--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/multimedia/gstreamer/mediaplayer/qgstreamerplayercontrol.cpp	Wed Aug 25 15:49:42 2010 +0300
@@ -0,0 +1,496 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgstreamerplayercontrol.h"
+#include "qgstreamerplayersession.h"
+
+#include <qmediaplaylistnavigator.h>
+
+#include <QtCore/qdir.h>
+#include <QtCore/qsocketnotifier.h>
+#include <QtCore/qurl.h>
+#include <QtCore/qdebug.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+QGstreamerPlayerControl::QGstreamerPlayerControl(QGstreamerPlayerSession *session, QObject *parent)
+    : QMediaPlayerControl(parent)
+    , m_session(session)
+    , m_state(QMediaPlayer::StoppedState)
+    , m_mediaStatus(QMediaPlayer::NoMedia)
+    , m_bufferProgress(-1)
+    , m_seekToStartPending(false)
+    , m_stream(0)
+    , m_fifoNotifier(0)
+    , m_fifoCanWrite(false)
+    , m_bufferSize(0)
+    , m_bufferOffset(0)
+{
+    m_fifoFd[0] = -1;
+    m_fifoFd[1] = -1;
+
+    connect(m_session, SIGNAL(positionChanged(qint64)),
+            this, SIGNAL(positionChanged(qint64)));
+    connect(m_session, SIGNAL(durationChanged(qint64)),
+            this, SIGNAL(durationChanged(qint64)));
+    connect(m_session, SIGNAL(mutedStateChanged(bool)),
+            this, SIGNAL(mutedChanged(bool)));
+    connect(m_session, SIGNAL(volumeChanged(int)),
+            this, SIGNAL(volumeChanged(int)));
+    connect(m_session, SIGNAL(stateChanged(QMediaPlayer::State)),
+            this, SLOT(updateState(QMediaPlayer::State)));
+    connect(m_session,SIGNAL(bufferingProgressChanged(int)),
+            this, SLOT(setBufferProgress(int)));
+    connect(m_session, SIGNAL(playbackFinished()),
+            this, SLOT(processEOS()));
+    connect(m_session, SIGNAL(audioAvailableChanged(bool)),
+            this, SIGNAL(audioAvailableChanged(bool)));
+    connect(m_session, SIGNAL(videoAvailableChanged(bool)),
+            this, SIGNAL(videoAvailableChanged(bool)));
+    connect(m_session, SIGNAL(seekableChanged(bool)),
+            this, SIGNAL(seekableChanged(bool)));
+    connect(m_session, SIGNAL(error(int,QString)),
+            this, SIGNAL(error(int,QString)));
+}
+
+QGstreamerPlayerControl::~QGstreamerPlayerControl()
+{
+    if (m_fifoFd[0] >= 0) {
+        ::close(m_fifoFd[0]);
+        ::close(m_fifoFd[1]);
+        m_fifoFd[0] = -1;
+        m_fifoFd[1] = -1;
+    }
+}
+
+qint64 QGstreamerPlayerControl::position() const
+{
+    return m_seekToStartPending ? 0 : m_session->position();
+}
+
+qint64 QGstreamerPlayerControl::duration() const
+{
+    return m_session->duration();
+}
+
+QMediaPlayer::State QGstreamerPlayerControl::state() const
+{
+    return m_state;
+}
+
+QMediaPlayer::MediaStatus QGstreamerPlayerControl::mediaStatus() const
+{
+    return m_mediaStatus;
+}
+
+int QGstreamerPlayerControl::bufferStatus() const
+{
+    if (m_bufferProgress == -1) {
+        return m_session->state() == QMediaPlayer::StoppedState ? 0 : 100;
+    } else
+        return m_bufferProgress;
+}
+
+int QGstreamerPlayerControl::volume() const
+{
+    return m_session->volume();
+}
+
+bool QGstreamerPlayerControl::isMuted() const
