X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fsheervideo.c;h=9d2da7ffb48725e56d640659216df10a1d9acd1b;hb=54d839e80a06ed7c195ed0b60af3cd7a744e7085;hp=e8f008b7e4a5977b53141387ebbb6c37b0431756;hpb=4ad5b9363fcfb06ed34fc95f11837986edd3de6a;p=ffmpeg

diff --git a/libavcodec/sheervideo.c b/libavcodec/sheervideo.c
index e8f008b7e4a..9d2da7ffb48 100644
--- a/libavcodec/sheervideo.c
+++ b/libavcodec/sheervideo.c
@@ -2185,7 +2185,7 @@ static void decode_aybri(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
             dst_v[x] = get_bits(gb, 8);
         }
     } else {
-        int pred[4] = { 125, 125, -128, -128 };
+        int pred[4] = { 125, s->alt ? 125 : -146, -128, -128 };
 
         for (x = 0; x < avctx->width; x++) {
             int a, y, u, v;
@@ -2263,7 +2263,7 @@ static void decode_aybr(AVCodecContext *avctx, AVFrame *p, GetBitContext *gb)
             dst_v[x] = get_bits(gb, 8);
         }
     } else {
-        int pred[4] = { 125, 125, -128, -128 };
+        int pred[4] = { 125, s->alt ? 125 : -146, -128, -128 };
 
         for (x = 0; x < avctx->width; x++) {
             int a, y, u, v;
@@ -2959,6 +2959,7 @@ static int decode_frame(AVCodecContext *avctx,
         }
         break;
     case MKTAG('A', 'Y', 'B', 'R'):
+        s->alt = 1;
     case MKTAG('A', 'Y', 'b', 'R'):
         avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
         s->decode_frame = decode_aybr;
@@ -2968,6 +2969,7 @@ static int decode_frame(AVCodecContext *avctx,
         }
         break;
     case MKTAG('A', 'y', 'B', 'R'):
+        s->alt = 1;
     case MKTAG('A', 'y', 'b', 'R'):
         avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
         s->decode_frame = decode_aybri;