CameraService: Implement SCALER_ROTATE_AND_CROP_AUTO, part 1
When an app sets SCALER_ROTATE_AND_CROP to AUTO, the camera service
needs to select the right ROTATE_AND_CROP mode given the application
UI state at the moment, received from the window manager.
In addition, some of the metadata in the active array coordinate
system needs to be converted to/from the cropped+rotated coordinate
system to ensure roundtripping UI information works as before.
Also ensure that the available rotate and crop metadata field is
always available, with a value of NONE if nothing else.
This commit adds support for doing the coordinate transforms and
overriding AUTO to a concrete value; it does not wire up a connection
to another system service to receive the correct override value, but
does add a command to set the override value for all current camera
clients.
Test: New CTS tests pass, unit tests for RotateAndCropMapper pass
Bug: 134631897
Change-Id: Icc45530e2cfbaf838a1e4d04e4fd2aef8122e8e1
diff --git a/services/camera/libcameraservice/device3/RotateAndCropMapper.h b/services/camera/libcameraservice/device3/RotateAndCropMapper.h
new file mode 100644
index 0000000..459e27f
--- /dev/null
+++ b/services/camera/libcameraservice/device3/RotateAndCropMapper.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SERVERS_ROTATEANDCROPMAPPER_H
+#define ANDROID_SERVERS_ROTATEANDCROPMAPPER_H
+
+#include <utils/Errors.h>
+#include <array>
+#include <mutex>
+
+#include "camera/CameraMetadata.h"
+#include "device3/CoordinateMapper.h"
+
+namespace android {
+
+namespace camera3 {
+
+/**
+ * Utilities to transform between unrotated and rotated-and-cropped coordinate systems
+ * for cameras that support SCALER_ROTATE_AND_CROP controls in AUTO mode.
+ */
+class RotateAndCropMapper : private CoordinateMapper {
+ public:
+ static bool isNeeded(const CameraMetadata* deviceInfo);
+
+ RotateAndCropMapper(const CameraMetadata* deviceInfo);
+
+ /**
+ * Adjust capture request assuming rotate and crop AUTO is enabled
+ */
+ status_t updateCaptureRequest(CameraMetadata *request);
+
+ /**
+ * Adjust capture result assuming rotate and crop AUTO is enabled
+ */
+ status_t updateCaptureResult(CameraMetadata *result);
+
+ private:
+ // Transform count's worth of x,y points passed in with 2x2 matrix + translate with transform
+ // origin (cx,cy)
+ void transformPoints(int32_t* pts, size_t count, float transformMat[4],
+ float xShift, float yShift, float cx, float cy);
+ // Take two corners of a rect as (x1,y1,x2,y2) and swap x and y components
+ // if needed so that x1 < x2, y1 < y2.
+ void swapRectToMinFirst(int32_t* rect);
+
+ int32_t mArrayWidth, mArrayHeight;
+ float mArrayAspect, mRotateAspect;
+}; // class RotateAndCroMapper
+
+} // namespace camera3
+
+} // namespace android
+
+#endif