make use of alsacore and hal bindings to control audio volume

Change-Id: Ib7e90a7d2a148a067566bc04929fda445b46ab45
Signed-off-by: Loïc Collignon <loic.collignon@iot.bzh>

14 files changed, 655 insertions, 818 deletions

diff --git a/app/Mixer.qml b/app/Mixer.qml
index 96875e0..2b6d5cc 100644
--- a/app/Mixer.qml
+++ b/app/Mixer.qml
@@ -18,11 +18,21 @@ import QtQuick 2.6
 import QtQuick.Layouts 1.1
 import QtQuick.Controls 2.0
 import AGL.Demo.Controls 1.0
-import PaControlModel 1.0
+import Mixer 1.0
 
 ApplicationWindow {
 	id: root
 
+    Mixer {
+        id: mixer
+        Component.objectName: {
+            mixer.open(bindingAddress)
+        }
+        onMasterVolumeChanged: sliderMasterVolume.value = masterVolume
+        onPcmVolumeChanged: sliderPcmVolume.value = pcmVolume
+        onMicrophoneVolumeChanged: sliderMicrophoneVolume.value = microphoneVolume
+    }
+
 	Label { 
 		id: title
 		font.pixelSize: 48
@@ -30,69 +40,92 @@ ApplicationWindow {
 		anchors.horizontalCenter: parent.horizontalCenter
 	}
 
-	Component {
-		id: ctldesc
-		Label {
-			font.pixelSize: 32
-			width: listView.width
-			wrapMode: Text.WordWrap
-			property var typeString: {modelType ? "Output" : "Input"}
-			text: "[" + typeString + " #" + modelCIndex + "]: " + modelDesc
-		}
-	}
+    ColumnLayout {
+        anchors.margins: 80
+        anchors.top: title.bottom
+        anchors.left: parent.left
+        anchors.right: parent.right
 
-	Component {
-		id: empty
-		Item {
-		}
-	}
+        ComboBox {
+            id: soundCardSelector
+            anchors.left: parent.left
+            anchors.right: parent.right
+            model: mixer.hals
+            onCurrentIndexChanged: mixer.ActiveHal = currentIndex
+        }
 
-	ListView {
-		id: listView
-		anchors.left: parent.left
-		anchors.top: title.bottom
-		anchors.margins: 80
-		anchors.fill: parent
-		model: PaControlModel { objectName: "pacm" }
-		delegate: ColumnLayout {
-			width: parent.width
-			spacing: 40
-			Connections {
-				target: listView.model
-				onDataChanged: slider.value = volume
-			}
-			Loader {
-				property int modelType: type
-				property int modelCIndex: cindex
-				property string modelDesc: name
-				sourceComponent: (channel == 0) ? ctldesc : empty
-			}
-			RowLayout {
-				Layout.minimumHeight: 75
-				Label {
-					font.pixelSize: 24
-					text: cdesc
-					Layout.minimumWidth: 150
-				}
-				Label {
-					font.pixelSize: 24
-					text: "0 %"
-				}
-				Slider {
-					id: slider
-					Layout.fillWidth: true
-					from: 0
-					to: 65536
-					stepSize: 256
-					snapMode: Slider.SnapOnRelease
-					onValueChanged: volume = value
-					Component.onCompleted: value = volume
-				}
-				Label {
-					font.pixelSize: 24
-					text: "100 %"
-				}
-			}
-		}
-	}
+        RowLayout {
+            Layout.minimumHeight: 75
+            Label {
+                font.pixelSize: 24
+                text: "Master"
+                Layout.minimumWidth: 150
+            }
+            Label {
+                id: textMasterVolume
+                font.pixelSize: 24
+                text: "0 %"
+            }
+            Slider {
+                id: sliderMasterVolume
+                Layout.fillWidth: true
+                from: 0
+                to: 100
+                stepSize: 1
+                snapMode: Slider.SnapOnRelease
+                onValueChanged: {
+                    textMasterVolume.text = value + " %"
+                    mixer.masterVolume = value
+                }
+            }
+        }
+/*
+        RowLayout {
+            Layout.minimumHeight: 75
+            Label {
+                font.pixelSize: 24
+                text: "PCM"
+                Layout.minimumWidth: 150
+            }
+            Label {
+                font.pixelSize: 24
+                text: "0 %"
+            }
+            Slider {
+                id: sliderPcmVolume
+                Layout.fillWidth: true
+                from: 0
+                to: 100
+                stepSize: 1
+                snapMode: Slider.SnapOnRelease
+                onValueChanged: mixer.pcmVolume = value
+            }
+        }
+*/
+        RowLayout {
+            Layout.minimumHeight: 75
+            Label {
+                font.pixelSize: 24
+                text: "Microphone"
+                Layout.minimumWidth: 150
+            }
+            Label {
+                id: textMicrophoneVolume
+                font.pixelSize: 24
+                text: "0 %"
+            }
+            Slider {
+                id: sliderMicrophoneVolume
+                Layout.fillWidth: true
+                from: 0
+                to: 100
+                stepSize: 1
+                snapMode: Slider.SnapOnRelease
+                onValueChanged: {
+                    textMicrophoneVolume.text = value + " %"
+                    mixer.microphoneVolume = value
+                }
+            }
+        }
+    }
 }
diff --git a/app/app.pro b/app/app.pro
index a33fc0d..239dc8f 100644
--- a/app/app.pro
+++ b/app/app.pro
@@ -1,13 +1,15 @@
 TARGET = mixer
-QT = quickcontrols2
+QT = quickcontrols2 websockets core
 
 HEADERS += \
-    pacontrolmodel.h \
-    paclient.h
+    mixer.h \
+    qafbwsmsg.h \
+    qafbwsclient.h
 
 SOURCES = main.cpp \
-    pacontrolmodel.cpp \
-    paclient.cpp
+    mixer.cpp \
+    qafbwsclient.cpp \
+    qafbwsmsg.cpp
 
 CONFIG += link_pkgconfig
 PKGCONFIG += libhomescreen qlibwindowmanager libpulse
diff --git a/app/main.cpp b/app/main.cpp
index bfce498..a0a5667 100644
--- a/app/main.cpp
+++ b/app/main.cpp
@@ -15,9 +15,6 @@
  * limitations under the License.
  */
 
