libgui: Plumb detachBuffer through ConsumerBase

Exposes IGraphicBufferConsumer::detachBuffer as a ConsumerBase
method. attachBuffer is not currently exposed, because all current
clients will be recycling buffers through the allocator.

Bug: 19628705
Change-Id: I3e519767fa43d5d880c1d5695e31b60f6ad588af

1 files changed, 15 insertions, 0 deletions

diff --git a/libs/gui/ConsumerBase.cpp b/libs/gui/ConsumerBase.cpp
index b874e3a..e576018 100644
--- a/libs/gui/ConsumerBase.cpp
+++ b/libs/gui/ConsumerBase.cpp
@@ -163,6 +163,21 @@ void ConsumerBase::setFrameAvailableListener(
     mFrameAvailableListener = listener;
 }
 
+status_t ConsumerBase::detachBuffer(int slot) {
+    CB_LOGV("detachBuffer");
+    Mutex::Autolock lock(mMutex);
+
+    status_t result = mConsumer->detachBuffer(slot);
+    if (result != NO_ERROR) {
+        CB_LOGE("Failed to detach buffer: %d", result);
+        return result;
+    }
+
+    freeBufferLocked(slot);
+
+    return result;
+}
+
 void ConsumerBase::dump(String8& result) const {
     dump(result, "");
 }