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Side by Side Diff: patched-ffmpeg-mt/libavcodec/costablegen.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 * Generate a header file for hardcoded ff_cos_* tables 2 * Generate a header file for hardcoded ff_cos_* tables
3 * 3 *
4 * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de> 4 * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
5 * 5 *
6 * This file is part of FFmpeg. 6 * This file is part of FFmpeg.
7 * 7 *
8 * FFmpeg is free software; you can redistribute it and/or 8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public 9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either 10 * License as published by the Free Software Foundation; either
(...skipping 19 matching lines...) Expand all
30 #define BITS 16 30 #define BITS 16
31 #define FLOATFMT "%.18e" 31 #define FLOATFMT "%.18e"
32 32
33 int main(int argc, char *argv[]) 33 int main(int argc, char *argv[])
34 { 34 {
35 int i, j; 35 int i, j;
36 int do_sin = argc == 2 && !strcmp(argv[1], "sin"); 36 int do_sin = argc == 2 && !strcmp(argv[1], "sin");
37 double (*func)(double) = do_sin ? sin : cos; 37 double (*func)(double) = do_sin ? sin : cos;
38 38
39 printf("/* This file was generated by libavcodec/costablegen */\n"); 39 printf("/* This file was generated by libavcodec/costablegen */\n");
40 printf("#include \"libavcodec/dsputil.h\"\n"); 40 printf("#include \"libavcodec/fft.h\"\n");
41 for (i = 4; i <= BITS; i++) { 41 for (i = 4; i <= BITS; i++) {
42 int m = 1 << i; 42 int m = 1 << i;
43 double freq = 2*M_PI/m; 43 double freq = 2*M_PI/m;
44 printf("%s(%i) = {\n ", do_sin ? "SINTABLE" : "COSTABLE", m); 44 printf("%s(%i) = {\n ", do_sin ? "SINTABLE" : "COSTABLE", m);
45 for (j = 0; j < m/2 - 1; j++) { 45 for (j = 0; j < m/2 - 1; j++) {
46 int idx = j > m/4 ? m/2 - j : j; 46 int idx = j > m/4 ? m/2 - j : j;
47 if (do_sin && j >= m/4) 47 if (do_sin && j >= m/4)
48 idx = m/4 - j; 48 idx = m/4 - j;
49 printf(" "FLOATFMT",", func(idx*freq)); 49 printf(" "FLOATFMT",", func(idx*freq));
50 if ((j & 3) == 3) 50 if ((j & 3) == 3)
51 printf("\n "); 51 printf("\n ");
52 } 52 }
53 printf(" "FLOATFMT"\n};\n", func(do_sin ? -(m/4 - 1)*freq : freq)); 53 printf(" "FLOATFMT"\n};\n", func(do_sin ? -(m/4 - 1)*freq : freq));
54 } 54 }
55 return 0; 55 return 0;
56 } 56 }
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