module pulse.introspect;

import pulse.def;
import pulse.sample;
import pulse.channelmap;
import pulse.volume;
import pulse.operation;
import pulse.context;
import pulse.proplist;
import pulse.format;


extern (C):

/***
  This file is part of PulseAudio.

  Copyright 2004-2006 Lennart Poettering
  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB

  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 2.1 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, see <http://www.gnu.org/licenses/>.
***/

/** \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, PulseAudio 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 approach 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 instances on 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 positive
 * 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 invoked without an information
 * structure and eol set to a negative value..
 *
 * 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 of the information structure 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() provides 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
 *
 * PulseAudio 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 client_subsec Clients
 *
 * PulseAudio 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 apply to sinks and sources is to
 * modify the volume of the audio. Identically 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 or source output, using
 * pa_context_set_sink_input_volume() or pa_context_set_source_output_volume().
 *
 * 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()
 *
 * It is strongly recommended that all volume changes are done as a direct
 * result of user input. With automated requests, such as those resulting
 * from misguided attempts of crossfading, PulseAudio can store the stream
 * volume at an inappropriate moment and restore it later. Besides, such
 * attempts lead to OSD popups in some desktop environments.
 *
 * As a special case of the general rule above, it is recommended that your
 * application leaves the task of saving and restoring the volume of its
 * streams to PulseAudio and does not attempt to do it by itself. PulseAudio
 * really knows better about events such as stream moving or headphone
 * plugging that would make the volume stored by the application inapplicable
 * to the new configuration.
 *
 * Another important case where setting a sink input volume may be a bad idea
 * is related to interpreters that interpret potentially untrusted scripts.
 * PulseAudio relies on your application not making malicious requests (such
 * as repeatedly setting the volume to 100%). Thus, script interpreters that
 * represent a security boundary must sandbox volume-changing requests coming
 * from their scripts. In the worst case, it may be necessary to apply the
 * script-requested volume to the script-produced sounds by altering the
 * samples in the script interpreter and not touching the sink or sink input
 * volume as seen by PulseAudio.
 *
 * If an application changes any volume, it should also listen to changes of
 * the same volume originating from outside the application (e.g., from the
 * system mixer application) and update its user interface accordingly. Use
 * \ref subscribe to get such notifications.
 *
 * \subsection module_subsec Modules
 *
 * Server modules can be remotely loaded and unloaded using
 * pa_context_load_module() and pa_context_unload_module().
 *
 * \subsection message_subsec Messages
 *
 * Server objects like sinks, sink inputs or modules can register a message
 * handler to communicate with clients. A message can be sent to a named
 * message handler using pa_context_send_message_to_object().
 *
 * \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.
 *
 * See also \subpage introspect
 */

/** @{ \name Sinks */

/** Stores information about a specific port of a sink.  Please
 * note that this structure can be extended as part of evolutionary
 * API updates at any time in any new release. \since 0.9.16 */
struct pa_sink_port_info
{
    const(char)* name; /**< Name of this port */
    const(char)* description; /**< Description of this port */
    uint priority; /**< The higher this value is, the more useful this port is as a default. */
    int available; /**< A flags (see #pa_port_available), indicating availability status of this port. \since 2.0 */
    const(char)* availability_group; /**< An indentifier for the group of ports that share their availability status with
     * each other. This is meant especially for handling cases where one 3.5 mm connector
     * is used for headphones, headsets and microphones, and the hardware can only tell
     * that something was plugged in but not what exactly. In this situation the ports for
     * all those devices share their availability status, and PulseAudio can't tell which
     * one is actually plugged in, and some application may ask the user what was plugged
     * in. Such applications should get a list of all card ports and compare their
     * `availability_group` fields. Ports that have the same group are those that need
     * input from the user to determine which device was plugged in. The application should
     * then activate the user-chosen port.
     *
     * May be NULL, in which case the port is not part of any availability group.
     *
     * The group identifier must be treated as an opaque identifier. The string may look
     * like an ALSA control name, but applications must not assume any such relationship.
     * The group naming scheme can change without a warning.
     *
     * Since one group can include both input and output ports, the grouping should be done
     * using pa_card_port_info instead of pa_sink_port_info, but this field is duplicated
     * also in pa_sink_port_info (and pa_source_port_info) in case someone finds that
     * convenient.
     *
     * \since 14.0 */
    uint type; /**< Port type, see #pa_device_port_type. \since 14.0 */
}

