[FFmpeg-devel] [PATCH v2 1/2] avcodec: add support for Cunning Developments' ADPCM
Zane van Iperen
zane at zanevaniperen.com
Wed Mar 18 16:12:25 EET 2020
Signed-off-by: Zane van Iperen <zane at zanevaniperen.com>
---
Changelog | 1 +
doc/general.texi | 1 +
libavcodec/Makefile | 1 +
libavcodec/adpcm.c | 33 +++++++++++++++++++++++++++++++++
libavcodec/adpcm_data.c | 13 +++++++++++++
libavcodec/adpcm_data.h | 2 ++
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/codec_desc.c | 7 +++++++
libavcodec/version.h | 2 +-
10 files changed, 61 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index 711861bda9..927dc89c51 100644
--- a/Changelog
+++ b/Changelog
@@ -54,6 +54,7 @@ version <next>:
- DERF demuxer
- CRI HCA decoder
- CRI HCA demuxer
+- Cunning Developments ADPCM decoder
version 4.2:
diff --git a/doc/general.texi b/doc/general.texi
index 14878f4dcf..c149a4841e 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -1099,6 +1099,7 @@ following image formats are supported:
@item ADPCM G.726 @tab X @tab X
@item ADPCM IMA AMV @tab @tab X
@tab Used in AMV files
+ at item ADPCM IMA Cunning Developments @tab @tab X
@item ADPCM IMA Electronic Arts EACS @tab @tab X
@item ADPCM IMA Electronic Arts SEAD @tab @tab X
@item ADPCM IMA Funcom @tab @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index c1c9a44f2b..e799077f09 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -839,6 +839,7 @@ OBJS-$(CONFIG_ADPCM_IMA_AMV_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_ALP_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_APC_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_APM_DECODER) += adpcm.o adpcm_data.o
+OBJS-$(CONFIG_ADPCM_IMA_CUNNING_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_DAT4_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_DK3_DECODER) += adpcm.o adpcm_data.o
OBJS-$(CONFIG_ADPCM_IMA_DK4_DECODER) += adpcm.o adpcm_data.o
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index e9abddc43c..89c4572538 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -16,6 +16,7 @@
* Simon & Schuster Interactive ADPCM decoder by Zane van Iperen (zane at zanevaniperen.com)
* Ubisoft ADPCM decoder by Zane van Iperen (zane at zanevaniperen.com)
* High Voltage Software ALP decoder by Zane van Iperen (zane at zanevaniperen.com)
+ * Cunning Developments decoder by Zane van Iperen (zane at zanevaniperen.com)
*
* This file is part of FFmpeg.
*
@@ -109,6 +110,9 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
unsigned int max_channels = 2;
switch(avctx->codec->id) {
+ case AV_CODEC_ID_ADPCM_IMA_CUNNING:
+ max_channels = 1;
+ break;
case AV_CODEC_ID_ADPCM_DTK:
case AV_CODEC_ID_ADPCM_EA:
min_channels = 2;
@@ -325,6 +329,26 @@ static inline int16_t adpcm_ima_mtf_expand_nibble(ADPCMChannelStatus *c, int nib
return (int16_t)c->predictor;
}
+static inline int16_t adpcm_ima_cunning_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
+{
+ int step_index;
+ int predictor;
+ int step;
+
+ nibble = sign_extend(nibble & 0xF, 4);
+
+ step = ff_adpcm_ima_cunning_step_table[c->step_index];
+ step_index = c->step_index + ff_adpcm_ima_cunning_index_table[abs(nibble)];
+ step_index = av_clip(step_index, 0, 60);
+
+ predictor = c->predictor + (step * nibble);
+
+ c->predictor = av_clip_int16(predictor);
+ c->step_index = step_index;
+
+ return (int16_t)c->predictor;
+}
+
static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
{
int nibble, step_index, predictor, sign, delta, diff, step, shift;
@@ -713,6 +737,7 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
/* simple 4-bit adpcm */
case AV_CODEC_ID_ADPCM_CT:
case AV_CODEC_ID_ADPCM_IMA_APC:
+ case AV_CODEC_ID_ADPCM_IMA_CUNNING:
case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
case AV_CODEC_ID_ADPCM_IMA_OKI:
case AV_CODEC_ID_ADPCM_IMA_WS:
@@ -1304,6 +1329,13 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
samples += avctx->channels;
}
break;
