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/**********************************************************************
Audacity: A Digital Audio Editor
AVIOContextWrapperImpl.inl
Dmitry Vedenko
**********************************************************************/
class AVIOContextWrapperImpl : public AVIOContextWrapper
{
public:
explicit AVIOContextWrapperImpl(const FFmpegFunctions& ffmpeg)
: AVIOContextWrapper(ffmpeg)
{}
~AVIOContextWrapperImpl()
{
if (mAVIOContext != nullptr)
mFFmpeg.av_free(mAVIOContext->buffer);
}
unsigned char* GetBuffer() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->buffer;
return {};
}
int GetBufferSize() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->buffer_size;
return {};
}
unsigned char* GetBufPtr() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->buf_ptr;
return {};
}
unsigned char* GetBufEnd() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->buf_end;
return {};
}
void* GetOpaque() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->opaque;
return {};
}
void SetOpaque(void* opaque) noexcept override
{
if (mAVIOContext != nullptr)
mAVIOContext->opaque = opaque;
}
int64_t GetPos() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->pos;
return {};
}
int GetEofReached() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->eof_reached;
return {};
}
int GetWriteFlag() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->write_flag;
return {};
}
void SetWriteFlag(int write_flag) noexcept override
{
if (mAVIOContext != nullptr)
mAVIOContext->write_flag = write_flag;
}
int GetError() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->error;
return {};
}
void SetError(int error) noexcept override
{
if (mAVIOContext != nullptr)
mAVIOContext->error = error;
}
int GetSeekable() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->seekable;
return {};
}
void SetSeekable(int seekable) noexcept override
{
if (mAVIOContext != nullptr)
mAVIOContext->seekable = seekable;
}
int GetDirect() const noexcept override
{
if (mAVIOContext != nullptr)
return mAVIOContext->direct;
return {};
}
void SetDirect(int direct) noexcept override
{
if (mAVIOContext != nullptr)
mAVIOContext->direct = direct;
}
int Read(uint8_t* buf, int size) override
{
if (mpFile == nullptr)
return AUDACITY_AVERROR(EINVAL);
#if LIBAVFORMAT_VERSION_MAJOR >= 58
// At least starting from avformat 58 FFmpeg expects EOF to be returned here
// instead of 0. This is critical for some codecs
if (mpFile->Eof())
return AUDACITY_AVERROR_EOF;
#endif
return static_cast<int>(mpFile->Read(buf, size));
}
};
std::unique_ptr<AVIOContextWrapper> CreateAVIOContextWrapper(const FFmpegFunctions& ffmpeg)
{
return std::make_unique<AVIOContextWrapperImpl>(ffmpeg);
}
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