/** Stores information about sinks. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_sink_info
{
    const(char)* name; /**< Name of the sink */
    uint 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 */
    uint 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 */
    uint 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 queued audio in the output buffer. */
    const(char)* driver; /**< Driver name */
    pa_sink_flags_t flags; /**< Flags */
    pa_proplist* proplist; /**< Property list \since 0.9.11 */
    pa_usec_t configured_latency; /**< The latency this device has been configured to. \since 0.9.11 */
    pa_volume_t base_volume; /**< Some kind of "base" volume that refers to unamplified/unattenuated volume in the context of the output device. \since 0.9.15 */
    pa_sink_state_t state; /**< State \since 0.9.15 */
    uint n_volume_steps; /**< Number of volume steps for sinks which do not support arbitrary volumes. \since 0.9.15 */
    uint card; /**< Card index, or PA_INVALID_INDEX. \since 0.9.15 */
    uint n_ports; /**< Number of entries in port array \since 0.9.16 */
    pa_sink_port_info** ports; /**< Array of available ports, or NULL. Array is terminated by an entry set to NULL. The number of entries is stored in n_ports. \since 0.9.16 */
    pa_sink_port_info* active_port; /**< Pointer to active port in the array, or NULL. \since 0.9.16 */
    ubyte n_formats; /**< Number of formats supported by the sink. \since 1.0 */
    pa_format_info** formats; /**< Array of formats supported by the sink. \since 1.0 */
}

/** Callback prototype for pa_context_get_sink_info_by_name() and friends */
alias pa_sink_info_cb_t = void function (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, uint idx, 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);

/** Set the volume of a sink device specified by its index */
pa_operation* pa_context_set_sink_volume_by_index (pa_context* c, uint 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 */
pa_operation* pa_context_set_sink_mute_by_index (pa_context* c, uint idx, int mute, pa_context_success_cb_t cb, void* userdata);

/** Set the mute switch of a sink device specified by its name */
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);

/** Suspend/Resume a sink. \since 0.9.7 */
pa_operation* pa_context_suspend_sink_by_name (pa_context* c, const(char)* sink_name, int suspend, pa_context_success_cb_t cb, void* userdata);

/** Suspend/Resume a sink. If idx is PA_INVALID_INDEX all sinks will be suspended. \since 0.9.7 */
pa_operation* pa_context_suspend_sink_by_index (pa_context* c, uint idx, int suspend, pa_context_success_cb_t cb, void* userdata);

/** Change the profile of a sink. \since 0.9.16 */
pa_operation* pa_context_set_sink_port_by_index (pa_context* c, uint idx, const(char)* port, pa_context_success_cb_t cb, void* userdata);

/** Change the profile of a sink. \since 0.9.15 */
pa_operation* pa_context_set_sink_port_by_name (pa_context* c, const(char)* name, const(char)* port, pa_context_success_cb_t cb, void* userdata);

