mpegvideo: Drop a faulty assert

[ffmpeg] / libavformat / oggparsevorbis.c

diff --git a/libavformat/oggparsevorbis.c b/libavformat/oggparsevorbis.c
index 1804e9a6af8b1dd5f08a69394ce9adb4554a5dd2..c19b54552c9a5b3688ce601aa74de20fd9cbf6ae 100644 (file)
--- a/libavformat/oggparsevorbis.c
+++ b/libavformat/oggparsevorbis.c
@@ -25,12 +25,14 @@
 #include <stdlib.h>
 
 #include "libavutil/avstring.h"
+#include "libavutil/base64.h"
 #include "libavutil/bswap.h"
 #include "libavutil/dict.h"
 #include "libavcodec/bytestream.h"
 #include "libavcodec/get_bits.h"
 #include "libavcodec/vorbis_parser.h"
 #include "avformat.h"
+#include "flac_picture.h"
 #include "internal.h"
 #include "oggdec.h"
 #include "vorbiscomment.h"
@@ -118,9 +120,7 @@ int ff_vorbis_comment(AVFormatContext *as, AVDictionary **m,
             if (!tt || !ct) {
                 av_freep(&tt);
                 av_freep(&ct);
-                av_log(as, AV_LOG_WARNING,
-                       "out-of-memory error. skipping VorbisComment tag.\n");
-                continue;
+                return AVERROR(ENOMEM);
             }
 
             for (j = 0; j < tl; j++)
@@ -130,7 +130,31 @@ int ff_vorbis_comment(AVFormatContext *as, AVDictionary **m,
             memcpy(ct, v, vl);
             ct[vl] = 0;
 
-            if (!ogm_chapter(as, tt, ct))
+            /* The format in which the pictures are stored is the FLAC format.
+             * Xiph says: "The binary FLAC picture structure is base64 encoded
+             * and placed within a VorbisComment with the tag name
+             * 'METADATA_BLOCK_PICTURE'. This is the preferred and
+             * recommended way of embedding cover art within VorbisComments."
+             */
+            if (!strcmp(tt, "METADATA_BLOCK_PICTURE")) {
+                int ret;
+                char *pict = av_malloc(vl);
+
+                if (!pict) {
+                    av_freep(&tt);
+                    av_freep(&ct);
+                    return AVERROR(ENOMEM);
+                }
+                if ((ret = av_base64_decode(pict, ct, vl)) > 0)
+                    ret = ff_flac_parse_picture(as, pict, ret);
+                av_freep(&tt);
+                av_freep(&ct);
+                av_freep(&pict);
+                if (ret < 0) {
+                    av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n");
+                    continue;
+                }
+            } else if (!ogm_chapter(as, tt, ct))
                 av_dict_set(m, tt, ct,
                             AV_DICT_DONT_STRDUP_KEY |
                             AV_DICT_DONT_STRDUP_VAL);