diff options
Diffstat (limited to 'libavformat/id3v2.c')
| -rw-r--r-- | libavformat/id3v2.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c index efaf7682cb..43636ec9e9 100644 --- a/libavformat/id3v2.c +++ b/libavformat/id3v2.c @@ -878,16 +878,25 @@ error: static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata, AVFormatContext *s, const char *magic, - ID3v2ExtraMeta **extra_meta) + ID3v2ExtraMeta **extra_meta, int64_t max_search_size) { int len, ret; uint8_t buf[ID3v2_HEADER_SIZE]; int found_header; - int64_t off; + int64_t start, off; + if (max_search_size && max_search_size < ID3v2_HEADER_SIZE) + return; + + start = avio_tell(pb); do { /* save the current offset in case there's nothing to read/skip */ off = avio_tell(pb); + if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) { + avio_seek(pb, off, SEEK_SET); + break; + } + ret = avio_read(pb, buf, ID3v2_HEADER_SIZE); if (ret != ID3v2_HEADER_SIZE) { avio_seek(pb, off, SEEK_SET); @@ -914,13 +923,13 @@ static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata, void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta) { - id3v2_read_internal(pb, metadata, NULL, magic, extra_meta); + id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0); } void ff_id3v2_read(AVFormatContext *s, const char *magic, - ID3v2ExtraMeta **extra_meta) + ID3v2ExtraMeta **extra_meta, unsigned int max_search_size) { - id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta); + id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size); } void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta) |