| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | x86/opusdps: clear the high bits from some gprs | James Almer | 2019-09-11 | 1 | -3/+4 |
| | | | | | | | | Fixes checkasm on systems like win64. Reviewed-by: Lynne Signed-off-by: James Almer <jamrial@gmail.com> | ||||
| * | x86/opusdsp: replace loads with shuffles | Lynne | 2019-04-26 | 1 | -6/+3 |
| | | | | | | | | | Has a slight speedup. Can't be carried over to aarch64, since it has no shufps-like instruction. Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com> | ||||
| * | x86/opusdsp: fix WIN64 return value | Lynne | 2019-04-01 | 1 | -3/+2 |
| | | | | | Signed-off-by: James Almer <jamrial@gmail.com> | ||||
| * | x86/opusdsp: implement FMA3 accelerated postfilter and deemphasis | Lynne | 2019-04-01 | 1 | -0/+114 |
| 58893 decicycles in deemphasis_c, 130548 runs, 524 skips 9475 decicycles in deemphasis_fma3, 130686 runs, 386 skips -> 6.21x speedup 24866 decicycles in postfilter_c, 65386 runs, 150 skips 5268 decicycles in postfilter_fma3, 65505 runs, 31 skips -> 4.72x speedup Total decoder speedup: ~14% Deemphasis SIMD based on the following unrolling: const float c1 = CELT_EMPH_COEFF, c2 = c1*c1, c3 = c2*c1, c4 = c3*c1; float state = coeff; for (int i = 0; i < len; i += 4) { y[0] = x[0] + c1*state; y[1] = x[1] + c2*state + c1*x[0]; y[2] = x[2] + c3*state + c1*x[1] + c2*x[0]; y[3] = x[3] + c4*state + c1*x[2] + c2*x[1] + c3*x[0]; state = y[3]; y += 4; x += 4; } | |||||
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index : delta/ffmpeg.git | |
| git.ffmpeg.org: ffmpeg.git |
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