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/* ------------------------------------------------------------------
* Copyright (C) 1998-2009 PacketVideo
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied.
* See the License for the specific language governing permissions
* and limitations under the License.
* -------------------------------------------------------------------
*/
/*
Pathname: LT_PRED_STATUS.h
------------------------------------------------------------------------------
REVISION HISTORY
Description:
(1) Merged in #defines from ltp_common.h, thereby eliminating that file.
Description:
(1) Modified to include the lines...
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
}
#endif
(2) Updated the copyright header.
Description: Moved large ltp_buffer up to s_tDec_Int_Chan.h, since this
move allowed for other elements in this structure to be shared with
the fxpCoef array.
Description: Decreased size of LTP buffers from 4096 to 3072. The upper 1024
elements in the LTP buffers were never touched in the code. This saves
4 kilobytes in memory.
Description: Decreased size of LTP buffers again from 3072 to 2048. This
time, I realized that 1024 elements were duplicated in the 32-bit array
pVars->pChVars[]->time_quant. Rather than copy this data EVERY frame
from a 32-bit to a 16-bit LTP buffer, the data is accessed only
when it is needed. This saves both MIPS and memory.
Who: Date:
Description:
------------------------------------------------------------------------------
INCLUDE DESCRIPTION
define LT_PRED_STATUS structure for pulse data decoding.
------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
; CONTINUE ONLY IF NOT ALREADY DEFINED
----------------------------------------------------------------------------*/
#ifndef S_LT_PRED_STATUS_H
#define S_LT_PRED_STATUS_H
#ifdef __cplusplus
extern "C"
{
#endif
/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "pv_audio_type_defs.h"
#include "e_blockswitching.h"
/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here.
----------------------------------------------------------------------------*/
/*
Macro: MAX_SHORT_WINDOWS
Purpose: Number of short windows in one long window.
Explanation: - */
#ifndef MAX_SHORT_WINDOWS
#define MAX_SHORT_WINDOWS NSHORT
#endif
/*
Macro: MAX_SCFAC_BANDS
Purpose: Maximum number of scalefactor bands in one frame.
Explanation: - */
#ifndef MAX_SCFAC_BANDS
#define MAX_SCFAC_BANDS MAXBANDS
#endif
/*
Macro: BLOCK_LEN_LONG
Purpose: Length of one long window
Explanation: - */
#ifndef BLOCK_LEN_LONG
#define BLOCK_LEN_LONG LN2
#endif
/*
Macro: LTP_MAX_BLOCK_LEN_LONG
Purpose: Informs the routine of the maximum block size used.
Explanation: This is needed since the TwinVQ long window
is different from the AAC long window. */
#define LTP_MAX_BLOCK_LEN_LONG BLOCK_LEN_LONG //(2 * BLOCK_LEN_LONG)
/*
Macro: LT_BLEN
Purpose: Length of the history buffer.
Explanation: Has to hold 2 long windows of time domain data. */
#ifndef LT_BLEN
#define LT_BLEN (2 * LTP_MAX_BLOCK_LEN_LONG)
#endif
/*----------------------------------------------------------------------------
; EXTERNAL VARIABLES REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; SIMPLE TYPEDEF'S
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; ENUMERATED TYPEDEF'S
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; STRUCTURES TYPEDEF'S
----------------------------------------------------------------------------*/
/*
Type: LT_PRED_STATUS
Purpose: Type of the struct holding the LTP encoding parameters.
Explanation: - */
typedef struct
{
Int weight_index;
Int win_prediction_used[MAX_SHORT_WINDOWS];
Int sfb_prediction_used[MAX_SCFAC_BANDS];
Bool ltp_data_present;
Int delay[MAX_SHORT_WINDOWS];
}
LT_PRED_STATUS;
/*----------------------------------------------------------------------------
; GLOBAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
#ifdef __cplusplus
}
#endif
#endif /* S_LT_PRED_STATUS_H */
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