build: Drop leftover .exp pattern from LIBSUFFIXES list.
[libav.git] / tests / rotozoom.c
CommitLineData
66961636 1/*
58c42af7 2 * Generate a synthetic YUV video sequence suitable for codec testing.
01d193aa
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3 *
4 * copyright (c) Sebastien Bechet <s.bechet@av7.net>
5 *
2912e87a 6 * This file is part of Libav.
01d193aa 7 *
2912e87a 8 * Libav is free software; you can redistribute it and/or
01d193aa
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9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
2912e87a 13 * Libav is distributed in the hope that it will be useful,
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
2912e87a 19 * License along with Libav; if not, write to the Free Software
01d193aa 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
66961636 21 */
01d193aa 22
66961636
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23#include <stdlib.h>
24#include <stdio.h>
6afd3b92
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25#include <inttypes.h>
26
f628559d 27#define FIXP (1 << 16)
b481bbc3 28#define MY_PI 205887 // (M_PI * FIX)
6afd3b92 29
f628559d
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30static int64_t int_pow(int64_t a, int p)
31{
32 int64_t v = FIXP;
6afd3b92 33
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34 for (; p; p--) {
35 v *= a;
36 v /= FIXP;
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37 }
38
39 return v;
40}
41
f628559d
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42static int64_t int_sin(int64_t a)
43{
44 if (a < 0)
45 a = MY_PI - a; // 0..inf
46 a %= 2 * MY_PI; // 0..2PI
6afd3b92 47
f628559d
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48 if (a >= MY_PI * 3 / 2)
49 a -= 2 * MY_PI; // -PI / 2 .. 3PI / 2
b481bbc3 50 if (a >= MY_PI / 2)
f628559d 51 a = MY_PI - a; // -PI / 2 .. PI / 2
115329f1 52
f628559d 53 return a - int_pow(a, 3) / 6 + int_pow(a, 5) / 120 - int_pow(a, 7) / 5040;
6afd3b92 54}
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55
56#define SCALEBITS 8
57#define ONE_HALF (1 << (SCALEBITS - 1))
f628559d 58#define FIX(x) ((int) ((x) * (1L << SCALEBITS) + 0.5))
66961636 59
5a37c12c
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60static void rgb24_to_yuv420p(unsigned char *lum, unsigned char *cb,
61 unsigned char *cr, unsigned char *src,
62 int width, int height)
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63{
64 int wrap, wrap3, x, y;
65 int r, g, b, r1, g1, b1;
5a37c12c 66 unsigned char *p;
66961636 67
f628559d 68 wrap = width;
66961636 69 wrap3 = width * 3;
b481bbc3 70 p = src;
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71 for (y = 0; y < height; y += 2) {
72 for (x = 0; x < width; x += 2) {
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73 r = p[0];
74 g = p[1];
75 b = p[2];
76 r1 = r;
77 g1 = g;
78 b1 = b;
79 lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
80 FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
81 r = p[3];
82 g = p[4];
83 b = p[5];
84 r1 += r;
85 g1 += g;
86 b1 += b;
87 lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
88 FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
89 p += wrap3;
90 lum += wrap;
91
92 r = p[0];
93 g = p[1];
94 b = p[2];
95 r1 += r;
96 g1 += g;
97 b1 += b;
98 lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
99 FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
100 r = p[3];
101 g = p[4];
102 b = p[5];
103 r1 += r;
104 g1 += g;
105 b1 += b;
106 lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
107 FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
108
109 cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
110 FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
111 cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
112 FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
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113
114 cb++;
115 cr++;
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116 p += -wrap3 + 2 * 3;
117 lum += -wrap + 2;
66961636 118 }
f628559d 119 p += wrap3;
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120 lum += wrap;
121 }
122}
123
124/* cif format */
125#define DEFAULT_WIDTH 352
126#define DEFAULT_HEIGHT 288
f628559d 127#define DEFAULT_NB_PICT 50
66961636 128
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129static void pgmyuv_save(const char *filename, int w, int h,
130 unsigned char *rgb_tab)
66961636
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131{
132 FILE *f;
133 int i, h2, w2;
134 unsigned char *cb, *cr;
135 unsigned char *lum_tab, *cb_tab, *cr_tab;
136
137 lum_tab = malloc(w * h);
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138 cb_tab = malloc(w * h / 4);
139 cr_tab = malloc(w * h / 4);
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140
141 rgb24_to_yuv420p(lum_tab, cb_tab, cr_tab, rgb_tab, w, h);
142
f628559d 143 f = fopen(filename, "wb");
e9c10459 144 fprintf(f, "P5\n%d %d\n%d\n", w, h * 3 / 2, 255);
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145 fwrite(lum_tab, 1, w * h, f);
146 h2 = h / 2;
147 w2 = w / 2;
148 cb = cb_tab;
149 cr = cr_tab;
f628559d 150 for (i = 0; i < h2; i++) {
