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media-session: rework device reservation

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Monitor the device reservation objects and mark the device available.
Don't select nodes from devices that are not available.
Acquire the device reservation when a device starts.
Release the device reservation when we suspend the device again.
This commit is contained in:
Wim Taymans 2020-02-19 18:15:57 +01:00
parent 11086f23ea
commit d3634aca7e
6 changed files with 188 additions and 59 deletions
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8
src/examples/media-session/reserve.h
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@ -35,10 +35,14 @@ extern "C" {
struct rd_device;
struct rd_device_callbacks {
/** the device is acquired */
/** the device is acquired by us */
void (*acquired) (void *data, struct rd_device *d);
/** request a release of the device */
void (*release) (void *data, struct rd_device *d, int forced);
/** the device is busy by someone else */
void (*busy) (void *data, struct rd_device *d, const char *name, int32_t priority);
/** the device is made available by someone else */
void (*available) (void *data, struct rd_device *d, const char *name);
};
/* create a new device and start watching */
@ -53,7 +57,7 @@ rd_device_new(DBusConnection *connection, /**< Bus to watch */
void *data);
/** try to acquire the device */
int rd_device_request_acquire(struct rd_device *d);
int rd_device_acquire(struct rd_device *d);
/** request the owner to release the device */
int rd_device_request_release(struct rd_device *d);