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++ // Copyright (C) 2024 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
++
++ #ifndef QENCODINGINITIALIZER_P_H
++ #define QENCODINGINITIALIZER_P_H
++
++ #include "qobject.h"
++ #include <QtMultimedia/private/qmediainputencoderinterface_p.h>
++ #include <unordered_set>
++ #include <vector>
++
++ //
++ // 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.
++ //
++
++ QT_BEGIN_NAMESPACE
++
++ class QFFmpegAudioInput;
++ class QPlatformVideoSource;
++ class QPlatformAudioBufferInput;
++ class QAudioBufferSource;
++ class QMediaInputEncoderInterface;
++
++ namespace QFFmpeg {
++
++ class RecordingEngine;
++
++ // Initializes RecordingEngine with audio and video sources, potentially lazily
++ // upon first frame arrival if video frame format is not pre-determined.
++ class EncodingInitializer : public QObject, private QMediaInputEncoderInterface
++ {
++ public:
++ EncodingInitializer(RecordingEngine &engine);
++
++ ~EncodingInitializer() override;
++
++ bool start(const std::vector<QAudioBufferSource *> &audioSources,
++ const std::vector<QPlatformVideoSource *> &videoSources);
++
++ private:
++ void addAudioBufferInput(QPlatformAudioBufferInput *input);
++
++ void addPendingAudioBufferInput(QPlatformAudioBufferInput *input);
++
++ void addVideoSource(QPlatformVideoSource *source);
++
++ void addPendingVideoSource(QPlatformVideoSource *source);
++
++ void addPendingSource(QObject *source);
++
++ bool tryStartRecordingEngine();
++
++ private:
++ void emitStreamInitializationError(QString error);
++
++ template <typename F>
++ void erasePendingSource(QObject *source, F &&functionOrError, bool destroyed = false);
++
++ bool canPushFrame() const override;
++
++ private:
++ RecordingEngine &m_recordingEngine;
++ std::unordered_set<QObject *> m_pendingSources;
++ };
++
++ } // namespace QFFmpeg
++
++ QT_END_NAMESPACE
++
++ #endif // QENCODINGINITIALIZER_P_H