1 files changed, 443 insertions, 0 deletions
diff --git a/src/plugins/qnx-audio/audio/qnxaudiooutput.cpp b/src/plugins/qnx-audio/audio/qnxaudiooutput.cpp
new file mode 100644
index 000000000..4a82e93bb
--- /dev/null
+++ b/src/plugins/qnx-audio/audio/qnxaudiooutput.cpp
@@ -0,0 +1,443 @@
+/****************************************************************************
+**
+** 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 "qnxaudiooutput.h"
+
+#include "qnxaudioutils.h"
+
+#include <private/qaudiohelpers_p.h>
+
+QT_BEGIN_NAMESPACE
+
+QnxAudioOutput::QnxAudioOutput()
+    : m_source(0),
+      m_pushSource(false),
+      m_notifyInterval(1000),
+      m_error(QAudio::NoError),
+      m_state(QAudio::StoppedState),
+      m_volume(1.0),
+      m_periodSize(0),
+      m_pcmHandle(0),
+      m_bytesWritten(0),
+      m_intervalOffset(0)
+{
+    m_timer.setSingleShot(false);
+    m_timer.setInterval(20);
+    connect(&m_timer, SIGNAL(timeout()), this, SLOT(pullData()));
+}
+
+QnxAudioOutput::~QnxAudioOutput()
+{
+    stop();
+}
+
+void QnxAudioOutput::start(QIODevice *source)
+{
+    if (m_state != QAudio::StoppedState)
+        stop();
+
+    m_error = QAudio::NoError;
+    m_source = source;
+    m_pushSource = false;
+
+    if (open()) {
+        setState(QAudio::ActiveState);
+        m_timer.start();
+    } else {
+        setError(QAudio::OpenError);
+        setState(QAudio::StoppedState);
+    }
+}
+
+QIODevice *QnxAudioOutput::start()
+{
+    if (m_state != QAudio::StoppedState)
+        stop();
+
+    m_error = QAudio::NoError;
+    m_source = new QnxPushIODevice(this);
+    m_source->open(QIODevice::WriteOnly|QIODevice::Unbuffered);
+    m_pushSource = true;
+
+    if (open())
+        setState(QAudio::IdleState);
+    else {
+        setError(QAudio::OpenError);
+        setState(QAudio::StoppedState);
+    }
+
+    return m_source;
+}
+
+void QnxAudioOutput::stop()
+{
+    if (m_state == QAudio::StoppedState)
+        return;
+
+    setError(QAudio::NoError);
+    setState(QAudio::StoppedState);
+    close();
+}
+
+void QnxAudioOutput::reset()
+{
+    if (m_pcmHandle)
+        snd_pcm_playback_drain(m_pcmHandle);
+    stop();
+}
+
+void QnxAudioOutput::suspend()
+{
+    m_timer.stop();
+    setState(QAudio::SuspendedState);
+}
+
+void QnxAudioOutput::resume()
+{
+    if (m_pushSource)
+        setState(QAudio::IdleState);
+    else {
+        setState(QAudio::ActiveState);
+        m_timer.start();
+    }
+}
+
+int QnxAudioOutput::bytesFree() const
+{
+    if (m_state != QAudio::ActiveState && m_state != QAudio::IdleState)
+        return 0;
+
+    snd_pcm_channel_status_t status;
+    status.channel = SND_PCM_CHANNEL_PLAYBACK;
+    const int errorCode = snd_pcm_plugin_status(m_pcmHandle, &status);
+
+    if (errorCode)
+        return 0;
+    else
+        return status.free;
+}
+
+int QnxAudioOutput::periodSize() const
+{
+     return m_periodSize;
+}
+
+void QnxAudioOutput::setNotifyInterval(int ms)
+{
+    m_notifyInterval = ms;
+}
+
+int QnxAudioOutput::notifyInterval() const
+{
+    return m_notifyInterval;
+}
+
+qint64 QnxAudioOutput::processedUSecs() const
+{
+    return qint64(1000000) * m_format.framesForBytes(m_bytesWritten) / m_format.sampleRate();
+}
+
