[FFmpeg-cvslog] avcodec: add WADY DPCM decoder
Paul B Mahol
git at videolan.org
Tue Jan 24 17:56:33 EET 2023
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sat Jan 21 12:21:44 2023 +0100| [c5a545cff864366c22487b47a2e605a06464790e] | committer: Paul B Mahol
avcodec: add WADY DPCM decoder
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c5a545cff864366c22487b47a2e605a06464790e
---
Changelog | 1 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/codec_desc.c | 7 +++++++
libavcodec/codec_id.h | 1 +
libavcodec/dpcm.c | 45 +++++++++++++++++++++++++++++++++++++++++++--
libavcodec/utils.c | 1 +
libavcodec/version.h | 2 +-
8 files changed, 56 insertions(+), 3 deletions(-)
diff --git a/Changelog b/Changelog
index 5c01e8365e..c50ebf9951 100644
--- a/Changelog
+++ b/Changelog
@@ -29,6 +29,7 @@ version <next>:
- corr video filter
- adrc audio filter
- afdelaysrc audio filter
+- WADY DPCM decoder
version 5.1:
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 651d302442..2ad4400a81 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -774,6 +774,7 @@ OBJS-$(CONFIG_VPLAYER_DECODER) += textdec.o ass.o
OBJS-$(CONFIG_VP9_V4L2M2M_DECODER) += v4l2_m2m_dec.o
OBJS-$(CONFIG_VQA_DECODER) += vqavideo.o
OBJS-$(CONFIG_VQC_DECODER) += vqcdec.o
+OBJS-$(CONFIG_WADY_DPCM_DECODER) += dpcm.o
OBJS-$(CONFIG_WAVPACK_DECODER) += wavpack.o wavpackdata.o dsd.o
OBJS-$(CONFIG_WAVPACK_ENCODER) += wavpackdata.o wavpackenc.o
OBJS-$(CONFIG_WBMP_DECODER) += wbmpdec.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index b009848a44..46aaa89e99 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -628,6 +628,7 @@ extern const FFCodec ff_roq_dpcm_decoder;
extern const FFCodec ff_sdx2_dpcm_decoder;
extern const FFCodec ff_sol_dpcm_decoder;
extern const FFCodec ff_xan_dpcm_decoder;
+extern const FFCodec ff_wady_dpcm_decoder;
/* ADPCM codecs */
extern const FFCodec ff_adpcm_4xm_decoder;
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index 24a0433dba..2272232ed6 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -2619,6 +2619,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("DPCM Xilam DERF"),
.props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
},
+ {
+ .id = AV_CODEC_ID_WADY_DPCM,
+ .type = AVMEDIA_TYPE_AUDIO,
+ .name = "wady_dpcm",
+ .long_name = NULL_IF_CONFIG_SMALL("DPCM Marble WADY"),
+ .props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY,
+ },
/* audio codecs */
{
diff --git a/libavcodec/codec_id.h b/libavcodec/codec_id.h
index f436a2b624..5ec3fd4b30 100644
--- a/libavcodec/codec_id.h
+++ b/libavcodec/codec_id.h
@@ -430,6 +430,7 @@ enum AVCodecID {
AV_CODEC_ID_SDX2_DPCM,
AV_CODEC_ID_GREMLIN_DPCM,
AV_CODEC_ID_DERF_DPCM,
+ AV_CODEC_ID_WADY_DPCM,
/* audio codecs */
AV_CODEC_ID_MP2 = 0x15000,
diff --git a/libavcodec/dpcm.c b/libavcodec/dpcm.c
index 2425f84eb9..2420647bc0 100644
--- a/libavcodec/dpcm.c
+++ b/libavcodec/dpcm.c
@@ -45,7 +45,8 @@
typedef struct DPCMContext {
int16_t array[256];
- int sample[2]; ///< previous sample (for SOL_DPCM)
+ int sample[2]; ///< previous sample (for SOL_DPCM and WADY_DPCM)
+ int scale; ///< scale for WADY_DPCM
const int8_t *sol_table; ///< delta table for SOL_DPCM
