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Code Issues Releases Wiki Activity

State of all lights is saved and restored on switchOff().

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Former-commit-id: 1ee26e8c01d90456424c1b5ea3f113dfd0ff6525
This commit is contained in:
Tim Niggemann 2014-04-28 14:32:37 +02:00
parent ebb22cdc87
commit ab5e17e105
2 changed files with 113 additions and 16 deletions
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83
libsrc/leddevice/LedDevicePhilipsHue.cpp
View File

@ -1,16 +1,18 @@
// Local-Hyperion includes
#include "LedDevicePhilipsHue.h"
#include <iostream>
// jsoncpp includes
#include <json/json.h>
// qt includes
#include <QtCore/qmath.h>
#include <QUrl>
#include <QHttpRequestHeader>
#include <QThread>
#include <QEventLoop>
LedDevicePhilipsHue::LedDevicePhilipsHue(const std::string& output) :
host(output.c_str()), username("newdeveloper") {
http = new QHttp(host, 80);
host(output.c_str()), username("newdeveloper") {
http = new QHttp(host);
}
LedDevicePhilipsHue::~LedDevicePhilipsHue() {
@ -18,15 +20,20 @@ LedDevicePhilipsHue::~LedDevicePhilipsHue() {
}
int LedDevicePhilipsHue::write(const std::vector<ColorRgb> & ledValues) {
// Save light states if not done before.
if (!statesSaved()) {
saveStates(ledValues.size());
}
// Iterate through colors and set light states.
unsigned int lightId = 1;
for (const ColorRgb& color : ledValues) {
float x, y, b;
// Scale colors from [0, 255] to [0, 1] and convert to xy space.
rgbToXYBrightness(color.red / 255.0f, color.green / 255.0f, color.blue / 255.0f, x, y, b);
// Send adjust color command in JSON format.
put(getRoute(lightId), QString("{\"xy\": [%1, %2]}").arg(x).arg(y));
put(getStateRoute(lightId), QString("{\"xy\": [%1, %2]}").arg(x).arg(y));
// Send brightness color command in JSON format.
put(getRoute(lightId), QString("{\"bri\": %1}").arg(qRound(b * 255.0f)));
put(getStateRoute(lightId), QString("{\"bri\": %1}").arg(qRound(b * 255.0f)));
// Next light id.
lightId++;
}
@ -34,6 +41,11 @@ int LedDevicePhilipsHue::write(const std::vector<ColorRgb> & ledValues) {
}
int LedDevicePhilipsHue::switchOff() {
// If light states have been saved before, ...
if (statesSaved()) {
// ... restore them.
restoreStates();
}
return 0;
}
@ -47,15 +59,68 @@ void LedDevicePhilipsHue::put(QString route, QString content) {
http->request(header, content.toAscii());
}
QString LedDevicePhilipsHue::getRoute(unsigned int lightId) {
QByteArray LedDevicePhilipsHue::get(QString route) {
QString url = QString("/api/%1/%2").arg(username).arg(route);
// Event loop to block until request finished.
QEventLoop loop;
// Connect requestFinished signal to quit slot of the loop.
loop.connect(http, SIGNAL(requestFinished(int, bool)), SLOT(quit()));
// Perfrom request
http->get(url);
// Go into the loop until the request is finished.
loop.exec();
// Read all data of the response.
return http->readAll();
}
QString LedDevicePhilipsHue::getStateRoute(unsigned int lightId) {
return QString("lights/%1/state").arg(lightId);
}
QString LedDevicePhilipsHue::getRoute(unsigned int lightId) {
return QString("lights/%1").arg(lightId);
}
void LedDevicePhilipsHue::saveStates(unsigned int nLights) {
// Clear saved light states.
states.clear();
// Use json parser to parse reponse.
Json::Reader reader;
Json::FastWriter writer;
// Iterate lights.
for (unsigned int i = 0; i < nLights; i++) {
// Read the response.
QByteArray response = get(getRoute(i + 1));
// Parse JSON.
Json::Value state;
if (!reader.parse(QString(response).toStdString(), state)) {
// Error occured, break loop.
break;
}
// Save state object.
states.push_back(QString(writer.write(state["state"]).c_str()));
}
}
void LedDevicePhilipsHue::restoreStates() {
unsigned int lightId = 1;
for (QString state : states) {
put(getStateRoute(lightId), state);
lightId++;
}
// Clear saved light states.
states.clear();
}
bool LedDevicePhilipsHue::statesSaved() {
return !states.empty();
}
void LedDevicePhilipsHue::rgbToXYBrightness(float red, float green, float blue, float& x, float& y, float& brightness) {
// Apply gamma correction.
red = (red > 0.04045f) ? qPow((red + 0.055f) / (1.0f + 0.055f), 2.4f) : (red / 12.92f);
green = (green > 0.04045f) ? qPow ((green + 0.055f) / (1.0f + 0.055f), 2.4f) : (green / 12.92f);
blue = (blue > 0.04045f) ? qPow ((blue + 0.055f) / (1.0f + 0.055f), 2.4f) : (blue / 12.92f);
green = (green > 0.04045f) ? qPow((green + 0.055f) / (1.0f + 0.055f), 2.4f) : (green / 12.92f);
blue = (blue > 0.04045f) ? qPow((blue + 0.055f) / (1.0f + 0.055f), 2.4f) : (blue / 12.92f);
// Convert to XYZ space.
float X = red * 0.649926f + green * 0.103455f + blue * 0.197109f;
float Y = red * 0.234327f + green * 0.743075f + blue * 0.022598f;

