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add stupid pause that does not sync audio and video (yet)

--- a/main.c

+++ b/main.c

@@ -25,6 +25,7 @@

 static Channel *audiofinished;

 static char info[256];

 static int showinfo;

+static int paused;

 static uvlong dispdelay;

 static int framedrop;

 static uvlong late;

@@ -43,7 +44,7 @@

 		fprint(2, "runaudio: %r\n");

 	}else{

 		for(s = x; Sread(s, &f) == 0 && f.sz > 0;){

-			if(!synced){

+			if(!synced || paused){

 				recvp(audiosync);

 				chanclose(audiosync);

 				synced = 1;

@@ -381,7 +382,16 @@

 			case Ckeyboard:

 				end = key == 'q' || key == Kdel;

 				done = key == '\n';

-				showinfo = key == 'i' ? !showinfo : showinfo;

+				showinfo ^= key == 'i';

+				if(key == 'p'){

+					if(!paused){

+						audiosync = chancreate(sizeof(void*), 1);

+						a[Cframe].op = CHANNOP;

+					}else{

+						a[Cframe].op = CHANRCV;

+					}

+					paused ^= 1;

+				}

 				forced = 1;

 				break;