Initial import of kinetic-animations branch from the old kinetic

repository to the new repository

1 files changed, 1387 insertions, 0 deletions

diff --git a/src/3rdparty/phonon/gstreamer/mediaobject.cpp b/src/3rdparty/phonon/gstreamer/mediaobject.cpp
new file mode 100644
index 0000000..5398f0c
--- /dev/null
+++ b/src/3rdparty/phonon/gstreamer/mediaobject.cpp
@@ -0,0 +1,1387 @@
+/*  This file is part of the KDE project.
+
+    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+
+    This library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2.1 or 3 of the License.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this library.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <cmath>
+#include <gst/interfaces/propertyprobe.h>
+#include "common.h"
+#include "mediaobject.h"
+#include "videowidget.h"
+#include "message.h"
+#include "backend.h"
+#include "streamreader.h"
+#include "phononsrc.h"
+
+#include <QtCore>
+#include <QtCore/QTimer>
+#include <QtCore/QVector>
+#include <QtCore/QFile>
+#include <QtCore/QByteRef>
+#include <QtCore/QStringList>
+#include <QtCore/QEvent>
+#include <QApplication>
+
+#define ABOUT_TO_FINNISH_TIME 2000
+#define MAX_QUEUE_TIME 20 * GST_SECOND
+
+QT_BEGIN_NAMESPACE
+
+namespace Phonon
+{
+namespace Gstreamer
+{
+
+MediaObject::MediaObject(Backend *backend, QObject *parent)
+        : QObject(parent)
+        , MediaNode(backend, AudioSource | VideoSource)
+        , m_resumeState(false)
+        , m_oldState(Phonon::LoadingState)
+        , m_oldPos(0)
+        , m_state(Phonon::LoadingState)
+        , m_pendingState(Phonon::LoadingState)
+        , m_tickTimer(new QTimer(this))
+        , m_prefinishMark(0)
+        , m_transitionTime(0)
+        , m_posAtSeek(-1)
+        , m_prefinishMarkReachedNotEmitted(true)
+        , m_aboutToFinishEmitted(false)
+        , m_loading(false)
+        , m_capsHandler(0)
+        , m_datasource(0)
+        , m_decodebin(0)
+        , m_audioPipe(0)
+        , m_videoPipe(0)
+        , m_totalTime(-1)
+        , m_bufferPercent(0)
+        , m_hasVideo(false)
+        , m_videoStreamFound(false)
+        , m_hasAudio(false)
+        , m_seekable(false)
+        , m_atEndOfStream(false)
+        , m_atStartOfStream(false)
+        , m_error(Phonon::NoError)
+        , m_pipeline(0)
+        , m_audioGraph(0)
+        , m_videoGraph(0)
+        , m_previousTickTime(-1)
+        , m_resetNeeded(false)
+{
+    qRegisterMetaType<GstCaps*>("GstCaps*");
+    qRegisterMetaType<State>("State");
+
+    static int count = 0;
+    m_name = "MediaObject" + QString::number(count++);
+
+    if (!m_backend->isValid()) {
+        setError(tr("Cannot start playback. \n\nCheck your Gstreamer installation and make sure you "
+                    "\nhave libgstreamer-plugins-base installed."), Phonon::FatalError);
+    } else {
+        m_root = this;
+        createPipeline();
+        m_backend->addBusWatcher(this);
+        connect(m_tickTimer, SIGNAL(timeout()), SLOT(emitTick()));
+    }
+    connect(this, SIGNAL(stateChanged(Phonon::State, Phonon::State)), 
+            this, SLOT(notifyStateChange(Phonon::State, Phonon::State)));
+
+}
+
+MediaObject::~MediaObject()
+{
+    m_backend->removeBusWatcher(this);
+    if (m_pipeline) {
+        gst_element_set_state(m_pipeline, GST_STATE_NULL);
+        gst_object_unref(m_pipeline);
+    }
+    if (m_audioGraph) {
+        gst_element_set_state(m_audioGraph, GST_STATE_NULL);
+        gst_object_unref(m_audioGraph);
+    }
+    if (m_videoGraph) {
+        gst_element_set_state(m_videoGraph, GST_STATE_NULL);
+        gst_object_unref(m_videoGraph);
+    }
+}
+
+QString stateString(const Phonon::State &state)
+{
+    switch (state) {
+    case Phonon::LoadingState:
+        return QString("LoadingState");
+    case Phonon::StoppedState:
+        return QString("StoppedState");
+    case Phonon::PlayingState:
+        return QString("PlayingState");
+    case Phonon::BufferingState:
+        return QString("BufferingState");
+    case Phonon::PausedState:
+        return QString("PausedState");
+    case Phonon::ErrorState:
+        return QString("ErrorState");
+    }
+    return QString();
+}
+
+void MediaObject::saveState()
+{
+    //Only first resumeState is respected
+    if (m_resumeState)
+        return;
+
+    if (m_pendingState == Phonon::PlayingState || m_pendingState == Phonon::PausedState) {
+        m_resumeState = true;
+        m_oldState = m_pendingState;
+        m_oldPos = getPipelinePos();
+    }
+}
+
+void MediaObject::resumeState()
+{
+    if (m_resumeState)
+        QMetaObject::invokeMethod(this, "setState", Qt::QueuedConnection, Q_ARG(State, m_oldState));
+}
+
+void MediaObject::newPadAvailable (GstPad *pad)
+{
+    GstCaps *caps;
+    GstStructure *str;
+    caps = gst_pad_get_caps (pad);
+    if (caps) {
+        str = gst_caps_get_structure (caps, 0);
+        QString mediaString(gst_structure_get_name (str));
+
+        if (mediaString.startsWith("video")) {
+            connectVideo(pad);
+        } else if (mediaString.startsWith("audio")) {
+            connectAudio(pad);
+        } else {
+            m_backend->logMessage("Could not connect pad", Backend::Warning);
+        }
+        gst_caps_unref (caps);
+    }
+}
+
+void MediaObject::cb_newpad (GstElement *decodebin,
+                             GstPad     *pad,
+                             gboolean    last,
+                             gpointer    data)
+{
+    Q_UNUSED(decodebin);
+    Q_UNUSED(pad);
+    Q_UNUSED(last);
+    Q_UNUSED(data);
+
+    MediaObject *media = static_cast<MediaObject*>(data);
+    Q_ASSERT(media);
+    media->newPadAvailable(pad);
+}
+
+void MediaObject::noMorePadsAvailable ()
+{
+    if (m_missingCodecs.size() > 0) {
+        bool canPlay = (m_hasAudio || m_videoStreamFound);
+        Phonon::ErrorType error = canPlay ? Phonon::NormalError : Phonon::FatalError;
+        if (error == Phonon::NormalError && m_hasVideo && !m_videoStreamFound) {
