blob: cfa7f81369bef92f8bf576347ccdb9a6f7370dbd
1 | /* |
2 | * Generate a synthetic YUV video sequence suitable for codec testing. |
3 | * |
4 | * copyright (c) Sebastien Bechet <s.bechet@av7.net> |
5 | * |
6 | * This file is part of FFmpeg. |
7 | * |
8 | * FFmpeg is free software; you can redistribute it and/or |
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 | * |
13 | * FFmpeg is distributed in the hope that it will be useful, |
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 |
19 | * License along with FFmpeg; if not, write to the Free Software |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
21 | */ |
22 | |
23 | #include <stdlib.h> |
24 | #include <stdio.h> |
25 | #include <inttypes.h> |
26 | |
27 | #include "utils.c" |
28 | |
29 | #define FIXP (1 << 16) |
30 | #define MY_PI 205887 // (M_PI * FIX) |
31 | |
32 | static int64_t int_pow(int64_t a, int p) |
33 | { |
34 | int64_t v = FIXP; |
35 | |
36 | for (; p; p--) { |
37 | v *= a; |
38 | v /= FIXP; |
39 | } |
40 | |
41 | return v; |
42 | } |
43 | |
44 | static int64_t int_sin(int64_t a) |
45 | { |
46 | if (a < 0) |
47 | a = MY_PI - a; // 0..inf |
48 | a %= 2 * MY_PI; // 0..2PI |
49 | |
50 | if (a >= MY_PI * 3 / 2) |
51 | a -= 2 * MY_PI; // -PI / 2 .. 3PI / 2 |
52 | if (a >= MY_PI / 2) |
53 | a = MY_PI - a; // -PI / 2 .. PI / 2 |
54 | |
55 | return a - int_pow(a, 3) / 6 + int_pow(a, 5) / 120 - int_pow(a, 7) / 5040; |
56 | } |
57 | |
58 | static unsigned char tab_r[256 * 256]; |
59 | static unsigned char tab_g[256 * 256]; |
60 | static unsigned char tab_b[256 * 256]; |
61 | |
62 | static int h_cos[360]; |
63 | static int h_sin[360]; |
64 | |
65 | static int ipol(uint8_t *src, int x, int y) |
66 | { |
67 | int int_x = x >> 16; |
68 | int int_y = y >> 16; |
69 | int frac_x = x & 0xFFFF; |
70 | int frac_y = y & 0xFFFF; |
71 | int s00 = src[( int_x & 255) + 256 * ( int_y & 255)]; |
72 | int s01 = src[((int_x + 1) & 255) + 256 * ( int_y & 255)]; |
73 | int s10 = src[( int_x & 255) + 256 * ((int_y + 1) & 255)]; |
74 | int s11 = src[((int_x + 1) & 255) + 256 * ((int_y + 1) & 255)]; |
75 | int s0 = (((1 << 16) - frac_x) * s00 + frac_x * s01) >> 8; |
76 | int s1 = (((1 << 16) - frac_x) * s10 + frac_x * s11) >> 8; |
77 | |
78 | return (((1 << 16) - frac_y) * s0 + frac_y * s1) >> 24; |
79 | } |
80 | |
81 | static void gen_image(int num, int w, int h) |
82 | { |
83 | const int c = h_cos[num % 360]; |
84 | const int s = h_sin[num % 360]; |
85 | |
86 | const int xi = -(w / 2) * c; |
87 | const int yi = (w / 2) * s; |
88 | |
89 | const int xj = -(h / 2) * s; |
90 | const int yj = -(h / 2) * c; |
91 | int i, j; |
92 | |
93 | int x, y; |
94 | int xprime = xj; |
95 | int yprime = yj; |
96 | |
97 | for (j = 0; j < h; j++) { |
98 | x = xprime + xi + FIXP * w / 2; |
99 | xprime += s; |
100 | |
101 | y = yprime + yi + FIXP * h / 2; |
102 | yprime += c; |
103 | |
104 | for (i = 0; i < w; i++) { |
105 | x += c; |
106 | y -= s; |
107 | put_pixel(i, j, |
108 | ipol(tab_r, x, y), |
109 | ipol(tab_g, x, y), |
110 | ipol(tab_b, x, y)); |
111 | } |
112 | } |
113 | } |
114 | |
115 | #define W 256 |
116 | #define H 256 |
117 | |
118 | static int init_demo(const char *filename) |
119 | { |
120 | int i, j; |
121 | int h; |
122 | int radian; |
123 | char line[3 * W]; |
124 | |
125 | FILE *input_file; |
126 | |
127 | input_file = fopen(filename, "rb"); |
128 | if (!input_file) { |
129 | perror(filename); |
130 | return 1; |
131 | } |
132 | |
133 | if (fread(line, 1, 15, input_file) != 15) |
134 | return 1; |
135 | for (i = 0; i < H; i++) { |
136 | if (fread(line, 1, 3 * W, input_file) != 3 * W) |
137 | return 1; |
138 | for (j = 0; j < W; j++) { |
139 | tab_r[W * i + j] = line[3 * j ]; |
140 | tab_g[W * i + j] = line[3 * j + 1]; |
141 | tab_b[W * i + j] = line[3 * j + 2]; |
142 | } |
143 | } |
144 | fclose(input_file); |
145 | |
146 | /* tables sin/cos */ |
147 | for (i = 0; i < 360; i++) { |
148 | radian = 2 * i * MY_PI / 360; |
149 | h = 2 * FIXP + int_sin(radian); |
150 | h_cos[i] = h * int_sin(radian + MY_PI / 2) / 2 / FIXP; |
151 | h_sin[i] = h * int_sin(radian) / 2 / FIXP; |
152 | } |
153 | |
154 | return 0; |
155 | } |
156 | |
157 | int main(int argc, char **argv) |
158 | { |
159 | int w, h, i; |
160 | char buf[1024]; |
161 | int isdir = 0; |
162 | |
163 | if (argc != 3) { |
164 | printf("usage: %s image.pnm file|dir\n" |
165 | "generate a test video stream\n", argv[0]); |
166 | return 1; |
167 | } |
168 | |
169 | if (!freopen(argv[2], "wb", stdout)) |
170 | isdir = 1; |
171 | |
172 | w = DEFAULT_WIDTH; |
173 | h = DEFAULT_HEIGHT; |
174 | |
175 | rgb_tab = malloc(w * h * 3); |
176 | wrap = w * 3; |
177 | width = w; |
178 | height = h; |
179 | |
180 | if (init_demo(argv[1])) |
181 | return 1; |
182 | |
183 | for (i = 0; i < DEFAULT_NB_PICT; i++) { |
184 | gen_image(i, w, h); |
185 | if (isdir) { |
186 | snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[2], i); |
187 | pgmyuv_save(buf, w, h, rgb_tab); |
188 | } else { |
189 | pgmyuv_save(NULL, w, h, rgb_tab); |
190 | } |
191 | } |
192 | |
193 | free(rgb_tab); |
194 | return 0; |
195 | } |
196 |