/** @} */

/** @{ \name Sources */

/** Stores information about a specific port of a source.  Please
 * note that this structure can be extended as part of evolutionary
 * API updates at any time in any new release. \since 0.9.16 */
struct pa_source_port_info
{
    const(char)* name; /**< Name of this port */
    const(char)* description; /**< Description of this port */
    uint priority; /**< The higher this value is, the more useful this port is as a default. */
    int available; /**< A flags (see #pa_port_available), indicating availability status of this port. \since 2.0 */
    const(char)* availability_group; /**< An indentifier for the group of ports that share their availability status with
     * each other. This is meant especially for handling cases where one 3.5 mm connector
     * is used for headphones, headsets and microphones, and the hardware can only tell
     * that something was plugged in but not what exactly. In this situation the ports for
     * all those devices share their availability status, and PulseAudio can't tell which
     * one is actually plugged in, and some application may ask the user what was plugged
     * in. Such applications should get a list of all card ports and compare their
     * `availability_group` fields. Ports that have the same group are those that need
     * input from the user to determine which device was plugged in. The application should
     * then activate the user-chosen port.
     *
     * May be NULL, in which case the port is not part of any availability group (which is
     * the same as having a group with only one member).
     *
     * The group identifier must be treated as an opaque identifier. The string may look
     * like an ALSA control name, but applications must not assume any such relationship.
     * The group naming scheme can change without a warning.
     *
     * Since one group can include both input and output ports, the grouping should be done
     * using pa_card_port_info instead of pa_source_port_info, but this field is duplicated
     * also in pa_source_port_info (and pa_sink_port_info) in case someone finds that
     * convenient.
     *
     * \since 14.0 */
    uint type; /**< Port type, see #pa_device_port_type. \since 14.0 */
}

/** Stores information about sources. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_source_info
{
    const(char)* name; /**< Name of the source */
    uint 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 */
    uint owner_module; /**< Owning module index, or PA_INVALID_INDEX. */
    pa_cvolume volume; /**< Volume of the source */
    int mute; /**< Mute switch of the sink */
    uint 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 NULL. */
    pa_usec_t latency; /**< Length of filled record buffer of this source. */
    const(char)* driver; /**< Driver name */
    pa_source_flags_t flags; /**< Flags */
    pa_proplist* proplist; /**< Property list \since 0.9.11 */
    pa_usec_t configured_latency; /**< The latency this device has been configured to. \since 0.9.11 */
    pa_volume_t base_volume; /**< Some kind of "base" volume that refers to unamplified/unattenuated volume in the context of the input device. \since 0.9.15 */
    pa_source_state_t state; /**< State \since 0.9.15 */
    uint n_volume_steps; /**< Number of volume steps for sources which do not support arbitrary volumes. \since 0.9.15 */
    uint card; /**< Card index, or PA_INVALID_INDEX. \since 0.9.15 */
    uint n_ports; /**< Number of entries in port array \since 0.9.16 */
    pa_source_port_info** ports; /**< Array of available ports, or NULL. Array is terminated by an entry set to NULL. The number of entries is stored in n_ports. \since 0.9.16  */
    pa_source_port_info* active_port; /**< Pointer to active port in the array, or NULL. \since 0.9.16  */
    ubyte n_formats; /**< Number of formats supported by the source. \since 1.0 */
    pa_format_info** formats; /**< Array of formats supported by the source. \since 1.0 */
}

/** Callback prototype for pa_context_get_source_info_by_name() and friends */
alias pa_source_info_cb_t = void function (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, uint idx, 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);

/** Set the volume of a source device specified by its index */
pa_operation* pa_context_set_source_volume_by_index (pa_context* c, uint idx, const(pa_cvolume)* volume, pa_context_success_cb_t cb, void* userdata);

/** Set the volume of a source device specified by its name */
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 */
pa_operation* pa_context_set_source_mute_by_index (pa_context* c, uint idx, int mute, pa_context_success_cb_t cb, void* userdata);

/** Set the mute switch of a source device specified by its name */
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);

/** Suspend/Resume a source. \since 0.9.7 */
pa_operation* pa_context_suspend_source_by_name (pa_context* c, const(char)* source_name, int suspend, pa_context_success_cb_t cb, void* userdata);

/** Suspend/Resume a source. If idx is PA_INVALID_INDEX, all sources will be suspended. \since 0.9.7 */
pa_operation* pa_context_suspend_source_by_index (pa_context* c, uint idx, int suspend, pa_context_success_cb_t cb, void* userdata);

