aacdec.h

瑞星微公司RK27XX系列芯片的SDK开发包

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: aacdec.h,v 1.6 2007/12/24 07:54:35 Lingzhaojun Exp $
 *
 * Portions Copyright (c) 1995-2005 RealNetworks, Inc. All Rights Reserved.
 *
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
 * RealNetworks.  You may not use this file except in compliance with
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable
 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 *
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 *
 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
 * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
 * ENJOYMENT OR NON-INFRINGEMENT.
 *
 * Technology Compatibility Kit Test Suite(s) Location:
 *    http://www.helixcommunity.org/content/tck
 *
 * Contributor(s):
 *
 * ***** END LICENSE BLOCK ***** */

/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker ([e-mail])
 * February 2005
 *
 * aacdec.h - public C API for AAC decoder
 **************************************************************************************/

#ifndef _AACDEC_H
#define _AACDEC_H

#if defined(_WIN32) && !defined(_WIN32_WCE)
#
#elif defined(_WIN32) && defined(_WIN32_WCE) && defined(ARM)
#
#elif defined(_WIN32) && defined(WINCE_EMULATOR)
#
#elif defined (__arm) && defined (__ARMCC_VERSION)
#
#elif defined(_SYMBIAN) && defined(__WINS__)
#
#elif defined(__GNUC__) && defined(__arm__)
#
#elif defined(__GNUC__) && defined(__i386__)
#
#elif defined(_OPENWAVE_SIMULATOR) || defined(_OPENWAVE_ARMULATOR)
#
#else
#error No platform defined. See valid options in aacdec.h
#endif

#ifdef __cplusplus
extern "C"
{
#endif

    /* according to spec (13818-7 section 8.2.2, 14496-3 section 4.5.3)
     * max size of input buffer =
     *    6144 bits =  768 bytes per SCE or CCE-I
     *   12288 bits = 1536 bytes per CPE
     *       0 bits =    0 bytes per CCE-D (uses bits from the SCE/CPE/CCE-I it is coupled to)
     */
#ifndef AAC_MAX_NCHANS    /* if max channels isn't set in makefile, */
#define AAC_MAX_NCHANS  2  /* set to default max number of channels  */
#endif
#define AAC_MAX_NSAMPS  1024
#define AAC_MAINBUF_SIZE (768 * AAC_MAX_NCHANS)

#define AAC_NUM_PROFILES 3
#define AAC_PROFILE_MP  0
#define AAC_PROFILE_LC  1
#define AAC_PROFILE_SSR  2

    /* define these to enable decoder features */
#define AAC_ENABLE_SBR
#define AAC_ENABLE_MPEG4

    enum
    {
        ERR_AAC_NONE                          =   0,
        ERR_AAC_INDATA_UNDERFLOW              =  -1,
        ERR_AAC_NULL_POINTER                  =  -2,
        ERR_AAC_INVALID_ADTS_HEADER           =  -3,
        ERR_AAC_INVALID_ADIF_HEADER           =  -4,
        ERR_AAC_INVALID_FRAME                 =  -5,
        ERR_AAC_MPEG4_UNSUPPORTED             =  -6,
        ERR_AAC_CHANNEL_MAP                   =  -7,
        ERR_AAC_SYNTAX_ELEMENT                =  -8,

        ERR_AAC_DEQUANT                       =  -9,
        ERR_AAC_STEREO_PROCESS                = -10,
        ERR_AAC_PNS                           = -11,
        ERR_AAC_SHORT_BLOCK_DEINT             = -12,
        ERR_AAC_TNS                           = -13,
        ERR_AAC_IMDCT                         = -14,
        ERR_AAC_NCHANS_TOO_HIGH               = -15,

        ERR_AAC_SBR_INIT                      = -16,
        ERR_AAC_SBR_BITSTREAM                 = -17,
        ERR_AAC_SBR_DATA                      = -18,
        ERR_AAC_SBR_PCM_FORMAT                = -19,
        ERR_AAC_SBR_NCHANS_TOO_HIGH           = -20,
        ERR_AAC_SBR_SINGLERATE_UNSUPPORTED    = -21,

        ERR_AAC_RAWBLOCK_PARAMS               = -22,

        ERR_UNKNOWN               = -9999
    };

    typedef struct _AACFrameInfo
    {
        int bitRate;
        int nChans;
        int sampRateCore;
        int sampRateOut;
        int bitsPerSample;
        int outputSamps;
        int profile;
        int tnsUsed;
        int pnsUsed;
    } AACFrameInfo;


    typedef struct
    {
        long             status;

        unsigned short usSampleRate;

        unsigned char ucChannels;

        unsigned long ulLength;

        // The number of samples in each encoded block of audio.
        unsigned short usSamplesPerBlock; // block

        // The length of the file in milliseconds.
        unsigned long ulTimeLength;

        unsigned long ulBitRate;

        // The number of samples that have been encoded/decoded.
        unsigned long ulTimePos;

    } tAAC;

    typedef void *HAACDecoder;

    /* public C API */
    HAACDecoder AACInitDecoder(void);
    void AACFreeDecoder(HAACDecoder hAACDecoder);
    int AACDecode(HAACDecoder hAACDecoder, unsigned char **inbuf, int *bytesLeft, short *outbuf);

    int AACFindSyncWord(unsigned char *buf, int nBytes);
    void AACGetLastFrameInfo(HAACDecoder hAACDecoder, AACFrameInfo *aacFrameInfo);
    int AACSetRawBlockParams(HAACDecoder hAACDecoder, int copyLast, AACFrameInfo *aacFrameInfo);
    int AACFlushCodec(HAACDecoder hAACDecoder);

#ifdef __cplusplus
}
#endif

#endif /* _AACDEC_H */