Add sideband streams to BufferQueue and related classes
Sideband streams are essentially a device-specific buffer queue that
bypasses the BufferQueue system. They can be used for situations with
hard real-time requirements like high-quality TV and video playback
with A/V sync. A handle to the stream is provided by the source HAL,
and attached to a BufferQueue. The sink HAL can read buffers via the
stream handle rather than acquiring individual buffers from the
BufferQueue.
Change-Id: Ib3f262eddfc520f4bbe3d9b91753ed7dd09d3a9b
diff --git a/services/surfaceflinger/SurfaceFlingerConsumer.cpp b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
index 6dc093e..a412543 100644
--- a/services/surfaceflinger/SurfaceFlingerConsumer.cpp
+++ b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
@@ -21,8 +21,9 @@
#include <private/gui/SyncFeatures.h>
-#include <utils/Trace.h>
#include <utils/Errors.h>
+#include <utils/NativeHandle.h>
+#include <utils/Trace.h>
namespace android {
@@ -112,6 +113,10 @@
return mTransformToDisplayInverse;
}
+sp<NativeHandle> SurfaceFlingerConsumer::getSidebandStream() const {
+ return mConsumer->getSidebandStream();
+}
+
// We need to determine the time when a buffer acquired now will be
// displayed. This can be calculated:
// time when previous buffer's actual-present fence was signaled
@@ -154,6 +159,26 @@
return prevVsync + hwcLatency * vsyncPeriod + extraPadding;
}
+void SurfaceFlingerConsumer::setContentsChangedListener(
+ const wp<ContentsChangedListener>& listener) {
+ setFrameAvailableListener(listener);
+ Mutex::Autolock lock(mMutex);
+ mContentsChangedListener = listener;
+}
+
+void SurfaceFlingerConsumer::onSidebandStreamChanged() {
+ sp<ContentsChangedListener> listener;
+ { // scope for the lock
+ Mutex::Autolock lock(mMutex);
+ ALOG_ASSERT(mFrameAvailableListener.unsafe_get() == mContentsChangedListener.unsafe_get());
+ listener = mContentsChangedListener.promote();
+ }
+
+ if (listener != NULL) {
+ listener->onSidebandStreamChanged();
+ }
+}
+
// ---------------------------------------------------------------------------
}; // namespace android