qplatformmediarecorder_p.h

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#ifndef QPLATFORMMEDIARECORDER_H
#define QPLATFORMMEDIARECORDER_H
 
#include <QtCore/qurl.h>
#include <QtCore/qsize.h>
#include <QtCore/qmimetype.h>
#include <QtCore/qpointer.h>
#include <QtCore/qiodevice.h>
 
#include <QtMultimedia/qmediarecorder.h>
#include <QtMultimedia/qmediametadata.h>
#include <QtMultimedia/qmediaformat.h>
#include <QtMultimedia/private/qerrorinfo_p.h>
#include <QtCore/private/qglobal_p.h>
 
QT_BEGIN_NAMESPACE
 
class QUrl;
QT_END_NAMESPACE
 
QT_BEGIN_NAMESPACE
 
class Q_MULTIMEDIA_EXPORT QMediaEncoderSettings
{
    QMediaRecorder::EncodingMode m_encodingMode = QMediaRecorder::ConstantQualityEncoding;
    QMediaRecorder::Quality m_quality = QMediaRecorder::NormalQuality;
 
    QMediaFormat m_format;
    int m_audioBitrate = -1;
    int m_audioSampleRate = -1;
    int m_audioChannels = -1;
 
    QSize m_videoResolution = QSize(-1, -1);
    int m_videoFrameRate = -1;
    int m_videoBitRate = -1;
public:
 
    QMediaFormat mediaFormat() const { return m_format; }
    void setMediaFormat(const QMediaFormat &format) { m_format = format; }
    void resolveFormat(QMediaFormat::ResolveFlags flags = QMediaFormat::NoFlags)
    { m_format.resolveForEncoding(flags); }
 
    QMediaFormat::FileFormat fileFormat() const { return mediaFormat().fileFormat(); }
    QMediaFormat::VideoCodec videoCodec() const { return mediaFormat().videoCodec(); }
    QMediaFormat::AudioCodec audioCodec() const { return mediaFormat().audioCodec(); }
    QMimeType mimeType() const { return mediaFormat().mimeType(); }
 
    QMediaRecorder::EncodingMode encodingMode() const { return m_encodingMode; }
    void setEncodingMode(QMediaRecorder::EncodingMode mode) { m_encodingMode = mode; }
 
    QMediaRecorder::Quality quality() const { return m_quality; }
    void setQuality(QMediaRecorder::Quality quality) { m_quality = quality; }
 
    QSize videoResolution() const { return m_videoResolution; }
    void setVideoResolution(const QSize &size) { m_videoResolution = size; }
 
    qreal videoFrameRate() const { return m_videoFrameRate; }
    void setVideoFrameRate(qreal rate) { m_videoFrameRate = rate; }
 
    int videoBitRate() const { return m_videoBitRate; }
    void setVideoBitRate(int bitrate) { m_videoBitRate = bitrate; }
 
    int audioBitRate() const { return m_audioBitrate; }
    void setAudioBitRate(int bitrate) { m_audioBitrate = bitrate; }
 
    int audioChannelCount() const { return m_audioChannels; }
    void setAudioChannelCount(int channels) { m_audioChannels = channels; }
 
    int audioSampleRate() const { return m_audioSampleRate; }
    void setAudioSampleRate(int rate) { m_audioSampleRate = rate; }
 
    bool operator==(const QMediaEncoderSettings &other) const
    {
        return m_format == other.m_format &&
               m_encodingMode == other.m_encodingMode &&
               m_quality == other.m_quality &&
               m_audioBitrate == other.m_audioBitrate &&
               m_audioSampleRate == other.m_audioSampleRate &&
               m_audioChannels == other.m_audioChannels &&
               m_videoResolution == other.m_videoResolution &&
               m_videoFrameRate == other.m_videoFrameRate &&
               m_videoBitRate == other.m_videoBitRate;
    }
 
    bool operator!=(const QMediaEncoderSettings &other) const
    { return !operator==(other); }
};
 
class Q_MULTIMEDIA_EXPORT QPlatformMediaRecorder
{
public:
    virtual ~QPlatformMediaRecorder() {}
 
    virtual bool isLocationWritable(const QUrl &location) const = 0;
 
    virtual QMediaRecorder::RecorderState state() const { return m_state; }
    virtual void record(QMediaEncoderSettings &settings) = 0;
    virtual void pause();
    virtual void resume();
    virtual void stop() = 0;
 
    virtual qint64 duration() const { return m_duration; }
 
    virtual void setMetaData(const QMediaMetaData &) {}
    virtual QMediaMetaData metaData() const { return {}; }
 
    QMediaRecorder::Error error() const { return m_error.code(); }
    QString errorString() const { return m_error.description(); }
 
    QUrl outputLocation() const { return m_outputLocation; }
    virtual void setOutputLocation(const QUrl &location) { m_outputLocation = location; }
    QUrl actualLocation() const { return m_actualLocation; }
    void clearActualLocation() { m_actualLocation.clear(); }
    void clearError() { updateError(QMediaRecorder::NoError, QString()); }
 
    QIODevice *outputDevice() const { return m_outputDevice; }
    void setOutputDevice(QIODevice *device) { m_outputDevice = device; }
 
protected:
    explicit QPlatformMediaRecorder(QMediaRecorder *parent);
 
    void stateChanged(QMediaRecorder::RecorderState state);
    void durationChanged(qint64 position);
    void actualLocationChanged(const QUrl &location);
    void updateError(QMediaRecorder::Error error, const QString &errorString);
    void metaDataChanged();
 
    QMediaRecorder *mediaRecorder() { return q; }
 
    QString findActualLocation(const QMediaEncoderSettings &settings) const;
 
private:
    QMediaRecorder *q = nullptr;
    QErrorInfo<QMediaRecorder::Error> m_error;
    QUrl m_actualLocation;
    QUrl m_outputLocation;
    QPointer<QIODevice> m_outputDevice;
    qint64 m_duration = 0;
 
    QMediaRecorder::RecorderState m_state = QMediaRecorder::StoppedState;
};
 
QT_END_NAMESPACE
 
#endif