AudioSegmentSampleView.h

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/*  SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
 
  Audacity: A Digital Audio Editor
 
  @file AudioSegmentSampleView.h
  @brief An audio segment is either a whole clip or the silence between clips.
Views allow shared references to the same memory yet over instance-specific
ranges.
 
  Matthieu Hodgkinson
 
**********************************************************************/
#pragma once
 
#include "SampleCount.h"
 
#include <chrono>
#include <fstream>
#include <memory>
#include <vector>
 
using BlockSampleView = std::shared_ptr<std::vector<float>>;
 
class STRETCHING_SEQUENCE_API AudioSegmentSampleView final
{
public:
   AudioSegmentSampleView(
      std::vector<BlockSampleView> blockViews, size_t start, size_t length);
 
   AudioSegmentSampleView(size_t length);
 
   void Copy(float* buffer, size_t bufferSize) const;
 
   void AddTo(float* buffer, size_t bufferSize) const;
 
   size_t GetSampleCount() const;
 
private:
   void DoCopy(float* buffer, size_t bufferSize) const;
   void DoAdd(float* buffer, size_t bufferSize) const;
 
   const std::vector<BlockSampleView> mBlockViews;
   const size_t mStart = 0;
   const size_t mLength;
   const bool mIsSilent;
};
 
using ChannelSampleView = std::vector<AudioSegmentSampleView>;