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4f0d97057c
- Update disclaimer in all source files. - Increment library version in each FDK sub-module. Bug 9428126 Change-Id: I490b96d4ee472246b01483202b0bb4f1e9c2a5d7
188 lines
7.4 KiB
C
188 lines
7.4 KiB
C
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/* -----------------------------------------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
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the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
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This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
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audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
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independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
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of the MPEG specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
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may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
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individually for the purpose of encoding or decoding bit streams in products that are compliant with
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the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
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these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
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software may already be covered under those patent licenses when it is used for those licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
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are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
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applications information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification, are permitted without
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payment of copyright license fees provided that you satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
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your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation and/or other materials
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provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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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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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived from this library without
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prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
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software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
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and the date of any change. For modified versions of the FDK AAC Codec, the term
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"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
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"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
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ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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respect to this software.
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You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
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by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
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"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
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of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
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including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
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or business interruption, however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of this software, even if
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advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------------------------------------- */
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/***************************** MPEG Audio Encoder ***************************
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Initial author: M. Neuendorf, N. Rettelbach, M. Multrus
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contents/description: PS Parameter extraction, encoding
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******************************************************************************/
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/*!
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\file
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\brief PS parameter extraction, encoding functions
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*/
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#ifndef __INCLUDED_PS_ENCODE_H
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#define __INCLUDED_PS_ENCODE_H
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#include "ps_const.h"
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#include "ps_bitenc.h"
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#define IID_SCALE_FT (64.f) /* maxVal in Quant tab is +/- 50 */
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#define IID_SCALE 6 /* maxVal in Quant tab is +/- 50 */
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#define IID_MAXVAL (1<<IID_SCALE)
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#define PS_QUANT_SCALE_FT (64.f) /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 64 */
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#define PS_QUANT_SCALE 6 /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 6 bit */
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#define QMF_GROUPS_LO_RES 12
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#define SUBQMF_GROUPS_LO_RES 10
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#define QMF_GROUPS_HI_RES 18
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#define SUBQMF_GROUPS_HI_RES 30
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typedef struct T_PS_DATA {
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INT iidEnable;
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INT iidEnableLast;
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INT iidQuantMode;
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INT iidQuantModeLast;
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INT iidDiffMode[PS_MAX_ENVELOPES];
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INT iidIdx [PS_MAX_ENVELOPES][PS_MAX_BANDS];
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INT iidIdxLast [PS_MAX_BANDS];
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INT iccEnable;
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INT iccEnableLast;
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INT iccQuantMode;
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INT iccQuantModeLast;
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INT iccDiffMode[PS_MAX_ENVELOPES];
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INT iccIdx [PS_MAX_ENVELOPES][PS_MAX_BANDS];
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INT iccIdxLast [PS_MAX_BANDS];
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INT nEnvelopesLast;
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INT headerCnt;
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INT iidTimeCnt;
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INT iccTimeCnt;
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INT noEnvCnt;
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} PS_DATA, *HANDLE_PS_DATA;
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typedef struct T_PS_ENCODE{
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PS_DATA psData;
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PS_BANDS psEncMode;
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INT nQmfIidGroups;
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INT nSubQmfIidGroups;
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INT iidGroupBorders[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES + 1];
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INT subband2parameterIndex[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES];
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UCHAR iidGroupWidthLd[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES];
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FIXP_DBL iidQuantErrorThreshold;
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UCHAR psBandNrgScale [PS_MAX_BANDS];
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} PS_ENCODE;
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typedef struct T_PS_ENCODE *HANDLE_PS_ENCODE;
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FDK_PSENC_ERROR FDKsbrEnc_CreatePSEncode(
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HANDLE_PS_ENCODE *phPsEncode
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);
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FDK_PSENC_ERROR FDKsbrEnc_InitPSEncode(
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HANDLE_PS_ENCODE hPsEncode,
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const PS_BANDS psEncMode,
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const FIXP_DBL iidQuantErrorThreshold
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);
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FDK_PSENC_ERROR FDKsbrEnc_DestroyPSEncode(
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HANDLE_PS_ENCODE *phPsEncode
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);
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FDK_PSENC_ERROR FDKsbrEnc_PSEncode(
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HANDLE_PS_ENCODE hPsEncode,
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HANDLE_PS_OUT hPsOut,
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UCHAR *dynBandScale,
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UINT maxEnvelopes,
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FIXP_DBL *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2],
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const INT frameSize,
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const INT sendHeader
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);
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#endif
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