--- /dev/null
+/*
+ * 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"
+
+/* This is used for debugging format / conversion issues. If EFCD_ROTATE_FRAME is
+ * set to 0, the frame content will be always the "checkerboard". Otherwise, if
+ * EFCD_ROTATE_FRAME is set to a non-zero value, the frame content will "rotate"
+ * from a "checkerboard" frame to a "white/red/green/blue stripes" frame, to a
+ * "white/red/green/blue" frame. Frame content rotation helps finding bugs in
+ * format conversions.
+ */
+#define EFCD_ROTATE_FRAME 0
+
+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();
+
+ /* Starts the camera device. */
+ status_t startDevice(int width, int height, uint32_t pix_fmt);
+
+ /* Stops the camera device. */
+ status_t stopDevice();
+
+ /* Gets current preview fame into provided buffer. */
+ status_t getPreviewFrame(void* buffer);
+
+ /***************************************************************************
+ * 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 the 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);
+
+#if EFCD_ROTATE_FRAME
+ void drawSolid(YUVPixel* color);
+ void drawStripes();
+ int rotateFrame();
+#endif // EFCD_ROTATE_FRAME
+
+ /****************************************************************************
+ * 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;
+
+ /* Last time the frame has been redrawn. */
+ nsecs_t mLastRedrawn;
+
+ /*
+ * Precalculated values related to U/V panes.
+ */
+
+ /* U pane inside the framebuffer. */
+ uint8_t* mFrameU;
+
+ /* V pane inside the framebuffer. */
+ uint8_t* mFrameV;
+
+ /* Defines byte distance between adjacent U, and V values. */
+ int mUVStep;
+
+ /* Defines number of Us and Vs in a row inside the U/V panes.
+ * Note that if U/V panes are interleaved, this value reflects the total
+ * number of both, Us and Vs in a single row in the interleaved UV pane. */
+ int mUVInRow;
+
+ /* Total number of each, U, and V elements in the framebuffer. */
+ int mUVTotalNum;
+
+ /*
+ * Checkerboard drawing related stuff
+ */
+
+ int mCheckX;
+ int mCheckY;
+ int mCcounter;
+
+ /* 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;
+
+#if EFCD_ROTATE_FRAME
+ /* Frame rotation frequency in nanosec (currently - 3 sec) */
+ static const nsecs_t mRotateFreq = 3000000000LL;
+
+ /* Last time the frame has rotated. */
+ nsecs_t mLastRotatedAt;
+
+ /* Type of the frame to display in the current rotation:
+ * 0 - Checkerboard.
+ * 1 - White/Red/Green/Blue horisontal stripes
+ * 2 - Solid color. */
+ int mCurrentFrameType;
+
+ /* Color to use to paint the solid color frame. Colors will rotate between
+ * white, red, gree, and blue each time rotation comes to the solid color
+ * frame. */
+ YUVPixel* mCurrentColor;
+#endif // EFCD_ROTATE_FRAME
+};
+
+}; /* namespace android */
+
+#endif /* HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H */
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