ttadec: remove dead code

[ffmpeg] / libavcodec / adpcm.c

diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 2081ef64d75a5d38f51958c659140a5215b7d484..bd86ab0e61b49e1b614ed0f67b344dddf3e8ef7a 100644 (file)
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -86,14 +86,19 @@ static const int swf_index_tables[4][16] = {
 typedef struct ADPCMDecodeContext {
     AVFrame frame;
     ADPCMChannelStatus status[6];
+    int vqa_version;                /**< VQA version. Used for ADPCM_IMA_WS */
 } ADPCMDecodeContext;
 
 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
 {
     ADPCMDecodeContext *c = avctx->priv_data;
+    unsigned int min_channels = 1;
     unsigned int max_channels = 2;
 
     switch(avctx->codec->id) {
+    case CODEC_ID_ADPCM_EA:
+        min_channels = 2;
+        break;
     case CODEC_ID_ADPCM_EA_R1:
     case CODEC_ID_ADPCM_EA_R2:
     case CODEC_ID_ADPCM_EA_R3:
@@ -101,7 +106,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
         max_channels = 6;
         break;
     }
-    if (avctx->channels <= 0 || avctx->channels > max_channels) {
+    if (avctx->channels < min_channels || avctx->channels > max_channels) {
         av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
         return AVERROR(EINVAL);
     }
@@ -116,12 +121,16 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
             return -1;
         }
         break;
-    case CODEC_ID_ADPCM_IMA_WS:
-        if (avctx->extradata && avctx->extradata_size == 2 * 4) {
+    case CODEC_ID_ADPCM_IMA_APC:
+        if (avctx->extradata && avctx->extradata_size >= 8) {
             c->status[0].predictor = AV_RL32(avctx->extradata);
             c->status[1].predictor = AV_RL32(avctx->extradata + 4);
         }
         break;
+    case CODEC_ID_ADPCM_IMA_WS:
+        if (avctx->extradata && avctx->extradata_size >= 42)
+            c->vqa_version = AV_RL16(avctx->extradata);
+        break;
     default:
         break;
     }
@@ -355,6 +364,7 @@ static int get_nb_samples(AVCodecContext *avctx, const uint8_t *buf,
         break;
     /* simple 4-bit adpcm */
     case CODEC_ID_ADPCM_CT:
+    case CODEC_ID_ADPCM_IMA_APC:
     case CODEC_ID_ADPCM_IMA_EA_SEAD:
     case CODEC_ID_ADPCM_IMA_WS:
     case CODEC_ID_ADPCM_YAMAHA:
@@ -769,13 +779,37 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
             *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
         }
         break;
-    case CODEC_ID_ADPCM_IMA_WS:
+    case CODEC_ID_ADPCM_IMA_APC:
         while (src < buf + buf_size) {
             uint8_t v = *src++;
             *samples++ = adpcm_ima_expand_nibble(&c->status[0],  v >> 4  , 3);
             *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
         }
         break;
+    case CODEC_ID_ADPCM_IMA_WS:
+        for (channel = 0; channel < avctx->channels; channel++) {
+            const uint8_t *src0;
+            int src_stride;
+            int16_t *smp = samples + channel;
+
+            if (c->vqa_version == 3) {
+                src0 = src + channel * buf_size / 2;
+                src_stride = 1;
+            } else {
+                src0 = src + channel;
+                src_stride = avctx->channels;
+            }
+            for (n = nb_samples / 2; n > 0; n--) {
+                uint8_t v = *src0;
+                src0 += src_stride;
+                *smp = adpcm_ima_expand_nibble(&c->status[channel], v >> 4  , 3);
+                smp += avctx->channels;
+                *smp = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
+                smp += avctx->channels;
+            }
+        }
+        src = buf + buf_size;
+        break;
     case CODEC_ID_ADPCM_XA:
         while (buf_size >= 128) {
             xa_decode(samples, src, &c->status[0], &c->status[1],
@@ -1216,6 +1250,7 @@ ADPCM_DECODER(CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2, "ADPCM Electronic Arts R2");
 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3, "ADPCM Electronic Arts R3");
 ADPCM_DECODER(CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv, "ADPCM IMA AMV");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_APC, adpcm_ima_apc, "ADPCM IMA CRYO APC");
 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");