctx->release_buffer(s->avctx, s->picture_ptr);
- if(s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0){
+ if (s->avctx->get_buffer(s->avctx, s->picture_ptr) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
- s->picture_ptr->pict_type= AV_PICTURE_TYPE_I;
- s->picture_ptr->key_frame= 1;
- s->got_picture = 1;
+ s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
+ s->picture_ptr->key_frame = 1;
+ s->got_picture = 1;
- for(i=0; i<3; i++){
- s->linesize[i]= s->picture_ptr->linesize[i] << s->interlaced;
- }
+ for (i = 0; i < 3; i++)
+ s->linesize[i] = s->picture_ptr->linesize[i] << s->interlaced;
-// printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
+// printf("%d %d %d %d %d %d\n",
+// s->width, s->height, s->linesize[0], s->linesize[1],
+// s->interlaced, s->avctx->height);
- if (len != (8+(3*nb_components)))
- {
+ if (len != (8 + (3 * nb_components)))
av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
- }
/* totally blank picture as progressive JPEG will only add details to it */
- if(s->progressive){
- int bw = (width + s->h_max*8-1) / (s->h_max*8);
- int bh = (height + s->v_max*8-1) / (s->v_max*8);
- for(i=0; i<s->nb_components; i++) {
+ if (s->progressive) {
+ int bw = (width + s->h_max * 8 - 1) / (s->h_max * 8);
+ int bh = (height + s->v_max * 8 - 1) / (s->v_max * 8);
+ for (i = 0; i < s->nb_components; i++) {
int size = bw * bh * s->h_count[i] * s->v_count[i];
av_freep(&s->blocks[i]);
av_freep(&s->last_nnz[i]);
- s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
- s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
+ s->blocks[i] = av_malloc(size * sizeof(**s->blocks));
+ s->last_nnz[i] = av_mallocz(size * sizeof(**s->last_nnz));
s->block_stride[i] = bw * s->h_count[i];
}
memset(s->coefs_finished, 0, sizeof(s->coefs_finished));
@@ -390,22 +397,22 @@ static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
{
int code;
code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
- if (code < 0)
- {
- av_log(s->avctx, AV_LOG_WARNING, "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
- &s->vlcs[0][dc_index]);
+ if (code < 0) {
+ av_log(s->avctx, AV_LOG_WARNING,
+ "mjpeg_decode_dc: bad vlc: %d:%d (%p)\n",
+ 0, dc_index, &s->vlcs[0][dc_index]);
return 0xffff;
}
- if(code)
+ if (code)
return get_xbits(&s->gb, code);
else
return 0;
}
/* decode block and dequantize */
-static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
- int component, int dc_index, int ac_index, int16_t *quant_matrix)
+static int decode_block(MJpegDecodeContext *s, DCTELEM *block, int component,
+ int dc_index, int ac_index, int16_t *quant_matrix)
{
int code, i, j, level, val;
@@ -427,14 +434,14 @@ static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
i += ((unsigned)code) >> 4;
code &= 0xf;
- if(code){
- if(code > MIN_CACHE_BITS - 16){
+ if (code) {
+ if (code > MIN_CACHE_BITS - 16)
UPDATE_CACHE(re, &s->gb);
- }
+
{
- int cache=GET_CACHE(re,&s->gb);
- int sign=(~cache)>>31;
- level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
+ int cache = GET_CACHE(re, &s->gb);
+ int sign = (~cache) >> 31;
+ level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
}
LAST_SKIP_BITS(re, &s->gb, code);
@@ -443,17 +450,18 @@ static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
return -1;
}
- j = s->scantable.permutated[i];
+ j = s->scantable.permutated[i];
block[j] = level * quant_matrix[j];
}
- }while(i<63);
+ } while (i < 63);
CLOSE_READER(re, &s->gb);}
return 0;
}
-static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int component,
- int dc_index, int16_t *quant_matrix, int Al)
+static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block,
+ int component, int dc_index,
+ int16_t *quant_matrix, int Al)
{
int val;
s->dsp.clear_block(block);
@@ -469,113 +477,121 @@ static int decode_dc_progressive(MJpegDecodeContext *s, DCTELEM *block, int comp
}
/* decode block and dequantize - progressive JPEG version */
-static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
- int ac_index, int16_t *quant_matrix,
+static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block,
+ uint8_t *last_nnz, int ac_index,
+ int16_t *quant_matrix,
int ss, int se, int Al, int *EOBRUN)
{
int code, i, j, level, val, run;
- if(*EOBRUN){
+ if (*EOBRUN) {
(*EOBRUN)--;
return 0;
}
- {OPEN_READER(re, &s->gb);
- for(i=ss;;i++) {
- UPDATE_CACHE(re, &s->gb);
- GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
- run = ((unsigned) code) >> 4;
- code &= 0xF;
- if(code) {
- i += run;
- if(code > MIN_CACHE_BITS - 16){
- UPDATE_CACHE(re, &s->gb);
- }
- {
- int cache=GET_CACHE(re,&s->gb);
- int sign=(~cache)>>31;
- level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
- }
+ {
+ OPEN_READER(re, &s->gb);
+ for (i = ss; ; i++) {
+ UPDATE_CACHE(re, &s->gb);
+ GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
- LAST_SKIP_BITS(re, &s->gb, code);
+ run = ((unsigned) code) >> 4;
+ code &= 0xF;
+ if (code) {
+ i += run;
+ if (code > MIN_CACHE_BITS - 16)
+ UPDATE_CACHE(re, &s->gb);
- if (i >= se) {
- if(i == se){
- j = s->scantable.permutated[se];
- block[j] = level * quant_matrix[j] << Al;
- break;
+ {
+ int cache = GET_CACHE(re, &s->gb);
+ int sign = (~cache) >> 31;
+ level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
}
- av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
- return -1;
- }
- j = s->scantable.permutated[i];
- block[j] = level * quant_matrix[j] << Al;
- }else{
- if(run == 0xF){// ZRL - skip 15 coefficients
- i += 15;
+
+ LAST_SKIP_BITS(re, &s->gb, code);
+
if (i >= se) {
- av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
+ if (i == se) {
+ j = s->scantable.permutated[se];
+ block[j] = level * quant_matrix[j] << Al;
+ break;
+ }
+ av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);
return -1;
}
- }else{
- val = (1 << run);
- if(run){
- UPDATE_CACHE(re, &s->gb);
- val += NEG_USR32(GET_CACHE(re, &s->gb), run);
- LAST_SKIP_BITS(re, &s->gb, run);
+ j = s->scantable.permutated[i];
+ block[j] = level * quant_matrix[j] << Al;
+ } else {
+ if (run == 0xF) {// ZRL - skip 15 coefficients
+ i += 15;
+ if (i >= se) {