+{
+    return m_session->isMuted();
+}
+
+bool QGstreamerPlayerControl::isSeekable() const
+{
+    return m_session->isSeekable();
+}
+
+QMediaTimeRange QGstreamerPlayerControl::availablePlaybackRanges() const
+{
+    QMediaTimeRange ranges;
+
+    if (m_session->isSeekable())
+        ranges.addInterval(0, m_session->duration());
+
+    return ranges;
+}
+
+qreal QGstreamerPlayerControl::playbackRate() const
+{
+    return m_session->playbackRate();
+}
+
+void QGstreamerPlayerControl::setPlaybackRate(qreal rate)
+{
+    m_session->setPlaybackRate(rate);
+}
+
+void QGstreamerPlayerControl::setPosition(qint64 pos)
+{
+    if (m_mediaStatus == QMediaPlayer::EndOfMedia) {
+        m_mediaStatus = QMediaPlayer::LoadedMedia;
+        emit mediaStatusChanged(m_mediaStatus);
+    }
+
+    if (m_session->seek(pos))
+        m_seekToStartPending = false;
+}
+
+void QGstreamerPlayerControl::play()
+{
+    playOrPause(QMediaPlayer::PlayingState);
+}
+
+void QGstreamerPlayerControl::pause()
+{
+    playOrPause(QMediaPlayer::PausedState);
+}
+
+void QGstreamerPlayerControl::playOrPause(QMediaPlayer::State newState)
+{
+    QMediaPlayer::State oldState = m_state;
+    QMediaPlayer::MediaStatus oldMediaStatus = m_mediaStatus;
+
+    if (m_mediaStatus == QMediaPlayer::EndOfMedia)
+        m_mediaStatus = QMediaPlayer::BufferedMedia;
+
+    if (m_seekToStartPending) {
+        m_session->pause();
+        if (!m_session->seek(0)) {
+            m_bufferProgress = -1;
+            m_session->stop();
+            m_mediaStatus = QMediaPlayer::LoadingMedia;
+        }
+        m_seekToStartPending = false;
+    }
+
+    bool ok = false;
+    if (newState == QMediaPlayer::PlayingState)
+        ok = m_session->play();
+    else
+        ok = m_session->pause();
+
+    if (!ok)
+        return;
+
+    m_state = newState;
+
+    if (m_mediaStatus == QMediaPlayer::EndOfMedia || m_mediaStatus == QMediaPlayer::LoadedMedia) {
+        if (m_bufferProgress == -1 || m_bufferProgress == 100)
+            m_mediaStatus = QMediaPlayer::BufferedMedia;
+        else
+            m_mediaStatus = QMediaPlayer::BufferingMedia;
+    }
+
+    if (m_state != oldState)
+        emit stateChanged(m_state);
+    if (m_mediaStatus != oldMediaStatus)
+        emit mediaStatusChanged(m_mediaStatus);
+
+}
+
+void QGstreamerPlayerControl::stop()
+{
+    if (m_state != QMediaPlayer::StoppedState) {
+        m_state = QMediaPlayer::StoppedState;
+        m_session->pause();
+        m_seekToStartPending = true;
+        updateState(m_session->state());
+        emit positionChanged(0);
+        emit stateChanged(m_state);
+    }
+}
+
+void QGstreamerPlayerControl::setVolume(int volume)
+{
+    m_session->setVolume(volume);
+}
+
+void QGstreamerPlayerControl::setMuted(bool muted)
+{
+    m_session->setMuted(muted);
+}
+
+QMediaContent QGstreamerPlayerControl::media() const
+{
+    return m_currentResource;
+}
+
+const QIODevice *QGstreamerPlayerControl::mediaStream() const
+{
+    return m_stream;
+}
+
+void QGstreamerPlayerControl::setMedia(const QMediaContent &content, QIODevice *stream)
+{
+    QMediaPlayer::State oldState = m_state;
