added first version of regression tests - simply type 'make test' to test every codec and some mux/demuxes - added simple synthetic audio and video bitstreams generators so that no big streams needs to be used

Originally committed as revision 532 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 278 insertions, 0 deletions

diff --git a/tests/videogen.c b/tests/videogen.c
new file mode 100644
index 0000000000..396fcdd605
--- /dev/null
+++ b/tests/videogen.c
@@ -0,0 +1,278 @@
+/*
+ * Generates a synthetic YUV video sequence suitable for codec testing.
+ * NOTE: no floats are used to guaranty a bit exact output.
+ */
+#include <stdlib.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;
+
+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 125 /* 5 seconds */
+
+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,"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;
+    }
+    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;
+}
+
+static unsigned int myrnd(unsigned int *seed_ptr, int n)
+{
+    unsigned int seed, val;
+
+    seed = *seed_ptr;
+    seed = (seed * 314159) + 1;
+    if (n == 256) {
+        val = seed >> 24;
+    } else {
+        val = seed % n;
+    }
+    *seed_ptr = seed;
+    return val;
+}
+
+#define NOISE_X  10
+#define NOISE_Y  30
+#define NOISE_W  26
+
+#define FRAC_BITS 8
+#define FRAC_ONE (1 << FRAC_BITS)
+
+/* cosine approximate with 1-x^2 */
+int int_cos(int a)
+{
+    int v, neg;
+    a = a & (FRAC_ONE - 1);
+    if (a >= (FRAC_ONE / 2))
+        a = FRAC_ONE - a;
+    neg = 0;
+    if (a > (FRAC_ONE / 4)) {
+        neg = -1;
+        a = (FRAC_ONE / 2) - a;
+    }
+    v = FRAC_ONE - ((a * a) >> 4);
+    v = (v ^ neg) - neg;
+    return v;
+}
+
+#define NB_OBJS  10
+
+typedef struct VObj {
+    int x, y, w, h;
+    int r, g, b;
+} VObj;
+
+VObj objs[NB_OBJS];
+
+unsigned int seed = 1;
+
+void gen_image(int num, int w, int h)
+{
+    int r, g, b, x, y, i, dx, dy, x1, y1;
+    unsigned int seed1;
+
+    if (num == 0) {
+        for(i=0;i<NB_OBJS;i++) {
+            objs[i].x = myrnd(&seed, w);
+            objs[i].y = myrnd(&seed, h);
+            objs[i].w = myrnd(&seed, w / 4) + 10;
+            objs[i].h = myrnd(&seed, h / 4) + 10;
+            objs[i].r = myrnd(&seed, 256);
+            objs[i].g = myrnd(&seed, 256);
+            objs[i].b = myrnd(&seed, 256);
+        }
+    }
+
+    /* first a moving background with gradients */
+    /* test motion estimation */
+    dx = int_cos(num * FRAC_ONE / 50) * 35;
+    dy = int_cos(num * FRAC_ONE / 50 + FRAC_ONE / 10) * 30;
+    for(y=0;y<h;y++) {
+        for(x=0;x<w;x++) {
+            x1 = (x << FRAC_BITS) + dx;
+            y1 = (y << FRAC_BITS) + dx;
+            r = ((y1 * 7) >> FRAC_BITS) & 0xff;
+            g = (((x1 + y1) * 9) >> FRAC_BITS) & 0xff;
+            b = ((x1 * 5) >> FRAC_BITS) & 0xff;
+            put_pixel(x, y, r, g, b);
+        }
+    }
+
+    /* then some noise with very high intensity to test saturation */
+    seed1 = num;
+    for(y=0;y<NOISE_W;y++) {
+        for(x=0;x<NOISE_W;x++) {
+            r = myrnd(&seed1, 256);
+            g = myrnd(&seed1, 256);
+            b = myrnd(&seed1, 256);
+            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];
+        seed1 = i;
+        for(y=0;y<p->h;y++) {
+            for(x=0;x<p->w;x++) {
+                r = p->r;
+                g = p->g;
+                b = p->b;
+                /* add a per object noise */
+                r += myrnd(&seed1, 50);
+                g += myrnd(&seed1, 50);
+                b += myrnd(&seed1, 50);
+                put_pixel(x + p->x, y + p->y, r, g, b);
+            }
+        }
+        p->x += myrnd(&seed, 21) - 10;
+        p->y += myrnd(&seed, 21) - 10;
+    }
+}
+
+int main(int argc, char **argv)
+{
+    int w, h, i;
+    char buf[1024];
+
+    if (argc != 2) {
+        printf("usage: %s file\n"
+               "generate a test video stream\n", argv[0]);
+        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;
+
+    rgb_tab = malloc(w * h * 3);
+    wrap = w * 3;
+    width = w;
+    height = h;
+
+    for(i=0;i<DEFAULT_NB_PICT;i++) {
+        snprintf(buf, sizeof(buf), "%s%d.pgm", argv[1], i);
+        gen_image(i, w, h);
+        pgmyuv_save(buf, w, h, rgb_tab);
+    }
+    
+    free(rgb_tab);
+    return 0;
+}