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Code Issues Releases Activity

Make sure the parsers do not overwrite width/height as this can interfere

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with the decoder.
Fixes issue1135.

Originally committed as revision 20736 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2009-12-05 03:53:12 +00:00
parent 11f6d0982c
commit 442d7dd852
2 changed files with 6 additions and 1 deletions
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2
libavcodec/mpeg4video_parser.c
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@ -82,7 +82,7 @@ static int av_mpeg4_decode_header(AVCodecParserContext *s1,
init_get_bits(gb, buf, 8 * buf_size);
ret = ff_mpeg4_decode_picture_header(s, gb);
if (s->width) {
if (s->width && (!avctx->width || !avctx->height || !avctx->coded_width || !avctx->coded_height)) {
avcodec_set_dimensions(avctx, s->width, s->height);
}
s1->pict_type= s->pict_type;

5
libavcodec/mpegvideo_parser.c
View File

@ -34,6 +34,7 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
int frame_rate_ext_n, frame_rate_ext_d;
int picture_structure, top_field_first, repeat_first_field, progressive_frame;
int horiz_size_ext, vert_size_ext, bit_rate_ext;
int did_set_size=0;
//FIXME replace the crap with get_bits()
s->repeat_pict = 0;
buf_end = buf + buf_size;
@ -51,7 +52,10 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
if (bytes_left >= 7) {
pc->width = (buf[0] << 4) | (buf[1] >> 4);
pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
if(!avctx->width || !avctx->height || !avctx->coded_width || !avctx->coded_height){
avcodec_set_dimensions(avctx, pc->width, pc->height);
did_set_size=1;
}
frame_rate_index = buf[3] & 0xf;
pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num;
pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den;
@ -77,6 +81,7 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
pc->width |=(horiz_size_ext << 12);
pc->height |=( vert_size_ext << 12);
avctx->bit_rate += (bit_rate_ext << 18) * 400;
if(did_set_size)
avcodec_set_dimensions(avctx, pc->width, pc->height);
avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1) * 2;
avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);