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+#ifndef foointrospecthfoo
+#define foointrospecthfoo
+
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio 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.
+
+ PulseAudio 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 PulseAudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#include <inttypes.h>
+
+#include <pulse/operation.h>
+#include <pulse/context.h>
+#include <pulse/cdecl.h>
+#include <pulse/channelmap.h>
+#include <pulse/volume.h>
+
+/** \page introspect Server Query and Control
+ *
+ * \section overv_sec Overview
+ *
+ * Sometimes it is necessary to query and modify global settings in the
+ * server. For this, Polypaudio has the introspection API. It can list sinks,
+ * sources, samples and other aspects of the server. It can also modify the
+ * attributes of the server that will affect operations on a global level,
+ * and not just the application's context.
+ *
+ * \section query_sec Querying
+ *
+ * All querying is done through callbacks. This design is necessary to
+ * maintain an asynchronous design. The client will request the information
+ * and some time later, the server will respond with the desired data.
+ *
+ * Some objects can have multiple entries at the server. When requesting all
+ * of these at once, the callback will be called multiple times, once for
+ * each object. When the list has been exhausted, the callback will be called
+ * without an information structure and the eol parameter set to a non-zero
+ * value.
+ *
+ * Note that even if a single object is requested, and not the entire list,
+ * the terminating call will still be made.
+ *
+ * If an error occurs, the callback will be called without and information
+ * structure and eol set to zero.
+ *
+ * Data members in the information structures are only valid during the
+ * duration of the callback. If they are required after the callback is
+ * finished, a deep copy must be performed.
+ *
+ * \subsection server_subsec Server Information
+ *
+ * The server can be queried about its name, the environment it's running on
+ * and the currently active global defaults. Calling
+ * pa_context_get_server_info() will get access to a pa_server_info structure
+ * containing all of these.
+ *
+ * \subsection memstat_subsec Memory Usage
+ *
+ * Statistics about memory usage can be fetched using pa_context_stat(),
+ * giving a pa_stat_info structure.
+ *
+ * \subsection sinksrc_subsec Sinks and Sources
+ *
+ * The server can have an arbitrary number of sinks and sources. Each sink
+ * and source have both an index and a name associated with it. As such
+ * there are three ways to get access to them:
+ *
+ * \li By index - pa_context_get_sink_info_by_index() /
+ * pa_context_get_source_info_by_index()
+ * \li By name - pa_context_get_sink_info_by_name() /
+ * pa_context_get_source_info_by_name()
+ * \li All - pa_context_get_sink_info_list() /
+ * pa_context_get_source_info_list()
+ *
+ * All three method use the same callback and will provide a pa_sink_info or
+ * pa_source_info structure.
+ *
+ * \subsection siso_subsec Sink Inputs and Source Outputs
+ *
+ * Sink inputs and source outputs are the representations of the client ends
+ * of streams inside the server. I.e. they connect a client stream to one of
+ * the global sinks or sources.
+ *
+ * Sink inputs and source outputs only have an index to identify them. As
+ * such, there are only two ways to get information about them:
+ *
+ * \li By index - pa_context_get_sink_input_info() /
+ * pa_context_get_source_output_info()
+ * \li All - pa_context_get_sink_input_info_list() /
+ * pa_context_get_source_output_info_list()
+ *
+ * The structure returned is the pa_sink_input_info or pa_source_output_info
+ * structure.
+ *
+ * \subsection samples_subsec Samples
+ *
+ * The list of cached samples can be retrieved from the server. Three methods
+ * exist for querying the sample cache list:
+ *
+ * \li By index - pa_context_get_sample_info_by_index()
+ * \li By name - pa_context_get_sample_info_by_name()
+ * \li All - pa_context_get_sample_info_list()
+ *
+ * Note that this only retrieves information about the sample, not the sample
+ * data itself.