+ av_log(s->avctx, AV_LOG_ERROR, "ZRL overflow: %d\n", i);
+ return -1;
+ }
+ } else {
+ val = (1 << run);
+ if (run) {
+ UPDATE_CACHE(re, &s->gb);
+ val += NEG_USR32(GET_CACHE(re, &s->gb), run);
+ LAST_SKIP_BITS(re, &s->gb, run);
+ }
+ *EOBRUN = val - 1;
+ break;
}
- *EOBRUN = val - 1;
- break;
}
}
+ CLOSE_READER(re, &s->gb);
}
- CLOSE_READER(re, &s->gb);}
- if(i > *last_nnz)
+
+ if (i > *last_nnz)
*last_nnz = i;
+
return 0;
}
-#define REFINE_BIT(j) {\
- UPDATE_CACHE(re, &s->gb);\
- sign = block[j]>>15;\
- block[j] += SHOW_UBITS(re, &s->gb, 1) * ((quant_matrix[j]^sign)-sign) << Al;\
- LAST_SKIP_BITS(re, &s->gb, 1);\
+#define REFINE_BIT(j) { \
+ UPDATE_CACHE(re, &s->gb); \
+ sign = block[j] >> 15; \
+ block[j] += SHOW_UBITS(re, &s->gb, 1) * \
+ ((quant_matrix[j] ^ sign) - sign) << Al; \
+ LAST_SKIP_BITS(re, &s->gb, 1); \
}
-#define ZERO_RUN \
-for(;;i++) {\
- if(i > last) {\
- i += run;\
- if(i > se) {\
- av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i);\
- return -1;\
- }\
- break;\
- }\
- j = s->scantable.permutated[i];\
- if(block[j])\
- REFINE_BIT(j)\
- else if(run-- == 0)\
- break;\
+#define ZERO_RUN \
+for (; ; i++) { \
+ if (i > last) { \
+ i += run; \
+ if (i > se) { \
+ av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); \
+ return -1; \
+ } \
+ break; \
+ } \
+ j = s->scantable.permutated[i]; \
+ if (block[j]) \
+ REFINE_BIT(j) \
+ else if (run-- == 0) \
+ break; \
}
/* decode block and dequantize - progressive JPEG refinement pass */
-static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_t *last_nnz,
- int ac_index, int16_t *quant_matrix,
- int ss, int se, int Al, int *EOBRUN)
+static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block,
+ uint8_t *last_nnz,
+ int ac_index, int16_t *quant_matrix,
+ int ss, int se, int Al, int *EOBRUN)
{
- int code, i=ss, j, sign, val, run;
- int last = FFMIN(se, *last_nnz);
+ int code, i = ss, j, sign, val, run;
+ int last = FFMIN(se, *last_nnz);
OPEN_READER(re, &s->gb);
- if(*EOBRUN)
+ if (*EOBRUN) {
(*EOBRUN)--;
- else {
- for(;;i++) {
+ } else {
+ for (; ; i++) {
UPDATE_CACHE(re, &s->gb);
GET_VLC(code, re, &s->gb, s->vlcs[2][ac_index].table, 9, 2);
- if(code & 0xF) {
+ if (code & 0xF) {
run = ((unsigned) code) >> 4;
UPDATE_CACHE(re, &s->gb);
val = SHOW_UBITS(re, &s->gb, 1);
@@ -583,21 +599,21 @@ static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_
ZERO_RUN;
j = s->scantable.permutated[i];
val--;
- block[j] = ((quant_matrix[j]^val)-val) << Al;
- if(i == se) {
- if(i > *last_nnz)
+ block[j] = ((quant_matrix[j]^val) - val) << Al;
+ if (i == se) {
+ if (i > *last_nnz)
*last_nnz = i;
CLOSE_READER(re, &s->gb);
return 0;
}
- }else{
+ } else {
run = ((unsigned) code) >> 4;
- if(run == 0xF){
+ if (run == 0xF) {
ZERO_RUN;
- }else{
+ } else {
val = run;
run = (1 << run);
- if(val) {
+ if (val) {
UPDATE_CACHE(re, &s->gb);
run += SHOW_UBITS(re, &s->gb, val);
LAST_SKIP_BITS(re, &s->gb, val);
@@ -608,13 +624,13 @@ static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_
}
}
- if(i > *last_nnz)
+ if (i > *last_nnz)
*last_nnz = i;
}
- for(;i<=last;i++) {
+ for (; i <= last; i++) {
j = s->scantable.permutated[i];
- if(block[j])
+ if (block[j])
REFINE_BIT(j)
}
CLOSE_READER(re, &s->gb);
@@ -624,43 +640,46 @@ static int decode_block_refinement(MJpegDecodeContext *s, DCTELEM *block, uint8_
#undef REFINE_BIT
#undef ZERO_RUN
-static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
+static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
+ int point_transform)
+{
int i, mb_x, mb_y;
uint16_t (*buffer)[4];
int left[3], top[3], topleft[3];
- const int linesize= s->linesize[0];
- const int mask= (1<<s->bits)-1;
+ const int linesize = s->linesize[0];
+ const int mask = (1 << s->bits) - 1;
- av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size, (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
- buffer= s->ljpeg_buffer;
+ av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
+ (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
+ buffer = s->ljpeg_buffer;
- for(i=0; i<3; i++){
- buffer[0][i]= 1 << (s->bits + point_transform - 1);
- }
- for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
- const int modified_predictor= mb_y ? predictor : 1;
+ for (i = 0; i < 3; i++)
+ buffer[0][i] = 1 << (s->bits + point_transform - 1);
+
+ for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
+ const int modified_predictor = mb_y ? predictor : 1;
uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
if (s->interlaced && s->bottom_field)
ptr += linesize >> 1;
- for(i=0; i<3; i++){
- top[i]= left[i]= topleft[i]= buffer[0][i];
- }
- for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
+ for (i = 0; i < 3; i++)
+ top[i] = left[i] = topleft[i] = buffer[0][i];
+
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
if (s->restart_interval && !s->restart_count)
s->restart_count = s->restart_interval;
- for(i=0;i<3;i++) {
+ for (i = 0; i < 3; i++) {
int pred;
- topleft[i]= top[i];
- top[i]= buffer[mb_x][i];
+ topleft[i] = top[i];
+ top[i] = buffer[mb_x][i];
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
- left[i]=
- buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
+ left[i] = buffer[mb_x][i] =
+ mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
}
if (s->restart_interval && !--s->restart_count) {
@@ -669,71 +688,74 @@ static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point
}
}
- if(s->rct){
- for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
- ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
- ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
- ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
+ if (s->rct) {
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
+ ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
+ ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
+ ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
}
- }else if(s->pegasus_rct){
- for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
- ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
- ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
- ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