-#include "paclient.h"
-#include "pacontrolmodel.h"
-
 #include <QtCore/QDebug>
 #include <QtCore/QCommandLineParser>
 #include <QtCore/QUrlQuery>
@@ -34,6 +31,7 @@
 #include <QQuickWindow>
 #include <libhomescreen.hpp>
 #include <qlibwindowmanager.h>
+#include "mixer.h"
 
 int main(int argc, char *argv[])
 {
@@ -51,14 +49,7 @@ int main(int argc, char *argv[])
 	parser.process(app);
 	QStringList positionalArguments = parser.positionalArguments();
 
-	// Fire up PA client QThread
-	QThread* pat = new QThread;
-	PaClient* client = new PaClient();
-	client->moveToThread(pat);
-	pat->start();
-
-	// Register the PA Control Model
-	qmlRegisterType<PaControlModel>("PaControlModel", 1, 0, "PaControlModel");
+    qmlRegisterType<Mixer>("Mixer", 1, 0, "Mixer");
 
 	QQmlApplicationEngine engine;
 	if (positionalArguments.length() == 2) {
@@ -88,7 +79,7 @@ int main(int argc, char *argv[])
 			exit(EXIT_FAILURE);
 		}
 	        // Create an event callbnewack against an event type. Here a lambda is called when SyncDraw event occurs
-        	qwm->set_event_handler(QLibWindowmanager::Event_SyncDraw, [qwm, myname](json_object *object) {
+            qwm->set_event_handler(QLibWindowmanager::Event_SyncDraw, [qwm, myname](json_object*) {
 				fprintf(stderr, "Surface got syncDraw!\n");
 				qwm->endDraw(myname);
 			});
@@ -116,17 +107,6 @@ int main(int argc, char *argv[])
 
