diff options
| author | Rostislav Pehlivanov <atomnuker@gmail.com> | 2017-07-29 21:27:01 +0100 |
|---|---|---|
| committer | Rostislav Pehlivanov <atomnuker@gmail.com> | 2017-07-30 07:38:39 +0100 |
| commit | 70eb77b34e9f08cd5e431921a2792f31e4b5265c (patch) | |
| tree | dc163df43e5fa5c29176cc88a5ae261825c625af /libavcodec/x86/mdct15_init.c | |
| parent | b0c61209cd30f9ddf3356d5ded6df488f25d1bd5 (diff) | |
| download | ffmpeg-70eb77b34e9f08cd5e431921a2792f31e4b5265c.tar.gz | |
mdct15: add inverse transform postrotation SIMD
2.5ms frames:
Before (c): 2638 decicycles in postrotate, 2097040 runs, 112 skips
After (sse3): 1467 decicycles in postrotate, 2097083 runs, 69 skips
After (avx2): 1244 decicycles in postrotate, 2097085 runs, 67 skips
5ms frames:
Before (c): 4987 decicycles in postrotate, 1048371 runs, 205 skips
After (sse3): 2644 decicycles in postrotate, 1048509 runs, 67 skips
After (avx2): 2031 decicycles in postrotate, 1048523 runs, 53 skips
10ms frames:
Before (c): 9153 decicycles in postrotate, 523575 runs, 713 skips
After (sse3): 5110 decicycles in postrotate, 523726 runs, 562 skips
After (avx2): 3738 decicycles in postrotate, 524223 runs, 65 skips
20ms frames:
Before (c): 17857 decicycles in postrotate, 261866 runs, 278 skips
After (sse3): 10041 decicycles in postrotate, 261746 runs, 398 skips
After (avx2): 7050 decicycles in postrotate, 262116 runs, 28 skips
Improves total decoding performance for real world content by 9% with avx2.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Diffstat (limited to 'libavcodec/x86/mdct15_init.c')
| -rw-r--r-- | libavcodec/x86/mdct15_init.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libavcodec/x86/mdct15_init.c b/libavcodec/x86/mdct15_init.c index ba3d94c2ec..45b91b7e21 100644 --- a/libavcodec/x86/mdct15_init.c +++ b/libavcodec/x86/mdct15_init.c @@ -25,6 +25,9 @@ #include "libavutil/x86/cpu.h" #include "libavcodec/mdct15.h" +void ff_mdct15_postreindex_sse3(FFTComplex *out, FFTComplex *in, FFTComplex *exp, int *lut, ptrdiff_t len8); +void ff_mdct15_postreindex_avx2(FFTComplex *out, FFTComplex *in, FFTComplex *exp, int *lut, ptrdiff_t len8); + void ff_fft15_avx(FFTComplex *out, FFTComplex *in, FFTComplex *exptab, ptrdiff_t stride); static void perm_twiddles(MDCT15Context *s) @@ -85,11 +88,17 @@ av_cold void ff_mdct15_init_x86(MDCT15Context *s) int adjust_twiddles = 0; int cpu_flags = av_get_cpu_flags(); + if (EXTERNAL_SSE3(cpu_flags)) + s->postreindex = ff_mdct15_postreindex_sse3; + if (ARCH_X86_64 && EXTERNAL_AVX(cpu_flags)) { s->fft15 = ff_fft15_avx; adjust_twiddles = 1; } + if (ARCH_X86_64 && EXTERNAL_AVX2_FAST(cpu_flags)) + s->postreindex = ff_mdct15_postreindex_avx2; + if (adjust_twiddles) perm_twiddles(s); } |