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Diffstat (limited to 'libSBRdec/src/env_calc.h')
| -rw-r--r-- | libSBRdec/src/env_calc.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/libSBRdec/src/env_calc.h b/libSBRdec/src/env_calc.h new file mode 100644 index 0000000..ef14996 --- /dev/null +++ b/libSBRdec/src/env_calc.h @@ -0,0 +1,107 @@ +/**************************************************************************** + + (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 |