wmaudio_type.h

音频wma格式文件解码库

//*@@@+++@@@@******************************************************************
//
// Microsoft Windows Media
// Copyright (C) Microsoft Corporation. All rights reserved.
//
//*@@@---@@@@******************************************************************
/*
 * Windows Media Audio (WMA) Decoder API (implementation)
 *
 * Copyright (c) Microsoft Corporation 1999.  All Rights Reserved.
 */

#ifndef _WMAUDIO_IMPL_H_
#define _WMAUDIO_IMPL_H_

#include "wmaerr.h"
#include "wmatypes.h"

#ifndef WMAAPI_NO_DRM
#include "drmpd_ext.h"
#endif /* WMAAPI_NO_DRM */
#include "wmadecs_api.h"
#ifdef USE_WOW_FILTER
#include "wow_interface.h"
#endif
#define MIN_OBJECT_SIZE     24
#define DATA_OBJECT_SIZE    50

typedef struct WMA_PAYLOADEXTNSYSTEM
{
    GUID GuidExtnSystemId;
    WORD u16ExtnDataSize;
} WMAPAYLOADEXTNSYSTEM;

typedef struct WMA_PAYLOADEXTNSYSTEMLIST
{
    WORD u16ExtnSysCount;
    WMAPAYLOADEXTNSYSTEM  *pExtSys;
} WMAPAYLOADEXTNSYSTEMLIST;


/* parser state  */
typedef enum
{
    csWMA_NotValid = 0,

    csWMA_HeaderStart,
    csWMA_HeaderError,

    csWMA_NewAsfPacket,

    /* packet parsing states */

    csWMA_DecodePayloadStart,
    csWMA_DecodePayload,
    csWMA_DecodePayloadHeader,
    csWMA_DecodeLoopStart,
    csWMA_DecodePayloadEnd,
    csWMA_DecodeCompressedPayload,

    csWMA_End_

} tWMAParseState;


/* internal structure for the ASF header parsing */
typedef struct tagWMAFileHdrStateInternal
{
    DWORD currPacketOffset;     /* not just for packets */
    DWORD nextPacketOffset;

    /* ASF header */

    DWORD   cbHeader;
    DWORD   cbPacketSize;
    DWORD   cbAudioSize;
    DWORD   cPackets;
    DWORD   msDuration;
    DWORD   msPreroll;
    DWORD   cbFirstPacketOffset;
    DWORD   cbLastPacketOffset;

    /* audio prop */

    WORD    nVersion;
    DWORD   nSamplesPerSec;
    DWORD   nAvgBytesPerSec;
    DWORD   nBlockAlign;
    WORD    nChannels;
    DWORD   nSamplesPerBlock;
    WORD    nEncodeOpt;

    /* DRM */

    BYTE    pbSecretData[32];
    DWORD   cbSecretData;
    BYTE    pbType[16];
    BYTE    pbKeyID[32];

    /* Content Description */

    DWORD   cbCDOffset;
    WORD    cbCDTitle;
    WORD    cbCDAuthor;
    WORD    cbCDCopyright;
    WORD    cbCDDescription;
    WORD    cbCDRating;

    /* Extended Content Description */

    tWMAExtendedContentDesc *m_pECDesc;

    /* Marker */
    DWORD   m_dwMarkerNum;
    MarkerEntry *m_pMarker;

    /* License Store */
    DWORD   m_dwLicenseLen;
    BYTE   *m_pLicData;

#ifndef WMAAPI_NO_DRM_STREAM
    BYTE    bAudioStreamNum;
    BYTE    bDRMAuxStreamNum;
#endif
// Members added by Amit 
    WORD    wAudioStreamId;

    
    DWORD                dwCryptoVersion;
    DWORD                cbUDLData;
    BYTE*                pbUDLData;
    BOOL                 bHasDRM;
    WMAPAYLOADEXTNSYSTEMLIST ExtSysList[127];
    DWORD                dwUDLRepIndex;



} tWMAFileHdrStateInternal;

//typedef void * WMADecHANDLE;

/* internal structure for the WMAudio library state */
typedef struct tagWMAFileStateInternal
{
    tWMAFileHdrStateInternal hdr_parse;

    /* parse_state */
    
    tWMAParseState parse_state;

    /* payload parsing */

    DWORD cbPayloadOffset;
    DWORD cbPayloadLeft;

    BOOL  bBlockStart;
    DWORD cbBlockLeft;

    /* packet parsing */

    PACKET_PARSE_INFO_EX ppex;

    PAYLOAD_MAP_ENTRY_EX payload;
    DWORD iPayload;
    WORD wPayStart;

    /* other states */

    BOOL    bHasDRM;

    DWORD   nSampleCount;

    /* objects */

//    tWMAState wma_state;
//    WMADHANDLE hWMA;
    WMARawDecHandle hWMA;

#ifndef WMAAPI_NO_DRM
    VOID* pDRM_state;
#endif /* WMAAPI_NO_DRM */

#ifndef WMAAPI_NO_DRM_STREAM
    BYTE cbNextPayloadEndValid;
    BYTE rgbNextPayloadEnd[15];
#endif

    
#ifdef USE_WOW_FILTER
    WowChannel sWowChannel;
#endif
    BYTE bDecInWaitState;
    BYTE bAllFramesDone;
    BYTE bFirst;
    BYTE *pCallBackBuffer;
#ifdef USE_MERCURY
    BYTE cbIsUDRMEncrypted;
    void                 *pUDLData;
    BYTE                 cUDLRepSalt[4];
#endif
} tWMAFileStateInternal;


/* ASF parsing functions */

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */


/* use (only) for reading possibly large chunk */
DWORD WMA_GetBuffer(tWMAFileStateInternal *pInt,
                    DWORD cbOffset, DWORD cbWanted, BYTE *pBuffer);

WMAERR WMA_LoadObjectHeader(tWMAFileHdrStateInternal *pInt, GUID *pObjectId, QWORD *pqwSize);
WMAERR WMA_LoadHeaderObject(tWMAFileHdrStateInternal *pInt, int isFull);
WMAERR WMA_LoadPropertiesObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize, int isFull);
WMAERR WMA_LoadAudioObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize, int isFull);
WMAERR WMA_LoadEncryptionObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize);
WMAERR WMA_LoadContentDescriptionObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize);
WMAERR WMA_LoadExtendedContentDescObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize);

WMAERR WMA_ParseAsfHeader(tWMAFileHdrStateInternal *pInt, int isFull);
WMAERR WMA_ParsePacketHeader(tWMAFileStateInternal *pInt);
WMAERR WMA_ParsePayloadHeader(tWMAFileStateInternal *pInt);

WMAERR WMA_GetMarkerObject(tWMAFileHdrStateInternal *pInt, int k);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* _WMAUDIO_IMPL_H_ */