ADPCM IMA Dialogic decoder

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

Changelog

@@ -29,6 +29,7 @@ version <next>:
 - BRender PIX image decoder
 - ffprobe -show_entries option
 - ffprobe -sections option
+- ADPCM IMA Dialogic decoder
 
 
 version 1.0:

doc/general.texi

@@ -749,6 +749,7 @@ following image formats are supported:
 @item ADPCM IMA Westwood     @tab     @tab  X
 @item ADPCM ISS IMA          @tab     @tab  X
     @tab Used in FunCom games.
+@item ADPCM IMA Dialogic     @tab     @tab  X
 @item ADPCM IMA Duck DK3     @tab     @tab  X
     @tab Used in some Sega Saturn console games.
 @item ADPCM IMA Duck DK4     @tab     @tab  X

libavcodec/Makefile

@@ -585,6 +585,7 @@ OBJS-$(CONFIG_ADPCM_IMA_DK4_DECODER)      += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_IMA_EA_EACS_DECODER)  += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_IMA_EA_SEAD_DECODER)  += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_IMA_ISS_DECODER)      += adpcm.o adpcm_data.o
+OBJS-$(CONFIG_ADPCM_IMA_OKI_DECODER)      += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_IMA_QT_DECODER)       += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_IMA_QT_ENCODER)       += adpcmenc.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_IMA_SMJPEG_DECODER)   += adpcm.o adpcm_data.o

libavcodec/adpcm.c

@@ -229,6 +229,27 @@ static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
     return c->sample1;
 }
 
+static inline short adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
+{
+    int step_index, predictor, sign, delta, diff, step;
+
+    step = ff_adpcm_oki_step_table[c->step_index];
+    step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
+    step_index = av_clip(step_index, 0, 48);
+
+    sign = nibble & 8;
+    delta = nibble & 7;
+    diff = ((2 * delta + 1) * step) >> 3;
+    predictor = c->predictor;
+    if (sign) predictor -= diff;
+    else predictor += diff;
+
+    c->predictor = av_clip(predictor, -2048, 2047);
+    c->step_index = step_index;
+
+    return c->predictor << 4;
+}
+
 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
 {
     int sign, delta, diff;
@@ -460,6 +481,7 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
     case AV_CODEC_ID_ADPCM_CT:
     case AV_CODEC_ID_ADPCM_IMA_APC:
     case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
+    case AV_CODEC_ID_ADPCM_IMA_OKI:
     case AV_CODEC_ID_ADPCM_IMA_WS:
     case AV_CODEC_ID_ADPCM_YAMAHA:
         nb_samples = buf_size * 2 / ch;
@@ -877,6 +899,13 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
             *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
         }
         break;
+    case AV_CODEC_ID_ADPCM_IMA_OKI:
+        while (bytestream2_get_bytes_left(&gb) > 0) {
+            int v = bytestream2_get_byteu(&gb);
+            *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0],  v >> 4  );
+            *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
+        }
+        break;
     case AV_CODEC_ID_ADPCM_IMA_WS:
         if (c->vqa_version == 3) {
             for (channel = 0; channel < avctx->channels; channel++) {
@@ -1371,6 +1400,7 @@ ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4,     sample_fmts_s16,  adpcm_ima_dk4,
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16,  adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16,  adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS,     sample_fmts_s16,  adpcm_ima_iss,     "ADPCM IMA Funcom ISS");
+ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI,     sample_fmts_s16,  adpcm_ima_oki,     "ADPCM IMA Dialogic OKI");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT,      sample_fmts_s16p, adpcm_ima_qt,      "ADPCM IMA QuickTime");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG,  sample_fmts_s16,  adpcm_ima_smjpeg,  "ADPCM IMA Loki SDL MJPEG");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV,     sample_fmts_s16p, adpcm_ima_wav,     "ADPCM IMA WAV");

libavcodec/adpcm_data.c

@@ -49,6 +49,14 @@ const int16_t ff_adpcm_step_table[89] = {
     15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
 };
 
