H.264: make filter_mb_fast support the case of unavailable top mb

[ffmpeg] / libavcodec / zmbv.c

diff --git a/libavcodec/zmbv.c b/libavcodec/zmbv.c
index f150a866399e2d7490ccd6d92672e20754c04ab6..deae580d20f49ae91f1c7171484168801b7fd42b 100644 (file)
--- a/libavcodec/zmbv.c
+++ b/libavcodec/zmbv.c
@@ -2,25 +2,25 @@
  * Zip Motion Blocks Video (ZMBV) decoder
  * Copyright (c) 2006 Konstantin Shishkov
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
- * @file libavcodec/zmbv.c
+ * @file
  * Zip Motion Blocks Video decoder
  */
 
@@ -397,7 +397,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     ZmbvContext * const c = avctx->priv_data;
-    uint8_t *outptr;
     int zret = Z_OK; // Zlib return code
     int len = buf_size;
     int hi_ver, lo_ver;
@@ -412,8 +411,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
         return -1;
     }
 
-    outptr = c->pic.data[0]; // Output image pointer
-
     /* parse header */
     c->flags = buf[0];
     buf++; len--;
@@ -434,6 +431,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
         }
         if(c->bw == 0 || c->bh == 0) {
             av_log(avctx, AV_LOG_ERROR, "Unsupported block size %ix%i\n", c->bw, c->bh);
+            return -1;
         }
         if(c->comp != 0 && c->comp != 1) {
             av_log(avctx, AV_LOG_ERROR, "Unsupported compression type %i\n", c->comp);
@@ -502,11 +500,11 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
     }
     if(c->flags & ZMBV_KEYFRAME) {
         c->pic.key_frame = 1;
-        c->pic.pict_type = FF_I_TYPE;
+        c->pic.pict_type = AV_PICTURE_TYPE_I;
         c->decode_intra(c);
     } else {
         c->pic.key_frame = 0;
-        c->pic.pict_type = FF_P_TYPE;
+        c->pic.pict_type = AV_PICTURE_TYPE_P;
         if(c->decomp_len)
             c->decode_xor(c);
     }
@@ -602,9 +600,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
     c->width = avctx->width;
     c->height = avctx->height;
 
-    if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
-        return 1;
-    }
     c->bpp = avctx->bits_per_coded_sample;
 
     // Needed if zlib unused or init aborted before inflateInit
@@ -655,15 +650,16 @@ static av_cold int decode_end(AVCodecContext *avctx)
     return 0;
 }
 
-AVCodec zmbv_decoder = {
+AVCodec ff_zmbv_decoder = {
     "zmbv",
-    CODEC_TYPE_VIDEO,
+    AVMEDIA_TYPE_VIDEO,
     CODEC_ID_ZMBV,
     sizeof(ZmbvContext),
     decode_init,
     NULL,
     decode_end,
     decode_frame,
+    CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("Zip Motion Blocks Video"),
 };