qc_data.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
provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
modifications thereto to recipients of copies in binary form.

The name of Fraunhofer may not be used to endorse or promote products derived from this library without
prior written permission.

You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
software or your modifications thereto.

Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
and the date of any change. For modified versions of the FDK AAC Codec, the term
"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."

3.    NO PATENT LICENSE

NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
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
by appropriate patent licenses.

4.    DISCLAIMER

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
of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
or business interruption, however caused and on any theory of liability, whether in contract, strict
liability, or tort (including negligence), arising in any way out of the use of this software, even if
advised of the possibility of such damage.

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. Werner
   contents/description: Quantizing & coding data

******************************************************************************/

#ifndef _QC_DATA_H
#define _QC_DATA_H

#include "psy_const.h"
#include "dyn_bits.h"
#include "adj_thr_data.h"
#include "line_pe.h"
#include "FDK_audio.h"
#include "interface.h"

typedef enum {
  QCDATA_BR_MODE_INVALID = -1,
  QCDATA_BR_MODE_CBR     =  0,
  QCDATA_BR_MODE_VBR_1   =  1, /* 32 kbps/channel */
  QCDATA_BR_MODE_VBR_2   =  2, /* 40 kbps/channel */
  QCDATA_BR_MODE_VBR_3   =  3, /* 48 kbps/channel */
  QCDATA_BR_MODE_VBR_4   =  4, /* 64 kbps/channel */
  QCDATA_BR_MODE_VBR_5   =  5, /* 96 kbps/channel */
  QCDATA_BR_MODE_FF      =  6,  /* Fixed frame mode. */
  QCDATA_BR_MODE_SFR     =  7  /* Superframe mode. */

} QCDATA_BR_MODE;

typedef struct {
  MP4_ELEMENT_ID elType;
  INT instanceTag;
  INT nChannelsInEl;
  INT ChannelIndex[2];
  FIXP_DBL relativeBits;
} ELEMENT_INFO;

typedef struct {
  CHANNEL_MODE encMode;
  INT nChannels;
  INT nChannelsEff;
  INT nElements;
  ELEMENT_INFO elInfo[(8)];
} CHANNEL_MAPPING;

typedef struct {
  INT paddingRest;
} PADDING;

/* Quantizing & coding stage */

struct QC_INIT{
  CHANNEL_MAPPING* channelMapping;
  INT sceCpe;      /* not used yet                         */
  INT maxBits;     /* maximum number of bits in reservoir  */
  INT averageBits; /* average number of bits we should use */
  INT bitRes;
  INT sampleRate;       /* output sample rate                   */
  INT advancedBitsToPe; /* if set, calc bits2PE factor depending on samplerate */
  INT staticBits;  /* Bits per frame consumed by transport layers. */
  QCDATA_BR_MODE bitrateMode;
  INT meanPe;
  INT chBitrate;
  INT invQuant;
  INT maxIterations; /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */
  FIXP_DBL maxBitFac;
  INT bitrate;
  INT nSubFrames; /* helper variable */
  INT minBits;    /* minimal number of bits in one frame*/

PADDING padding;
};

typedef struct
{
  FIXP_DBL      mdctSpectrum[(1024)];

SHORT         quantSpec[(1024)];

UINT          maxValueInSfb[MAX_GROUPED_SFB];
  INT           scf[MAX_GROUPED_SFB];
  INT           globalGain;
  SECTION_DATA  sectionData;

FIXP_DBL      sfbFormFactorLdData[MAX_GROUPED_SFB];

FIXP_DBL      sfbThresholdLdData[MAX_GROUPED_SFB];
  FIXP_DBL      sfbMinSnrLdData[MAX_GROUPED_SFB];
  FIXP_DBL      sfbEnergyLdData[MAX_GROUPED_SFB];
  FIXP_DBL      sfbEnergy[MAX_GROUPED_SFB];
  FIXP_DBL      sfbWeightedEnergyLdData[MAX_GROUPED_SFB];

FIXP_DBL      sfbEnFacLd[MAX_GROUPED_SFB];

FIXP_DBL      sfbSpreadEnergy[MAX_GROUPED_SFB];

} QC_OUT_CHANNEL;

typedef struct
{
  EXT_PAYLOAD_TYPE  type;  /* type of the extension payload */
  INT    nPayloadBits;     /* size of the payload */
  UCHAR *pPayload;         /* pointer to payload */

} QC_OUT_EXTENSION;

typedef struct
{
  INT          staticBitsUsed; /* for verification purposes */
  INT          dynBitsUsed;    /* for verification purposes */

INT          extBitsUsed;    /* bit consumption of extended fill elements */
  INT          nExtensions;    /* number of extension payloads for this element */
  QC_OUT_EXTENSION extension[(1)];  /* reffering extension payload */

INT          grantedDynBits;

INT          grantedPe;
  INT          grantedPeCorr;

PE_DATA      peData;

QC_OUT_CHANNEL *qcOutChannel[(2)];

} QC_OUT_ELEMENT;

typedef struct
{
  QC_OUT_ELEMENT    *qcElement[(8)];
  QC_OUT_CHANNEL    *pQcOutChannels[(8)];
  QC_OUT_EXTENSION   extension[(2+2)];  /* global extension payload */
  INT          nExtensions;       /* number of extension payloads for this AU */
  INT          maxDynBits;        /* maximal allowed dynamic bits in frame */
  INT          grantedDynBits;    /* granted dynamic bits in frame */
  INT          totFillBits;       /* fill bits */
  INT          elementExtBits;    /* element associated extension payload bits, e.g. sbr, drc ... */
  INT          globalExtBits;     /* frame/au associated extension payload bits (anc data ...) */
  INT          staticBits;        /* aac side info bits */

INT          totalNoRedPe;
  INT          totalGrantedPeCorr;

INT          usedDynBits;       /* number of dynamic bits in use */
  INT          alignBits;         /* AU alignment bits */
  INT          totalBits;         /* sum of static, dyn, sbr, fill, align and dse bits */

} QC_OUT;

typedef struct {
  INT chBitrateEl;                    /* channel bitrate in element (totalbitrate*el_relativeBits/el_channels) */
  INT maxBitsEl;                      /* used in crash recovery */
  INT bitResLevelEl;                  /* update bitreservoir level in each call of FDKaacEnc_QCMain */
  INT maxBitResBitsEl;                /* nEffChannels*6144 - averageBitsInFrame */
  FIXP_DBL relativeBitsEl;            /* Bits relative to total Bits*/
} ELEMENT_BITS;

typedef struct
{
  /* this is basically struct QC_INIT */

INT globHdrBits;
  INT maxBitsPerFrame;   /* maximal allowed bits per frame, 6144*nChannelsEff */
  INT minBitsPerFrame;   /* minimal allowd bits per fram, superframing - DRM */
  INT nElements;
  QCDATA_BR_MODE bitrateMode;
  INT bitDistributionMode; /* 0: full bitreservoir, 1: reduced bitreservoir, 2: disabled bitreservoir */
  INT bitResTot;
  INT bitResTotMax;
  INT maxIterations;      /* Maximum number of allowed iterations before FDKaacEnc_crashRecovery() is applied. */
  INT invQuant;

FIXP_DBL vbrQualFactor;
  FIXP_DBL maxBitFac;

PADDING padding;

ELEMENT_BITS  *elementBits[(8)];
  BITCNTR_STATE *hBitCounter;
  ADJ_THR_STATE *hAdjThr;

} QC_STATE;

#endif /* _QC_DATA_H */

C++程序 | 279行 | 10.17 KB

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