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| author | Paul B Mahol <onemda@gmail.com> | 2020-08-25 00:51:11 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2020-09-03 18:06:50 +0200 |
| commit | a1caa16d45b321e669efdcce67f4027e532c90d1 (patch) | |
| tree | 1b95a97827e3d72b59eea13bcdfbbb2562d52b5a /libavcodec/adpcm.c | |
| parent | 2d16b6bd3e18f31dbd53f10e337d13ddb4ba6ba0 (diff) | |
| download | ffmpeg-a1caa16d45b321e669efdcce67f4027e532c90d1.tar.gz | |
avcodec: add ADPCM IMA MOFLEX decoder
Diffstat (limited to 'libavcodec/adpcm.c')
| -rw-r--r-- | libavcodec/adpcm.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index 1366932352..71e37efde7 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -210,6 +210,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx) case AV_CODEC_ID_ADPCM_PSX: case AV_CODEC_ID_ADPCM_MTAF: case AV_CODEC_ID_ADPCM_ARGO: + case AV_CODEC_ID_ADPCM_IMA_MOFLEX: avctx->sample_fmt = AV_SAMPLE_FMT_S16P; break; case AV_CODEC_ID_ADPCM_IMA_WS: @@ -774,6 +775,7 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb, case AV_CODEC_ID_ADPCM_4XM: case AV_CODEC_ID_ADPCM_AGM: case AV_CODEC_ID_ADPCM_IMA_DAT4: + case AV_CODEC_ID_ADPCM_IMA_MOFLEX: case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break; case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break; case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break; @@ -1298,6 +1300,29 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data, *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3); } break; + case AV_CODEC_ID_ADPCM_IMA_MOFLEX: + for (channel = 0; channel < avctx->channels; channel++) { + cs = &c->status[channel]; + cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16); + cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16); + if (cs->step_index > 88u){ + av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", + channel, cs->step_index); + return AVERROR_INVALIDDATA; + } + } + + for (int subframe = 0; subframe < nb_samples / 256; subframe++) { + for (channel = 0; channel < avctx->channels; channel++) { + samples = samples_p[channel] + 256 * subframe; + for (n = 0; n < 256; n += 2) { + int v = bytestream2_get_byteu(&gb); + *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3); + *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3); + } + } + } + break; case AV_CODEC_ID_ADPCM_IMA_DAT4: for (channel = 0; channel < avctx->channels; channel++) { cs = &c->status[channel]; @@ -2107,6 +2132,7 @@ ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS"); +ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MOFLEX, sample_fmts_s16p, adpcm_ima_moflex, "ADPCM IMA MobiClip MOFLEX"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MTF, sample_fmts_s16, adpcm_ima_mtf, "ADPCM IMA Capcom's MT Framework"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime"); |