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authorDave Burke <daveburke@google.com>2012-04-17 09:51:45 -0700
committerDave Burke <daveburke@google.com>2012-04-17 23:04:43 -0700
commit9bf37cc9712506b2483650c82d3c41152337ef7e (patch)
tree77db44e2bae06e3d144b255628be2b7a55c581d3 /libSBRenc/src/nf_est.h
parenta37315fe10ee143d6d0b28c19d41a476a23e63ea (diff)
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Fraunhofer AAC codec.
License boilerplate update to follow. Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5
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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 Noise floor estimation structs and prototypes $Revision: 36867 $
+*/
+
+#ifndef __NF_EST_H
+#define __NF_EST_H
+
+#include "sbr_encoder.h"
+#include "fram_gen.h"
+
+#define NF_SMOOTHING_LENGTH 4 /*!< Smoothing length of the noise floors. */
+
+typedef struct
+{
+ FIXP_DBL prevNoiseLevels[NF_SMOOTHING_LENGTH][MAX_NUM_NOISE_VALUES]; /*!< The previous noise levels. */
+ FIXP_DBL noiseFloorOffset[MAX_NUM_NOISE_VALUES]; /*!< Noise floor offset, scaled with NOISE_FLOOR_OFFSET_SCALING */
+ const FIXP_DBL *smoothFilter; /*!< Smoothing filter to use. */
+ FIXP_DBL ana_max_level; /*!< Max level allowed. */
+ FIXP_DBL weightFac; /*!< Weightening factor for the difference between orig and sbr. */
+ INT freqBandTableQmf[MAX_NUM_NOISE_VALUES + 1]; /*!< Frequncy band table for the noise floor bands.*/
+ INT noNoiseBands; /*!< Number of noisebands. */
+ INT noiseBands; /*!< NoiseBands switch 4 bit.*/
+ INT timeSlots; /*!< Number of timeslots in a frame. */
+ INVF_MODE diffThres; /*!< Threshold value to control the inverse filtering decision */
+}
+SBR_NOISE_FLOOR_ESTIMATE;
+
+typedef SBR_NOISE_FLOOR_ESTIMATE *HANDLE_SBR_NOISE_FLOOR_ESTIMATE;
+
+void
+FDKsbrEnc_sbrNoiseFloorEstimateQmf(HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */
+ const SBR_FRAME_INFO *frame_info, /*!< Time frequency grid of the current frame. */
+ FIXP_DBL *noiseLevels, /*!< Pointer to vector to store the noise levels in.*/
+ FIXP_DBL **quotaMatrixOrig, /*!< Matrix holding the quota values of the original. */
+ SCHAR* indexVector, /*!< Index vector to obtain the patched data. */
+ INT missingHarmonicsFlag, /*!< Flag indicating if a strong tonal component will be missing. */
+ INT startIndex, /*!< Start index. */
+ int numberOfEstimatesPerFrame, /*!< The number of tonality estimates per frame. */
+ INT transientFrame, /*!< A flag indicating if a transient is present. */
+ INVF_MODE* pInvFiltLevels, /*!< Pointer to the vector holding the inverse filtering levels. */
+ UINT sbrSyntaxFlags
+ );
+
+INT
+FDKsbrEnc_InitSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */
+ INT ana_max_level, /*!< Maximum level of the adaptive noise. */
+ const UCHAR *freqBandTable, /*!< Frequany band table. */
+ INT nSfb, /*!< Number of frequency bands. */
+ INT noiseBands, /*!< Number of noise bands per octave. */
+ INT noiseFloorOffset, /*!< Noise floor offset. */
+ INT timeSlots, /*!< Number of time slots in a frame. */
+ UINT useSpeechConfig /*!< Flag: adapt tuning parameters according to speech */
+ );
+
+INT
+FDKsbrEnc_resetSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */
+ const UCHAR *freqBandTable, /*!< Frequany band table. */
+ INT nSfb); /*!< Number of bands in the frequency band table. */
+
+void
+FDKsbrEnc_deleteSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate); /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */
+
+#endif