BufferQueueProducer: add detachNextBuffer

Adds a new method, IGBP::detachNextBuffer, that effectively does
dequeue + request + detach in a single call, but does not need to
know anything about the dequeued buffer, and will not block on
dequeue. This is mostly for the upcoming StreamSplitter to use in
its onBufferReleased callback.

Change-Id: Ie88a69de109003acebaa486a5b44c8a455726550

1 files changed, 5 insertions, 0 deletions

diff --git a/libs/gui/BufferQueue.cpp b/libs/gui/BufferQueue.cpp
index d04b67d630..da980a70e1 100644
--- a/libs/gui/BufferQueue.cpp
+++ b/libs/gui/BufferQueue.cpp
@@ -103,6 +103,11 @@ status_t BufferQueue::detachProducerBuffer(int slot) {
     return mProducer->detachBuffer(slot);
 }
 
+status_t BufferQueue::detachNextBuffer(sp<GraphicBuffer>* outBuffer,
+        sp<Fence>* outFence) {
+    return mProducer->detachNextBuffer(outBuffer, outFence);
+}
+
 status_t BufferQueue::attachProducerBuffer(int* slot,
         const sp<GraphicBuffer>& buffer) {
     return mProducer->attachBuffer(slot, buffer);