/*-------------------------------------------------------------------    AM_MEDIA_TYPE service functions declarations-------------------------------------------------------------------*/#include "guids.h"/** * \brief print info from AM_MEDIA_TYPE structure * =param[in] label short lable for media type * \param[in] pmt pointer to AM_MEDIA_TYPE * * routine used for debug purposes * *///void DisplayMediaType(const char * label,const AM_MEDIA_TYPE* pmt);/** * \brief frees memory, pointed by pbFormat and pUnk members of AM_MEDIA_TYPE structure * * \param[in] pmt pointer to structure * * \note * routine does not frees memory allocated for AM_MEDIA_TYPE, so given pointer will be * valid after this routine call. * */void FreeMediaType(AM_MEDIA_TYPE* pmt);/** * \brief frees memory allocated for AM_MEDIA_TYPE structure, including pbFormat and pUnk *        members * * \param[in] pmt pointer to structure * * \note * after call to this routine, pointer to AM_MEDIA_TYPE will not be valid anymore * */void DeleteMediaType(AM_MEDIA_TYPE* pmt);/** * \brief copyies info from source to destination AM_MEDIA_TYPE structures * * \param[in] pSrc pointer to AM_MEDIA_TYPE structure to copy data from * \param[out] pDst pointer to AM_MEDIA_TYPE structure to copy data to * * \return S_OK - success * \return E_POINTER - pSrc or pDst is NULL or (pSrc->cbFormat && !pSrc->pbFormat) * \return E_INVALIDARG - (pSrc == pDst) * \return E_OUTOFMEMORY - Insufficient memory * * \note * - pDst must point to existing AM_MEDIA_TYPE structure (all data will be overwritten) * - if pDst->pbFormat!=NULL this will cause memory leak (as described in Directshow SDK)! * */HRESULT CopyMediaType(AM_MEDIA_TYPE* pDst,const AM_MEDIA_TYPE* pSrc);/** * \brief allocates new AM_MEDIA_TYPE structure and fills it with info from given one * * \param[in] pSrc pointer to AM_MEDIA_TYPE structure to copy data from * * \return result code, returned from CopyMediaType * */AM_MEDIA_TYPE* CreateMediaType(const AM_MEDIA_TYPE* pSrc);/** * \brief compares two AM_MEDIA_TYPE structures for compatibility * * \param[in] pmt1 first  AM_MEDIA_TYPE structure for compare * \param[in] pmt2 second AM_MEDIA_TYPE structure for compare * \param[in] bWildcards 1 means that GUID_NULL of one structure will be compatible with any value of another structure * * \return 1 if structures are compatible * \return 0 if structures are not compatible * */int CompareMediaTypes(const AM_MEDIA_TYPE * pmt1, const AM_MEDIA_TYPE * pmt2, int bWildcards);