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/****************************************************************************
(C) Copyright Fraunhofer IIS (2004)
All Rights Reserved
Please be advised that this software and/or program delivery is
Confidential Information of Fraunhofer and subject to and covered by the
Fraunhofer IIS Software Evaluation Agreement
between Google Inc. and Fraunhofer
effective and in full force since March 1, 2012.
You may use this software and/or program only under the terms and
conditions described in the above mentioned Fraunhofer IIS Software
Evaluation Agreement. Any other and/or further use requires a separate agreement.
This software and/or program is protected by copyright law and international
treaties. Any reproduction or distribution of this software and/or program,
or any portion of it, may result in severe civil and criminal penalties, and
will be prosecuted to the maximum extent possible under law.
$Id$
*******************************************************************************/
/*!
\file
\brief Envelope calculation prototypes $Revision: 36841 $
*/
#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
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