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/Camera3OutputStream.h b/services/camera/libcameraservice/device3/Camera3OutputStream.h
index fbb14fe..18b1901 100644
--- a/services/camera/libcameraservice/device3/Camera3OutputStream.h
+++ b/services/camera/libcameraservice/device3/Camera3OutputStream.h
@@ -166,6 +166,11 @@
virtual status_t notifyBufferReleased(ANativeWindowBuffer *anwBuffer);
/**
+ * Drop buffers if dropping is true. If dropping is false, do not drop buffers.
+ */
+ virtual status_t dropBuffers(bool dropping) override;
+
+ /**
* Set the graphic buffer manager to get/return the stream buffers.
*
* It is only legal to call this method when stream is in STATE_CONSTRUCTED state.
@@ -260,6 +265,9 @@
*/
uint64_t mConsumerUsage;
+ // Whether to drop valid buffers.
+ bool mDropBuffers;
+
/**
* Internal Camera3Stream interface
*/