breeze/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2026-02-04 14:30:55 +08:00
Code Issues Packages Projects Releases Wiki Activity

mpegaudio: move all header parsing to mpegaudiodecheader.[ch]

Browse Source 
Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
2011-05-19 13:44:11 +01:00
parent 984ece7503
commit 0199e00bc8
6 changed files with 79 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
libavcodec/mpegaudiodecheader.c
View File

@@ -108,3 +108,40 @@ int ff_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
#endif
return 0;
}
int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate, int *channels, int *frame_size, int *bit_rate)
{
MPADecodeHeader s1, *s = &s1;
if (ff_mpa_check_header(head) != 0)
return -1;
if (ff_mpegaudio_decode_header(s, head) != 0) {
return -1;
}
switch(s->layer) {
case 1:
avctx->codec_id = CODEC_ID_MP1;
*frame_size = 384;
break;
case 2:
avctx->codec_id = CODEC_ID_MP2;
*frame_size = 1152;
break;
default:
case 3:
avctx->codec_id = CODEC_ID_MP3;
if (s->lsf)
*frame_size = 576;
else
*frame_size = 1152;
break;
}
*sample_rate = s->sample_rate;
*channels = s->nb_channels;
*bit_rate = s->bit_rate;
avctx->sub_id = s->layer;
return s->frame_size;
}