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+
+/* -----------------------------------------------------------------------------------------------------------
+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
+----------------------------------------------------------------------------------------------------------- */
+
+/*!
+  \file
+  \brief  Framing generator prototypes and structs  
+*/
+#ifndef _FRAM_GEN_H
+#define _FRAM_GEN_H
+
+#include "sbr_def.h" /* for MAX_ENVELOPES and MAX_NOISE_ENVELOPES in struct FRAME_INFO and CODEC_TYPE */
+
+#define MAX_ENVELOPES_VARVAR MAX_ENVELOPES /*!< worst case number of envelopes in a VARVAR frame */
+#define MAX_ENVELOPES_FIXVAR_VARFIX 4 /*!< worst case number of envelopes in VARFIX and FIXVAR frames */
+#define MAX_NUM_REL 3 /*!< maximum number of relative borders in any VAR frame */
+
+/* SBR frame class definitions */
+typedef enum {
+  FIXFIX = 0, /*!< bs_frame_class: leading and trailing frame borders are fixed */
+  FIXVAR,     /*!< bs_frame_class: leading frame border is fixed, trailing frame border is variable */
+  VARFIX,     /*!< bs_frame_class: leading frame border is variable, trailing frame border is fixed */
+  VARVAR      /*!< bs_frame_class: leading and trailing frame borders are variable */
+  ,FIXFIXonly  /*!< bs_frame_class: leading border fixed (0), trailing border fixed (nrTimeSlots) and encased borders are dynamically derived from the tranPos */
+}FRAME_CLASS;
+
+
+/* helper constants */
+#define DC      4711        /*!< helper constant: don't care */
+#define EMPTY   (-99)       /*!< helper constant: empty */
+
+
+/* system constants: AAC+SBR, DRM Frame-Length */
+#define FRAME_MIDDLE_SLOT_1920  4
+#define NUMBER_TIME_SLOTS_1920  15
+
+#define LD_PRETRAN_OFF           3
+#define FRAME_MIDDLE_SLOT_512LD  0
+#define NUMBER_TIME_SLOTS_512LD  8
+#define TRANSIENT_OFFSET_LD      0
+
+
+
+/*
+system constants: AAC+SBR or aacPRO (hybrid format), Standard Frame-Length, Multi-Rate
+---------------------------------------------------------------------------
+Number of slots (numberTimeSlots): 16  (NUMBER_TIME_SLOTS_2048)
+Detector-offset (frameMiddleSlot):  4
+Overlap                          :  3
+Buffer-offset                    :  8  (BUFFER_FRAME_START_2048 = 0)
+
+
+                        |<------------tranPos---------->|
+                |c|d|e|f|0|1|2|3|4|5|6|7|8|9|a|b|c|d|e|f|
+        FixFix  |                               |
+        FixVar  |                               :<- ->:
+        VarFix  :<- ->:                         |
+        VarVar  :<- ->:                         :<- ->:
+                0 1 2 3 4 5 6 7 8 9 a b c d e f 0 1 2 3
+................................................................................
+
+|-|-|-|-|-|-|-|-B-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-B-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|-|
+
+frame-generator:0                               16              24              32
+analysis-buffer:8                               24              32              40
+*/
+#define FRAME_MIDDLE_SLOT_2048  4
+#define NUMBER_TIME_SLOTS_2048  16
+
+
+/*
+system constants: mp3PRO, Multi-Rate & Single-Rate
+--------------------------------------------------
+Number of slots (numberTimeSlots):  9    (NUMBER_TIME_SLOTS_1152)
+Detector-offset (frameMiddleSlot):  4    (FRAME_MIDDLE_SLOT_1152)
+Overlap                          :  3
+Buffer-offset                    :  4.5  (BUFFER_FRAME_START_1152 = 0)
+
+
+                         |<----tranPos---->|
+                 |5|6|7|8|0|1|2|3|4|5|6|7|8|
+         FixFix  |                 |
+         FixVar  |                 :<- ->:
+         VarFix  :<- ->:           |
+         VarVar  :<- ->:           :<- ->:
+                 0 1 2 3 4 5 6 7 8 0 1 2 3
+        .............................................