+ } else if (s->pegasus_rct) {
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
+ ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
+ ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
+ ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
}
- }else{
- for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
- ptr[4*mb_x+0] = buffer[mb_x][2];
- ptr[4*mb_x+1] = buffer[mb_x][1];
- ptr[4*mb_x+2] = buffer[mb_x][0];
+ } else {
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
+ ptr[4 * mb_x + 0] = buffer[mb_x][2];
+ ptr[4 * mb_x + 1] = buffer[mb_x][1];
+ ptr[4 * mb_x + 2] = buffer[mb_x][0];
}
}
}
return 0;
}
-static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
+static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
+ int point_transform)
+{
int i, mb_x, mb_y;
- const int nb_components=3;
+ const int nb_components = 3;
- for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
- for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
+ for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
if (s->restart_interval && !s->restart_count)
s->restart_count = s->restart_interval;
- if(mb_x==0 || mb_y==0 || s->interlaced){
- for(i=0;i<nb_components;i++) {
+ if (mb_x == 0 || mb_y == 0 || s->interlaced) {
+ for (i = 0; i < nb_components; i++) {
uint8_t *ptr;
int n, h, v, x, y, c, j, linesize;
- n = s->nb_blocks[i];
- c = s->comp_index[i];
- h = s->h_scount[i];
- v = s->v_scount[i];
- x = 0;
- y = 0;
- linesize= s->linesize[c];
-
- for(j=0; j<n; j++) {
+ n = s->nb_blocks[i];
+ c = s->comp_index[i];
+ h = s->h_scount[i];
+ v = s->v_scount[i];
+ x = 0;
+ y = 0;
+ linesize = s->linesize[c];
+
+ for (j = 0; j < n; j++) {
int pred;
-
- ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
- if(y==0 && mb_y==0){
- if(x==0 && mb_x==0){
- pred= 128 << point_transform;
- }else{
- pred= ptr[-1];
- }
- }else{
- if(x==0 && mb_x==0){
- pred= ptr[-linesize];
- }else{
- PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
- }
- }
+ // FIXME optimize this crap
+ ptr = s->picture_ptr->data[c] +
+ (linesize * (v * mb_y + y)) +
+ (h * mb_x + x);
+ if (y == 0 && mb_y == 0) {
+ if (x == 0 && mb_x == 0)
+ pred = 128 << point_transform;
+ else
+ pred = ptr[-1];
+ } else {
+ if (x == 0 && mb_x == 0)
+ pred = ptr[-linesize];
+ else
+ PREDICT(pred, ptr[-linesize - 1],
+ ptr[-linesize], ptr[-1], predictor);
+ }
if (s->interlaced && s->bottom_field)
ptr += linesize >> 1;
- *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
+ *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
if (++x == h) {
x = 0;
@@ -741,24 +763,28 @@ static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point
}
}
}
- }else{
- for(i=0;i<nb_components;i++) {
+ } else {
+ for (i = 0; i < nb_components; i++) {
uint8_t *ptr;
int n, h, v, x, y, c, j, linesize;
- n = s->nb_blocks[i];
- c = s->comp_index[i];
- h = s->h_scount[i];
- v = s->v_scount[i];
- x = 0;
- y = 0;
- linesize= s->linesize[c];
-
- for(j=0; j<n; j++) {
+ n = s->nb_blocks[i];
+ c = s->comp_index[i];
+ h = s->h_scount[i];
+ v = s->v_scount[i];
+ x = 0;
+ y = 0;
+ linesize = s->linesize[c];
+
+ for (j = 0; j < n; j++) {
int pred;
- ptr = s->picture_ptr->data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
- PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
- *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
+ // FIXME optimize this crap
+ ptr = s->picture_ptr->data[c] +
+ (linesize * (v * mb_y + y)) +
+ (h * mb_x + x);
+ PREDICT(pred, ptr[-linesize - 1],
+ ptr[-linesize], ptr[-1], predictor);
+ *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
if (++x == h) {
x = 0;
y++;
@@ -790,49 +816,54 @@ static av_always_inline void mjpeg_copy_block(uint8_t *dst, const uint8_t *src,
}
}
-static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, int Al,
- const uint8_t *mb_bitmask, const AVFrame *reference){
+static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
+ int Al, const uint8_t *mb_bitmask,
+ const AVFrame *reference)
+{
int i, mb_x, mb_y;
- uint8_t* data[MAX_COMPONENTS];
+ uint8_t *data[MAX_COMPONENTS];
const uint8_t *reference_data[MAX_COMPONENTS];
int linesize[MAX_COMPONENTS];
GetBitContext mb_bitmask_gb;
- if (mb_bitmask) {
- init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width*s->mb_height);
- }
+ if (mb_bitmask)
+ init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
- if(s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
- av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
+ if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
s->flipped = 0;
}
- for(i=0; i < nb_components; i++) {
- int c = s->comp_index[i];
+
+ for (i = 0; i < nb_components; i++) {
+ int c = s->comp_index[i];
data[c] = s->picture_ptr->data[c];
reference_data[c] = reference ? reference->data[c] : NULL;
- linesize[c]=s->linesize[c];
+ linesize[c] = s->linesize[c];
s->coefs_finished[c] |= 1;
- if(s->flipped) {
- //picture should be flipped upside-down for this codec
- int offset = (linesize[c] * (s->v_scount[i] * (8 * s->mb_height -((s->height/s->v_max)&7)) - 1 ));
- data[c] += offset;
+ if (s->flipped) {
+ // picture should be flipped upside-down for this codec
+ int offset = (linesize[c] * (s->v_scount[i] *
+ (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
+ data[c] += offset;
reference_data[c] += offset;
- linesize[c] *= -1;
+ linesize[c] *= -1;
}
}
- for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
- for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
+ for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
if (s->restart_interval && !s->restart_count)
s->restart_count = s->restart_interval;
- if(get_bits_count(&s->gb)>s->gb.size_in_bits){
- av_log(s->avctx, AV_LOG_ERROR, "overread %d\n", get_bits_count(&s->gb) - s->gb.size_in_bits);
+ if (get_bits_count(&s->gb)>s->gb.size_in_bits) {
+ av_log(s->avctx, AV_LOG_ERROR, "overread %d\n",
+ get_bits_count(&s->gb) - s->gb.size_in_bits);
return -1;
}
- for(i=0;i<nb_components;i++) {
+ for (i = 0; i < nb_components; i++) {
uint8_t *ptr;
int n, h, v, x, y, c, j;
int block_offset;
@@ -842,38 +873,48 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, i