+ *
+ * \subsection module_subsec Driver Modules
+ *
+ * Polypaudio driver modules are identified by index and are retrieved using either
+ * pa_context_get_module_info() or pa_context_get_module_info_list(). The
+ * information structure is called pa_module_info.
+ *
+ * \subsection autoload_subsec Autoload Entries
+ *
+ * Modules can be autoloaded as a result of a client requesting a certain
+ * sink or source. This mapping between sink/source names and modules can be
+ * queried from the server:
+ *
+ * \li By index - pa_context_get_autoload_info_by_index()
+ * \li By sink/source name - pa_context_get_autoload_info_by_name()
+ * \li All - pa_context_get_autoload_info_list()
+ *
+ * \subsection client_subsec Clients
+ *
+ * Polypaudio clients are also identified by index and are retrieved using
+ * either pa_context_get_client_info() or pa_context_get_client_info_list().
+ * The information structure is called pa_client_info.
+ *
+ * \section ctrl_sec Control
+ *
+ * Some parts of the server are only possible to read, but most can also be
+ * modified in different ways. Note that these changes will affect all
+ * connected clients and not just the one issuing the request.
+ *
+ * \subsection sinksrc_subsec Sinks and Sources
+ *
+ * The most common change one would want to do to sinks and sources is to
+ * modify the volume of the audio. Identical to how sinks and sources can
+ * be queried, there are two ways of identifying them:
+ *
+ * \li By index - pa_context_set_sink_volume_by_index() /
+ * pa_context_set_source_volume_by_index()
+ * \li By name - pa_context_set_sink_volume_by_name() /
+ * pa_context_set_source_volume_by_name()
+ *
+ * It is also possible to mute a sink or source:
+ *
+ * \li By index - pa_context_set_sink_mute_by_index() /
+ * pa_context_set_source_mute_by_index()
+ * \li By name - pa_context_set_sink_mute_by_name() /
+ * pa_context_set_source_mute_by_name()
+ *
+ * \subsection siso_subsec Sink Inputs and Source Outputs
+ *
+ * If an application desires to modify the volume of just a single stream
+ * (commonly one of its own streams), this can be done by setting the volume
+ * of its associated sink input, using pa_context_set_sink_input_volume().
+ *
+ * There is no support for modifying the volume of source outputs.
+ *
+ * It is also possible to remove sink inputs and source outputs, terminating
+ * the streams associated with them:
+ *
+ * \li Sink input - pa_context_kill_sink_input()
+ * \li Source output - pa_context_kill_source_output()
+ *
+ * \subsection module_subsec Modules
+ *
+ * Server modules can be remotely loaded and unloaded using
+ * pa_context_load_module() and pa_context_unload_module().
+ *
+ * \subsection autoload_subsec Autoload Entries
+ *
+ * New module autoloading rules can be added, and existing can be removed
+ * using pa_context_add_autoload() and pa_context_remove_autoload_by_index()
+ * / pa_context_remove_autoload_by_name().
+ *
+ * \subsection client_subsec Clients
+ *
+ * The only operation supported on clients, is the possibility of kicking
+ * them off the server using pa_context_kill_client().
+ */
+
+/** \file
+ *
+ * Routines for daemon introspection.