+            m_hasVideo = false;
+            emit hasVideoChanged(false);
+        }
+        QString codecs = m_missingCodecs.join(", ");
+        setError(QString(tr("A required codec is missing. You need to install the following codec(s) to play this content: %0")).arg(codecs), error);
+        m_missingCodecs.clear();
+    }
+}
+
+void MediaObject::cb_no_more_pads (GstElement * decodebin, gpointer data)
+{
+    Q_UNUSED(decodebin);
+    MediaObject *media = static_cast<MediaObject*>(data);
+    Q_ASSERT(media);
+    QMetaObject::invokeMethod(media, "noMorePadsAvailable", Qt::QueuedConnection);
+}
+
+typedef void (*Ptr_gst_pb_utils_init)();
+typedef gchar* (*Ptr_gst_pb_utils_get_codec_description)(const GstCaps *);
+
+void MediaObject::cb_unknown_type (GstElement *decodebin, GstPad *pad, GstCaps *caps, gpointer data)
+{
+    Q_UNUSED(decodebin);
+    Q_UNUSED(pad);
+    MediaObject *media = static_cast<MediaObject*>(data);
+    Q_ASSERT(media);
+
+    QString value = "unknown codec";
+
+    // These functions require GStreamer > 0.10.12
+    static Ptr_gst_pb_utils_init p_gst_pb_utils_init = 0;
+    static Ptr_gst_pb_utils_get_codec_description p_gst_pb_utils_get_codec_description = 0;
+    if (!p_gst_pb_utils_init) {
+        p_gst_pb_utils_init =  (Ptr_gst_pb_utils_init)QLibrary::resolve(QLatin1String("gstpbutils-0.10"), 0, "gst_pb_utils_init");
+        p_gst_pb_utils_get_codec_description =  (Ptr_gst_pb_utils_get_codec_description)QLibrary::resolve(QLatin1String("gstpbutils-0.10"), 0, "gst_pb_utils_get_codec_description");
+        if (p_gst_pb_utils_init)
+	    p_gst_pb_utils_init();
+    }
+    if (p_gst_pb_utils_get_codec_description) {
+        gchar *codecName = NULL;
+        codecName = p_gst_pb_utils_get_codec_description (caps);
+        value = QString::fromUtf8(codecName);
+        g_free (codecName);
+    } else {
+        // For GStreamer versions < 0.10.12
+        GstStructure *str = gst_caps_get_structure (caps, 0);
+        value = QString::fromUtf8(gst_structure_get_name (str));
+    }
+    media->addMissingCodecName(value);
+}
+
+static void notifyVideoCaps(GObject *obj, GParamSpec *, gpointer data)
+{
+    GstPad *pad = GST_PAD(obj);
+    GstCaps *caps = gst_pad_get_caps (pad);
+    Q_ASSERT(caps);
+    MediaObject *media = static_cast<MediaObject*>(data);
+
+    // We do not want any more notifications until the source changes
+    g_signal_handler_disconnect(pad, media->capsHandler());
+
+    // setVideoCaps calls loadingComplete(), meaning we cannot call it from
+    // the streaming thread
+    QMetaObject::invokeMethod(media, "setVideoCaps", Qt::QueuedConnection, Q_ARG(GstCaps *, caps));
+}
+
+void MediaObject::setVideoCaps(GstCaps *caps)
+{
+    GstStructure *str;
+    gint width, height;
+
+    if ((str = gst_caps_get_structure (caps, 0))) {
+        if (gst_structure_get_int (str, "width", &width) && gst_structure_get_int (str, "height", &height)) {
+            gint aspectNum = 0;
+            gint aspectDenum = 0;
+            if (gst_structure_get_fraction(str, "pixel-aspect-ratio", &aspectNum, &aspectDenum)) {
+                if (aspectDenum > 0)
+                    width = width*aspectNum/aspectDenum;
+            }
+            // Let child nodes know about our new video size
+            QSize size(width, height);
+            MediaNodeEvent event(MediaNodeEvent::VideoSizeChanged, &size);
+            notify(&event);
+        }
+    }
+    gst_caps_unref(caps);
+}
+
+// Adds an element to the pipeline if not previously added
+bool MediaObject::addToPipeline(GstElement *elem)
+{
+    bool success = true;
+    if (!GST_ELEMENT_PARENT(elem)) { // If not already in pipeline
+        success = gst_bin_add(GST_BIN(m_pipeline), elem);
+    }
+    return success;
+}
+
+void MediaObject::connectVideo(GstPad *pad)
+{
+    GstState currentState = GST_STATE(m_pipeline);
+    if (addToPipeline(m_videoGraph)) {
+        GstPad *videopad = gst_element_get_pad (m_videoGraph, "sink");
+        if (!GST_PAD_IS_LINKED (videopad) && (gst_pad_link (pad, videopad) == GST_PAD_LINK_OK)) {
+            gst_element_set_state(m_videoGraph, currentState == GST_STATE_PLAYING ? GST_STATE_PLAYING : GST_STATE_PAUSED);
+            m_videoStreamFound = true;
+            m_backend->logMessage("Video track connected", Backend::Info, this);
+            // Note that the notify::caps _must_ be installed after linking to work with Dapper
+            m_capsHandler = g_signal_connect(pad, "notify::caps", G_CALLBACK(notifyVideoCaps), this);
+ 
+            if (!m_loading && !m_hasVideo) {
+                m_hasVideo = m_videoStreamFound;
+                emit hasVideoChanged(m_hasVideo);
+            }
+        }
+        gst_object_unref (videopad);
+    } else {
+        m_backend->logMessage("The video stream could not be plugged.", Backend::Info, this);
+    }
+}
+
+void MediaObject::connectAudio(GstPad *pad)
+{
+    GstState currentState = GST_STATE(m_pipeline);
+    if (addToPipeline(m_audioGraph)) {
+        GstPad *audiopad = gst_element_get_pad (m_audioGraph, "sink");
+        if (!GST_PAD_IS_LINKED (audiopad) && (gst_pad_link (pad, audiopad)==GST_PAD_LINK_OK)) {
+            gst_element_set_state(m_audioGraph, currentState == GST_STATE_PLAYING ? GST_STATE_PLAYING : GST_STATE_PAUSED);
+            m_hasAudio = true;
+            m_backend->logMessage("Audio track connected", Backend::Info, this);
+        }
+        gst_object_unref (audiopad);
+    } else {
+        m_backend->logMessage("The audio stream could not be plugged.", Backend::Info, this);
+    }
+}
+
+void MediaObject::cb_pad_added(GstElement *decodebin,
+                               GstPad     *pad,
+                               gpointer    data)
+{
+    Q_UNUSED(decodebin);
+    GstPad *decodepad = static_cast<GstPad*>(data);
+    gst_pad_link (pad, decodepad);
+    gst_object_unref (decodepad);
+}
+
+/**
+ * Create a media source from a given URL.
