ps_encode.h - Android社区 - https://www.androidos.net.cn/

/* -----------------------------------------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android

1.    INTRODUCTION
The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
This FDK AAC Codec software is intended to be used on a wide variety of Android devices.

AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
of the MPEG specifications.

Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
individually for the purpose of encoding or decoding bit streams in products that are compliant with
the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
software may already be covered under those patent licenses when it is used for those licensed purposes only.

Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
applications information and documentation.

2.    COPYRIGHT LICENSE

Redistribution and use in source and binary forms, with or without modification, are permitted without
payment of copyright license fees provided that you satisfy the following conditions:

You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
your modifications thereto in source code form.

You must retain the complete text of this software license in the documentation and/or other materials
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You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
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"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."

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ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
respect to this software.

You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
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5.    CONTACT INFORMATION

Fraunhofer Institute for Integrated Circuits IIS
Attention: Audio and Multimedia Departments - FDK AAC LL
Am Wolfsmantel 33
91058 Erlangen, Germany

www.iis.fraunhofer.de/amm
amm-info@iis.fraunhofer.de
----------------------------------------------------------------------------------------------------------- */

/*****************************  MPEG Audio Encoder  ***************************

Initial author:       M. Neuendorf, N. Rettelbach, M. Multrus
   contents/description: PS Parameter extraction, encoding

******************************************************************************/
/*!
  \file
  \brief  PS parameter extraction, encoding functions  
*/

#ifndef __INCLUDED_PS_ENCODE_H
#define __INCLUDED_PS_ENCODE_H

#include "ps_const.h"
#include "ps_bitenc.h"

#define IID_SCALE_FT      (64.f)    /* maxVal in Quant tab is +/- 50 */
#define IID_SCALE         6         /* maxVal in Quant tab is +/- 50 */
#define IID_MAXVAL        (1<<IID_SCALE)

#define PS_QUANT_SCALE_FT (64.f)     /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 64 */
#define PS_QUANT_SCALE    6          /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 6 bit */

#define QMF_GROUPS_LO_RES      12
#define SUBQMF_GROUPS_LO_RES   10
#define QMF_GROUPS_HI_RES      18
#define SUBQMF_GROUPS_HI_RES   30

typedef struct T_PS_DATA {

INT iidEnable;
  INT iidEnableLast;
  INT iidQuantMode;
  INT iidQuantModeLast;
  INT iidDiffMode[PS_MAX_ENVELOPES];
  INT iidIdx     [PS_MAX_ENVELOPES][PS_MAX_BANDS];
  INT iidIdxLast [PS_MAX_BANDS];

INT iccEnable;
  INT iccEnableLast;
  INT iccQuantMode;
  INT iccQuantModeLast;
  INT iccDiffMode[PS_MAX_ENVELOPES];
  INT iccIdx     [PS_MAX_ENVELOPES][PS_MAX_BANDS];
  INT iccIdxLast [PS_MAX_BANDS];

INT nEnvelopesLast;

INT headerCnt;
  INT iidTimeCnt;
  INT iccTimeCnt;
  INT noEnvCnt;

} PS_DATA, *HANDLE_PS_DATA;

typedef struct T_PS_ENCODE{

PS_DATA         psData;

PS_BANDS        psEncMode;
  INT             nQmfIidGroups;
  INT             nSubQmfIidGroups;
  INT             iidGroupBorders[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES + 1];
  INT             subband2parameterIndex[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES];
  UCHAR           iidGroupWidthLd[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES];
  FIXP_DBL        iidQuantErrorThreshold;

UCHAR           psBandNrgScale [PS_MAX_BANDS];

} PS_ENCODE;

typedef struct T_PS_ENCODE *HANDLE_PS_ENCODE;

FDK_PSENC_ERROR FDKsbrEnc_CreatePSEncode(
        HANDLE_PS_ENCODE         *phPsEncode
        );

FDK_PSENC_ERROR FDKsbrEnc_InitPSEncode(
        HANDLE_PS_ENCODE          hPsEncode,
        const PS_BANDS            psEncMode,
        const FIXP_DBL            iidQuantErrorThreshold
        );

FDK_PSENC_ERROR FDKsbrEnc_DestroyPSEncode(
        HANDLE_PS_ENCODE         *phPsEncode
        );

FDK_PSENC_ERROR FDKsbrEnc_PSEncode(
        HANDLE_PS_ENCODE          hPsEncode,
        HANDLE_PS_OUT             hPsOut,
        UCHAR                    *dynBandScale,
        UINT                      maxEnvelopes,
        FIXP_DBL                 *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2],
        const INT                 frameSize,
        const INT                 sendHeader
        );

#endif

C++程序 | 188行 | 7.42 KB

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