+const int16_t ff_adpcm_oki_step_table[49] = {
+     16,  17,  19,  21,   23,   25,   28,   31,   34,  37,
+     41,  45,  50,  55,   60,   66,   73,   80,   88,  97,
+    107, 118, 130, 143,  157,  173,  190,  209,  230, 253,
+    279, 307, 337, 371,  408,  449,  494,  544,  598, 658,
+    724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552
+};
+
 /* These are for MS-ADPCM */
 /* ff_adpcm_AdaptationTable[], ff_adpcm_AdaptCoeff1[], and
    ff_adpcm_AdaptCoeff2[] are from libsndfile */

libavcodec/adpcm_data.h

@@ -30,6 +30,7 @@
 
 extern const int8_t  ff_adpcm_index_table[16];
 extern const int16_t ff_adpcm_step_table[89];
+extern const int16_t ff_adpcm_oki_step_table[49];
 extern const int16_t ff_adpcm_AdaptationTable[];
 extern const uint8_t ff_adpcm_AdaptCoeff1[];
 extern const int8_t  ff_adpcm_AdaptCoeff2[];

libavcodec/allcodecs.c

@@ -404,6 +404,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs);
     REGISTER_DECODER (ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead);
     REGISTER_DECODER (ADPCM_IMA_ISS, adpcm_ima_iss);
+    REGISTER_DECODER (ADPCM_IMA_OKI, adpcm_ima_oki);
     REGISTER_ENCDEC  (ADPCM_IMA_QT, adpcm_ima_qt);
     REGISTER_DECODER (ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg);
     REGISTER_ENCDEC  (ADPCM_IMA_WAV, adpcm_ima_wav);

libavcodec/avcodec.h

@@ -353,6 +353,7 @@ enum AVCodecID {
     AV_CODEC_ID_ADPCM_IMA_APC,
     AV_CODEC_ID_VIMA       = MKBETAG('V','I','M','A'),
     AV_CODEC_ID_ADPCM_AFC  = MKBETAG('A','F','C',' '),
+    AV_CODEC_ID_ADPCM_IMA_OKI = MKBETAG('O','K','I',' '),
 
     /* AMR */
     AV_CODEC_ID_AMR_NB = 0x12000,

libavcodec/codec_desc.c

@@ -1763,6 +1763,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("ADPCM Nintendo Gamecube AFC"),
         .props     = AV_CODEC_PROP_LOSSY,
     },
+    {
+        .id        = AV_CODEC_ID_ADPCM_IMA_OKI,
+        .type      = AVMEDIA_TYPE_AUDIO,
+        .name      = "adpcm_ima_oki",
+        .long_name = NULL_IF_CONFIG_SMALL("ADPCM IMA Dialogic OKI"),
+        .props     = AV_CODEC_PROP_LOSSY,
+    },
 
     /* AMR */
     {

libavcodec/utils.c

@@ -2300,6 +2300,7 @@ int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
     case AV_CODEC_ID_ADPCM_CT:
     case AV_CODEC_ID_ADPCM_IMA_APC:
     case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
+    case AV_CODEC_ID_ADPCM_IMA_OKI:
     case AV_CODEC_ID_ADPCM_IMA_WS:
     case AV_CODEC_ID_ADPCM_G722:
     case AV_CODEC_ID_ADPCM_YAMAHA:

libavcodec/version.h

@@ -29,7 +29,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 54
-#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, \

libavformat/riff.c

@@ -338,8 +338,10 @@ const AVCodecTag ff_codec_wav_tags[] = {
     { AV_CODEC_ID_PCM_ALAW,        0x0006 },
     { AV_CODEC_ID_PCM_MULAW,       0x0007 },
     { AV_CODEC_ID_WMAVOICE,        0x000A },
+    { AV_CODEC_ID_ADPCM_IMA_OKI,   0x0010 },
     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0011 },
     { AV_CODEC_ID_PCM_ZORK,        0x0011 }, /* must come after adpcm_ima_wav in this list */
+    { AV_CODEC_ID_ADPCM_IMA_OKI,   0x0017 },
     { AV_CODEC_ID_ADPCM_YAMAHA,    0x0020 },
     { AV_CODEC_ID_TRUESPEECH,      0x0022 },
     { AV_CODEC_ID_GSM_MS,          0x0031 },