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With this change, a client (i.e., display driver) can register a wakeup signal handler to be notified on the arrival of new data to capture. The signal is delivered only when the client has stopped capturing. The client propagates this condition to the server using the new 'capture_stopped' RPC call. This change in principle enables a display driver to suspend its periodic mode of operation after a few frames without capturing any new data. As the first driver, the fb_sdl driver has been adapted to the new protocol. This change not only eliminates the driver's CPU load when idle, it also reduces the latency of sporadic output because the response to such GUI updates is no longer bound by a fixed periodic interval. Issue #5344 |
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capture_session.h | ||
connection.h |