blob: f66f076475da929ff1ff6128346946920a56ae94
| 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H |
| 18 | #define HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H |
| 19 | |
| 20 | /* |
| 21 | * Contains declaration of a class EmulatedFakeCameraDevice that encapsulates |
| 22 | * a fake camera device. |
| 23 | */ |
| 24 | |
| 25 | #include "Converters.h" |
| 26 | #include "EmulatedCameraDevice.h" |
| 27 | |
| 28 | /* This is used for debugging format / conversion issues. If EFCD_ROTATE_FRAME is |
| 29 | * set to 0, the frame content will be always the "checkerboard". Otherwise, if |
| 30 | * EFCD_ROTATE_FRAME is set to a non-zero value, the frame content will "rotate" |
| 31 | * from a "checkerboard" frame to a "white/red/green/blue stripes" frame, to a |
| 32 | * "white/red/green/blue" frame. Frame content rotation helps finding bugs in |
| 33 | * format conversions. |
| 34 | */ |
| 35 | #define EFCD_ROTATE_FRAME 0 |
| 36 | |
| 37 | namespace android { |
| 38 | |
| 39 | class EmulatedFakeCamera; |
| 40 | |
| 41 | /* Encapsulates a fake camera device. |
| 42 | * Fake camera device emulates a camera device by providing frames containing |
| 43 | * a black and white checker board, moving diagonally towards the 0,0 corner. |
| 44 | * There is also a green, or red square that bounces inside the frame, changing |
| 45 | * its color when bouncing off the 0,0 corner. |
| 46 | */ |
| 47 | class EmulatedFakeCameraDevice : public EmulatedCameraDevice { |
| 48 | public: |
| 49 | /* Constructs EmulatedFakeCameraDevice instance. */ |
| 50 | explicit EmulatedFakeCameraDevice(EmulatedFakeCamera* camera_hal); |
| 51 | |
| 52 | /* Destructs EmulatedFakeCameraDevice instance. */ |
| 53 | ~EmulatedFakeCameraDevice(); |
| 54 | |
| 55 | /*************************************************************************** |
| 56 | * Emulated camera device abstract interface implementation. |
| 57 | * See declarations of these methods in EmulatedCameraDevice class for |
| 58 | * information on each of these methods. |
| 59 | **************************************************************************/ |
| 60 | |
| 61 | public: |
| 62 | /* Connects to the camera device. |
| 63 | * Since there is no real device to connect to, this method does nothing, |
| 64 | * but changes the state. |
| 65 | */ |
| 66 | status_t connectDevice(); |
| 67 | |
| 68 | /* Disconnects from the camera device. |
| 69 | * Since there is no real device to disconnect from, this method does |
| 70 | * nothing, but changes the state. |
| 71 | */ |
| 72 | status_t disconnectDevice(); |
| 73 | |
| 74 | /* Starts the camera device. */ |
| 75 | status_t startDevice(int width, int height, uint32_t pix_fmt); |
| 76 | |
| 77 | /* Stops the camera device. */ |
| 78 | status_t stopDevice(); |
| 79 | |
| 80 | /* Gets current preview fame into provided buffer. */ |
| 81 | status_t getPreviewFrame(void* buffer); |
| 82 | |
| 83 | /*************************************************************************** |
| 84 | * Worker thread management overrides. |
| 85 | * See declarations of these methods in EmulatedCameraDevice class for |
| 86 | * information on each of these methods. |
| 87 | **************************************************************************/ |
| 88 | |
| 89 | protected: |
| 90 | /* Implementation of the worker thread routine. |
| 91 | * This method simply sleeps for a period of time defined by the FPS property |
| 92 | * of the fake camera (simulating frame frequency), and then calls emulated |
| 93 | * camera's onNextFrameAvailable method. |
| 94 | */ |
| 95 | bool inWorkerThread(); |
| 96 | |
| 97 | /**************************************************************************** |
