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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 Framing generator prototypes and structs $Revision: 36847 $
*/
#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
);
/* void deleteFrameInfoGenerator (HANDLE_SBR_ENVELOPE_FRAME hSbrEnvFrame); */
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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