From bbe89da068e007184794faab6172f819027c8882 Mon Sep 17 00:00:00 2001
From: Alexandre Ratchov <ratchov@cvs.openbsd.org>
Date: Thu, 14 Aug 2008 09:47:52 +0000
Subject: add an "AUTOQUIT" flag to mix and sub aprocs. If the flag is set, the
 mix aproc will exit once there are no more input streams, similarly the sub
 aproc will exit once there are no more ouput streams. If the flag is not set,
 the mix aproc will generate silence, and the sub aproc will drop samples. By
 default this flag is set, so no behaviour change.

ok jakemsr
---
 usr.bin/aucat/aproc.c | 6 +++---
 usr.bin/aucat/aproc.h | 8 +++++---
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/usr.bin/aucat/aproc.c b/usr.bin/aucat/aproc.c
index f780d456e18..aa358a71052 100644
--- a/usr.bin/aucat/aproc.c
+++ b/usr.bin/aucat/aproc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: aproc.c,v 1.8 2008/08/14 09:45:23 ratchov Exp $	*/
+/*	$OpenBSD: aproc.c,v 1.9 2008/08/14 09:47:51 ratchov Exp $	*/
 /*
  * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
  *
@@ -395,7 +395,7 @@ mix_out(struct aproc *p, struct abuf *obuf)
 	}
 	if (ocount == 0)
 		return 0;
-	if (LIST_EMPTY(&p->ibuflist)) {
+	if (LIST_EMPTY(&p->ibuflist) && (p->u.mix.flags & MIX_AUTOQUIT)) {
 		DPRINTF("mix_out: nothing more to do...\n");
 		obuf->wproc = NULL;
 		aproc_del(p);
@@ -600,7 +600,7 @@ sub_hup(struct aproc *p, struct abuf *obuf)
 
 	DPRINTF("sub_hup: %s: detached\n", p->name);
 	sub_rm(p, obuf);
-	if (LIST_EMPTY(&p->obuflist)) {
+	if (LIST_EMPTY(&p->obuflist) && (p->u.sub.flags & SUB_AUTOQUIT)) {
 		abuf_hup(ibuf);
 		aproc_del(p);
 	} else
diff --git a/usr.bin/aucat/aproc.h b/usr.bin/aucat/aproc.h
index 51dac1155ac..26cd5a77136 100644
--- a/usr.bin/aucat/aproc.h
+++ b/usr.bin/aucat/aproc.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: aproc.h,v 1.3 2008/08/14 09:45:23 ratchov Exp $	*/
+/*	$OpenBSD: aproc.h,v 1.4 2008/08/14 09:47:51 ratchov Exp $	*/
 /*
  * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
  *
@@ -136,11 +136,13 @@ struct aproc {
 			struct aconv ist, ost;
 		} conv;
 		struct {
-#define MIX_DROP 1
+#define MIX_DROP	1
+#define MIX_AUTOQUIT	2
 			unsigned flags;
 		} mix;
 		struct {
-#define SUB_DROP 1
+#define SUB_DROP	1
+#define SUB_AUTOQUIT	2
 			unsigned flags;
 		} sub;
 	} u;
-- 
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