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151 fwrite(cb, 1, w2, f);
152 fwrite(cr, 1, w2, f);
153 cb += w2;
154 cr += w2;
155 }
156 fclose(f);
157
158 free(lum_tab);
159 free(cb_tab);
160 free(cr_tab);
161}
162
163unsigned char *rgb_tab;
164int width, height, wrap;
165
6f2162b4 166static void put_pixel(int x, int y, int r, int g, int b)
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167{
168 unsigned char *p;
169
170 if (x < 0 || x >= width ||
171 y < 0 || y >= height)
172 return;
173
b481bbc3 174 p = rgb_tab + y * wrap + x * 3;
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175 p[0] = r;
176 p[1] = g;
177 p[2] = b;
178}
179
f628559d
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180unsigned char tab_r[256 * 256];
181unsigned char tab_g[256 * 256];
182unsigned char tab_b[256 * 256];
66961636 183
b481bbc3
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184int h_cos[360];
185int h_sin[360];
66961636 186
f628559d
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187static int ipol(uint8_t *src, int x, int y)
188{
189 int int_x = x >> 16;
190 int int_y = y >> 16;
191 int frac_x = x & 0xFFFF;
192 int frac_y = y & 0xFFFF;
193 int s00 = src[( int_x & 255) + 256 * ( int_y & 255)];
194 int s01 = src[((int_x + 1) & 255) + 256 * ( int_y & 255)];
195 int s10 = src[( int_x & 255) + 256 * ((int_y + 1) & 255)];
196 int s11 = src[((int_x + 1) & 255) + 256 * ((int_y + 1) & 255)];
197 int s0 = (((1 << 16) - frac_x) * s00 + frac_x * s01) >> 8;
198 int s1 = (((1 << 16) - frac_x) * s10 + frac_x * s11) >> 8;
199
200 return (((1 << 16) - frac_y) * s0 + frac_y * s1) >> 24;
2add6b5d
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201}
202
6f2162b4 203static void gen_image(int num, int w, int h)
66961636 204{
b481bbc3
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205 const int c = h_cos[num % 360];
206 const int s = h_sin[num % 360];
115329f1 207
f628559d
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208 const int xi = -(w / 2) * c;
209 const int yi = (w / 2) * s;
115329f1 210
f628559d
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211 const int xj = -(h / 2) * s;
212 const int yj = -(h / 2) * c;
213 int i, j;
66961636 214
f628559d
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215 int x, y;
216 int xprime = xj;
217 int yprime = yj;
66961636 218
f628559d 219 for (j = 0; j < h; j++) {
b481bbc3 220 x = xprime + xi + FIXP * w / 2;
f628559d 221 xprime += s;
66961636 222
b481bbc3 223 y = yprime + yi + FIXP * h / 2;
f628559d 224 yprime += c;
66961636 225
b481bbc3 226 for (i = 0; i < w; i++) {
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227 x += c;
228 y -= s;
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229 put_pixel(i, j,
230 ipol(tab_r, x, y),
231 ipol(tab_g, x, y),
232 ipol(tab_b, x, y));
f628559d 233 }
66961636 234 }
66961636
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235}
236
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237#define W 256
238#define H 256
239
2131e859 240static int init_demo(const char *filename)
f628559d
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241{
242 int i, j;
243 int h;
244 int radian;
245 char line[3 * W];
246
e1e0ca70 247 FILE *input_file;
f628559d 248
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249 input_file = fopen(filename, "rb");
250 if (!input_file) {
f628559d 251 perror(filename);
2131e859 252 return 1;
f628559d
DB
253 }
254
e1e0ca70 255 if (fread(line, 1, 15, input_file) != 15)
cbb0930f 256 return 1;
f628559d 257 for (i = 0; i < H; i++) {
e1e0ca70 258 if (fread(line, 1, 3 * W, input_file) != 3 * W)
cbb0930f 259 return 1;
f628559d
DB
260 for (j = 0; j < W; j++) {
261 tab_r[W * i + j] = line[3 * j ];
262 tab_g[W * i + j] = line[3 * j + 1];
263 tab_b[W * i + j] = line[3 * j + 2];
264 }
265 }
e1e0ca70 266 fclose(input_file);
f628559d
DB
267
268 /* tables sin/cos */
269 for (i = 0; i < 360; i++) {
b481bbc3
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270 radian = 2 * i * MY_PI / 360;
271 h = 2 * FIXP + int_sin(radian);
e9c10459
DB
272 h_cos[i] = h * int_sin(radian + MY_PI / 2) / 2 / FIXP;
273 h_sin[i] = h * int_sin(radian) / 2 / FIXP;
66961636 274 }
2131e859 275
b481bbc3 276 return 0;
66961636
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277}
278
279int main(int argc, char **argv)
280{
281 int w, h, i;
282 char buf[1024];
283
67f7f316
FB
284 if (argc != 3) {
285 printf("usage: %s directory/ image.pnm\n"
66961636 286 "generate a test video stream\n", argv[0]);
771339ca 287 return 1;
66961636
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288 }
289
290 w = DEFAULT_WIDTH;
291 h = DEFAULT_HEIGHT;
292
293 rgb_tab = malloc(w * h * 3);
f628559d
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294 wrap = w * 3;
295 width = w;
296 height = h;
66961636 297
2131e859
DB
298 if (init_demo(argv[2]))
299 return 1;
66961636 300
f628559d 301 for (i = 0; i < DEFAULT_NB_PICT; i++) {
528bbdde 302 snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[1], i);
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303 gen_image(i, w, h);
304 pgmyuv_save(buf, w, h, rgb_tab);
305 }
115329f1 306
66961636
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307 free(rgb_tab);
308 return 0;
309}