} DPCMContext;
@@ -126,6 +127,24 @@ static const int16_t sol_table_16[128] = {
0xF00, 0x1000, 0x1400, 0x1800, 0x1C00, 0x2000, 0x3000, 0x4000
};
+static const int16_t wady_table[128] = {
+ 0, 2, 4, 6, 8, 10, 12, 15,
+ 18, 21, 24, 28, 32, 36, 40, 44,
+ 49, 54, 59, 64, 70, 76, 82, 88,
+ 95, 102, 109, 116, 124, 132, 140, 148,
+ 160, 170, 180, 190, 200, 210, 220, 230,
+ 240, 255, 270, 285, 300, 320, 340, 360,
+ 380, 400, 425, 450, 475, 500, 525, 550,
+ 580, 610, 650, 700, 750, 800, 900, 1000,
+ -0, -2, -4, -6, -8, -10, -12, -15,
+ -18, -21, -24, -28, -32, -36, -40, -44,
+ -49, -54, -59, -64, -70, -76, -82, -88,
+ -95, -102,-109,-116,-124,-132,-140,-148,
+ -160,-170,-180,-190,-200,-210,-220,-230,
+ -240,-255,-270,-285,-300,-320,-340,-360,
+ -380,-400,-425,-450,-475,-500,-525,-550,
+ -580,-610,-650,-700,-750,-800,-900,-1000,
+};
static av_cold int dpcm_decode_init(AVCodecContext *avctx)
{
@@ -139,7 +158,7 @@ static av_cold int dpcm_decode_init(AVCodecContext *avctx)
s->sample[0] = s->sample[1] = 0;
- switch(avctx->codec->id) {
+ switch (avctx->codec->id) {
case AV_CODEC_ID_ROQ_DPCM:
/* initialize square table */
@@ -193,6 +212,10 @@ static av_cold int dpcm_decode_init(AVCodecContext *avctx)
}
break;
+ case AV_CODEC_ID_WADY_DPCM:
+ s->scale = (avctx->extradata && avctx->extradata_size > 0) ? avctx->extradata[0] : 1;
+ break;
+
default:
break;
}
@@ -239,6 +262,7 @@ static int dpcm_decode_frame(AVCodecContext *avctx, AVFrame *frame,
else
out = buf_size;
break;
+ case AV_CODEC_ID_WADY_DPCM:
case AV_CODEC_ID_DERF_DPCM:
case AV_CODEC_ID_GREMLIN_DPCM:
case AV_CODEC_ID_SDX2_DPCM:
@@ -401,6 +425,22 @@ static int dpcm_decode_frame(AVCodecContext *avctx, AVFrame *frame,
}
}
break;
+
+ case AV_CODEC_ID_WADY_DPCM: {
+ int idx = 0;
+
+ while (output_samples < samples_end) {
+ const uint8_t n = bytestream2_get_byteu(&gb);
+
+ if (n & 0x80)
+ s->sample[idx] = sign_extend((n & 0x7f) << 9, 16);
+ else
+ s->sample[idx] += s->scale * wady_table[n & 0x7f];
+ *output_samples++ = av_clip_int16(s->sample[idx]);
+ idx ^= stereo;
+ }
+ }
+ break;
}
*got_frame_ptr = 1;
@@ -427,3 +467,4 @@ DPCM_DECODER(AV_CODEC_ID_ROQ_DPCM, roq_dpcm, "DPCM id RoQ");
DPCM_DECODER(AV_CODEC_ID_SDX2_DPCM, sdx2_dpcm, "DPCM Squareroot-Delta-Exact");
DPCM_DECODER(AV_CODEC_ID_SOL_DPCM, sol_dpcm, "DPCM Sol");
DPCM_DECODER(AV_CODEC_ID_XAN_DPCM, xan_dpcm, "DPCM Xan");
+DPCM_DECODER(AV_CODEC_ID_WADY_DPCM, wady_dpcm, "DPCM Marble WADY");
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 2b63a498b9..27ab92c9ce 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -515,6 +515,7 @@ int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
case AV_CODEC_ID_PCM_U8:
case AV_CODEC_ID_SDX2_DPCM:
case AV_CODEC_ID_DERF_DPCM:
+ case AV_CODEC_ID_WADY_DPCM:
return 8;
case AV_CODEC_ID_PCM_S16BE:
case AV_CODEC_ID_PCM_S16BE_PLANAR:
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 6b8a1dbb79..dfd3d5d7e5 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
#include "version_major.h"
-#define LIBAVCODEC_VERSION_MINOR 56
+#define LIBAVCODEC_VERSION_MINOR 57
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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