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avcodec: add decoder for argonaut games' adpcm codec
Adds support for the ADPCM variant used by some Argonaut Games' games, such as 'Croc! Legend of the Gobbos', and 'Croc 2'. Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
This commit is contained in:
Zane van Iperen
Paul B Mahol
parent
15d160cc0b
commit
bf890ae0d7
@ -30,6 +30,7 @@ version <next>:
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- MPEG-H 3D Audio support in mp4
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- thistogram filter
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- freezeframes filter
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- Argonaut Games ADPCM decoder
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version 4.2:
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@ -1079,6 +1079,7 @@ following image formats are supported:
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@item ACELP.KELVIN @tab @tab X
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@item ADPCM 4X Movie @tab @tab X
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@item APDCM Yamaha AICA @tab @tab X
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@item ADPCM Argonaut Games @tab @tab X
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@item ADPCM CDROM XA @tab @tab X
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@item ADPCM Creative Technology @tab @tab X
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@tab 16 -> 4, 8 -> 4, 8 -> 3, 8 -> 2
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@ -817,6 +817,7 @@ OBJS-$(CONFIG_ADPCM_ADX_ENCODER) += adxenc.o adx.o
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OBJS-$(CONFIG_ADPCM_AFC_DECODER) += adpcm.o adpcm_data.o
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OBJS-$(CONFIG_ADPCM_AGM_DECODER) += adpcm.o adpcm_data.o
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OBJS-$(CONFIG_ADPCM_AICA_DECODER) += adpcm.o adpcm_data.o
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OBJS-$(CONFIG_ADPCM_ARGO_DECODER) += adpcm.o adpcm_data.o
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OBJS-$(CONFIG_ADPCM_CT_DECODER) += adpcm.o adpcm_data.o
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OBJS-$(CONFIG_ADPCM_DTK_DECODER) += adpcm.o adpcm_data.o
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OBJS-$(CONFIG_ADPCM_EA_DECODER) += adpcm.o adpcm_data.o
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@ -12,6 +12,7 @@
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* EA ADPCM XAS decoder by Peter Ross (pross@xvid.org)
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* MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com)
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* THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
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* Argonaut Games ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
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*
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* This file is part of FFmpeg.
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*
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@ -148,6 +149,10 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
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if (avctx->extradata && avctx->extradata_size >= 2)
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c->vqa_version = AV_RL16(avctx->extradata);
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break;
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case AV_CODEC_ID_ADPCM_ARGO:
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if (avctx->bits_per_coded_sample != 4)
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return AVERROR_INVALIDDATA;
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break;
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default:
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break;
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}
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@ -169,6 +174,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
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case AV_CODEC_ID_ADPCM_DTK:
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case AV_CODEC_ID_ADPCM_PSX:
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case AV_CODEC_ID_ADPCM_MTAF:
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case AV_CODEC_ID_ADPCM_ARGO:
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avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
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break;
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case AV_CODEC_ID_ADPCM_IMA_WS:
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@ -546,6 +552,11 @@ static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_
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}
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}
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static inline int16_t adpcm_argo_expand_nibble(int nibble, int shift, int16_t prev0, int16_t prev1)
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{
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return ((8 * prev0) - (4 * prev1) + (nibble * (1 << shift))) >> 2;
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}
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/**
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* Get the number of samples that will be decoded from the packet.
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* In one case, this is actually the maximum number of samples possible to
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@ -584,6 +595,11 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
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return 0;
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nb_samples = 64;
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break;
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case AV_CODEC_ID_ADPCM_ARGO:
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if (buf_size < 17 * ch)
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return 0;
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nb_samples = 32;
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break;
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/* simple 4-bit adpcm */
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case AV_CODEC_ID_ADPCM_CT:
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case AV_CODEC_ID_ADPCM_IMA_APC:
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@ -1770,7 +1786,57 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
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}
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}
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break;
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case AV_CODEC_ID_ADPCM_ARGO:
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/*
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* The format of each block:
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* uint8_t left_control;
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* uint4_t left_samples[nb_samples];
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* ---- and if stereo ----
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* uint8_t right_control;
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* uint4_t right_samples[nb_samples];
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*
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* Format of the control byte:
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* MSB [SSSSDRRR] LSB
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* S = (Shift Amount - 2)
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* D = Decoder flag.