| 98 | * Fake camera device private API |
| 99 | ***************************************************************************/ |
| 100 | |
| 101 | private: |
| 102 | |
| 103 | /* Draws a black and white checker board in the current frame buffer. */ |
| 104 | void drawCheckerboard(); |
| 105 | |
| 106 | /* Draws a square of the given color in the current frame buffer. |
| 107 | * Param: |
| 108 | * x, y - Coordinates of the top left corner of the square in the buffer. |
| 109 | * size - Size of the square's side. |
| 110 | * color - Square's color. |
| 111 | */ |
| 112 | void drawSquare(int x, int y, int size, const YUVPixel* color); |
| 113 | |
| 114 | #if EFCD_ROTATE_FRAME |
| 115 | void drawSolid(YUVPixel* color); |
| 116 | void drawStripes(); |
| 117 | int rotateFrame(); |
| 118 | #endif // EFCD_ROTATE_FRAME |
| 119 | |
| 120 | /**************************************************************************** |
| 121 | * Fake camera device data members |
| 122 | ***************************************************************************/ |
| 123 | |
| 124 | private: |
| 125 | /* |
| 126 | * Pixel colors in YUV format used when drawing the checker board. |
| 127 | */ |
| 128 | |
| 129 | YUVPixel mBlackYUV; |
| 130 | YUVPixel mWhiteYUV; |
| 131 | YUVPixel mRedYUV; |
| 132 | YUVPixel mGreenYUV; |
| 133 | YUVPixel mBlueYUV; |
| 134 | |
| 135 | /* Last time the frame has been redrawn. */ |
| 136 | nsecs_t mLastRedrawn; |
| 137 | |
| 138 | /* |
| 139 | * Precalculated values related to U/V panes. |
| 140 | */ |
| 141 | |
| 142 | /* U pane inside the framebuffer. */ |
| 143 | uint8_t* mFrameU; |
| 144 | |
| 145 | /* V pane inside the framebuffer. */ |
| 146 | uint8_t* mFrameV; |
| 147 | |
| 148 | /* Defines byte distance between adjacent U, and V values. */ |
| 149 | int mUVStep; |
| 150 | |
| 151 | /* Defines number of Us and Vs in a row inside the U/V panes. |
| 152 | * Note that if U/V panes are interleaved, this value reflects the total |
| 153 | * number of both, Us and Vs in a single row in the interleaved UV pane. */ |
| 154 | int mUVInRow; |
| 155 | |
| 156 | /* Total number of each, U, and V elements in the framebuffer. */ |
| 157 | int mUVTotalNum; |
| 158 | |
| 159 | /* |
| 160 | * Checkerboard drawing related stuff |
| 161 | */ |
| 162 | |
| 163 | int mCheckX; |
| 164 | int mCheckY; |
| 165 | int mCcounter; |
| 166 | |
| 167 | /* Emulated FPS (frames per second). |
| 168 | * We will emulate 50 FPS. */ |
| 169 | static const int mEmulatedFPS = 50; |
| 170 | |
| 171 | /* Defines time (in nanoseconds) between redrawing the checker board. |
| 172 | * We will redraw the checker board every 15 milliseconds. */ |
| 173 | static const nsecs_t mRedrawAfter = 15000000LL; |
| 174 | |
| 175 | #if EFCD_ROTATE_FRAME |
| 176 | /* Frame rotation frequency in nanosec (currently - 3 sec) */ |
| 177 | static const nsecs_t mRotateFreq = 3000000000LL; |
| 178 | |
| 179 | /* Last time the frame has rotated. */ |
| 180 | nsecs_t mLastRotatedAt; |
| 181 | |
| 182 | /* Type of the frame to display in the current rotation: |
| 183 | * 0 - Checkerboard. |
| 184 | * 1 - White/Red/Green/Blue horisontal stripes |
| 185 | * 2 - Solid color. */ |
| 186 | int mCurrentFrameType; |
| 187 | |
| 188 | /* Color to use to paint the solid color frame. Colors will rotate between |
| 189 | * white, red, gree, and blue each time rotation comes to the solid color |
| 190 | * frame. */ |
| 191 | YUVPixel* mCurrentColor; |
| 192 | #endif // EFCD_ROTATE_FRAME |
| 193 | }; |
| 194 | |
| 195 | }; /* namespace android */ |
| 196 | |
| 197 | #endif /* HW_EMULATOR_CAMERA_EMULATED_FAKE_CAMERA_DEVICE_H */ |
| 198 |