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76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
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//------------------------------------------------------------------------------
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// File: DMORt.h
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//
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// Desc: Miscellaneous runtime support for DirectShow Media Objects
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//
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// Copyright (c) 1999 - 2001, Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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#ifndef __DMORT_H__
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#define __DMORT_H__
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//
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// Mediatype helpers. MoInitMediaType() goes with MoFreeMediaType(), and
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// MoCreateMediaType() goes with MoDeleteMediaType(). Don't mix them!
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//
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//
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// Takes a pointer to an already allocated DMO_MEDIA_TYPE structure, allocates
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// a format block of cbFormat bytes, and sets appropriate members of
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// DMO_MEDIA_TYPE to point to the newly allocated format block. Also
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// initializes the IUnknown pointer inside DMO_MEDIA_TYPE to NULL.
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//
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// The format block allocated by MoInitMediaType must be freed by calling
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// MoFreeMediaType().
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//
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STDAPI MoInitMediaType(DMO_MEDIA_TYPE *pmt, DWORD cbFormat);
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//
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// Frees the format block and releases any IUnknown, but does not free the
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// DMO_MEDIA_TYPE structure itself. Input parameter must point to an
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// DMO_MEDIA_TYPE structure previously initialized by MoInitMediaType().
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//
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STDAPI MoFreeMediaType(DMO_MEDIA_TYPE *pmt);
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//
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// Copies the DMO_MEDIA_TYPE members. Also duplicates the format block and
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// the IUnknown pointer. Both parameters must point to valid DMO_MEDIA_TYPE
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// structures. Target structure must be later freed using MoFreeMediaType().
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//
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STDAPI MoCopyMediaType(DMO_MEDIA_TYPE *pmtDest, const DMO_MEDIA_TYPE *pmtSrc);
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//
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// Allocates a new DMO_MEDIA_TYPE structure and initializes it just like
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// MoInitMediaType. I.e., this function allocates both the format block
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// and the DMO_MEDIA_TYPE structure itself. Pointer to DMO_MEDIA_TYPE is
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// returned as *ppmt.
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//
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// DMO_MEDIA_TYPE structures allocated by MoCreateMediaType() must be freed
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// by calling MoDeleteMediaType().
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//
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STDAPI MoCreateMediaType(DMO_MEDIA_TYPE **ppmt, DWORD cbFormat);
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//
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// Frees any format block, releases any IUnknown, and deletes the
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// DMO_MEDIA_TYPE structure itself. The input parameter must point to an
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// DMO_MEDIA_TYPE structure previously allocated by MoCreateMediaType().
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//
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STDAPI MoDeleteMediaType(DMO_MEDIA_TYPE *pmt);
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//
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// Allocates a new DMO_MEDIA_TYPE structure and copies pmtSrc into it like
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// MoCopyMediaType. I.e., this function allocates a new DMO_MEDIA_TYPE struct
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// as well as a new format block for the target mediatype. Trager mediatype
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// must later be freed using MoDeleteMediaType().
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//
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STDAPI MoDuplicateMediaType(DMO_MEDIA_TYPE **ppmtDest, const DMO_MEDIA_TYPE *pmtSrc);
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#endif //__DMORT_H__
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