making act segmenter

1 files changed, 195 insertions, 0 deletions

diff --git a/ffmpeg/tests/rotozoom.c b/ffmpeg/tests/rotozoom.c
new file mode 100644
index 0000000..cfa7f81
--- /dev/null
+++ b/ffmpeg/tests/rotozoom.c
@@ -0,0 +1,195 @@
+/*
+ * Generate 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>
+
+#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;
+
+    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;
+}
+
+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 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[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));
+        }
+    }
+}
+
+#define W 256
+#define H 256
+
+static int init_demo(const char *filename)
+{
+    int i, j;
+    int h;
+    int radian;
+    char line[3 * W];
+
+    FILE *input_file;
+
+    input_file = fopen(filename, "rb");
+    if (!input_file) {
+        perror(filename);
+        return 1;
+    }
+
+    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;
+    }
+
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+    int w, h, i;
+    char buf[1024];
+    int isdir = 0;
+
+    if (argc != 3) {
+        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;
+
+    rgb_tab = malloc(w * h * 3);
+    wrap    = w * 3;
+    width   = w;
+    height  = h;
+
+    if (init_demo(argv[1]))
+        return 1;
+
+    for (i = 0; i < DEFAULT_NB_PICT; i++) {
+        gen_image(i, w, h);
+        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;
+}