lavc: add little-endian ADPCM_THP decoder

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Changelog

@@ -4,6 +4,7 @@ releases are sorted from youngest to oldest.
 version <next>:
 - colorkey video filter
 - BFSTM demuxer
+- little-endian ADPCM_THP decoder
 
 
 version 2.7:

libavcodec/adpcm.c

@@ -105,6 +105,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
     case AV_CODEC_ID_ADPCM_EA_R3:
     case AV_CODEC_ID_ADPCM_EA_XAS:
     case AV_CODEC_ID_ADPCM_THP:
+    case AV_CODEC_ID_ADPCM_THP_LE:
         max_channels = 6;
         break;
     }
@@ -145,6 +146,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
         case AV_CODEC_ID_ADPCM_EA_R3:
         case AV_CODEC_ID_ADPCM_EA_XAS:
         case AV_CODEC_ID_ADPCM_THP:
+        case AV_CODEC_ID_ADPCM_THP_LE:
         case AV_CODEC_ID_ADPCM_AFC:
         case AV_CODEC_ID_ADPCM_DTK:
             avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
@@ -636,13 +638,16 @@ static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
         break;
     }
     case AV_CODEC_ID_ADPCM_THP:
+    case AV_CODEC_ID_ADPCM_THP_LE:
         if (avctx->extradata) {
-            nb_samples = buf_size / (8 * ch) * 14;
+            nb_samples = buf_size * 14 / (8 * ch);
             break;
         }
         has_coded_samples = 1;
         bytestream2_skip(gb, 4); // channel size
-        *coded_samples  = bytestream2_get_be32(gb);
+        *coded_samples  = (avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE) ?
+                          bytestream2_get_le32(gb) :
+                          bytestream2_get_be32(gb);
         *coded_samples -= *coded_samples % 14;
         nb_samples      = (buf_size - (8 + 36 * ch)) / (8 * ch) * 14;
         break;
@@ -1415,10 +1420,17 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
         break;
     }
     case AV_CODEC_ID_ADPCM_THP:
+    case AV_CODEC_ID_ADPCM_THP_LE:
     {
         int table[6][16];
         int ch;
 
+#define THP_GET16(g) \
+    sign_extend( \
+        avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
+        bytestream2_get_le16u(&(g)) : \
+        bytestream2_get_be16u(&(g)), 16)
+
         if (avctx->extradata) {
             GetByteContext tb;
             if (avctx->extradata_size < 32 * avctx->channels) {
@@ -1429,16 +1441,16 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
             bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
             for (i = 0; i < avctx->channels; i++)
                 for (n = 0; n < 16; n++)
-                    table[i][n] = sign_extend(bytestream2_get_be16u(&tb), 16);
+                    table[i][n] = THP_GET16(tb);
         } else {
         for (i = 0; i < avctx->channels; i++)
             for (n = 0; n < 16; n++)
-                table[i][n] = sign_extend(bytestream2_get_be16u(&gb), 16);
+                table[i][n] = THP_GET16(gb);
 
         /* Initialize the previous sample.  */
         for (i = 0; i < avctx->channels; i++) {
-            c->status[i].sample1 = sign_extend(bytestream2_get_be16u(&gb), 16);
-            c->status[i].sample2 = sign_extend(bytestream2_get_be16u(&gb), 16);
+            c->status[i].sample1 = THP_GET16(gb);
+            c->status[i].sample2 = THP_GET16(gb);
         }
         }
 
@@ -1593,6 +1605,7 @@ ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2,     sample_fmts_s16,  adpcm_sbpro_2,
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3,     sample_fmts_s16,  adpcm_sbpro_3,     "ADPCM Sound Blaster Pro 2.6-bit");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4,     sample_fmts_s16,  adpcm_sbpro_4,     "ADPCM Sound Blaster Pro 4-bit");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF,         sample_fmts_s16,  adpcm_swf,         "ADPCM Shockwave Flash");
+ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP_LE,      sample_fmts_s16p, adpcm_thp_le,      "ADPCM Nintendo Gamecube THP (little-endian)");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP,         sample_fmts_s16p, adpcm_thp,         "ADPCM Nintendo Gamecube THP");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA,          sample_fmts_s16p, adpcm_xa,          "ADPCM CDROM XA");
 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA,      sample_fmts_s16,  adpcm_yamaha,      "ADPCM Yamaha");

libavcodec/allcodecs.c

@@ -486,6 +486,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER(ADPCM_SBPRO_4,     adpcm_sbpro_4);
     REGISTER_ENCDEC (ADPCM_SWF,         adpcm_swf);
     REGISTER_DECODER(ADPCM_THP,         adpcm_thp);
+    REGISTER_DECODER(ADPCM_THP_LE,      adpcm_thp_le);
     REGISTER_DECODER(ADPCM_VIMA,        adpcm_vima);
     REGISTER_DECODER(ADPCM_XA,          adpcm_xa);
     REGISTER_ENCDEC (ADPCM_YAMAHA,      adpcm_yamaha);

libavcodec/avcodec.h

@@ -401,6 +401,7 @@ enum AVCodecID {
     AV_CODEC_ID_ADPCM_DTK  = MKBETAG('D','T','K',' '),
     AV_CODEC_ID_ADPCM_IMA_RAD = MKBETAG('R','A','D',' '),
     AV_CODEC_ID_ADPCM_G726LE = MKBETAG('6','2','7','G'),
+    AV_CODEC_ID_ADPCM_THP_LE = MKBETAG('T','H','P','L'),
 
     /* AMR */
     AV_CODEC_ID_AMR_NB = 0x12000,

libavcodec/codec_desc.c

@@ -1823,6 +1823,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("ADPCM Nintendo Gamecube THP"),
         .props     = AV_CODEC_PROP_LOSSY,
     },
+    {
+        .id        = AV_CODEC_ID_ADPCM_THP_LE,
+        .type      = AVMEDIA_TYPE_AUDIO,
+        .name      = "adpcm_thp_le",
+        .long_name = NULL_IF_CONFIG_SMALL("ADPCM Nintendo Gamecube THP (Little-Endian)"),
+        .props     = AV_CODEC_PROP_LOSSY,
+    },
     {
         .id        = AV_CODEC_ID_ADPCM_IMA_AMV,
         .type      = AVMEDIA_TYPE_AUDIO,

libavcodec/utils.c

@@ -3431,6 +3431,7 @@ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
             case AV_CODEC_ID_ADPCM_IMA_AMV:
                 return (frame_bytes - 8) * 2 / ch;
             case AV_CODEC_ID_ADPCM_THP:
+            case AV_CODEC_ID_ADPCM_THP_LE:
                 if (avctx->extradata)
                     return frame_bytes * 14 / (8 * ch);
                 break;

libavcodec/version.h

@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR  41
+#define LIBAVCODEC_VERSION_MINOR  42
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \