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h264: remove clear_blocks call in threading init.

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Init code in that if statement goes down from 26716 cycles to 26047
cycles, i.e. the removal of the clear_blocks and smaller memcpy()
together save around 670 cycles.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Ronald S. Bultje 2013-02-11 18:08:45 -08:00 committed by Michael Niedermayer
parent c230af9bcc
commit faf8eca08d
1 changed files with 3 additions and 4 deletions
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7
libavcodec/h264.c
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@ -1253,7 +1253,9 @@ static int decode_update_thread_context(AVCodecContext *dst,
// copy all fields after MpegEnc // copy all fields after MpegEnc
memcpy(&h->s + 1, &h1->s + 1, memcpy(&h->s + 1, &h1->s + 1,
sizeof(H264Context) - sizeof(MpegEncContext)); offsetof(H264Context, intra_gb) - sizeof(MpegEncContext));
memcpy(&h->cabac, &h1->cabac,
sizeof(H264Context) - offsetof(H264Context, cabac));
memset(h->sps_buffers, 0, sizeof(h->sps_buffers)); memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
memset(h->pps_buffers, 0, sizeof(h->pps_buffers)); memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
@ -1273,9 +1275,6 @@ static int decode_update_thread_context(AVCodecContext *dst,
h->bipred_scratchpad = NULL; h->bipred_scratchpad = NULL;
h->thread_context[0] = h; h->thread_context[0] = h;
s->dsp.clear_blocks(h->mb);
s->dsp.clear_blocks(h->mb + (24 * 16 << h->pixel_shift));
} }
/* frame_start may not be called for the next thread (if it's decoding /* frame_start may not be called for the next thread (if it's decoding