shithub: pplay

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fix panning bounding bugs

--- a/cmd.c

+++ b/cmd.c

@@ -114,6 +114,7 @@

 {

 	Chunk *c;

+	assert(p < totalsz);

 	c = norris.right;

 	while(p > c->bufsz){

 		p -= c->bufsz;

@@ -261,6 +262,10 @@

 	usize Δbuf, Δloop, m, off, Δ;

 	Chunk *c;

+	if(d.pos >= totalsz){

+		*boff = 0;

+		return nil;

+	}

 	c = p2c(d.pos, &off);

 	p = c->buf + off;

 	m = n;

--- a/draw.c

+++ b/draw.c

@@ -95,7 +95,8 @@

 			p = getbuf(d, n, sbuf, &n);

 			qunlock(&lsync);

 			if(p == nil){

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

+				if(n > 0)

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

 				goto end;

 			}

 			d.pos += n;

@@ -127,7 +128,7 @@

 			if(stereo)

 				draw(viewbg, r, col[Csamp], nil, ZP);

 			unlockdisplay(display);

-			x++;

+			x = (d.pos - views) / T;

 		}

 	}

 }

@@ -207,8 +208,6 @@

 	lockdisplay(display);

 	drawview();

 	x = screen->r.min.x + (p - views) / T;

-	//if(liner.min.x == x || p < views && x > liner.min.x)

-	//	return;

 	draw(screen, screen->r, view, nil, ZP);

 	liner.min.x = x;

 	liner.max.x = x + 1;

@@ -239,10 +238,20 @@

 void

 setpan(int Δx)

 {

+	usize new;

+

 	Δx *= T;

-	if(zoom == 1 || views == 0 && Δx < 0 || views >= viewmax && Δx > 0)

+	if(zoom == 1)

 		return;

-	views += Δx;

+	if(Δx < 0 && -Δx > views)

+		new = 0;

+	else if(views + Δx >= viewmax)

+		new = viewmax;

+	else

+		new = views + Δx;

+	if(new == views)

+		return;

+	views = new;

 	redraw(0);

 }