+ *
+ * returns true if successful
+ */
+bool MediaObject::createPipefromURL(const QUrl &url)
+{
+    // Remove any existing data source
+    if (m_datasource) {
+        gst_bin_remove(GST_BIN(m_pipeline), m_datasource);
+        // m_pipeline has the only ref to datasource
+        m_datasource = 0;
+    }
+
+    // Verify that the uri can be parsed
+    if (!url.isValid()) {
+        m_backend->logMessage(QString("%1 is not a valid URI").arg(url.toString()));
+        return false;
+    }
+
+    // Create a new datasource based on the input URL
+    QByteArray encoded_cstr_url = url.toEncoded();
+    m_datasource = gst_element_make_from_uri(GST_URI_SRC, encoded_cstr_url.constData(), (const char*)NULL);
+    if (!m_datasource)
+        return false;
+
+    // Link data source into pipeline
+    gst_bin_add(GST_BIN(m_pipeline), m_datasource);
+    if (!gst_element_link(m_datasource, m_decodebin)) {
+        // For sources with dynamic pads (such as RtspSrc) we need to connect dynamically
+        GstPad *decodepad = gst_element_get_pad (m_decodebin, "sink");
+        g_signal_connect (m_datasource, "pad-added", G_CALLBACK (&cb_pad_added), decodepad);
+    }
+
+    return true;
+}
+
+/**
+ * Create a media source from a media stream
+ *
+ * returns true if successful
+ */
+bool MediaObject::createPipefromStream(const MediaSource &source)
+{
+    // Remove any existing data source
+    if (m_datasource) {
+        gst_bin_remove(GST_BIN(m_pipeline), m_datasource);
+        // m_pipeline has the only ref to datasource
+        m_datasource = 0;
+    }
+
+    m_datasource = GST_ELEMENT(g_object_new(phonon_src_get_type(), NULL));
+    if (!m_datasource)
+        return false;
+
+    StreamReader *streamReader = new StreamReader(source);
+    g_object_set (G_OBJECT (m_datasource), "iodevice", streamReader, (const char*)NULL);
+
+    // Link data source into pipeline
+    gst_bin_add(GST_BIN(m_pipeline), m_datasource);
+    if (!gst_element_link(m_datasource, m_decodebin)) {
+        gst_bin_remove(GST_BIN(m_pipeline), m_datasource);
+        return false;
+    }
+    return true;
+}
+
+void MediaObject::createPipeline()
+{
+    m_pipeline = gst_pipeline_new (NULL);
+    gst_object_ref (GST_OBJECT (m_pipeline));
+    gst_object_sink (GST_OBJECT (m_pipeline));
+
+    m_decodebin = gst_element_factory_make ("decodebin", NULL);
+    g_signal_connect (m_decodebin, "new-decoded-pad", G_CALLBACK (&cb_newpad), this);
+    g_signal_connect (m_decodebin, "unknown-type", G_CALLBACK (&cb_unknown_type), this);
+    g_signal_connect (m_decodebin, "no-more-pads", G_CALLBACK (&cb_no_more_pads), this);
+
+    gst_bin_add(GST_BIN(m_pipeline), m_decodebin);
+
+    // Create a bin to contain the gst elements for this medianode
+
+    // Set up audio graph
+    m_audioGraph = gst_bin_new(NULL);
+    gst_object_ref (GST_OBJECT (m_audioGraph));
+    gst_object_sink (GST_OBJECT (m_audioGraph));
+
+    // Note that these queues are only required for streaming content
+    // And should ideally be created on demand as they will disable
+    // pull-mode access. Also note that the max-size-time are increased to
+    // reduce buffer overruns as these are not gracefully handled at the moment.
