[FFmpeg-cvslog] avcodec/packet: Improve documentation of av_packet_get_side_data

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sun Jun 21 06:40:19 2020 +0200| [45ddf06f54915bfcfb6bdfa8b983f4fdbf7bf4dc] | committer: Andreas Rheinhardt

avcodec/packet: Improve documentation of av_packet_get_side_data

Document that it also sets the size in case the desired side data is
absent (if the pointer has been supplied).

Reviewed-by: Anton Khirnov <anton at khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=45ddf06f54915bfcfb6bdfa8b983f4fdbf7bf4dc
---

 libavcodec/packet.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/packet.h b/libavcodec/packet.h
index 41485f4527..96f237f091 100644
--- a/libavcodec/packet.h
+++ b/libavcodec/packet.h
@@ -580,7 +580,8 @@ int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
  *
  * @param pkt packet
  * @param type desired side information type
- * @param size pointer for side information size to store (optional)
+ * @param size If supplied, *size will be set to the size of the side data
+ *             or to zero if the desired side data is not present.
  * @return pointer to data if present or NULL otherwise
  */
 uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,