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/**********************************************************************
Audacity: A Digital Audio Editor
AVIOContextWrapper.h
Dmitry Vedenko
**********************************************************************/
#pragma once
#include <cstdint>
#include <memory>
#include <wx/file.h>
struct FFmpegFunctions;
typedef struct AVIOContext AVIOContext;
class FFMPEG_SUPPORT_API AVIOContextWrapper
{
public:
enum class OpenResult
{
Success,
FileOpenFailed,
NoMemory,
InternalError
};
AVIOContextWrapper(const AVIOContextWrapper&) = delete;
AVIOContextWrapper& operator=(AVIOContextWrapper&) = delete;
AVIOContextWrapper(AVIOContextWrapper&&) = delete;
AVIOContextWrapper& operator=(AVIOContextWrapper&&) = delete;
explicit AVIOContextWrapper(const FFmpegFunctions& ffmpeg) noexcept;
AVIOContext* GetWrappedValue() noexcept;
const AVIOContext* GetWrappedValue() const noexcept;
virtual ~AVIOContextWrapper();
OpenResult Open(const wxString& fileName, bool forWriting);
virtual unsigned char* GetBuffer() const noexcept = 0;
virtual int GetBufferSize() const noexcept = 0;
virtual unsigned char* GetBufPtr() const noexcept = 0;
virtual unsigned char* GetBufEnd() const noexcept = 0;
virtual void* GetOpaque() const noexcept = 0;
virtual void SetOpaque(void* opaque) noexcept = 0;
virtual int64_t GetPos() const noexcept = 0;
virtual int GetEofReached() const noexcept = 0;
virtual int GetWriteFlag() const noexcept = 0;
virtual void SetWriteFlag(int write_flag) noexcept = 0;
virtual int GetError() const noexcept = 0;
virtual void SetError(int error) noexcept = 0;
virtual int GetSeekable() const noexcept = 0;
virtual void SetSeekable(int seekable) noexcept = 0;
virtual int GetDirect() const noexcept = 0;
virtual void SetDirect(int direct) noexcept = 0;
protected:
virtual int Read(uint8_t* buf, int size) = 0;
const FFmpegFunctions& mFFmpeg;
AVIOContext* mAVIOContext { nullptr };
//! This is held indirectly by unique_ptr just so it can be swapped
std::unique_ptr<wxFile> mpFile;
private:
static int FileRead(void* opaque, uint8_t* buf, int size);
static int FileWrite(void* opaque, const uint8_t* buf, int size);
static int64_t FileSeek(void* opaque, int64_t pos, int whence);
};
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