 		QQuickWindow *window = qobject_cast<QQuickWindow *>(mobjs.first());
 		QObject::connect(window, SIGNAL(frameSwapped()), qwm, SLOT(slotActivateSurface()));
-
-		PaControlModel *pacm = mobjs.first()->findChild<PaControlModel *>("pacm");
-		QObject::connect(client, SIGNAL(controlAdded(int, QString, QString, int, int, const char *, int)),
-				 pacm, SLOT(addOneControl(int, QString, QString, int, int, const char *, int)));
-		QObject::connect(client, SIGNAL(volumeExternallyChanged(uint32_t, uint32_t, uint32_t, uint32_t)),
-				 pacm, SLOT(changeExternalVolume(uint32_t, uint32_t, uint32_t, uint32_t)));
-		QObject::connect(pacm, SIGNAL(volumeChanged(uint32_t, uint32_t, uint32_t, uint32_t)),
-				 client, SLOT(setVolume(uint32_t, uint32_t, uint32_t, uint32_t)));
-
-		// Initalize PA client
-		client->init();
 	}
 	return app.exec();
 }
diff --git a/app/mixer.cpp b/app/mixer.cpp
new file mode 100644
index 0000000..8c2d2af
--- /dev/null
+++ b/app/mixer.cpp
@@ -0,0 +1,209 @@
+#include <QJsonArray>
+#include <QJsonObject>
+#include <QtDebug>
+#include "mixer.h"
+
+Mixer::Mixer(QObject* parent)
+    : QObject(parent)
+    , m_masterVolume{0}
+    , m_pcmVolume{0}
+    , m_microphoneVolume{0}
+{
+    connect(&m_client, SIGNAL(connected()), this, SLOT(onClientConnected()));
+}
+
+QVariantList Mixer::hals() const
+{
+    return m_hallist;
+}
+
+int Mixer::masterVolume() const
+{
+    return m_masterVolume;
+}
+
+int Mixer::pcmVolume() const
+{
+    return m_pcmVolume;
+}
+
+int Mixer::microphoneVolume() const
+{
+    return m_microphoneVolume;
+}
+
+void Mixer::setMasterVolume(int v)
+{
+    qDebug() << "Mixer::setMasterVolume(" << v << ")";
+    if (v != m_masterVolume)
+    {
+        m_masterVolumePending = v;
+        QJsonObject arg;
+        arg["label"] = "Master_Playback_Volume";
+        arg["val"] = static_cast<int>(v);
+        m_setMasterVolume = m_client.call(m_activeHal, "ctlset", arg);
+        connect(m_setMasterVolume.data(), SIGNAL(closed()), this, SLOT(onSetMasterVolume()));
+    }
+}
+
+void Mixer::setPcmVolume(int v)
+{
+    qDebug() << "Mixer::setPcmVolume(" << v << ")";
+    if (v != m_pcmVolume)
+    {
+        m_pcmVolumePending = v;
+        QJsonObject arg;
+        arg["label"] = "PCM_Playback_Volume";
+        arg["val"] = static_cast<int>(v);
+        m_setPcmVolume = m_client.call(m_activeHal, "ctlset", arg);
+        connect(m_setPcmVolume.data(), SIGNAL(closed()), this, SLOT(onSetPcmVolume()));
+    }
+}
+
+void Mixer::setMicrophoneVolume(int v)
+{
+    qDebug() << "Mixer::setMicrophoneVolume(" << v << ")";
+    if (v != m_microphoneVolume)
+    {
+        m_microphoneVolumePending = v;
+        QJsonObject arg;
+        arg["label"] = "Capture_Volume";
+        arg["val"] = static_cast<int>(v);
+        m_setMicrophoneVolume = m_client.call(m_activeHal, "ctlset", arg);
+        connect(m_setMicrophoneVolume.data(), SIGNAL(closed()), this, SLOT(onSetMicrophoneVolume()));
+    }
+}
+
+QString Mixer::activeHal() const
+{
+    return m_activeHal;
+}
+
+void Mixer::setActiveHal(QString h)
+{
+    if (h != m_activeHal)
+    {
+        m_activeHal = h;
+        qDebug() << "Mixer::setActiveHal: " << h;
+        // Get volumes for this card
+
+        QJsonObject arg;
+
+        arg["label"] = "Master_Playback_Volume";
+        m_getMasterVolume = m_client.call(m_activeHal, "ctlget", arg);
+        connect(m_getMasterVolume.data(), SIGNAL(closed()), this, SLOT(onGetMasterVolume()));
+
+        arg["label"] = "PCM_Playback_Volume";
+        m_getPcmVolume = m_client.call(m_activeHal, "ctlget", arg);
+        connect(m_getPcmVolume.data(), SIGNAL(closed()), this, SLOT(onGetPcmVolume()));
+
+        arg["label"] = "Capture_Volume";
+        m_getMicrophoneVolume = m_client.call(m_activeHal, "ctlget", arg);
+        connect(m_getMicrophoneVolume.data(), SIGNAL(closed()), this, SLOT(onGetMicrophoneVolume()));
+
+        emit activeHalChanged();
+    }
+}
+
+void Mixer::open(const QUrl &url)
+{
+    m_client.open(url);
+}
+
+void Mixer::onClientConnected()
+{
+    // Call HAL to populate list
+    m_alsacoreHallist = m_client.call("alsacore", "hallist");
+    connect(m_alsacoreHallist.data(), SIGNAL(closed()), this, SLOT(onHalListClosed()));
+}
+
+void Mixer::onHalListClosed()
+{
+    qDebug() << "Mixer::onHalListClosed";
+    if(m_alsacoreHallist->messageType() == AfMsgType::RetOk)
+    {
+        m_hallist.clear();
+
+        QJsonArray cards = m_alsacoreHallist->value().toObject()["response"].toArray();
+        qDebug() << "Mixer::onHalListClosed - founds: " << cards;
+        foreach (const QJsonValue& card, cards)
+        {
+            QJsonObject c = card.toObject();
+            QVariant v(c["api"].toString());
+            m_hallist.append(v);
+            qDebug() << "Mixer::onHalListClosed - added this HAL: " << v;
+        }
+
+        m_alsacoreHallist.clear();
+
+        setActiveHal(m_hallist[0].toString());
+
+        emit halsChanged();
+    }
+}
+
+void Mixer::onGetMasterVolume()
+{
+    qDebug() << "Mixer::onGetMasterVolume()";
+    disconnect(m_getMasterVolume.data(), SIGNAL(closed()), this, SLOT(onGetMasterVolume()));
+    if (m_getMasterVolume->messageType() == AfMsgType::RetOk && m_getMasterVolume->value().isObject())
+    {
+        setMasterVolume(m_getMasterVolume->value().toObject()["response"].toObject()["val"].toArray()[0].toInt());
+    }
+}
+
+void Mixer::onGetPcmVolume()
+{
+    qDebug() << "Mixer::onGetPcmVolume()";
+    disconnect(m_getPcmVolume.data(), SIGNAL(closed()), this, SLOT(onGetPcmVolume()));
+    if (m_getPcmVolume->messageType() == AfMsgType::RetOk && m_getPcmVolume->value().isObject())
+    {
+        setPcmVolume(m_getPcmVolume->value().toObject()["response"].toObject()["val"].toArray()[0].toInt());
+    }
+}
+
+void Mixer::onGetMicrophoneVolume()
+{
+    qDebug() << "Mixer::onGetMicrophoneVolume()";
