matroskaenc: base DefaultDuration on the framerate, not the codec timebase
[libav.git] / tests / utils.c
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1/*
2 * This file is part of Libav.
3 *
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
be6009d3 19#include <errno.h>
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20#include <stdio.h>
21#include <stdlib.h>
be6009d3 22#include <string.h>
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23
24#define SCALEBITS 8
25#define ONE_HALF (1 << (SCALEBITS - 1))
26#define FIX(x) ((int) ((x) * (1L << SCALEBITS) + 0.5))
27
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28#define err_if(expr) do { \
29 if (expr) { \
30 fprintf(stderr, "%s\n", strerror(errno)); \
31 exit(1); \
32 } \
33} while (0)
34
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35static void rgb24_to_yuv420p(unsigned char *lum, unsigned char *cb,
36 unsigned char *cr, unsigned char *src,
37 int width, int height)
38{
39 int wrap, wrap3, x, y;
40 int r, g, b, r1, g1, b1;
41 unsigned char *p;
42
43 wrap = width;
44 wrap3 = width * 3;
45 p = src;
46 for (y = 0; y < height; y += 2) {
47 for (x = 0; x < width; x += 2) {
48 r = p[0];
49 g = p[1];
50 b = p[2];
51 r1 = r;
52 g1 = g;
53 b1 = b;
54 lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
55 FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
56 r = p[3];
57 g = p[4];
58 b = p[5];
59 r1 += r;
60 g1 += g;
61 b1 += b;
62 lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
63 FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
64 p += wrap3;
65 lum += wrap;
66
67 r = p[0];
68 g = p[1];
69 b = p[2];
70 r1 += r;
71 g1 += g;
72 b1 += b;
73 lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
74 FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
75 r = p[3];
76 g = p[4];
77 b = p[5];
78 r1 += r;
79 g1 += g;
80 b1 += b;
81 lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
82 FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
83
84 cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
85 FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
86 cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
87 FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
88
89 cb++;
90 cr++;
91 p += -wrap3 + 2 * 3;
92 lum += -wrap + 2;
93 }
94 p += wrap3;
95 lum += wrap;
96 }
97}
98
99/* cif format */
100#define DEFAULT_WIDTH 352
101#define DEFAULT_HEIGHT 288
102#define DEFAULT_NB_PICT 50
103
104static void pgmyuv_save(const char *filename, int w, int h,
105 unsigned char *rgb_tab)
106{
107 FILE *f;
108 int i, h2, w2;
109 unsigned char *cb, *cr;
110 unsigned char *lum_tab, *cb_tab, *cr_tab;
111
112 lum_tab = malloc(w * h);
113 cb_tab = malloc(w * h / 4);
114 cr_tab = malloc(w * h / 4);
115
116 rgb24_to_yuv420p(lum_tab, cb_tab, cr_tab, rgb_tab, w, h);
117
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118 if (filename) {
119 f = fopen(filename, "wb");
120 fprintf(f, "P5\n%d %d\n%d\n", w, h * 3 / 2, 255);
121 } else {
122 f = stdout;
123 }
124
be6009d3 125 err_if(fwrite(lum_tab, 1, w * h, f) != w * h);
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126 h2 = h / 2;
127 w2 = w / 2;
128 cb = cb_tab;
129 cr = cr_tab;
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130
131 if (filename) {
132 for (i = 0; i < h2; i++) {
133 err_if(fwrite(cb, 1, w2, f) != w2);
134 err_if(fwrite(cr, 1, w2, f) != w2);
135 cb += w2;
136 cr += w2;
137 }
138 fclose(f);
139 } else {
140 for (i = 0; i < h2; i++) {
141 err_if(fwrite(cb, 1, w2, f) != w2);
142 cb += w2;
143 }
144 for (i = 0; i < h2; i++) {
145 err_if(fwrite(cr, 1, w2, f) != w2);
146 cr += w2;
147 }
f0ccd53a 148 }
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149
150 free(lum_tab);
151 free(cb_tab);
152 free(cr_tab);
153}
154
155static unsigned char *rgb_tab;
156static int width, height, wrap;
157
158static void put_pixel(int x, int y, int r, int g, int b)
159{
160 unsigned char *p;
161
162 if (x < 0 || x >= width ||
163 y < 0 || y >= height)
164 return;
165
166 p = rgb_tab + y * wrap + x * 3;
167 p[0] = r;
168 p[1] = g;
169 p[2] = b;
170}