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poljvdpoljvd
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Merge pull request #95 from ntim/support_for_philips_hue
Support for the Philips Hue system.
2 parents 515208c + 1ee26e8 commit 28352b1

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‎libsrc/leddevice/CMakeLists.txt

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@@ -29,6 +29,7 @@ SET(Leddevice_HEADERS
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${CURRENT_SOURCE_DIR}/LedDeviceSedu.h
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${CURRENT_SOURCE_DIR}/LedDeviceTest.h
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${CURRENT_SOURCE_DIR}/LedDeviceHyperionUsbasp.h
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${CURRENT_SOURCE_DIR}/LedDevicePhilipsHue.h
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)
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SET(Leddevice_SOURCES
@@ -44,6 +45,7 @@ SET(Leddevice_SOURCES
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${CURRENT_SOURCE_DIR}/LedDeviceSedu.cpp
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${CURRENT_SOURCE_DIR}/LedDeviceTest.cpp
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${CURRENT_SOURCE_DIR}/LedDeviceHyperionUsbasp.cpp
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${CURRENT_SOURCE_DIR}/LedDevicePhilipsHue.cpp
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)
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if(ENABLE_SPIDEV)

‎libsrc/leddevice/LedDeviceFactory.cpp

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#include "LedDeviceSedu.h"
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#include "LedDeviceTest.h"
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#include "LedDeviceHyperionUsbasp.h"
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#include "LedDevicePhilipsHue.h"
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LedDevice * LedDeviceFactory::construct(const Json::Value & deviceConfig)
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{
@@ -159,6 +160,11 @@ LedDevice * LedDeviceFactory::construct(const Json::Value & deviceConfig)
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deviceHyperionUsbasp->open();
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device = deviceHyperionUsbasp;
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}
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else if (type == "philipshue")
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{
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const std::string output = deviceConfig["output"].asString();
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device = new LedDevicePhilipsHue(output);
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}
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else if (type == "test")
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{
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const std::string output = deviceConfig["output"].asString();

‎libsrc/leddevice/LedDevicePhilipsHue.cpp

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// 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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LedDevicePhilipsHue::LedDevicePhilipsHue(const std::string& output) :
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host(output.c_str()), username("newdeveloper") {
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http = new QHttp(host);
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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 (!statesSaved()) {
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saveStates(ledValues.size());
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}
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// Iterate through colors and set light states.
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unsigned int lightId = 1;
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for (const ColorRgb& color : ledValues) {
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float x, y, b;
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// Scale colors from [0, 255] to [0, 1] and convert to xy space.
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rgbToXYBrightness(color.red / 255.0f, color.green / 255.0f, color.blue / 255.0f, x, y, b);
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// Send adjust color command in JSON format.
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put(getStateRoute(lightId), QString("{\"xy\": [%1, %2]}").arg(x).arg(y));
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// Send brightness color command in JSON format.
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put(getStateRoute(lightId), QString("{\"bri\": %1}").arg(qRound(b * 255.0f)));
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// Next light id.
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lightId++;
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}
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return 0;
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}
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int LedDevicePhilipsHue::switchOff() {
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// If light states have been saved before, ...
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if (statesSaved()) {
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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("Content-Length", QString("%1").arg(content.size()));
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http->setHost(host);
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http->request(header, content.toAscii());
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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 light states.
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states.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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// 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(i + 1));
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// Parse JSON.
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Json::Value state;
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if (!reader.parse(QString(response).toStdString(), state)) {
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// Error occured, break loop.
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break;
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}
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// Save state object.
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states.push_back(QString(writer.write(state["state"]).c_str()));
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}
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}
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void LedDevicePhilipsHue::restoreStates() {
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unsigned int lightId = 1;
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for (QString state : states) {
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put(getStateRoute(lightId), state);
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lightId++;
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}
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// Clear saved light states.
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states.clear();
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}
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bool LedDevicePhilipsHue::statesSaved() {
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return !states.empty();
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}
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void LedDevicePhilipsHue::rgbToXYBrightness(float red, float green, float blue, float& x, float& y, float& brightness) {
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// Apply gamma correction.
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red = (red > 0.04045f) ? qPow((red + 0.055f) / (1.0f + 0.055f), 2.4f) : (red / 12.92f);
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green = (green > 0.04045f) ? qPow((green + 0.055f) / (1.0f + 0.055f), 2.4f) : (green / 12.92f);
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blue = (blue > 0.04045f) ? qPow((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 = red * 0.649926f + green * 0.103455f + blue * 0.197109f;
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float Y = red * 0.234327f + green * 0.743075f + blue * 0.022598f;
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float Z = red * 0.0000000f + green * 0.053077f + blue * 1.035763f;
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// Convert to x,y space.
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x = X / (X + Y + Z);
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y = Y / (X + Y + Z);
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if (isnan(x)) {
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x = 0.0f;
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}
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if (isnan(y)) {
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y = 0.0f;
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}
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// Brightness is simply Y in the XYZ space.
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brightness = Y;
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}