+qint64 QnxAudioOutput::elapsedUSecs() const
+{
+    if (m_state == QAudio::StoppedState)
+        return 0;
+    else
+        return m_startTimeStamp.elapsed() * 1000;
+}
+
+QAudio::Error QnxAudioOutput::error() const
+{
+    return m_error;
+}
+
+QAudio::State QnxAudioOutput::state() const
+{
+    return m_state;
+}
+
+void QnxAudioOutput::setFormat(const QAudioFormat &format)
+{
+    if (m_state == QAudio::StoppedState)
+        m_format = format;
+}
+
+QAudioFormat QnxAudioOutput::format() const
+{
+    return m_format;
+}
+
+void QnxAudioOutput::setVolume(qreal volume)
+{
+    m_volume = qBound(qreal(0.0), volume, qreal(1.0));
+}
+
+qreal QnxAudioOutput::volume() const
+{
+    return m_volume;
+}
+
+void QnxAudioOutput::pullData()
+{
+    if (m_state == QAudio::StoppedState || m_state == QAudio::SuspendedState)
+        return;
+
+    const int bytesAvailable = bytesFree();
+    const int frames = m_format.framesForBytes(bytesAvailable);
+
+    if (frames == 0 || bytesAvailable < periodSize())
+        return;
+
+    const int bytesRequested = m_format.bytesForFrames(frames);
+
+    char buffer[bytesRequested];
+    const int bytesRead = m_source->read(buffer, bytesRequested);
+
+    // reading can take a while and stream may have been stopped
+    if (!m_pcmHandle)
+        return;
+
+    if (bytesRead > 0) {
+        // Got some data to output
+        if (m_state != QAudio::ActiveState)
+            return;
+
+        const qint64 bytesWritten = write(buffer, bytesRead);
+        if (bytesWritten != bytesRead)
+            m_source->seek(m_source->pos()-(bytesRead-bytesWritten));
+
+    } else {
+        // We're done
+        close();
+        if (bytesRead != 0)
+            setError(QAudio::IOError);
+        setState(QAudio::StoppedState);
+    }
+
+    if (m_state != QAudio::ActiveState)
+        return;
+
+    if (m_notifyInterval > 0 && (m_intervalTimeStamp.elapsed() + m_intervalOffset) > m_notifyInterval) {
+        emit notify();
+        m_intervalOffset = m_intervalTimeStamp.elapsed() + m_intervalOffset - m_notifyInterval;
+        m_intervalTimeStamp.restart();
+    }
+}
+
+bool QnxAudioOutput::open()
+{
+    if (!m_format.isValid() || m_format.sampleRate() <= 0) {
+        if (!m_format.isValid())
+            qWarning("QnxAudioOutput: open error, invalid format.");
+        else
+            qWarning("QnxAudioOutput: 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_PLAYBACK)) < 0) {
+        qWarning("QnxAudioOutput: open error, couldn't open card (0x%x)", -errorCode);
+        return false;
+    }
+
+    if ((errorCode = snd_pcm_nonblock_mode(m_pcmHandle, 0)) < 0) {
+        qWarning("QnxAudioOutput: open error, couldn't set non block mode (0x%x)", -errorCode);
+        close();
+        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_PLAYBACK;
+    if ((errorCode = snd_pcm_plugin_info(m_pcmHandle, &info)) < 0) {
+        qWarning("QnxAudioOutput: open error, couldn't get channel info (0x%x)", -errorCode);
+        close();
+        return false;
+    }
+
+    snd_pcm_channel_params_t params = QnxAudioUtils::formatToChannelParams(m_format, QAudio::AudioOutput, info.max_fragment_size);
+
+    if ((errorCode = snd_pcm_plugin_params(m_pcmHandle, &params)) < 0) {
