BlackBerry/QNX: Implement audio recording with QAudioInput

Change-Id: I62cad152a7b7fd92905744439de838306dc7a558
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>

4 files changed, 593 insertions, 2 deletions

diff --git a/src/plugins/qnx/audio/audio.pro b/src/plugins/qnx/audio/audio.pro
index 3b67fbf17..c38b09b79 100644
--- a/src/plugins/qnx/audio/audio.pro
+++ b/src/plugins/qnx/audio/audio.pro
@@ -10,11 +10,13 @@ LIBS += -lasound
 
 HEADERS += qnxaudioplugin.h \
            qnxaudiodeviceinfo.h \
+           qnxaudioinput.h \
            qnxaudiooutput.h \
            qnxaudioutils.h
 
 SOURCES += qnxaudioplugin.cpp \
            qnxaudiodeviceinfo.cpp \
+           qnxaudioinput.cpp \
            qnxaudiooutput.cpp \
            qnxaudioutils.cpp
 
diff --git a/src/plugins/qnx/audio/qnxaudioinput.cpp b/src/plugins/qnx/audio/qnxaudioinput.cpp
new file mode 100644
index 000000000..eb8064598
--- /dev/null
+++ b/src/plugins/qnx/audio/qnxaudioinput.cpp
@@ -0,0 +1,447 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Research In Motion
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qnxaudioinput.h"
+
+#include "qnxaudioutils.h"
+
+#include <private/qaudiohelpers_p.h>
+
+#include <QDebug>
+
+QT_BEGIN_NAMESPACE
+
+QnxAudioInput::QnxAudioInput()
+    : m_audioSource(0)
+    , m_pcmHandle(0)
+    , m_pcmNotifier(0)
+    , m_error(QAudio::NoError)
+    , m_state(QAudio::StoppedState)
+    , m_bytesRead(0)
+    , m_elapsedTimeOffset(0)
+    , m_totalTimeValue(0)
+    , m_volume(qreal(1.0f))
+    , m_bytesAvailable(0)
+    , m_bufferSize(0)
+    , m_periodSize(0)
+    , m_intervalTime(1000)
+    , m_pullMode(true)
+{
+}
+
+QnxAudioInput::~QnxAudioInput()
+{
+    close();
+}
+
+void QnxAudioInput::start(QIODevice *device)
+{
+    if (m_state != QAudio::StoppedState)
+        close();
+
+    if (!m_pullMode && m_audioSource)
+        delete m_audioSource;
+
+    m_pullMode = true;
+    m_audioSource = device;
+
+    if (open()) {
+        setError(QAudio::NoError);
+        setState(QAudio::ActiveState);
+    } else {
+        setError(QAudio::OpenError);
+        setState(QAudio::StoppedState);
+    }
+}
+
+QIODevice *QnxAudioInput::start()
+{
+    if (m_state != QAudio::StoppedState)
+        close();
+
+    if (!m_pullMode && m_audioSource)
+        delete m_audioSource;
+
+    m_pullMode = false;
+    m_audioSource = new InputPrivate(this);
+    m_audioSource->open(QIODevice::ReadOnly | QIODevice::Unbuffered);
+
+    if (open()) {
+        setError(QAudio::NoError);
+        setState(QAudio::IdleState);
+    } else {
+        delete m_audioSource;
+        m_audioSource = 0;
+
+        setError(QAudio::OpenError);
+        setState(QAudio::StoppedState);
+    }
+
+    return m_audioSource;
+}
+
+void QnxAudioInput::stop()
+{
+    if (m_state == QAudio::StoppedState)
+        return;
+
+    setError(QAudio::NoError);
+    setState(QAudio::StoppedState);
+    close();
+}
+
+void QnxAudioInput::reset()
+{
+    stop();
+    m_bytesAvailable = 0;
+}
+
+void QnxAudioInput::suspend()
+{
+    if (m_pcmNotifier)
+        m_pcmNotifier->setEnabled(false);
+
+    setState(QAudio::SuspendedState);
+}
+
+void QnxAudioInput::resume()
+{
+    if (m_pcmNotifier)
+        m_pcmNotifier->setEnabled(true);
+
+    if (m_pullMode) {
+        setState(QAudio::ActiveState);
+    } else {
+        setState(QAudio::IdleState);
+    }
+}
+
+int QnxAudioInput::bytesReady() const
+{
+    return qMax(m_bytesAvailable, 0);
+}
+
+int QnxAudioInput::periodSize() const
+{
+    return m_periodSize;
+}
+
+void QnxAudioInput::setBufferSize(int bufferSize)
+{
+    m_bufferSize = bufferSize;
+}
+
+int QnxAudioInput::bufferSize() const
+{
+    return m_bufferSize;
