/*
- * Generates a synthetic YUV video sequence suitable for codec testing.
- * GPLv2
- * rotozoom.c -> s.bechet@av7.net
+ * Generate a synthetic YUV video sequence suitable for codec testing.
+ *
+ * copyright (c) Sebastien Bechet <s.bechet@av7.net>
+ *
+ * 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 <stdio.h>
#include <inttypes.h>
-#define FIXP (1<<16)
-#define MY_PI 205887 //(M_PI*FIX)
+#include "utils.c"
+
+#define FIXP (1 << 16)
+#define MY_PI 205887 // (M_PI * FIX)
-static int64_t int_pow(int64_t a, int p){
- int64_t v= FIXP;
+static int64_t int_pow(int64_t a, int p)
+{
+ int64_t v = FIXP;
- for(; p; p--){
- v*= a;
- v/= FIXP;
+ for (; p; p--) {
+ v *= a;
+ v /= FIXP;
}
return v;
}
-static int64_t int_sin(int64_t a){
- if(a<0) a= MY_PI-a; // 0..inf
- a %= 2*MY_PI; // 0..2PI
+static int64_t int_sin(int64_t a)
+{
+ if (a < 0)
+ a = MY_PI - a; // 0..inf
+ a %= 2 * MY_PI; // 0..2PI
+
+ if (a >= MY_PI * 3 / 2)
+ a -= 2 * MY_PI; // -PI / 2 .. 3PI / 2
+ if (a >= MY_PI / 2)
+ a = MY_PI - a; // -PI / 2 .. PI / 2
- if(a>=MY_PI*3/2) a -= 2*MY_PI; // -PI/2 .. 3PI/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;
+ 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))
-typedef unsigned char UINT8;
+static unsigned char tab_r[256 * 256];
+static unsigned char tab_g[256 * 256];
+static unsigned char tab_b[256 * 256];
+
+static int h_cos[360];
+static int h_sin[360];
-static void rgb24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
- UINT8 *src, int width, int height)
+static int ipol(uint8_t *src, int x, int y)
{
- 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;
- }
+ int int_x = x >> 16;
+ int int_y = y >> 16;
+ int frac_x = x & 0xFFFF;
+ int frac_y = y & 0xFFFF;
+ int s00 = src[( int_x & 255) + 256 * ( int_y & 255)];
+ int s01 = src[((int_x + 1) & 255) + 256 * ( int_y & 255)];
+ int s10 = src[( int_x & 255) + 256 * ((int_y + 1) & 255)];
+ int s11 = src[((int_x + 1) & 255) + 256 * ((int_y + 1) & 255)];
+ int s0 = (((1 << 16) - frac_x) * s00 + frac_x * s01) >> 8;
+ int s1 = (((1 << 16) - frac_x) * s10 + frac_x * s11) >> 8;
+
+ return (((1 << 16) - frac_y) * s0 + frac_y * s1) >> 24;
}
-/* cif format */
-#define DEFAULT_WIDTH 352
-#define DEFAULT_HEIGHT 288
-#define DEFAULT_NB_PICT 50
-
-void pgmyuv_save(const char *filename, int w, int h,
- unsigned char *rgb_tab)
+static void gen_image(int num, int w, int h)
{
- 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;
+ 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;
+
+ const int xj = -(h / 2) * s;
+ const int yj = -(h / 2) * c;
+ int i, j;
+
+ int x, y;
+ int xprime = xj;
+ int yprime = yj;
+
+ for (j = 0; j < h; j++) {
+ x = xprime + xi + FIXP * w / 2;
+ xprime += s;
+
+ y = yprime + yi + FIXP * h / 2;
+ yprime += c;
+
+ 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));
+ }
}
- fclose(f);
-
- free(lum_tab);
- free(cb_tab);
- free(cr_tab);
}
-unsigned char *rgb_tab;
-int width, height, wrap;
+#define W 256
+#define H 256
-void put_pixel(int x, int y, int r, int g, int b)
+static int init_demo(const char *filename)
{
- unsigned char *p;
-
- if (x < 0 || x >= width ||
- y < 0 || y >= height)
- return;
+ int i, j;
+ int h;
+ int radian;
+ char line[3 * W];
- p = rgb_tab + y * wrap + x * 3;
- p[0] = r;
- p[1] = g;
- p[2] = b;
-}
+ FILE *input_file;
-unsigned char tab_r[256*256];
-unsigned char tab_g[256*256];
-unsigned char tab_b[256*256];
-
-int teta = 0;
-int h_cos [360];
-int h_sin [360];
-
-void gen_image(int num, int w, int h)
-{
- const int c = h_cos [teta];
- const int s = h_sin [teta];
-
- const int xi = -(w/2) * c;
- const int yi = (w/2) * s;
-
- const int xj = -(h/2) * s;
- const int yj = -(h/2) * c;
-
- unsigned dep;
- int i,j;
-
- int x,y;
- int xprime = xj;
- int yprime = yj;
-
-
- for (j=0;j<h;j++) {
-
- x = xprime + xi + FIXP*w/2;
- xprime += s;
-
- y = yprime + yi + FIXP*h/2;
- yprime += c;
-
- for ( i=0 ; i<w ; i++ ) {
- x += c;
- y -= s;
- dep = ((x>>16)&255) + (((y>>16)&255)<<8);
- put_pixel(i, j, tab_r[dep], tab_g[dep], tab_b[dep]);
+ input_file = fopen(filename, "rb");
+ if (!input_file) {
+ perror(filename);
+ return 1;
}
- }
- teta = (teta+1) % 360;
-}
-
-#define W 256
-#define H 256
-void init_demo() {
- int i,j;
- int h;
- int radian;
- char line[3 * W];
-
- FILE *fichier;
-
- fichier = fopen("lena.pnm","r");
- fread(line, 1, 15, fichier);
- for (i=0;i<H;i++) {
- fread(line,1,3*W,fichier);
- 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];
+ if (fread(line, 1, 15, input_file) != 15)
+ return 1;
+ for (i = 0; i < H; i++) {
+ 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(input_file);
+
+ /* tables sin/cos */
+ for (i = 0; i < 360; i++) {
+ 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;
}
- }
- fclose(fichier);
-
- /* tables sin/cos */
- for (i=0;i<360;i++) {
- 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;
}
int main(int argc, char **argv)
{
int w, h, i;
char buf[1024];
+ int isdir = 0;
- if (argc != 2) {
- printf("usage: %s directory/\n"
+ if (argc != 3) {
+ printf("usage: %s image.pnm file|dir\n"
"generate a test video stream\n", argv[0]);
- exit(1);
+ return 1;
}
+ if (!freopen(argv[2], "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;
- init_demo();
+ if (init_demo(argv[1]))
+ return 1;
- 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[2], i);
+ pgmyuv_save(buf, w, h, rgb_tab);
+ } else {
+ pgmyuv_save(NULL, w, h, rgb_tab);
+ }
}
-
+
free(rgb_tab);
return 0;
}
projects / ffmpeg / blobdiff