Import goldfish HAL sources from devices/generic/goldfish
We import all code here so we can customize and keep in sync with what we do on the host side more easily.
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Simon Fels
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android/camera/EmulatedFakeCameraDevice.h
Executable file
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android/camera/EmulatedFakeCameraDevice.h
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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H
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#define HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H
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/*
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* Contains declaration of a class EmulatedFakeCameraDevice that encapsulates
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* a fake camera device.
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*/
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#include "Converters.h"
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#include "EmulatedCameraDevice.h"
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/* This is used for debugging format / conversion issues. If EFCD_ROTATE_FRAME is
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* set to 0, the frame content will be always the "checkerboard". Otherwise, if
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* EFCD_ROTATE_FRAME is set to a non-zero value, the frame content will "rotate"
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* from a "checkerboard" frame to a "white/red/green/blue stripes" frame, to a
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* "white/red/green/blue" frame. Frame content rotation helps finding bugs in
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* format conversions.
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*/
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#define EFCD_ROTATE_FRAME 0
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namespace android {
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class EmulatedFakeCamera;
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/* Encapsulates a fake camera device.
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* Fake camera device emulates a camera device by providing frames containing
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* a black and white checker board, moving diagonally towards the 0,0 corner.
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* There is also a green, or red square that bounces inside the frame, changing
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* its color when bouncing off the 0,0 corner.
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*/
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class EmulatedFakeCameraDevice : public EmulatedCameraDevice {
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public:
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/* Constructs EmulatedFakeCameraDevice instance. */
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explicit EmulatedFakeCameraDevice(EmulatedFakeCamera* camera_hal);
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/* Destructs EmulatedFakeCameraDevice instance. */
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~EmulatedFakeCameraDevice();
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/***************************************************************************
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* Emulated camera device abstract interface implementation.
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* See declarations of these methods in EmulatedCameraDevice class for
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* information on each of these methods.
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**************************************************************************/
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public:
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/* Connects to the camera device.
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* Since there is no real device to connect to, this method does nothing,
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* but changes the state.
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*/
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status_t connectDevice();
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/* Disconnects from the camera device.
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* Since there is no real device to disconnect from, this method does
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* nothing, but changes the state.
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*/
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status_t disconnectDevice();
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/* Starts the camera device. */
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status_t startDevice(int width, int height, uint32_t pix_fmt);
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/* Stops the camera device. */
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status_t stopDevice();
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/* Gets current preview fame into provided buffer. */
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status_t getPreviewFrame(void* buffer);
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/***************************************************************************
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* Worker thread management overrides.
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* See declarations of these methods in EmulatedCameraDevice class for
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* information on each of these methods.
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**************************************************************************/
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protected:
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/* Implementation of the worker thread routine.
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* This method simply sleeps for a period of time defined by the FPS property
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* of the fake camera (simulating frame frequency), and then calls emulated
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* camera's onNextFrameAvailable method.
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*/
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bool inWorkerThread();
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/****************************************************************************
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* Fake camera device private API
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***************************************************************************/
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private:
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/* Draws a black and white checker board in the current frame buffer. */
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void drawCheckerboard();
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/* Draws a square of the given color in the current frame buffer.
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* Param:
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* x, y - Coordinates of the top left corner of the square in the buffer.
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* size - Size of the square's side.
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* color - Square's color.
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*/
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void drawSquare(int x, int y, int size, const YUVPixel* color);
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#if EFCD_ROTATE_FRAME
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void drawSolid(YUVPixel* color);
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void drawStripes();
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int rotateFrame();
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#endif // EFCD_ROTATE_FRAME
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/****************************************************************************
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* Fake camera device data members
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***************************************************************************/
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private:
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/*
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* Pixel colors in YUV format used when drawing the checker board.
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*/
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YUVPixel mBlackYUV;
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YUVPixel mWhiteYUV;
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YUVPixel mRedYUV;
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YUVPixel mGreenYUV;
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YUVPixel mBlueYUV;
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/* Last time the frame has been redrawn. */
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nsecs_t mLastRedrawn;
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/*
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* Precalculated values related to U/V panes.
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*/
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/* U pane inside the framebuffer. */
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uint8_t* mFrameU;
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/* V pane inside the framebuffer. */
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uint8_t* mFrameV;
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/* Defines byte distance between adjacent U, and V values. */
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int mUVStep;
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/* Defines number of Us and Vs in a row inside the U/V panes.
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* Note that if U/V panes are interleaved, this value reflects the total
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* number of both, Us and Vs in a single row in the interleaved UV pane. */
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int mUVInRow;
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/* Total number of each, U, and V elements in the framebuffer. */
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int mUVTotalNum;
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/*
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* Checkerboard drawing related stuff
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*/
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int mCheckX;
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int mCheckY;
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int mCcounter;
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/* Emulated FPS (frames per second).
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* We will emulate 50 FPS. */
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static const int mEmulatedFPS = 50;
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/* Defines time (in nanoseconds) between redrawing the checker board.
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* We will redraw the checker board every 15 milliseconds. */
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static const nsecs_t mRedrawAfter = 15000000LL;
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#if EFCD_ROTATE_FRAME
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/* Frame rotation frequency in nanosec (currently - 3 sec) */
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static const nsecs_t mRotateFreq = 3000000000LL;
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/* Last time the frame has rotated. */
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nsecs_t mLastRotatedAt;
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/* Type of the frame to display in the current rotation:
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* 0 - Checkerboard.
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* 1 - White/Red/Green/Blue horisontal stripes
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* 2 - Solid color. */
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int mCurrentFrameType;
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/* Color to use to paint the solid color frame. Colors will rotate between
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* white, red, gree, and blue each time rotation comes to the solid color
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* frame. */
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YUVPixel* mCurrentColor;
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#endif // EFCD_ROTATE_FRAME
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};
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}; /* namespace android */
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#endif /* HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H */
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