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parse aac extradata to fetch channels and sample rate, patch from Netgem

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Originally committed as revision 17506 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-02-21 23:54:50 +00:00
parent c132938d52
commit d2718187b9
1 changed files with 14 additions and 0 deletions
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14
libavformat/flvdec.c
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@ -23,6 +23,8 @@
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavcodec/mpeg4audio.h"
#include "avformat.h"
#include "flv.h"
@ -421,6 +423,18 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
if (type == 0) {
if ((ret = flv_get_extradata(s, st, size)) < 0)
return ret;
if (st->codec->codec_id == CODEC_ID_AAC) {
MPEG4AudioConfig cfg;
ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
st->codec->extradata_size);
if (cfg.chan_config > 7)
return -1;
st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
st->codec->sample_rate = cfg.sample_rate;
dprintf(s, "mp4a config channels %d sample rate %d\n",
st->codec->channels, st->codec->sample_rate);
}
return AVERROR(EAGAIN);
}
}