v = s->v_scount[i];
x = 0;
y = 0;
- for(j=0;j<n;j++) {
+ for (j = 0; j < n; j++) {
block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
(h * mb_x + x) * 8) >> s->avctx->lowres);
- if(s->interlaced && s->bottom_field)
+ if (s->interlaced && s->bottom_field)
block_offset += linesize[c] >> 1;
ptr = data[c] + block_offset;
- if(!s->progressive) {
- if (copy_mb) {
- mjpeg_copy_block(ptr, reference_data[c] + block_offset, linesize[c], s->avctx->lowres);
- } else {
- s->dsp.clear_block(s->block);
- if(decode_block(s, s->block, i,
- s->dc_index[i], s->ac_index[i],
- s->quant_matrixes[ s->quant_index[c] ]) < 0) {
- av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
- return -1;
- }
- s->dsp.idct_put(ptr, linesize[c], s->block);
+ if (!s->progressive) {
+ if (copy_mb)
+ mjpeg_copy_block(ptr, reference_data[c] + block_offset,
+ linesize[c], s->avctx->lowres);
+ else {
+ s->dsp.clear_block(s->block);
+ if (decode_block(s, s->block, i,
+ s->dc_index[i], s->ac_index[i],
+ s->quant_matrixes[s->quant_index[c]]) < 0) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "error y=%d x=%d\n", mb_y, mb_x);
+ return -1;
+ }
+ s->dsp.idct_put(ptr, linesize[c], s->block);
}
} else {
- int block_idx = s->block_stride[c] * (v * mb_y + y) + (h * mb_x + x);
+ int block_idx = s->block_stride[c] * (v * mb_y + y) +
+ (h * mb_x + x);
DCTELEM *block = s->blocks[c][block_idx];
- if(Ah)
- block[0] += get_bits1(&s->gb) * s->quant_matrixes[ s->quant_index[c] ][0] << Al;
- else if(decode_dc_progressive(s, block, i, s->dc_index[i], s->quant_matrixes[ s->quant_index[c] ], Al) < 0) {
- av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
+ if (Ah)
+ block[0] += get_bits1(&s->gb) *
+ s->quant_matrixes[s->quant_index[c]][0] << Al;
+ else if (decode_dc_progressive(s, block, i, s->dc_index[i],
+ s->quant_matrixes[s->quant_index[c]],
+ Al) < 0) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "error y=%d x=%d\n", mb_y, mb_x);
return -1;
}
}
-// av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n", mb_y, mb_x);
-//av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n", mb_x, mb_y, x, y, c, s->bottom_field, (v * mb_y + y) * 8, (h * mb_x + x) * 8);
+ // av_log(s->avctx, AV_LOG_DEBUG, "mb: %d %d processed\n",
+ // mb_y, mb_x);
+ // av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n",
+ // mb_x, mb_y, x, y, c, s->bottom_field,
+ // (v * mb_y + y) * 8, (h * mb_x + x) * 8);
if (++x == h) {
x = 0;
y++;
@@ -893,9 +934,8 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, i
if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
for (i = 0; i < nb_components; i++) /* reset dc */
s->last_dc[i] = 1024;
- } else {
+ } else
skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
- }
}
}
}
@@ -903,62 +943,66 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah, i
return 0;
}
-static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int se, int Ah, int Al,
- const uint8_t *mb_bitmask, const AVFrame *reference){
+static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
+ int se, int Ah, int Al,
+ const uint8_t *mb_bitmask,
+ const AVFrame *reference)
+{
int mb_x, mb_y;
int EOBRUN = 0;
int c = s->comp_index[0];
- uint8_t* data = s->picture_ptr->data[c];
+ uint8_t *data = s->picture_ptr->data[c];
const uint8_t *reference_data = reference ? reference->data[c] : NULL;
- int linesize = s->linesize[c];
+ int linesize = s->linesize[c];
int last_scan = 0;
- int16_t *quant_matrix = s->quant_matrixes[ s->quant_index[c] ];
+ int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
GetBitContext mb_bitmask_gb;
- if (mb_bitmask) {
- init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width*s->mb_height);
- }
+ if (mb_bitmask)
+ init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
- if(!Al) {
- s->coefs_finished[c] |= (1LL<<(se+1))-(1LL<<ss);
+ if (!Al) {
+ s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
last_scan = !~s->coefs_finished[c];
}
- if(s->interlaced && s->bottom_field) {
- int offset = linesize >> 1;
- data += offset;
+ if (s->interlaced && s->bottom_field) {
+ int offset = linesize >> 1;
+ data += offset;
reference_data += offset;
}
- for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
- int block_offset = (mb_y*linesize*8 >> s->avctx->lowres);
- uint8_t *ptr = data + block_offset;
- int block_idx = mb_y * s->block_stride[c];
+ for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
+ int block_offset = (mb_y * linesize * 8 >> s->avctx->lowres);
+ uint8_t *ptr = data + block_offset;
+ int block_idx = mb_y * s->block_stride[c];
DCTELEM (*block)[64] = &s->blocks[c][block_idx];
- uint8_t *last_nnz = &s->last_nnz[c][block_idx];
- for(mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
+ uint8_t *last_nnz = &s->last_nnz[c][block_idx];
+ for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
if (!copy_mb) {
- int ret;
- if(Ah)
- ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
- quant_matrix, ss, se, Al, &EOBRUN);
- else
- ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
- quant_matrix, ss, se, Al, &EOBRUN);
- if(ret < 0) {
- av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x);
- return -1;
- }
+ int ret;
+ if (Ah)
+ ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
+ quant_matrix, ss, se, Al, &EOBRUN);
+ else
+ ret = decode_block_progressive(s, *block, last_nnz, s->ac_index[0],
+ quant_matrix, ss, se, Al, &EOBRUN);
+ if (ret < 0) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "error y=%d x=%d\n", mb_y, mb_x);
+ return -1;
+ }
}
- if(last_scan) {
+ if (last_scan) {
if (copy_mb) {
- mjpeg_copy_block(ptr, reference_data + block_offset, linesize, s->avctx->lowres);
+ mjpeg_copy_block(ptr, reference_data + block_offset,
+ linesize, s->avctx->lowres);
} else {
- s->dsp.idct_put(ptr, linesize, *block);
- ptr += 8 >> s->avctx->lowres;
+ s->dsp.idct_put(ptr, linesize, *block);
+ ptr += 8 >> s->avctx->lowres;
}
}
}
@@ -966,36 +1010,36 @@ static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss, int s
return 0;
}
-int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
- const uint8_t *mb_bitmask, const AVFrame *reference)
