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path: root/src/libffmpeg/libavcodec/h263dec.c
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Diffstat (limited to 'src/libffmpeg/libavcodec/h263dec.c')
-rw-r--r--src/libffmpeg/libavcodec/h263dec.c138
1 files changed, 94 insertions, 44 deletions
diff --git a/src/libffmpeg/libavcodec/h263dec.c b/src/libffmpeg/libavcodec/h263dec.c
index 3733ed565..e909ac56e 100644
--- a/src/libffmpeg/libavcodec/h263dec.c
+++ b/src/libffmpeg/libavcodec/h263dec.c
@@ -47,10 +47,22 @@ static int h263_decode_init(AVCodecContext *avctx)
case CODEC_ID_MPEG4:
s->time_increment_bits = 4; /* default value for broken headers */
s->h263_pred = 1;
+ s->has_b_frames = 1;
break;
- case CODEC_ID_MSMPEG4:
+ case CODEC_ID_MSMPEG4V1:
s->h263_msmpeg4 = 1;
s->h263_pred = 1;
+ s->msmpeg4_version=1;
+ break;
+ case CODEC_ID_MSMPEG4V2:
+ s->h263_msmpeg4 = 1;
+ s->h263_pred = 1;
+ s->msmpeg4_version=2;
+ break;
+ case CODEC_ID_MSMPEG4V3:
+ s->h263_msmpeg4 = 1;
+ s->h263_pred = 1;
+ s->msmpeg4_version=3;
break;
case CODEC_ID_H263I:
s->h263_intel = 1;
@@ -60,7 +72,7 @@ static int h263_decode_init(AVCodecContext *avctx)
}
/* for h263, we allocate the images after having read the header */
- if (avctx->codec->id != CODEC_ID_H263)
+ if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
if (MPV_common_init(s) < 0)
return -1;
@@ -115,22 +127,25 @@ static int h263_decode_frame(AVCodecContext *avctx,
ret = intel_h263_decode_picture_header(s);
} else {
ret = h263_decode_picture_header(s);
- /* After H263 header decode we have the height, width, */
+ }
+
+ /* After H263 & mpeg4 header decode we have the height, width,*/
/* and other parameters. So then we could init the picture */
/* FIXME: By the way H263 decoder is evolving it should have */
/* an H263EncContext */
- if (!s->context_initialized) {
- avctx->width = s->width;
- avctx->height = s->height;
- if (MPV_common_init(s) < 0)
- return -1;
- } else if (s->width != avctx->width || s->height != avctx->height) {
- /* H.263 could change picture size any time */
- MPV_common_end(s);
- if (MPV_common_init(s) < 0)
- return -1;
- }
+ if (!s->context_initialized) {
+ avctx->width = s->width;
+ avctx->height = s->height;
+ avctx->aspect_ratio_info= s->aspect_ratio_info;
+ if (MPV_common_init(s) < 0)
+ return -1;
+ } else if (s->width != avctx->width || s->height != avctx->height) {
+ /* H.263 could change picture size any time */
+ MPV_common_end(s);
+ if (MPV_common_init(s) < 0)
+ return -1;
}
+
if (ret < 0)
return -1;
@@ -141,6 +156,12 @@ static int h263_decode_frame(AVCodecContext *avctx,
#endif
/* decode each macroblock */
+ s->block_wrap[0]=
+ s->block_wrap[1]=
+ s->block_wrap[2]=
+ s->block_wrap[3]= s->mb_width*2 + 2;
+ s->block_wrap[4]=
+ s->block_wrap[5]= s->mb_width + 2;
for(s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) {
/* Check for GOB headers on H.263 */
/* FIXME: In the future H.263+ will have intra prediction */
@@ -148,7 +169,20 @@ static int h263_decode_frame(AVCodecContext *avctx,
if (s->mb_y && !s->h263_pred) {
s->first_gob_line = h263_decode_gob_header(s);
}
+
+ s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1;
+ s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1);
+ s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1;