+    disconnect(m_getMicrophoneVolume.data(), SIGNAL(closed()), this, SLOT(onGetMicrophoneVolume()));
+    if (m_getMicrophoneVolume->messageType() == AfMsgType::RetOk && m_getMicrophoneVolume->value().isObject())
+    {
+        setMicrophoneVolume(m_getMicrophoneVolume->value().toObject()["response"].toObject()["val"].toArray()[0].toInt());
+    }
+}
+
+void Mixer::onSetMasterVolume()
+{
+    qDebug() << "Mixer::onSetMasterVolume()";
+    disconnect(m_setMasterVolume.data(), SIGNAL(closed()), this, SLOT(onSetMasterVolume()));
+    if (m_setMasterVolume->messageType() == AfMsgType::RetOk && m_setMasterVolume->value().isObject())
+    {
+        m_masterVolume = m_masterVolumePending;
+        emit masterVolumeChanged();
+    }
+}
+
+void Mixer::onSetPcmVolume()
+{
+    qDebug() << "Mixer::onSetPcmVolume()";
+    disconnect(m_setPcmVolume.data(), SIGNAL(closed()), this, SLOT(onSetPcmVolume()));
+    if (m_setPcmVolume->messageType() == AfMsgType::RetOk && m_setPcmVolume->value().isObject())
+    {
+        m_pcmVolume = m_pcmVolumePending;
+        emit pcmVolumeChanged();
+    }
+}
+
+void Mixer::onSetMicrophoneVolume()
+{
+    qDebug() << "Mixer::onSetMicrophoneVolume()";
+    disconnect(m_setMicrophoneVolume.data(), SIGNAL(closed()), this, SLOT(onSetMicrophoneVolume()));
+    if (m_setMicrophoneVolume->messageType() == AfMsgType::RetOk && m_setMicrophoneVolume->value().isObject())
+    {
+        m_microphoneVolume = m_microphoneVolumePending;
+        qDebug() << "Mixer::onSetMicrophoneVolume() - ";
+        emit microphoneVolumeChanged();
+    }
+}
+
+
diff --git a/app/mixer.h b/app/mixer.h
new file mode 100644
index 0000000..2c25562
--- /dev/null
+++ b/app/mixer.h
@@ -0,0 +1,74 @@
+#ifndef MIXER_H
+#define MIXER_H
+
+#include <QObject>
+#include <QSharedPointer>
+#include <QVariantList>
+#include "qafbwsclient.h"
+#include "qafbwsmsg.h"
+
+class Mixer
+    : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QVariantList hals READ hals NOTIFY halsChanged)
+    Q_PROPERTY(QString activeHal READ activeHal WRITE setActiveHal NOTIFY activeHalChanged)
+
+    Q_PROPERTY(int masterVolume READ masterVolume WRITE setMasterVolume NOTIFY masterVolumeChanged)
+    Q_PROPERTY(int pcmVolume READ pcmVolume WRITE setPcmVolume NOTIFY pcmVolumeChanged)
+    Q_PROPERTY(int microphoneVolume READ microphoneVolume WRITE setMicrophoneVolume NOTIFY microphoneVolumeChanged)
+
+public:
+    explicit Mixer(QObject* parent = nullptr);
+    Mixer(const Mixer&) = delete;
+
+    Q_INVOKABLE void open(const QUrl& url);
+    Q_INVOKABLE QVariantList hals() const;
+    Q_INVOKABLE QString activeHal() const;
+    Q_INVOKABLE void setActiveHal(QString h);
+
+    Q_INVOKABLE int masterVolume() const;
+    Q_INVOKABLE int pcmVolume() const;
+    Q_INVOKABLE int microphoneVolume() const;
+
+    Q_INVOKABLE void setMasterVolume(int v);
+    Q_INVOKABLE void setPcmVolume(int v);
+    Q_INVOKABLE void setMicrophoneVolume(int v);
+
+signals:
+    void halsChanged();
+    void activeHalChanged();
+    void masterVolumeChanged();
+    void pcmVolumeChanged();
+    void microphoneVolumeChanged();
+
+private slots:
+    void onClientConnected();
+    void onHalListClosed();
+    void onGetMasterVolume();
+    void onGetPcmVolume();
+    void onGetMicrophoneVolume();
+    void onSetMasterVolume();
+    void onSetPcmVolume();
+    void onSetMicrophoneVolume();
+
+private:
+    int m_masterVolume;
+    int m_pcmVolume;
+    int m_microphoneVolume;
+    int m_masterVolumePending;
+    int m_pcmVolumePending;
+    int m_microphoneVolumePending;
+    QAfbWsClient m_client;
+    QVariantList m_hallist;
+    QString m_activeHal;
+    QSharedPointer<QAfbWsMsg> m_alsacoreHallist;
+    QSharedPointer<QAfbWsMsg> m_getMasterVolume;
+    QSharedPointer<QAfbWsMsg> m_getPcmVolume;
+    QSharedPointer<QAfbWsMsg> m_getMicrophoneVolume;
+    QSharedPointer<QAfbWsMsg> m_setMasterVolume;
+    QSharedPointer<QAfbWsMsg> m_setPcmVolume;
+    QSharedPointer<QAfbWsMsg> m_setMicrophoneVolume;
+};
+
+#endif // MIXER_H
diff --git a/app/paclient.cpp b/app/paclient.cpp
deleted file mode 100644
index bd53cde..0000000
--- a/app/paclient.cpp
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- * Copyright (C) 2016,2017 Konsulko Group
- *
- * 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.
- */
-
-#include "paclient.h"
-
-#include <QtCore/QDebug>
-
-PaClient::PaClient()
-	: m_init(false), m_ml(nullptr), m_mlapi(nullptr), m_ctx(nullptr)
-{
-}
-
-PaClient::~PaClient()
-{
-	if (m_init)
-		close();
-}
-
-void PaClient::close()
-{
-	if (!m_init) return;
-	pa_threaded_mainloop_stop(m_ml);
-	pa_threaded_mainloop_free(m_ml);
-	m_init = false;
-}
-
-static void set_sink_volume_cb(pa_context *c, int success, void *data)
-{
-	Q_UNUSED(data);
-
-	if (!success)
-		qWarning() << "PaClient: set sink volume: " <<
-			pa_strerror(pa_context_errno(c));
-}
-
-static void set_source_volume_cb(pa_context *c, int success, void *data)
-{
-	Q_UNUSED(data);
-
-	if (!success)
-		qWarning() << "PaClient: set source volume: " <<
-			pa_strerror(pa_context_errno(c));
-}
-
-void PaClient::setVolume(uint32_t type, uint32_t index, uint32_t channel, uint32_t volume)
-{
-	pa_operation *o;
-	pa_context *c = context();
-	pa_cvolume *cvolume = NULL;
-
-	if (type == C_SINK) {
-		cvolume = m_sink_states.value(index);
-		cvolume->values[channel] = volume;
-		if (!(o = pa_context_set_sink_volume_by_index(c, index, cvolume, set_sink_volume_cb, NULL))) {
-			qWarning() << "PaClient: set sink #" << index <<
-				" channel #" << channel <<
-				" volume: " << pa_strerror(pa_context_errno(c));
-			return;
-		}
-		pa_operation_unref(o);
-	} else if (type == C_SOURCE) {
-		cvolume = m_source_states.value(index);
-		cvolume->values[channel] = volume;
-		if (!(o = pa_context_set_source_volume_by_index(c, index, cvolume, set_source_volume_cb, NULL))) {
-			qWarning() << "PaClient: set source #" << index <<
-				" channel #" << channel <<
