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#ifndef foocontexthfoo
#define foocontexthfoo
/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio 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 Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <polyp/sample.h>
#include <polyp/def.h>
#include <polyp/mainloop-api.h>
#include <polyp/cdecl.h>
#include <polyp/operation.h>
/** \file
* Connection contexts for asynchrononous communication with a
* server. A pa_context object wraps a connection to a polypaudio
* server using its native protocol. A context may be used to issue
* commands on the server or to create playback or recording
* streams. Multiple playback streams may be piped through a single
* connection context. Operations on the contect involving
* communication with the server are executed asynchronously: i.e. the
* client function do not implicitely wait for completion of the
* operation on the server. Instead the caller specifies a call back
* function that is called when the operation is completed. Currently
* running operations may be canceled using pa_operation_cancel(). */
/** \example pacat.c
* A playback and recording tool using the asynchronous API */
/** \example paplay.c
* A sound file playback tool using the asynchronous API, based on libsndfile */
PA_C_DECL_BEGIN
/** An opaque connection context to a daemon */
typedef struct pa_context pa_context;
/** Generic notification callback prototype */
typedef void (*pa_context_notify_cb_t)(pa_context *c, void *userdata);
/** A generic callback for operation completion */
typedef void (*pa_context_success_cb_t) (pa_context *c, int success, void *userdata);
/** Instantiate a new connection context with an abstract mainloop API
* and an application name */
pa_context *pa_context_new(pa_mainloop_api *mainloop, const char *name);
/** Decrease the reference counter of the context by one */
void pa_context_unref(pa_context *c);
/** Increase the reference counter of the context by one */
pa_context* pa_context_ref(pa_context *c);
/** Set a callback function that is called whenever the context status changes */
void pa_context_set_state_callback(pa_context *c, pa_context_notify_cb_t cb, void *userdata);
/** Return the error number of the last failed operation */
int pa_context_errno(pa_context *c);
/** Return non-zero if some data is pending to be written to the connection */
int pa_context_is_pending(pa_context *c);
/** Return the current context status */
pa_context_state_t pa_context_get_state(pa_context *c);
/** Connect the context to the specified server. If server is NULL,
connect to the default server. This routine may but will not always
return synchronously on error. Use pa_context_set_state_callback() to
be notified when the connection is established. If flags doesn't have
PA_NOAUTOSPAWN set and no specific server is specified or accessible a
new daemon is spawned. If api is non-NULL, the functions specified in
the structure are used when forking a new child process. */
int pa_context_connect(pa_context *c, const char *server, pa_context_flags_t flags, const pa_spawn_api *api);
/** Terminate the context connection immediately */
void pa_context_disconnect(pa_context *c);
/** Drain the context. If there is nothing to drain, the function returns NULL */
pa_operation* pa_context_drain(pa_context *c, pa_context_notify_cb_t cb, void *userdata);
/** Tell the daemon to exit. The returned operation is unlikely to
* complete succesfully, since the daemon probably died before
* returning a success notification */
pa_operation* pa_context_exit_daemon(pa_context *c, pa_context_success_cb_t cb, void *userdata);
/** Set the name of the default sink. \since 0.4 */
pa_operation* pa_context_set_default_sink(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata);
/** Set the name of the default source. \since 0.4 */
pa_operation* pa_context_set_default_source(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata);
/** Returns 1 when the connection is to a local daemon. Returns negative when no connection has been made yet. \since 0.5 */
int pa_context_is_local(pa_context *c);
/** Set a different application name for context on the server. \since 0.5 */
pa_operation* pa_context_set_name(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata);
/** Return the server name this context is connected to. \since 0.7 */
const char* pa_context_get_server(pa_context *c);
/** Return the protocol version of the library. \since 0.8 */
uint32_t pa_context_get_protocol_version(pa_context *c);
/** Return the protocol version of the connected server. \since 0.8 */
uint32_t pa_context_get_server_protocol_version(pa_context *c);
PA_C_DECL_END
#endif
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