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avcodec/packet: Improve documentation of av_packet_get_side_data

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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@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-06-21 06:40:19 +02:00
parent b054a3a216
commit 45ddf06f54
1 changed files with 2 additions and 1 deletions
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libavcodec/packet.h
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@ -580,7 +580,8 @@ int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
* *
* @param pkt packet * @param pkt packet
* @param type desired side information type * @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 * @return pointer to data if present or NULL otherwise
*/ */
uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,