[FFmpeg-devel] [PATCH 1/2] avcodec: add ADPCM AICA decoder

[Paul B Mahol]

Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
 libavcodec/Makefile     |  1 +
 libavcodec/adpcm.c      | 13 +++++++++++++
 libavcodec/allcodecs.c  |  1 +
 libavcodec/avcodec.h    |  1 +
 libavcodec/codec_desc.c |  7 +++++++
 5 files changed, 23 insertions(+)

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 5f38ebb..8162447 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -662,6 +662,7 @@ OBJS-$(CONFIG_ADPCM_4XM_DECODER)          += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_ADX_DECODER)          += adxdec.o adx.o
 OBJS-$(CONFIG_ADPCM_ADX_ENCODER)          += adxenc.o adx.o
 OBJS-$(CONFIG_ADPCM_AFC_DECODER)          += adpcm.o adpcm_data.o
+OBJS-$(CONFIG_ADPCM_AICA_DECODER)         += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_CT_DECODER)           += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_DTK_DECODER)          += adpcm.o adpcm_data.o
 OBJS-$(CONFIG_ADPCM_EA_DECODER)           += adpcm.o adpcm_data.o
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 98af171..64ef5e4 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -143,6 +143,7 @@ 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_QT:
         case AV_CODEC_ID_ADPCM_IMA_WAV:
         case AV_CODEC_ID_ADPCM_4XM:
@@ -521,6 +522,7 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
     case AV_CODEC_ID_ADPCM_IMA_OKI:
     case AV_CODEC_ID_ADPCM_IMA_WS:
     case AV_CODEC_ID_ADPCM_YAMAHA:
+    case AV_CODEC_ID_ADPCM_AICA:
         nb_samples = buf_size * 2 / ch;
         break;
     }
@@ -1380,6 +1382,16 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
             *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4  );
         }
         break;
+    case AV_CODEC_ID_ADPCM_AICA:
+        for (channel = 0; channel < avctx->channels; channel++) {
+            samples = samples_p[channel];
+            for (n = nb_samples >> 1; n > 0; n--) {
+                int v = bytestream2_get_byteu(&gb);
+                *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v & 0x0F);
+                *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v >> 4  );
+            }
+        }
+        break;
     case AV_CODEC_ID_ADPCM_AFC:
     {
         int samples_per_block;
@@ -1642,6 +1654,7 @@ AVCodec ff_ ## name_ ## _decoder = {                        \
 /* Note: Do not forget to add new entries to the Makefile as well. */
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM,         sample_fmts_s16p, adpcm_4xm,         "ADPCM 4X Movie");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC,         sample_fmts_s16p, adpcm_afc,         "ADPCM Nintendo Gamecube AFC");
+ADPCM_DECODER(AV_CODEC_ID_ADPCM_AICA,        sample_fmts_s16p, adpcm_aica,        "ADPCM Yamaha AICA");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT,          sample_fmts_s16,  adpcm_ct,          "ADPCM Creative Technology");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK,         sample_fmts_s16p, adpcm_dtk,         "ADPCM Nintendo Gamecube DTK");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA,          sample_fmts_s16,  adpcm_ea,          "ADPCM Electronic Arts");
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 4b54615..49478a1 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -488,6 +488,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(ADPCM_4XM,         adpcm_4xm);
     REGISTER_ENCDEC (ADPCM_ADX,         adpcm_adx);
     REGISTER_DECODER(ADPCM_AFC,         adpcm_afc);
+    REGISTER_DECODER(ADPCM_AICA,        adpcm_aica);
     REGISTER_DECODER(ADPCM_CT,          adpcm_ct);
     REGISTER_DECODER(ADPCM_DTK,         adpcm_dtk);
     REGISTER_DECODER(ADPCM_EA,          adpcm_ea);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index c4104cf..b82a0c2 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -396,6 +396,7 @@ enum AVCodecID {
     AV_CODEC_ID_ADPCM_G726LE,
     AV_CODEC_ID_ADPCM_THP_LE,
     AV_CODEC_ID_ADPCM_PSX,
+    AV_CODEC_ID_ADPCM_AICA,
 
     /* AMR */
     AV_CODEC_ID_AMR_NB = 0x12000,
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index ac64a4b..bf7c425 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -1999,6 +1999,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("ADPCM Playstation"),
         .props     = AV_CODEC_PROP_LOSSY,
     },
+    {
+        .id        = AV_CODEC_ID_ADPCM_AICA,
+        .type      = AVMEDIA_TYPE_AUDIO,
+        .name      = "adpcm_aica",
+        .long_name = NULL_IF_CONFIG_SMALL("ADPCM Yamaha AICA"),
+        .props     = AV_CODEC_PROP_LOSSY,
+    },
 
     /* AMR */
     {
-- 
1.9.1