+    m_audioPipe = gst_element_factory_make("queue", NULL);
+    g_object_set(G_OBJECT(m_audioPipe), "max-size-time",  MAX_QUEUE_TIME, (const char*)NULL);
+    gst_bin_add(GST_BIN(m_audioGraph), m_audioPipe);
+    GstPad *audiopad = gst_element_get_pad (m_audioPipe, "sink");
+    gst_element_add_pad (m_audioGraph, gst_ghost_pad_new ("sink", audiopad));
+    gst_object_unref (audiopad);
+
+    // Set up video graph
+    m_videoGraph = gst_bin_new(NULL);
+    gst_object_ref (GST_OBJECT (m_videoGraph));
+    gst_object_sink (GST_OBJECT (m_videoGraph));
+
+    m_videoPipe = gst_element_factory_make("queue", NULL);
+    g_object_set(G_OBJECT(m_videoPipe), "max-size-time", MAX_QUEUE_TIME, (const char*)NULL);
+    gst_bin_add(GST_BIN(m_videoGraph), m_videoPipe);
+    GstPad *videopad = gst_element_get_pad (m_videoPipe, "sink");
+    gst_element_add_pad (m_videoGraph, gst_ghost_pad_new ("sink", videopad));
+    gst_object_unref (videopad);
+
+    if (m_pipeline && m_decodebin && m_audioGraph && m_videoGraph && m_audioPipe && m_videoPipe)
+        m_isValid = true;
+    else
+        m_backend->logMessage("Could not create pipeline for media object", Backend::Warning);
+}
+
+/**
+ * !reimp
+ */
+State MediaObject::state() const
+{
+    return m_state;
+}
+
+/**
+ * !reimp
+ */
+bool MediaObject::hasVideo() const
+{
+    return m_hasVideo;
+}
+
+/**
+ * !reimp
+ */
+bool MediaObject::isSeekable() const
+{
+    return m_seekable;
+}
+
+/**
+ * !reimp
+ */
+qint64 MediaObject::currentTime() const
+{
+    if (m_resumeState)
+        return m_oldPos;
+
+    switch (state()) {
+    case Phonon::PausedState:
+    case Phonon::BufferingState:
+    case Phonon::PlayingState:
+        return getPipelinePos();
+    case Phonon::StoppedState:
+    case Phonon::LoadingState:
+        return 0;
+    case Phonon::ErrorState:
+        break;
+    }
+    return -1;
+}
+
+/**
+ * !reimp
+ */
+qint32 MediaObject::tickInterval() const
+{
+    return m_tickInterval;
+}
+
+/**
+ * !reimp
+ */
+void MediaObject::setTickInterval(qint32 newTickInterval)
+{
+    m_tickInterval = newTickInterval;
+    if (m_tickInterval <= 0)
+        m_tickTimer->setInterval(50);
+    else
+        m_tickTimer->setInterval(newTickInterval);
+}
+
+/**
+ * !reimp
+ */
+void MediaObject::play()
+{
+    setState(Phonon::PlayingState);
+    m_resumeState = false;
+}
+
+/**
+ * !reimp
+ */
+QString MediaObject::errorString() const
+{
+    return m_errorString;
+}
+
+/**
+ * !reimp
+ */
+Phonon::ErrorType MediaObject::errorType() const
+{
+    return m_error;
+}
+
+/**
+ * Set the current state of the mediaObject.
+ *
+ * !### Note that both Playing and Paused states are set immediately
+ *     This should obviously be done in response to actual gstreamer state changes
+ */
+void MediaObject::setState(State newstate)
+{
+    if (!isValid())
+        return;
+
+    if (m_state == newstate)
+        return;
+
+    if (m_loading) {
+        // We are still loading. The state will be requested
+        // when loading has completed.
+        m_pendingState = newstate;
+        return;
+    }
+
+    GstState currentState;
+    gst_element_get_state (m_pipeline, &currentState, NULL, 1000);
+
+    switch (newstate) {
+    case Phonon::BufferingState:
+        m_backend->logMessage("phonon state request: buffering", Backend::Info, this);
+        break;
+
+    case Phonon::PausedState:
+        m_backend->logMessage("phonon state request: paused", Backend::Info, this);
+        if (currentState == GST_STATE_PAUSED) {
+            changeState(Phonon::PausedState);
+        } else if (gst_element_set_state(m_pipeline, GST_STATE_PAUSED) != GST_STATE_CHANGE_FAILURE) {
+            m_pendingState = Phonon::PausedState;
+        } else {
+            m_backend->logMessage("phonon state request failed", Backend::Info, this);
+        }
+        break;
+
+    case Phonon::StoppedState:
+        m_backend->logMessage("phonon state request: Stopped", Backend::Info, this);
+        if (currentState == GST_STATE_READY) {
+            changeState(Phonon::StoppedState);
+        } else if (gst_element_set_state(m_pipeline, GST_STATE_READY) != GST_STATE_CHANGE_FAILURE) {
+            m_pendingState = Phonon::StoppedState;
+        } else {
+            m_backend->logMessage("phonon state request failed", Backend::Info, this);
+        }
+        m_atEndOfStream = false;
+        break;
+
+    case Phonon::PlayingState:
+       if (m_resetNeeded) {
+            // ### Note this is a workaround and it should really be gracefully
+            // handled by medianode when we implement live connections.
+            // This generally happens if medianodes have been connected after the MediaSource was set
+            // Note that a side-effect of this is that we resend all meta data.
+            gst_element_set_state(m_pipeline, GST_STATE_NULL);
+            m_resetNeeded = false;
+            // Send a source change so the X11 renderer
+            // will re-set the overlay
+            MediaNodeEvent event(MediaNodeEvent::SourceChanged);
+            notify(&event);
+        }
+        m_backend->logMessage("phonon state request: Playing", Backend::Info, this);
+        if (m_atEndOfStream) {
+            m_backend->logMessage("EOS already reached", Backend::Info, this);
+        } else if (currentState == GST_STATE_PLAYING) {
+            changeState(Phonon::PlayingState);
+        } else if (!m_atEndOfStream && gst_element_set_state(m_pipeline, GST_STATE_PLAYING) != GST_STATE_CHANGE_FAILURE) {
+            m_pendingState = Phonon::PlayingState;
+        } else {
+            m_backend->logMessage("phonon state request failed", Backend::Info, this);
+        }
+        break;
+
+    case Phonon::ErrorState:
+        m_backend->logMessage("phonon state request : Error", Backend::Warning, this);
+        m_backend->logMessage(QString("Last error : %0").arg(errorString()) , Backend::Warning, this);
+        changeState(Phonon::ErrorState); //immediately set error state
+        break;
+
+    case Phonon::LoadingState:
+        m_backend->logMessage("phonon state request: Loading", Backend::Info, this);
+        changeState(Phonon::LoadingState);
+        break;
+    }
+}
+
+/*
+ * Signals that the requested state has completed
+ * by emitting stateChanged and updates the internal state.
