127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
/*******************************************************************************
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* Copyright 2009-2025 Jörg Müller
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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******************************************************************************/
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#pragma once
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/**
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* @file TimeStretchPitchScaleReader.h
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* @ingroup fx
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* The TimeStretchPitchScaleReader class.
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*/
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#include "TimeStretchPitchScale.h"
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#include "fx/EffectReader.h"
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#include "rubberband/RubberBandStretcher.h"
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#include "util/Buffer.h"
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using namespace RubberBand;
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AUD_NAMESPACE_BEGIN
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/**
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* This class reads from another reader and applies time-stretching and pitch scaling.
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*/
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class AUD_API TimeStretchPitchScaleReader : public EffectReader
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{
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private:
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/**
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* The input buffer for the reader.
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*/
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Buffer m_buffer;
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/**
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* The input/output deinterleaved buffers for each channel.
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*/
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std::vector<Buffer> m_deinterleaved;
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/**
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* The pointers to the input/output deinterleaved buffer data for processing/retrieving.
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*/
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std::vector<sample_t*> m_channelData;
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/**
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* Number of samples that need to be dropped at the beginning or after a seek.
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*/
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int m_samplesToDrop;
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// delete copy constructor and operator=
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TimeStretchPitchScaleReader(const TimeStretchPitchScaleReader&) = delete;
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TimeStretchPitchScaleReader& operator=(const TimeStretchPitchScaleReader&) = delete;
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protected:
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/**
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* Feeds the number of required zero samples to the stretcher and queries the amount of samples to drop.
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*/
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void reset();
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/**
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* Rubberband stretcher.
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*/
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std::unique_ptr<RubberBandStretcher> m_stretcher;
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/**
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* The current position.
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*/
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int m_position;
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/**
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* Whether the reader has reached the end of stream.
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*/
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bool m_finishedReader;
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public:
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/**
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* Creates a new stretcher reader.
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* \param reader The reader to read from.
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* \param timeRatio The factor by which to stretch or compress time.
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* \param pitchScale The factor by which to adjust the pitch.
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* \param quality The processing quality level of the stretcher.
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* \param preserveFormant Whether to preserve the vocal formants for the stretcher.
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*/
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TimeStretchPitchScaleReader(std::shared_ptr<IReader> reader, double timeRatio, double pitchScale, StretcherQuality quality, bool preserveFormant);
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virtual void read(int& length, bool& eos, sample_t* buffer);
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virtual void seek(int position);
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virtual int getLength() const;
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virtual int getPosition() const;
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/**
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* Retrieves the current time ratio for the stretcher.
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* \return The current time ratio value.
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*/
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double getTimeRatio() const;
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/**
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* Sets the time ratio for the stretcher.
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*/
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void setTimeRatio(double timeRatio);
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/**
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* Retrieves the pitch scale for the stretcher.
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* \return The current pitch scale value.
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*/
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double getPitchScale() const;
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/**
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* Sets the pitch scale for the stretcher.
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*/
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void setPitchScale(double pitchScale);
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};
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AUD_NAMESPACE_END
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