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/libs/gui/CpuConsumer.cpp b/libs/gui/CpuConsumer.cpp
index adddfc2..b8c00af 100644
--- a/libs/gui/CpuConsumer.cpp
+++ b/libs/gui/CpuConsumer.cpp
@@ -31,15 +31,14 @@
namespace android {
CpuConsumer::CpuConsumer(const sp<BufferQueue>& bq,
- uint32_t maxLockedBuffers, bool synchronousMode) :
- ConsumerBase(bq),
+ uint32_t maxLockedBuffers, bool controlledByApp) :
+ ConsumerBase(bq, controlledByApp),
mMaxLockedBuffers(maxLockedBuffers),
mCurrentLockedBuffers(0)
{
// Create tracking entries for locked buffers
mAcquiredBuffers.insertAt(0, maxLockedBuffers);
- mBufferQueue->setSynchronousMode(synchronousMode);
mBufferQueue->setConsumerUsageBits(GRALLOC_USAGE_SW_READ_OFTEN);
mBufferQueue->setMaxAcquiredBufferCount(maxLockedBuffers);
}