/*
- * Generates a synthetic YUV video sequence suitable for codec testing.
- * NOTE: no floats are used to guaranty a bit exact output.
+ * 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 Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; 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>
-#define SCALEBITS 8
-#define ONE_HALF (1 << (SCALEBITS - 1))
-#define FIX(x) ((int) ((x) * (1L<<SCALEBITS) + 0.5))
-typedef unsigned char UINT8;
-
-static void rgb24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
- UINT8 *src, int width, int height)
-{
- int wrap, wrap3, x, y;
- int r, g, b, r1, g1, b1;
- UINT8 *p;
-
- wrap = width;
- wrap3 = width * 3;
- p = src;
- for(y=0;y<height;y+=2) {
- for(x=0;x<width;x+=2) {
- r = p[0];
- g = p[1];
- b = p[2];
- r1 = r;
- g1 = g;
- b1 = b;
- lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
- FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
- r = p[3];
- g = p[4];
- b = p[5];
- r1 += r;
- g1 += g;
- b1 += b;
- lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
- FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
- p += wrap3;
- lum += wrap;
-
- r = p[0];
- g = p[1];
- b = p[2];
- r1 += r;
- g1 += g;
- b1 += b;
- lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
- FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
- r = p[3];
- g = p[4];
- b = p[5];
- r1 += r;
- g1 += g;
- b1 += b;
- lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
- FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
-
- cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
- FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
- cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
- FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
-
- cb++;
- cr++;
- p += -wrap3 + 2 * 3;
- lum += -wrap + 2;
- }
- p += wrap3;
- lum += wrap;
- }
-}
-
-/* cif format */
-#define DEFAULT_WIDTH 352
-#define DEFAULT_HEIGHT 288
-#define DEFAULT_NB_PICT 125 /* 5 seconds */
-
-void pgmyuv_save(const char *filename, int w, int h,
- unsigned char *rgb_tab)
-{
- FILE *f;
- int i, h2, w2;
- unsigned char *cb, *cr;
- unsigned char *lum_tab, *cb_tab, *cr_tab;
-
- lum_tab = malloc(w * h);
- cb_tab = malloc((w * h) / 4);
- cr_tab = malloc((w * h) / 4);
-
- rgb24_to_yuv420p(lum_tab, cb_tab, cr_tab, rgb_tab, w, h);
-
- f = fopen(filename,"w");
- fprintf(f, "P5\n%d %d\n%d\n", w, (h * 3) / 2, 255);
- fwrite(lum_tab, 1, w * h, f);
- h2 = h / 2;
- w2 = w / 2;
- cb = cb_tab;
- cr = cr_tab;
- for(i=0;i<h2;i++) {
- fwrite(cb, 1, w2, f);
- fwrite(cr, 1, w2, f);
- cb += w2;
- cr += w2;
- }
- fclose(f);
-
- free(lum_tab);
- free(cb_tab);
- free(cr_tab);
-}
-
-unsigned char *rgb_tab;
-int width, height, wrap;
-
-void put_pixel(int x, int y, int r, int g, int b)
-{
- unsigned char *p;
-
- if (x < 0 || x >= width ||
- y < 0 || y >= height)
- return;
-
- p = rgb_tab + y * wrap + x * 3;
- p[0] = r;
- p[1] = g;
- p[2] = b;
-}
+#include "utils.c"
static unsigned int myrnd(unsigned int *seed_ptr, int n)
{
#define FRAC_ONE (1 << FRAC_BITS)
/* cosine approximate with 1-x^2 */
-int int_cos(int a)
+static int int_cos(int a)
{
int v, neg;
a = a & (FRAC_ONE - 1);
neg = 0;
if (a > (FRAC_ONE / 4)) {
neg = -1;
- a = (FRAC_ONE / 2) - a;
+ a = (FRAC_ONE / 2) - a;
}
v = FRAC_ONE - ((a * a) >> 4);
v = (v ^ neg) - neg;
int r, g, b;
} VObj;
-VObj objs[NB_OBJS];
+static VObj objs[NB_OBJS];
-unsigned int seed = 1;
+static unsigned int seed = 1;
-void gen_image(int num, int w, int h)
+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++) {
+ 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;
/* 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++) {
+ for (y = 0; y < h; y++) {
+ for (x = 0; x < w; x++) {
x1 = (x << FRAC_BITS) + dx;
- y1 = (y << FRAC_BITS) + dx;
- r = ((y1 * 7) >> FRAC_BITS) & 0xff;
- g = (((x1 + y1) * 9) >> FRAC_BITS) & 0xff;
- b = ((x1 * 5) >> FRAC_BITS) & 0xff;
+ 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++) {
+ 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++) {
+ 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++) {
+ for (y = 0; y < p->h; y++) {
+ for (x = 0; x < p->w; x++) {
r = p->r;
g = p->g;
b = p->b;
{
int w, h, i;
char buf[1024];
+ int isdir = 0;
if (argc != 2) {
- printf("usage: %s file\n"
+ printf("usage: %s file|dir\n"
"generate a test video stream\n", argv[0]);
exit(1);
}
-#if 0
- for(i=0;i<256;i++)
- printf("cos(%d)=%d\n", i, int_cos(i));
-#endif
+ 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;
+ wrap = w * 3;
+ width = w;
+ height = h;
- for(i=0;i<DEFAULT_NB_PICT;i++) {
- snprintf(buf, sizeof(buf), "%s%d.pgm", argv[1], i);
+ for (i = 0; i < DEFAULT_NB_PICT; i++) {
gen_image(i, w, h);
- pgmyuv_save(buf, w, h, rgb_tab);
+ 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;
}
projects / ffmpeg / blobdiff