+ s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2);
+ s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1) + s->block_wrap[0]*(s->mb_height*2 + 2);
+ s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2);
for(s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
+ s->block_index[0]+=2;
+ s->block_index[1]+=2;
+ s->block_index[2]+=2;
+ s->block_index[3]+=2;
+ s->block_index[4]++;
+ s->block_index[5]++;
#ifdef DEBUG
printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
#endif
@@ -163,28 +197,8 @@ static int h263_decode_frame(AVCodecContext *avctx,
s->y_dc_scale = 8;
s->c_dc_scale = 8;
}
-
-#ifdef HAVE_MMX
- if (mm_flags & MM_MMX) {
- asm volatile(
- "pxor %%mm7, %%mm7 \n\t"
- "movl $-128*6, %%eax \n\t"
- "1: \n\t"
- "movq %%mm7, (%0, %%eax) \n\t"
- "movq %%mm7, 8(%0, %%eax) \n\t"
- "movq %%mm7, 16(%0, %%eax) \n\t"
- "movq %%mm7, 24(%0, %%eax) \n\t"
- "addl $32, %%eax \n\t"
- " js 1b \n\t"
- : : "r" (((int)s->block)+128*6)
- : "%eax"
- );
- }else{
- memset(s->block, 0, sizeof(s->block));
- }
-#else
- memset(s->block, 0, sizeof(s->block));
-#endif
+ clear_blocks(s->block[0]);
+
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
if (s->h263_msmpeg4) {
@@ -208,9 +222,15 @@ static int h263_decode_frame(AVCodecContext *avctx,
if (h > 16)
h = 16;
offset = y * s->linesize;
- src_ptr[0] = s->current_picture[0] + offset;
- src_ptr[1] = s->current_picture[1] + (offset >> 2);
- src_ptr[2] = s->current_picture[2] + (offset >> 2);
+ if(s->pict_type==B_TYPE || (!s->has_b_frames)){
+ src_ptr[0] = s->current_picture[0] + offset;
+ src_ptr[1] = s->current_picture[1] + (offset >> 2);
+ src_ptr[2] = s->current_picture[2] + (offset >> 2);
+ } else {
+ src_ptr[0] = s->last_picture[0] + offset;
+ src_ptr[1] = s->last_picture[1] + (offset >> 2);
+ src_ptr[2] = s->last_picture[2] + (offset >> 2);
+ }
avctx->draw_horiz_band(avctx, src_ptr, s->linesize,
y, s->width, h);
}
@@ -221,9 +241,15 @@ static int h263_decode_frame(AVCodecContext *avctx,
MPV_frame_end(s);
- pict->data[0] = s->current_picture[0];
- pict->data[1] = s->current_picture[1];
- pict->data[2] = s->current_picture[2];
+ if(s->pict_type==B_TYPE || (!s->has_b_frames)){
+ pict->data[0] = s->current_picture[0];
+ pict->data[1] = s->current_picture[1];
+ pict->data[2] = s->current_picture[2];
+ } else {
+ pict->data[0] = s->last_picture[0];
+ pict->data[1] = s->last_picture[1];
+ pict->data[2] = s->last_picture[2];
+ }
pict->linesize[0] = s->linesize;
pict->linesize[1] = s->linesize / 2;
pict->linesize[2] = s->linesize / 2;
@@ -262,10 +288,34 @@ AVCodec h263_decoder = {
CODEC_CAP_DRAW_HORIZ_BAND,
};
-AVCodec msmpeg4_decoder = {
+AVCodec msmpeg4v1_decoder = {
+ "msmpeg4v1",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_MSMPEG4V1,
+ sizeof(MpegEncContext),
+ h263_decode_init,
+ NULL,
+ h263_decode_end,
+ h263_decode_frame,
+ CODEC_CAP_DRAW_HORIZ_BAND,
+};
+
+AVCodec msmpeg4v2_decoder = {
+ "msmpeg4v2",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_MSMPEG4V2,
+ sizeof(MpegEncContext),
+ h263_decode_init,
+ NULL,
+ h263_decode_end,
+ h263_decode_frame,
+ CODEC_CAP_DRAW_HORIZ_BAND,
+};
+
+AVCodec msmpeg4v3_decoder = {
"msmpeg4",
CODEC_TYPE_VIDEO,
- CODEC_ID_MSMPEG4,
+ CODEC_ID_MSMPEG4V3,
sizeof(MpegEncContext),
h263_decode_init,
NULL,
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-01 10:54:00 +0000