AVPacketWrapper.h

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  AVPacketWrapper.h
 
  Dmitry Vedenko
 
**********************************************************************/
 
#pragma once
 
#include "FFmpegTypes.h"
 
#include <memory>
 
struct FFmpegFunctions;
typedef struct AVPacket AVPacket;
 
class FFMPEG_SUPPORT_API AVPacketWrapper
{
public:
   AVPacketWrapper(const AVPacketWrapper&) = delete;
   AVPacketWrapper& operator=(AVPacketWrapper&) = delete;
 
   AVPacketWrapper(AVPacketWrapper&&) = delete;
   AVPacketWrapper& operator=(AVPacketWrapper&&) = delete;
 
   explicit AVPacketWrapper(const FFmpegFunctions& ffmpeg) noexcept;
 
   AVPacket* GetWrappedValue() noexcept;
   const AVPacket* GetWrappedValue() const noexcept;
 
   virtual ~AVPacketWrapper();
 
   virtual AudacityAVBufferRef* GetBuf() const noexcept = 0;
 
   virtual int64_t GetPresentationTimestamp() const noexcept = 0;
   virtual int64_t GetDecompressionTimestamp() const noexcept = 0;
 
   virtual int GetDuration() const noexcept = 0;
 
   virtual void RescalePresentationTimestamp(AudacityAVRational bq, AudacityAVRational cq) noexcept = 0;
   virtual void RescaleDecompressionTimestamp(AudacityAVRational bq, AudacityAVRational cq) noexcept = 0;
   virtual void RescaleDuration(AudacityAVRational bq, AudacityAVRational cq) noexcept = 0;
 
   virtual uint8_t* GetData() const noexcept = 0;
   virtual int GetSize() const noexcept = 0;
 
   virtual bool OffsetPacket(size_t offset) noexcept = 0;
   virtual void ResetData() noexcept = 0;
   virtual void ResetTimestamps() noexcept = 0;
 
   virtual int GetStreamIndex() const noexcept = 0;
   virtual void SetStreamIndex(int index) noexcept = 0;
 
   virtual int GetFlags() const noexcept = 0;
   virtual int64_t GetPos() const noexcept = 0;
   virtual int64_t GetConvergenceDuration() const noexcept = 0;
 
   virtual std::unique_ptr<AVPacketWrapper> Clone() const noexcept = 0;
 
protected:
   const FFmpegFunctions& mFFmpeg;
   AVPacket* mAVPacket { nullptr };
 
   bool mUseAVFree { true };
};