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Diffstat (limited to 'ffmpeg/tests/videogen.c')
| -rw-r--r-- | ffmpeg/tests/videogen.c | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/ffmpeg/tests/videogen.c b/ffmpeg/tests/videogen.c deleted file mode 100644 index 94e6e77..0000000 --- a/ffmpeg/tests/videogen.c +++ /dev/null @@ -1,179 +0,0 @@ -/* - * Generate a synthetic YUV video sequence suitable for codec testing. - * NOTE: No floats are used to guarantee bitexact output. - * - * Copyright (c) 2002 Fabrice Bellard - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <stdlib.h> -#include <stdint.h> -#include <stdio.h> - -#include "utils.c" - -static unsigned int myrnd(unsigned int *seed_ptr, int n) -{ - unsigned int seed, val; - - seed = *seed_ptr; - seed = (seed * 314159) + 1; - if (n == 256) { - val = seed >> 24; - } else { - val = seed % n; - } - *seed_ptr = seed; - return val; -} - -#define NOISE_X 10 -#define NOISE_Y 30 -#define NOISE_W 26 - -#define FRAC_BITS 8 -#define FRAC_ONE (1 << FRAC_BITS) - -/* cosine approximate with 1-x^2 */ -static int int_cos(int a) -{ - int v, neg; - a = a & (FRAC_ONE - 1); - if (a >= (FRAC_ONE / 2)) - a = FRAC_ONE - a; - neg = 0; - if (a > (FRAC_ONE / 4)) { - neg = -1; - a = (FRAC_ONE / 2) - a; - } - v = FRAC_ONE - ((a * a) >> 4); - v = (v ^ neg) - neg; - return v; -} - -#define NB_OBJS 10 - -typedef struct VObj { - int x, y, w, h; - int r, g, b; -} VObj; - -static VObj objs[NB_OBJS]; - -static unsigned int seed = 1; - -static void gen_image(int num, int w, int h) -{ - int r, g, b, x, y, i, dx, dy, x1, y1; - unsigned int seed1; - - if (num == 0) { - for (i = 0; i < NB_OBJS; i++) { - objs[i].x = myrnd(&seed, w); - objs[i].y = myrnd(&seed, h); - objs[i].w = myrnd(&seed, w / 4) + 10; - objs[i].h = myrnd(&seed, h / 4) + 10; - objs[i].r = myrnd(&seed, 256); - objs[i].g = myrnd(&seed, 256); - objs[i].b = myrnd(&seed, 256); - } - } - - /* first a moving background with gradients */ - /* test motion estimation */ - dx = int_cos(num * FRAC_ONE / 50) * 35; - dy = int_cos(num * FRAC_ONE / 50 + FRAC_ONE / 10) * 30; - for (y = 0; y < h; y++) { - for (x = 0; x < w; x++) { - x1 = (x << FRAC_BITS) + dx; - y1 = (y << FRAC_BITS) + dy; - r = ((y1 * 7) >> FRAC_BITS) & 0xff; - g = (((x1 + y1) * 9) >> FRAC_BITS) & 0xff; - b = ((x1 * 5) >> FRAC_BITS) & 0xff; - put_pixel(x, y, r, g, b); - } - } - - /* then some noise with very high intensity to test saturation */ - seed1 = num; - for (y = 0; y < NOISE_W; y++) { - for (x = 0; x < NOISE_W; x++) { - r = myrnd(&seed1, 256); - g = myrnd(&seed1, 256); - b = myrnd(&seed1, 256); - put_pixel(x + NOISE_X, y + NOISE_Y, r, g, b); - } - } - - /* then moving objects */ - for (i = 0; i < NB_OBJS; i++) { - VObj *p = &objs[i]; - seed1 = i; - for (y = 0; y < p->h; y++) { - for (x = 0; x < p->w; x++) { - r = p->r; - g = p->g; - b = p->b; - /* add a per object noise */ - r += myrnd(&seed1, 50); - g += myrnd(&seed1, 50); - b += myrnd(&seed1, 50); - put_pixel(x + p->x, y + p->y, r, g, b); - } - } - p->x += myrnd(&seed, 21) - 10; - p->y += myrnd(&seed, 21) - 10; - } -} - -int main(int argc, char **argv) -{ - int w, h, i; - char buf[1024]; - int isdir = 0; - - if (argc != 2) { - printf("usage: %s file|dir\n" - "generate a test video stream\n", argv[0]); - exit(1); - } - - if (!freopen(argv[1], "wb", stdout)) - isdir = 1; - - w = DEFAULT_WIDTH; - h = DEFAULT_HEIGHT; - - rgb_tab = malloc(w * h * 3); - wrap = w * 3; - width = w; - height = h; - - for (i = 0; i < DEFAULT_NB_PICT; i++) { - gen_image(i, w, h); - if (isdir) { - snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[1], i); - pgmyuv_save(buf, w, h, rgb_tab); - } else { - pgmyuv_save(NULL, w, h, rgb_tab); - } - } - - free(rgb_tab); - return 0; -} |