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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** 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 <QDebug>
#include "qgstappsrc_p.h"
#include <QtNetwork>
QGstAppSrc::QGstAppSrc(QObject *parent)
:QObject(parent)
,m_stream(0)
,m_appSrc(0)
,m_sequential(false)
,m_maxBytes(0)
,m_setup(false)
,m_dataRequestSize(-1)
,m_dataRequested(false)
,m_enoughData(false)
,m_forceData(false)
{
m_callbacks.need_data = &QGstAppSrc::on_need_data;
m_callbacks.enough_data = &QGstAppSrc::on_enough_data;
m_callbacks.seek_data = &QGstAppSrc::on_seek_data;
}
QGstAppSrc::~QGstAppSrc()
{
if (m_appSrc)
gst_object_unref(G_OBJECT(m_appSrc));
}
bool QGstAppSrc::setup(GstElement* appsrc)
{
if (m_setup || m_stream == 0 || appsrc == 0)
return false;
m_appSrc = GST_APP_SRC(appsrc);
gst_app_src_set_callbacks(m_appSrc, (GstAppSrcCallbacks*)&m_callbacks, this, (GDestroyNotify)&QGstAppSrc::destroy_notify);
g_object_get(G_OBJECT(m_appSrc), "max-bytes", &m_maxBytes, NULL);
if (m_sequential)
m_streamType = GST_APP_STREAM_TYPE_STREAM;
else
m_streamType = GST_APP_STREAM_TYPE_RANDOM_ACCESS;
gst_app_src_set_stream_type(m_appSrc, m_streamType);
gst_app_src_set_size(m_appSrc, (m_sequential) ? -1 : m_stream->size());
return m_setup = true;
}
void QGstAppSrc::setStream(QIODevice *stream)
{
if (stream == 0)
return;
if (m_stream) {
disconnect(m_stream, SIGNAL(readyRead()), this, SLOT(onDataReady()));
disconnect(m_stream, SIGNAL(destroyed()), this, SLOT(streamDestroyed()));
}
if (m_appSrc)
gst_object_unref(G_OBJECT(m_appSrc));
m_dataRequestSize = -1;
m_dataRequested = false;
m_enoughData = false;
m_forceData = false;
m_maxBytes = 0;
m_appSrc = 0;
m_stream = stream;
connect(m_stream, SIGNAL(destroyed()), SLOT(streamDestroyed()));
connect(m_stream, SIGNAL(readyRead()), this, SLOT(onDataReady()));
m_sequential = m_stream->isSequential();
m_setup = false;
}
QIODevice *QGstAppSrc::stream() const
{
return m_stream;
}
GstAppSrc *QGstAppSrc::element()
{
return m_appSrc;
}
void QGstAppSrc::onDataReady()
{
if (!m_enoughData) {
m_dataRequested = true;
pushDataToAppSrc();
}
}
void QGstAppSrc::streamDestroyed()
{
if (sender() == m_stream) {
m_stream = 0;
sendEOS();
}
}
void QGstAppSrc::pushDataToAppSrc()
{
if (!isStreamValid() || !m_setup)
return;
if (m_dataRequested && !m_enoughData) {
qint64 size;
if (m_dataRequestSize == (unsigned int)-1)
size = qMin(m_stream->bytesAvailable(), queueSize());
else
size = qMin(m_stream->bytesAvailable(), (qint64)m_dataRequestSize);
void *data = g_malloc(size);
GstBuffer* buffer = gst_app_buffer_new(data, size, g_free, data);
buffer->offset = m_stream->pos();
qint64 bytesRead = m_stream->read((char*)GST_BUFFER_DATA(buffer), size);
buffer->offset_end = buffer->offset + bytesRead - 1;
if (bytesRead > 0) {
m_dataRequested = false;
m_enoughData = false;
GstFlowReturn ret = gst_app_src_push_buffer (GST_APP_SRC (element()), buffer);
if (ret == GST_FLOW_ERROR) {
qWarning()<<"appsrc: push buffer error";
} else if (ret == GST_FLOW_WRONG_STATE) {
qWarning()<<"appsrc: push buffer wrong state";
} else if (ret == GST_FLOW_RESEND) {
qWarning()<<"appsrc: push buffer resend";
}
}
// After reading we might be all done
if (m_stream->atEnd())
sendEOS();
} else if (m_stream->atEnd()) {
sendEOS();
}
}
bool QGstAppSrc::doSeek(qint64 value)
{
if (isStreamValid())
return stream()->seek(value);
return false;
}
gboolean QGstAppSrc::on_seek_data(GstAppSrc *element, guint64 arg0, gpointer userdata)
{
Q_UNUSED(element);
QGstAppSrc *self = reinterpret_cast<QGstAppSrc*>(userdata);
if (self && self->isStreamValid()) {
if (!self->stream()->isSequential())
QMetaObject::invokeMethod(self, "doSeek", Qt::AutoConnection, Q_ARG(qint64, arg0));
}
else
return false;
return true;
}
void QGstAppSrc::on_enough_data(GstAppSrc *element, gpointer userdata)
{
Q_UNUSED(element);
QGstAppSrc *self = reinterpret_cast<QGstAppSrc*>(userdata);
if (self)
self->enoughData() = true;
}
void QGstAppSrc::on_need_data(GstAppSrc *element, guint arg0, gpointer userdata)
{
Q_UNUSED(element);
QGstAppSrc *self = reinterpret_cast<QGstAppSrc*>(userdata);
if (self) {
self->dataRequested() = true;
self->enoughData() = false;
self->dataRequestSize()= arg0;
QMetaObject::invokeMethod(self, "pushDataToAppSrc", Qt::AutoConnection);
}
}
void QGstAppSrc::destroy_notify(gpointer data)
{
Q_UNUSED(data);
}
void QGstAppSrc::sendEOS()
{
gst_app_src_end_of_stream(GST_APP_SRC(m_appSrc));
if (isStreamValid() && !stream()->isSequential())
stream()->reset();
}
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