‎libsrc/leddevice/LedDevicePhilipsHue.h

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#pragma once
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// STL includes
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#include <string>
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// Qt includes
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#include <QString>
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#include <QHttp>
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// Leddevice includes
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#include <leddevice/LedDevice.h>
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/**
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* Implementation for the Philips Hue system.
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*
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* To use set the device to "philipshue".
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* Uses the official Philips Hue API (http://developers.meethue.com).
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* Framegrabber must be limited to 10 Hz / numer of lights to avoid rate limitation by the hue bridge.
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* Create a new API user name "newdeveloper" on the bridge (http://developers.meethue.com/gettingstarted.html)
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*/
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class LedDevicePhilipsHue: public LedDevice {
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public:
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///
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/// Constructs the device.
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///
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/// @param output the ip address of the bridge
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///
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LedDevicePhilipsHue(const std::string& output);
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///
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/// Destructor of this device
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///
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virtual ~LedDevicePhilipsHue();
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///
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/// Sends the given led-color values via put request to the hue system
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///
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/// @param ledValues The color-value per led
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///
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/// @return Zero on success else negative
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///
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virtual int write(const std::vector<ColorRgb> & ledValues);
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/// Switch the leds off
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virtual int switchOff();
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private:
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/// Array to save the light states.
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std::vector<QString> states;
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/// Ip address of the bridge
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QString host;
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/// User name for the API ("newdeveloper")
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QString username;
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/// Qhttp object for sending requests.
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QHttp* http;
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///
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/// Sends a HTTP GET request (blocking).
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///
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/// @param route the URI of the request
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///
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/// @return response of the request
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///
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QByteArray get(QString route);
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///
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/// Sends a HTTP PUT request (non-blocking).
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///
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/// @param route the URI of the request
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///
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/// @param content content of the request
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///
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void put(QString route, QString content);
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///
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/// @param lightId the id of the hue light (starting from 1)
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///
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/// @return the URI of the light state for PUT requests.
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///
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QString getStateRoute(unsigned int lightId);
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///
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/// @param lightId the id of the hue light (starting from 1)
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///
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/// @return the URI of the light for GET requests.
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///
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QString getRoute(unsigned int lightId);
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///
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/// Queries the status of all lights and saves it.
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///
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/// @param nLights the number of lights
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///
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void saveStates(unsigned int nLights);
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/// Restores the status of all lights.
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void restoreStates();
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///
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/// @return true if light states have been saved.
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///
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bool statesSaved();
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///
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/// Converts an RGB color to the Hue xy color space and brightness
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/// https://github.com/PhilipsHue/PhilipsHueSDK-iOS-OSX/blob/master/ApplicationDesignNotes/RGB%20to%20xy%20Color%20conversion.md
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///
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/// @param red the red component in [0, 1]
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///
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/// @param green the green component in [0, 1]
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///
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/// @param blue the blue component in [0, 1]
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///
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/// @param x converted x component
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///
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/// @param y converted y component
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///
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/// @param brightness converted brightness component
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///
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void rgbToXYBrightness(float red, float green, float blue, float& x, float& y, float& brightness);
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};

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