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| author | Vitor Sessak <vitor1001@gmail.com> | 2007-09-27 06:21:57 +0000 |
|---|---|---|
| committer | Vitor Sessak <vitor1001@gmail.com> | 2007-09-27 06:21:57 +0000 |
| commit | 3a7f5d072a7786c841d7c357c3ed97173736752f (patch) | |
| tree | 87d743bd69b8cad955703972f5751e7a8e08109b /libavcodec/adpcm.c | |
| parent | 815d96a65d078a8c9a629eb1f38ebf7a04d88063 (diff) | |
| download | ffmpeg-3a7f5d072a7786c841d7c357c3ed97173736752f.tar.gz | |
AMV audio decoder
Originally committed as revision 10598 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/adpcm.c')
| -rw-r--r-- | libavcodec/adpcm.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index 2329f9af89..0d1e0ecd55 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -1182,16 +1182,28 @@ static int adpcm_decode_frame(AVCodecContext *avctx, } } break; + case CODEC_ID_ADPCM_IMA_AMV: case CODEC_ID_ADPCM_IMA_SMJPEG: c->status[0].predictor = *src; src += 2; c->status[0].step_index = *src++; src++; /* skip another byte before getting to the meat */ + + if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV) + src+=4; + while (src < buf + buf_size) { + char hi, lo; + lo = *src & 0x0F; + hi = (*src >> 4) & 0x0F; + + if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV) + FFSWAP(char, hi, lo); + *samples++ = adpcm_ima_expand_nibble(&c->status[0], - *src & 0x0F, 3); + lo, 3); *samples++ = adpcm_ima_expand_nibble(&c->status[0], - (*src >> 4) & 0x0F, 3); + hi, 3); src++; } break; @@ -1439,6 +1451,7 @@ ADPCM_ENCODER(id,name) ADPCM_DECODER(id,name) ADPCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm); ADPCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct); ADPCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea); +ADPCM_CODEC(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv); ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3); ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4); ADPCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt); |