Device interface.
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struct pw_device_info * | pw_device_info_update (struct pw_device_info *info, const struct pw_device_info *update) |
| Update and existing pw_device_info with update and reset.
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struct pw_device_info * | pw_device_info_merge (struct pw_device_info *info, const struct pw_device_info *update, bool reset) |
| Merge and existing pw_device_info with update.
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void | pw_device_info_free (struct pw_device_info *info) |
| Free a pw_device_info.
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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) |
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PW_API_DEVICE_IMPL int | pw_device_subscribe_params (struct pw_device *object, uint32_t *ids, uint32_t n_ids) |
| Subscribe to parameter changes.
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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) |
| Enumerate device parameters.
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PW_API_DEVICE_IMPL int | pw_device_set_param (struct pw_device *object, uint32_t id, uint32_t flags, const struct spa_pod *param) |
| Set a parameter on the device.
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Device interface.
◆ PW_TYPE_INTERFACE_Device
◆ PW_DEVICE_PERM_MASK
◆ PW_VERSION_DEVICE
#define PW_VERSION_DEVICE 3 |
◆ PW_API_DEVICE_IMPL
#define PW_API_DEVICE_IMPL static inline |
◆ PW_DEVICE_CHANGE_MASK_PROPS
#define PW_DEVICE_CHANGE_MASK_PROPS (1 << 0) |
◆ PW_DEVICE_CHANGE_MASK_PARAMS
#define PW_DEVICE_CHANGE_MASK_PARAMS (1 << 1) |
◆ PW_DEVICE_CHANGE_MASK_ALL
#define PW_DEVICE_CHANGE_MASK_ALL ((1 << 2)-1) |
◆ PW_DEVICE_EVENT_INFO
#define PW_DEVICE_EVENT_INFO 0 |
◆ PW_DEVICE_EVENT_PARAM
#define PW_DEVICE_EVENT_PARAM 1 |
◆ PW_DEVICE_EVENT_NUM
#define PW_DEVICE_EVENT_NUM 2 |
◆ PW_VERSION_DEVICE_EVENTS
#define PW_VERSION_DEVICE_EVENTS 0 |
◆ PW_DEVICE_METHOD_ADD_LISTENER
#define PW_DEVICE_METHOD_ADD_LISTENER 0 |
◆ PW_DEVICE_METHOD_SUBSCRIBE_PARAMS
#define PW_DEVICE_METHOD_SUBSCRIBE_PARAMS 1 |
◆ PW_DEVICE_METHOD_ENUM_PARAMS
#define PW_DEVICE_METHOD_ENUM_PARAMS 2 |
◆ PW_DEVICE_METHOD_SET_PARAM
#define PW_DEVICE_METHOD_SET_PARAM 3 |
◆ PW_DEVICE_METHOD_NUM
#define PW_DEVICE_METHOD_NUM 4 |
◆ PW_VERSION_DEVICE_METHODS
#define PW_VERSION_DEVICE_METHODS 0 |
◆ pw_device_info_update()
◆ pw_device_info_merge()
◆ pw_device_info_free()
◆ pw_device_add_listener()
◆ pw_device_subscribe_params()
Subscribe to parameter changes.
Automatically emit param events for the given ids when they are changed.
- Parameters
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ids | an array of param ids |
n_ids | the number of ids in ids |
This requires X permissions on the device.
- See also
- pw_device_methods.subscribe_params
◆ pw_device_enum_params()
Enumerate device parameters.
Start enumeration of device parameters. For each param, a param event will be emitted.
- Parameters
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seq | a sequence number to place in the reply |
id | the parameter id to enum or PW_ID_ANY for all |
start | the start index or 0 for the first param |
num | the maximum number of params to retrieve |
filter | a param filter or NULL |
This requires X permissions on the device.
- See also
- pw_device_methods.enum_params
◆ pw_device_set_param()
Set a parameter on the device.
- Parameters
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id | the parameter id to set |
flags | extra parameter flags |
param | the parameter to set |
This requires W and X permissions on the device.
- See also
- pw_device_methods.set_param