Refactored emulated camera HAL to comply with code style

Change-Id: If57b536ae6b1f9bad4213630488591a3b3cc9fdd
2011-09-13 14:35:25 -07:00
parent 492332c295
commit 5467be2eef
25 changed files with 1091 additions and 1088 deletions
--- a/tools/emulator/system/camera/EmulatedFakeCameraDevice.h
+++ b/tools/emulator/system/camera/EmulatedFakeCameraDevice.h
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2011 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 HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H
+#define HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H
+
+/*
+ * Contains declaration of a class EmulatedFakeCameraDevice that encapsulates
+ * a fake camera device.
+ */
+
+#include "Converters.h"
+#include "EmulatedCameraDevice.h"
+
+namespace android {
+
+class EmulatedFakeCamera;
+
+/* Encapsulates a fake camera device.
+ * Fake camera device emulates a camera device by providing frames containing
+ * a black and white checker board, moving diagonally towards the 0,0 corner.
+ * There is also a green, or red square that bounces inside the frame, changing
+ * its color when bouncing off the 0,0 corner.
+ */
+class EmulatedFakeCameraDevice : public EmulatedCameraDevice {
+public:
+    /* Constructs EmulatedFakeCameraDevice instance. */
+    explicit EmulatedFakeCameraDevice(EmulatedFakeCamera* camera_hal);
+
+    /* Destructs EmulatedFakeCameraDevice instance. */
+    ~EmulatedFakeCameraDevice();
+
+    /***************************************************************************
+     * Emulated camera device abstract interface implementation.
+     * See declarations of these methods in EmulatedCameraDevice class for
+     * information on each of these methods.
+     **************************************************************************/
+
+public:
+    /* Connects to the camera device.
+     * Since there is no real device to connect to, this method does nothing,
+     * but changes the state.
+     */
+    status_t connectDevice();
+
+    /* Disconnects from the camera device.
+     * Since there is no real device to disconnect from, this method does
+     * nothing, but changes the state.
+     */
+    status_t disconnectDevice();
+
+protected:
+    /* Starts capturing frames from the camera device.
+     * Since there is no real device to control, this method simply starts the
+     * worker thread, and changes the state.
+     */
+    status_t startDevice();
+
+    /* Stops capturing frames from the camera device.
+     * Since there is no real device to control, this method simply stops the
+     * worker thread, and changes the state.
+     */
+    status_t stopDevice();
+
+    /***************************************************************************
+     * Worker thread management overrides.
+     * See declarations of these methods in EmulatedCameraDevice class for
+     * information on each of these methods.
+     **************************************************************************/
+
+protected:
+    /* Implementation of the worker thread routine.
+     * This method simply sleeps for a period of time defined by FPS property of
+     * the fake camera (simulating frame frequency), and then calls emulated
+     * camera's onNextFrameAvailable method.
+     */
+    bool inWorkerThread();
+
+    /****************************************************************************
+     * Fake camera device private API
+     ***************************************************************************/
+
+private:
+    /* Draws a black and white checker board in the current frame buffer. */
+    void drawCheckerboard();
+
+    /* Draws a square of the given color in the current frame buffer.
+     * Param:
+     *  x, y - Coordinates of the top left corner of the square in the buffer.
+     *  size - Size of the square's side.
+     *  color - Square's color.
+     */
+    void drawSquare(int x, int y, int size, const YUVPixel* color);
+
+    /****************************************************************************
+     * Fake camera device data members
+     ***************************************************************************/
+
+private:
+    /*
+     * Pixel colors in YUV format used when drawing the checker board.
+     */
+
+    YUVPixel    mBlackYUV;
+    YUVPixel    mWhiteYUV;
+    YUVPixel    mRedYUV;
+    YUVPixel    mGreenYUV;
+    YUVPixel    mBlueYUV;
+
+    /*
+     * Drawing related stuff
+     */
+
+    int         mCheckX;
+    int         mCheckY;
+    int         mCcounter;
+    int         mHalfWidth;
+
+    /* Emulated FPS (frames per second).
+     * We will emulate 50 FPS. */
+    static const int        mEmulatedFPS = 50;
+
+    /* Defines time (in nanoseconds) between redrawing the checker board.
+     * We will redraw the checker board every 15 milliseconds. */
+    static const nsecs_t    mRedrawAfter = 15000000LL;
+};
+
+}; /* namespace android */
+
+#endif  /* HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H */