+ */
+void MediaObject::changeState(State newstate)
+{
+    if (newstate == m_state)
+        return;
+
+    Phonon::State oldState = m_state;
+    m_state = newstate; // m_state must be set before emitting, since 
+                        // Error state requires that state() will return the new value
+    m_pendingState = newstate;
+    emit stateChanged(newstate, oldState);
+
+    switch (newstate) {
+    case Phonon::PausedState:
+        m_backend->logMessage("phonon state changed: paused", Backend::Info, this);
+        break;
+
+    case Phonon::BufferingState:
+        m_backend->logMessage("phonon state changed: buffering", Backend::Info, this);
+        break;
+
+    case Phonon::PlayingState:
+        m_backend->logMessage("phonon state changed: Playing", Backend::Info, this);
+        break;
+
+    case Phonon::StoppedState:
+        m_backend->logMessage("phonon state changed: Stopped", Backend::Info, this);
+        m_tickTimer->stop();
+        break;
+
+    case Phonon::ErrorState:
+        m_loading = false;
+        m_backend->logMessage("phonon state changed : Error", Backend::Info, this);
+        m_backend->logMessage(errorString(), Backend::Warning, this);
+        break;
+
+    case Phonon::LoadingState:
+        m_backend->logMessage("phonon state changed: Loading", Backend::Info, this);
+        break;
+    }
+}
+
+void MediaObject::setError(const QString &errorString, Phonon::ErrorType error)
+{
+    m_errorString = errorString;
+    m_error = error;
+    m_tickTimer->stop();
+
+    if (error == Phonon::FatalError) {
+        m_hasVideo = false;
+        emit hasVideoChanged(false);
+        gst_element_set_state(m_pipeline, GST_STATE_READY);
+        changeState(Phonon::ErrorState);
+    } else {
+        if (m_loading) //Flag error only after loading has completed
+            m_pendingState = Phonon::ErrorState;
+        else
+            changeState(Phonon::ErrorState);
+    }
+}
+
+qint64 MediaObject::totalTime() const
+{
+    return m_totalTime;
+}
+
+qint32 MediaObject::prefinishMark() const
+{
+    return m_prefinishMark;
+}
+
+qint32 MediaObject::transitionTime() const
+{
+    return m_transitionTime;
+}
+
+void MediaObject::setTransitionTime(qint32 time)
+{
+    m_transitionTime = time;
+}
+
+qint64 MediaObject::remainingTime() const
+{
+    return totalTime() - currentTime();
+}
+
+MediaSource MediaObject::source() const
+{
+    return m_source;
+}
+
+void MediaObject::setNextSource(const MediaSource &source)
+{
+    if (source.type() == MediaSource::Invalid &&
+        source.type() == MediaSource::Empty)
+        return;
+    m_nextSource = source;
+}
+
+/**
+ * Update total time value from the pipeline
+ */
+bool MediaObject::updateTotalTime()
+{
+    GstFormat   format = GST_FORMAT_TIME;
+    gint64 duration = 0;
+    if (gst_element_query_duration (GST_ELEMENT(m_pipeline), &format, &duration)) {
+        setTotalTime(duration / GST_MSECOND);
+        return true;
+    }
+    return false;
+}
+
+/**
+ * Checks if the current source is seekable
+ */
+void MediaObject::updateSeekable()
+{
+    if (!isValid())
+        return;
+
+    GstQuery *query;
+    gboolean result;
+    gint64 start, stop;
+    query = gst_query_new_seeking(GST_FORMAT_TIME);
+    result = gst_element_query (m_pipeline, query);
+    if (result) {
+        gboolean seekable;
+        GstFormat format;
+        gst_query_parse_seeking (query, &format, &seekable, &start, &stop);
+
+        if (m_seekable != seekable) {
+            m_seekable = seekable;
+            emit seekableChanged(m_seekable);
+        }
+
+        if (m_seekable)
+            m_backend->logMessage("Stream is seekable", Backend::Info, this);
+        else
+            m_backend->logMessage("Stream is non-seekable", Backend::Info, this);
+    } else {
+        m_backend->logMessage("updateSeekable query failed", Backend::Info, this);
+    }
+    gst_query_unref (query);
+}
+
+qint64 MediaObject::getPipelinePos() const
+{
+    Q_ASSERT(m_pipeline);
+
+    // Note some formats (usually mpeg) do not allow us to accurately seek to the
+    // beginning or end of the file so we 'fake' it here rather than exposing the front end to potential issues.
+    if (m_atEndOfStream)
+        return totalTime();
+    if (m_atStartOfStream)
+        return 0;
+    if (m_posAtSeek >= 0)
+        return m_posAtSeek;
+
+    gint64 pos = 0;
+    GstFormat format = GST_FORMAT_TIME;
+    gst_element_query_position (GST_ELEMENT(m_pipeline), &format, &pos);
+    return (pos / GST_MSECOND);
+}
+
+/*
+ * Internal method to set a new total time for the media object
+ */
+void MediaObject::setTotalTime(qint64 newTime)
+{
+
+    if (newTime == m_totalTime)
+        return;
+
+    m_totalTime = newTime;
+
+    emit totalTimeChanged(m_totalTime);
+}
+
+/*
+ * !reimp
+ */
+void MediaObject::setSource(const MediaSource &source)
+{
+    if (!isValid())
+        return;
+
+    // We have to reset the state completely here, otherwise
+    // remnants of the old pipeline can result in strangenes
+    // such as failing duration queries etc
+    GstState state;
+    gst_element_set_state(m_pipeline, GST_STATE_NULL);
+    gst_element_get_state (m_pipeline, &state, NULL, 2000);
+
+    m_source = source;
+    emit currentSourceChanged(m_source);
+    m_previousTickTime = -1;
+    m_missingCodecs.clear();
+
+    // Go into to loading state
+    changeState(Phonon::LoadingState);
+    m_loading = true;
+    m_resetNeeded = false;
+    m_resumeState = false;
+    m_pendingState = Phonon::StoppedState;
+
+     // Make sure we start out unconnected
+    if (GST_ELEMENT_PARENT(m_audioGraph))
