avcodec: add adpcm dat4 decoder

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Changelog

@@ -18,6 +18,7 @@ version <next>:
 - coreimage filter (GPU based image filtering on OSX)
 - libdcadec removed
 - bitstream filter for extracting DTS core
+- ADPCM IMA DAT4 decoder
 
 version 3.0:
 - Common Encryption (CENC) MP4 encoding and decoding support

libavcodec/Makefile

@@ -695,6 +695,7 @@ OBJS-$(CONFIG_ADPCM_G726_ENCODER)         += g726.o
 OBJS-$(CONFIG_ADPCM_G726LE_DECODER)       += g726.o
 OBJS-$(CONFIG_ADPCM_IMA_AMV_DECODER)      += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_IMA_APC_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-$(CONFIG_ADPCM_IMA_DK4_DECODER)      += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_IMA_EA_EACS_DECODER)  += adpcm.o adpcm_data.o

libavcodec/adpcm.c

@@ -110,6 +110,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
     case AV_CODEC_ID_ADPCM_PSX:
         max_channels = 8;
         break;
+    case AV_CODEC_ID_ADPCM_IMA_DAT4:
     case AV_CODEC_ID_ADPCM_THP:
     case AV_CODEC_ID_ADPCM_THP_LE:
         max_channels = 14;
@@ -144,6 +145,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
 
     switch(avctx->codec->id) {
         case AV_CODEC_ID_ADPCM_AICA:
+        case AV_CODEC_ID_ADPCM_IMA_DAT4:
         case AV_CODEC_ID_ADPCM_IMA_QT:
         case AV_CODEC_ID_ADPCM_IMA_WAV:
         case AV_CODEC_ID_ADPCM_4XM:
@@ -533,6 +535,7 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
     header_size = 0;
     switch (avctx->codec->id) {
         case AV_CODEC_ID_ADPCM_4XM:
+        case AV_CODEC_ID_ADPCM_IMA_DAT4:
         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;
@@ -984,6 +987,18 @@ 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_DAT4:
+        for (channel = 0; channel < avctx->channels; channel++) {
+            cs = &c->status[channel];
+            samples = samples_p[channel];
+            bytestream2_skip(&gb, 4);
+            for (n = 0; n < nb_samples; n += 2) {
+                int v = bytestream2_get_byteu(&gb);
+                *samples++ = adpcm_ima_expand_nibble(cs, v >> 4  , 3);
+                *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
+            }
+        }
+        break;
     case AV_CODEC_ID_ADPCM_IMA_APC:
         while (bytestream2_get_bytes_left(&gb) > 0) {
             int v = bytestream2_get_byteu(&gb);
@@ -1670,6 +1685,7 @@ ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3,       sample_fmts_s16p, adpcm_ea_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_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_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");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16,  adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");

libavcodec/allcodecs.c

@@ -515,6 +515,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(ADPCM_G726LE,      adpcm_g726le);
     REGISTER_DECODER(ADPCM_IMA_AMV,     adpcm_ima_amv);
     REGISTER_DECODER(ADPCM_IMA_APC,     adpcm_ima_apc);
+    REGISTER_DECODER(ADPCM_IMA_DAT4,    adpcm_ima_dat4);
     REGISTER_DECODER(ADPCM_IMA_DK3,     adpcm_ima_dk3);
     REGISTER_DECODER(ADPCM_IMA_DK4,     adpcm_ima_dk4);
     REGISTER_DECODER(ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs);

libavcodec/avcodec.h

@@ -397,6 +397,7 @@ enum AVCodecID {
     AV_CODEC_ID_ADPCM_THP_LE,
     AV_CODEC_ID_ADPCM_PSX,
     AV_CODEC_ID_ADPCM_AICA,
+    AV_CODEC_ID_ADPCM_IMA_DAT4,
 
     /* AMR */
     AV_CODEC_ID_AMR_NB = 0x12000,

libavcodec/codec_desc.c

@@ -2022,6 +2022,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("ADPCM Yamaha AICA"),
         .props     = AV_CODEC_PROP_LOSSY,
     },
+    {
+        .id        = AV_CODEC_ID_ADPCM_IMA_DAT4,
+        .type      = AVMEDIA_TYPE_AUDIO,
+        .name      = "adpcm_ima_dat4",
+        .long_name = NULL_IF_CONFIG_SMALL("ADPCM IMA Eurocom DAT4"),
+        .props     = AV_CODEC_PROP_LOSSY,
+    },
 
     /* AMR */
     {

libavcodec/utils.c

@@ -3239,6 +3239,7 @@ static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
             case AV_CODEC_ID_ADPCM_DTK:
                 return frame_bytes / (16 * ch) * 28;
             case AV_CODEC_ID_ADPCM_4XM:
+            case AV_CODEC_ID_ADPCM_IMA_DAT4:
             case AV_CODEC_ID_ADPCM_IMA_ISS:
                 return (frame_bytes - 4 * ch) * 2 / ch;
             case AV_CODEC_ID_ADPCM_IMA_SMJPEG:

libavcodec/version.h

@@ -28,7 +28,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  57
-#define LIBAVCODEC_VERSION_MINOR  33
+#define LIBAVCODEC_VERSION_MINOR  34
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \