/*
* Generates a synthetic YUV video sequence suitable for codec testing.
- * GPLv2
- * rotozoom.c -> s.bechet@av7.net
+ *
+ * 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 <math.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))
+#define FIX(x) ((int) ((x) * (1L<<SCALEBITS) + 0.5))
typedef unsigned char UINT8;
static void rgb24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
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++;
/* cif format */
#define DEFAULT_WIDTH 352
#define DEFAULT_HEIGHT 288
-#define DEFAULT_NB_PICT 360
+#define DEFAULT_NB_PICT 50
-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;
rgb24_to_yuv420p(lum_tab, cb_tab, cr_tab, rgb_tab, w, h);
- f = fopen(filename,"w");
+ 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;
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;
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)
+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;
+}
+
+static void gen_image(int num, int w, int h)
{
- const int c = h_cos [teta];
- const int s = h_sin [teta];
-
+ 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;
-
- unsigned dep;
int i,j;
-
+
int x,y;
int xprime = xj;
int yprime = yj;
for (j=0;j<h;j++) {
- x = xprime + xi;
+ x = xprime + xi + FIXP*w/2;
xprime += s;
- y = yprime + yi;
+ y = yprime + yi + FIXP*h/2;
yprime += c;
-
+
for ( i=0 ; i<w ; i++ ) {
x += c;
y -= s;
- dep = ((x>>8)&255) + (y&(255<<8));
- put_pixel(i, j, tab_r[dep], tab_g[dep], tab_b[dep]);
+#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;
}
-void init_demo() {
+#define W 256
+#define H 256
+
+static void init_demo(const char *filename) {
int i,j;
- double h;
- double radian;
- char line[3 * 128];
+ int h;
+ int radian;
+ char line[3 * W];
FILE *fichier;
-
- fichier = fopen("rotozoom-ffmpeg.pnm","r");
- fread(line, 1, 15, fichier);
- for (i=0;i<128;i++) {
- fread(line,1,3*128,fichier);
- for (j=0;j<128;j++) {
- tab_r[256*i+j] = line[3*j ];
- tab_g[256*i+j] = line[3*j + 1];
- tab_b[256*i+j] = line[3*j + 2];
- }
- memcpy(tab_r + 257*128 + i*256, tab_r + i*256, 128);
- memcpy(tab_g + 257*128 + i*256, tab_g + i*256, 128);
- memcpy(tab_b + 257*128 + i*256, tab_b + i*256, 128);
+ fichier = fopen(filename,"rb");
+ if (!fichier) {
+ perror(filename);
+ exit(1);
}
- fclose(fichier);
- fichier = fopen("rotozoom-tux.pnm","r");
fread(line, 1, 15, fichier);
- for (i=0;i<128;i++) {
- fread(line,1,3*128,fichier);
- for (j=0;j<128;j++) {
- tab_r[128 + 256*i+j] = line[3*j ];
- tab_g[128 + 256*i+j] = line[3*j + 1];
- tab_b[128 + 256*i+j] = line[3*j + 2];
+ 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];
}
- memcpy(tab_r + 256*128 + i*256, tab_r + 128 + i*256, 128);
- memcpy(tab_g + 256*128 + i*256, tab_g + 128 + i*256, 128);
- memcpy(tab_b + 256*128 + i*256, tab_b + 128 + i*256, 128);
}
fclose(fichier);
-
-
/* tables sin/cos */
for (i=0;i<360;i++) {
- radian = 2*i*M_PI/360;
- h = 2 + cos (radian);
- h_cos[i] = 256 * ( h * cos (radian) );
- h_sin[i] = 256 * ( h * 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;
}
}
int w, h, i;
char buf[1024];
- if (argc != 2) {
- printf("usage: %s directory/\n"
+ if (argc != 3) {
+ printf("usage: %s directory/ image.pnm\n"
"generate a test video stream\n", argv[0]);
exit(1);
}
width = w;
height = h;
- init_demo();
+ init_demo(argv[2]);
for(i=0;i<DEFAULT_NB_PICT;i++) {
- snprintf(buf, sizeof(buf), "%s%03d.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;
}
projects / ffmpeg / blobdiff