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cbr audio muxing fix

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Originally committed as revision 3661 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-11-06 19:11:34 +00:00
parent 70122f2902
commit 359fa0febc
4 changed files with 41 additions and 39 deletions
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17
libavcodec/pcm.c
View File

@ -127,6 +127,23 @@ static int pcm_encode_init(AVCodecContext *avctx)
break;
}
switch(avctx->codec->id) {
case CODEC_ID_PCM_S16LE:
case CODEC_ID_PCM_S16BE:
case CODEC_ID_PCM_U16LE:
case CODEC_ID_PCM_U16BE:
avctx->block_align = 2 * avctx->channels;
break;
case CODEC_ID_PCM_S8:
case CODEC_ID_PCM_U8:
case CODEC_ID_PCM_MULAW:
case CODEC_ID_PCM_ALAW:
avctx->block_align = avctx->channels;
break;
default:
break;
}
avctx->coded_frame= avcodec_alloc_frame();
avctx->coded_frame->key_frame= 1;

55
libavformat/avienc.c
View File

@ -251,33 +251,24 @@ void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags
put_byte(pb, 0);
}
static void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)
static void parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
{
switch(stream->codec_id) {
case CODEC_ID_PCM_S16LE:
*au_scale = *au_ssize = 2*stream->channels;
*au_byterate = *au_ssize * stream->sample_rate;
break;
case CODEC_ID_PCM_U8:
case CODEC_ID_PCM_ALAW:
case CODEC_ID_PCM_MULAW:
*au_scale = *au_ssize = stream->channels;
*au_byterate = *au_ssize * stream->sample_rate;
break;
case CODEC_ID_MP2:
*au_ssize = 1;
*au_scale = 1;
*au_byterate = stream->bit_rate / 8;
case CODEC_ID_MP3:
*au_ssize = 1;
*au_scale = 1;
*au_byterate = stream->bit_rate / 8;
default:
*au_ssize = 1;
*au_scale = 1;
*au_byterate = stream->bit_rate / 8;
break;
int gcd;
*au_ssize= stream->block_align;
if(stream->frame_size && stream->sample_rate){
*au_scale=stream->frame_size;
*au_rate= stream->sample_rate;
}else if(stream->codec_type == CODEC_TYPE_VIDEO){
*au_scale= stream->frame_rate_base;
*au_rate = stream->frame_rate;
}else{
*au_scale= stream->block_align ? stream->block_align*8 : 8;
*au_rate = stream->bit_rate;
}
gcd= ff_gcd(*au_scale, *au_rate);
*au_scale /= gcd;
*au_rate /= gcd;
}
static offset_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb,
@ -595,18 +586,12 @@ static int avi_write_idx1(AVFormatContext *s)
if (avi->frames_hdr_strm[n] != 0) {
stream = &s->streams[n]->codec;
url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
if (stream->codec_type == CODEC_TYPE_VIDEO) {
parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
if (au_ssize == 0) {
put_le32(pb, stream->frame_number);
if (nb_frames < stream->frame_number)
nb_frames = stream->frame_number;
nb_frames += stream->frame_number;
} else {
if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
put_le32(pb, stream->frame_number);
nb_frames += stream->frame_number;
} else {
parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
put_le32(pb, avi->audio_strm_length[n] / au_ssize);
}
put_le32(pb, avi->audio_strm_length[n] / au_ssize);
}
}
}

2
libavformat/wav.c
View File

@ -71,7 +71,7 @@ int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
}
if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
blkalign = 1;
blkalign = enc->frame_size; //this is wrong, but seems many demuxers dont work if this is set correctly
//blkalign = 144 * enc->bit_rate/enc->sample_rate;
} else if (enc->block_align != 0) { /* specified by the codec */
blkalign = enc->block_align;

4
tests/libav.regression.ref
View File

@ -1,8 +1,8 @@
ffmpeg regression test
580b53ca26eb2184b928967b8e7d18a7 *./data/b-libav.avi
8517e7c83227074b8d632477fda310d5 *./data/b-libav.avi
342282 ./data/b-libav.avi
./data/b-libav.avi CRC=001a3415
80f85b6dce1da8310a49bb4607a34f06 *./data/b-libav.asf
c83444a0e8ef47b6af1d868d1bb21696 *./data/b-libav.asf
342967 ./data/b-libav.asf
./data/b-libav.asf CRC=750f18c7
1cbf838e659d7fc3d3e33f4187b91f6c *./data/b-libav.rm