iac: generate codec tables as they are supposed to be

[ffmpeg] / libavcodec / adpcm.c

diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 67601b4872cdd569dfc6c95b154d65b6c6bfa3f4..8170e7f4163171108401168239478b99dd7f709e 100644 (file)
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -128,7 +128,7 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
         }
         break;
     case CODEC_ID_ADPCM_IMA_WS:
-        if (avctx->extradata && avctx->extradata_size >= 42)
+        if (avctx->extradata && avctx->extradata_size >= 2)
             c->vqa_version = AV_RL16(avctx->extradata);
         break;
     default:
@@ -1209,12 +1209,14 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
         int prev[2][2];
         int ch;
 
-        for (i = 0; i < 32; i++)
-            table[0][i] = sign_extend(bytestream2_get_be16u(&gb), 16);
+        for (i = 0; i < 2; i++)
+            for (n = 0; n < 16; n++)
+                table[i][n] = sign_extend(bytestream2_get_be16u(&gb), 16);
 
         /* Initialize the previous sample.  */
-        for (i = 0; i < 4; i++)
-            prev[0][i] = sign_extend(bytestream2_get_be16u(&gb), 16);
+        for (i = 0; i < 2; i++)
+            for (n = 0; n < 2; n++)
+                prev[i][n] = sign_extend(bytestream2_get_be16u(&gb), 16);
 
         for (ch = 0; ch <= st; ch++) {
             samples = (short *)c->frame.data[0] + ch;