/** Change the profile of a source. \since 0.9.16 */
pa_operation* pa_context_set_source_port_by_index (pa_context* c, uint idx, const(char)* port, pa_context_success_cb_t cb, void* userdata);

/** Change the profile of a source. \since 0.9.15 */
pa_operation* pa_context_set_source_port_by_name (pa_context* c, const(char)* name, const(char)* port, pa_context_success_cb_t cb, void* userdata);

/** @} */

/** @{ \name Server */

/** Server information. Please note that this structure can be
 * extended as part of evolutionary API updates at any time in any new
 * release. */
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. */
    const(char)* default_source_name; /**< Name of default source. */
    uint cookie; /**< A random cookie for identifying this instance of PulseAudio. */
    pa_channel_map channel_map; /**< Default channel map. \since 0.9.15 */
}

/** Callback prototype for pa_context_get_server_info() */
alias pa_server_info_cb_t = void function (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);

/** @} */

/** @{ \name Modules */

/** Stores information about modules. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_module_info
{
    uint index; /**< Index of the module */
    const(char)* name; /**< Name of the module */
    const(char)* argument; /**< Argument string of the module */
    uint n_used; /**< Usage counter or PA_INVALID_INDEX */
    /** \cond fulldocs */
    int auto_unload; /**< \deprecated Non-zero if this is an autoloaded module. */
    /** \endcond */
    pa_proplist* proplist; /**< Property list \since 0.9.15 */
}

/** Callback prototype for pa_context_get_module_info() and friends */
alias pa_module_info_cb_t = void function (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, uint 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);

/** Callback prototype for pa_context_load_module() */
alias pa_context_index_cb_t = void function (pa_context* c, uint idx, void* userdata);

/** Load a module. */
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. */
pa_operation* pa_context_unload_module (pa_context* c, uint idx, pa_context_success_cb_t cb, void* userdata);

/** @} */

/** @{ \name Messages */

/** Callback prototype for pa_context_send_message_to_object() \since 15.0 */
alias pa_context_string_cb_t = void function (pa_context* c, int success, char* response, void* userdata);

/** Send a message to an object that registered a message handler. For more information
 * see https://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/doc/messaging_api.txt. \since 15.0 */
pa_operation* pa_context_send_message_to_object (pa_context* c, const(char)* recipient_name, const(char)* message, const(char)* message_parameters, pa_context_string_cb_t cb, void* userdata);

/** @} */

/** @{ \name Clients */

/** Stores information about clients. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_client_info
{
    uint index; /**< Index of this client */
    const(char)* name; /**< Name of this client */
    uint owner_module; /**< Index of the owning module, or PA_INVALID_INDEX. */
    const(char)* driver; /**< Driver name */
    pa_proplist* proplist; /**< Property list \since 0.9.11 */
}

/** Callback prototype for pa_context_get_client_info() and friends */
alias pa_client_info_cb_t = void function (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, uint 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);

/** Kill a client. */
pa_operation* pa_context_kill_client (pa_context* c, uint idx, pa_context_success_cb_t cb, void* userdata);

/** @} */

/** @{ \name Cards */

/** \deprecated Superseded by pa_card_profile_info2 \since 0.9.15 */
struct pa_card_profile_info
{
    const(char)* name; /**< Name of this profile */
    const(char)* description; /**< Description of this profile */
    uint n_sinks; /**< Number of sinks this profile would create */
    uint n_sources; /**< Number of sources this profile would create */
    uint priority; /**< The higher this value is, the more useful this profile is as a default. */
}

/** Stores information about a specific profile of a card. Please
 * note that this structure can be extended as part of evolutionary
 * API updates at any time in any new release. \since 5.0 */
struct pa_card_profile_info2
{
    const(char)* name; /**< Name of this profile */
    const(char)* description; /**< Description of this profile */
    uint n_sinks; /**< Number of sinks this profile would create */
    uint n_sources; /**< Number of sources this profile would create */
    uint priority; /**< The higher this value is, the more useful this profile is as a default. */
    int available;
    /**< Is this profile available? If this is zero, meaning "unavailable",
     * then it makes no sense to try to activate this profile. If this is
     * non-zero, it's still not a guarantee that activating the profile will
     * result in anything useful, it just means that the server isn't aware of
     * any reason why the profile would definitely be useless. \since 5.0 */
}

