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| author | Yunqing Wang <yunqingwang@google.com> | 2013-02-26 16:27:41 -0800 |
|---|---|---|
| committer | Yunqing Wang <yunqingwang@google.com> | 2013-02-26 17:16:13 -0800 |
| commit | 35bc02c6eb22602997d9c8aebeb46ef588266cc4 (patch) | |
| tree | 54ab06054f3f5bcef8f214b00fe448c4da19af46 /vp9/decoder/vp9_idct_blk.c | |
| parent | 9770d564f4984e6a0d3cfdfb7e5b8bc83f52dccf (diff) | |
| download | libvpx-35bc02c6eb22602997d9c8aebeb46ef588266cc4.tar libvpx-35bc02c6eb22602997d9c8aebeb46ef588266cc4.tar.gz libvpx-35bc02c6eb22602997d9c8aebeb46ef588266cc4.tar.bz2 libvpx-35bc02c6eb22602997d9c8aebeb46ef588266cc4.zip | |
Optimize vp9_dc_only_idct_add_c function
Wrote SSE2 version of vp9_dc_only_idct_add_c function. In order to
improve performance, clipped the absolute diff values to [0, 255].
This allowed us to keep the additions/subtractions in 8 bits.
Test showed an over 2% decoder performance increase.
Change-Id: Ie1a236d23d207e4ffcd1fc9f3d77462a9c7fe09d
Diffstat (limited to 'vp9/decoder/vp9_idct_blk.c')
| -rw-r--r-- | vp9/decoder/vp9_idct_blk.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/vp9/decoder/vp9_idct_blk.c b/vp9/decoder/vp9_idct_blk.c index 6e55e45ae..50d874470 100644 --- a/vp9/decoder/vp9_idct_blk.c +++ b/vp9/decoder/vp9_idct_blk.c @@ -47,7 +47,7 @@ void vp9_dequant_idct_add_y_block_c(int16_t *q, const int16_t *dq, if (xd->block[i * 4 + j].eob > 1) vp9_dequant_idct_add_c(q, dq, pre, dst, 16, stride); else { - vp9_dc_only_idct_add_c(q[0]*dq[0], pre, dst, 16, stride); + vp9_dc_only_idct_add(q[0]*dq[0], pre, dst, 16, stride); ((int *)q)[0] = 0; } @@ -72,7 +72,7 @@ void vp9_dequant_idct_add_uv_block_c(int16_t *q, const int16_t *dq, if (xd->block[16 + i * 2 + j].eob > 1) vp9_dequant_idct_add_c(q, dq, pre, dstu, 8, stride); else { - vp9_dc_only_idct_add_c(q[0]*dq[0], pre, dstu, 8, stride); + vp9_dc_only_idct_add(q[0]*dq[0], pre, dstu, 8, stride); ((int *)q)[0] = 0; } @@ -90,7 +90,7 @@ void vp9_dequant_idct_add_uv_block_c(int16_t *q, const int16_t *dq, if (xd->block[20 + i * 2 + j].eob > 1) vp9_dequant_idct_add_c(q, dq, pre, dstv, 8, stride); else { - vp9_dc_only_idct_add_c(q[0]*dq[0], pre, dstv, 8, stride); + vp9_dc_only_idct_add(q[0]*dq[0], pre, dstv, 8, stride); ((int *)q)[0] = 0; } |