BufferQueue improvements and APIs changes
this is the first step of a series of improvements to
BufferQueue. A few things happen in this change:
- setSynchronousMode() goes away as well as the SynchronousModeAllowed flag
- BufferQueue now defaults to (what used to be) synchronous mode
- a new "controlled by app" flag is passed when creating consumers and producers
those flags are used to put the BufferQueue in a mode where it
will never block if both flags are set. This is achieved by:
- returning an error from dequeueBuffer() if it would block
- making sure a buffer is always available by replacing
the previous buffer with the new one in queueBuffer()
(note: this is similar to what asynchrnous mode used to be)
Note: in this change EGL's swap-interval 0 is broken; this will be
fixed in another change.
Change-Id: I691f9507d6e2e158287e3039f2a79a4d4434211d
diff --git a/include/gui/ConsumerBase.h b/include/gui/ConsumerBase.h
index 42b84cc..7b58bc5 100644
--- a/include/gui/ConsumerBase.h
+++ b/include/gui/ConsumerBase.h
@@ -87,7 +87,9 @@
// ConsumerBase constructs a new ConsumerBase object to consume image
// buffers from the given BufferQueue.
- ConsumerBase(const sp<BufferQueue> &bufferQueue);
+ // The controlledByApp flag indicates that this consumer is under the application's
+ // control.
+ ConsumerBase(const sp<BufferQueue> &bufferQueue, bool controlledByApp = false);
// onLastStrongRef gets called by RefBase just before the dtor of the most
// derived class. It is used to clean up the buffers so that ConsumerBase