xref: /external/aac/libSBRenc/src/ton_corr.h

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----------------------------------------------------------------------------------------------------------- */

/*!
  \file
  \brief  General tonality correction detector module.
*/
#ifndef _TON_CORR_EST_H
#define _TON_CORR_EST_H

#include "sbr_encoder.h"
#include "mh_det.h"
#include "nf_est.h"
#include "invf_est.h"


#define MAX_NUM_PATCHES 6
#define SCALE_NRGVEC 4

/** parameter set for one single patch */
typedef struct {
  INT    sourceStartBand;         /*!< first band in lowbands where to take the samples from */
  INT    sourceStopBand;          /*!< first band in lowbands which is not included in the patch anymore */
  INT    guardStartBand;          /*!< first band in highbands to be filled with zeros in order to
                                         reduce interferences between patches */
  INT    targetStartBand;         /*!< first band in highbands to be filled with whitened lowband signal */
  INT    targetBandOffs;          /*!< difference between 'startTargetBand' and 'startSourceBand' */
  INT    numBandsInPatch;         /*!< number of consecutive bands in this one patch */
} PATCH_PARAM;




typedef struct
{
  INT switchInverseFilt;          /*!< Flag to enable dynamic adaption of invf. detection */
  INT noQmfChannels;
  INT bufferLength;               /*!< Length of the r and i buffers. */
  INT stepSize;                   /*!< Stride for the lpc estimate. */
  INT numberOfEstimates;          /*!< The total number of estiamtes, available in the quotaMatrix.*/
  INT numberOfEstimatesPerFrame;  /*!< The number of estimates per frame available in the quotaMatrix.*/
  INT lpcLength[2];               /*!< Segment length used for second order LPC analysis.*/
  INT nextSample;                 /*!< Where to start the LPC analysis of the current frame.*/
  INT move;                       /*!< How many estimates to move in the quotaMatrix, when buffering. */
  INT frameStartIndex;            /*!< The start index for the current frame in the r and i buffers. */
  INT startIndexMatrix;           /*!< The start index for the current frame in the quotaMatrix. */
  INT frameStartIndexInvfEst;     /*!< The start index of the inverse filtering, not the same as the others,
                                       dependent on what decoder is used (buffer opt, or no buffer opt). */
  INT prevTransientFlag;          /*!< The transisent flag (from the transient detector) for the previous frame. */
  INT transientNextFrame;         /*!< Flag to indicate that the transient will show up in the next frame. */
  INT transientPosOffset;         /*!< An offset value to match the transient pos as calculated by the transient detector
                                       with the actual position in the frame.*/

  INT *signMatrix[MAX_NO_OF_ESTIMATES];      /*!< Matrix holding the sign of each channe, i.e. indicating in what
                                                  part of a QMF channel a possible sine is. */

  FIXP_DBL *quotaMatrix[MAX_NO_OF_ESTIMATES];/*!< Matrix holding the quota values for all estimates, all channels. */

  FIXP_DBL nrgVector[MAX_NO_OF_ESTIMATES];   /*!< Vector holding the averaged energies for every QMF band. */
  FIXP_DBL nrgVectorFreq[QMF_CHANNELS];      /*!< Vector holding the averaged energies for every QMF channel */

  SCHAR indexVector[QMF_CHANNELS];           /*!< Index vector poINTing to the correct lowband channel,
                                                  when indexing a highband channel, -1 represents a guard band */
  PATCH_PARAM  patchParam[MAX_NUM_PATCHES];  /*!< new parameter set for patching */
  INT    guard;                              /*!< number of guardbands between every patch */
  INT    shiftStartSb;                       /*!< lowest subband of source range to be included in the patches */
  INT    noOfPatches;                        /*!< number of patches */