+    m_state = QMediaPlayer::StoppedState;    
+    m_session->stop();
+
+    if (m_bufferProgress != -1) {
+        m_bufferProgress = -1;
+        emit bufferStatusChanged(0);
+    }
+
+    if (m_stream) {
+        closeFifo();
+
+        disconnect(m_stream, SIGNAL(readyRead()), this, SLOT(writeFifo()));
+        m_stream = 0;
+    }
+
+    m_currentResource = content;
+    m_stream = stream;
+    m_seekToStartPending = false;
+
+    QNetworkRequest request;
+
+    if (m_stream) {
+        if (m_stream->isReadable() && openFifo()) {
+            request = QNetworkRequest(QUrl(QString(QLatin1String("fd://%1")).arg(m_fifoFd[0])));
+        }
+    } else if (!content.isNull()) {
+        request = content.canonicalRequest();
+    }
+
+    m_session->load(request);    
+
+    if (m_fifoFd[1] >= 0) {
+        m_fifoCanWrite = true;
+
+        writeFifo();
+    }
+
+    if (!request.url().isEmpty()) {
+        if (m_mediaStatus != QMediaPlayer::LoadingMedia)
+            emit mediaStatusChanged(m_mediaStatus = QMediaPlayer::LoadingMedia);
+        m_session->pause();
+    } else {
+        if (m_mediaStatus != QMediaPlayer::NoMedia)
+            emit mediaStatusChanged(m_mediaStatus = QMediaPlayer::NoMedia);
+        setBufferProgress(0);
+    }
+
+    emit mediaChanged(m_currentResource);
+    if (m_state != oldState)
+        emit stateChanged(m_state);
+}
+
+void QGstreamerPlayerControl::setVideoOutput(QObject *output)
+{
+    m_session->setVideoRenderer(output);
+}
+
+bool QGstreamerPlayerControl::isAudioAvailable() const
+{
+    return m_session->isAudioAvailable();
+}
+
+bool QGstreamerPlayerControl::isVideoAvailable() const
+{
+    return m_session->isVideoAvailable();
+}
+
+void QGstreamerPlayerControl::updateState(QMediaPlayer::State state)
+{
+    QMediaPlayer::MediaStatus oldStatus = m_mediaStatus;
+    QMediaPlayer::State oldState = m_state;
+
+    switch (state) {
+    case QMediaPlayer::StoppedState:
+        m_state = QMediaPlayer::StoppedState;
+        if (m_currentResource.isNull())
+            m_mediaStatus = QMediaPlayer::NoMedia;
+        else
+            m_mediaStatus = QMediaPlayer::LoadingMedia;
+        break;
+
+    case QMediaPlayer::PlayingState:
+    case QMediaPlayer::PausedState:
+        if (m_state == QMediaPlayer::StoppedState) {
+            m_mediaStatus = QMediaPlayer::LoadedMedia;
+        } else {
+            if (m_bufferProgress == -1 || m_bufferProgress == 100)
+                m_mediaStatus = QMediaPlayer::BufferedMedia;
+        }
+        break;
+    }
+
+    //EndOfMedia status should be kept, until reset by pause, play or setMedia
+    if (oldStatus == QMediaPlayer::EndOfMedia)
+        m_mediaStatus = QMediaPlayer::EndOfMedia;
+
+    if (m_state != oldState)
+        emit stateChanged(m_state);
+    if (m_mediaStatus != oldStatus)
+        emit mediaStatusChanged(m_mediaStatus);
+}
+
+void QGstreamerPlayerControl::processEOS()
+{
+    m_mediaStatus = QMediaPlayer::EndOfMedia;
+    stop();
+    emit mediaStatusChanged(m_mediaStatus);
+}
+
+void QGstreamerPlayerControl::setBufferProgress(int progress)
+{