+}
+
+void QnxAudioInput::setNotifyInterval(int milliSeconds)
+{
+    m_intervalTime = qMax(0, milliSeconds);
+}
+
+int QnxAudioInput::notifyInterval() const
+{
+    return m_intervalTime;
+}
+
+qint64 QnxAudioInput::processedUSecs() const
+{
+    return qint64(1000000) * m_format.framesForBytes(m_bytesRead) / m_format.sampleRate();
+}
+
+qint64 QnxAudioInput::elapsedUSecs() const
+{
+    if (m_state == QAudio::StoppedState)
+        return 0;
+
+    return m_clockStamp.elapsed() * 1000;
+}
+
+QAudio::Error QnxAudioInput::error() const
+{
+    return m_error;
+}
+
+QAudio::State QnxAudioInput::state() const
+{
+    return m_state;
+}
+
+void QnxAudioInput::setFormat(const QAudioFormat &format)
+{
+    if (m_state == QAudio::StoppedState)
+        m_format = format;
+}
+
+QAudioFormat QnxAudioInput::format() const
+{
+    return m_format;
+}
+
+void QnxAudioInput::setVolume(qreal volume)
+{
+    m_volume = qBound(qreal(0.0), volume, qreal(1.0));
+}
+
+qreal QnxAudioInput::volume() const
+{
+    return m_volume;
+}
+
+void QnxAudioInput::userFeed()
+{
+    if (m_state == QAudio::StoppedState || m_state == QAudio::SuspendedState)
+        return;
+
+    deviceReady();
+}
+
+bool QnxAudioInput::deviceReady()
+{
+    if (m_pullMode) {
+        // reads some audio data and writes it to QIODevice
+        read(0, 0);
+    } else {
+        m_bytesAvailable = m_periodSize;
+
+        // emits readyRead() so user will call read() on QIODevice to get some audio data
+        if (m_audioSource != 0) {
+            InputPrivate *input = qobject_cast<InputPrivate*>(m_audioSource);
+            input->trigger();
+        }
+    }
+
+    if (m_state != QAudio::ActiveState)
+        return true;
+
+    if (m_intervalTime && (m_timeStamp.elapsed() + m_elapsedTimeOffset) > m_intervalTime) {
+        emit notify();
+        m_elapsedTimeOffset = m_timeStamp.elapsed() + m_elapsedTimeOffset - m_intervalTime;
+        m_timeStamp.restart();
+    }
+
+    return true;
+}
+
+bool QnxAudioInput::open()
+{
+    if (!m_format.isValid() || m_format.sampleRate() <= 0) {
+        if (!m_format.isValid())
+            qWarning("QnxAudioInput: open error, invalid format.");
+        else
+            qWarning("QnxAudioInput: open error, invalid sample rate (%d).", m_format.sampleRate());
+
+        return false;
+    }
+
+    int errorCode = 0;
+
+    int card = 0;
+    int device = 0;
+    if ((errorCode = snd_pcm_open_preferred(&m_pcmHandle, &card, &device, SND_PCM_OPEN_CAPTURE)) < 0) {
+        qWarning("QnxAudioInput: open error, couldn't open card (0x%x)", -errorCode);
+        return false;
+    }
+
+    // Necessary so that bytesFree() which uses the "free" member of the status struct works
+    snd_pcm_plugin_set_disable(m_pcmHandle, PLUGIN_DISABLE_MMAP);
+
+    snd_pcm_channel_info_t info;
+    memset(&info, 0, sizeof(info));
+    info.channel = SND_PCM_CHANNEL_CAPTURE;
+    if ((errorCode = snd_pcm_plugin_info(m_pcmHandle, &info)) < 0) {
+        qWarning("QnxAudioInput: open error, couldn't get channel info (0x%x)", -errorCode);
+        close();
+        return false;
+    }
+
+    snd_pcm_channel_params_t params = QnxAudioUtils::formatToChannelParams(m_format, QAudio::AudioInput, info.max_fragment_size);
+
+    if ((errorCode = snd_pcm_plugin_params(m_pcmHandle, &params)) < 0) {
+        qWarning("QnxAudioInput: open error, couldn't set channel params (0x%x)", -errorCode);
+        close();
+        return false;
+    }
+
+    if ((errorCode = snd_pcm_plugin_prepare(m_pcmHandle, SND_PCM_CHANNEL_CAPTURE)) < 0) {
+        qWarning("QnxAudioInput: open error, couldn't prepare channel (0x%x)", -errorCode);
+        close();
+        return false;
+    }
+
