pcmdec: use memcpy() when possible for planar decoders

This is faster (at least with clang).
Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/pcm.c

@@ -332,6 +332,9 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
     case AV_CODEC_ID_PCM_S24LE:
         DECODE(32, le24, src, samples, n, 8, 0)
         break;
+    case AV_CODEC_ID_PCM_S24LE_PLANAR:
+        DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
+        break;
     case AV_CODEC_ID_PCM_S24BE:
         DECODE(32, be24, src, samples, n, 8, 0)
         break;
@@ -350,18 +353,6 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
             samples += 2;
         }
         break;
-    case AV_CODEC_ID_PCM_S16BE_PLANAR:
-        DECODE_PLANAR(16, be16, src, samples, n, 0, 0);
-        break;
-    case AV_CODEC_ID_PCM_S16LE_PLANAR:
-        DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
-        break;
-    case AV_CODEC_ID_PCM_S24LE_PLANAR:
-        DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
-        break;
-    case AV_CODEC_ID_PCM_S32LE_PLANAR:
-        DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
-        break;
     case AV_CODEC_ID_PCM_U16LE:
         DECODE(16, le16, src, samples, n, 0, 0x8000)
         break;
@@ -389,9 +380,15 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
     case AV_CODEC_ID_PCM_F32LE:
         DECODE(32, le32, src, samples, n, 0, 0)
         break;
+    case AV_CODEC_ID_PCM_S32LE_PLANAR:
+        DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
+        break;
     case AV_CODEC_ID_PCM_S16LE:
         DECODE(16, le16, src, samples, n, 0, 0)
         break;
+    case AV_CODEC_ID_PCM_S16LE_PLANAR:
+        DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
+        break;
     case AV_CODEC_ID_PCM_F64BE:
     case AV_CODEC_ID_PCM_F32BE:
     case AV_CODEC_ID_PCM_S32BE:
@@ -407,6 +404,9 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
     case AV_CODEC_ID_PCM_S16BE:
         DECODE(16, be16, src, samples, n, 0, 0)
         break;
+    case AV_CODEC_ID_PCM_S16BE_PLANAR:
+        DECODE_PLANAR(16, be16, src, samples, n, 0, 0);
+        break;
     case AV_CODEC_ID_PCM_F64LE:
     case AV_CODEC_ID_PCM_F32LE:
     case AV_CODEC_ID_PCM_S32LE:
@@ -415,6 +415,18 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
     case AV_CODEC_ID_PCM_U8:
         memcpy(samples, src, n * sample_size);
         break;
+#if HAVE_BIGENDIAN
+    case AV_CODEC_ID_PCM_S16BE_PLANAR:
+#else
+    case AV_CODEC_ID_PCM_S16LE_PLANAR:
+    case AV_CODEC_ID_PCM_S32LE_PLANAR:
+#endif /* HAVE_BIGENDIAN */
+        n /= avctx->channels;
+        for (c = 0; c < avctx->channels; c++) {
+            samples = s->frame.extended_data[c];
+            bytestream_get_buffer(&src, samples, n * sample_size);
+        }
+        break;
     case AV_CODEC_ID_PCM_ZORK:
         for (; n > 0; n--) {
             int v = *src++;