+int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
+ const AVFrame *reference)
{
int len, nb_components, i, h, v, predictor, point_transform;
int index, id;
- const int block_size= s->lossless ? 1 : 8;
+ const int block_size = s->lossless ? 1 : 8;
int ilv, prev_shift;
/* XXX: verify len field validity */
len = get_bits(&s->gb, 16);
nb_components = get_bits(&s->gb, 8);
- if (nb_components == 0 || nb_components > MAX_COMPONENTS){
- av_log(s->avctx, AV_LOG_ERROR, "decode_sos: nb_components (%d) unsupported\n", nb_components);
+ if (nb_components == 0 || nb_components > MAX_COMPONENTS) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "decode_sos: nb_components (%d) unsupported\n", nb_components);
return -1;
}
- if (len != 6+2*nb_components)
- {
+ if (len != 6 + 2 * nb_components) {
av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len);
return -1;
}
- for(i=0;i<nb_components;i++) {
+ for (i = 0; i < nb_components; i++) {
id = get_bits(&s->gb, 8) - 1;
av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id);
/* find component index */
- for(index=0;index<s->nb_components;index++)
+ for (index = 0; index < s->nb_components; index++)
if (id == s->component_id[index])
break;
- if (index == s->nb_components)
- {
- av_log(s->avctx, AV_LOG_ERROR, "decode_sos: index(%d) out of components\n", index);
+ if (index == s->nb_components) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "decode_sos: index(%d) out of components\n", index);
return -1;
}
/* Metasoft MJPEG codec has Cb and Cr swapped */
@@ -1006,8 +1050,8 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
s->comp_index[i] = index;
s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
- s->h_scount[i] = s->h_count[index];
- s->v_scount[i] = s->v_count[index];
+ s->h_scount[i] = s->h_count[index];
+ s->v_scount[i] = s->v_count[index];
s->dc_index[i] = get_bits(&s->gb, 4);
s->ac_index[i] = get_bits(&s->gb, 4);
@@ -1015,34 +1059,36 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
goto out_of_range;
- if (!s->vlcs[0][s->dc_index[i]].table || !s->vlcs[1][s->ac_index[i]].table)
+ if (!s->vlcs[0][s->dc_index[i]].table ||
+ !s->vlcs[1][s->ac_index[i]].table)
goto out_of_range;
}
- predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
- ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
- prev_shift = get_bits(&s->gb, 4); /* Ah */
- point_transform= get_bits(&s->gb, 4); /* Al */
+ predictor = get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
+ ilv = get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
+ prev_shift = get_bits(&s->gb, 4); /* Ah */
+ point_transform = get_bits(&s->gb, 4); /* Al */
- for(i=0;i<nb_components;i++)
+ for (i = 0; i < nb_components; i++)
s->last_dc[i] = 1024;
if (nb_components > 1) {
/* interleaved stream */
s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
- } else if(!s->ls) { /* skip this for JPEG-LS */
+ } else if (!s->ls) { /* skip this for JPEG-LS */
h = s->h_max / s->h_scount[0];
v = s->v_max / s->v_scount[0];
- s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
- s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
+ s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
+ s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
s->nb_blocks[0] = 1;
- s->h_scount[0] = 1;
- s->v_scount[0] = 1;
+ s->h_scount[0] = 1;
+ s->v_scount[0] = 1;
}
- if(s->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
+ if (s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
+ s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
predictor, point_transform, ilv, s->bits,
s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
@@ -1051,30 +1097,31 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s,
for (i = s->mjpb_skiptosod; i > 0; i--)
skip_bits(&s->gb, 8);
- if(s->lossless){
- if(CONFIG_JPEGLS_DECODER && s->ls){
-// for(){
+ if (s->lossless) {
+ if (CONFIG_JPEGLS_DECODER && s->ls) {
+// for () {
// reset_ls_coding_parameters(s, 0);
- if(ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
+ if (ff_jpegls_decode_picture(s, predictor, point_transform, ilv) < 0)
return -1;
- }else{
- if(s->rgb){
- if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
+ } else {
+ if (s->rgb) {
+ if (ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
return -1;
- }else{
- if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
+ } else {
+ if (ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
return -1;
}
}
- }else{
- if(s->progressive && predictor) {
- if(mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift, point_transform,
- mb_bitmask, reference) < 0)
+ } else {
+ if (s->progressive && predictor) {
+ if (mjpeg_decode_scan_progressive_ac(s, predictor, ilv, prev_shift,
+ point_transform,
+ mb_bitmask, reference) < 0)
return -1;
} else {
- if(mjpeg_decode_scan(s, nb_components, prev_shift, point_transform,
- mb_bitmask, reference) < 0)
+ if (mjpeg_decode_scan(s, nb_components, prev_shift, point_transform,
+ mb_bitmask, reference) < 0)
return -1;
}
}
@@ -1090,8 +1137,9 @@ static int mjpeg_decode_dri(MJpegDecodeContext *s)
if (get_bits(&s->gb, 16) != 4)
return -1;
s->restart_interval = get_bits(&s->gb, 16);
- s->restart_count = 0;
- av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval);
+ s->restart_count = 0;
+ av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n",
+ s->restart_interval);
return 0;
}
@@ -1103,22 +1151,20 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
len = get_bits(&s->gb, 16);
if (len < 5)
return -1;
- if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
+ if (8 * len + get_bits_count(&s->gb) > s->gb.size_in_bits)
return -1;
- id = get_bits_long(&s->gb, 32);
- id = av_be2ne32(id);
+ id = get_bits_long(&s->gb, 32);
+ id = av_be2ne32(id);
len -= 6;
- if(s->avctx->debug & FF_DEBUG_STARTCODE){
+ if (s->avctx->debug & FF_DEBUG_STARTCODE)
av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
- }
/* Buggy AVID, it puts EOI only at every 10th frame. */
/* Also, this fourcc is used by non-avid files too, it holds some
information, but it's always present in AVID-created files. */
- if (id == AV_RL32("AVI1"))
- {