+
+        -|-|-|-|-B-|-|-|-|-|-|-|-|-B-|-|-|-|-|-|-|-|-|
+
+frame-generator: 0                 9       13        18
+analysis-buffer: 4.5               13.5              22.5
+*/
+#define FRAME_MIDDLE_SLOT_1152  4
+#define NUMBER_TIME_SLOTS_1152  9
+
+
+/* system constants: Layer2+SBR */
+#define FRAME_MIDDLE_SLOT_2304  8
+#define NUMBER_TIME_SLOTS_2304  18
+
+
+/*!
+  \struct SBR_GRID
+  \brief  sbr_grid() signals to be converted to bitstream elements
+
+  The variables hold the signals (e.g. lengths and numbers) in "clear text"
+*/
+
+typedef struct
+{
+  /* system constants */
+  INT bufferFrameStart;     /*!< frame generator vs analysis buffer time alignment (currently set to 0, offset added elsewhere) */
+  INT numberTimeSlots;      /*!< number of SBR timeslots per frame */
+
+  /* will be adjusted for every frame */
+  FRAME_CLASS frameClass;   /*!< SBR frame class  */
+  INT bs_num_env;           /*!< bs_num_env, number of envelopes for FIXFIX */
+  INT bs_abs_bord;          /*!< bs_abs_bord, absolute border for VARFIX and FIXVAR */
+  INT n;                    /*!< number of relative borders for VARFIX and FIXVAR   */
+  INT p;                    /*!< pointer-to-transient-border  */
+  INT bs_rel_bord[MAX_NUM_REL];         /*!< bs_rel_bord, relative borders for all VAR */
+  INT v_f[MAX_ENVELOPES_FIXVAR_VARFIX]; /*!< envelope frequency resolutions for FIXVAR and VARFIX  */
+
+  INT bs_abs_bord_0;        /*!< bs_abs_bord_0, leading absolute border for VARVAR */
+  INT bs_abs_bord_1;        /*!< bs_abs_bord_1, trailing absolute border for VARVAR */
+  INT bs_num_rel_0;         /*!< bs_num_rel_0, number of relative borders associated with leading absolute border for VARVAR */
+  INT bs_num_rel_1;         /*!< bs_num_rel_1, number of relative borders associated with trailing absolute border for VARVAR */
+  INT bs_rel_bord_0[MAX_NUM_REL];       /*!< bs_rel_bord_0, relative borders associated with leading absolute border for VARVAR */
+  INT bs_rel_bord_1[MAX_NUM_REL];       /*!< bs_rel_bord_1, relative borders associated with trailing absolute border for VARVAR */
+  INT v_fLR[MAX_ENVELOPES_VARVAR];      /*!< envelope frequency resolutions for VARVAR  */
+
+}
+SBR_GRID;
+typedef SBR_GRID *HANDLE_SBR_GRID;
+
+
+
+/*!
+  \struct SBR_FRAME_INFO
+  \brief  time/frequency grid description for one frame
+*/
+typedef struct
+{
+  INT nEnvelopes;                         /*!< number of envelopes */
+  INT borders[MAX_ENVELOPES+1];           /*!< envelope borders in SBR timeslots */
+  FREQ_RES freqRes[MAX_ENVELOPES];        /*!< frequency resolution of each envelope */
+  INT shortEnv;                           /*!< number of an envelope to be shortened (starting at 1) or 0 for no shortened envelope */
+  INT nNoiseEnvelopes;                    /*!< number of noise floors */
+  INT bordersNoise[MAX_NOISE_ENVELOPES+1];/*!< noise floor borders in SBR timeslots */
+}
+SBR_FRAME_INFO;
+/* WARNING: When rearranging the elements of this struct keep in mind that the static
+ * initializations in the corresponding C-file have to be rearranged as well!
