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device: add sync operation

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This commit is contained in:
Wim Taymans 2019-05-28 13:55:36 +02:00
parent 7d1a833b82
commit c767ce62c9
1 changed files with 22 additions and 3 deletions
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25
spa/include/spa/monitor/device.h
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@ -115,9 +115,10 @@ struct spa_device_events {
};
#define SPA_DEVICE_METHOD_ADD_LISTENER 0
#define SPA_DEVICE_METHOD_ENUM_PARAMS 1
#define SPA_DEVICE_METHOD_SET_PARAM 2
#define SPA_DEVICE_METHOD_NUM 3
#define SPA_DEVICE_METHOD_SYNC 1
#define SPA_DEVICE_METHOD_ENUM_PARAMS 2
#define SPA_DEVICE_METHOD_SET_PARAM 3
#define SPA_DEVICE_METHOD_NUM 4
/**
* spa_device_methods:
@ -147,6 +148,23 @@ struct spa_device_methods {
struct spa_hook *listener,
const struct spa_device_events *events,
void *data);
/**
* Perform a sync operation.
*
* This method will emit the result event with the given sequence
* number synchronously or with the returned async return value
* asynchronously.
*
* Because all methods are serialized in the device, this can be used
* to wait for completion of all previous method calls.
*
* \param seq a sequence number
* \return 0 on success
* -EINVAL when node is NULL
* an async result
*/
int (*sync) (void *object, int seq);
/**
* Enumerate the parameters of a device.
*
@ -213,6 +231,7 @@ struct spa_device_methods {
})
#define spa_device_add_listener(d,...) spa_device_method(d, add_listener, 0, __VA_ARGS__)
#define spa_device_sync(d,...) spa_device_method(d, sync, 0, __VA_ARGS__)
#define spa_device_enum_params(d,...) spa_device_method(d, enum_params, 0, __VA_ARGS__)
#define spa_device_set_param(d,...) spa_device_method(d, set_param, 0, __VA_ARGS__)