+ */
+
+PA_C_DECL_BEGIN
+
+/** Stores information about sinks */
+typedef struct pa_sink_info {
+ const char *name; /**< Name of the sink */
+ uint32_t index; /**< Index of the sink */
+ const char *description; /**< Description of this sink */
+ pa_sample_spec sample_spec; /**< Sample spec of this sink */
+ pa_channel_map channel_map; /**< Channel map \since 0.8 */
+ uint32_t owner_module; /**< Index of the owning module of this sink, or PA_INVALID_INDEX */
+ pa_cvolume volume; /**< Volume of the sink */
+ int mute; /**< Mute switch of the sink \since 0.8 */
+ uint32_t monitor_source; /**< Index of the monitor source connected to this sink */
+ const char *monitor_source_name; /**< The name of the monitor source */
+ pa_usec_t latency; /**< Length of filled playback buffer of this sink */
+ const char *driver; /**< Driver name. \since 0.8 */
+ pa_sink_flags_t flags; /**< Flags \since 0.8 */
+} pa_sink_info;
+
+/** Callback prototype for pa_context_get_sink_info_by_name() and friends */
+typedef void (*pa_sink_info_cb_t)(pa_context *c, const pa_sink_info *i, int eol, void *userdata);
+
+/** Get information about a sink by its name */
+pa_operation* pa_context_get_sink_info_by_name(pa_context *c, const char *name, pa_sink_info_cb_t cb, void *userdata);
+
+/** Get information about a sink by its index */
+pa_operation* pa_context_get_sink_info_by_index(pa_context *c, uint32_t id, pa_sink_info_cb_t cb, void *userdata);
+
+/** Get the complete sink list */
+pa_operation* pa_context_get_sink_info_list(pa_context *c, pa_sink_info_cb_t cb, void *userdata);
+
+/** Stores information about sources */
+typedef struct pa_source_info {
+ const char *name ; /**< Name of the source */
+ uint32_t index; /**< Index of the source */
+ const char *description; /**< Description of this source */
+ pa_sample_spec sample_spec; /**< Sample spec of this source */
+ pa_channel_map channel_map; /**< Channel map \since 0.8 */
+ uint32_t owner_module; /**< Owning module index, or PA_INVALID_INDEX */
+ pa_cvolume volume; /**< Volume of the source \since 0.8 */
+ int mute; /**< Mute switch of the sink \since 0.8 */
+ uint32_t monitor_of_sink; /**< If this is a monitor source the index of the owning sink, otherwise PA_INVALID_INDEX */
+ const char *monitor_of_sink_name; /**< Name of the owning sink, or PA_INVALID_INDEX */
+ pa_usec_t latency; /**< Length of filled record buffer of this source. \since 0.5 */
+ const char *driver; /**< Driver name \since 0.8 */
+ pa_source_flags_t flags; /**< Flags \since 0.8 */
+} pa_source_info;
+
+/** Callback prototype for pa_context_get_source_info_by_name() and friends */
+typedef void (*pa_source_info_cb_t)(pa_context *c, const pa_source_info *i, int eol, void *userdata);
+
+/** Get information about a source by its name */
+pa_operation* pa_context_get_source_info_by_name(pa_context *c, const char *name, pa_source_info_cb_t cb, void *userdata);
+
+/** Get information about a source by its index */
+pa_operation* pa_context_get_source_info_by_index(pa_context *c, uint32_t id, pa_source_info_cb_t cb, void *userdata);
+
+/** Get the complete source list */
+pa_operation* pa_context_get_source_info_list(pa_context *c, pa_source_info_cb_t cb, void *userdata);
+
+/** Server information */
+typedef struct pa_server_info {
+ const char *user_name; /**< User name of the daemon process */
+ const char *host_name; /**< Host name the daemon is running on */
+ const char *server_version; /**< Version string of the daemon */
+ const char *server_name; /**< Server package name (usually "pulseaudio") */
+ pa_sample_spec sample_spec; /**< Default sample specification */
+ const char *default_sink_name; /**< Name of default sink. \since 0.4 */
+ const char *default_source_name; /**< Name of default sink. \since 0.4*/
+ uint32_t cookie; /**< A random cookie for identifying this instance of pulseaudio. \since 0.8 */
+} pa_server_info;
+
+/** Callback prototype for pa_context_get_server_info() */
