| Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | //------------------------------------------------------------------------------
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| 2 | // File: MtType.h
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| 3 | //
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| 4 | // Desc: DirectShow base classes - defines a class that holds and manages
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| 5 | // media type information.
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| 6 | //
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| 7 | // Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
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| 8 | //------------------------------------------------------------------------------
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| 9 |
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| 10 |
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| 11 | #ifndef __MTYPE__
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| 12 | #define __MTYPE__
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| 13 |
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| 14 | /* Helper class that derived pin objects can use to compare media
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| 15 | types etc. Has same data members as the struct AM_MEDIA_TYPE defined
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| 16 | in the streams IDL file, but also has (non-virtual) functions */
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| 17 |
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| 18 | class CMediaType : public _AMMediaType {
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| 19 |
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| 20 | public:
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| 21 |
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| 22 | ~CMediaType();
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| 23 | CMediaType();
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| 24 | CMediaType(const GUID * majortype);
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| 25 | CMediaType(const AM_MEDIA_TYPE&, __out_opt HRESULT* phr = NULL);
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| 26 | CMediaType(const CMediaType&, __out_opt HRESULT* phr = NULL);
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| 27 |
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| 28 | CMediaType& operator=(const CMediaType&);
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| 29 | CMediaType& operator=(const AM_MEDIA_TYPE&);
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| 30 |
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| 31 | BOOL operator == (const CMediaType&) const;
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| 32 | BOOL operator != (const CMediaType&) const;
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| 33 |
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| 34 | HRESULT Set(const CMediaType& rt);
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| 35 | HRESULT Set(const AM_MEDIA_TYPE& rt);
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| 36 |
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| 37 | BOOL IsValid() const;
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| 38 |
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| 39 | const GUID *Type() const { return &majortype;} ;
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| 40 | void SetType(const GUID *);
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| 41 | const GUID *Subtype() const { return &subtype;} ;
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| 42 | void SetSubtype(const GUID *);
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| 43 |
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| 44 | BOOL IsFixedSize() const {return bFixedSizeSamples; };
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| 45 | BOOL IsTemporalCompressed() const {return bTemporalCompression; };
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| 46 | ULONG GetSampleSize() const;
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| 47 |
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| 48 | void SetSampleSize(ULONG sz);
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| 49 | void SetVariableSize();
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| 50 | void SetTemporalCompression(BOOL bCompressed);
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| 51 |
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| 52 | // read/write pointer to format - can't change length without
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| 53 | // calling SetFormat, AllocFormatBuffer or ReallocFormatBuffer
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| 54 |
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| 55 | BYTE* Format() const {return pbFormat; };
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| 56 | ULONG FormatLength() const { return cbFormat; };
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| 57 |
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| 58 | void SetFormatType(const GUID *);
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| 59 | const GUID *FormatType() const {return &formattype; };
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| 60 | BOOL SetFormat(__in_bcount(length) BYTE *pFormat, ULONG length);
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| 61 | void ResetFormatBuffer();
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| 62 | BYTE* AllocFormatBuffer(ULONG length);
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| 63 | BYTE* ReallocFormatBuffer(ULONG length);
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| 64 |
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| 65 | void InitMediaType();
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| 66 |
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| 67 | BOOL MatchesPartial(const CMediaType* ppartial) const;
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| 68 | BOOL IsPartiallySpecified(void) const;
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| 69 | };
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| 70 |
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| 71 |
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| 72 | /* General purpose functions to copy and delete a task allocated AM_MEDIA_TYPE
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| 73 | structure which is useful when using the IEnumMediaFormats interface as
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| 74 | the implementation allocates the structures which you must later delete */
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| 75 |
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| 76 | void WINAPI DeleteMediaType(__inout_opt AM_MEDIA_TYPE *pmt);
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| 77 | AM_MEDIA_TYPE * WINAPI CreateMediaType(AM_MEDIA_TYPE const *pSrc);
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| 78 | HRESULT WINAPI CopyMediaType(__out AM_MEDIA_TYPE *pmtTarget, const AM_MEDIA_TYPE *pmtSource);
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| 79 | void WINAPI FreeMediaType(__inout AM_MEDIA_TYPE& mt);
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| 80 |
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| 81 | // Initialize a media type from a WAVEFORMATEX
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| 82 |
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| 83 | STDAPI CreateAudioMediaType(
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| 84 | const WAVEFORMATEX *pwfx,
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| 85 | __out AM_MEDIA_TYPE *pmt,
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| 86 | BOOL bSetFormat);
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| 87 |
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| 88 | #endif /* __MTYPE__ */
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| 89 |
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