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-
-/* -----------------------------------------------------------------------------------------------------------
-Software License for The Fraunhofer FDK AAC Codec Library for Android
-
-© Copyright 1995 - 2013 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
------------------------------------------------------------------------------------------------------------ */
-
-/*!
- \file
- \brief Envelope calculation prototypes
-*/
-#ifndef __ENV_CALC_H
-#define __ENV_CALC_H
-
-#include "sbrdecoder.h"
-#include "env_extr.h" /* for HANDLE_SBR_HEADER_DATA */
-#include "sbr_scale.h"
-
-
-typedef struct
-{
- FIXP_DBL filtBuffer[MAX_FREQ_COEFFS]; /*!< previous gains (required for smoothing) */
- FIXP_DBL filtBufferNoise[MAX_FREQ_COEFFS]; /*!< previous noise levels (required for smoothing) */
- SCHAR filtBuffer_e[MAX_FREQ_COEFFS]; /*!< Exponents of previous gains */
- SCHAR filtBufferNoise_e; /*!< Common exponent of previous noise levels */
-
- int startUp; /*!< flag to signal initial conditions in buffers */
- int phaseIndex; /*!< Index for randomPase array */
- int prevTranEnv; /*!< The transient envelope of the previous frame. */
-
- int harmFlagsPrev[(MAX_FREQ_COEFFS+15)/16];
- /*!< Words with 16 flags each indicating where a sine was added in the previous frame.*/
- UCHAR harmIndex; /*!< Current phase of synthetic sine */
-
-}
-SBR_CALCULATE_ENVELOPE;
-
-typedef SBR_CALCULATE_ENVELOPE *HANDLE_SBR_CALCULATE_ENVELOPE;
-
-
-
-void
-calculateSbrEnvelope (QMF_SCALE_FACTOR *sbrScaleFactor,
- HANDLE_SBR_CALCULATE_ENVELOPE h_sbr_cal_env,
- HANDLE_SBR_HEADER_DATA hHeaderData,
- HANDLE_SBR_FRAME_DATA hFrameData,
- FIXP_DBL **analysBufferReal,
- FIXP_DBL **analysBufferImag, /*!< Imag part of subband samples to be processed */
- const int useLP,
- FIXP_DBL *degreeAlias, /*!< Estimated aliasing for each QMF channel */
- const UINT flags,
- const int frameErrorFlag
- );
-
-SBR_ERROR
-createSbrEnvelopeCalc (HANDLE_SBR_CALCULATE_ENVELOPE hSbrCalculateEnvelope,
- HANDLE_SBR_HEADER_DATA hHeaderData,
- const int chan,
- const UINT flags);
-
-int
-deleteSbrEnvelopeCalc (HANDLE_SBR_CALCULATE_ENVELOPE hSbrCalculateEnvelope);
-
-void
-resetSbrEnvelopeCalc (HANDLE_SBR_CALCULATE_ENVELOPE hCalEnv);
-
-SBR_ERROR
-ResetLimiterBands ( UCHAR *limiterBandTable,
- UCHAR *noLimiterBands,
- UCHAR *freqBandTable,
- int noFreqBands,
- const PATCH_PARAM *patchParam,
- int noPatches,
- int limiterBands);
-
-void rescaleSubbandSamples( FIXP_DBL ** re,
- FIXP_DBL ** im,
- int lowSubband, int noSubbands,
- int start_pos, int next_pos,
- int shift);
-
-FIXP_DBL maxSubbandSample( FIXP_DBL ** analysBufferReal_m,
- FIXP_DBL ** analysBufferImag_m,
- int lowSubband,
- int highSubband,
- int start_pos,
- int stop_pos);
-
-#endif // __ENV_CALC_H