/** Stores information about a specific port of a card.  Please
 * note that this structure can be extended as part of evolutionary
 * API updates at any time in any new release. \since 2.0 */
struct pa_card_port_info
{
    const(char)* name; /**< Name of this port */
    const(char)* description; /**< Description of this port */
    uint priority; /**< The higher this value is, the more useful this port is as a default. */
    int available; /**< A #pa_port_available enum, indicating availability status of this port. */
    int direction; /**< A #pa_direction enum, indicating the direction of this port. */
    uint n_profiles; /**< Number of entries in profile array */
    pa_card_profile_info** profiles; /**< \deprecated Superseded by profiles2 */
    pa_proplist* proplist; /**< Property list */
    long latency_offset; /**< Latency offset of the port that gets added to the sink/source latency when the port is active. \since 3.0 */
    pa_card_profile_info2** profiles2; /**< Array of pointers to available profiles, or NULL. Array is terminated by an entry set to NULL. \since 5.0 */
    const(char)* availability_group; /**< An indentifier for the group of ports that share their availability status with
     * each other. This is meant especially for handling cases where one 3.5 mm connector
     * is used for headphones, headsets and microphones, and the hardware can only tell
     * that something was plugged in but not what exactly. In this situation the ports for
     * all those devices share their availability status, and PulseAudio can't tell which
     * one is actually plugged in, and some application may ask the user what was plugged
     * in. Such applications should get a list of all card ports and compare their
     * `availability_group` fields. Ports that have the same group are those that need
     * input from the user to determine which device was plugged in. The application should
     * then activate the user-chosen port.
     *
     * May be NULL, in which case the port is not part of any availability group (which is
     * the same as having a group with only one member).
     *
     * The group identifier must be treated as an opaque identifier. The string may look
     * like an ALSA control name, but applications must not assume any such relationship.
     * The group naming scheme can change without a warning.
     *
     * \since 14.0 */
    uint type; /**< Port type, see #pa_device_port_type. \since 14.0 */
}

/** Stores information about cards. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release.  \since 0.9.15 */
struct pa_card_info
{
    uint index; /**< Index of this card */
    const(char)* name; /**< Name of this card */
    uint owner_module; /**< Index of the owning module, or PA_INVALID_INDEX. */
    const(char)* driver; /**< Driver name */
    uint n_profiles; /**< Number of entries in profile array */
    pa_card_profile_info* profiles; /**< \deprecated Superseded by profiles2 */
    pa_card_profile_info* active_profile; /**< \deprecated Superseded by active_profile2 */
    pa_proplist* proplist; /**< Property list */
    uint n_ports; /**< Number of entries in port array */
    pa_card_port_info** ports; /**< Array of pointers to ports, or NULL. Array is terminated by an entry set to NULL. */
    pa_card_profile_info2** profiles2; /**< Array of pointers to available profiles, or NULL. Array is terminated by an entry set to NULL. \since 5.0 */
    pa_card_profile_info2* active_profile2; /**< Pointer to active profile in the array, or NULL. \since 5.0 */
}

/** Callback prototype for pa_context_get_card_info_...() \since 0.9.15 */
alias pa_card_info_cb_t = void function (pa_context* c, const(pa_card_info)* i, int eol, void* userdata);

/** Get information about a card by its index \since 0.9.15 */
pa_operation* pa_context_get_card_info_by_index (pa_context* c, uint idx, pa_card_info_cb_t cb, void* userdata);

/** Get information about a card by its name \since 0.9.15 */
pa_operation* pa_context_get_card_info_by_name (pa_context* c, const(char)* name, pa_card_info_cb_t cb, void* userdata);

