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authorThe Android Open Source Project <initial-contribution@android.com>2012-07-11 10:15:24 -0700
committerThe Android Open Source Project <initial-contribution@android.com>2012-07-11 10:15:24 -0700
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tree57f3d390ebb0782cc0de0fb984c8ea7e45b4f386 /libAACenc/src/psy_configuration.h
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+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+ All rights reserved.
+
+ 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: Psychoaccoustic configuration
+
+******************************************************************************/
+
+#ifndef _PSY_CONFIGURATION_H
+#define _PSY_CONFIGURATION_H
+
+
+#include "aacenc.h"
+#include "common_fix.h"
+
+#include "psy_const.h"
+#include "aacenc_tns.h"
+#include "aacenc_pns.h"
+
+#define THR_SHIFTBITS 4
+#define PCM_QUANT_THR_SCALE 16
+
+#define C_RATIO (FIXP_DBL)0x02940a10 /* FL2FXCONST_DBL(0.001258925f) << THR_SHIFTBITS; */ /* pow(10.0f, -(29.0f/10.0f)) */
+
+typedef struct{
+
+ INT sfbCnt; /* number of existing sf bands */
+ INT sfbActive; /* number of sf bands containing energy after lowpass */
+ INT sfbActiveLFE;
+ INT sfbOffset[MAX_SFB+1];
+
+ INT filterbank; /* LC, LD or ELD */
+
+ FIXP_DBL sfbPcmQuantThreshold[MAX_SFB];
+
+ INT maxAllowedIncreaseFactor; /* preecho control */
+ FIXP_SGL minRemainingThresholdFactor;
+
+ INT lowpassLine;
+ INT lowpassLineLFE;
+ FIXP_DBL clipEnergy; /* for level dependend tmn */
+
+ FIXP_DBL sfbMaskLowFactor[MAX_SFB];
+ FIXP_DBL sfbMaskHighFactor[MAX_SFB];
+
+ FIXP_DBL sfbMaskLowFactorSprEn[MAX_SFB];
+ FIXP_DBL sfbMaskHighFactorSprEn[MAX_SFB];
+
+ FIXP_DBL sfbMinSnrLdData[MAX_SFB]; /* minimum snr (formerly known as bmax) */
+
+ TNS_CONFIG tnsConf;
+ PNS_CONFIG pnsConf;
+
+ INT granuleLength;
+ INT allowIS;
+
+}PSY_CONFIGURATION;
+
+
+typedef struct{
+ UCHAR sfbCnt; /* Number of scalefactor bands */
+ UCHAR sfbWidth[MAX_SFB_LONG]; /* Width of scalefactor bands for long blocks */
+}SFB_PARAM_LONG;
+
+typedef struct{
+ UCHAR sfbCnt; /* Number of scalefactor bands */
+ UCHAR sfbWidth[MAX_SFB_SHORT]; /* Width of scalefactor bands for short blocks */
+}SFB_PARAM_SHORT;
+
+
+AAC_ENCODER_ERROR FDKaacEnc_InitPsyConfiguration(INT bitrate,
+ INT samplerate,
+ INT bandwidth,
+ INT blocktype,
+ INT granuleLength,
+ INT useIS,
+ PSY_CONFIGURATION *psyConf,
+ FB_TYPE filterbank);
+
+#endif /* _PSY_CONFIGURATION_H */
+
+
+