+ case AV_CODEC_ID_ADPCM_IMA_CUNNING:
+ while (bytestream2_get_bytes_left(&gb) > 0) {
+ int v = bytestream2_get_byteu(&gb);
+ *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v & 0x0F);
+ *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v >> 4);
+ }
+ break;
case AV_CODEC_ID_ADPCM_IMA_OKI:
while (bytestream2_get_bytes_left(&gb) > 0) {
int v = bytestream2_get_byteu(&gb);
@@ -2053,6 +2085,7 @@ ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas,
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");
+ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_CUNNING, sample_fmts_s16, adpcm_ima_cunning, "ADPCM IMA Cunning Developments");
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DAT4, sample_fmts_s16, adpcm_ima_dat4, "ADPCM IMA Eurocom DAT4");
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
diff --git a/libavcodec/adpcm_data.c b/libavcodec/adpcm_data.c
index 4cce0a5857..a1f6966c75 100644
--- a/libavcodec/adpcm_data.c
+++ b/libavcodec/adpcm_data.c
@@ -177,3 +177,16 @@ const int16_t ff_adpcm_mtaf_stepsize[32][16] = {
{ 424, 1273, 2121, 2970, 3819, 4668, 5516, 6365,
-424, -1273, -2121, -2970, -3819, -4668, -5516, -6365, },
};
+
+const int16_t ff_adpcm_ima_cunning_index_table[8] = {
+ -1, -1, -1, -1, 1, 2, 3, 4,
+};
+
+const int16_t ff_adpcm_ima_cunning_step_table[61] = {
+ 1, 1, 1, 1, 2, 2, 3, 3, 4, 5,
+ 6, 7, 8, 10, 12, 14, 16, 20, 24, 28,
+ 32, 40, 48, 56, 64, 80, 96, 112, 128, 160,
+ 192, 224, 256, 320, 384, 448, 512, 640, 768, 896,
+ 1024, 1280, 1536, 1792, 2048, 2560, 3072, 3584, 4096, 5120,
+ 6144, 7168, 8192, 10240, 12288, 14336, 16384, 20480, 24576, 28672, 0
+};
diff --git a/libavcodec/adpcm_data.h b/libavcodec/adpcm_data.h
index 5a687131d8..2b32b05435 100644
--- a/libavcodec/adpcm_data.h
+++ b/libavcodec/adpcm_data.h
@@ -42,5 +42,7 @@ extern const int16_t ff_adpcm_yamaha_indexscale[];
extern const int8_t ff_adpcm_yamaha_difflookup[];
extern const int16_t ff_adpcm_afc_coeffs[2][16];
extern const int16_t ff_adpcm_mtaf_stepsize[32][16];
+extern const int16_t ff_adpcm_ima_cunning_index_table[8];
+extern const int16_t ff_adpcm_ima_cunning_step_table[61];
#endif /* AVCODEC_ADPCM_DATA_H */
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index b3184af954..8c5da63a82 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -604,6 +604,7 @@ extern AVCodec ff_adpcm_ima_amv_decoder;
extern AVCodec ff_adpcm_ima_alp_decoder;
extern AVCodec ff_adpcm_ima_apc_decoder;
extern AVCodec ff_adpcm_ima_apm_decoder;
+extern AVCodec ff_adpcm_ima_cunning_decoder;
extern AVCodec ff_adpcm_ima_dat4_decoder;
extern AVCodec ff_adpcm_ima_dk3_decoder;
extern AVCodec ff_adpcm_ima_dk4_decoder;
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 78c483c25c..d78bf4b67c 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -554,6 +554,7 @@ enum AVCodecID {
AV_CODEC_ID_ADPCM_IMA_APM,
AV_CODEC_ID_ADPCM_IMA_ALP,
AV_CODEC_ID_ADPCM_IMA_MTF,
+ AV_CODEC_ID_ADPCM_IMA_CUNNING,
/* AMR */
AV_CODEC_ID_AMR_NB = 0x12000,
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index ece6eadae4..68151d4af9 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -2339,6 +2339,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("ADPCM IMA Capcom's MT Framework"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
},
+ {
+ .id = AV_CODEC_ID_ADPCM_IMA_CUNNING,
+ .type = AVMEDIA_TYPE_AUDIO,
+ .name = "adpcm_ima_cunning",
+ .long_name = NULL_IF_CONFIG_SMALL("ADPCM IMA Cunning Developments"),
+ .props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
+ },
/* AMR */
{
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 1f19b67adc..7e01d9526f 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,7 +28,7 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 58
-#define LIBAVCODEC_VERSION_MINOR 76
+#define LIBAVCODEC_VERSION_MINOR 77
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
--
2.17.1
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