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avcodec/bsf: Add ff_bsf_get_packet_ref() function 

Use of this function can save unnecessary malloc operation
in bitstream filter.

Signed-off-by: Jan Sebechlebsky <sebechlebskyjan@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Jan Sebechlebsky 2016-07-28 18:18:13 +02:00 committed by Luca Barbato
parent 21733b39d0
commit 87d5686151
2 changed files with 27 additions and 0 deletions
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16
libavcodec/bsf.c
View File

@ -227,3 +227,19 @@ int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt)
return 0;
}
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
{
AVBSFInternal *in = ctx->internal;
if (in->eof)
return AVERROR_EOF;
if (!ctx->internal->buffer_pkt->data &&
!ctx->internal->buffer_pkt->side_data_elems)
return AVERROR(EAGAIN);
av_packet_move_ref(pkt, ctx->internal->buffer_pkt);
return 0;
}

11
libavcodec/bsf.h
View File

@ -28,6 +28,17 @@
*/
int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt);
/**
* Called by bitstream filters to get packet for filtering.
* The reference to packet is moved to provided packet structure.
*
* @param ctx pointer to AVBSFContext of filter
* @param pkt pointer to packet to move reference to
*
* @return 0>= on success, negative AVERROR in case of failure
*/
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt);
const AVClass *ff_bsf_child_class_next(const AVClass *prev);
#endif /* AVCODEC_BSF_H */