X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fsvq3.c;h=c8db08a32f0724f6d885c88e57d8dba5b735cb73;hb=df08db07110dc00f7dc0ca8bc5162fffcb9008c7;hp=18a4448ffa702a3c5254bef599377abdf0613070;hpb=44085b9951b06df1cab4105dcda004213988d84f;p=ffmpeg

diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 18a4448ffa7..c8db08a32f0 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -43,6 +43,8 @@
 #include <inttypes.h>
 
 #include "libavutil/attributes.h"
+#include "libavutil/crc.h"
+
 #include "internal.h"
 #include "avcodec.h"
 #include "mpegutils.h"
@@ -1183,6 +1185,7 @@ static av_cold int svq3_decode_init(AVCodecContext *avctx)
         GetBitContext gb;
         int frame_size_code;
         int unk0, unk1, unk2, unk3, unk4;
+        int w,h;
 
         size = AV_RB32(&extradata[4]);
         if (size > extradata_end - extradata - 8) {
@@ -1195,38 +1198,41 @@ static av_cold int svq3_decode_init(AVCodecContext *avctx)
         frame_size_code = get_bits(&gb, 3);
         switch (frame_size_code) {
         case 0:
-            avctx->width  = 160;
-            avctx->height = 120;
+            w = 160;
+            h = 120;
             break;
         case 1:
-            avctx->width  = 128;
-            avctx->height =  96;
+            w = 128;
+            h =  96;
             break;
         case 2:
-            avctx->width  = 176;
-            avctx->height = 144;
+            w = 176;
+            h = 144;
             break;
         case 3:
-            avctx->width  = 352;
-            avctx->height = 288;
+            w = 352;
+            h = 288;
             break;
         case 4:
-            avctx->width  = 704;
-            avctx->height = 576;
+            w = 704;
+            h = 576;
             break;
         case 5:
-            avctx->width  = 240;
-            avctx->height = 180;
+            w = 240;
+            h = 180;
             break;
         case 6:
-            avctx->width  = 320;
-            avctx->height = 240;
+            w = 320;
+            h = 240;
             break;
         case 7:
-            avctx->width  = get_bits(&gb, 12);
-            avctx->height = get_bits(&gb, 12);
+            w = get_bits(&gb, 12);
+            h = get_bits(&gb, 12);
             break;
         }
+        ret = ff_set_dimensions(avctx, w, h);
+        if (ret < 0)
+            goto fail;
 
         s->halfpel_flag  = get_bits1(&gb);
         s->thirdpel_flag = get_bits1(&gb);
@@ -1289,7 +1295,8 @@ static av_cold int svq3_decode_init(AVCodecContext *avctx)
                 ret = -1;
                 goto fail;
             }
-            s->watermark_key = ff_svq1_packet_checksum(buf, buf_len, 0);
+            s->watermark_key = av_bswap16(av_crc(av_crc_get_table(AV_CRC_16_CCITT), 0, buf, buf_len));
+
             s->watermark_key = s->watermark_key << 16 | s->watermark_key;
             av_log(avctx, AV_LOG_DEBUG,
                    "watermark key %#"PRIx32"\n", s->watermark_key);