diff options
Diffstat (limited to 'libavcodec/adpcm.c')
| -rw-r--r-- | libavcodec/adpcm.c | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index eadcfaedd3..4e5c54e872 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -165,6 +165,10 @@ static int adpcm_encode_init(AVCodecContext *avctx) avctx->block_align = BLKSIZE; /* seems frame_size isn't taken into account... have to buffer the samples :-( */ break; + case CODEC_ID_ADPCM_IMA_QT: + avctx->frame_size = 64; + avctx->block_align = 34 * avctx->channels; + break; case CODEC_ID_ADPCM_MS: avctx->frame_size = (BLKSIZE - 7 * avctx->channels) * 2 / avctx->channels + 2; /* each 16 bits sample gives one nibble */ /* and we have 7 bytes per channel overhead */ @@ -295,7 +299,7 @@ static void adpcm_compress_trellis(AVCodecContext *avctx, const short *samples, nodes[0]->step = c->step_index; nodes[0]->sample1 = c->sample1; nodes[0]->sample2 = c->sample2; - if((version == CODEC_ID_ADPCM_IMA_WAV) || (version == CODEC_ID_ADPCM_SWF)) + if((version == CODEC_ID_ADPCM_IMA_WAV) || (version == CODEC_ID_ADPCM_IMA_QT) || (version == CODEC_ID_ADPCM_SWF)) nodes[0]->sample1 = c->prev_sample; if(version == CODEC_ID_ADPCM_MS) nodes[0]->step = c->idelta; @@ -366,7 +370,7 @@ static void adpcm_compress_trellis(AVCodecContext *avctx, const short *samples, next_##NAME:; STORE_NODE(ms, FFMAX(16, (AdaptationTable[nibble] * step) >> 8)); } - } else if((version == CODEC_ID_ADPCM_IMA_WAV)|| (version == CODEC_ID_ADPCM_SWF)) { + } else if((version == CODEC_ID_ADPCM_IMA_WAV)|| (version == CODEC_ID_ADPCM_IMA_QT)|| (version == CODEC_ID_ADPCM_SWF)) { #define LOOP_NODES(NAME, STEP_TABLE, STEP_INDEX)\ const int predictor = nodes[j]->sample1;\ const int div = (sample - predictor) * 4 / STEP_TABLE;\ @@ -509,6 +513,36 @@ static int adpcm_encode_frame(AVCodecContext *avctx, samples += 8 * avctx->channels; } break; + case CODEC_ID_ADPCM_IMA_QT: + { + int ch, i; + PutBitContext pb; + init_put_bits(&pb, dst, buf_size*8); + + for(ch=0; ch<avctx->channels; ch++){ + put_bits(&pb, 9, (c->status[ch].prev_sample + 0x10000) >> 7); + put_bits(&pb, 7, c->status[ch].step_index); + if(avctx->trellis > 0) { + uint8_t buf[64]; + adpcm_compress_trellis(avctx, samples+ch, buf, &c->status[ch], 64); + for(i=0; i<64; i++) + put_bits(&pb, 4, buf[i^1]); + c->status[ch].prev_sample = c->status[ch].predictor & ~0x7F; + } else { + for (i=0; i<64; i+=2){ + int t1, t2; + t1 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+0)+ch]); + t2 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+1)+ch]); + put_bits(&pb, 4, t2); + put_bits(&pb, 4, t1); + } + c->status[ch].prev_sample &= ~0x7F; + } + } + + dst += put_bits_count(&pb)>>3; + break; + } case CODEC_ID_ADPCM_SWF: { int i; @@ -1588,7 +1622,7 @@ ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3); ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4); ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs); ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead); -ADPCM_DECODER(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt); +ADPCM_CODEC (CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt); ADPCM_DECODER(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg); ADPCM_CODEC (CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav); ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws); |