+        gst_bin_remove(GST_BIN(m_pipeline), m_audioGraph);
+    if (GST_ELEMENT_PARENT(m_videoGraph))
+        gst_bin_remove(GST_BIN(m_pipeline), m_videoGraph);
+
+    // Clear any existing errors
+    m_aboutToFinishEmitted = false;
+    m_error = NoError;
+    m_errorString = QString();
+    
+    m_bufferPercent = 0;
+    m_prefinishMarkReachedNotEmitted = true;
+    m_aboutToFinishEmitted = false;
+    m_hasAudio = false;
+    m_videoStreamFound = false;
+    setTotalTime(-1);
+    m_atEndOfStream = false;
+
+    // Clear exising meta tags
+    m_metaData.clear();
+
+    switch (source.type()) {
+    case MediaSource::Url: {            
+            if (createPipefromURL(source.url()))
+                m_loading = true;
+            else
+                setError(tr("Could not open media source."));
+        }
+        break;
+
+    case MediaSource::LocalFile: {
+            if (createPipefromURL(QUrl::fromLocalFile(source.fileName())))
+                m_loading = true;
+            else
+                setError(tr("Could not open media source."));
+        }
+        break;
+
+    case MediaSource::Invalid:
+        setError(tr("Invalid source type."), Phonon::NormalError);
+        break;
+
+    case MediaSource::Empty:
+        break;
+
+    case MediaSource::Stream:
+        if (createPipefromStream(source))
+            m_loading = true;
+        else
+            setError(tr("Could not open media source."));
+        break;
+
+    case MediaSource::Disc: // CD tracks can be specified by setting the url in the following way uri=cdda:4
+        m_backend->logMessage("Source type Disc not currently supported", Backend::Warning, this);
+        setError(tr("Could not open media source."), Phonon::NormalError);
+        break;
+
+    default:
+        m_backend->logMessage("Source type not currently supported", Backend::Warning, this);
+        setError(tr("Could not open media source."), Phonon::NormalError);
+        break;
+    }
+
+    MediaNodeEvent event(MediaNodeEvent::SourceChanged);
+    notify(&event);
+
+    // We need to link this node to ensure that fake sinks are connected
+    // before loading, otherwise the stream will be blocked
+    if (m_loading)
+        link();
+    beginLoad();
+}
+
+void MediaObject::beginLoad()
+{
+    if (gst_element_set_state(m_pipeline, GST_STATE_PAUSED) != GST_STATE_CHANGE_FAILURE) {
+        m_backend->logMessage("Begin source load", Backend::Info, this);
+    } else {
+        setError(tr("Could not open media source."));
+    }
+}
+
+// Called when we are ready to leave the loading state
+void MediaObject::loadingComplete()
+{
+    if (m_videoStreamFound) {
+        MediaNodeEvent event(MediaNodeEvent::VideoAvailable);
+        notify(&event);
+    }
+    getStreamInfo();
+    m_loading = false;
+
+    setState(m_pendingState);
+    emit metaDataChanged(m_metaData);
+}
+
+void MediaObject::getStreamInfo()
+{
+    updateSeekable();
+    updateTotalTime();
+
+    if (m_videoStreamFound != m_hasVideo) {
+        m_hasVideo = m_videoStreamFound;
+        emit hasVideoChanged(m_hasVideo);
+    }
+}
+
+void MediaObject::setPrefinishMark(qint32 newPrefinishMark)
+{
+    m_prefinishMark = newPrefinishMark;
+    if (currentTime() < totalTime() - m_prefinishMark) // not about to finish
+        m_prefinishMarkReachedNotEmitted = true;
+}
+
+void MediaObject::pause()
+{
+    m_backend->logMessage("pause()", Backend::Info, this);
+    if (state() != Phonon::PausedState)
+        setState(Phonon::PausedState);
+    m_resumeState = false;
+}
+
+void MediaObject::stop()
+{
+    if (state() != Phonon::StoppedState) {
+        setState(Phonon::StoppedState);
+        m_prefinishMarkReachedNotEmitted = true;
+    }
+    m_resumeState = false;
+}
+
+void MediaObject::seek(qint64 time)
+{
+    if (!isValid())
+        return;
+
+    if (isSeekable()) {
+        switch (state()) {
+        case Phonon::PlayingState:
+        case Phonon::StoppedState:
+        case Phonon::PausedState:
+        case Phonon::BufferingState:
+            m_backend->logMessage(QString("Seek to pos %0").arg(time), Backend::Info, this);
+
+            if (time <= 0)
+                m_atStartOfStream = true;
+            else
+                m_atStartOfStream = false;
+
+            m_posAtSeek = getPipelinePos();
+            m_tickTimer->stop();
+
+            if (gst_element_seek(m_pipeline, 1.0, GST_FORMAT_TIME,
+                                 GST_SEEK_FLAG_FLUSH, GST_SEEK_TYPE_SET,
+                                 time * GST_MSECOND, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
+            break;
+        case Phonon::LoadingState:
+        case Phonon::ErrorState:
+            return;
+        }
+
+        quint64 current = currentTime();
+        quint64 total = totalTime(); 
+
+        if (current < total - m_prefinishMark)
+            m_prefinishMarkReachedNotEmitted = true;
+        if (current < total - ABOUT_TO_FINNISH_TIME)
+            m_aboutToFinishEmitted = false;
+        m_atEndOfStream = false;
+    }
+}
+
+void MediaObject::emitTick()
+{
+    if (m_resumeState) {
+        return;
+    }
+
+    qint64 currentTime = getPipelinePos();
+    qint64 totalTime = m_totalTime;
+
+    if (m_tickInterval > 0 && currentTime != m_previousTickTime) {
+        emit tick(currentTime);
+        m_previousTickTime = currentTime;        
+    }
+    if (m_state == Phonon::PlayingState) {
+        if (currentTime >= totalTime - m_prefinishMark) {
+            if (m_prefinishMarkReachedNotEmitted) {
+                m_prefinishMarkReachedNotEmitted = false;
+                emit prefinishMarkReached(totalTime - currentTime);
+            }
