Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 154 insertions, 0 deletions

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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.
+
+ $Header$
+
+*******************************************************************************/
+/*!
+  \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
+