+        qWarning("QnxAudioOutput: open error, couldn't set channel params (0x%x)", -errorCode);
+        close();
+        return false;
+    }
+
+    if ((errorCode = snd_pcm_plugin_prepare(m_pcmHandle, SND_PCM_CHANNEL_PLAYBACK)) < 0) {
+        qWarning("QnxAudioOutput: 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_PLAYBACK;
+    if ((errorCode = snd_pcm_plugin_setup(m_pcmHandle, &setup)) < 0) {
+        qWarning("QnxAudioOutput: open error, couldn't get channel setup (0x%x)", -errorCode);
+        close();
+        return false;
+    }
+
+    m_periodSize = qMin(2048, setup.buf.block.frag_size);
+    m_startTimeStamp.restart();
+    m_intervalTimeStamp.restart();
+    m_intervalOffset = 0;
+    m_bytesWritten = 0;
+
+    return true;
+}
+
+void QnxAudioOutput::close()
+{
+    m_timer.stop();
+
+    if (m_pcmHandle) {
+        snd_pcm_plugin_flush(m_pcmHandle, SND_PCM_CHANNEL_PLAYBACK);
+        snd_pcm_close(m_pcmHandle);
+        m_pcmHandle = 0;
+    }
+
+    if (m_pushSource) {
+        delete m_source;
+        m_source = 0;
+    }
+}
+
+void QnxAudioOutput::setError(QAudio::Error error)
+{
+    if (m_error != error) {
+        m_error = error;
+        emit errorChanged(error);
+    }
+}
+
+void QnxAudioOutput::setState(QAudio::State state)
+{
+    if (m_state != state) {
+        m_state = state;
+        emit stateChanged(state);
+    }
+}
+
+qint64 QnxAudioOutput::write(const char *data, qint64 len)
+{
+    if (!m_pcmHandle)
+        return 0;
+
+    // Make sure we're writing (N * frame) worth of bytes
+    const int size = m_format.bytesForFrames(qBound(qint64(0), qint64(bytesFree()), len) / m_format.bytesPerFrame());
+
+    if (size == 0)
+        return 0;
+
+    int written = 0;
+
+    if (m_volume < 1.0f) {
+        char out[size];
+        QAudioHelperInternal::qMultiplySamples(m_volume, m_format, data, out, size);
+        written = snd_pcm_plugin_write(m_pcmHandle, out, size);
+    } else {
+        written = snd_pcm_plugin_write(m_pcmHandle, data, size);
+    }
+
+    if (written > 0) {
+        m_bytesWritten += written;
+        setError(QAudio::NoError);
+        setState(QAudio::ActiveState);
+        return written;
+    } else {
+        close();
+        setError(QAudio::FatalError);
+        setState(QAudio::StoppedState);
+        return 0;
+    }
+}
+
+QnxPushIODevice::QnxPushIODevice(QnxAudioOutput *output)
+    : QIODevice(output),
+      m_output(output)
+{
+}
+
+QnxPushIODevice::~QnxPushIODevice()
+{
+}
+
+qint64 QnxPushIODevice::readData(char *data, qint64 len)
+{
+    Q_UNUSED(data);
+    Q_UNUSED(len);
+    return 0;
+}
+
+qint64 QnxPushIODevice::writeData(const char *data, qint64 len)
+{
+    int retry = 0;
+    qint64 written = 0;
+
+    if (m_output->state() == QAudio::ActiveState
+     || m_output->state() == QAudio::IdleState) {
+        while (written < len) {
+            const int writeSize = m_output->write(data + written, len - written);
+
+            if (writeSize <= 0) {
+                retry++;
+                if (retry > 10)
+                    return written;
+                else
+                    continue;
+            }
+
+            retry = 0;
+            written += writeSize;
+        }
+    }
+
+    return written;
+}
+
+QT_END_NAMESPACE