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305 lines
10 KiB
C++
Executable File
305 lines
10 KiB
C++
Executable File
// Local-Hyperion includes
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#include "LedDevicePhilipsHue.h"
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// jsoncpp includes
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#include <json/json.h>
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// qt includes
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#include <QtCore/qmath.h>
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#include <QUrl>
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#include <QHttpRequestHeader>
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#include <QEventLoop>
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#include <set>
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bool operator ==(CiColor p1, CiColor p2) {
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return (p1.x == p2.x) && (p1.y == p2.y) && (p1.bri == p2.bri);
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}
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bool operator !=(CiColor p1, CiColor p2) {
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return !(p1 == p2);
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}
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PhilipsHueLight::PhilipsHueLight(unsigned int id, QString originalState, QString modelId) :
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id(id), originalState(originalState) {
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// Hue system model ids (http://www.developers.meethue.com/documentation/supported-lights).
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// Light strips, color iris, ...
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const std::set<QString> GAMUT_A_MODEL_IDS = { "LLC001", "LLC005", "LLC006", "LLC007", "LLC010", "LLC011", "LLC012",
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"LLC013", "LST001" };
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// Hue bulbs, spots, ...
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const std::set<QString> GAMUT_B_MODEL_IDS = { "LCT001", "LCT002", "LCT003", "LLM001" };
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// Find id in the sets and set the appropiate color space.
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if (GAMUT_A_MODEL_IDS.find(modelId) != GAMUT_A_MODEL_IDS.end()) {
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colorSpace.red = {0.703f, 0.296f};
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colorSpace.green = {0.2151f, 0.7106f};
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colorSpace.blue = {0.138f, 0.08f};
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} else if (GAMUT_B_MODEL_IDS.find(modelId) != GAMUT_B_MODEL_IDS.end()) {
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colorSpace.red = {0.675f, 0.322f};
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colorSpace.green = {0.4091f, 0.518f};
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colorSpace.blue = {0.167f, 0.04f};
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} else {
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colorSpace.red = {1.0f, 0.0f};
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colorSpace.green = {0.0f, 1.0f};
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colorSpace.blue = {0.0f, 0.0f};
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}
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// Initialize black color.
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black = rgbToCiColor(0.0f, 0.0f, 0.0f);
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// Initialize color with black
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color = {black.x, black.y, black.bri};
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}
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float PhilipsHueLight::crossProduct(CiColor p1, CiColor p2) {
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return p1.x * p2.y - p1.y * p2.x;
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}
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bool PhilipsHueLight::isPointInLampsReach(CiColor p) {
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CiColor v1 = { colorSpace.green.x - colorSpace.red.x, colorSpace.green.y - colorSpace.red.y };
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CiColor v2 = { colorSpace.blue.x - colorSpace.red.x, colorSpace.blue.y - colorSpace.red.y };
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CiColor q = { p.x - colorSpace.red.x, p.y - colorSpace.red.y };
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float s = crossProduct(q, v2) / crossProduct(v1, v2);
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float t = crossProduct(v1, q) / crossProduct(v1, v2);
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if ((s >= 0.0f) && (t >= 0.0f) && (s + t <= 1.0f)) {
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return true;
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}
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return false;
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}
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CiColor PhilipsHueLight::getClosestPointToPoint(CiColor a, CiColor b, CiColor p) {
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CiColor AP = { p.x - a.x, p.y - a.y };
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CiColor AB = { b.x - a.x, b.y - a.y };
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float ab2 = AB.x * AB.x + AB.y * AB.y;
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float ap_ab = AP.x * AB.x + AP.y * AB.y;
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float t = ap_ab / ab2;
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if (t < 0.0f) {
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t = 0.0f;
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} else if (t > 1.0f) {
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t = 1.0f;
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}
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return {a.x + AB.x * t, a.y + AB.y * t};
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}
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float PhilipsHueLight::getDistanceBetweenTwoPoints(CiColor p1, CiColor p2) {
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// Horizontal difference.
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float dx = p1.x - p2.x;
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// Vertical difference.
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float dy = p1.y - p2.y;
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// Absolute value.
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return sqrt(dx * dx + dy * dy);
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}
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CiColor PhilipsHueLight::rgbToCiColor(float red, float green, float blue) {
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// Apply gamma correction.