/** Get the complete card list \since 0.9.15 */
pa_operation* pa_context_get_card_info_list (pa_context* c, pa_card_info_cb_t cb, void* userdata);

/** Change the profile of a card. \since 0.9.15 */
pa_operation* pa_context_set_card_profile_by_index (pa_context* c, uint idx, const(char)* profile, pa_context_success_cb_t cb, void* userdata);

/** Change the profile of a card. \since 0.9.15 */
pa_operation* pa_context_set_card_profile_by_name (pa_context* c, const(char)* name, const(char)* profile, pa_context_success_cb_t cb, void* userdata);

/** Set the latency offset of a port. \since 3.0 */
pa_operation* pa_context_set_port_latency_offset (pa_context* c, const(char)* card_name, const(char)* port_name, long offset, pa_context_success_cb_t cb, void* userdata);

/** @} */

/** @{ \name Sink Inputs */

/** Stores information about sink inputs. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_sink_input_info
{
    uint index; /**< Index of the sink input */
    const(char)* name; /**< Name of the sink input */
    uint owner_module; /**< Index of the module this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any module. */
    uint client; /**< Index of the client this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any client. */
    uint 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_timing_info for details. */
    pa_usec_t sink_usec; /**< Latency of the sink device, see pa_timing_info for details. */
    const(char)* resample_method; /**< The resampling method used by this sink input. */
    const(char)* driver; /**< Driver name */
    int mute; /**< Stream muted \since 0.9.7 */
    pa_proplist* proplist; /**< Property list \since 0.9.11 */
    int corked; /**< Stream corked \since 1.0 */
    int has_volume; /**< Stream has volume. If not set, then the meaning of this struct's volume member is unspecified. \since 1.0 */
    int volume_writable; /**< The volume can be set. If not set, the volume can still change even though clients can't control the volume. \since 1.0 */
    pa_format_info* format; /**< Stream format information. \since 1.0 */
}

/** Callback prototype for pa_context_get_sink_input_info() and friends */
alias pa_sink_input_info_cb_t = void function (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, uint 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);

/** Move the specified sink input to a different sink. \since 0.9.5 */
pa_operation* pa_context_move_sink_input_by_name (pa_context* c, uint idx, const(char)* sink_name, pa_context_success_cb_t cb, void* userdata);

/** Move the specified sink input to a different sink. \since 0.9.5 */
pa_operation* pa_context_move_sink_input_by_index (pa_context* c, uint idx, uint sink_idx, 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, uint idx, const(pa_cvolume)* volume, pa_context_success_cb_t cb, void* userdata);

/** Set the mute switch of a sink input stream \since 0.9.7 */
pa_operation* pa_context_set_sink_input_mute (pa_context* c, uint idx, int mute, pa_context_success_cb_t cb, void* userdata);

/** Kill a sink input. */
pa_operation* pa_context_kill_sink_input (pa_context* c, uint idx, pa_context_success_cb_t cb, void* userdata);

/** @} */

/** @{ \name Source Outputs */

/** Stores information about source outputs. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_source_output_info
{
    uint index; /**< Index of the source output */
    const(char)* name; /**< Name of the source output */
    uint owner_module; /**< Index of the module this source output belongs to, or PA_INVALID_INDEX when it does not belong to any module. */
    uint client; /**< Index of the client this source output belongs to, or PA_INVALID_INDEX when it does not belong to any client. */
    uint 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_timing_info for details. */
    pa_usec_t source_usec; /**< Latency of the source device, see pa_timing_info for details. */
    const(char)* resample_method; /**< The resampling method used by this source output. */
    const(char)* driver; /**< Driver name */
    pa_proplist* proplist; /**< Property list \since 0.9.11 */
    int corked; /**< Stream corked \since 1.0 */
    pa_cvolume volume; /**< The volume of this source output \since 1.0 */
    int mute; /**< Stream muted \since 1.0 */
    int has_volume; /**< Stream has volume. If not set, then the meaning of this struct's volume member is unspecified. \since 1.0 */
    int volume_writable; /**< The volume can be set. If not set, the volume can still change even though clients can't control the volume. \since 1.0 */
    pa_format_info* format; /**< Stream format information. \since 1.0 */
}

