--- /dev/null
+/*
+ * Copyright (C) 2012 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.
+ */
+
+/**
+ * The Scene class implements a simple physical simulation of a scene, using the
+ * CIE 1931 colorspace to represent light in physical units (lux).
+ *
+ * It's fairly approximate, but does provide a scene with realistic widely
+ * variable illumination levels and colors over time.
+ *
+ */
+
+#ifndef HW_EMULATOR_CAMERA2_SCENE_H
+#define HW_EMULATOR_CAMERA2_SCENE_H
+
+#include "utils/Timers.h"
+
+namespace android {
+
+class Scene {
+ public:
+ Scene(int sensorWidthPx,
+ int sensorHeightPx,
+ float sensorSensitivity);
+ ~Scene();
+
+ // Set the filter coefficients for the red, green, and blue filters on the
+ // sensor. Used as an optimization to pre-calculate various illuminance
+ // values. Two different green filters can be provided, to account for
+ // possible cross-talk on a Bayer sensor. Must be called before
+ // calculateScene.
+ void setColorFilterXYZ(
+ float rX, float rY, float rZ,
+ float grX, float grY, float grZ,
+ float gbX, float gbY, float gbZ,
+ float bX, float bY, float bZ);
+
+ // Set time of day (24-hour clock). This controls the general light levels
+ // in the scene. Must be called before calculateScene
+ void setHour(int hour);
+ // Get current hour
+ int getHour();
+
+ // Set the duration of exposure for determining luminous exposure.
+ // Must be called before calculateScene
+ void setExposureDuration(float seconds);
+
+ // Calculate scene information for current hour and the time offset since
+ // the hour. Must be called at least once before calling getLuminousExposure.
+ // Resets pixel readout location to 0,0
+ void calculateScene(nsecs_t time);
+
+ // Set sensor pixel readout location.
+ void setReadoutPixel(int x, int y);
+
+ // Get sensor response in physical units (electrons) for light hitting the
+ // current readout pixel, after passing through color filters. The readout
+ // pixel will be auto-incremented. The returned array can be indexed with
+ // ColorChannels.
+ const uint32_t* getPixelElectrons();
+
+ enum ColorChannels {
+ R = 0,
+ Gr,
+ Gb,
+ B,
+ Y,
+ Cb,
+ Cr,
+ NUM_CHANNELS
+ };
+
+ private:
+ // Sensor color filtering coefficients in XYZ
+ float mFilterR[3];
+ float mFilterGr[3];
+ float mFilterGb[3];
+ float mFilterB[3];
+
+ int mOffsetX, mOffsetY;
+ int mMapDiv;
+
+ int mHandshakeX, mHandshakeY;
+
+ int mSensorWidth;
+ int mSensorHeight;
+ int mCurrentX;
+ int mCurrentY;
+ int mSubX;
+ int mSubY;
+ int mSceneX;
+ int mSceneY;
+ int mSceneIdx;
+ uint32_t *mCurrentSceneMaterial;
+
+ int mHour;
+ float mExposureDuration;
+ float mSensorSensitivity;
+
+ enum Materials {
+ GRASS = 0,
+ GRASS_SHADOW,
+ HILL,
+ WALL,
+ ROOF,
+ DOOR,
+ CHIMNEY,
+ WINDOW,
+ SUN,
+ SKY,
+ MOON,
+ NUM_MATERIALS
+ };
+
+ uint32_t mCurrentColors[NUM_MATERIALS*NUM_CHANNELS];
+
+ /**
+ * Constants for scene definition. These are various degrees of approximate.
+ */
+
+ // Fake handshake parameters. Two shake frequencies per axis, plus magnitude
+ // as a fraction of a scene tile, and relative magnitudes for the frequencies
+ static const float kHorizShakeFreq1;
+ static const float kHorizShakeFreq2;
+ static const float kVertShakeFreq1;
+ static const float kVertShakeFreq2;
+ static const float kFreq1Magnitude;
+ static const float kFreq2Magnitude;
+
+ static const float kShakeFraction;
+
+ // RGB->YUV conversion
+ static const float kRgb2Yuv[12];
+
+ // Aperture of imaging lens
+ static const float kAperture;
+
+ // Sun, moon illuminance levels in 2-hour increments. These don't match any
+ // real day anywhere.
+ static const uint32_t kTimeStep = 2;
+ static const float kSunlight[];
+ static const float kMoonlight[];
+ static const int kSunOverhead;
+ static const int kMoonOverhead;
+
+ // Illumination levels for various conditions, in lux
+ static const float kDirectSunIllum;
+ static const float kDaylightShadeIllum;
+ static const float kSunsetIllum;
+ static const float kTwilightIllum;
+ static const float kFullMoonIllum;
+ static const float kClearNightIllum;
+ static const float kStarIllum;
+ static const float kLivingRoomIllum;
+
+ // Chromaticity of various illumination sources
+ static const float kIncandescentXY[2];
+ static const float kDirectSunlightXY[2];
+ static const float kDaylightXY[2];
+ static const float kNoonSkyXY[2];
+ static const float kMoonlightXY[2];
+ static const float kSunsetXY[2];
+
+ static const uint8_t kSelfLit;
+ static const uint8_t kShadowed;
+ static const uint8_t kSky;
+
+ static const float kMaterials_xyY[NUM_MATERIALS][3];
+ static const uint8_t kMaterialsFlags[NUM_MATERIALS];
+
+ static const int kSceneWidth;
+ static const int kSceneHeight;
+ static const uint8_t kScene[];
+};
+
+}
+
+#endif // HW_EMULATOR_CAMERA2_SCENE_H
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