Camera2: Add prepare for output streams
The prepare call asynchronously pre-allocates buffers for a given
output stream, and then fires the onPrepared callback.
Not implemented for Camera2Device or used in Camera2Client.
Change-Id: I1cccdfff846dd6985133c591dbdceed823929ade
diff --git a/services/camera/libcameraservice/device3/Camera3Device.h b/services/camera/libcameraservice/device3/Camera3Device.h
index b08ba81..4fbcb2e 100644
--- a/services/camera/libcameraservice/device3/Camera3Device.h
+++ b/services/camera/libcameraservice/device3/Camera3Device.h
@@ -138,6 +138,8 @@
virtual status_t flush(int64_t *lastFrameNumber = NULL);
+ virtual status_t prepare(int streamId);
+
virtual uint32_t getDeviceVersion();
virtual ssize_t getJpegBufferSize(uint32_t width, uint32_t height) const;
@@ -374,7 +376,7 @@
sp<camera3::StatusTracker> statusTracker,
camera3_device_t *hal3Device);
- void setNotifyCallback(NotificationListener *listener);
+ void setNotificationListener(NotificationListener *listener);
/**
* Call after stream (re)-configuration is completed.
@@ -438,6 +440,12 @@
*/
CameraMetadata getLatestRequest() const;
+ /**
+ * Returns true if the stream is a target of any queued or repeating
+ * capture request
+ */
+ bool isStreamPending(sp<camera3::Camera3StreamInterface>& stream);
+
protected:
virtual bool threadLoop();
@@ -559,7 +567,6 @@
Vector<camera3_stream_buffer_t> pendingOutputBuffers;
-
// Fields used by the partial result only
struct PartialResultInFlight {
// Set by process_capture_result once 3A has been sent to clients
@@ -610,7 +617,8 @@
resultExtras(extras),
hasInputBuffer(hasInput){
}
-};
+ };
+
// Map from frame number to the in-flight request state
typedef KeyedVector<uint32_t, InFlightRequest> InFlightMap;
@@ -642,6 +650,45 @@
sp<camera3::StatusTracker> mStatusTracker;
/**
+ * Thread for preparing streams
+ */
+ class PreparerThread : private Thread, public virtual RefBase {
+ public:
+ PreparerThread();
+ ~PreparerThread();
+
+ void setNotificationListener(NotificationListener *listener);
+
+ /**
+ * Queue up a stream to be prepared. Streams are processed by
+ * a background thread in FIFO order
+ */
+ status_t prepare(sp<camera3::Camera3StreamInterface>& stream);
+
+ /**
+ * Cancel all current and pending stream preparation
+ */
+ status_t clear();
+
+ private:
+ Mutex mLock;
+
+ virtual bool threadLoop();
+
+ // Guarded by mLock
+
+ NotificationListener *mListener;
+ List<sp<camera3::Camera3StreamInterface> > mPendingStreams;
+ bool mActive;
+ bool mCancelNow;
+
+ // Only accessed by threadLoop and the destructor
+
+ sp<camera3::Camera3StreamInterface> mCurrentStream;
+ };
+ sp<PreparerThread> mPreparerThread;
+
+ /**
* Output result queue and current HAL device 3A state
*/