/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
#ifndef PIPEWIRE_DEVICE_H
#define PIPEWIRE_DEVICE_H
#ifdef __cplusplus
extern "C" {
#endif
#include <spa/utils/defs.h>
#include <spa/utils/hook.h>
#include <pipewire/proxy.h>
/** \defgroup pw_device Device
* Device interface
*/
/**
* \ addtogroup pw_device
* \ {
*/
#define PW_TYPE_INTERFACE_Device PW_TYPE_INFO_INTERFACE_BASE "Device"
#define PW_DEVICE_PERM_MASK PW_PERM_RWXM
#define PW_VERSION_DEVICE 3
struct pw_device;
#ifndef PW_API_DEVICE_IMPL
#define PW_API_DEVICE_IMPL static inline
#endif
/** The device information. Extra information can be added in later versions */
struct pw_device_info {
uint32_t id; /**< id of the global */
#define PW_DEVICE_CHANGE_MASK_PROPS (1 << 0 )
#define PW_DEVICE_CHANGE_MASK_PARAMS (1 << 1 )
#define PW_DEVICE_CHANGE_MASK_ALL ((1 << 2 )-1 )
uint64_t change_mask; /**< bitfield of changed fields since last call */
struct spa_dict *props; /**< extra properties */
struct spa_param_info *params; /**< parameters */
uint32_t n_params; /**< number of items in \a params */
};
/** Update and existing \ref pw_device_info with \a update and reset */
struct pw_device_info *
pw_device_info_update(struct pw_device_info *info,
const struct pw_device_info *update);
/** Merge and existing \ref pw_device_info with \a update */
struct pw_device_info *
pw_device_info_merge(struct pw_device_info *info,
const struct pw_device_info *update, bool reset);
/** Free a \ref pw_device_info */
void pw_device_info_free(struct pw_device_info *info);
#define PW_DEVICE_EVENT_INFO 0
#define PW_DEVICE_EVENT_PARAM 1
#define PW_DEVICE_EVENT_NUM 2
/** Device events */
struct pw_device_events {
#define PW_VERSION_DEVICE_EVENTS 0
uint32_t version;
/**
* Notify device info
*
* \ param info info about the device
*/
void (*info) (void *data, const struct pw_device_info *info);
/**
* Notify a device param
*
* Event emitted as a result of the enum_params method .
*
* \ param seq the sequence number of the request
* \ param id the param id
* \ param index the param index
* \ param next the param index of the next param
* \ param param the parameter
*/
void (*param) (void *data, int seq,
uint32_t id, uint32_t index, uint32_t next,
const struct spa_pod *param);
};
#define PW_DEVICE_METHOD_ADD_LISTENER 0
#define PW_DEVICE_METHOD_SUBSCRIBE_PARAMS 1
#define PW_DEVICE_METHOD_ENUM_PARAMS 2
#define PW_DEVICE_METHOD_SET_PARAM 3
#define PW_DEVICE_METHOD_NUM 4
/** Device methods */
struct pw_device_methods {
#define PW_VERSION_DEVICE_METHODS 0
uint32_t version;
int (*add_listener) (void *object,
struct spa_hook *listener,
const struct pw_device_events *events,
void *data);
/**
* Subscribe to parameter changes
*
* Automatically emit param events for the given ids when
* they are changed .
*
* \ param ids an array of param ids
* \ param n_ids the number of ids in \ a ids
*
* This requires X permissions on the device .
*/
int (*subscribe_params) (void *object, uint32_t *ids, uint32_t n_ids);
/**
* Enumerate device parameters
*
* Start enumeration of device parameters . For each param , a
* param event will be emitted .
*
* \ param seq a sequence number to place in the reply
* \ param id the parameter id to enum or PW_ID_ANY for all
* \ param start the start index or 0 for the first param
* \ param num the maximum number of params to retrieve
* \ param filter a param filter or NULL
*
* This requires X permissions on the device .
*/
int (*enum_params) (void *object, int seq, uint32_t id, uint32_t start, uint32_t num,
const struct spa_pod *filter);
/**
* Set a parameter on the device
*
* \ param id the parameter id to set
* \ param flags extra parameter flags
* \ param param the parameter to set
*
* This requires W and X permissions on the device .
*/
int (*set_param) (void *object, uint32_t id, uint32_t flags,
const struct spa_pod *param);
};
/** \copydoc pw_device_methods.add_listener
* \sa pw_device_methods.add_listener */
PW_API_DEVICE_IMPL int pw_device_add_listener(struct pw_device *object,
struct spa_hook *listener,
const struct pw_device_events *events,
void *data)
{
return spa_api_method_r(int , -ENOTSUP,
pw_device, (struct spa_interface*)object, add_listener, 0 ,
listener, events, data);
}
/** \copydoc pw_device_methods.subscribe_params
* \sa pw_device_methods.subscribe_params */
PW_API_DEVICE_IMPL int pw_device_subscribe_params(struct pw_device *object, uint32_t *ids, uint32_t n_ids)
{
return spa_api_method_r(int , -ENOTSUP,
pw_device, (struct spa_interface*)object, subscribe_params, 0 ,
ids, n_ids);
}
/** \copydoc pw_device_methods.enum_params
* \sa pw_device_methods.enum_params */
PW_API_DEVICE_IMPL int pw_device_enum_params(struct pw_device *object,
int seq, uint32_t id, uint32_t start, uint32_t num,
const struct spa_pod *filter)
{
return spa_api_method_r(int , -ENOTSUP,
pw_device, (struct spa_interface*)object, enum_params, 0 ,
seq, id, start, num, filter);
}
/** \copydoc pw_device_methods.set_param
* \sa pw_device_methods.set_param */
PW_API_DEVICE_IMPL int pw_device_set_param(struct pw_device *object, uint32_t id, uint32_t flags,
const struct spa_pod *param)
{
return spa_api_method_r(int , -ENOTSUP,
pw_device, (struct spa_interface*)object, set_param, 0 ,
id, flags, param);
}
/**
* \ }
*/
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* PIPEWIRE_DEVICE_H */
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