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//------------------------------------------------------------------------------
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// File: MPEGType.h
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//
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// Desc: MPEG system stream compound type definition
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//
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// Copyright (c) 1996 - 2000, Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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#ifndef __MPEGTYPE__
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#define __MPEGTYPE__
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#ifdef __cplusplus
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extern "C" {
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#endif // __cplusplus
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//
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// AM_MPEGSYSTEMTYPE defines the format block contents for
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// data of type MEDIATYPE_MPEG1System when the format
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// block GUID is FORMAT_MPEG1System
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//
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// The format block consists of elements of type
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// AM_MPEGSYSTEMTYPE up to the length of the format block
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// Each format block is 8-byte aligned from the start of
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// the format block
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//
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typedef struct tagAM_MPEGSTREAMTYPE
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{
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DWORD dwStreamId; // Stream id of stream to process
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DWORD dwReserved; // 8-byte alignment
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AM_MEDIA_TYPE mt; // Type for substream - pbFormat is NULL
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BYTE bFormat[1]; // Format data
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} AM_MPEGSTREAMTYPE;
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typedef struct tagAM_MPEGSYSTEMTYPE
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{
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DWORD dwBitRate; // Bits per second
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DWORD cStreams; // Number of streams
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AM_MPEGSTREAMTYPE Streams[1];
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} AM_MPEGSYSTEMTYPE;
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//
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// Helper macros for AM_MPEGSTREAMTYPE
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//
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#define AM_MPEGSTREAMTYPE_ELEMENTLENGTH(pStreamType) \
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FIELD_OFFSET(AM_MPEGSTREAMTYPE, bFormat[(pStreamType)->mt.cbFormat])
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#define AM_MPEGSTREAMTYPE_NEXT(pStreamType) \
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((AM_MPEGSTREAMTYPE *)((PBYTE)(pStreamType) + \
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((AM_MPEGSTREAMTYPE_ELEMENTLENGTH(pStreamType) + 7) & ~7)))
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//
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// IMpegAudioDecoder
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//
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// Values for DualMode
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#define AM_MPEG_AUDIO_DUAL_MERGE 0
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#define AM_MPEG_AUDIO_DUAL_LEFT 1
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#define AM_MPEG_AUDIO_DUAL_RIGHT 2
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DECLARE_INTERFACE_(IMpegAudioDecoder, IUnknown) {
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STDMETHOD(get_FrequencyDivider) (THIS_
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unsigned long *pDivider /* [out] */
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) PURE;
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STDMETHOD(put_FrequencyDivider) (THIS_
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unsigned long Divider /* [in] */
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) PURE;
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STDMETHOD(get_DecoderAccuracy) (THIS_
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unsigned long *pAccuracy /* [out] */
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) PURE;
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STDMETHOD(put_DecoderAccuracy) (THIS_
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unsigned long Accuracy /* [in] */
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) PURE;
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STDMETHOD(get_Stereo) (THIS_
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unsigned long *pStereo /* [out] */
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) PURE;
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STDMETHOD(put_Stereo) (THIS_
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unsigned long Stereo /* [in] */
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) PURE;
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STDMETHOD(get_DecoderWordSize) (THIS_
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unsigned long *pWordSize /* [out] */
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) PURE;
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STDMETHOD(put_DecoderWordSize) (THIS_
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unsigned long WordSize /* [in] */
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) PURE;
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STDMETHOD(get_IntegerDecode) (THIS_
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unsigned long *pIntDecode /* [out] */
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) PURE;
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STDMETHOD(put_IntegerDecode) (THIS_
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unsigned long IntDecode /* [in] */
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) PURE;
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STDMETHOD(get_DualMode) (THIS_
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unsigned long *pIntDecode /* [out] */
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) PURE;
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STDMETHOD(put_DualMode) (THIS_
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unsigned long IntDecode /* [in] */
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) PURE;
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STDMETHOD(get_AudioFormat) (THIS_
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MPEG1WAVEFORMAT *lpFmt /* [out] */
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) PURE;
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};
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#ifdef __cplusplus
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}
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#endif // __cplusplus
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#endif // __MPEGTYPE__
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