# HG changeset patch
# User John Tsiombikas <nuclear@member.fsf.org>
# Date 1299437610 -7200
# Node ID b50fd6f249758c434173848a4ca8e9faa0d53fb7
# Parent  265a24704ff2d3aa7040a834b43458fc1a95526a
implemented pause

diff -r 265a24704ff2 -r b50fd6f24975 src/stereoplay.c
--- a/src/stereoplay.c	Sun Mar 06 20:31:18 2011 +0200
+++ b/src/stereoplay.c	Sun Mar 06 20:53:30 2011 +0200
@@ -28,12 +28,14 @@
 void keyb(unsigned char key, int x, int y);
 void skeyb(int key, int x, int y);
 void sig(int s);
+void sig_decode(int s);
 void *shmalloc(size_t sz);
 
 struct video_file *vf;
 uint32_t *img;
 int vid_xsz, vid_ysz, win_xsz, win_ysz;
 unsigned int tex, sdr;
+int decode_pid;
 int pfd[2], xsock = -1;
 int upd_frame;
 int fullscr;
@@ -43,7 +45,6 @@
 
 int main(int argc, char **argv)
 {
-	int pid;
 	char *stereo_combiner, *sdrfile;
 
 	atexit(cleanup);
@@ -102,10 +103,10 @@
 
 	signal(SIGCHLD, sig);
 
-	if((pid = fork()) == -1) {
+	if((decode_pid = fork()) == -1) {
 		perror("failed to fork video decoding process");
 		return 1;
-	} else if(pid) {
+	} else if(decode_pid) {
 		close(pfd[1]);
 	} else {
 		close(pfd[0]);
@@ -160,6 +161,8 @@
 	close(pfd[0]);
 }
 
+static int paused;
+
 /* decoding_loop() runs in a separate decoding process and communicates
  * with the parent process through the pfd[1] pipe.
  */
@@ -171,6 +174,8 @@
 	unsigned long frame_nsec = vid_frame_interval(vf) * 1000;
 	printf("nanosecs per frame: %lu\n", frame_nsec);
 
+	signal(SIGUSR1, sig_decode);
+
 	gettimeofday(&tv0, 0);
 
 	while(vid_get_frame(vf, img) != -1) {
@@ -182,6 +187,10 @@
 		ts.tv_nsec = frame_nsec - (tv.tv_usec - tv0.tv_usec) * 1000;
 		nanosleep(&ts, 0);
 
+		while(paused) {
+			pause();
+		}
+
 		gettimeofday(&tv0, 0);
 	}
 
@@ -234,7 +243,7 @@
 		break;
 
 	case ' ':
-		/* TODO pause/resume */
+		kill(decode_pid, SIGUSR1);
 		break;
 
 	case 's':
@@ -292,6 +301,15 @@
 	}
 }
 
+void sig_decode(int s)
+{
+	signal(s, sig_decode);
+
+	if(s == SIGUSR1) {
+		paused = !paused;
+	}
+}
+
 void *shmalloc(size_t sz)
 {
 	int fd;