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float r = (red > 0.04045f) ? powf((red + 0.055f) / (1.0f + 0.055f), 2.4f) : (red / 12.92f);
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float g = (green > 0.04045f) ? powf((green + 0.055f) / (1.0f + 0.055f), 2.4f) : (green / 12.92f);
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float b = (blue > 0.04045f) ? powf((blue + 0.055f) / (1.0f + 0.055f), 2.4f) : (blue / 12.92f);
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// Convert to XYZ space.
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float X = r * 0.649926f + g * 0.103455f + b * 0.197109f;
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float Y = r * 0.234327f + g * 0.743075f + b * 0.022598f;
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float Z = r * 0.0000000f + g * 0.053077f + b * 1.035763f;
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// Convert to x,y space.
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float cx = X / (X + Y + Z);
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float cy = Y / (X + Y + Z);
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if (isnan(cx)) {
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cx = 0.0f;
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}
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if (isnan(cy)) {
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cy = 0.0f;
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}
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// Brightness is simply Y in the XYZ space.
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CiColor xy = { cx, cy, Y };
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// Check if the given XY value is within the color reach of our lamps.
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if (!isPointInLampsReach(xy)) {
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// It seems the color is out of reach let's find the closes color we can produce with our lamp and send this XY value out.
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CiColor pAB = getClosestPointToPoint(colorSpace.red, colorSpace.green, xy);
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CiColor pAC = getClosestPointToPoint(colorSpace.blue, colorSpace.red, xy);
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CiColor pBC = getClosestPointToPoint(colorSpace.green, colorSpace.blue, xy);
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// Get the distances per point and see which point is closer to our Point.
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float dAB = getDistanceBetweenTwoPoints(xy, pAB);
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float dAC = getDistanceBetweenTwoPoints(xy, pAC);
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float dBC = getDistanceBetweenTwoPoints(xy, pBC);
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float lowest = dAB;
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CiColor closestPoint = pAB;
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if (dAC < lowest) {
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lowest = dAC;
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closestPoint = pAC;
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}
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if (dBC < lowest) {
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lowest = dBC;
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closestPoint = pBC;
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}
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// Change the xy value to a value which is within the reach of the lamp.
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xy.x = closestPoint.x;
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xy.y = closestPoint.y;
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}
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return xy;
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}
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LedDevicePhilipsHue::LedDevicePhilipsHue(const std::string& output, const std::string& username, bool switchOffOnBlack,
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int transitiontime, std::vector<unsigned int> lightIds) :
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host(output.c_str()), username(username.c_str()), switchOffOnBlack(switchOffOnBlack), transitiontime(
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transitiontime), lightIds(lightIds) {
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http = new QHttp(host);
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timer.setInterval(3000);
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timer.setSingleShot(true);
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connect(&timer, SIGNAL(timeout()), this, SLOT(restoreStates()));
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}
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LedDevicePhilipsHue::~LedDevicePhilipsHue() {
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delete http;
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}
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int LedDevicePhilipsHue::write(const std::vector<ColorRgb> & ledValues) {
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// Save light states if not done before.
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if (!areStatesSaved()) {
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saveStates((unsigned int) ledValues.size());
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switchOn((unsigned int) ledValues.size());
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}
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// If there are less states saved than colors given, then maybe something went wrong before.
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if (lights.size() != ledValues.size()) {
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restoreStates();
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return 0;
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}
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// Iterate through colors and set light states.
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unsigned int idx = 0;
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for (const ColorRgb& color : ledValues) {
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// Get lamp.
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PhilipsHueLight& lamp = lights.at(idx);
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// Scale colors from [0, 255] to [0, 1] and convert to xy space.
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CiColor xy = lamp.rgbToCiColor(color.red / 255.0f, color.green / 255.0f, color.blue / 255.0f);
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// Write color if color has been changed.
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if (xy != lamp.color) {
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// Switch on if the lamp has been previously switched off.
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if (switchOffOnBlack && lamp.color == lamp.black) {
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put(getStateRoute(lamp.id), QString("{\"on\": true}"));
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}
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// Send adjust color and brightness command in JSON format.
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// We have to set the transition time each time.
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put(getStateRoute(lamp.id),
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QString("{\"xy\": [%1, %2], \"bri\": %3, \"transitiontime\": %4}").arg(xy.x).arg(xy.y).arg(
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qRound(xy.bri * 255.0f)).arg(transitiontime));
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}
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// Switch lamp off if switchOffOnBlack is enabled and the lamp is currently on.
