From 50c12df7e2632fe0abdbe48821036ca9be67b7a3 Mon Sep 17 00:00:00 2001
From: joq <joq@0c269be4-1314-0410-8aa9-9f06e86f4224>
Date: Sun, 28 Sep 2003 03:31:10 +0000
Subject: [PATCH] [0.83.2] jack_set_buffer_size() "alpha test" version

git-svn-id: svn+ssh://jackaudio.org/trunk/jack@513 0c269be4-1314-0410-8aa9-9f06e86f4224
---
 configure.in                |  2 +-
 example-clients/.cvsignore  |  1 +
 example-clients/Makefile.am |  5 ++
 example-clients/bufsize.c   | 96 +++++++++++++++++++++++++++++++++++++
 jackd/engine.c              |  9 ++--
 5 files changed, 109 insertions(+), 4 deletions(-)
 create mode 100644 example-clients/bufsize.c

diff --git a/configure.in b/configure.in
index d50a77c..c440f53 100644
--- a/configure.in
+++ b/configure.in
@@ -14,7 +14,7 @@ dnl                 changes are made
 dnl ---
 JACK_MAJOR_VERSION=0
 JACK_MINOR_VERSION=83
-JACK_MICRO_VERSION=1
+JACK_MICRO_VERSION=2
 
 dnl ---
 dnl HOWTO: updating the jack protocal version
diff --git a/example-clients/.cvsignore b/example-clients/.cvsignore
index dd43b81..a204f88 100644
--- a/example-clients/.cvsignore
+++ b/example-clients/.cvsignore
@@ -10,6 +10,7 @@ jack_impulse_grabber
 jack_monitor_client
 jack_simple_client
 jackrec
+jack_bufsize
 jack_showtime
 jack_lsp
 jack_metro
diff --git a/example-clients/Makefile.am b/example-clients/Makefile.am
index 7f38cb7..48333d8 100644
--- a/example-clients/Makefile.am
+++ b/example-clients/Makefile.am
@@ -33,6 +33,7 @@ bin_PROGRAMS = jack_load \
 	       jack_disconnect \
 	       jack_metro \
 	       jack_showtime \
+               jack_bufsize \
 	       jack_lsp \
 	       $(JACKREC) \
 	       $(JACK_TRANSPORT)
@@ -73,6 +74,10 @@ jack_showtime_SOURCES = showtime.c
 jack_showtime_LDFLAGS = -lrt -ldl -lpthread
 jack_showtime_LDADD = ../libjack/libjack.la
 
+jack_bufsize_SOURCES = bufsize.c
+jack_bufsize_LDFLAGS =
+jack_bufsize_LDADD = ../libjack/libjack.la
+
 
 if HAVE_SNDFILE
 jackrec_SOURCES = capture_client.c ringbuffer.c ringbuffer.h
diff --git a/example-clients/bufsize.c b/example-clients/bufsize.c
new file mode 100644
index 0000000..39e6718
--- /dev/null
+++ b/example-clients/bufsize.c
@@ -0,0 +1,96 @@
+/*
+ *  bufsize.c -- change JACK buffer size.
+ *
+ *  Copyright (C) 2003 Jack O'Quin.
+ *  
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <jack/jack.h>
+#include <jack/transport.h>
+
+char *package;				/* program name */
+jack_client_t *client;
+jack_nframes_t nframes;
+
+void jack_shutdown(void *arg)
+{
+	fprintf(stderr, "JACK shut down, exiting ...\n");
+	exit(1);
+}
+
+void signal_handler(int sig)
+{
+	jack_client_close(client);
+	fprintf(stderr, "signal received, exiting ...\n");
+	exit(0);
+}
+
+void parse_arguments(int argc, char *argv[])
+{
+
+	/* basename $0 */
+	package = strrchr(argv[0], '/');
+	if (package == 0)
+		package = argv[0];
+	else
+		package++;
+
+	if (argc < 2) {
+		fprintf(stderr, "usage: %s <bufsize>\n", package);
+		exit(9);
+	}
+
+	nframes = strtoul(argv[1], NULL, 0);
+	if (errno == ERANGE) {
+		fprintf(stderr, "%s: invalid buffer size: %s\n",
+			package, argv[1]);
+		exit(2);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	int rc;
+
+	parse_arguments(argc, argv);
+
+	/* become a JACK client */
+	if ((client = jack_client_new(package)) == 0) {
+		fprintf(stderr, "JACK server not running?\n");
+		exit(1);
+	}
+
+	signal(SIGQUIT, signal_handler);
+	signal(SIGTERM, signal_handler);
+	signal(SIGHUP, signal_handler);
+	signal(SIGINT, signal_handler);
+
+	jack_on_shutdown(client, jack_shutdown, 0);
+
+	rc = jack_set_buffer_size(client, nframes);
+	if (rc)
+		fprintf(stderr, "jack_set_buffer_size() returns %d\n", rc);
+
+	jack_client_close(client);
+
+	return rc;
+}
diff --git a/jackd/engine.c b/jackd/engine.c
index aa11c4b..21954c2 100644
--- a/jackd/engine.c
+++ b/jackd/engine.c
@@ -395,10 +395,13 @@ jack_resize_port_segment (jack_engine_t *engine,
 
 		/* update any existing output port offsets */
 		for (i = 0; i < engine->port_max; i++) {
-			if (engine->control->ports[i].flags|JackPortIsOutput &&
-			    engine->control->ports[i].ptype_id == ptid) {
+			if (engine->control->ports[i].flags & JackPortIsOutput
+			    && engine->control->ports[i].ptype_id == ptid) {
 				bi = engine->internal_ports[i].buffer_info;
-				engine->control->ports[i].offset = bi->offset;
+				if (bi) {
+					engine->control->ports[i].offset =
+						bi->offset;
+				}
 			}
 		}
 		pthread_mutex_unlock (&pti->buffer_lock);