homescreen/src/mastervolume.cpp

   1 /*
   2  * Copyright (C) 2017 Konsulko Group
   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 #include "mastervolume.h"
  18 #include <QJsonObject>
  19 #include <QTimer>
  20 #include <QtDebug>
  21
  22 #define MASTER_CONTROL "Master Playback"
  23
  24 MasterVolume::MasterVolume(QObject* parent)
  25         : QObject(parent)
  26         , m_volume{50}
  27 {
  28         connect(&m_client, SIGNAL(connected()), this, SLOT(onClientConnected()));
  29         connect(&m_client, SIGNAL(disconnected()), this, SLOT(onClientDisconnected()));
  30         connect(&m_client, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(onClientError(QAbstractSocket::SocketError)));
  31         connect(&m_client, SIGNAL(eventReceived(QString, const QJsonValue&)), this, SLOT(onClientEventReceived(QString, const QJsonValue&)));
  32 }
  33
  34 void MasterVolume::open(const QUrl& url)
  35 {
  36         m_url = url;
  37         TryOpen();
  38 }
  39
  40 qint32 MasterVolume::getVolume() const
  41 {
  42         return m_volume;
  43 }
  44
  45 void MasterVolume::setVolume(qint32 volume)
  46 {
  47         if (m_volume != volume)
  48         {
  49                 m_volume = volume;
  50                 QJsonObject arg;
  51                 arg.insert("control", MASTER_CONTROL);
  52                 double v = (double) volume / 100.0;
  53                 arg.insert("value", v);
  54                 m_client.call("audiomixer", "volume", arg);
  55         }
  56 }
  57
  58 void MasterVolume::onClientConnected()
  59 {
  60         QJsonObject arg;
  61         arg.insert("control", MASTER_CONTROL);
  62         m_client.call("audiomixer", "volume", arg, [this](bool r, const QJsonValue& v) {
  63                 if (r && v.isObject()) {
  64                         int volume = v.toObject()["response"].toObject()["volume"].toDouble() * 100;
  65                         volume = qBound(0, volume, 100);
  66                         if (m_volume != volume)
  67                         {
  68                                 m_volume = volume;
  69                                 emit VolumeChanged();
  70                         }
  71                 }
  72
  73                 QJsonObject arg;
  74                 arg.insert("event", "volume_changed");
  75                 m_client.call("audiomixer", "subscribe", arg);
  76         });
  77 }
  78
  79 void MasterVolume::onClientDisconnected()
  80 {
  81         qDebug() << "MasterVolume::onClientDisconnected!";
  82         QTimer::singleShot(1000, this, SLOT(TryOpen()));
  83 }
  84
  85 void MasterVolume::onClientError(QAbstractSocket::SocketError se)
  86 {
  87         qDebug() << "MasterVolume::onClientError: " << se;
  88 }
  89
  90 void MasterVolume::onClientEventReceived(QString name, const QJsonValue& data)
  91 {
  92         qDebug() << "MasterVolume::onClientEventReceived[" << name << "]: " << data;
  93         if (name == "audiomixer/volume_changed")
  94         {
  95                 QString ctlName = data.toObject()["control"].toString();
  96
  97                 if (ctlName != MASTER_CONTROL)
  98                         return;
  99
 100                 int volume = data.toObject()["value"].toDouble() * 100;
 101                 volume = qBound(0, volume, 100);
 102                 if (m_volume != volume)
 103                 {
 104                         m_volume = volume;
 105                         emit VolumeChanged();
 106                 }
 107         }
 108 }
 109
 110 void MasterVolume::TryOpen()
 111 {
 112         m_client.open(m_url);
 113 }