Snapshot 2bda038c163298531d47394bc2c09e1409c5d0db

Change-Id: If584e579464f28b97d50e51fc76ba654a5536c54

1 files changed, 198 insertions, 0 deletions

diff --git a/libAACenc/src/aacenc_tns.h b/libAACenc/src/aacenc_tns.h
new file mode 100644
index 0000000..519fd69
--- /dev/null
+++ b/libAACenc/src/aacenc_tns.h
@@ -0,0 +1,198 @@
+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+  All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
+the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
+This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
+audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
+independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
+of the MPEG specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
+may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
+individually for the purpose of encoding or decoding bit streams in products that are compliant with
+the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
+these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
+software may already be covered under those patent licenses when it is used for those licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
+are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
+applications information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification, are permitted without
+payment of copyright license fees provided that you satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
+your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation and/or other materials
+provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
+You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived from this library without
+prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
+software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
+and the date of any change. For modified versions of the FDK AAC Codec, the term
+"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
+"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
+ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
+respect to this software.
+
+You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
+by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
+"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
+of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
+including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
+or business interruption, however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of this software, even if
+advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------------------------------------- */
+
+/******************************** MPEG Audio Encoder **************************
+
+   Initial author:       Alex Groeschel
+   contents/description: Temporal noise shaping
+
+******************************************************************************/
+
+#ifndef _TNS_H
+#define _TNS_H
+
+#include "common_fix.h"
+
+#include "psy_const.h"
+
+
+#ifndef PI
+#define PI            3.1415926535897931f
+#endif
+
+/**
+ * TNS_ENABLE_MASK
+ * This bitfield defines which TNS features are enabled
+ *   The TNS mask is composed of 4 bits.
+ *   tnsMask |= 0x1; activate TNS short blocks
+ *   tnsMask |= 0x2; activate TNS for long blocks
+ *   tnsMask |= 0x4; activate TNS PEAK tool for short blocks
+ *   tnsMask |= 0x8; activate TNS PEAK tool for long blocks
+ */
+#define TNS_ENABLE_MASK 0xf
+
+/* TNS max filter order for Low Complexity MPEG4 profile */
+#define TNS_MAX_ORDER 12
+
+
+#define MAX_NUM_OF_FILTERS 2
+
+
+typedef struct{ /*stuff that is tabulated dependent on bitrate etc. */
+  INT     filterEnabled[MAX_NUM_OF_FILTERS];
+  INT     threshOn[MAX_NUM_OF_FILTERS];                /* min. prediction gain for using tns TABUL*/
+  INT     tnsLimitOrder[MAX_NUM_OF_FILTERS];           /* Limit for TNS order TABUL*/
+  INT     tnsFilterDirection[MAX_NUM_OF_FILTERS];      /* Filtering direction, 0=up, 1=down TABUL */
+  INT     acfSplit[MAX_NUM_OF_FILTERS];
+  INT     seperateFiltersAllowed;
+
+}TNS_CONFIG_TABULATED;
+
+
+
+typedef struct {   /*assigned at InitTime*/
+  TNS_CONFIG_TABULATED confTab;
+  INT tnsActive;
+  INT maxOrder;                /* max. order of tns filter */
+  INT coefRes;
+  FIXP_DBL acfWindow[MAX_NUM_OF_FILTERS][TNS_MAX_ORDER+3+1];
+  /* now some things that only probably can be done at Init time;
+     could be they have to be split up for each individual (short) window or
+     even filter.  */
+  INT lpcStartBand[MAX_NUM_OF_FILTERS];
+  INT lpcStartLine[MAX_NUM_OF_FILTERS];
+  INT lpcStopBand;
+  INT lpcStopLine;
+
+}TNS_CONFIG;
+
+
+typedef struct {
+  INT   tnsActive;
+  INT   predictionGain;
+} TNS_SUBBLOCK_INFO;
+
+typedef struct{   /*changed at runTime*/
+  TNS_SUBBLOCK_INFO subBlockInfo[TRANS_FAC];
+  FIXP_DBL ratioMultTable[TRANS_FAC][MAX_SFB_SHORT];
+} TNS_DATA_SHORT;
+
+typedef struct{   /*changed at runTime*/
+  TNS_SUBBLOCK_INFO subBlockInfo;
+  FIXP_DBL ratioMultTable[MAX_SFB_LONG];
+} TNS_DATA_LONG;
+
+/* can be implemented as union */
+typedef shouldBeUnion{
+  TNS_DATA_LONG Long;
+  TNS_DATA_SHORT Short;
+}TNS_DATA_RAW;
+
+typedef struct{
+  INT numOfSubblocks;
+  TNS_DATA_RAW dataRaw;
+  INT tnsMaxScaleSpec;
+  INT filtersMerged;
+}TNS_DATA;
+
+typedef struct{
+  INT numOfFilters[TRANS_FAC];
+  INT coefRes[TRANS_FAC];
+  INT length[TRANS_FAC][MAX_NUM_OF_FILTERS];
+  INT order[TRANS_FAC][MAX_NUM_OF_FILTERS];
+  INT direction[TRANS_FAC][MAX_NUM_OF_FILTERS];
+  INT coefCompress[TRANS_FAC][MAX_NUM_OF_FILTERS];
+    /* for Long: length TNS_MAX_ORDER (12 for LC) is required -> 12 */
+    /* for Short: length TRANS_FAC*TNS_MAX_ORDER (only 5 for short LC) is required -> 8*5=40 */
+    /* Currently TRANS_FAC*TNS_MAX_ORDER = 8*12 = 96 (for LC) is used (per channel)! Memory could be saved here! */
+  INT coef[TRANS_FAC][MAX_NUM_OF_FILTERS][TNS_MAX_ORDER];
+}TNS_INFO;
+
+INT FDKaacEnc_FreqToBandWithRounding(
+        const INT freq,
+        const INT fs,
+        const INT numOfBands,
+        const INT *bandStartOffset
+        );
+
+#endif /* _TNS_H */