-				" volume: " << pa_strerror(pa_context_errno(c));
-			return;
-		}
-		pa_operation_unref(o);
-	}
-}
-
-void get_source_list_cb(pa_context *c,
-		const pa_source_info *i,
-		int eol,
-		void *data)
-{
-	int chan;
-
-	PaClient *self = reinterpret_cast<PaClient*>(data);
-
-	if (eol < 0) {
-		qWarning() << "PaClient: get source list: " <<
-			pa_strerror(pa_context_errno(c));
-
-		self->close();
-		return;
-	}
-
-	if (!eol) {
-		self->addOneControlState(C_SOURCE, i->index, &i->volume);
-		for (chan = 0; chan < i->channel_map.channels; chan++) {
-			// NOTE: hide input control
-			if (QString(i->name).endsWith("monitor"))
-				continue;
-
-			emit self->controlAdded(i->index, QString(i->name), QString(i->description),
-						C_SOURCE, chan, channel_position_string[i->channel_map.map[chan]],
-						i->volume.values[chan]);
-		}
-	}
-}
-
-void get_sink_list_cb(pa_context *c,
-		const pa_sink_info *i,
-		int eol,
-		void *data)
-{
-	PaClient *self = reinterpret_cast<PaClient*>(data);
-	int chan;
-
-	if(eol < 0) {
-		qWarning() << "PaClient: get sink list: " <<
-			pa_strerror(pa_context_errno(c));
-		self->close();
-		return;
-	}
-
-	if(!eol) {
-		self->addOneControlState(C_SINK, i->index, &i->volume);
-		for (chan = 0; chan < i->channel_map.channels; chan++) {
-			emit self->controlAdded(i->index, QString(i->name), QString(i->description),
-						C_SINK, chan, channel_position_string[i->channel_map.map[chan]],
-						i->volume.values[chan]);
-		}
-	}
-}
-
-void get_sink_info_change_cb(pa_context *c,
-			     const pa_sink_info *i,
-			     int eol,
-			     void *data)
-{
-	Q_UNUSED(c);
-	Q_ASSERT(i);
-	Q_ASSERT(data);
-
-	if (eol) return;
-
-	for (int chan = 0; chan < i->channel_map.channels; chan++) {
-		PaClient *self = reinterpret_cast<PaClient*>(data);
-		QHash<int, pa_cvolume *> states = self->sink_states();
-		pa_cvolume *cvolume = states.value(i->index);
-		// Check each channel for volume change
-		if (cvolume->values[chan] != i->volume.values[chan]) {
-			// On change, update cache and signal
-			cvolume->values[chan] = i->volume.values[chan];
-			emit self->volumeExternallyChanged(C_SINK, i->index, chan, i->volume.values[chan]);
-		}
-	}
-}
-
-void get_source_info_change_cb(pa_context *c,
-			       const pa_source_info *i,
-			       int eol,
-			       void *data)
-{
-	Q_UNUSED(c);
-	Q_ASSERT(i);
-	Q_ASSERT(data);
-
-	if (eol) return;
-
-	for (int chan = 0; chan < i->channel_map.channels; chan++) {
-		PaClient *self = reinterpret_cast<PaClient*>(data);
-		QHash<int, pa_cvolume *> states = self->source_states();
-		pa_cvolume *cvolume = states.value(i->index);
-		// Check each channel for volume change
-		if (cvolume->values[chan] != i->volume.values[chan]) {
-			// On change, update cache and signal
-			cvolume->values[chan] = i->volume.values[chan];
-			emit self->volumeExternallyChanged(C_SOURCE, i->index, chan, i->volume.values[chan]);
-		}
-	}
-}
-
-
-void subscribe_cb(pa_context *c,
-		  pa_subscription_event_type_t type,
-		  uint32_t index,
-		  void *data)
-{
-	pa_operation *o;
-
-	if ((type & PA_SUBSCRIPTION_EVENT_TYPE_MASK) != PA_SUBSCRIPTION_EVENT_CHANGE) {
-		qWarning("PaClient: unhandled subscribe event operation");
-		return;
-	}
-
-	switch (type & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) {
-		case PA_SUBSCRIPTION_EVENT_SINK:
-			if (!(o = pa_context_get_sink_info_by_index(c, index, get_sink_info_change_cb, data))) {
-				qWarning() << "PaClient: get sink info by index: " <<
-					pa_strerror(pa_context_errno(c));
-				return;
-			}
-			break;
-		case PA_SUBSCRIPTION_EVENT_SOURCE:
-			if (!(o = pa_context_get_source_info_by_index(c, index, get_source_info_change_cb, data))) {
-				qWarning() << "PaClient: get source info by index: " <<
-					pa_strerror(pa_context_errno(c));
-				return;
-			}
-			break;
-		default:
-			qWarning("PaClient: unhandled subscribe event facility");
-	}
-}
-
-void context_state_cb(pa_context *c, void *data)
-{
-	pa_operation *o;
-	PaClient *self = reinterpret_cast<PaClient*>(data);
-
-	switch (pa_context_get_state(c)) {
-		case PA_CONTEXT_CONNECTING:
-		case PA_CONTEXT_AUTHORIZING:
-		case PA_CONTEXT_SETTING_NAME:
-			break;
-		case PA_CONTEXT_READY:
-			// Fetch the controls of interest
-			if (!(o = pa_context_get_source_info_list(c, get_source_list_cb, data))) {
-				qWarning() << "PaClient: get source info list: " <<
-					pa_strerror(pa_context_errno(c));
-				return;
-			}
-			pa_operation_unref(o);
-			if (!(o = pa_context_get_sink_info_list(c, &get_sink_list_cb, data))) {
-				qWarning() << "PaClient: get sink info list: " <<
-					pa_strerror(pa_context_errno(c));
-				return;
-			}
-			pa_operation_unref(o);
-			pa_context_set_subscribe_callback(c, subscribe_cb, data);
-			if (!(o = pa_context_subscribe(c, (pa_subscription_mask_t)(PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE), NULL, NULL))) {
-				qWarning() << "PaClient: subscribe: " <<
-					pa_strerror(pa_context_errno(c));
-				return;
-			}
-			break;
-		case PA_CONTEXT_TERMINATED:
-			self->close();
-			break;
-
-		case PA_CONTEXT_FAILED:
-		default:
-			qCritical() << "PaClient: connection failed: " <<
-				pa_strerror(pa_context_errno(c));
-			self->close();
-			break;
-	}
-}
-
-void PaClient::init()
-{
-	m_ml = pa_threaded_mainloop_new();
-	if (!m_ml) {
-		qCritical("PaClient: failed to create mainloop");
-		return;
-	}
-
-	pa_threaded_mainloop_set_name(m_ml, "PaClient mainloop");
-
-	m_mlapi = pa_threaded_mainloop_get_api(m_ml);
-
-	lock();
-
-	m_ctx = pa_context_new(m_mlapi, "Mixer");
-	if (!m_ctx) {
-		qCritical("PaClient: failed to create context");
-		pa_threaded_mainloop_free(m_ml);
-		return;
-	}
-	pa_context_set_state_callback(m_ctx, context_state_cb, this);
-
-	if (pa_context_connect(m_ctx, 0, (pa_context_flags_t)0, 0) < 0) {
-		qCritical("PaClient: failed to connect");
-		pa_context_unref(m_ctx);
-		pa_threaded_mainloop_free(m_ml);
-		return;
-	}
-