+        }
+        // Prepare load of next source
+        if (currentTime >= totalTime - ABOUT_TO_FINNISH_TIME) {
+            if (!m_aboutToFinishEmitted) {
+                m_aboutToFinishEmitted = true; // track is about to finish
+                emit aboutToFinish();
+            }
+        }
+    }
+}
+
+
+/*
+ * Used to iterate through the gst_tag_list and extract values
+ */
+void foreach_tag_function(const GstTagList *list, const gchar *tag, gpointer user_data)
+{
+    TagMap *newData = static_cast<TagMap *>(user_data);
+    QString value;
+    GType type = gst_tag_get_type(tag);
+    switch (type) {
+    case G_TYPE_STRING: {
+            char *str = 0;
+            gst_tag_list_get_string(list, tag, &str);
+            value = QString::fromUtf8(str);
+            g_free(str);
+        }
+        break;
+
+    case G_TYPE_BOOLEAN: {
+            int bval;
+            gst_tag_list_get_boolean(list, tag, &bval);
+            value = QString::number(bval);
+        }
+        break;
+
+    case G_TYPE_INT: {
+            int ival;
+            gst_tag_list_get_int(list, tag, &ival);
+            value = QString::number(ival);
+        }
+        break;
+
+    case G_TYPE_UINT: {
+            unsigned int uival;
+            gst_tag_list_get_uint(list, tag, &uival);
+            value = QString::number(uival);
+        }
+        break;
+
+    case G_TYPE_FLOAT: {
+            float fval;
+            gst_tag_list_get_float(list, tag, &fval);
+            value = QString::number(fval);
+        }
+        break;
+
+    case G_TYPE_DOUBLE: {
+            double dval;
+            gst_tag_list_get_double(list, tag, &dval);
+            value = QString::number(dval);
+        }
+        break;
+
+    default:
+        //qDebug("Unsupported tag type: %s", g_type_name(type));
+        break;
+    }
+
+    QString key = QString(tag).toUpper();
+    QString currVal = newData->value(key);
+    if (!value.isEmpty() && !(newData->contains(key) && currVal == value))
+        newData->insert(key, value);
+}
+
+/**
+ * Triggers playback after a song has completed in the current media queue
+ */
+void MediaObject::beginPlay()
+{
+    setSource(m_nextSource);
+    m_nextSource = MediaSource();
+    m_pendingState = Phonon::PlayingState;
+}
+
+/**
+ * Handle GStreamer bus messages
+ */
+void MediaObject::handleBusMessage(const Message &message)
+{
+
+    if (!isValid())
+        return;
+
+    GstMessage *gstMessage = message.rawMessage();
+    Q_ASSERT(m_pipeline);
+
+    if (m_backend->debugLevel() >= Backend::Debug) {
+        int type = GST_MESSAGE_TYPE(gstMessage);
+        gchar* name = gst_element_get_name(gstMessage->src);
+        QString msgString = QString("Bus: %0 (%1)").arg(gst_message_type_get_name ((GstMessageType)type)).arg(name);
+        g_free(name);
+        m_backend->logMessage(msgString, Backend::Debug, this);
+    }
+
+    switch (GST_MESSAGE_TYPE (gstMessage)) {
+
+    case GST_MESSAGE_EOS: 
+        m_backend->logMessage("EOS recieved", Backend::Info, this);
+        handleEndOfStream();
+        break;
+
+    case GST_MESSAGE_TAG: {
+            GstTagList* tag_list = 0;
+            gst_message_parse_tag(gstMessage, &tag_list);
+            if (tag_list) {
+                TagMap oldMap = m_metaData; // Keep a copy of the old one for reference
+                // Append any new meta tags to the existing tag list
+                gst_tag_list_foreach (tag_list, &foreach_tag_function, &m_metaData);
+                m_backend->logMessage("Meta tags found", Backend::Info, this);
+                if (oldMap != m_metaData && !m_loading)
+                    emit metaDataChanged(m_metaData);
+                gst_tag_list_free(tag_list);
+            }
+        }
+        break;
+
+    case GST_MESSAGE_STATE_CHANGED : {
+
+            if (gstMessage->src != GST_OBJECT(m_pipeline))
+                return;
+
+            GstState oldState;
+            GstState newState;
+            GstState pendingState;
+            gst_message_parse_state_changed (gstMessage, &oldState, &newState, &pendingState);
+
+            if (newState == pendingState)
+                return;
+
+            m_posAtSeek = -1;
+
+            switch (newState) {
+
+            case GST_STATE_PLAYING :
+                m_atStartOfStream = false;
+                m_backend->logMessage("gstreamer: pipeline state set to playing", Backend::Info, this);
+                m_tickTimer->start();
+                changeState(Phonon::PlayingState);
+                if (m_resumeState && m_oldState == Phonon::PlayingState) {
+                    seek(m_oldPos);
+                    m_resumeState = false;
+                }
+                break;
+
+            case GST_STATE_NULL:
+                m_backend->logMessage("gstreamer: pipeline state set to null", Backend::Info, this);
+                m_tickTimer->stop();
+                break;
+
+            case GST_STATE_PAUSED :
+                m_backend->logMessage("gstreamer: pipeline state set to paused", Backend::Info, this);
+                m_tickTimer->start();
+                if (state() == Phonon::LoadingState) {
+                    // No_more_pads is not emitted from the decodebin in older versions (0.10.4)
+                    noMorePadsAvailable();
+                    loadingComplete();
+                } else if (m_resumeState && m_oldState == Phonon::PausedState) {
+                    changeState(Phonon::PausedState);
+                    m_resumeState = false;
+                    break;
+                } else {
+                    // A lot of autotests can break if we allow all paused changes through.