+typedef void (*pa_server_info_cb_t) (pa_context *c, const pa_server_info*i, void *userdata);
+
+/** Get some information about the server */
+pa_operation* pa_context_get_server_info(pa_context *c, pa_server_info_cb_t cb, void *userdata);
+
+/** Stores information about modules */
+typedef struct pa_module_info {
+ uint32_t index; /**< Index of the module */
+ const char*name, /**< Name of the module */
+ *argument; /**< Argument string of the module */
+ uint32_t n_used; /**< Usage counter or PA_INVALID_INDEX */
+ int auto_unload; /**< Non-zero if this is an autoloaded module */
+} pa_module_info;
+
+/** Callback prototype for pa_context_get_module_info() and firends*/
+typedef void (*pa_module_info_cb_t) (pa_context *c, const pa_module_info*i, int eol, void *userdata);
+
+/** Get some information about a module by its index */
+pa_operation* pa_context_get_module_info(pa_context *c, uint32_t idx, pa_module_info_cb_t cb, void *userdata);
+
+/** Get the complete list of currently loaded modules */
+pa_operation* pa_context_get_module_info_list(pa_context *c, pa_module_info_cb_t cb, void *userdata);
+
+/** Stores information about clients */
+typedef struct pa_client_info {
+ uint32_t index; /**< Index of this client */
+ const char *name; /**< Name of this client */
+ uint32_t owner_module; /**< Index of the owning module, or PA_INVALID_INDEX */
+ const char *driver; /**< Driver name \since 0.8 */
+} pa_client_info;
+
+/** Callback prototype for pa_context_get_client_info() and firends*/
+typedef void (*pa_client_info_cb_t) (pa_context *c, const pa_client_info*i, int eol, void *userdata);
+
+/** Get information about a client by its index */
+pa_operation* pa_context_get_client_info(pa_context *c, uint32_t idx, pa_client_info_cb_t cb, void *userdata);
+
+/** Get the complete client list */
+pa_operation* pa_context_get_client_info_list(pa_context *c, pa_client_info_cb_t cb, void *userdata);
+
+/** Stores information about sink inputs */
+typedef struct pa_sink_input_info {
+ uint32_t index; /**< Index of the sink input */
+ const char *name; /**< Name of the sink input */
+ uint32_t owner_module; /**< Index of the module this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any module */
+ uint32_t client; /**< Index of the client this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any client */
+ uint32_t sink; /**< Index of the connected sink */
+ pa_sample_spec sample_spec; /**< The sample specification of the sink input */
+ pa_channel_map channel_map; /**< Channel map */
+ pa_cvolume volume; /**< The volume of this sink input */
+ pa_usec_t buffer_usec; /**< Latency due to buffering in sink input, see pa_latency_info for details */
+ pa_usec_t sink_usec; /**< Latency of the sink device, see pa_latency_info for details */
+ const char *resample_method; /**< Thre resampling method used by this sink input. \since 0.7 */
+ const char *driver; /**< Driver name \since 0.8 */
+} pa_sink_input_info;
+
+/** Callback prototype for pa_context_get_sink_input_info() and firends*/
+typedef void (*pa_sink_input_info_cb_t) (pa_context *c, const pa_sink_input_info *i, int eol, void *userdata);
+
+/** Get some information about a sink input by its index */
+pa_operation* pa_context_get_sink_input_info(pa_context *c, uint32_t idx, pa_sink_input_info_cb_t cb, void *userdata);
+
+/** Get the complete sink input list */
+pa_operation* pa_context_get_sink_input_info_list(pa_context *c, pa_sink_input_info_cb_t cb, void *userdata);
+
+/** Stores information about source outputs */
+typedef struct pa_source_output_info {
+ uint32_t index; /**< Index of the sink input */
+ const char *name; /**< Name of the sink input */
+ uint32_t owner_module; /**< Index of the module this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any module */
+ uint32_t client; /**< Index of the client this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any client */
+ uint32_t source; /**< Index of the connected source */