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* R = Reserved
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*
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* Each block relies on the previous two samples of each channel.
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* They should be 0 initially.
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*/
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for (channel = 0; channel < avctx->channels; channel++) {
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int control, shift, sample, nibble;
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samples = samples_p[channel];
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cs = c->status + channel;
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/* Get the control byte and decode the samples, 2 at a time. */
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control = bytestream2_get_byteu(&gb);
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shift = (control >> 4) + 2;
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for (n = 0; n < nb_samples / 2; n++) {
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sample = bytestream2_get_byteu(&gb);
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nibble = sign_extend(sample >> 4, 4);
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if (control & 0x04)
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*samples = adpcm_argo_expand_nibble(nibble, shift, cs->sample1, cs->sample2);
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else
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*samples = adpcm_argo_expand_nibble(nibble, shift, cs->sample1, cs->sample1);
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cs->sample2 = cs->sample1;
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cs->sample1 = *samples++;
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nibble = sign_extend(sample >> 0, 4);
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if (control & 0x04)
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*samples = adpcm_argo_expand_nibble(nibble, shift, cs->sample1, cs->sample2);
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else
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*samples = adpcm_argo_expand_nibble(nibble, shift, cs->sample1, cs->sample1);
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cs->sample2 = cs->sample1;
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cs->sample1 = *samples++;
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}
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}
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break;
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default:
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av_assert0(0); // unsupported codec_id should not happen
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}
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@ -1824,6 +1890,7 @@ ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm,
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ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
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ADPCM_DECODER(AV_CODEC_ID_ADPCM_AGM, sample_fmts_s16, adpcm_agm, "ADPCM AmuseGraphics Movie");
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ADPCM_DECODER(AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA");
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ADPCM_DECODER(AV_CODEC_ID_ADPCM_ARGO, sample_fmts_s16p, adpcm_argo, "ADPCM Argonaut Games");
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ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
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ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
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ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
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@ -582,6 +582,7 @@ extern AVCodec ff_adpcm_adx_decoder;
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extern AVCodec ff_adpcm_afc_decoder;
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extern AVCodec ff_adpcm_agm_decoder;
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extern AVCodec ff_adpcm_aica_decoder;
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extern AVCodec ff_adpcm_argo_decoder;
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extern AVCodec ff_adpcm_ct_decoder;
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extern AVCodec ff_adpcm_dtk_decoder;
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extern AVCodec ff_adpcm_ea_decoder;
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@ -545,6 +545,7 @@ enum AVCodecID {
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AV_CODEC_ID_ADPCM_IMA_DAT4,
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AV_CODEC_ID_ADPCM_MTAF,
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AV_CODEC_ID_ADPCM_AGM,
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AV_CODEC_ID_ADPCM_ARGO,
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/* AMR */
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AV_CODEC_ID_AMR_NB = 0x12000,
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@ -2297,6 +2297,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
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.long_name = NULL_IF_CONFIG_SMALL("ADPCM AmuseGraphics Movie AGM"),
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.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
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},
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{
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.id = AV_CODEC_ID_ADPCM_ARGO,
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.type = AVMEDIA_TYPE_AUDIO,
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.name = "adpcm_argo",
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.long_name = NULL_IF_CONFIG_SMALL("ADPCM Argonaut Games"),
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.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
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},
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/* AMR */
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{
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@ -28,8 +28,8 @@
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#include "libavutil/version.h"
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#define LIBAVCODEC_VERSION_MAJOR 58
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#define LIBAVCODEC_VERSION_MINOR 66
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#define LIBAVCODEC_VERSION_MICRO 101
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#define LIBAVCODEC_VERSION_MINOR 67
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#define LIBAVCODEC_VERSION_MICRO 100
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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LIBAVCODEC_VERSION_MINOR, \
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