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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2013-02-17 14:52:24 -0800 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-02-18 01:21:23 +0100 |
| commit | c63f9fb37a7b7da03bed6d79115f7f2e36607808 (patch) | |
| tree | f405ac2af54069fd224ea5a06c071a023869efff /libavcodec/h264_cabac.c | |
| parent | 54b2bddd22fb32a67038848b8d2394bee671b143 (diff) | |
| download | ffmpeg-c63f9fb37a7b7da03bed6d79115f7f2e36607808.tar.gz | |
h264: don't store intra pcm samples in h->mb.
Instead, keep them in the bitstream buffer until we read them verbatim,
this saves a memcpy() and a subsequent clearing of the target buffer.
decode_cabac+decode_mb for a sample file (CAPM3_Sony_D.jsv) goes from
6121.4 to 6095.5 cycles, i.e. 26 cycles faster.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/h264_cabac.c')
| -rw-r--r-- | libavcodec/h264_cabac.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/h264_cabac.c b/libavcodec/h264_cabac.c index f073b7bcf2..7709c17a67 100644 --- a/libavcodec/h264_cabac.c +++ b/libavcodec/h264_cabac.c @@ -2004,7 +2004,8 @@ decode_intra_mb: // The pixels are stored in the same order as levels in h->mb array. if ((int) (h->cabac.bytestream_end - ptr) < mb_size) return -1; - memcpy(h->mb, ptr, mb_size); ptr+=mb_size; + h->intra_pcm_ptr = ptr; + ptr += mb_size; ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr); |