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/*
Copyright (C) 2010 Marco Ballesio <gibrovacco@gmail.com>
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 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "player.h"
#include <iostream>
#include <QtCore/QTime>
#include <QtCore/QDir>
#include <QtGui/QApplication>
#include <QGlib/Signal>
#include <QGst/Global>
#include <QGst/Pipeline>
#include <QGst/ElementFactory>
#include <QGst/XOverlay>
#include <QGst/Bus>
#include <QGst/Message>
#include <QGst/Query>
#include <QGst/Clock>
#include <QGst/Event>
/* This is a simple example of a command-line player. It accepts the URI of
* a media file as the first command line argument and then constructs a pipeline
* that uses playbin2 to decode the stream. */
Player::Player(QWidget *parent)
: QGst::Ui::VideoWidget(parent)
{
connect(&m_positionTimer, SIGNAL(timeout()), this, SLOT(updatePosition()));
setMouseTracking(true);
}
void Player::setUri(const QString & uri)
{
QString realUri = uri;
if (uri.indexOf("://") < 0) {
if (realUri[0] != '/') {
realUri = QDir::current().path() + "/" + realUri;
}
realUri = "file://" + realUri;
}
if (!m_pipeline) {
QGst::ElementPtr playbin = QGst::ElementFactory::make("playbin2");
if (playbin) {
m_pipeline = playbin.dynamicCast<QGst::Pipeline>();
QGst::BusPtr bus = m_pipeline->bus();
QGlib::Signal::connect(bus, "message", this, &Player::busMessage);
bus->addSignalWatch();
}
}
if (m_pipeline) {
m_pipeline->setProperty("uri", realUri);
}
}
Player::~Player()
{
if (m_pipeline) {
m_pipeline->setState(QGst::StateNull);
}
}
void Player::updatePosition()
{
Q_EMIT positionChanged(position());
}
void Player::play()
{
if (m_pipeline) {
m_pipeline->setState(QGst::StatePlaying);
}
}
void Player::pause()
{
if (m_pipeline) {
m_pipeline->setState(QGst::StatePaused);
}
}
void Player::stop()
{
if (m_pipeline) {
m_pipeline->setState(QGst::StateReady);
}
}
void Player::setPosition(QTime pos)
{
QGst::SeekEventPtr evt = QGst::SeekEvent::create(
1.0, QGst::FormatTime, QGst::SeekFlagFlush,
QGst::SeekTypeSet, QGst::Clock::clockTimeFromTime(pos),
QGst::SeekTypeNone, -1);
m_pipeline->sendEvent(evt);
}
QTime Player::position()
{
if (m_pipeline) {
QGst::PositionQueryPtr query = QGst::PositionQuery::create(QGst::FormatTime);
m_pipeline->query(query);
return QGst::Clock::timeFromClockTime(query->position());
}
return QTime(0, 0, 0, 0);
}
QTime Player::length()
{
if (m_pipeline) {
QGst::DurationQueryPtr query = QGst::DurationQuery::create(QGst::FormatTime);
m_pipeline->query(query);
return QGst::Clock::timeFromClockTime(query->duration());
}
return QTime(0, 0, 0, 0);
}
QGst::State Player::state()
{
QGst::State state;
if (!m_pipeline ||
m_pipeline->getState(&state, NULL, 1e9) != QGst::StateChangeSuccess) {
state = QGst::StateNull;
}
return state;
}
void Player::handleStateChange(QGst::StateChangedMessagePtr scm)
{
switch (scm->newState()) {
case QGst::StatePlaying:
Q_EMIT positionChanged(position());
m_positionTimer.start(500);
break;
case QGst::StatePaused:
if (scm->oldState() == QGst::StateReady) {
QGst::ElementPtr sink =
m_pipeline->property("video-sink").get<QGst::ElementPtr>();
if (sink) {
setVideoSink(sink);
QGst::ChildProxyPtr proxy = sink.dynamicCast<QGst::ChildProxy>();
if (proxy) {
proxy->childByIndex(0)->setProperty("force-aspect-ratio", true);
}
}
} else
m_positionTimer.stop();
break;
case QGst::StateReady:
if (scm->oldState() == QGst::StatePaused) {
/* Remove the sink now to avoid inter-thread issues with Qt
for the next time the pipeline goes to StatePlaying */
setVideoSink(QGst::ElementPtr());
}
break;
default:
break;
}
}
void Player::busMessage(const QGst::MessagePtr & message)
{
switch (message->type()) {
case QGst::MessageEos: //End of stream. We reached the end of the file.
qDebug() << "got eos";
m_pipeline->setState(QGst::StateReady);
break;
case QGst::MessageError: //Some error occurred.
/*TODO: send a message to UI */
break;
case QGst::MessageStateChanged:
if (QGlib::Type::fromInstance(message->source()).
isA(QGlib::GetType<QGst::Pipeline>())) {
QGst::StateChangedMessagePtr scm =
message.dynamicCast<QGst::StateChangedMessage>();
handleStateChange(scm);
Q_EMIT stateChanged(scm->newState());
}
break;
default:
break;
}
}
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