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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
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