+ pa_sample_spec sample_spec; /**< The sample specification of the source output */
+ pa_channel_map channel_map; /**< Channel map */
+ pa_usec_t buffer_usec; /**< Latency due to buffering in the source output, see pa_latency_info for details. \since 0.5 */
+ pa_usec_t source_usec; /**< Latency of the source device, see pa_latency_info for details. \since 0.5 */
+ const char *resample_method; /**< Thre resampling method used by this source output. \since 0.7 */
+ const char *driver; /**< Driver name \since 0.8 */
+} pa_source_output_info;
+
+/** Callback prototype for pa_context_get_source_output_info() and firends*/
+typedef void (*pa_source_output_info_cb_t) (pa_context *c, const pa_source_output_info *i, int eol, void *userdata);
+
+/** Get information about a source output by its index */
+pa_operation* pa_context_get_source_output_info(pa_context *c, uint32_t idx, pa_source_output_info_cb_t cb, void *userdata);
+
+/** Get the complete list of source outputs */
+pa_operation* pa_context_get_source_output_info_list(pa_context *c, pa_source_output_info_cb_t cb, void *userdata);
+
+/** Set the volume of a sink device specified by its index */
+pa_operation* pa_context_set_sink_volume_by_index(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
+
+/** Set the volume of a sink device specified by its name */
+pa_operation* pa_context_set_sink_volume_by_name(pa_context *c, const char *name, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
+
+/** Set the mute switch of a sink device specified by its index \since 0.8 */
+pa_operation* pa_context_set_sink_mute_by_index(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);
+
+/** Set the mute switch of a sink device specified by its name \since 0.8 */
+pa_operation* pa_context_set_sink_mute_by_name(pa_context *c, const char *name, int mute, pa_context_success_cb_t cb, void *userdata);
+
+/** Set the volume of a sink input stream */
+pa_operation* pa_context_set_sink_input_volume(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
+
+/** Set the volume of a source device specified by its index \since 0.8 */
+pa_operation* pa_context_set_source_volume_by_index(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
+
+/** Set the volume of a source device specified by its name \since 0.8 */
+pa_operation* pa_context_set_source_volume_by_name(pa_context *c, const char *name, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);
+
+/** Set the mute switch of a source device specified by its index \since 0.8 */
+pa_operation* pa_context_set_source_mute_by_index(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);
+
+/** Set the mute switch of a source device specified by its name \since 0.8 */
+pa_operation* pa_context_set_source_mute_by_name(pa_context *c, const char *name, int mute, pa_context_success_cb_t cb, void *userdata);
+
+/** Memory block statistics */
+typedef struct pa_stat_info {
+ uint32_t memblock_total; /**< Currently allocated memory blocks */
+ uint32_t memblock_total_size; /**< Currentl total size of allocated memory blocks */
+ uint32_t memblock_allocated; /**< Allocated memory blocks during the whole lifetime of the daemon */
+ uint32_t memblock_allocated_size; /**< Total size of all memory blocks allocated during the whole lifetime of the daemon */
+ uint32_t scache_size; /**< Total size of all sample cache entries. \since 0.4 */
+} pa_stat_info;
+
+/** Callback prototype for pa_context_stat() */
+typedef void (*pa_stat_info_cb_t) (pa_context *c, const pa_stat_info *i, void *userdata);
+
+/** Get daemon memory block statistics */
+pa_operation* pa_context_stat(pa_context *c, pa_stat_info_cb_t cb, void *userdata);
+
+/** Stores information about sample cache entries */
+typedef struct pa_sample_info {
+ uint32_t index; /**< Index of this entry */
+ const char *name; /**< Name of this entry */
+ pa_cvolume volume; /**< Default volume of this entry */
+ pa_sample_spec sample_spec; /**< Sample specification of the sample */
