qt-everywhere-src-5.15.1/qtmultimedia/src/plugins/gstreamer/mediacapture/qgstreamercaptureservice.cpp

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#include "qgstreamercaptureservice.h"
#include "qgstreamercapturesession.h"
#include "qgstreamerrecordercontrol.h"
#include "qgstreamermediacontainercontrol.h"
#include "qgstreameraudioencode.h"
#include "qgstreamervideoencode.h"
#include "qgstreamerimageencode.h"
#include "qgstreamercameracontrol.h"
#include <private/qgstreamerbushelper_p.h>
#include "qgstreamercapturemetadatacontrol.h"

#if defined(USE_GSTREAMER_CAMERA)
#include "qgstreamerv4l2input.h"
#endif

#include "qgstreamerimagecapturecontrol.h"
#include <private/qgstreameraudioinputselector_p.h>
#include <private/qgstreamervideoinputdevicecontrol_p.h>
#include <private/qgstreameraudioprobecontrol_p.h>

#include <private/qgstreamervideorenderer_p.h>
#include <private/qgstreamervideowindow_p.h>

#if defined(HAVE_WIDGETS)
#include <private/qgstreamervideowidget_p.h>
#endif

#include <qmediaserviceproviderplugin.h>

QT_BEGIN_NAMESPACE

QGstreamerCaptureService::QGstreamerCaptureService(const QString &service, QObject *parent)
    : QMediaService(parent)
    , m_captureSession(0)
    , m_cameraControl(0)
#if defined(USE_GSTREAMER_CAMERA)
    , m_videoInput(0)
#endif
    , m_metaDataControl(0)
    , m_audioInputSelector(0)
    , m_videoInputDevice(0)
    , m_videoOutput(0)
    , m_videoRenderer(0)
    , m_videoWindow(0)
#if defined(HAVE_WIDGETS)
    , m_videoWidgetControl(0)
#endif
    , m_imageCaptureControl(0)
    , m_audioProbeControl(0)
{
    if (service == Q_MEDIASERVICE_AUDIOSOURCE) {
        m_captureSession = new QGstreamerCaptureSession(QGstreamerCaptureSession::Audio, this);
    }

#if defined(USE_GSTREAMER_CAMERA)
   if (service == Q_MEDIASERVICE_CAMERA) {
        m_captureSession = new QGstreamerCaptureSession(QGstreamerCaptureSession::AudioAndVideo, this);
        m_cameraControl = new QGstreamerCameraControl(m_captureSession);
        m_videoInput = new QGstreamerV4L2Input(this);
        m_captureSession->setVideoInput(m_videoInput);
        m_videoInputDevice = new QGstreamerVideoInputDeviceControl(this);

        connect(m_videoInputDevice, SIGNAL(selectedDeviceChanged(QString)),
                m_videoInput, SLOT(setDevice(QString)));

        if (m_videoInputDevice->deviceCount())
            m_videoInput->setDevice(m_videoInputDevice->deviceName(m_videoInputDevice->selectedDevice()));

        m_videoRenderer = new QGstreamerVideoRenderer(this);

        m_videoWindow = new QGstreamerVideoWindow(this);
        // If the GStreamer video sink is not available, don't provide the video window control since
        // it won't work anyway.
        if (!m_videoWindow->videoSink()) {
            delete m_videoWindow;
            m_videoWindow = 0;
        }

#if defined(HAVE_WIDGETS)
        m_videoWidgetControl = new QGstreamerVideoWidgetControl(this);

        // If the GStreamer video sink is not available, don't provide the video widget control since
        // it won't work anyway. QVideoWidget will fall back to QVideoRendererControl in that case.
        if (!m_videoWidgetControl->videoSink()) {
            delete m_videoWidgetControl;
            m_videoWidgetControl = 0;
        }
#endif
        m_imageCaptureControl = new QGstreamerImageCaptureControl(m_captureSession);
    }
#endif

    m_audioInputSelector = new QGstreamerAudioInputSelector(this);
    connect(m_audioInputSelector, SIGNAL(activeInputChanged(QString)), m_captureSession, SLOT(setCaptureDevice(QString)));

    if (m_captureSession && m_audioInputSelector->availableInputs().size() > 0)
        m_captureSession->setCaptureDevice(m_audioInputSelector->defaultInput());

    m_metaDataControl = new QGstreamerCaptureMetaDataControl(this);
    connect(m_metaDataControl, SIGNAL(metaDataChanged(QMap<QByteArray,QVariant>)),
            m_captureSession, SLOT(setMetaData(QMap<QByteArray,QVariant>)));
}

QGstreamerCaptureService::~QGstreamerCaptureService()
{
}

QMediaControl *QGstreamerCaptureService::requestControl(const char *name)
{
    if (!m_captureSession)
        return 0;

    if (qstrcmp(name,QAudioInputSelectorControl_iid) == 0)
        return m_audioInputSelector;

    if (qstrcmp(name,QVideoDeviceSelectorControl_iid) == 0)
        return m_videoInputDevice;

    if (qstrcmp(name,QMediaRecorderControl_iid) == 0)
        return m_captureSession->recorderControl();

    if (qstrcmp(name,QAudioEncoderSettingsControl_iid) == 0)
        return m_captureSession->audioEncodeControl();

    if (qstrcmp(name,QVideoEncoderSettingsControl_iid) == 0)
        return m_captureSession->videoEncodeControl();

    if (qstrcmp(name,QImageEncoderControl_iid) == 0)
        return m_captureSession->imageEncodeControl();


    if (qstrcmp(name,QMediaContainerControl_iid) == 0)
        return m_captureSession->mediaContainerControl();

    if (qstrcmp(name,QCameraControl_iid) == 0)
        return m_cameraControl;

    if (qstrcmp(name,QMetaDataWriterControl_iid) == 0)
        return m_metaDataControl;

    if (qstrcmp(name, QCameraImageCaptureControl_iid) == 0)
        return m_imageCaptureControl;

    if (qstrcmp(name,QMediaAudioProbeControl_iid) == 0) {
        if (!m_audioProbeControl) {
            m_audioProbeControl = new QGstreamerAudioProbeControl(this);
            m_captureSession->addProbe(m_audioProbeControl);
        }
        m_audioProbeControl->ref.ref();
        return m_audioProbeControl;
    }

    if (!m_videoOutput) {
        if (qstrcmp(name, QVideoRendererControl_iid) == 0) {
            m_videoOutput = m_videoRenderer;
        } else if (qstrcmp(name, QVideoWindowControl_iid) == 0) {
            m_videoOutput = m_videoWindow;
        }
#if defined(HAVE_WIDGETS)
        else if (qstrcmp(name, QVideoWidgetControl_iid) == 0) {
            m_videoOutput = m_videoWidgetControl;
        }
#endif

        if (m_videoOutput) {
            m_captureSession->setVideoPreview(m_videoOutput);
            return m_videoOutput;
        }
    }

    return 0;
}

void QGstreamerCaptureService::releaseControl(QMediaControl *control)
{
    if (!control) {
        return;
    } else if (control == m_videoOutput) {
        m_videoOutput = 0;
        m_captureSession->setVideoPreview(0);
    } else if (control == m_audioProbeControl && !m_audioProbeControl->ref.deref()) {
        m_captureSession->removeProbe(m_audioProbeControl);
        delete m_audioProbeControl;
        m_audioProbeControl = 0;
    }
}

QT_END_NAMESPACE