+ if (id == AV_RL32("AVI1")) {
/* structure:
4bytes AVI1
1bytes polarity
@@ -1126,12 +1172,14 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
4bytes field_size
4bytes field_size_less_padding
*/
- s->buggy_avid = 1;
-// if (s->first_picture)
-// printf("mjpeg: workarounding buggy AVID\n");
+ s->buggy_avid = 1;
+// if (s->first_picture)
+// printf("mjpeg: workarounding buggy AVID\n");
i = get_bits(&s->gb, 8);
- if (i==2) s->bottom_field= 1;
- else if(i==1) s->bottom_field= 0;
+ if (i == 2)
+ s->bottom_field = 1;
+ else if (i == 1)
+ s->bottom_field = 0;
#if 0
skip_bits(&s->gb, 8);
skip_bits(&s->gb, 32);
@@ -1145,63 +1193,61 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
// len -= 2;
- if (id == AV_RL32("JFIF"))
- {
+ if (id == AV_RL32("JFIF")) {
int t_w, t_h, v1, v2;
skip_bits(&s->gb, 8); /* the trailing zero-byte */
- v1= get_bits(&s->gb, 8);
- v2= get_bits(&s->gb, 8);
+ v1 = get_bits(&s->gb, 8);
+ v2 = get_bits(&s->gb, 8);
skip_bits(&s->gb, 8);
- s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
- s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
+ s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 16);
+ s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 16);
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
- v1, v2,
- s->avctx->sample_aspect_ratio.num,
- s->avctx->sample_aspect_ratio.den
- );
+ av_log(s->avctx, AV_LOG_INFO,
+ "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
+ v1, v2,
+ s->avctx->sample_aspect_ratio.num,
+ s->avctx->sample_aspect_ratio.den);
t_w = get_bits(&s->gb, 8);
t_h = get_bits(&s->gb, 8);
- if (t_w && t_h)
- {
+ if (t_w && t_h) {
/* skip thumbnail */
- if (len-10-(t_w*t_h*3) > 0)
- len -= t_w*t_h*3;
+ if (len -10 - (t_w * t_h * 3) > 0)
+ len -= t_w * t_h * 3;
}
len -= 10;
goto out;
}
- if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e'))
- {
+ if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
skip_bits(&s->gb, 16); /* version */
skip_bits(&s->gb, 16); /* flags0 */
skip_bits(&s->gb, 16); /* flags1 */
- skip_bits(&s->gb, 8); /* transform */
+ skip_bits(&s->gb, 8); /* transform */
len -= 7;
goto out;
}
- if (id == AV_RL32("LJIF")){
+ if (id == AV_RL32("LJIF")) {
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
+ av_log(s->avctx, AV_LOG_INFO,
+ "Pegasus lossless jpeg header found\n");
skip_bits(&s->gb, 16); /* version ? */
skip_bits(&s->gb, 16); /* unknwon always 0? */
skip_bits(&s->gb, 16); /* unknwon always 0? */
skip_bits(&s->gb, 16); /* unknwon always 0? */
- switch( get_bits(&s->gb, 8)){
+ switch (get_bits(&s->gb, 8)) {
case 1:
- s->rgb= 1;
- s->pegasus_rct=0;
+ s->rgb = 1;
+ s->pegasus_rct = 0;
break;
case 2:
- s->rgb= 1;
- s->pegasus_rct=1;
+ s->rgb = 1;
+ s->pegasus_rct = 1;
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
@@ -1211,13 +1257,12 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
}
/* Apple MJPEG-A */
- if ((s->start_code == APP1) && (len > (0x28 - 8)))
- {
- id = get_bits_long(&s->gb, 32);
- id = av_be2ne32(id);
+ if ((s->start_code == APP1) && (len > (0x28 - 8))) {
+ id = get_bits_long(&s->gb, 32);
+ id = av_be2ne32(id);
len -= 4;
- if (id == AV_RL32("mjpg")) /* Apple MJPEG-A */
- {
+ /* Apple MJPEG-A */
+ if (id == AV_RL32("mjpg")) {
#if 0
skip_bits(&s->gb, 32); /* field size */
skip_bits(&s->gb, 32); /* pad field size */
@@ -1236,8 +1281,9 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
out:
/* slow but needed for extreme adobe jpegs */
if (len < 0)
- av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
- while(--len > 0)
+ av_log(s->avctx, AV_LOG_ERROR,
+ "mjpeg: error, decode_app parser read over the end\n");
+ while (--len > 0)
skip_bits(&s->gb, 8);
return 0;
@@ -1246,34 +1292,31 @@ out:
static int mjpeg_decode_com(MJpegDecodeContext *s)
{
int len = get_bits(&s->gb, 16);
- if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
+ if (len >= 2 &&
+ 8 * len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
char *cbuf = av_malloc(len - 1);
if (cbuf) {
int i;
for (i = 0; i < len - 2; i++)
cbuf[i] = get_bits(&s->gb, 8);
- if (i > 0 && cbuf[i-1] == '\n')
- cbuf[i-1] = 0;
+ if (i > 0 && cbuf[i - 1] == '\n')
+ cbuf[i - 1] = 0;
else
cbuf[i] = 0;
- if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ if (s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
/* buggy avid, it puts EOI only at every 10th frame */
- if (!strcmp(cbuf, "AVID"))
- {
+ if (!strcmp(cbuf, "AVID")) {
s->buggy_avid = 1;
- // if (s->first_picture)
- // printf("mjpeg: workarounding buggy AVID\n");
- }
- else if(!strcmp(cbuf, "CS=ITU601")){
- s->cs_itu601= 1;
- }
- else if((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
- (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20))){
+ // if (s->first_picture)
+ // printf("mjpeg: workarounding buggy AVID\n");
+ } else if (!strcmp(cbuf, "CS=ITU601"))
+ s->cs_itu601 = 1;
+ else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
+ (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
s->flipped = 1;
- }
av_free(cbuf);
}
@@ -1290,12 +1333,12 @@ static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
unsigned int v, v2;
int val;
#ifdef DEBUG
- int skipped=0;
+ int skipped = 0;
#endif
buf_ptr = *pbuf_ptr;
while (buf_ptr < buf_end) {
- v = *buf_ptr++;
+ v = *buf_ptr++;
v2 = *buf_ptr;
if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
val = *buf_ptr++;
@@ -1314,105 +1357,97 @@ found:
int ff_mjpeg_find_marker(MJpegDecodeContext *s,
const uint8_t **buf_ptr, const uint8_t *buf_end,
- const uint8_t **unescaped_buf_ptr, int *unescaped_buf_size)
+ const uint8_t **unescaped_buf_ptr,
+ int *unescaped_buf_size)
{
int start_code;
start_code = find_marker(buf_ptr, buf_end);
- if ((buf_end - *buf_ptr) > s->buffer_size)
- {
- av_free(s->buffer);
- s->buffer_size = buf_end - *buf_ptr;
- s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
- av_log(s->avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n",
- s->buffer_size);
- }
-
- /* unescape buffer of SOS, use special treatment for JPEG-LS */
- if (start_code == SOS && !s->ls)
- {
- const uint8_t *src = *buf_ptr;
- uint8_t *dst = s->buffer;
+ if ((buf_end - *buf_ptr) > s->buffer_size) {