-	if (pa_threaded_mainloop_start(m_ml) != 0) {
-		qCritical("PaClient: failed to start mainloop");
-		pa_context_unref(m_ctx);
-		pa_threaded_mainloop_free(m_ml);
-		return;
-	}
-
-	unlock();
-
-	m_init = true;
-}
-
-void PaClient::addOneControlState(int type, int index, const pa_cvolume *cvolume)
-{
-	pa_cvolume *cvolume_new = new pa_cvolume;
-	cvolume_new->channels = cvolume->channels;
-	for (int i = 0; i < cvolume->channels; i++)
-		cvolume_new->values[i] = cvolume->values[i];
-	if (type == C_SINK)
-		m_sink_states.insert(index, cvolume_new);
-	else if (type == C_SOURCE)
-		m_source_states.insert(index, cvolume_new);
-}
-
-QHash<int, pa_cvolume *> PaClient::sink_states(void)
-{
-	return m_sink_states;
-}
-
-QHash<int, pa_cvolume *> PaClient::source_states(void)
-{
-	return m_source_states;
-}
diff --git a/app/paclient.h b/app/paclient.h
deleted file mode 100644
index 73137f2..0000000
--- a/app/paclient.h
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 2016,2017 Konsulko Group
- *
- * 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.
- */
-
-#include <pulse/pulseaudio.h>
-
-#include <QtCore/QHash>
-#include <QtCore/QObject>
-
-const char * const channel_position_string[] =
-{
-	"Mono",
-	"Front Left",
-	"Front Right",
-	"Center",
-	"Rear Center",
-	"Rear Left",
-	"Rear Right",
-	"LFE",
-	"Left Center",
-	"Right Center",
-	"Side Left",
-	"Side Right",
-};
-
-enum control_type
-{
-	C_SOURCE,
-	C_SINK
-};
-
-typedef struct
-{
-	uint32_t type;
-	uint32_t index;
-	pa_cvolume cvolume;
-} CState;
-
-class PaClient : public QObject
-{
-	Q_OBJECT
-	public:
-		PaClient();
-		~PaClient();
-
-		void init();
-		void close();
-
- 		inline pa_context *context() const
-		{
-			return m_ctx;
-		}
-
-		inline void lock()
-		{
-			pa_threaded_mainloop_lock(m_ml);
-		}
-
-		inline void unlock()
-		{
-			pa_threaded_mainloop_unlock(m_ml);
-		}
-
-		void addOneControlState(int type, int index, const pa_cvolume *cvolume);
-
-		QHash<int, pa_cvolume *> sink_states();
-		QHash<int, pa_cvolume *> source_states();
-
-	public slots:
-		void setVolume(uint32_t type, uint32_t index, uint32_t channel, uint32_t volume);
-
-	signals:
-		void controlAdded(int cindex, QString name, QString desc, int type, int channel, const char *cdesc, int volume);
-		void volumeExternallyChanged(uint32_t type, uint32_t cindex, uint32_t channel, uint32_t volume);
-
-	private:
-		bool m_init;
-		pa_threaded_mainloop *m_ml;
-		pa_mainloop_api *m_mlapi;
-		pa_context *m_ctx;
-		QHash<int, pa_cvolume *> m_sink_states;
-		QHash<int, pa_cvolume *> m_source_states;
-
-	public slots:
-};
diff --git a/app/pacontrolmodel.cpp b/app/pacontrolmodel.cpp
deleted file mode 100644
index 9489052..0000000
--- a/app/pacontrolmodel.cpp
+++ /dev/null
@@ -1,208 +0,0 @@
-/*
- * Copyright (C) 2016,2017 Konsulko Group
- *
- * 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.
- */
-
-#include "pacontrolmodel.h"
-
-PaControl::PaControl(const quint32 &cindex, const QString &name, const QString &desc, const quint32 &type, const quint32 &channel, const QString &cdesc, const quint32 &volume)
-	: m_cindex(cindex), m_name(name), m_desc(desc), m_type(type), m_channel(channel), m_cdesc(cdesc), m_volume(volume)
-{
-}
-
-quint32 PaControl::cindex() const
-{
-	return m_cindex;
-}
-
-QString PaControl::name() const
-{
-	QStringList list = m_name.split(".");
-
-	return list.at(1);
-}
-
-QString PaControl::desc() const
-{
-	return m_desc;
-}
-
-quint32 PaControl::type() const
-{
-	return m_type;
-}
-
-quint32 PaControl::channel() const
-{
-	return m_channel;
-}
-
-QString PaControl::cdesc() const
-{
-	return m_cdesc;
-}
-
-
-quint32 PaControl::volume() const
-{
-	return m_volume;
-}
-
-// FIXME: Not all of these should be editable roles
-void PaControl::setCIndex(const QVariant &cindex)
-{
-	m_cindex = cindex.toUInt();
-}
-
-void PaControl::setName(const QVariant &name)
-{
-	m_name = name.toString();
-}
-
-void PaControl::setDesc(const QVariant &desc)
-{
-	m_desc = desc.toString();
-}
-
-void PaControl::setType(const QVariant &type)
-{
-	m_type = type.toUInt();
-}
-
-void PaControl::setChannel(const QVariant &channel)
-{
-	m_channel = channel.toUInt();
-}
-
-void PaControl::setCDesc(const QVariant &cdesc)
-{
-	m_cdesc = cdesc.toString();
-}
-
-void PaControl::setVolume(PaControlModel *pacm, const QVariant &volume)
-{
-	if (volume != m_volume) {
-		m_volume = volume.toUInt();
-		if (pacm)
-			emit pacm->volumeChanged(type(), cindex(), channel(), m_volume);
-	}
-}
-
-PaControlModel::PaControlModel(QObject *parent)
-	: QAbstractListModel(parent)
-{
-}
-
-void PaControlModel::addControl(const PaControl &control)
-{
-	beginInsertRows(QModelIndex(), rowCount(), rowCount());
-	m_controls << control;
-	endInsertRows();
-}
-
-void PaControlModel::addOneControl(int cindex, QString name, QString desc, int type, int channel, const char *cdesc, int volume)
-{
-	addControl(PaControl(cindex, name, desc, type, channel, cdesc, volume));
-}
-
-void PaControlModel::changeExternalVolume(uint32_t type, uint32_t cindex, uint32_t channel, uint32_t volume)
-{
-	QList<PaControl>::iterator i;
-	int row;
-
-	for (i = m_controls.begin(), row = 0; i < m_controls.end(); ++i, ++row) {
-		if ((i->type() == type) &&
-		    (i->cindex() == cindex) &&
-		    (i->channel() == channel)) {
-			break;
-		}
-	}
-
-	i->setVolume(NULL, QVariant(volume));
-	QModelIndex qmindex = index(row);
-	QVector<int> roles;
-	roles.push_back(VolumeRole);
-	emit dataChanged(qmindex, qmindex, roles);
-}
-
-int PaControlModel::rowCount(const QModelIndex & parent) const {
-	Q_UNUSED(parent);
-	return m_controls.count();
-}
-
-bool PaControlModel::setData(const QModelIndex &index, const QVariant &value, int role) {
-	if (index.row() < 0 || index.row() >= m_controls.count())
-		return false;
-	PaControl &control = m_controls[index.row()];
-	if (role == CIndexRole)
-		control.setCIndex(value);
-	else if (role == NameRole)
