1 #ifndef foosubscribehfoo 2 #define foosubscribehfoo 3 4 /* $Id: subscribe.h 1426 2007-02-13 15:35:19Z ossman $ */ 5 6 /*** 7 This file is part of PulseAudio. 8 9 Copyright 2004-2006 Lennart Poettering 10 Copyright 2006 Pierre Ossman <ossman (at) cendio.se> for Cendio AB 11 12 PulseAudio is free software; you can redistribute it and/or modify 13 it under the terms of the GNU Lesser General Public License as published 14 by the Free Software Foundation; either version 2 of the License, 15 or (at your option) any later version. 16 17 PulseAudio is distributed in the hope that it will be useful, but 18 WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 General Public License for more details. 21 22 You should have received a copy of the GNU Lesser General Public License 23 along with PulseAudio; if not, write to the Free Software 24 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 25 USA. 26 ***/ 27 28 #include <inttypes.h> 29 30 #include <pulse/def.h> 31 #include <pulse/context.h> 32 #include <pulse/cdecl.h> 33 34 /** \page subscribe Event Subscription 35 * 36 * \section overv_sec Overview 37 * 38 * The application can be notified, asynchronously, whenever the internal 39 * layout of the server changes. Possible notifications are desribed in the 40 * \ref pa_subscription_event_type and \ref pa_subscription_mask 41 * enumerations. 42 * 43 * The application sets the notification mask using pa_context_subscribe() 44 * and the function that will be called whenever a notification occurs using 45 * pa_context_set_subscribe_callback(). 46 */ 47 48 /** \file 49 * Daemon introspection event subscription subsystem. */ 50 51 PA_C_DECL_BEGIN 52 53 /** Subscription event callback prototype */ 54 typedef void (*pa_context_subscribe_cb_t)(pa_context *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata); 55 56 /** Enable event notification */ 57 pa_operation* pa_context_subscribe(pa_context *c, pa_subscription_mask_t m, pa_context_success_cb_t cb, void *userdata); 58 59 /** Set the context specific call back function that is called whenever the state of the daemon changes */ 60 void pa_context_set_subscribe_callback(pa_context *c, pa_context_subscribe_cb_t cb, void *userdata); 61 62 PA_C_DECL_END 63 64 #endif 65
