pcmfmt.h

来自「SigmDesign SMP8634 media decode chip dev」· C头文件 代码 · 共 69 行

//*@@@+++@@@@******************************************************************
//
// Microsoft Windows Media
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//*@@@---@@@@******************************************************************

#ifndef __PCMFMT_COM_H__
#define __PCMFMT_COM_H__

#include "wmatypes.h"

typedef enum _PCMData {
    PCMDataPCM        = 0,
    PCMDataIEEE_FLOAT = 1,
} PCMData;

//#pragma pack (push)
//#pragma pack () // default
typedef struct _PCMFormat {
    U32 nSamplesPerSec;               
    U32 nChannels;
    U32 nChannelMask;
    U32 nValidBitsPerSample;
    U32 cbPCMContainerSize;
    PCMData pcmData;
} PCMFormat2;
//#pragma pack (pop)

#ifndef PCMFormat_defined
typedef struct _PCMFormat PCMFormat;
#define PCMFormat_defined
#endif

#endif//__PCMFMT_COM_H__

#ifndef __PCMFMT_H__
#define __PCMFMT_H__

#ifdef __cplusplus
extern "C" {
#endif

#ifdef _WAVEFORMATEX_
void WaveFormatEx2PCMFormat(WAVEFORMATEX* wfx, PCMFormat* pFormat);
void PCMFormat2WaveFormatEx(PCMFormat* pFormat, WAVEFORMATEX* wfx);
Bool ValidateWaveFormat(WAVEFORMATEX* wfx);
Bool ValidateUncompressedFormat(WAVEFORMATEX* wfx);

#ifdef _WAVEFORMATEXTENSIBLE_
void PCMFormat2WaveFormatExtensible(PCMFormat* pFormat, WAVEFORMATEXTENSIBLE* wfx);
#endif//_WAVEFORMATEXTENSIBLE_
#endif//_WAVEFORMATEX_

#ifdef GUID_DEFINED
void FormatTag2GUID(U16 wFormatTag, GUID* pGUID);
#endif

Bool NeedExtensible(U32 nBitsPerSample, U32 nChannels, U32 nChannelMask);
Bool PCMFormatEquivalent(PCMFormat*, PCMFormat*);
U32 DefaultChannelMask(U32 nChannels);

#ifdef __cplusplus
}
#endif

#endif//__PCMFMT_H__