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Diffstat (limited to 'libavcodec/ppc/fft_vsx.c')
| -rw-r--r-- | libavcodec/ppc/fft_vsx.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/libavcodec/ppc/fft_vsx.c b/libavcodec/ppc/fft_vsx.c new file mode 100644 index 0000000..e92975f --- /dev/null +++ b/libavcodec/ppc/fft_vsx.c @@ -0,0 +1,227 @@ +/* + * FFT transform, optimized with VSX built-in functions + * Copyright (c) 2014 Rong Yan + * + * This algorithm (though not any of the implementation details) is + * based on libdjbfft by D. J. Bernstein. + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + + +#include "config.h" +#include "libavutil/cpu.h" +#include "libavutil/ppc/types_altivec.h" +#include "libavutil/ppc/util_altivec.h" +#include "libavcodec/fft.h" +#include "libavcodec/fft-internal.h" +#include "fft_vsx.h" + +#if HAVE_VSX + +static void fft32_vsx_interleave(FFTComplex *z) +{ + fft16_vsx_interleave(z); + fft8_vsx_interleave(z+16); + fft8_vsx_interleave(z+24); + pass_vsx_interleave(z,ff_cos_32,4); +} + +static void fft64_vsx_interleave(FFTComplex *z) +{ + fft32_vsx_interleave(z); + fft16_vsx_interleave(z+32); + fft16_vsx_interleave(z+48); + pass_vsx_interleave(z,ff_cos_64, 8); +} +static void fft128_vsx_interleave(FFTComplex *z) +{ + fft64_vsx_interleave(z); + fft32_vsx_interleave(z+64); + fft32_vsx_interleave(z+96); + pass_vsx_interleave(z,ff_cos_128,16); +} +static void fft256_vsx_interleave(FFTComplex *z) +{ + fft128_vsx_interleave(z); + fft64_vsx_interleave(z+128); + fft64_vsx_interleave(z+192); + pass_vsx_interleave(z,ff_cos_256,32); +} +static void fft512_vsx_interleave(FFTComplex *z) +{ + fft256_vsx_interleave(z); + fft128_vsx_interleave(z+256); + fft128_vsx_interleave(z+384); + pass_vsx_interleave(z,ff_cos_512,64); +} +static void fft1024_vsx_interleave(FFTComplex *z) +{ + fft512_vsx_interleave(z); + fft256_vsx_interleave(z+512); + fft256_vsx_interleave(z+768); + pass_vsx_interleave(z,ff_cos_1024,128); + +} +static void fft2048_vsx_interleave(FFTComplex *z) +{ + fft1024_vsx_interleave(z); + fft512_vsx_interleave(z+1024); + fft512_vsx_interleave(z+1536); + pass_vsx_interleave(z,ff_cos_2048,256); +} +static void fft4096_vsx_interleave(FFTComplex *z) +{ + fft2048_vsx_interleave(z); + fft1024_vsx_interleave(z+2048); + fft1024_vsx_interleave(z+3072); + pass_vsx_interleave(z,ff_cos_4096, 512); +} +static void fft8192_vsx_interleave(FFTComplex *z) +{ + fft4096_vsx_interleave(z); + fft2048_vsx_interleave(z+4096); + fft2048_vsx_interleave(z+6144); + pass_vsx_interleave(z,ff_cos_8192,1024); +} +static void fft16384_vsx_interleave(FFTComplex *z) +{ + fft8192_vsx_interleave(z); + fft4096_vsx_interleave(z+8192); + fft4096_vsx_interleave(z+12288); + pass_vsx_interleave(z,ff_cos_16384,2048); +} +static void fft32768_vsx_interleave(FFTComplex *z) +{ + fft16384_vsx_interleave(z); + fft8192_vsx_interleave(z+16384); + fft8192_vsx_interleave(z+24576); + pass_vsx_interleave(z,ff_cos_32768,4096); +} +static void fft65536_vsx_interleave(FFTComplex *z) +{ + fft32768_vsx_interleave(z); + fft16384_vsx_interleave(z+32768); + fft16384_vsx_interleave(z+49152); + pass_vsx_interleave(z,ff_cos_65536,8192); +} + +static void fft32_vsx(FFTComplex *z) +{ + fft16_vsx(z); + fft8_vsx(z+16); + fft8_vsx(z+24); + pass_vsx(z,ff_cos_32,4); +} + +static void fft64_vsx(FFTComplex *z) +{ + fft32_vsx(z); + fft16_vsx(z+32); + fft16_vsx(z+48); + pass_vsx(z,ff_cos_64, 8); +} +static void fft128_vsx(FFTComplex *z) +{ + fft64_vsx(z); + fft32_vsx(z+64); + fft32_vsx(z+96); + pass_vsx(z,ff_cos_128,16); +} +static void fft256_vsx(FFTComplex *z) +{ + fft128_vsx(z); + fft64_vsx(z+128); + fft64_vsx(z+192); + pass_vsx(z,ff_cos_256,32); +} +static void fft512_vsx(FFTComplex *z) +{ + fft256_vsx(z); + fft128_vsx(z+256); + fft128_vsx(z+384); + pass_vsx(z,ff_cos_512,64); +} +static void fft1024_vsx(FFTComplex *z) +{ + fft512_vsx(z); + fft256_vsx(z+512); + fft256_vsx(z+768); + pass_vsx(z,ff_cos_1024,128); + +} +static void fft2048_vsx(FFTComplex *z) +{ + fft1024_vsx(z); + fft512_vsx(z+1024); + fft512_vsx(z+1536); + pass_vsx(z,ff_cos_2048,256); +} +static void fft4096_vsx(FFTComplex *z) +{ + fft2048_vsx(z); + fft1024_vsx(z+2048); + fft1024_vsx(z+3072); + pass_vsx(z,ff_cos_4096, 512); +} +static void fft8192_vsx(FFTComplex *z) +{ + fft4096_vsx(z); + fft2048_vsx(z+4096); + fft2048_vsx(z+6144); + pass_vsx(z,ff_cos_8192,1024); +} +static void fft16384_vsx(FFTComplex *z) +{ + fft8192_vsx(z); + fft4096_vsx(z+8192); + fft4096_vsx(z+12288); + pass_vsx(z,ff_cos_16384,2048); +} +static void fft32768_vsx(FFTComplex *z) +{ + fft16384_vsx(z); + fft8192_vsx(z+16384); + fft8192_vsx(z+24576); + pass_vsx(z,ff_cos_32768,4096); +} +static void fft65536_vsx(FFTComplex *z) +{ + fft32768_vsx(z); + fft16384_vsx(z+32768); + fft16384_vsx(z+49152); + pass_vsx(z,ff_cos_65536,8192); +} + +static void (* const fft_dispatch_vsx[])(FFTComplex*) = { + fft4_vsx, fft8_vsx, fft16_vsx, fft32_vsx, fft64_vsx, fft128_vsx, fft256_vsx, fft512_vsx, fft1024_vsx, + fft2048_vsx, fft4096_vsx, fft8192_vsx, fft16384_vsx, fft32768_vsx, fft65536_vsx, +}; +static void (* const fft_dispatch_vsx_interleave[])(FFTComplex*) = { + fft4_vsx_interleave, fft8_vsx_interleave, fft16_vsx_interleave, fft32_vsx_interleave, fft64_vsx_interleave, + fft128_vsx_interleave, fft256_vsx_interleave, fft512_vsx_interleave, fft1024_vsx_interleave, + fft2048_vsx_interleave, fft4096_vsx_interleave, fft8192_vsx_interleave, fft16384_vsx_interleave, fft32768_vsx_interleave, fft65536_vsx_interleave, +}; +void ff_fft_calc_interleave_vsx(FFTContext *s, FFTComplex *z) +{ + fft_dispatch_vsx_interleave[s->nbits-2](z); +} +void ff_fft_calc_vsx(FFTContext *s, FFTComplex *z) +{ + fft_dispatch_vsx[s->nbits-2](z); +} +#endif /* HAVE_VSX */ |