46
libsrc/leddevice/LedDevicePhilipsHue.h
View File

@ -9,7 +9,7 @@
// Leddevice includes
#include <leddevice/LedDevice.h>
/**
* Implementation for the Philips Hue system.
*
@ -18,8 +18,7 @@
* Framegrabber must be limited to 10 Hz / numer of lights to avoid rate limitation by the hue bridge.
* Create a new API user name "newdeveloper" on the bridge (http://developers.meethue.com/gettingstarted.html)
*/
class LedDevicePhilipsHue : public LedDevice
{
class LedDevicePhilipsHue: public LedDevice {
public:
///
/// Constructs the device.
@ -46,14 +45,26 @@ public:
virtual int switchOff();
private:
/// Array to save the light states.
std::vector<QString> states;
/// Ip address of the bridge
QString host;
/// User name for the API ("newdeveloper")
QString username;
/// Qhttp object for sending requests.
QHttp* http;
///
/// Sends a HTTP PUT request
/// Sends a HTTP GET request (blocking).
///
/// @param route the URI of the request
///
/// @return response of the request
///
QByteArray get(QString route);
///
/// Sends a HTTP PUT request (non-blocking).
///
/// @param route the URI of the request
///
@ -64,10 +75,32 @@ private:
///
/// @param lightId the id of the hue light (starting from 1)
///
/// @return the URI of the light
/// @return the URI of the light state for PUT requests.
///
QString getStateRoute(unsigned int lightId);
///
/// @param lightId the id of the hue light (starting from 1)
///
/// @return the URI of the light for GET requests.
///
QString getRoute(unsigned int lightId);
///
/// Queries the status of all lights and saves it.
///
/// @param nLights the number of lights
///
void saveStates(unsigned int nLights);
/// Restores the status of all lights.
void restoreStates();
///
/// @return true if light states have been saved.
///
bool statesSaved();
///
/// Converts an RGB color to the Hue xy color space and brightness
/// https://github.com/PhilipsHue/PhilipsHueSDK-iOS-OSX/blob/master/ApplicationDesignNotes/RGB%20to%20xy%20Color%20conversion.md
@ -84,7 +117,6 @@ private:
///
/// @param brightness converted brightness component
///
void rgbToXYBrightness(float red, float green, float blue,
float& x, float& y, float& brightness);
void rgbToXYBrightness(float red, float green, float blue, float& x, float& y, float& brightness);
};