Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 89 insertions, 0 deletions

diff --git a/libSBRenc/src/nf_est.h b/libSBRenc/src/nf_est.h
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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