+ av_free(s->buffer);
+ s->buffer_size = buf_end - *buf_ptr;
+ s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ av_log(s->avctx, AV_LOG_DEBUG,
+ "buffer too small, expanding to %d bytes\n", s->buffer_size);
+ }
- while (src<buf_end)
- {
- uint8_t x = *(src++);
+ /* unescape buffer of SOS, use special treatment for JPEG-LS */
+ if (start_code == SOS && !s->ls) {
+ const uint8_t *src = *buf_ptr;
+ uint8_t *dst = s->buffer;
- *(dst++) = x;
- if (s->avctx->codec_id != CODEC_ID_THP)
- {
- if (x == 0xff) {
- while (src < buf_end && x == 0xff)
- x = *(src++);
-
- if (x >= 0xd0 && x <= 0xd7)
- *(dst++) = x;
- else if (x)
- break;
- }
- }
- }
- *unescaped_buf_ptr = s->buffer;
- *unescaped_buf_size = dst - s->buffer;
+ while (src < buf_end) {
+ uint8_t x = *(src++);
- av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
- (buf_end - *buf_ptr) - (dst - s->buffer));
- }
- else if(start_code == SOS && s->ls){
- const uint8_t *src = *buf_ptr;
- uint8_t *dst = s->buffer;
- int bit_count = 0;
- int t = 0, b = 0;
- PutBitContext pb;
-
- s->cur_scan++;
-
- /* find marker */
- while (src + t < buf_end){
- uint8_t x = src[t++];
- if (x == 0xff){
- while((src + t < buf_end) && x == 0xff)
- x = src[t++];
- if (x & 0x80) {
- t -= 2;
- break;
- }
- }
- }
- bit_count = t * 8;
-
- init_put_bits(&pb, dst, t);
-
- /* unescape bitstream */
- while(b < t){
- uint8_t x = src[b++];
- put_bits(&pb, 8, x);
- if(x == 0xFF){
- x = src[b++];
- put_bits(&pb, 7, x);
- bit_count--;
- }
- }
- flush_put_bits(&pb);
+ *(dst++) = x;
+ if (s->avctx->codec_id != CODEC_ID_THP) {
+ if (x == 0xff) {
+ while (src < buf_end && x == 0xff)
+ x = *(src++);
- *unescaped_buf_ptr = dst;
- *unescaped_buf_size = (bit_count + 7) >> 3;
+ if (x >= 0xd0 && x <= 0xd7)
+ *(dst++) = x;
+ else if (x)
+ break;
}
- else
- {
- *unescaped_buf_ptr = *buf_ptr;
- *unescaped_buf_size = buf_end - *buf_ptr;
+ }
+ }
+ *unescaped_buf_ptr = s->buffer;
+ *unescaped_buf_size = dst - s->buffer;
+
+ av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
+ (buf_end - *buf_ptr) - (dst - s->buffer));
+ } else if (start_code == SOS && s->ls) {
+ const uint8_t *src = *buf_ptr;
+ uint8_t *dst = s->buffer;
+ int bit_count = 0;
+ int t = 0, b = 0;
+ PutBitContext pb;
+
+ s->cur_scan++;
+
+ /* find marker */
+ while (src + t < buf_end) {
+ uint8_t x = src[t++];
+ if (x == 0xff) {
+ while ((src + t < buf_end) && x == 0xff)
+ x = src[t++];
+ if (x & 0x80) {
+ t -= 2;
+ break;
}
+ }
+ }
+ bit_count = t * 8;
+ init_put_bits(&pb, dst, t);
+
+ /* unescape bitstream */
+ while (b < t) {
+ uint8_t x = src[b++];
+ put_bits(&pb, 8, x);
+ if (x == 0xFF) {
+ x = src[b++];
+ put_bits(&pb, 7, x);
+ bit_count--;
+ }
+ }
+ flush_put_bits(&pb);
+
+ *unescaped_buf_ptr = dst;
+ *unescaped_buf_size = (bit_count + 7) >> 3;
+ } else {
+ *unescaped_buf_ptr = *buf_ptr;
+ *unescaped_buf_size = buf_end - *buf_ptr;
+ }
return start_code;
}
-int ff_mjpeg_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- AVPacket *avpkt)
+int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
+ AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
+ int buf_size = avpkt->size;
MJpegDecodeContext *s = avctx->priv_data;
const uint8_t *buf_end, *buf_ptr;
const uint8_t *unescaped_buf_ptr;
@@ -1426,149 +1461,155 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx,
while (buf_ptr < buf_end) {
/* find start next marker */
start_code = ff_mjpeg_find_marker(s, &buf_ptr, buf_end,
- &unescaped_buf_ptr, &unescaped_buf_size);
- {
- /* EOF */
- if (start_code < 0) {
- goto the_end;
- } else {
- av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n", start_code, buf_end - buf_ptr);
-
- init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size*8);
-
- s->start_code = start_code;
- if(s->avctx->debug & FF_DEBUG_STARTCODE){
- av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
- }
-
- /* process markers */
- if (start_code >= 0xd0 && start_code <= 0xd7) {
- av_log(avctx, AV_LOG_DEBUG, "restart marker: %d\n", start_code&0x0f);
- /* APP fields */
- } else if (start_code >= APP0 && start_code <= APP15) {
- mjpeg_decode_app(s);
- /* Comment */
- } else if (start_code == COM){
- mjpeg_decode_com(s);
+ &unescaped_buf_ptr,
+ &unescaped_buf_size);
+ /* EOF */
+ if (start_code < 0) {
+ goto the_end;
+ } else {
+ av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
+ start_code, buf_end - buf_ptr);
+
+ init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
+
+ s->start_code = start_code;
+ if (s->avctx->debug & FF_DEBUG_STARTCODE)
+ av_log(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
+
+ /* process markers */
+ if (start_code >= 0xd0 && start_code <= 0xd7)
+ av_log(avctx, AV_LOG_DEBUG,
+ "restart marker: %d\n", start_code & 0x0f);
+ /* APP fields */
+ else if (start_code >= APP0 && start_code <= APP15)
+ mjpeg_decode_app(s);
+ /* Comment */
+ else if (start_code == COM)
+ mjpeg_decode_com(s);
+
+ switch (start_code) {
+ case SOI:
+ s->restart_interval = 0;
+ s->restart_count = 0;
+ /* nothing to do on SOI */
+ break;
+ case DQT:
+ ff_mjpeg_decode_dqt(s);
+ break;
+ case DHT:
+ if (ff_mjpeg_decode_dht(s) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
+ return -1;
}
-
- switch(start_code) {
- case SOI:
- s->restart_interval = 0;
-
- s->restart_count = 0;
- /* nothing to do on SOI */
- break;
- case DQT:
- ff_mjpeg_decode_dqt(s);
- break;
- case DHT:
- if(ff_mjpeg_decode_dht(s) < 0){
- av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
- return -1;
- }
- break;
- case SOF0:
- case SOF1:
- s->lossless=0;
- s->ls=0;
- s->progressive=0;
- if (ff_mjpeg_decode_sof(s) < 0)
- return -1;
- break;
- case SOF2:
- s->lossless=0;
- s->ls=0;
- s->progressive=1;
- if (ff_mjpeg_decode_sof(s) < 0)
- return -1;
- break;
- case SOF3:
- s->lossless=1;
- s->ls=0;
- s->progressive=0;
- if (ff_mjpeg_decode_sof(s) < 0)
- return -1;
- break;
- case SOF48:
- s->lossless=1;
- s->ls=1;
- s->progressive=0;
- if (ff_mjpeg_decode_sof(s) < 0)
- return -1;
- break;
- case LSE:
- if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
- return -1;
+ break;
+ case SOF0:
+ case SOF1:
+ s->lossless = 0;
