avcodec: Constify AVCodecs

[ffmpeg] / libavcodec / libvorbisdec.c

diff --git a/libavcodec/libvorbisdec.c b/libavcodec/libvorbisdec.c
index 89cbbb41b6898e74c7f11e21445d328dd4729746..5686aaf0965890d10302230dd5f0b25689c70f58 100644 (file)
--- a/libavcodec/libvorbisdec.c
+++ b/libavcodec/libvorbisdec.c
@@ -64,22 +64,25 @@ static int oggvorbis_decode_init(AVCodecContext *avccontext) {
         }
     } else if(*p == 2) {
         unsigned int offset = 1;
+        unsigned int sizesum = 1;
         p++;
         for(i=0; i<2; i++) {
             hsizes[i] = 0;
-            while((*p == 0xFF) && (offset < avccontext->extradata_size)) {
+            while((*p == 0xFF) && (sizesum < avccontext->extradata_size)) {
                 hsizes[i] += 0xFF;
                 offset++;
+                sizesum += 1 + 0xFF;
                 p++;
             }
-            if(offset >= avccontext->extradata_size - 1) {
+            hsizes[i] += *p;
+            offset++;
+            sizesum += 1 + *p;
+            if(sizesum > avccontext->extradata_size) {
                 av_log(avccontext, AV_LOG_ERROR,
                        "vorbis header sizes damaged\n");
                 ret = AVERROR_INVALIDDATA;
                 goto error;
             }
-            hsizes[i] += *p;
-            offset++;
             p++;
         }
         hsizes[2] = avccontext->extradata_size - hsizes[0]-hsizes[1]-offset;
@@ -205,7 +208,7 @@ static int oggvorbis_decode_close(AVCodecContext *avccontext) {
 }
 
 
-AVCodec ff_libvorbis_decoder = {
+const AVCodec ff_libvorbis_decoder = {
     .name           = "libvorbis",
     .long_name      = NULL_IF_CONFIG_SMALL("libvorbis"),
     .type           = AVMEDIA_TYPE_AUDIO,
@@ -214,5 +217,5 @@ AVCodec ff_libvorbis_decoder = {
     .init           = oggvorbis_decode_init,
     .decode         = oggvorbis_decode_frame,
     .close          = oggvorbis_decode_close,
-    .capabilities   = AV_CODEC_CAP_DELAY,
+    .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_CHANNEL_CONF,
 };