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id3v1: Seek back to old position after reading.

FFmpeg did not seek back to the original position, but to "0", making
reading a VBR tag impossible.
(issue 2645)

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Carl Eugen Hoyos authored on 2011/03/26 03:46:27
Showing 1 changed files

libavformat/id3v1.c index e0a2f43..23cacf7 100644

libavformat/id3v1.c

History View file @ 13eadba

@@ -227,6 +227,7 @@ void ff_id3v1_read(AVFormatContext *s)
 {
     int ret, filesize;
     uint8_t buf[ID3v1_TAG_SIZE];
+    int64_t position = avio_tell(s->pb);
 
     if (!url_is_streamed(s->pb)) {
         /* XXX: change that */
@@ -237,7 +238,7 @@ void ff_id3v1_read(AVFormatContext *s)
             if (ret == ID3v1_TAG_SIZE) {
                 parse_tag(s, buf);
             }
-            avio_seek(s->pb, 0, SEEK_SET);
+            avio_seek(s->pb, position, SEEK_SET);
         }
     }
 }

...	...	@@ -227,6 +227,7 @@ void ff_id3v1_read(AVFormatContext *s)
227	227	{
228	228	int ret, filesize;
229	229	uint8_t buf[ID3v1_TAG_SIZE];
	230	+ int64_t position = avio_tell(s->pb);
230	231
231	232	if (!url_is_streamed(s->pb)) {
232	233	/* XXX: change that */
...	...	@@ -237,7 +238,7 @@ void ff_id3v1_read(AVFormatContext *s)
237	237	if (ret == ID3v1_TAG_SIZE) {
238	238	parse_tag(s, buf);
239	239	}
240		- avio_seek(s->pb, 0, SEEK_SET);
	240	+ avio_seek(s->pb, position, SEEK_SET);
241	241	}
242	242	}
243	243	}