Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  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.