+                    if (m_pendingState == Phonon::PausedState) {
+                        changeState(Phonon::PausedState);
+                    }
+                }
+                break;
+
+            case GST_STATE_READY :
+                if (!m_loading && m_pendingState == Phonon::StoppedState)
+                    changeState(Phonon::StoppedState);
+                m_backend->logMessage("gstreamer: pipeline state set to ready", Backend::Debug, this);
+                m_tickTimer->stop();
+                break;
+
+            case GST_STATE_VOID_PENDING :
+                m_backend->logMessage("gstreamer: pipeline state set to pending (void)", Backend::Debug, this);
+                m_tickTimer->stop();
+                break;
+            }
+            break;
+        }
+
+    case GST_MESSAGE_ERROR: {
+            gchar *debug;
+            GError *err;
+            QString logMessage;
+            gst_message_parse_error (gstMessage, &err, &debug);
+            gchar *errorMessage = gst_error_get_message (err->domain, err->code);
+            logMessage.sprintf("Error: %s Message:%s (%s) Code:%d", debug, err->message, errorMessage, err->code);
+            m_backend->logMessage(logMessage, Backend::Warning);
+            g_free(errorMessage);
+            g_free (debug);
+
+            if (err->domain == GST_RESOURCE_ERROR) {
+                if (err->code == GST_RESOURCE_ERROR_NOT_FOUND) {
+                    setError(tr("Could not locate media source."), Phonon::FatalError);
+                } else if (err->code == GST_RESOURCE_ERROR_OPEN_READ) {
+                    setError(tr("Could not open media source."), Phonon::FatalError);
+                } else if (err->code == GST_RESOURCE_ERROR_BUSY) {
+                   // We need to check if this comes from an audio device by looking at sink caps
+                   GstPad* sinkPad = gst_element_get_static_pad(GST_ELEMENT(gstMessage->src), "sink");
+                   if (sinkPad) {
+                        GstCaps *caps = gst_pad_get_caps (sinkPad);
+                        GstStructure *str = gst_caps_get_structure (caps, 0);
+                        if (g_strrstr (gst_structure_get_name (str), "audio"))
+                            setError(tr("Could not open audio device. The device is already in use."), Phonon::NormalError);
+                        else
+                            setError(err->message, Phonon::FatalError);
+                        gst_caps_unref (caps);
+                        gst_object_unref (sinkPad);
+                   } 
+               } else {
+                    setError(QString(err->message), Phonon::FatalError);
+               }
+           } else if (err->domain == GST_STREAM_ERROR) {
+                switch (err->code) {
+                case GST_STREAM_ERROR_WRONG_TYPE:
+                case GST_STREAM_ERROR_TYPE_NOT_FOUND:
+                    setError(tr("Could not decode media source."), Phonon::FatalError);
+                    break;
+                default:
+                    setError(tr("Could not open media source."), Phonon::FatalError);
+                    break;
+                }
+           } else {
+                setError(QString(err->message), Phonon::FatalError);
+            }
+            g_error_free (err);
+            break;
+        }
+
+    case GST_MESSAGE_WARNING: {
+            gchar *debug;
+            GError *err;
+            gst_message_parse_warning(gstMessage, &err, &debug);
+            QString msgString;
+            msgString.sprintf("Warning: %s\nMessage:%s", debug, err->message);
+            m_backend->logMessage(msgString, Backend::Warning);
+            g_free (debug);
+            g_error_free (err);
+            break;
+        }
+
+    case GST_MESSAGE_ELEMENT: {
+            GstMessage *gstMessage = message.rawMessage();
+            const GstStructure *gstStruct = gst_message_get_structure(gstMessage); //do not free this
+            if (g_strrstr (gst_structure_get_name (gstStruct), "prepare-xwindow-id")) {
+                MediaNodeEvent videoHandleEvent(MediaNodeEvent::VideoHandleRequest);
+                notify(&videoHandleEvent);
+            }
+            break;
+        }
+
+    case GST_MESSAGE_DURATION: {
+            m_backend->logMessage("GST_MESSAGE_DURATION", Backend::Debug, this);
+            updateTotalTime();
+            break;
+        }
+
+    case GST_MESSAGE_BUFFERING: {
+            gint percent = 0;
+            gst_structure_get_int (gstMessage->structure, "buffer-percent", &percent); //gst_message_parse_buffering was introduced in 0.10.11
+
+            if (m_bufferPercent != percent) {
+                emit bufferStatus(percent);
+                m_backend->logMessage(QString("Stream buffering %0").arg(percent), Backend::Debug, this);
+                m_bufferPercent = percent;
+            }
+
+            if (m_state != Phonon::BufferingState)
+                emit stateChanged(m_state, Phonon::BufferingState);
+            else if (percent == 100)
+                emit stateChanged(Phonon::BufferingState, m_state);
+            break;
+        }
+        //case GST_MESSAGE_INFO:
+        //case GST_MESSAGE_STREAM_STATUS:
+        //case GST_MESSAGE_CLOCK_PROVIDE:
+        //case GST_MESSAGE_NEW_CLOCK:
+        //case GST_MESSAGE_STEP_DONE:
+        //case GST_MESSAGE_LATENCY: only from 0.10.12
+        //case GST_MESSAGE_ASYNC_DONE: only from 0.10.13
+    default: 
+        break; 
+    }
+}
+
+void MediaObject::handleEndOfStream()
+{
+    // If the stream is not seekable ignore
+    // otherwise chained radio broadcasts would stop
+
+
+    if (m_atEndOfStream)
+        return;
+
+    if (!m_seekable)
+        m_atEndOfStream = true;
+
+    if (m_nextSource.type() != MediaSource::Invalid
+        && m_nextSource.type() != MediaSource::Empty) {  // We only emit finish when the queue is actually empty
+        QTimer::singleShot (qMax(0, transitionTime()), this, SLOT(beginPlay()));
+    } else {
+        m_pendingState = Phonon::PausedState;
+        emit finished();
+        if (!m_seekable) {
+            setState(Phonon::StoppedState);
+            // Note the behavior for live streams is not properly defined
+            // But since we cant seek to 0, we don't have much choice other than stopping
+            // the stream
+        } else {
+            // Only emit paused if the finished signal
+            // did not result in a new state
+            if (m_pendingState == Phonon::PausedState)
+                setState(m_pendingState);
+        }
+    }
+}
+
+// Notifes the pipeline about state changes in the media object
+void MediaObject::notifyStateChange(Phonon::State newstate, Phonon::State oldstate)
+{
+    Q_UNUSED(oldstate);
+    MediaNodeEvent event(MediaNodeEvent::StateChanged, &newstate);
+    notify(&event);
+}
+
+} // ns Gstreamer
+} // ns Phonon
+
+QT_END_NAMESPACE
+
+#include "moc_mediaobject.cpp"