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mpegvideo_parser: export pixel format and dimensions

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This commit is contained in:
Anton Khirnov 2015-07-06 21:53:13 +02:00
parent 9f4c7397a2
commit ab05ed4c32
1 changed files with 17 additions and 0 deletions
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17
libavcodec/mpegvideo_parser.c
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@ -44,6 +44,8 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
int top_field_first, repeat_first_field, progressive_frame;
int horiz_size_ext, vert_size_ext, bit_rate_ext;
int did_set_size=0;
int chroma_format;
enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
//FIXME replace the crap with get_bits()
s->repeat_pict = 0;
@ -65,6 +67,7 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
ff_set_dimensions(avctx, pc->width, pc->height);
did_set_size=1;
}
pix_fmt = AV_PIX_FMT_YUV420P;
frame_rate_index = buf[3] & 0xf;
pc->frame_rate = avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_index];
avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
@ -85,6 +88,13 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
pc->progressive_sequence = buf[1] & (1 << 3);
avctx->has_b_frames= !(buf[5] >> 7);
chroma_format = (buf[1] >> 1) & 3;
switch (chroma_format) {
case 1: pix_fmt = AV_PIX_FMT_YUV420P; break;
case 2: pix_fmt = AV_PIX_FMT_YUV422P; break;
case 3: pix_fmt = AV_PIX_FMT_YUV444P; break;
}
pc->width |=(horiz_size_ext << 12);
pc->height |=( vert_size_ext << 12);
avctx->bit_rate += (bit_rate_ext << 18) * 400;
@ -138,6 +148,13 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
}
}
the_end: ;
if (pix_fmt != AV_PIX_FMT_NONE) {
s->format = pix_fmt;
s->width = s->coded_width = pc->width;
s->height = s->coded_height = pc->height;
}
#if FF_API_AVCTX_TIMEBASE
if (avctx->framerate.num)
avctx->time_base = av_inv_q(avctx->framerate);