Add clock_gettime() emulation.

[glcapture] / glcapture.c

diff --git a/glcapture.c b/glcapture.c
index c67c87d9e5dfb0a29b978b0b2d5d32c0e54f42b5..3bf71717756a7bc1ca95e1ac4b2ee81d20b175b0 100644 (file)
--- a/glcapture.c
+++ b/glcapture.c
@@ -3,7 +3,6 @@
  *
  * gcc -shared -fPIC -o glcapture.so glcapture.c -ldl
  * LD_PRELOAD=`pwd`/glcapture.so ./demo
- * for FILE in *.ppm; do convert -flip $FILE ${FILE/ppm/tga}; echo $FILE; done
  * mencoder -noskip -endpos 76.920 -ovc x264 -x264encopts bitrate=3000:pass=1 -audiofile data/Juledemo.ogg -o tufs.avi mf://\*.tga -mf fps=50 -oac mp3lame -lameopts cbr:br=128
  * mencoder -noskip -endpos 76.920 -ovc x264 -x264encopts bitrate=3000:pass=2 -audiofile data/Juledemo.ogg -o tufs.avi mf://\*.tga -mf fps=50 -oac mp3lame -lameopts cbr:br=128
  */
@@ -20,6 +19,7 @@
 
 #define WIDTH 640
 #define HEIGHT 480
+#define FPS 50
 
 static char buf[WIDTH * HEIGHT * 3];
 static int frameno = 0;
@@ -31,11 +31,20 @@ void glXSwapBuffers( Display *dpy, GLXDrawable drawable )
 
        FILE *ppm;
        char filename[256];
-       glReadPixels(0, 0, WIDTH, HEIGHT, GL_RGB, GL_UNSIGNED_BYTE, buf);
+       glReadPixels(0, 0, WIDTH, HEIGHT, GL_BGR, GL_UNSIGNED_BYTE, buf);
 
-       sprintf(filename, "frame%05u.ppm", frameno++);
+       sprintf(filename, "frame%05u.tga", frameno++);
        ppm = fopen(filename, "w");
-       fprintf(ppm, "P6\nWIDTH HEIGHT\n255\n");
+       fwrite("\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00", 12, 1, ppm);
+       {
+               unsigned short w = WIDTH;
+               fwrite(&w, 2, 1, ppm);
+       }
+       {
+               unsigned short h = HEIGHT;
+               fwrite(&h, 2, 1, ppm);
+       }
+       fwrite("\x18\x00", 2, 1, ppm);
        fwrite(buf, WIDTH*HEIGHT*3, 1, ppm);
        fclose(ppm);
 
@@ -45,7 +54,15 @@ void glXSwapBuffers( Display *dpy, GLXDrawable drawable )
 int gettimeofday(struct timeval *tv, struct timezone *tz)
 {
        printf("gettimeofday frame %u\n", frameno);
-       tv->tv_sec = frameno / 50;
-       tv->tv_usec = ((double)(frameno % 50) / 50) * 1000000;
+       tv->tv_sec = frameno / FPS;
+       tv->tv_usec = ((double)(frameno % FPS) / FPS) * 1000000;
+       return 0;
+}
+
+int clock_gettime(clockid_t clk_id, struct timespec *tp)
+{
+       tp->tv_sec = frameno / FPS;
+       tp->tv_nsec = ((double)(frameno % FPS) / FPS) * 1e9;
+
        return 0;
 }