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/*
Copyright (C) 2009 Grame
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.
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 <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <stdint.h>
#include "reserve.h"
#include "audio_reserve.h"
#include "jack/control.h"
#define DEVICE_MAX 2
typedef struct reserved_audio_device {
char device_name[64];
rd_device * reserved_device;
} reserved_audio_device;
static DBusConnection* gConnection = NULL;
static reserved_audio_device gReservedDevice[DEVICE_MAX];
static int gReserveCount = 0;
SERVER_EXPORT int audio_reservation_init()
{
DBusError error;
dbus_error_init(&error);
if (!(gConnection = dbus_bus_get(DBUS_BUS_SESSION, &error))) {
jack_error("Failed to connect to session bus for device reservation %s\n", error.message);
return -1;
}
jack_info("audio_reservation_init");
return 0;
}
SERVER_EXPORT int audio_reservation_finish()
{
if (gConnection) {
dbus_connection_unref(gConnection);
gConnection = NULL;
jack_info("audio_reservation_finish");
}
return 0;
}
SERVER_EXPORT bool audio_acquire(const char * device_name)
{
DBusError error;
int ret;
// Open DBus connection first time
if (gReserveCount == 0)
audio_reservation_init();
assert(gReserveCount < DEVICE_MAX);
if ((ret= rd_acquire(
&gReservedDevice[gReserveCount].reserved_device,
gConnection,
device_name,
"Jack audio server",
INT32_MAX,
NULL,
&error)) < 0) {
jack_error("Failed to acquire device name : %s error : %s", device_name, (error.message ? error.message : strerror(-ret)));
return false;
}
strcpy(gReservedDevice[gReserveCount].device_name, device_name);
gReserveCount++;
jack_info("Acquire audio card %s", device_name);
return true;
}
SERVER_EXPORT void audio_release(const char * device_name)
{
int i;
// Look for corresponding reserved device
for (i = 0; i < DEVICE_MAX; i++) {
if (strcmp(gReservedDevice[i].device_name, device_name) == 0)
break;
}
if (i < DEVICE_MAX) {
jack_info("Released audio card %s", device_name);
rd_release(gReservedDevice[i].reserved_device);
} else {
jack_error("Audio card %s not found!!", device_name);
}
// Close DBus connection last time
gReserveCount--;
if (gReserveCount == 0)
audio_reservation_finish();
}
SERVER_EXPORT void audio_reserve_loop()
{
if (gConnection != NULL) {
while (dbus_connection_read_write_dispatch (gConnection, -1))
; // empty loop body
}
}
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