/*
- * Generates a synthetic YUV video sequence suitable for codec testing.
+ * Generate a synthetic YUV video sequence suitable for codec testing.
*
* copyright (c) Sebastien Bechet <s.bechet@av7.net>
*
#include <stdio.h>
#include <inttypes.h>
+#include "utils.c"
+
#define FIXP (1 << 16)
-#define MY_PI 205887 //(M_PI * FIX)
+#define MY_PI 205887 // (M_PI * FIX)
static int64_t int_pow(int64_t a, int p)
{
if (a >= MY_PI * 3 / 2)
a -= 2 * MY_PI; // -PI / 2 .. 3PI / 2
- if (a >= MY_PI /2)
+ if (a >= MY_PI / 2)
a = MY_PI - a; // -PI / 2 .. PI / 2
return a - int_pow(a, 3) / 6 + int_pow(a, 5) / 120 - int_pow(a, 7) / 5040;
}
-#define SCALEBITS 8
-#define ONE_HALF (1 << (SCALEBITS - 1))
-#define FIX(x) ((int) ((x) * (1L << SCALEBITS) + 0.5))
-
-static void rgb24_to_yuv420p(unsigned char *lum, unsigned char *cb,
- unsigned char *cr, unsigned char *src,
- int width, int height)
-{
- int wrap, wrap3, x, y;
- int r, g, b, r1, g1, b1;
- unsigned char *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 50
-
-static 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, "wb");
- 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);
-}
+static unsigned char tab_r[256 * 256];
+static unsigned char tab_g[256 * 256];
+static unsigned char tab_b[256 * 256];
-unsigned char *rgb_tab;
-int width, height, wrap;
-
-static 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;
-}
-
-unsigned char tab_r[256 * 256];
-unsigned char tab_g[256 * 256];
-unsigned char tab_b[256 * 256];
-
-int h_cos [360];
-int h_sin [360];
+static int h_cos[360];
+static int h_sin[360];
static int ipol(uint8_t *src, int x, int y)
{
static void gen_image(int num, int w, int h)
{
- const int c = h_cos [num % 360];
- const int s = h_sin [num % 360];
+ const int c = h_cos[num % 360];
+ const int s = h_sin[num % 360];
const int xi = -(w / 2) * c;
const int yi = (w / 2) * s;
int yprime = yj;
for (j = 0; j < h; j++) {
- x = xprime + xi + FIXP * w / 2;
+ x = xprime + xi + FIXP * w / 2;
xprime += s;
- y = yprime + yi + FIXP * h / 2;
+ y = yprime + yi + FIXP * h / 2;
yprime += c;
- for (i = 0; i < w; i++ ) {
+ for (i = 0; i < w; i++) {
x += c;
y -= s;
- put_pixel(i, j, ipol(tab_r, x, y), ipol(tab_g, x, y), ipol(tab_b, x, y));
+ put_pixel(i, j,
+ ipol(tab_r, x, y),
+ ipol(tab_g, x, y),
+ ipol(tab_b, x, y));
}
}
}
int radian;
char line[3 * W];
- FILE *fichier;
+ FILE *input_file;
- fichier = fopen(filename, "rb");
- if (!fichier) {
+ input_file = fopen(filename, "rb");
+ if (!input_file) {
perror(filename);
return 1;
}
- fread(line, 1, 15, fichier);
+ if (fread(line, 1, 15, input_file) != 15)
+ return 1;
for (i = 0; i < H; i++) {
- fread(line, 1, 3 * W, fichier);
+ if (fread(line, 1, 3 * W, input_file) != 3 * W)
+ return 1;
for (j = 0; j < W; j++) {
tab_r[W * i + j] = line[3 * j ];
tab_g[W * i + j] = line[3 * j + 1];
tab_b[W * i + j] = line[3 * j + 2];
}
}
- fclose(fichier);
+ fclose(input_file);
/* tables sin/cos */
for (i = 0; i < 360; i++) {
- radian = 2 * i * MY_PI / 360;
- h = 2 * FIXP + int_sin (radian);
+ radian = 2 * i * MY_PI / 360;
+ h = 2 * FIXP + int_sin(radian);
h_cos[i] = h * int_sin(radian + MY_PI / 2) / 2 / FIXP;
h_sin[i] = h * int_sin(radian) / 2 / FIXP;
}
- return 0;
+ return 0;
}
int main(int argc, char **argv)
{
int w, h, i;
char buf[1024];
+ int isdir = 0;
if (argc != 3) {
- printf("usage: %s directory/ image.pnm\n"
+ printf("usage: %s image.pnm file|dir\n"
"generate a test video stream\n", argv[0]);
return 1;
}
+ if (!freopen(argv[2], "wb", stdout))
+ isdir = 1;
+
w = DEFAULT_WIDTH;
h = DEFAULT_HEIGHT;
width = w;
height = h;
- if (init_demo(argv[2]))
+ if (init_demo(argv[1]))
return 1;
for (i = 0; i < DEFAULT_NB_PICT; i++) {
- snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[1], i);
gen_image(i, w, h);
- pgmyuv_save(buf, w, h, rgb_tab);
+ if (isdir) {
+ snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[2], i);
+ pgmyuv_save(buf, w, h, rgb_tab);
+ } else {
+ pgmyuv_save(NULL, w, h, rgb_tab);
+ }
}
free(rgb_tab);
projects / ffmpeg / blobdiff