  SBR_MISSING_HARMONICS_DETECTOR sbrMissingHarmonicsDetector;  /*!< SBR_MISSING_HARMONICS_DETECTOR struct. */
  SBR_NOISE_FLOOR_ESTIMATE sbrNoiseFloorEstimate;              /*!< SBR_NOISE_FLOOR_ESTIMATE struct. */
  SBR_INV_FILT_EST sbrInvFilt;                                 /*!< SBR_INV_FILT_EST struct. */
}
SBR_TON_CORR_EST;

typedef SBR_TON_CORR_EST *HANDLE_SBR_TON_CORR_EST;

void
FDKsbrEnc_TonCorrParamExtr(HANDLE_SBR_TON_CORR_EST hTonCorr,   /*!< Handle to SBR_TON_CORR struct. */
                 INVF_MODE* infVec,                  /*!< Vector where the inverse filtering levels will be stored. */
                 FIXP_DBL * noiseLevels,             /*!< Vector where the noise levels will be stored. */
                 INT* missingHarmonicFlag,           /*!< Flag set to one or zero, dependent on if any strong sines are missing.*/
                 UCHAR* missingHarmonicsIndex,       /*!< Vector indicating where sines are missing. */
                 UCHAR* envelopeCompensation,        /*!< Vector to store compensation values for the energies in. */
                 const SBR_FRAME_INFO *frameInfo,    /*!< Frame info struct, contains the time and frequency grid of the current frame.*/
                 UCHAR* transientInfo,               /*!< Transient info.*/
                 UCHAR * freqBandTable,              /*!< Frequency band tables for high-res.*/
                 INT nSfb,                           /*!< Number of scalefactor bands for high-res. */
                 XPOS_MODE xposType,                 /*!< Type of transposer used in the decoder.*/
                 UINT sbrSyntaxFlags
                 );

INT
FDKsbrEnc_CreateTonCorrParamExtr(HANDLE_SBR_TON_CORR_EST hTonCorr, /*!< Pointer to handle to SBR_TON_CORR struct. */
                                 INT                     chan);    /*!< Channel index, needed for mem allocation */

INT
FDKsbrEnc_InitTonCorrParamExtr(INT frameSize,                      /*!< Current SBR frame size. */
                               HANDLE_SBR_TON_CORR_EST hTonCorr,   /*!< Pointer to handle to SBR_TON_CORR struct. */
                               HANDLE_SBR_CONFIG_DATA sbrCfg,      /*!< Pointer to SBR configuration parameters. */
                               INT timeSlots,                      /*!< Number of time-slots per frame */
                               INT xposCtrl,                       /*!< Different patch modes. */
                               INT ana_max_level,                  /*!< Maximum level of the adaptive noise. */
                               INT noiseBands,                     /*!< Number of noise bands per octave. */
                               INT noiseFloorOffset,               /*!< Noise floor offset. */
                               UINT useSpeechConfig                /*!< Speech or music tuning. */
                              );

void
FDKsbrEnc_DeleteTonCorrParamExtr(HANDLE_SBR_TON_CORR_EST hTonCorr); /*!< Handle to SBR_TON_CORR struct. */


void
FDKsbrEnc_CalculateTonalityQuotas(HANDLE_SBR_TON_CORR_EST hTonCorr,
                        FIXP_DBL **sourceBufferReal,
                        FIXP_DBL **sourceBufferImag,
                        INT usb,
                        INT qmfScale                    /*!< sclefactor of QMF subsamples */
                       );

INT
FDKsbrEnc_ResetTonCorrParamExtr(HANDLE_SBR_TON_CORR_EST hTonCorr, /*!< Handle to SBR_TON_CORR struct. */
                      INT xposctrl,                     /*!< Different patch modes. */
                      INT highBandStartSb,              /*!< Start band of the SBR range. */
                      UCHAR *v_k_master,        /*!< Master frequency table from which all other table are derived.*/
                      INT numMaster,                    /*!< Number of elements in the master table. */
                      INT fs,                           /*!< Sampling frequency (of the SBR part). */
                      UCHAR** freqBandTable,    /*!< Frequency band table for low-res and high-res. */
                      INT* nSfb,                        /*!< Number of frequency bands (hig-res and low-res). */
                      INT noQmfChannels                 /*!< Number of QMF channels. */
                      );
#endif