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-rw-r--r--contrib/ffmpeg/tests/rotozoom.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/contrib/ffmpeg/tests/rotozoom.c b/contrib/ffmpeg/tests/rotozoom.c
new file mode 100644
index 000000000..52f5546a3
--- /dev/null
+++ b/contrib/ffmpeg/tests/rotozoom.c
@@ -0,0 +1,306 @@
+/*
+ * Generates a synthetic YUV video sequence suitable for codec testing.
+ *
+ * copyright (c) Sebastien Bechet <s.bechet@av7.net>
+ *
+ * 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 <stdio.h>
+#include <inttypes.h>
+
+#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;
+
+ 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
+
+ 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;
+}
+
+#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 50
+
+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);
+}
+
+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;
+}
+
+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];
+
+static int ipol(uint8_t *src, int x, int y){
+ 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;
+}
+
+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;
+ 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;
+#if 1
+ put_pixel(i, j, ipol(tab_r, x, y), ipol(tab_g, x, y), ipol(tab_b, x, y));
+#else
+ {
+ unsigned dep;
+ dep = ((x>>16)&255) + (((y>>16)&255)<<8);
+ put_pixel(i, j, tab_r[dep], tab_g[dep], tab_b[dep]);
+ }
+#endif
+ }
+ }
+ teta = (teta+1) % 360;
+}
+
+#define W 256
+#define H 256
+
+void init_demo(const char *filename) {
+ int i,j;
+ int h;
+ int radian;
+ char line[3 * W];
+
+ FILE *fichier;
+
+ fichier = fopen(filename,"rb");
+ if (!fichier) {
+ perror(filename);
+ exit(1);
+ }
+
+ 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];
+ }
+ }
+ 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;
+ }
+}
+
+int main(int argc, char **argv)
+{
+ int w, h, i;
+ char buf[1024];
+
+ if (argc != 3) {
+ printf("usage: %s directory/ image.pnm\n"
+ "generate a test video stream\n", argv[0]);
+ exit(1);
+ }
+
+ w = DEFAULT_WIDTH;
+ h = DEFAULT_HEIGHT;
+
+ rgb_tab = malloc(w * h * 3);
+ wrap = w * 3;
+ width = w;
+ height = h;
+
+ init_demo(argv[2]);
+
+ 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);
+ }
+
+ free(rgb_tab);
+ return 0;
+}
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