-		control.setName(value);
-	else if (role == DescRole)
-		control.setDesc(value);
-	else if (role == TypeRole)
-		control.setType(value);
-	else if (role == ChannelRole)
-		control.setChannel(value);
-	else if (role == CDescRole)
-		control.setCDesc(value);
-	else if (role == VolumeRole)
-		control.setVolume(this, value);
-	QVector<int> roles;
-	roles.push_back(role);
-	emit dataChanged(index, index, roles);
-	return true;
-}
-
-QVariant PaControlModel::data(const QModelIndex & index, int role) const {
-	if (index.row() < 0 || index.row() >= m_controls.count())
-		return QVariant();
-
-	const PaControl &control = m_controls[index.row()];
-	if (role == CIndexRole)
-		return control.cindex();
-	else if (role == NameRole)
-		return control.name();
-	else if (role == DescRole)
-		return control.desc();
-	else if (role == TypeRole)
-		return control.type();
-	else if (role == ChannelRole)
-		return control.channel();
-	else if (role == CDescRole)
-		return control.cdesc();
-	else if (role == VolumeRole)
-		return control.volume();
-	return QVariant();
-}
-
-Qt::ItemFlags PaControlModel::flags(const QModelIndex &index) const
-{
-	if (!index.isValid())
-		return Qt::ItemIsEnabled;
-
-	return QAbstractListModel::flags(index) | Qt::ItemIsEditable;
-}
-
-QHash<int, QByteArray> PaControlModel::roleNames() const {
-	QHash<int, QByteArray> roles;
-	roles[CIndexRole] = "cindex";
-	roles[NameRole] = "name";
-	roles[DescRole] = "desc";
-	roles[TypeRole] = "type";
-	roles[ChannelRole] = "channel";
-	roles[CDescRole] = "cdesc";
-	roles[VolumeRole] = "volume";
-	return roles;
-}
diff --git a/app/pacontrolmodel.h b/app/pacontrolmodel.h
deleted file mode 100644
index 81eb70b..0000000
--- a/app/pacontrolmodel.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * Copyright (C) 2016,2017 Konsulko Group
- *
- * 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.
- */
-
-#include <pulse/pulseaudio.h>
-
-#include <QtCore/QAbstractListModel>
-#include <QtCore/QList>
-
-class PaControlModel;
-
-class PaControl
-{
-	public:
-		PaControl(const quint32 &index, const QString &name, const QString &desc, const quint32 &type, const quint32 &channel, const QString &cdesc, const quint32 &volume);
-
-		quint32 cindex() const;
-		QString name() const;
-		QString desc() const;
-		quint32 type() const;
-		quint32 channel() const;
-		QString cdesc() const;
-		quint32 volume() const;
-		void setCIndex(const QVariant&);
-		void setName(const QVariant&);
-		void setDesc(const QVariant&);
-		void setType(const QVariant&);
-		void setChannel(const QVariant&);
-		void setCDesc(const QVariant&);
-		void setVolume(PaControlModel *, const QVariant&);
-
-	private:
-		quint32 m_cindex;
-		QString m_name;
-		QString m_desc;
-		quint32 m_type;
-		quint32 m_channel;
-		QString m_cdesc;
-		quint32 m_volume;
-};
-
-class PaControlModel : public QAbstractListModel
-{
-	Q_OBJECT
-	public:
-		enum PaControlRoles {
-			CIndexRole = Qt::UserRole + 1,
-			NameRole,
-			DescRole,
-			TypeRole,
-			ChannelRole,
-			CDescRole,
-			VolumeRole
-		};
-
-		PaControlModel(QObject *parent = 0);
-
-		void addControl(const PaControl &control);
-
-		int rowCount(const QModelIndex &parent = QModelIndex()) const;
-
-		QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
-
-		bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);
-
-		Qt::ItemFlags flags(const QModelIndex &index) const;
-
-	public slots:
-		void addOneControl(int cindex, QString name, QString desc, int type, int channel, const char *cdesc, int volume);
-		void changeExternalVolume(uint32_t type, uint32_t cindex, uint32_t chan, uint32_t volume);
-
-	signals:
-		void volumeChanged(uint32_t type, uint32_t index, uint32_t channel, uint32_t volume);
-
-	protected:
-		QHash<int, QByteArray> roleNames() const;
-	private:
-		QList<PaControl> m_controls;
-		pa_context *pa_ctx;
-};
diff --git a/app/qafbwsclient.cpp b/app/qafbwsclient.cpp
new file mode 100644
index 0000000..2816907
--- /dev/null
+++ b/app/qafbwsclient.cpp
@@ -0,0 +1,136 @@
+#include "qafbwsclient.h"
+#include "qafbwsmsg.h"
+#include <QJsonDocument>
+#include <QJsonArray>
+#include <QtDebug>
+
+QAfbWsClient::QAfbWsClient(QObject* parent)
+    : QObject{parent}
+    , m_nextCallId{0}
+{
+    connect(&m_socket, SIGNAL(connected()), this, SLOT(onSocketConnected()));
+    connect(&m_socket, SIGNAL(disconnected()), this, SLOT(onSocketDisconnected()));
+    connect(&m_socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(onSocketError(QAbstractSocket::SocketError)));
+}
+
+QUrl QAfbWsClient::url() const
+{
+    return m_socket.requestUrl();
+}
+
+QSharedPointer<QAfbWsMsg> QAfbWsClient::call(const QString& api, const QString& verb, const QJsonValue& args)
+{
+    while(m_calls.constFind(m_nextCallId) != m_calls.cend()) m_nextCallId++; // Make sure that callId is not currently used
+
+    qDebug() << "QAfbWsClient::call(" << api << ", " << verb << ", " << args << ")";
+    QJsonArray arr;
+    arr.append(static_cast<int>(AfMsgType::Call));
+    arr.append(m_nextCallId);
+    arr.append(api + "/" + verb);
+    arr.append(args);
+
+    QJsonDocument doc;
+    doc.setArray(arr);
+
+    QSharedPointer<QAfbWsMsg> msg(new QAfbWsMsg(m_nextCallId, api, verb));
+    m_calls[m_nextCallId] = msg;
+
+    // TODO: handle failure of sendTextMessage
+    m_socket.sendTextMessage(doc.toJson(QJsonDocument::Compact));
+    qDebug() << "m_socket.sendTextMessage(" << doc.toJson(QJsonDocument::Compact) << ")";
+
+    m_nextCallId++;
+
+    return msg;
+}
+
+void QAfbWsClient::onSocketConnected()
+{
+    qDebug() << "QAfbWsClient::onSocketConnected()";
+    connect(&m_socket, SIGNAL(textMessageReceived(QString)), this, SLOT(onSocketTextMessageReceived(QString)));
+    emit connected();
+}
+
+void QAfbWsClient::onSocketDisconnected()
+{
+    qDebug() << "QAfbWsClient::onSocketDisconnected()";
+    m_nextCallId = 0;
+    disconnect(&m_socket, SIGNAL(textMessageReceived(QString)), this, SLOT(onSocketTextMessageReceived(QString)));
