diff options
| author | Cameron Cawley <ccawley2011@gmail.com> | 2021-05-07 17:50:47 +0100 |
|---|---|---|
| committer | Zane van Iperen <zane@zanevaniperen.com> | 2021-05-09 17:01:27 +1000 |
| commit | 5c7313c740dbd04e1a98937ca31d2c4a30ac6b99 (patch) | |
| tree | 2ddcee2da131f70edbc02aa7db730f53f7a14c70 /libavcodec/adpcm.c | |
| parent | b4e7fc4b4b4aa71ae6806b57ebe1293239497f71 (diff) | |
avcodec: Implement Acorn Replay IMA ADPCM decoder
Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
Diffstat (limited to 'libavcodec/adpcm.c')
| -rw-r--r-- | libavcodec/adpcm.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index 3da6b734cf..8fe43b5720 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -747,6 +747,7 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb, switch (avctx->codec->id) { case AV_CODEC_ID_ADPCM_4XM: case AV_CODEC_ID_ADPCM_AGM: + case AV_CODEC_ID_ADPCM_IMA_ACORN: 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; @@ -1665,6 +1666,23 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data, } } break; + case AV_CODEC_ID_ADPCM_IMA_ACORN: + for (channel = 0; channel < avctx->channels; channel++) { + cs = &c->status[channel]; + cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16); + cs->step_index = bytestream2_get_le16u(&gb) & 0xFF; + 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 (n = nb_samples >> (1 - st); n > 0; n--) { + int byte = bytestream2_get_byteu(&gb); + *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte & 0x0F, 3); + *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte >> 4, 3); + } + break; case AV_CODEC_ID_ADPCM_IMA_AMV: av_assert0(avctx->channels == 1); @@ -2160,6 +2178,7 @@ ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS"); +ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ACORN, sample_fmts_s16, adpcm_ima_acorn, "ADPCM IMA Acorn Replay"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC"); ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APM, sample_fmts_s16, adpcm_ima_apm, "ADPCM IMA Ubisoft APM"); |