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/BufferItemConsumer.h b/include/gui/BufferItemConsumer.h
index 0af6f8e..9370e81 100644
--- a/include/gui/BufferItemConsumer.h
+++ b/include/gui/BufferItemConsumer.h
@@ -51,9 +51,11 @@
// the consumer usage flags passed to the graphics allocator. The
// bufferCount parameter specifies how many buffers can be locked for user
// access at the same time.
+ // controlledByApp tells whether this consumer is controlled by the
+ // application.
BufferItemConsumer(const sp<BufferQueue>& bq, uint32_t consumerUsage,
int bufferCount = BufferQueue::MIN_UNDEQUEUED_BUFFERS,
- bool synchronousMode = false);
+ bool controlledByApp = false);
virtual ~BufferItemConsumer();