+ pa_channel_map channel_map; /**< The channel map */
+ pa_usec_t duration; /**< Duration of this entry */
+ uint32_t bytes; /**< Length of this sample in bytes. \since 0.4 */
+ int lazy; /**< Non-zero when this is a lazy cache entry. \since 0.5 */
+ const char *filename; /**< In case this is a lazy cache entry, the filename for the sound file to be loaded on demand. \since 0.5 */
+} pa_sample_info;
+
+/** Callback prototype for pa_context_get_sample_info_by_name() and firends */
+typedef void (*pa_sample_info_cb_t)(pa_context *c, const pa_sample_info *i, int eol, void *userdata);
+
+/** Get information about a sample by its name */
+pa_operation* pa_context_get_sample_info_by_name(pa_context *c, const char *name, pa_sample_info_cb_t cb, void *userdata);
+
+/** Get information about a sample by its index */
+pa_operation* pa_context_get_sample_info_by_index(pa_context *c, uint32_t idx, pa_sample_info_cb_t cb, void *userdata);
+
+/** Get the complete list of samples stored in the daemon. */
+pa_operation* pa_context_get_sample_info_list(pa_context *c, pa_sample_info_cb_t cb, void *userdata);
+
+/** Kill a client. \since 0.5 */
+pa_operation* pa_context_kill_client(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);
+
+/** Kill a sink input. \since 0.5 */
+pa_operation* pa_context_kill_sink_input(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);
+
+/** Kill a source output. \since 0.5 */
+pa_operation* pa_context_kill_source_output(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);
+
+/** Callback prototype for pa_context_load_module() and pa_context_add_autoload() */
+typedef void (*pa_context_index_cb_t)(pa_context *c, uint32_t idx, void *userdata);
+
+/** Load a module. \since 0.5 */
+pa_operation* pa_context_load_module(pa_context *c, const char*name, const char *argument, pa_context_index_cb_t cb, void *userdata);
+
+/** Unload a module. \since 0.5 */
+pa_operation* pa_context_unload_module(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);
+
+/** Type of an autoload entry. \since 0.5 */
+typedef enum pa_autoload_type {
+ PA_AUTOLOAD_SINK = 0,
+ PA_AUTOLOAD_SOURCE = 1
+} pa_autoload_type_t;
+
+/** Stores information about autoload entries. \since 0.5 */
+typedef struct pa_autoload_info {
+ uint32_t index; /**< Index of this autoload entry */
+ const char *name; /**< Name of the sink or source */
+ pa_autoload_type_t type; /**< Type of the autoload entry */
+ const char *module; /**< Module name to load */
+ const char *argument; /**< Argument string for module */
+} pa_autoload_info;
+
+/** Callback prototype for pa_context_get_autoload_info_by_name() and firends */
+typedef void (*pa_autoload_info_cb_t)(pa_context *c, const pa_autoload_info *i, int eol, void *userdata);
+
+/** Get info about a specific autoload entry. \since 0.6 */
+pa_operation* pa_context_get_autoload_info_by_name(pa_context *c, const char *name, pa_autoload_type_t type, pa_autoload_info_cb_t cb, void *userdata);
+
+/** Get info about a specific autoload entry. \since 0.6 */
+pa_operation* pa_context_get_autoload_info_by_index(pa_context *c, uint32_t idx, pa_autoload_info_cb_t cb, void *userdata);
+
+/** Get the complete list of autoload entries. \since 0.5 */
+pa_operation* pa_context_get_autoload_info_list(pa_context *c, pa_autoload_info_cb_t cb, void *userdata);
+
+/** Add a new autoload entry. \since 0.5 */
+pa_operation* pa_context_add_autoload(pa_context *c, const char *name, pa_autoload_type_t type, const char *module, const char*argument, pa_context_index_cb_t, void* userdata);
+
+/** Remove an autoload entry. \since 0.6 */
+pa_operation* pa_context_remove_autoload_by_name(pa_context *c, const char *name, pa_autoload_type_t type, pa_context_success_cb_t cb, void* userdata);
+
+/** Remove an autoload entry. \since 0.6 */
+pa_operation* pa_context_remove_autoload_by_index(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void* userdata);
+
+
+PA_C_DECL_END
+
+#endif