+ * snd 2002/01/23
+ */
+typedef SBR_FRAME_INFO *HANDLE_SBR_FRAME_INFO;
+
+
+/*!
+  \struct SBR_ENVELOPE_FRAME
+  \brief  frame generator main struct
+
+  Contains tuning parameters, time/frequency grid description, sbr_grid() bitstream elements, and generator internal signals
+*/
+typedef struct
+{
+  /* system constants */
+  INT frameMiddleSlot;      /*!< transient detector offset in SBR timeslots */
+
+  /* basic tuning parameters */
+  INT staticFraming;        /*!< 1: run static framing in time, i.e. exclusive use of bs_frame_class = FIXFIX */
+  INT numEnvStatic;         /*!< number of envelopes per frame for static framing */
+  INT freq_res_fixfix;      /*!< envelope frequency resolution to use for bs_frame_class = FIXFIX */
+
+  /* expert tuning parameters */
+  const int *v_tuningSegm;  /*!< segment lengths to use around transient */
+  const int *v_tuningFreq;  /*!< frequency resolutions to use around transient */
+  INT dmin;                 /*!< minimum length of dependent segments */
+  INT dmax;                 /*!< maximum length of dependent segments */
+  INT allowSpread;          /*!< 1: allow isolated transient to influence grid of 3 consecutive frames */
+
+  /* internally used signals */
+  FRAME_CLASS frameClassOld;                /*!< frame class used for previous frame */
+  INT spreadFlag;                           /*!< 1: use VARVAR instead of VARFIX to follow up old transient */
+
+  INT v_bord[2 * MAX_ENVELOPES_VARVAR + 1]; /*!< borders for current frame and preliminary borders for next frame (fixed borders excluded) */
+  INT length_v_bord;                        /*!< helper variable: length of v_bord */
+  INT v_freq[2 * MAX_ENVELOPES_VARVAR + 1]; /*!< frequency resolutions for current frame and preliminary resolutions for next frame */
+  INT length_v_freq;                        /*!< helper variable: length of v_freq */
+
+  INT v_bordFollow[MAX_ENVELOPES_VARVAR];   /*!< preliminary borders for current frame (calculated during previous frame) */
+  INT length_v_bordFollow;                  /*!< helper variable: length of v_bordFollow */
+  INT i_tranFollow;                         /*!< points to transient border in v_bordFollow (may be negative, see keepForFollowUp()) */
+  INT i_fillFollow;                         /*!< points to first fill border in v_bordFollow */
+  INT v_freqFollow[MAX_ENVELOPES_VARVAR];   /*!< preliminary frequency resolutions for current frame (calculated during previous frame) */
+  INT length_v_freqFollow;                  /*!< helper variable: length of v_freqFollow */
+
+
+  /* externally needed signals */
+  SBR_GRID         SbrGrid;         /*!< sbr_grid() signals to be converted to bitstream elements */
+  SBR_FRAME_INFO   SbrFrameInfo;    /*!< time/frequency grid description for one frame */
+}
+SBR_ENVELOPE_FRAME;
+typedef SBR_ENVELOPE_FRAME *HANDLE_SBR_ENVELOPE_FRAME;
+
+
+
+void
+FDKsbrEnc_initFrameInfoGenerator (HANDLE_SBR_ENVELOPE_FRAME  hSbrEnvFrame,
+                          INT allowSpread,
+                          INT numEnvStatic,
+                          INT staticFraming,
+                          INT timeSlots,
+                          INT freq_res_fixfix
+                          ,int ldGrid
+                          );
+
+HANDLE_SBR_FRAME_INFO
+FDKsbrEnc_frameInfoGenerator (HANDLE_SBR_ENVELOPE_FRAME hSbrEnvFrame,
+                    UCHAR *v_transient_info,
+                    UCHAR *v_transient_info_pre,
+                    int ldGrid,
+                    const int *v_tuning);
+
+#endif