cDirectMediaType.h

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//
//
 
#ifndef _INC_cDirectMediaType_H
#define _INC_cDirectMediaType_H
#ifndef NO_PRAGMA_ONCE
#pragma once
#endif
 
#include "../GrayLibBase.h"
#include "GrayCore/include/cMem.h"
 
#if defined(USE_DX_SHOW)
#include <uuids.h>              // CLSID_FilterGraph, CLSID_SystemDeviceEnum
#include <strmif.h>             // IID_IGraphBuilder, ICreateDevEnum
#include <control.h>    // IID_IMediaControl
 
// #include <evcode.h>          // EC_DEVICE_LOST // EC_COMPLETE in M$ SDK 7.0 ?
#ifndef EC_COMPLETE
#define EC_COMPLETE 0x01
#endif
#ifndef EC_DEVICE_LOST
#define EC_DEVICE_LOST  1
#define EC_USERABORT    2
#define EC_ERRORABORT   3
#endif
#ifndef OATRUE
#define OATRUE (-1)
#endif // OATRUE
 
namespace GrayLib
{
        class cDirectMediaType : public ::AM_MEDIA_TYPE
        {
        public:
                cDirectMediaType() noexcept
                {
                        cMem::Zero(static_cast<::AM_MEDIA_TYPE*>(this), sizeof(::AM_MEDIA_TYPE));
                }
                ~cDirectMediaType()
                {
                        FreeMediaType();
                }
                void FreeMediaType()
                {
                        FreeMediaType(*this);
                }
                static inline void FreeMediaType(::AM_MEDIA_TYPE& mt)
                {
                        if (mt.cbFormat != 0 && mt.pbFormat != nullptr)
                        {
                                ::CoTaskMemFree((PVOID)mt.pbFormat);
                                mt.cbFormat = 0;
                                mt.pbFormat = nullptr;
                        }
                        if (mt.pUnk != nullptr)
                        {
                                mt.pUnk->Release();
                                mt.pUnk = nullptr;
                        }
                }
        };
}
#endif
#endif