+    if (m_bufferProgress == progress || m_mediaStatus == QMediaPlayer::NoMedia)
+        return;
+
+    QMediaPlayer::MediaStatus oldStatus = m_mediaStatus;
+
+    m_bufferProgress = progress;
+
+    if (m_state == QMediaPlayer::StoppedState) {
+        m_mediaStatus = QMediaPlayer::LoadedMedia;
+    } else {
+        if (m_bufferProgress < 100) {
+            m_mediaStatus = QMediaPlayer::StalledMedia;
+            m_session->pause();
+        } else {
+            m_mediaStatus = QMediaPlayer::BufferedMedia;
+            if (m_state == QMediaPlayer::PlayingState)
+                m_session->play();
+        }
+    }
+
+    if (m_mediaStatus != oldStatus)
+        emit mediaStatusChanged(m_mediaStatus);
+
+    emit bufferStatusChanged(m_bufferProgress);
+}
+
+void QGstreamerPlayerControl::writeFifo()
+{
+    if (m_fifoCanWrite) {
+        qint64 bytesToRead = qMin<qint64>(
+                m_stream->bytesAvailable(), PIPE_BUF - m_bufferSize);
+
+        if (bytesToRead > 0) {
+            int bytesRead = m_stream->read(&m_buffer[m_bufferOffset + m_bufferSize], bytesToRead);
+
+            if (bytesRead > 0)
+                m_bufferSize += bytesRead;
+        }
+
+        if (m_bufferSize > 0) {
+            int bytesWritten = ::write(m_fifoFd[1], &m_buffer[m_bufferOffset], size_t(m_bufferSize));
+
+            if (bytesWritten > 0) {
+                m_bufferOffset += bytesWritten;
+                m_bufferSize -= bytesWritten;
+
+                if (m_bufferSize == 0)
+                    m_bufferOffset = 0;
+            } else if (errno == EAGAIN) {
+                m_fifoCanWrite = false;
+            } else {
+                closeFifo();
+            }
+        }
+    }
+
+    m_fifoNotifier->setEnabled(m_stream->bytesAvailable() > 0);
+}
+
+void QGstreamerPlayerControl::fifoReadyWrite(int socket)
+{
+    if (socket == m_fifoFd[1]) {
+        m_fifoCanWrite = true;
+
+        writeFifo();
+    }
+}
+
+bool QGstreamerPlayerControl::openFifo()
+{
+    Q_ASSERT(m_fifoFd[0] < 0);
+    Q_ASSERT(m_fifoFd[1] < 0);
+
+    if (::pipe(m_fifoFd) == 0) {
+        int flags = ::fcntl(m_fifoFd[1], F_GETFD);
+
+        if (::fcntl(m_fifoFd[1], F_SETFD, flags | O_NONBLOCK) >= 0) {
+            m_fifoNotifier = new QSocketNotifier(m_fifoFd[1], QSocketNotifier::Write);
+
+            connect(m_fifoNotifier, SIGNAL(activated(int)), this, SLOT(fifoReadyWrite(int)));
+
+            return true;
+        } else {
+            qWarning("Failed to make pipe non blocking %d", errno);
+
+            ::close(m_fifoFd[0]);
+            ::close(m_fifoFd[1]);
+
+            m_fifoFd[0] = -1;
+            m_fifoFd[1] = -1;
+
+            return false;
+        }
+    } else {
+        qWarning("Failed to create pipe %d", errno);
+
+        return false;
+    }
+}
+
+void QGstreamerPlayerControl::closeFifo()
+{
+    if (m_fifoFd[0] >= 0) {
+        delete m_fifoNotifier;
+        m_fifoNotifier = 0;
+
+        ::close(m_fifoFd[0]);
+        ::close(m_fifoFd[1]);
+        m_fifoFd[0] = -1;
+        m_fifoFd[1] = -1;
+
+        m_fifoCanWrite = false;
+
+        m_bufferSize = 0;
+        m_bufferOffset = 0;
+    }
+}