+    snd_pcm_channel_setup_t setup;
+
+    memset(&setup, 0, sizeof(setup));
+    setup.channel = SND_PCM_CHANNEL_CAPTURE;
+    if ((errorCode = snd_pcm_plugin_setup(m_pcmHandle, &setup)) < 0) {
+        qWarning("QnxAudioInput: open error, couldn't get channel setup (0x%x)", -errorCode);
+        close();
+        return false;
+    }
+
+    m_periodSize = qMin(2048, setup.buf.block.frag_size);
+
+    m_clockStamp.restart();
+    m_timeStamp.restart();
+    m_elapsedTimeOffset = 0;
+    m_totalTimeValue = 0;
+    m_bytesRead = 0;
+
+    m_pcmNotifier = new QSocketNotifier(snd_pcm_file_descriptor(m_pcmHandle, SND_PCM_CHANNEL_CAPTURE),
+                                        QSocketNotifier::Read, this);
+    connect(m_pcmNotifier, SIGNAL(activated(int)), SLOT(userFeed()));
+
+    return true;
+}
+
+void QnxAudioInput::close()
+{
+    if (m_pcmHandle)
+        snd_pcm_plugin_flush(m_pcmHandle, SND_PCM_CHANNEL_CAPTURE);
+
+    if (m_pcmNotifier) {
+        delete m_pcmNotifier;
+        m_pcmNotifier = 0;
+    }
+
+    if (m_pcmHandle) {
+        snd_pcm_close(m_pcmHandle);
+        m_pcmHandle = 0;
+    }
+
+    if (!m_pullMode && m_audioSource) {
+        delete m_audioSource;
+        m_audioSource = 0;
+    }
+}
+
+qint64 QnxAudioInput::read(char *data, qint64 len)
+{
+    int errorCode = 0;
+    QByteArray tempBuffer(m_periodSize, 0);
+
+    const int actualRead = snd_pcm_plugin_read(m_pcmHandle, tempBuffer.data(), m_periodSize);
+    if (actualRead < 1) {
+        snd_pcm_channel_status_t status;
+        memset(&status, 0, sizeof(status));
+        status.channel = SND_PCM_CHANNEL_CAPTURE;
+        if ((errorCode = snd_pcm_plugin_status(m_pcmHandle, &status)) < 0) {
+            qWarning("QnxAudioInput: read error, couldn't get plugin status (0x%x)", -errorCode);
+            close();
+            setError(QAudio::FatalError);
+            setState(QAudio::StoppedState);
+            return -1;
+        }
+
+        if (status.status == SND_PCM_STATUS_READY
+            || status.status == SND_PCM_STATUS_OVERRUN) {
+            if ((errorCode = snd_pcm_plugin_prepare(m_pcmHandle, SND_PCM_CHANNEL_CAPTURE)) < 0) {
+                qWarning("QnxAudioInput: read error, couldn't prepare plugin (0x%x)", -errorCode);
+                close();
+                setError(QAudio::FatalError);
+                setState(QAudio::StoppedState);
+                return -1;
+            }
+        }
+    } else {
+        setError(QAudio::NoError);
+        setState(QAudio::ActiveState);
+    }
+
+    if (m_volume < 1.0f)
+        QAudioHelperInternal::qMultiplySamples(m_volume, m_format, tempBuffer.data(), tempBuffer.data(), actualRead);
+
+    m_bytesRead += actualRead;
+
+    if (m_pullMode) {
+        m_audioSource->write(tempBuffer.data(), actualRead);
+    } else {
+        memcpy(data, tempBuffer.data(), qMin(static_cast<qint64>(actualRead), len));
+    }
+
+    m_bytesAvailable = 0;
+
+    return actualRead;
+}
+
+void QnxAudioInput::setError(QAudio::Error error)
+{
+    if (m_error == error)
+        return;
+
+    m_error = error;
+    emit errorChanged(m_error);
+}
+
+void QnxAudioInput::setState(QAudio::State state)
+{
+    if (m_state == state)
+        return;
+
+    m_state = state;
+    emit stateChanged(m_state);
+}
+
+InputPrivate::InputPrivate(QnxAudioInput *audio)
+    : m_audioDevice(audio)
+{
+}
+
+qint64 InputPrivate::readData(char *data, qint64 len)
+{
+    return m_audioDevice->read(data, len);
+}
+
+qint64 InputPrivate::writeData(const char *data, qint64 len)
+{
+    Q_UNUSED(data)
+    Q_UNUSED(len)
+    return 0;
+}
+
+void InputPrivate::trigger()
+{
+    emit readyRead();
+}
+
+QT_END_NAMESPACE
