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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QGSTREAMERCAPTURESESSION_H
#define QGSTREAMERCAPTURESESSION_H
#include <qmediarecordercontrol.h>
#include <qmediarecorder.h>
#include <QtCore/qmutex.h>
#include <QtCore/qurl.h>
#include <gst/gst.h>
#include <private/qgstreamerbushelper_p.h>
QT_BEGIN_NAMESPACE
class QGstreamerMessage;
class QGstreamerBusHelper;
class QGstreamerAudioEncode;
class QGstreamerVideoEncode;
class QGstreamerImageEncode;
class QGstreamerRecorderControl;
class QGstreamerMediaContainerControl;
class QGstreamerVideoRendererInterface;
class QGstreamerAudioProbeControl;
class QGstreamerElementFactory
{
public:
virtual GstElement *buildElement() = 0;
virtual void prepareWinId() {}
};
class QGstreamerVideoInput : public QGstreamerElementFactory
{
public:
virtual QList<qreal> supportedFrameRates(const QSize &frameSize = QSize()) const = 0;
virtual QList<QSize> supportedResolutions(qreal frameRate = -1) const = 0;
};
class QGstreamerCaptureSession : public QObject, public QGstreamerBusMessageFilter
{
Q_OBJECT
Q_PROPERTY(qint64 duration READ duration NOTIFY durationChanged)
Q_ENUMS(State)
Q_ENUMS(CaptureMode)
Q_INTERFACES(QGstreamerBusMessageFilter)
public:
enum CaptureMode { Audio = 1,
Video = 2,
Image = 4,
AudioAndVideo = Audio | Video,
AudioAndVideoAndImage = Audio | Video | Image
};
enum State { StoppedState, PreviewState, PausedState, RecordingState };
QGstreamerCaptureSession(CaptureMode captureMode, QObject *parent);
~QGstreamerCaptureSession();
QGstreamerBusHelper *bus() { return m_busHelper; }
CaptureMode captureMode() const { return m_captureMode; }
void setCaptureMode(CaptureMode);
QUrl outputLocation() const;
bool setOutputLocation(const QUrl& sink);
QGstreamerAudioEncode *audioEncodeControl() const { return m_audioEncodeControl; }
QGstreamerVideoEncode *videoEncodeControl() const { return m_videoEncodeControl; }
QGstreamerImageEncode *imageEncodeControl() const { return m_imageEncodeControl; }
QGstreamerRecorderControl *recorderControl() const { return m_recorderControl; }
QGstreamerMediaContainerControl *mediaContainerControl() const { return m_mediaContainerControl; }
QGstreamerElementFactory *audioInput() const { return m_audioInputFactory; }
void setAudioInput(QGstreamerElementFactory *audioInput);
QGstreamerElementFactory *audioPreview() const { return m_audioPreviewFactory; }
void setAudioPreview(QGstreamerElementFactory *audioPreview);
QGstreamerVideoInput *videoInput() const { return m_videoInputFactory; }
void setVideoInput(QGstreamerVideoInput *videoInput);
QObject *videoPreview() const { return m_viewfinder; }
void setVideoPreview(QObject *viewfinder);
void captureImage(int requestId, const QString &fileName);
State state() const;
State pendingState() const;
qint64 duration() const;
bool isMuted() const { return m_muted; }
qreal volume() const { return m_volume; }
bool isReady() const;
bool processBusMessage(const QGstreamerMessage &message);
void addProbe(QGstreamerAudioProbeControl* probe);
void removeProbe(QGstreamerAudioProbeControl* probe);
static gboolean padAudioBufferProbe(GstPad *pad, GstBuffer *buffer, gpointer user_data);
signals:
void stateChanged(QGstreamerCaptureSession::State state);
void durationChanged(qint64 duration);
void error(int error, const QString &errorString);
void imageExposed(int requestId);
void imageCaptured(int requestId, const QImage &img);
void imageSaved(int requestId, const QString &path);
void mutedChanged(bool);
void volumeChanged(qreal);
void readyChanged(bool);
void viewfinderChanged();
public slots:
void setState(QGstreamerCaptureSession::State);
void setCaptureDevice(const QString &deviceName);
void dumpGraph(const QString &fileName);
void setMetaData(const QMap<QByteArray, QVariant>&);
void setMuted(bool);
void setVolume(qreal volume);
private:
enum PipelineMode { EmptyPipeline, PreviewPipeline, RecordingPipeline, PreviewAndRecordingPipeline };
GstElement *buildEncodeBin();
GstElement *buildAudioSrc();
GstElement *buildAudioPreview();
GstElement *buildVideoSrc();
GstElement *buildVideoPreview();
GstElement *buildImageCapture();
bool rebuildGraph(QGstreamerCaptureSession::PipelineMode newMode);
GstPad *getAudioProbePad();
void removeAudioBufferProbe();
void addAudioBufferProbe();
QUrl m_sink;
QString m_captureDevice;
State m_state;
State m_pendingState;
bool m_waitingForEos;
PipelineMode m_pipelineMode;
QGstreamerCaptureSession::CaptureMode m_captureMode;
QMap<QByteArray, QVariant> m_metaData;
QList<QGstreamerAudioProbeControl*> m_audioProbes;
QMutex m_audioProbeMutex;
int m_audioBufferProbeId;
QGstreamerElementFactory *m_audioInputFactory;
QGstreamerElementFactory *m_audioPreviewFactory;
QGstreamerVideoInput *m_videoInputFactory;
QObject *m_viewfinder;
QGstreamerVideoRendererInterface *m_viewfinderInterface;
QGstreamerAudioEncode *m_audioEncodeControl;
QGstreamerVideoEncode *m_videoEncodeControl;
QGstreamerImageEncode *m_imageEncodeControl;
QGstreamerRecorderControl *m_recorderControl;
QGstreamerMediaContainerControl *m_mediaContainerControl;
QGstreamerBusHelper *m_busHelper;
GstBus* m_bus;
GstElement *m_pipeline;
GstElement *m_audioSrc;
GstElement *m_audioTee;
GstElement *m_audioPreviewQueue;
GstElement *m_audioPreview;
GstElement *m_audioVolume;
gboolean m_muted;
double m_volume;
GstElement *m_videoSrc;
GstElement *m_videoTee;
GstElement *m_videoPreviewQueue;
GstElement *m_videoPreview;
GstElement *m_imageCaptureBin;
GstElement *m_encodeBin;
public:
bool m_passImage;
bool m_passPrerollImage;
QString m_imageFileName;
int m_imageRequestId;
};
QT_END_NAMESPACE
#endif // QGSTREAMERCAPTURESESSION_H
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