+ s->ls = 0;
+ s->progressive = 0;
+ if (ff_mjpeg_decode_sof(s) < 0)
+ return -1;
+ break;
+ case SOF2:
+ s->lossless = 0;
+ s->ls = 0;
+ s->progressive = 1;
+ if (ff_mjpeg_decode_sof(s) < 0)
+ return -1;
+ break;
+ case SOF3:
+ s->lossless = 1;
+ s->ls = 0;
+ s->progressive = 0;
+ if (ff_mjpeg_decode_sof(s) < 0)
+ return -1;
+ break;
+ case SOF48:
+ s->lossless = 1;
+ s->ls = 1;
+ s->progressive = 0;
+ if (ff_mjpeg_decode_sof(s) < 0)
+ return -1;
+ break;
+ case LSE:
+ if (!CONFIG_JPEGLS_DECODER || ff_jpegls_decode_lse(s) < 0)
+ return -1;
+ break;
+ case EOI:
+ s->cur_scan = 0;
+ if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
break;
- case EOI:
- s->cur_scan = 0;
- if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
- break;
eoi_parser:
- if (!s->got_picture) {
- av_log(avctx, AV_LOG_WARNING, "Found EOI before any SOF, ignoring\n");
- break;
+ if (!s->got_picture) {
+ av_log(avctx, AV_LOG_WARNING,
+ "Found EOI before any SOF, ignoring\n");
+ break;
}
- if (s->interlaced) {
- s->bottom_field ^= 1;
- /* if not bottom field, do not output image yet */
- if (s->bottom_field == !s->interlace_polarity)
- goto not_the_end;
+ if (s->interlaced) {
+ s->bottom_field ^= 1;
+ /* if not bottom field, do not output image yet */
+ if (s->bottom_field == !s->interlace_polarity)
+ goto not_the_end;
}
- *picture = *s->picture_ptr;
+ *picture = *s->picture_ptr;
*data_size = sizeof(AVFrame);
- if(!s->lossless){
- picture->quality= FFMAX3(s->qscale[0], s->qscale[1], s->qscale[2]);
- picture->qstride= 0;
- picture->qscale_table= s->qscale_table;
- memset(picture->qscale_table, picture->quality, (s->width+15)/16);
- if(avctx->debug & FF_DEBUG_QP)
- av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
- picture->quality*= FF_QP2LAMBDA;
+ if (!s->lossless) {
+ picture->quality = FFMAX3(s->qscale[0],
+ s->qscale[1],
+ s->qscale[2]);
+ picture->qstride = 0;
+ picture->qscale_table = s->qscale_table;
+ memset(picture->qscale_table, picture->quality,
+ (s->width + 15) / 16);
+ if (avctx->debug & FF_DEBUG_QP)
+ av_log(avctx, AV_LOG_DEBUG,
+ "QP: %d\n", picture->quality);
+ picture->quality *= FF_QP2LAMBDA;
}
- goto the_end;
- case SOS:
- if (!s->got_picture) {
- av_log(avctx, AV_LOG_WARNING, "Can not process SOS before SOF, skipping\n");
- break;
- }
- if (ff_mjpeg_decode_sos(s, NULL, NULL) < 0 &&
- (avctx->err_recognition & AV_EF_EXPLODE))
- return AVERROR_INVALIDDATA;
- /* buggy avid puts EOI every 10-20th frame */
- /* if restart period is over process EOI */
- if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
- goto eoi_parser;
- break;
- case DRI:
- mjpeg_decode_dri(s);
- break;
- case SOF5:
- case SOF6:
- case SOF7:
- case SOF9:
- case SOF10:
- case SOF11:
- case SOF13:
- case SOF14:
- case SOF15:
- case JPG:
- av_log(avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
+ goto the_end;
+ case SOS:
+ if (!s->got_picture) {
+ av_log(avctx, AV_LOG_WARNING,
+ "Can not process SOS before SOF, skipping\n");
break;
-// default:
-// printf("mjpeg: unsupported marker (%x)\n", start_code);
-// break;
- }
+ }
+ if (ff_mjpeg_decode_sos(s, NULL, NULL) < 0 &&
+ (avctx->err_recognition & AV_EF_EXPLODE))
+ return AVERROR_INVALIDDATA;
+ /* buggy avid puts EOI every 10-20th frame */
+ /* if restart period is over process EOI */
+ if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
+ goto eoi_parser;
+ break;
+ case DRI:
+ mjpeg_decode_dri(s);
+ break;
+ case SOF5:
+ case SOF6:
+ case SOF7:
+ case SOF9:
+ case SOF10:
+ case SOF11:
+ case SOF13:
+ case SOF14:
+ case SOF15:
+ case JPG:
+ av_log(avctx, AV_LOG_ERROR,
+ "mjpeg: unsupported coding type (%x)\n", start_code);
+ break;
+// default:
+// printf("mjpeg: unsupported marker (%x)\n", start_code);
+// break;
+ }
not_the_end:
- /* eof process start code */
- buf_ptr += (get_bits_count(&s->gb)+7)/8;
- av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n",
- (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
- }
+ /* eof process start code */
+ buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
+ av_log(avctx, AV_LOG_DEBUG,
+ "marker parser used %d bytes (%d bits)\n",
+ (get_bits_count(&s->gb) + 7) / 8, get_bits_count(&s->gb));
}
}
if (s->got_picture) {
@@ -1578,8 +1619,9 @@ not_the_end:
av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
return -1;
the_end:
- av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n", buf_end - buf_ptr);
-// return buf_end - buf_ptr;
+ av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
+ buf_end - buf_ptr);
+// return buf_end - buf_ptr;
return buf_ptr - buf;
}
@@ -1594,13 +1636,13 @@ av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
av_free(s->buffer);
av_free(s->qscale_table);
av_freep(&s->ljpeg_buffer);
- s->ljpeg_buffer_size=0;
+ s->ljpeg_buffer_size = 0;
- for(i=0;i<3;i++) {
- for(j=0;j<4;j++)
+ for (i = 0; i < 3; i++) {
+ for (j = 0; j < 4; j++)
free_vlc(&s->vlcs[i][j]);
}
- for(i=0; i<MAX_COMPONENTS; i++) {
+ for (i = 0; i < MAX_COMPONENTS; i++) {
av_freep(&s->blocks[i]);
av_freep(&s->last_nnz[i]);
}
@@ -1610,7 +1652,8 @@ av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
#define OFFSET(x) offsetof(MJpegDecodeContext, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
- { "extern_huff", "Use external huffman table.", OFFSET(extern_huff), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD },
+ { "extern_huff", "Use external huffman table.",
+ OFFSET(extern_huff), AV_OPT_TYPE_INT, { 0 }, 0, 1, VD },
{ NULL },
};
@@ -1630,8 +1673,8 @@ AVCodec ff_mjpeg_decoder = {
.close = ff_mjpeg_decode_end,
.decode = ff_mjpeg_decode_frame,
.capabilities = CODEC_CAP_DR1,
- .max_lowres = 3,
- .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
+ .max_lowres = 3,
+ .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
.priv_class = &mjpegdec_class,
};
@@ -1644,6 +1687,6 @@ AVCodec ff_thp_decoder = {
.close = ff_mjpeg_decode_end,
.decode = ff_mjpeg_decode_frame,
.capabilities = CODEC_CAP_DR1,
- .max_lowres = 3,
- .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
+ .max_lowres = 3,
+ .long_name = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 00:54:44 +0000