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if (switchOffOnBlack) {
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// From black to a color.
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if (lamp.color == lamp.black && xy != lamp.black) {
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put(getStateRoute(lamp.id), QString("{\"on\": true}"));
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}
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// From a color to black.
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else if (lamp.color != lamp.black && xy == lamp.black) {
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put(getStateRoute(lamp.id), QString("{\"on\": false}"));
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}
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}
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// Remember last color.
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lamp.color = xy;
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// Next light id.
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idx++;
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}
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timer.start();
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return 0;
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}
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int LedDevicePhilipsHue::switchOff() {
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timer.stop();
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// If light states have been saved before, ...
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if (areStatesSaved()) {
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// ... restore them.
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restoreStates();
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}
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return 0;
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}
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void LedDevicePhilipsHue::put(QString route, QString content) {
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QString url = QString("/api/%1/%2").arg(username).arg(route);
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QHttpRequestHeader header("PUT", url);
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header.setValue("Host", host);
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header.setValue("Accept-Encoding", "identity");
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header.setValue("Connection", "keep-alive");
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header.setValue("Content-Length", QString("%1").arg(content.size()));
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QEventLoop loop;
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// Connect requestFinished signal to quit slot of the loop.
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loop.connect(http, SIGNAL(requestFinished(int, bool)), SLOT(quit()));
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// Perfrom request
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http->request(header, content.toAscii());
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// Go into the loop until the request is finished.
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loop.exec();
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}
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QByteArray LedDevicePhilipsHue::get(QString route) {
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QString url = QString("/api/%1/%2").arg(username).arg(route);
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// Event loop to block until request finished.
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QEventLoop loop;
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// Connect requestFinished signal to quit slot of the loop.
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loop.connect(http, SIGNAL(requestFinished(int, bool)), SLOT(quit()));
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// Perfrom request
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http->get(url);
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// Go into the loop until the request is finished.
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loop.exec();
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// Read all data of the response.
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return http->readAll();
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}
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QString LedDevicePhilipsHue::getStateRoute(unsigned int lightId) {
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return QString("lights/%1/state").arg(lightId);
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}
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QString LedDevicePhilipsHue::getRoute(unsigned int lightId) {
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return QString("lights/%1").arg(lightId);
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}
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void LedDevicePhilipsHue::saveStates(unsigned int nLights) {
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// Clear saved lamps.
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lights.clear();
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// Use json parser to parse reponse.
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Json::Reader reader;
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Json::FastWriter writer;
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// Create light ids if none supplied by the user.
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if (lightIds.size() != nLights) {
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lightIds.clear();
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for (unsigned int i = 0; i < nLights; i++) {
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lightIds.push_back(i + 1);
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}
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}
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// Iterate lights.
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for (unsigned int i = 0; i < nLights; i++) {
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// Read the response.
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QByteArray response = get(getRoute(lightIds.at(i)));
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// Parse JSON.
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Json::Value json;
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if (!reader.parse(QString(response).toStdString(), json)) {
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// Error occured, break loop.
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break;
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}
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// Get state object values which are subject to change.
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Json::Value state(Json::objectValue);
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state["on"] = json["state"]["on"];
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if (json["state"]["on"] == true) {
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state["xy"] = json["state"]["xy"];
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state["bri"] = json["state"]["bri"];
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}
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// Determine the model id.
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QString modelId = QString(writer.write(json["modelid"]).c_str()).trimmed().replace("\"", "");
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QString originalState = QString(writer.write(state).c_str()).trimmed();
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// Save state object.
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lights.push_back(PhilipsHueLight(lightIds.at(i), originalState, modelId));
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}
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}
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void LedDevicePhilipsHue::switchOn(unsigned int nLights) {
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for (PhilipsHueLight light : lights) {
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put(getStateRoute(light.id), "{\"on\": true}");
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}
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}
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void LedDevicePhilipsHue::restoreStates() {
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for (PhilipsHueLight light : lights) {
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put(getStateRoute(light.id), light.originalState);
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}
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// Clear saved light states.
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lights.clear();
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}
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bool LedDevicePhilipsHue::areStatesSaved() {
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return !lights.empty();
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}
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