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use AVRational and ff_frame_rate_tab for frame_rate 

Originally committed as revision 6905 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2006-11-05 19:24:23 +00:00
parent bcea960561
commit 8cd13128b8
1 changed files with 8 additions and 30 deletions
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38
libavcodec/parser.c
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@ -225,7 +225,7 @@ typedef struct ParseContext1{
ParseContext pc;
/* XXX/FIXME PC1 vs. PC */
/* MPEG2 specific */
int frame_rate;
AVRational frame_rate;
int progressive_sequence;
int width, height;
@ -296,32 +296,10 @@ int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size)
return 0;
}
/* XXX: merge with libavcodec ? */
#define MPEG1_FRAME_RATE_BASE 1001
static const int frame_rate_tab[16] = {
0,
24000,
24024,
25025,
30000,
30030,
50050,
60000,
60060,
// Xing's 15fps: (9)
15015,
// libmpeg3's "Unofficial economy rates": (10-13)
5005,
10010,
12012,
15015,
// random, just to avoid segfault !never encode these
25025,
25025,
};
#ifdef CONFIG_MPEGVIDEO_PARSER
extern const AVRational ff_frame_rate_tab[];
//FIXME move into mpeg12.c
static void mpegvideo_extract_headers(AVCodecParserContext *s,
AVCodecContext *avctx,
@ -353,8 +331,8 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
avcodec_set_dimensions(avctx, pc->width, pc->height);
frame_rate_index = buf[3] & 0xf;
pc->frame_rate = avctx->time_base.den = frame_rate_tab[frame_rate_index];
avctx->time_base.num = MPEG1_FRAME_RATE_BASE;
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;
avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
avctx->codec_id = CODEC_ID_MPEG1VIDEO;
avctx->sub_id = 1;
@ -378,8 +356,8 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
pc->height |=( vert_size_ext << 12);
avctx->bit_rate += (bit_rate_ext << 18) * 400;
avcodec_set_dimensions(avctx, pc->width, pc->height);
avctx->time_base.den = pc->frame_rate * (frame_rate_ext_n + 1);
avctx->time_base.num = MPEG1_FRAME_RATE_BASE * (frame_rate_ext_d + 1);
avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1);
avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
avctx->codec_id = CODEC_ID_MPEG2VIDEO;
avctx->sub_id = 2; /* forces MPEG2 */
}