90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
//==========================================================================;
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//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
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// KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
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// PURPOSE.
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//
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// Copyright (c) 1992 - 2000 Microsoft Corporation. All Rights Reserved.
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//
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//--------------------------------------------------------------------------;
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// Class that holds and manages media type information, December 1994
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#ifndef __MTYPE__
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#define __MTYPE__
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/* Helper class that derived pin objects can use to compare media
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types etc. Has same data members as the struct AM_MEDIA_TYPE defined
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in the streams IDL file, but also has (non-virtual) functions */
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class CMediaType : public _AMMediaType {
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public:
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~CMediaType();
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CMediaType();
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CMediaType(const GUID * majortype);
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CMediaType(const AM_MEDIA_TYPE&);
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CMediaType(const CMediaType&);
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CMediaType& operator=(const CMediaType&);
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CMediaType& operator=(const AM_MEDIA_TYPE&);
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BOOL operator == (const CMediaType&) const;
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BOOL operator != (const CMediaType&) const;
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BOOL IsValid() const;
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const GUID *Type() const { return &majortype;} ;
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void SetType(const GUID *);
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const GUID *Subtype() const { return &subtype;} ;
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void SetSubtype(const GUID *);
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BOOL IsFixedSize() const {return bFixedSizeSamples; };
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BOOL IsTemporalCompressed() const {return bTemporalCompression; };
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ULONG GetSampleSize() const;
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void SetSampleSize(ULONG sz);
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void SetVariableSize();
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void SetTemporalCompression(BOOL bCompressed);
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// read/write pointer to format - can't change length without
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// calling SetFormat, AllocFormatBuffer or ReallocFormatBuffer
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BYTE* Format() const {return pbFormat; };
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ULONG FormatLength() const { return cbFormat; };
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void SetFormatType(const GUID *);
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const GUID *FormatType() const {return &formattype; };
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BOOL SetFormat(BYTE *pFormat, ULONG length);
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void ResetFormatBuffer();
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BYTE* AllocFormatBuffer(ULONG length);
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BYTE* ReallocFormatBuffer(ULONG length);
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void InitMediaType();
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BOOL MatchesPartial(const CMediaType* ppartial) const;
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BOOL IsPartiallySpecified(void) const;
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};
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/* General purpose functions to copy and delete a task allocated AM_MEDIA_TYPE
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structure which is useful when using the IEnumMediaFormats interface as
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the implementation allocates the structures which you must later delete */
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void WINAPI DeleteMediaType(AM_MEDIA_TYPE *pmt);
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AM_MEDIA_TYPE * WINAPI CreateMediaType(AM_MEDIA_TYPE const *pSrc);
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void WINAPI CopyMediaType(AM_MEDIA_TYPE *pmtTarget, const AM_MEDIA_TYPE *pmtSource);
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void WINAPI FreeMediaType(AM_MEDIA_TYPE& mt);
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// Initialize a media type from a WAVEFORMATEX
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STDAPI CreateAudioMediaType(
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const WAVEFORMATEX *pwfx,
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AM_MEDIA_TYPE *pmt,
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BOOL bSetFormat);
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#endif /* __MTYPE__ */
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