/** Callback prototype for pa_context_get_source_output_info() and friends */
alias pa_source_output_info_cb_t = void function (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, uint 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);

/** Move the specified source output to a different source. \since 0.9.5 */
pa_operation* pa_context_move_source_output_by_name (pa_context* c, uint idx, const(char)* source_name, pa_context_success_cb_t cb, void* userdata);

/** Move the specified source output to a different source. \since 0.9.5 */
pa_operation* pa_context_move_source_output_by_index (pa_context* c, uint idx, uint source_idx, pa_context_success_cb_t cb, void* userdata);

/** Set the volume of a source output stream \since 1.0 */
pa_operation* pa_context_set_source_output_volume (pa_context* c, uint idx, const(pa_cvolume)* volume, pa_context_success_cb_t cb, void* userdata);

/** Set the mute switch of a source output stream \since 1.0 */
pa_operation* pa_context_set_source_output_mute (pa_context* c, uint idx, int mute, pa_context_success_cb_t cb, void* userdata);

/** Kill a source output. */
pa_operation* pa_context_kill_source_output (pa_context* c, uint idx, pa_context_success_cb_t cb, void* userdata);

/** @} */

/** @{ \name Statistics */

/** Memory block statistics. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_stat_info
{
    uint memblock_total; /**< Currently allocated memory blocks */
    uint memblock_total_size; /**< Current total size of allocated memory blocks */
    uint memblock_allocated; /**< Allocated memory blocks during the whole lifetime of the daemon. */
    uint memblock_allocated_size; /**< Total size of all memory blocks allocated during the whole lifetime of the daemon. */
    uint scache_size; /**< Total size of all sample cache entries. */
}

/** Callback prototype for pa_context_stat() */
alias pa_stat_info_cb_t = void function (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);

/** @} */

/** @{ \name Cached Samples */

/** Stores information about sample cache entries. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_sample_info
{
    uint 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 */
    uint bytes; /**< Length of this sample in bytes. */
    int lazy_; /**< Non-zero when this is a lazy cache entry. */
    const(char)* filename; /**< In case this is a lazy cache entry, the filename for the sound file to be loaded on demand. */
    pa_proplist* proplist; /**< Property list for this sample. \since 0.9.11 */
}

/** Callback prototype for pa_context_get_sample_info_by_name() and friends */
alias pa_sample_info_cb_t = void function (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, uint 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);

/** @} */

/** \cond fulldocs */

/** @{ \name Autoload Entries */

/** \deprecated Type of an autoload entry. */
enum pa_autoload_type
{
    PA_AUTOLOAD_SINK = 0,
    PA_AUTOLOAD_SOURCE = 1
}

alias pa_autoload_type_t = pa_autoload_type;

/** \deprecated Stores information about autoload entries. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
struct pa_autoload_info
{
    uint 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 */
}

/** \deprecated Callback prototype for pa_context_get_autoload_info_by_name() and friends */
alias pa_autoload_info_cb_t = void function (pa_context* c, const(pa_autoload_info)* i, int eol, void* userdata);

/** \deprecated Get info about a specific autoload entry. */
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);

/** \deprecated Get info about a specific autoload entry. */
pa_operation* pa_context_get_autoload_info_by_index (pa_context* c, uint idx, pa_autoload_info_cb_t cb, void* userdata);

/** \deprecated Get the complete list of autoload entries. */
pa_operation* pa_context_get_autoload_info_list (pa_context* c, pa_autoload_info_cb_t cb, void* userdata);

/** \deprecated Add a new autoload entry. */
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);

/** \deprecated Remove an autoload entry. */
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);

/** \deprecated Remove an autoload entry. */
pa_operation* pa_context_remove_autoload_by_index (pa_context* c, uint idx, pa_context_success_cb_t cb, void* userdata);

/** @} */

/** \endcond */