git: 9front

Download patch

ref: 0f0a69743ba8457cd6177519b43928b0a2d3af68
parent: 004d4d296c5e89b8456f170436cfe5e9b1dd6352
author: cinap_lenrek <cinap_lenrek@gmx.de>
date: Fri Feb 1 10:23:38 EST 2013 

audio: fix delay control, increase default buffer delay to 40ms

just doing a single sleep isnt enougth, as we get woken
up for every block!


--- a/sys/src/9/pc/audioac97.c
+++ b/sys/src/9/pc/audioac97.c
@@ -381,7 +381,8 @@
 		}
 		p += n;
 	}
-	sleep(&ring->r, outrate, ctlr);
+	while(outrate(ctlr) == 0)
+		sleep(&ring->r, outrate, ctlr);
 	return p - (uchar*)vp;
 }
 
--- a/sys/src/9/pc/audiohda.c
+++ b/sys/src/9/pc/audiohda.c
@@ -1288,7 +1288,8 @@
 		p += n;
 	}
 	hdakick(ctlr);
-	sleep(&ring->r, outrate, ctlr);
+	while(outrate(ctlr) == 0)
+		sleep(&ring->r, outrate, ctlr);
 	return p - (uchar*)vp;
 }
 
--- a/sys/src/9/pc/audiosb16.c
+++ b/sys/src/9/pc/audiosb16.c
@@ -549,7 +549,8 @@
 		}
 		p += n;
 	}
-	sleep(&ctlr->vous, ratebuf, ctlr);
+	while(ratebuf(ctlr) == 0)
+		sleep(&ctlr->vous, ratebuf, ctlr);
 	return p - (uchar*)vp;
 }
 
--- a/sys/src/9/port/devaudio.c
+++ b/sys/src/9/port/devaudio.c
@@ -146,7 +146,7 @@
 	if((attached & i) == 0){
 		static char *settings[] = {
 			"speed 44100",
-			"delay 882",	/* 20 ms */
+			"delay 1764",	/* 40 ms */
 			"master 100",
 			"audio 100",
 			"head 100",
--- a/sys/src/cmd/nusb/audio/audio.c
+++ b/sys/src/cmd/nusb/audio/audio.c
@@ -14,7 +14,7 @@
 	int	maxfreq;
 };
 
-int audiodelay = 882;
+int audiodelay = 1764;	/* 40 ms */
 int audiofreq = 44100;
 int audiochan = 2;
 int audiores = 16;
-- 
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