camera: Drop pending preview for enableZsl shots
If the device support ZSL, drop pending preview buffers to reduce
the chance the rendering preview frames newer than the still frame
during takePicture().
Test: CTS
Bug: 67497723
Change-Id: I5f253a402a6302d31777ad4ca2878ef0d0d1ae44
(cherry picked from commit c75eb9b126b2c6b7fc8f47d8ae4e4ac15f6a176e)
diff --git a/services/camera/libcameraservice/device3/Camera3DummyStream.h b/services/camera/libcameraservice/device3/Camera3DummyStream.h
index 3212031..684f4b0 100644
--- a/services/camera/libcameraservice/device3/Camera3DummyStream.h
+++ b/services/camera/libcameraservice/device3/Camera3DummyStream.h
@@ -57,6 +57,12 @@
virtual status_t detachBuffer(sp<GraphicBuffer>* buffer, int* fenceFd);
/**
+ * Drop buffers for stream of streamId if dropping is true. If dropping is false, do not
+ * drop buffers for stream of streamId.
+ */
+ virtual status_t dropBuffers(bool /*dropping*/) override;
+
+ /**
* Return if this output stream is for video encoding.
*/
bool isVideoStream() const;