wmaud_ty.h

来自「ESS3890+SL原代码（1*16内存）」· C头文件 代码 · 共 175 行

/* Copyright 1997, ESS Technology, Inc.                                 */
/* SCCSID @(#)wmaud_ty.h	1.1 01/23/02 */

/* Based on DVD code version  	1.16 10/12/01 */

#ifndef _WMAUDIO_IMPL_H_
#define _WMAUDIO_IMPL_H_

#include "wmaerr.h"
#include "wmatypes.h"
#include "wmaudio.h"
#define MIN_OBJECT_SIZE     24
#define DATA_OBJECT_SIZE    50


/* 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 */

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

#if 1
    /* DRM */

    BYTE    pbSecretData[32];
#endif
    DWORD   cbSecretData;
#if 1
    BYTE    pbType[16];
    BYTE    pbKeyID[32];
#endif

    /* Content Description */

    DWORD   cbCDOffset;
    DWORD    cbCDTitle;
    DWORD    cbCDAuthor;
    DWORD    cbCDCopyright;
    DWORD    cbCDDescription;
    DWORD    cbCDRating;
#if 1
    /* Extended Content Description */

    tWMAExtendedContentDesc m_pECDesc;
#endif
    /* Marker */
    DWORD   m_dwMarkerNum;
#if 0
    MarkerEntry *m_pMarker;
#endif
#if 0
    /* License Store */
    BYTE   *m_pLicData;
#endif
    DWORD   m_dwLicenseLen;

/* Members added by Amit  */
    DWORD	wAudioStreamId;
} tWMAFileHdrStateInternal;


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

    /* parse_state */
    
    tWMAParseState parse_state;

    /* payload parsing */

    DWORD cbPayloadOffset;
    DWORD cbPayloadLeft;

    BOOL1  bBlockStart;
    DWORD cbBlockLeft;

    /* packet parsing */
    PACKET_PARSE_INFO_EX ppex;
    PAYLOAD_MAP_ENTRY_EX payload;
    DWORD iPayload;
    WORD wPayStart;
    /* other states */

    BOOL1    bHasDRM;
#if 0
    DWORD   nSampleCount;

    /* objects */

    WMARawDecHandle hWMA;
#endif


	BYTE bDecInWaitState;
	BYTE bAllFramesDone;
	BYTE bFirst;
#if 0
    BYTE *pCallBackBuffer;
#endif
} tWMAFileStateInternal;


/* ASF parsing functions */

#if 0
/* use (only) for reading possibly large chunk */
DWORD WMA_GetBuffer(tWMAFileStateInternal *pInt,
                    DWORD cbOffset, DWORD cbWanted, BYTE *pBuffer);
#endif

void WMA_LoadObjectHeader(tWMAFileHdrStateInternal *pInt);
WMAERR WMA_LoadHeaderObject(tWMAFileHdrStateInternal *pInt);
WMAERR WMA_LoadPropertiesObject(tWMAFileHdrStateInternal *pInt, int cbSize);
WMAERR WMA_LoadAudioObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize);
WMAERR WMA_LoadEncryptionObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize);
WMAERR WMA_LoadContentDescriptionObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize);
WMAERR WMA_LoadExtendedContentDescObject(tWMAFileHdrStateInternal *pInt, DWORD cbSize);

WMAERR WMA_LoadScriptCommandObject( tWMAFileHdrStateInternal *pInt, int cbSize);

#if 0
WMAERR WMA_ParseAsfHeader(tWMAFileHdrStateInternal *pInt, int isFull);
WMAERR WMA_ParsePacketHeader(tWMAFileStateInternal *pInt);
WMAERR WMA_ParsePayloadHeader(tWMAFileStateInternal *pInt);

WMAERR WMA_GetMarkerObject(tWMAFileHdrStateInternal *pInt, int k);
#endif /* if 0 */
#endif /* _WMAUDIO_IMPL_H_ */