Revision control
++ // Copyright (C) 2022 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 QFFMPEGRESAMPLER_P_H
++ #define QFFMPEGRESAMPLER_P_H
++
++ //
++ // 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.
++ //
++
++ #include "qaudiobuffer.h"
++ #include <QtFFmpegMediaPluginImpl/private/qffmpeg_p.h>
++ #include <QtMultimedia/private/qplatformaudioresampler_p.h>
++
++ QT_BEGIN_NAMESPACE
++
++ namespace QFFmpeg
++ {
++ class CodecContext;
++ } // namespace QFFmpeg
++
++ class QFFmpegResampler : public QPlatformAudioResampler
++ {
++ QFFmpegResampler(const QAudioFormat &inputFormat, const QAudioFormat &outputFormat,
++ qint64 startTime);
++ QFFmpegResampler(const QFFmpeg::CodecContext *codecContext, const QAudioFormat &outputFormat,
++ qint64 startTime);
++
++ template <typename... Args>
++ static std::unique_ptr<QFFmpegResampler> createImpl(Args...);
++
++ public:
++ static std::unique_ptr<QFFmpegResampler> createFromInputFormat(const QAudioFormat &input,
++ const QAudioFormat &output,
++ qint64 startTime = 0);
++ static std::unique_ptr<QFFmpegResampler> createFromCodecContext(const QFFmpeg::CodecContext *,
++ const QAudioFormat &output,
++ qint64 startTime = 0);
++
++ ~QFFmpegResampler() override;
++
++ bool isInitialized() const;
++
++ QAudioBuffer resample(const char *data, size_t size) override;
++
++ QAudioBuffer resample(const AVFrame *frame);
++
++ qint64 samplesProcessed() const { return m_samplesProcessed; }
++ void setSampleCompensation(qint32 delta, quint32 distance);
++ qint32 activeSampleCompensationDelta() const;
++
++ private:
++ int adjustMaxOutSamples(int inputSamplesCount);
++
++ QAudioBuffer resample(const uint8_t **inputData, int inputSamplesCount);
++
++ private:
++ QAudioFormat m_inputFormat;
++ QAudioFormat m_outputFormat;
++ qint64 m_startTime = 0;
++ QFFmpeg::SwrContextUPtr m_resampler;
++ qint64 m_samplesProcessed = 0;
++ qint64 m_endCompensationSample = std::numeric_limits<qint64>::min();
++ qint32 m_sampleCompensationDelta = 0;
++ };
++
++ QT_END_NAMESPACE
++
++ #endif