diff --git a/src/plugins/qnx/audio/qnxaudioinput.h b/src/plugins/qnx/audio/qnxaudioinput.h
new file mode 100644
index 000000000..3084b1de3
--- /dev/null
+++ b/src/plugins/qnx/audio/qnxaudioinput.h
@@ -0,0 +1,139 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Research In Motion
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QNXAUDIOINPUT_H
+#define QNXAUDIOINPUT_H
+
+#include "qaudiosystem.h"
+
+#include <QSocketNotifier>
+#include <QTime>
+#include <QTimer>
+
+#include <sys/asoundlib.h>
+
+QT_BEGIN_NAMESPACE
+
+class QnxAudioInput : public QAbstractAudioInput
+{
+    Q_OBJECT
+
+public:
+    QnxAudioInput();
+    ~QnxAudioInput();
+
+    void start(QIODevice*) Q_DECL_OVERRIDE;
+    QIODevice* start() Q_DECL_OVERRIDE;
+    void stop() Q_DECL_OVERRIDE;
+    void reset() Q_DECL_OVERRIDE;
+    void suspend() Q_DECL_OVERRIDE;
+    void resume() Q_DECL_OVERRIDE;
+    int bytesReady() const Q_DECL_OVERRIDE;
+    int periodSize() const Q_DECL_OVERRIDE;
+    void setBufferSize(int ) Q_DECL_OVERRIDE;
+    int bufferSize() const  Q_DECL_OVERRIDE;
+    void setNotifyInterval(int ) Q_DECL_OVERRIDE;
+    int notifyInterval() const Q_DECL_OVERRIDE;
+    qint64 processedUSecs() const Q_DECL_OVERRIDE;
+    qint64 elapsedUSecs() const Q_DECL_OVERRIDE;
+    QAudio::Error error() const Q_DECL_OVERRIDE;
+    QAudio::State state() const Q_DECL_OVERRIDE;
+    void setFormat(const QAudioFormat&) Q_DECL_OVERRIDE;
+    QAudioFormat format() const Q_DECL_OVERRIDE;
+    void setVolume(qreal) Q_DECL_OVERRIDE;
+    qreal volume() const Q_DECL_OVERRIDE;
+
+private slots:
+    void userFeed();
+    bool deviceReady();
+
+private:
+    friend class InputPrivate;
+
+    bool open();
+    void close();
+    qint64 read(char *data, qint64 len);
+    void setError(QAudio::Error error);
+    void setState(QAudio::State state);
+
+    QTime m_timeStamp;
+    QTime m_clockStamp;
+    QAudioFormat m_format;
+
+    QIODevice *m_audioSource;
+    snd_pcm_t *m_pcmHandle;
+    QSocketNotifier *m_pcmNotifier;
+
+    QAudio::Error m_error;
+    QAudio::State m_state;
+
+    qint64 m_bytesRead;
+    qint64 m_elapsedTimeOffset;
+    qint64 m_totalTimeValue;
+
+    qreal m_volume;
+
+    int m_bytesAvailable;
+    int m_bufferSize;
+    int m_periodSize;
+    int m_intervalTime;
+
+    bool m_pullMode;
+};
+
+class InputPrivate : public QIODevice
+{
+    Q_OBJECT
+public:
+    InputPrivate(QnxAudioInput *audio);
+
+    qint64 readData(char *data, qint64 len) Q_DECL_OVERRIDE;
+    qint64 writeData(const char *data, qint64 len) Q_DECL_OVERRIDE;
+
+    void trigger();
+
+private:
+    QnxAudioInput *m_audioDevice;
+};
+
+QT_END_NAMESPACE
+
+#endif
diff --git a/src/plugins/qnx/audio/qnxaudioplugin.cpp b/src/plugins/qnx/audio/qnxaudioplugin.cpp
index e24374a4e..f63474f90 100644
--- a/src/plugins/qnx/audio/qnxaudioplugin.cpp
+++ b/src/plugins/qnx/audio/qnxaudioplugin.cpp
@@ -42,10 +42,12 @@
 #include "qnxaudioplugin.h"
 
 #include "qnxaudiodeviceinfo.h"
+#include "qnxaudioinput.h"
 #include "qnxaudiooutput.h"
 
 #include <sys/asoundlib.h>
 
+static const char *INPUT_ID = "QnxAudioInput";
 static const char *OUTPUT_ID = "QnxAudioOutput";
 
 QT_BEGIN_NAMESPACE
@@ -60,13 +62,14 @@ QList<QByteArray> QnxAudioPlugin::availableDevices(QAudio::Mode mode) const
     if (mode == QAudio::AudioOutput)
         return QList<QByteArray>() << OUTPUT_ID;
     else
-        return QList<QByteArray>();
+        return QList<QByteArray>() << INPUT_ID;
 }
 
 QAbstractAudioInput *QnxAudioPlugin::createInput(const QByteArray &device)
 {
+    Q_ASSERT(device == INPUT_ID);
     Q_UNUSED(device);
-    return 0;
+    return new QnxAudioInput();
 }
 
 QAbstractAudioOutput *QnxAudioPlugin::createOutput(const QByteArray &device)