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avcodec/bsf: Use null-bsf for passthrough when available

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When an empty list bsf is used for passthrough, there is a check
for every packet in bsf_list_filter() before ff_bsf_get_packet_ref()
is called. Directly using the null bsf avoids that.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-09-06 19:39:19 +02:00
parent b2793a9462
commit b99fb4df42
1 changed files with 7 additions and 0 deletions
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7
libavcodec/bsf.c
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@ -18,6 +18,8 @@
#include <string.h>
#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
@ -544,5 +546,10 @@ end:
int av_bsf_get_null_filter(AVBSFContext **bsf)
{
#if CONFIG_NULL_BSF
extern const AVBitStreamFilter ff_null_bsf;
return av_bsf_alloc(&ff_null_bsf, bsf);
#else
return av_bsf_alloc(&list_bsf, bsf);
#endif
}