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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.
* -------------------------------------------------------------------
*/
/****************************************************************************************
Portions of this file are derived from the following 3GPP standard:
3GPP TS 26.073
ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
Available from http://www.3gpp.org
(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
Permission to distribute, modify and use this file under the standard license
terms listed above has been obtained from the copyright holder.
****************************************************************************************/
/*
------------------------------------------------------------------------------
Pathname: ./audio/gsm-amr/c/src/d_plsf.c
Functions:
Date: 04/14/2000
------------------------------------------------------------------------------
REVISION HISTORY
Description: Removed the functions d_plsf_init and d_plsf_exit.
The d_plsf related structure is no longer dynamically allocated.
Description: Removed q_plsf_5.tab from Include section and added
q_plsf_5_tbl.h to Include section. Changed "mean_lsf"
to "mean_lsf_5" in D_plsf_reset().
Description: Replaced OSCL mem type functions and eliminated include
files that now are chosen by OSCL definitions
Description: Replaced "int" and/or "char" with OSCL defined types.
Description:
------------------------------------------------------------------------------
MODULE DESCRIPTION
common part (reset) of LSF decoder
module (rest in d_plsf_3.c and d_plsf_5.c)
------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "typedef.h"
#include "basic_op.h"
#include "cnst.h"
#include "copy.h"
#include "d_plsf.h"
#include "q_plsf_5_tbl.h"
/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here. Include conditional
; compile variables also.
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL VARIABLE DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL FUNCTION REFERENCES
; Declare functions defined elsewhere and referenced in this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL VARIABLES REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
/*
------------------------------------------------------------------------------
FUNCTION NAME: D_plsf_reset
------------------------------------------------------------------------------
INPUT AND OUTPUT DEFINITIONS
Inputs:
state = pointer to structure of type D_plsf_reset
Outputs:
fields of the structure pointed to by state is initialized to zero
Returns:
return_value = 0, if reset was successful; -1, otherwise (int)
Global Variables Used:
None
Local Variables Needed:
None
------------------------------------------------------------------------------
FUNCTION DESCRIPTION
Resets state memory
------------------------------------------------------------------------------
REQUIREMENTS
None
------------------------------------------------------------------------------
REFERENCES
d_plsf.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001
------------------------------------------------------------------------------
PSEUDO-CODE
int D_plsf_reset (D_plsfState *state)
{
Word16 i;
if (state == (D_plsfState *) NULL){
// fprintf(stderr, "D_plsf_reset: invalid parameter\n");
return -1;
}
for (i = 0; i < M; i++){
state->past_r_q[i] = 0; // Past quantized prediction error
}
// Past dequantized lsfs
Copy(mean_lsf, &state->past_lsf_q[0], M);
return 0;
}
------------------------------------------------------------------------------
RESOURCES USED [optional]
When the code is written for a specific target processor the
the resources used should be documented below.
HEAP MEMORY USED: x bytes
STACK MEMORY USED: x bytes
CLOCK CYCLES: (cycle count equation for this function) + (variable
used to represent cycle count for each subroutine
called)
where: (cycle count variable) = cycle count for [subroutine
name]
------------------------------------------------------------------------------
CAUTION [optional]
[State any special notes, constraints or cautions for users of this function]
------------------------------------------------------------------------------
*/
Word16 D_plsf_reset(D_plsfState *state)
{
Word16 i;
if (state == (D_plsfState *) NULL)
{
/* fprintf(stderr, "D_plsf_reset: invalid parameter\n"); */
return -1;
}
for (i = 0; i < M; i++)
{
state->past_r_q[i] = 0; /* Past quantized prediction error */
}
/* Past dequantized lsfs */
Copy(mean_lsf_5, &state->past_lsf_q[0], M);
return 0;
}
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