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Side by Side Diff: patched-ffmpeg-mt/libavcodec/ppc/fft_altivec.c

Issue 789004: ffmpeg roll of source to mar 9 version... (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/ffmpeg/
Patch Set: '' Created 10 years, 9 months ago
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1 /* 1 /*
2 * FFT/IFFT transforms 2 * FFT/IFFT transforms
3 * AltiVec-enabled 3 * AltiVec-enabled
4 * Copyright (c) 2003 Romain Dolbeau <romain@dolbeau.org> 4 * Copyright (c) 2003 Romain Dolbeau <romain@dolbeau.org>
5 * Based on code Copyright (c) 2002 Fabrice Bellard 5 * Based on code Copyright (c) 2002 Fabrice Bellard
6 * 6 *
7 * This file is part of FFmpeg. 7 * This file is part of FFmpeg.
8 * 8 *
9 * FFmpeg is free software; you can redistribute it and/or 9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public 10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either 11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version. 12 * version 2.1 of the License, or (at your option) any later version.
13 * 13 *
14 * FFmpeg is distributed in the hope that it will be useful, 14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details. 17 * Lesser General Public License for more details.
18 * 18 *
19 * You should have received a copy of the GNU Lesser General Public 19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software 20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */ 22 */
23 #include "libavcodec/dsputil.h" 23 #include "libavcodec/fft.h"
24 #include "dsputil_ppc.h" 24 #include "dsputil_ppc.h"
25 #include "util_altivec.h" 25 #include "util_altivec.h"
26 #include "dsputil_altivec.h"
27
26 /** 28 /**
27 * Do a complex FFT with the parameters defined in ff_fft_init(). The 29 * Do a complex FFT with the parameters defined in ff_fft_init(). The
28 * input data must be permuted before with s->revtab table. No 30 * input data must be permuted before with s->revtab table. No
29 * 1.0/sqrt(n) normalization is done. 31 * 1.0/sqrt(n) normalization is done.
30 * AltiVec-enabled 32 * AltiVec-enabled
31 * This code assumes that the 'z' pointer is 16 bytes-aligned 33 * This code assumes that the 'z' pointer is 16 bytes-aligned
32 * It also assumes all FFTComplex are 8 bytes-aligned pair of float 34 * It also assumes all FFTComplex are 8 bytes-aligned pair of float
33 * The code is exactly the same as the SSE version, except 35 * The code is exactly the same as the SSE version, except
34 * that successive MUL + ADD/SUB have been merged into 36 * that successive MUL + ADD/SUB have been merged into
35 * fused multiply-add ('vec_madd' in altivec) 37 * fused multiply-add ('vec_madd' in altivec)
36 */ 38 */
37 void ff_fft_calc_altivec(FFTContext *s, FFTComplex *z) 39 static void ff_fft_calc_altivec(FFTContext *s, FFTComplex *z)
38 { 40 {
39 POWERPC_PERF_DECLARE(altivec_fft_num, s->nbits >= 6); 41 POWERPC_PERF_DECLARE(altivec_fft_num, s->nbits >= 6);
40 register const vector float vczero = (const vector float)vec_splat_u32(0.); 42 register const vector float vczero = (const vector float)vec_splat_u32(0.);
41 43
42 int ln = s->nbits; 44 int ln = s->nbits;
43 int j, np, np2; 45 int j, np, np2;
44 int nblocks, nloops; 46 int nblocks, nloops;
45 register FFTComplex *p, *q; 47 register FFTComplex *p, *q;
46 FFTComplex *cptr, *cptr1; 48 FFTComplex *cptr, *cptr1;
47 int k; 49 int k;
(...skipping 84 matching lines...) Expand 10 before | Expand all | Expand 10 after
132 } while (nblocks != 0); 134 } while (nblocks != 0);
133 135
134 POWERPC_PERF_STOP_COUNT(altivec_fft_num, s->nbits >= 6); 136 POWERPC_PERF_STOP_COUNT(altivec_fft_num, s->nbits >= 6);
135 } 137 }
136 138
137 av_cold void ff_fft_init_altivec(FFTContext *s) 139 av_cold void ff_fft_init_altivec(FFTContext *s)
138 { 140 {
139 s->fft_calc = ff_fft_calc_altivec; 141 s->fft_calc = ff_fft_calc_altivec;
140 s->split_radix = 0; 142 s->split_radix = 0;
141 } 143 }
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