[FFmpeg-devel] [PATCH 1/4] libavformat/oggdec.h, libavformat/oggparsevorbis.c: Factor out vorbis metadata update mechanism.

[Romain Beauxis]

---
 libavformat/oggdec.h         | 14 ++++++++++++++
 libavformat/oggparsevorbis.c | 25 +++++++++++++++++--------
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/libavformat/oggdec.h b/libavformat/oggdec.h
index c15fbe738e..d10a9b1a89 100644
--- a/libavformat/oggdec.h
+++ b/libavformat/oggdec.h
@@ -160,6 +160,20 @@ int ff_vorbis_comment(AVFormatContext *ms, AVDictionary 
**m,
 int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st,
                              const uint8_t *buf, int size);
 
+/**
+ * Parse Vorbis comments, add metadata to an AVStream
+ *
+ * This function also attaches the metadata to the next decoded
+ * packet as AV_PKT_DATA_METADATA_UPDATE
+ *
+ * @note  The buffer will be temporarily modifed by this function,
+ *        so it needs to be writable. Furthermore it must be padded
+ *        by a single byte (not counted in size).
+ *        All changes will have been reverted upon return.
+ */
+int ff_vorbis_update_metadata(AVFormatContext *s, AVStream *st,
+                              const uint8_t *buf, int size);
+
 static inline int
 ogg_find_stream (struct ogg * ogg, int serial)
 {
diff --git a/libavformat/oggparsevorbis.c b/libavformat/oggparsevorbis.c
index 7e812846fe..7b7c76a3e0 100644
--- a/libavformat/oggparsevorbis.c
+++ b/libavformat/oggparsevorbis.c
@@ -263,20 +263,16 @@ static void vorbis_cleanup(AVFormatContext *s, int idx)
     }
 }
 
-static int vorbis_update_metadata(AVFormatContext *s, int idx)
+int ff_vorbis_update_metadata(AVFormatContext *s, AVStream *st,
+                              const uint8_t *buf, int size)
 {
     struct ogg *ogg = s->priv_data;
-    struct ogg_stream *os = ogg->streams + idx;
-    AVStream *st = s->streams[idx];
+    struct ogg_stream *os = ogg->streams + st->index;
     int ret;
 
-    if (os->psize <= 8)
-        return 0;
-
     /* New metadata packet; release old data. */
     av_dict_free(&st->metadata);
-    ret = ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 7,
-                                   os->psize - 8);
+    ret = ff_vorbis_stream_comment(s, st, buf, size);
     if (ret < 0)
         return ret;
 
@@ -349,6 +345,19 @@ static int vorbis_parse_header(AVFormatContext *s, 
AVStream *st,
     return 1;
 }
 
+static int vorbis_update_metadata(AVFormatContext *s, int idx)
+{
+    struct ogg *ogg = s->priv_data;
+    struct ogg_stream *os = ogg->streams + idx;
+    AVStream *st = s->streams[idx];
+
+    if (os->psize <= 8)
+        return 0;
+
+    return ff_vorbis_update_metadata(s, st, os->buf + os->pstart + 7,
+                                     os->psize - 8);
+}
+
 static int vorbis_header(AVFormatContext *s, int idx)
 {
     struct ogg *ogg = s->priv_data;
-- 
2.39.5 (Apple Git-154)

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