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| author | Rostislav Pehlivanov <atomnuker@gmail.com> | 2017-06-18 12:06:30 +0100 |
|---|---|---|
| committer | Rostislav Pehlivanov <atomnuker@gmail.com> | 2017-06-23 23:45:37 +0100 |
| commit | e1120b1c5446acec1ad9567c884fb6655a34c359 (patch) | |
| tree | 6de0abf6956594dd953f89436a632337b48d20a7 /libavcodec/mdct15.h | |
| parent | f66086adac5eb9b964c89ea0480487f48875f690 (diff) | |
| download | ffmpeg-e1120b1c5446acec1ad9567c884fb6655a34c359.tar.gz | |
mdct15: add assembly optimizations for the 15-point FFT
c: 1802 decicycles in fft15,16774635 runs, 2581 skips
avx: 865 decicycles in fft15,16776378 runs, 838 skips
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Diffstat (limited to 'libavcodec/mdct15.h')
| -rw-r--r-- | libavcodec/mdct15.h | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/libavcodec/mdct15.h b/libavcodec/mdct15.h index ef94edff6c..7d83f3ebdf 100644 --- a/libavcodec/mdct15.h +++ b/libavcodec/mdct15.h @@ -34,34 +34,26 @@ typedef struct MDCT15Context { int *pfa_postreindex; FFTContext ptwo_fft; - FFTComplex *tmp; - FFTComplex *twiddle_exptab; - /* 0 - 18: fft15 twiddles, 19 - 20: fft5 twiddles */ - FFTComplex exptab[21]; + DECLARE_ALIGNED(32, FFTComplex, exptab)[64]; - /** - * Calculate a full 2N -> N MDCT - */ + /* 15-point FFT */ + void (*fft15)(FFTComplex *out, FFTComplex *in, FFTComplex *exptab, ptrdiff_t stride); + + /* Calculate a full 2N -> N MDCT */ void (*mdct)(struct MDCT15Context *s, float *dst, const float *src, ptrdiff_t stride); - /** - * Calculate the middle half of the iMDCT - */ + /* Calculate the middle half of the iMDCT */ void (*imdct_half)(struct MDCT15Context *s, float *dst, const float *src, ptrdiff_t src_stride, float scale); } MDCT15Context; -/** - * Init an (i)MDCT of the length 2 * 15 * (2^N) - */ +/* Init an (i)MDCT of the length 2 * 15 * (2^N) */ int ff_mdct15_init(MDCT15Context **ps, int inverse, int N, double scale); - -/** - * Frees a context - */ void ff_mdct15_uninit(MDCT15Context **ps); +void ff_mdct15_init_x86(MDCT15Context *s); + #endif /* AVCODEC_MDCT15_H */ |