/*
* Generates a synthetic YUV video sequence suitable for codec testing.
- * NOTE: no floats are used to guaranty a bit exact output.
+ * NOTE: No floats are used to guarantee a bit exact 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>
#define SCALEBITS 8
#define ONE_HALF (1 << (SCALEBITS - 1))
-#define FIX(x) ((int) ((x) * (1L<<SCALEBITS) + 0.5))
-typedef unsigned char uint8_t;
+#define FIX(x) ((int) ((x) * (1L<<SCALEBITS) + 0.5))
static void rgb24_to_yuv420p(uint8_t *lum, uint8_t *cb, uint8_t *cr,
uint8_t *src, int width, int height)
r1 = r;
g1 = g;
b1 = b;
- lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
+ lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
r = p[3];
g = p[4];
r1 += r;
g1 += g;
b1 += b;
- lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
+ lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
p += wrap3;
lum += wrap;
r1 += r;
g1 += g;
b1 += b;
- lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
+ lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
r = p[3];
g = p[4];
r1 += r;
g1 += g;
b1 += b;
- lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
+ 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 +
+
+ 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 -
+ cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cb++;
#define DEFAULT_HEIGHT 288
#define DEFAULT_NB_PICT 50 /* 2 seconds */
-void pgmyuv_save(const char *filename, int w, int h,
- unsigned char *rgb_tab)
+static void pgmyuv_save(const char *filename, int w, int h,
+ unsigned char *rgb_tab)
{
FILE *f;
int i, h2, w2;
unsigned char *rgb_tab;
int width, height, wrap;
-void put_pixel(int x, int y, int r, int g, int b)
+static void put_pixel(int x, int y, int r, int g, int b)
{
unsigned char *p;
#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);
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;
for(y=0;y<h;y++) {
for(x=0;x<w;x++) {
x1 = (x << FRAC_BITS) + dx;
- y1 = (y << 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 + NOISE_X, y + NOISE_Y, r, g, b);
}
}
-
+
/* then moving objects */
for(i=0;i<NB_OBJS;i++) {
VObj *p = &objs[i];
exit(1);
}
-#if 0
- for(i=0;i<256;i++)
- printf("cos(%d)=%d\n", i, int_cos(i));
-#endif
-
w = DEFAULT_WIDTH;
h = DEFAULT_HEIGHT;
height = h;
for(i=0;i<DEFAULT_NB_PICT;i++) {
- snprintf(buf, sizeof(buf), "%s%d.pgm", argv[1], i);
+ snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[1], i);
gen_image(i, w, h);
pgmyuv_save(buf, w, h, rgb_tab);
}
-
+
free(rgb_tab);
return 0;
}