+    emit disconnected();
+}
+
+void QAfbWsClient::onSocketError(QAbstractSocket::SocketError err)
+{
+    qDebug() << "QAfbWsClient::onSocketError(" << err << ")";
+    emit error(err, m_socket.errorString());
+}
+
+void QAfbWsClient::onSocketTextMessageReceived(QString msg)
+{
+    qDebug() << "QAfbWsClient::onSocketTextMessageReceived(" << msg << ")";
+
+    if (msg.size() == 0)
+    {
+        qCritical() << "QAfbWsClient::onSocketTextMessageReceived: received an empty message.";
+        return;
+    }
+
+    QJsonDocument doc = QJsonDocument::fromJson(msg.toUtf8());
+    if (doc.isEmpty() || doc.isNull() || !doc.isArray())
+    {
+        qCritical() << "QAfbWsClient::onSocketTextMessageReceived: received an invalid message.";
+        return;
+    }
+
+    QJsonArray arr = doc.array();
+    AfMsgType msgType = static_cast<AfMsgType>(arr[0].toInt());
+    int callId = arr[1].isString() ? arr[1].toString().toInt() : arr[1].toInt();
+    QString api;
+    QJsonValue value;
+
+    switch(msgType)
+    {
+    case AfMsgType::Call:
+        qCritical() << "QAfbWsClient::onSocketTextMessageReceived: Client received a call, which should not happen.";
+        break;
+
+    case AfMsgType::Event:
+        qDebug() << "QAfbWsClient::onSocketTextMessageReceived: Client received an event.";
+        // TODO: handle events
+        value = arr[3];
+        break;
+
+    case AfMsgType::RetOk:
+    case AfMsgType::RetErr:
+        {
+            value = arr[2];
+            QMap<int, QSharedPointer<QAfbWsMsg>>::const_iterator it = m_calls.find(callId);
+            if (it == m_calls.end())
+            {
+                qCritical() << "QAfbWsClient::onSocketTextMessageReceived: received a response to a not found query.";
+                return;
+            }
+
+            QSharedPointer<QAfbWsMsg> m = *it;
+            m_calls.remove(callId);
+            m->close(msgType, value);
+        }
+        break;
+
+    default:
+        qCritical() << "QAfbWsClient::onSocketTextMessageReceived: Client received an unsupported message.";
+        break;
+    }
+}
+
+void QAfbWsClient::open(const QUrl& url)
+{
+    qDebug() << "QAfbWsClient::open(" << url << ")";
+    m_socket.open(url);
+}
+
+void QAfbWsClient::close()
+{
+    qDebug() << "QAfbWsClient::close()";
+    m_socket.close();
+}
diff --git a/app/qafbwsclient.h b/app/qafbwsclient.h
new file mode 100644
index 0000000..2576ecb
--- /dev/null
+++ b/app/qafbwsclient.h
@@ -0,0 +1,50 @@
+#ifndef QAFBWSCLIENT_H
+#define QAFBWSCLIENT_H
+
+#include <QObject>
+#include <QMap>
+#include <QSharedPointer>
+#include <QWebSocket>
+#include <QJsonValue>
+
+enum class AfMsgType
+    : int
+{
+    Call = 2,
+    RetOk = 3,
+    RetErr = 4,
+    Event = 5
+};
+
+class QAfbWsMsg;
+
+class QAfbWsClient
+    : public QObject
+{
+    Q_OBJECT
+public:
+    explicit QAfbWsClient(QObject* parent = nullptr);
+
+    void open(const QUrl& url);
+    void close();
+    QUrl url() const;
+    QSharedPointer<QAfbWsMsg> call(const QString &api, const QString &verb, const QJsonValue &args = QJsonValue());
+
+signals:
+    void connected();
+    void disconnected();
+    void error(QAbstractSocket::SocketError err, QString errStr);
+
+private slots:
+    void onSocketConnected();
+    void onSocketDisconnected();
+    void onSocketError(QAbstractSocket::SocketError err);
+    void onSocketTextMessageReceived(QString msg);
+
+private:
+    int m_nextCallId;
+    QWebSocket m_socket;
+    QMap<int, QSharedPointer<QAfbWsMsg>> m_calls;
+};
+
+#endif // QAFBWSCLIENT_H
diff --git a/app/qafbwsmsg.cpp b/app/qafbwsmsg.cpp
new file mode 100644
index 0000000..3f07cb0
--- /dev/null
+++ b/app/qafbwsmsg.cpp
@@ -0,0 +1,44 @@
+#include "qafbwsmsg.h"
+
+QAfbWsMsg::QAfbWsMsg(int callId, const QString& api, const QString& verb, QObject* parent)
+    : QObject{parent}
+    , m_callId{callId}
+{
+    m_api = api;
+    m_verb = verb;
+}
+
+void QAfbWsMsg::close(AfMsgType type, const QJsonValue& result)
+{
+    m_type = type;
+    m_value = result;
+
+    qDebug() << "QAfbWsMsg::close: type=" << static_cast<int>(m_type) << ", api=" << m_api << ", verb=" << m_verb << ", value=" << m_value;
+
+    emit closed();
+}
+
+int QAfbWsMsg::callId() const
+{
+    return m_callId;
+}
+
+AfMsgType QAfbWsMsg::messageType() const
+{
+    return m_type;
+}
+
+QString QAfbWsMsg::api() const
+{
+    return m_api;
+}
+
+QString QAfbWsMsg::verb() const
+{
+    return m_verb;
+}
+
+QJsonValue QAfbWsMsg::value() const
+{
+    return m_value;
+}
diff --git a/app/qafbwsmsg.h b/app/qafbwsmsg.h
new file mode 100644
index 0000000..6acce59
--- /dev/null
+++ b/app/qafbwsmsg.h
@@ -0,0 +1,33 @@
+#ifndef QAFBWSMSG_H
+#define QAFBWSMSG_H
+
+#include <QObject>
+#include <QJsonValue>
+#include "qafbwsclient.h"
+
+class QAfbWsMsg
+    : public QObject
+{
+    Q_OBJECT
+public:
+    explicit QAfbWsMsg(int callId = 0, const QString& api = "", const QString& verb = "", QObject* parent = nullptr);
+    void close(AfMsgType type, const QJsonValue& result);
+
+    int callId() const;
+    AfMsgType messageType() const;
+    QString api() const;
+    QString verb() const;
+    QJsonValue value() const;
+
+signals:
+    void closed();
+
+private:
+    int m_callId;
+    AfMsgType m_type;
+    QString m_api;
+    QString m_verb;
+    QJsonValue m_value;
+};
+
+#endif // QAFBWSMSG_H
diff --git a/package/config.xml b/package/config.xml
index bee25a0..109ce5d 100644
--- a/package/config.xml
+++ b/package/config.xml
@@ -9,6 +9,8 @@
   <feature name="urn:AGL:widget:required-api">
     <param name="windowmanager" value="ws" />
     <param name="homescreen" value="ws" />
+    <param name="alsacore" value="ws" />
+    <param name="rsnddai0ak4613h" value="ws" />
   </feature>
   <feature name="urn:AGL:widget:required-permission">
     <param name="urn:AGL:permission::public:no-htdocs" value="required" />