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riff: make the G723.1 in wav output compatible with WMP/msacm codec 

Attached patch (together with demuxing patch) allows WMP/msacm G723.1 codec decode files encoded by FFmpeg.

Tested with both 6400 and 5333 mode

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Piotr Bandurski 2012-07-24 11:42:55 +02:00 committed by Michael Niedermayer
parent e2fd18d40d
commit 23bb85b069
1 changed files with 9 additions and 0 deletions
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9
libavformat/riff.c
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@ -482,6 +482,8 @@ int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
//blkalign = 144 * enc->bit_rate/enc->sample_rate;
} else if (enc->codec_id == CODEC_ID_AC3) {
blkalign = 3840; //maximum bytes per frame
} else if (enc->codec_id == CODEC_ID_G723_1) {
blkalign = 24;
} else if (enc->block_align != 0) { /* specified by the codec */
blkalign = enc->block_align;
} else
@ -493,6 +495,8 @@ int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
enc->codec_id == CODEC_ID_PCM_F64LE ||
enc->codec_id == CODEC_ID_PCM_S16LE) {
bytespersec = enc->sample_rate * blkalign;
} else if (enc->codec_id == CODEC_ID_G723_1) {
bytespersec = 800;
} else {
bytespersec = enc->bit_rate / 8;
}
@ -516,6 +520,11 @@ int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
bytestream_put_le16(&riff_extradata, 16); /* fwHeadFlags */
bytestream_put_le32(&riff_extradata, 0); /* dwPTSLow */
bytestream_put_le32(&riff_extradata, 0); /* dwPTSHigh */
} else if (enc->codec_id == CODEC_ID_G723_1) {
hdrsize += 20;
bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */
bytestream_put_le32(&riff_extradata, 0xaea2f732);
bytestream_put_le16(&riff_extradata, 0xacde);
} else if (enc->codec_id == CODEC_ID_GSM_MS || enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
hdrsize += 2;
bytestream_put_le16(&riff_extradata, frame_size); /* wSamplesPerBlock */