bitenc.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: Bitstream encoder

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

#ifndef _BITENC_H
#define _BITENC_H

#include "qc_data.h"
#include "aacenc_tns.h"
#include "channel_map.h"
#include "interface.h"    /* obsolete, when PSY_OUT is thrown out of the WritBS-call! */
#include "FDK_audio.h"
#include "aacenc.h"

#include "tpenc_lib.h"

typedef enum{
  MAX_ENCODER_CHANNELS  = 9,
  MAX_BLOCK_TYPES       = 4,
  MAX_AAC_LAYERS        = 9,
  MAX_LAYERS            = MAX_AAC_LAYERS  , /* only one core layer if present */
  FIRST_LAY             = 1   /* default layer number for AAC nonscalable */
} _MAX_CONST;

#define BUFFER_MX_HUFFCB_SIZE (32*sizeof(INT))  /* our FDK_bitbuffer needs size of power 2 */

#define EL_ID_BITS  ( 3 )

/**
 * \brief Arbitrary order bitstream writer. This function can either assemble a bit stream
 *        and write into the bit buffer of hTpEnc or calculate the number of static bits (signal independent)
 *        TpEnc handle must be NULL in this case. Or also Calculate the minimum possible number of
 *        static bits which by disabling all tools e.g. MS, TNS and sbfCnt=0. The minCnt parameter
 *        has to be 1 in this latter case.
 * \param hTpEnc Transport encoder handle. If NULL, the number of static bits will be returned into
 *        *pBitDemand.
 * \param pElInfo
 * \param qcOutChannel
 * \param hReorderInfo
 * \param psyOutElement
 * \param psyOutChannel
 * \param syntaxFlags Bit stream syntax flags as defined in FDK_audio.h (Audio Codec flags).
 * \param aot
 * \param epConfig
 * \param pBitDemand Pointer to an int where the amount of bits is returned into. The returned value
 *        depends on if hTpEnc is NULL and minCnt.
 * \param minCnt If non-zero the value returned into *pBitDemand is the absolute minimum required amount of
 *        static bits in order to write a valid bit stream.
 * \return AAC_ENCODER_ERROR error code
 */
AAC_ENCODER_ERROR FDKaacEnc_ChannelElementWrite( HANDLE_TRANSPORTENC  hTpEnc,
                                                 ELEMENT_INFO        *pElInfo,
                                                 QC_OUT_CHANNEL      *qcOutChannel[(2)],
                                                 PSY_OUT_ELEMENT     *psyOutElement,
                                                 PSY_OUT_CHANNEL     *psyOutChannel[(2)],
                                                 UINT                 syntaxFlags,
                                                 AUDIO_OBJECT_TYPE    aot,
                                                 SCHAR                epConfig,
                                                 INT                 *pBitDemand,
                                                 UCHAR                minCnt
                                               );
/**
 * \brief Write bit stream or account static bits
 * \param hTpEnc transport encoder handle. If NULL, the function will
 *        not write any bit stream data but only count the amount
 *        of static (signal independent) bits
 * \param channelMapping Channel mapping info
 * \param qcOut
 * \param psyOut
 * \param qcKernel
 * \param hBSE
 * \param aot Audio Object Type being encoded
 * \param syntaxFlags Flags indicating format specific detail
 * \param epConfig Error protection config
 */
AAC_ENCODER_ERROR FDKaacEnc_WriteBitstream (HANDLE_TRANSPORTENC hTpEnc,
                                            CHANNEL_MAPPING *channelMapping,
                                            QC_OUT* qcOut,
                                            PSY_OUT* psyOut,
                                            QC_STATE* qcKernel,
                                            AUDIO_OBJECT_TYPE  aot,
                                            UINT  syntaxFlags,
                                            SCHAR  epConfig
                                           );

INT FDKaacEnc_writeExtensionData( HANDLE_TRANSPORTENC  hTpEnc,
                                  QC_OUT_EXTENSION    *pExtension,
                                  INT                  elInstanceTag,
                                  UINT                 alignAnchor,
                                  UINT                 syntaxFlags,
                                  AUDIO_OBJECT_TYPE    aot,
                                  SCHAR                epConfig
                                );

#endif /* _BITENC_H */

C++程序 | 184行 | 8.99 KB

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