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| author | Andreas Rheinhardt <andreas.rheinhardt@googlemail.com> | 2018-11-21 19:34:29 +0100 |
|---|---|---|
| committer | Mark Thompson <sw@jkqxz.net> | 2018-11-22 23:19:17 +0000 |
| commit | e895b800fe273d3445be52a4880ae0172c193bc0 (patch) | |
| tree | 0b758eccaeaa2c20508a1c7e05ccd0db38dace97 /libavcodec/h2645_parse.h | |
| parent | 97d1ee437bbf67d7e3897bc73df4f7d9771ac309 (diff) | |
| download | ffmpeg-e895b800fe273d3445be52a4880ae0172c193bc0.tar.gz | |
cbs_h2645: Avoid memcpy when splitting fragment
Now memcpy is avoided for NAL units that don't contain 0x03 escape
characters.
Improves performance of cbs_h2645_fragment_add_nals from 36940
decicycles to 6364 decicycles based on 8 runs with a 5.1 Mb/s H.264
sample (262144 runs each).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@googlemail.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>
Diffstat (limited to 'libavcodec/h2645_parse.h')
| -rw-r--r-- | libavcodec/h2645_parse.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/h2645_parse.h b/libavcodec/h2645_parse.h index 2e29ad26cb..6dbba8fe4a 100644 --- a/libavcodec/h2645_parse.h +++ b/libavcodec/h2645_parse.h @@ -86,6 +86,12 @@ int ff_h2645_extract_rbsp(const uint8_t *src, int length, H2645RBSP *rbsp, /** * Split an input packet into NAL units. + * + * If data == raw_data holds true for a NAL unit of the returned pkt, then + * said NAL unit does not contain any emulation_prevention_three_byte and + * the data is contained in the input buffer pointed to by buf. + * Otherwise, the unescaped data is part of the rbsp_buffer described by the + * packet's H2645RBSP. */ int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length, void *logctx, int is_nalff, int nal_length_size, |