q_plsf.cpp revision 4f1efc098cb5791c3e9f483f2af84aef70d2d0a0 
1/* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
13 * express or implied.
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
17 */
18/****************************************************************************************
19Portions of this file are derived from the following 3GPP standard:
20
21    3GPP TS 26.073
22    ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
23    Available from http://www.3gpp.org
24
25(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
26Permission to distribute, modify and use this file under the standard license
27terms listed above has been obtained from the copyright holder.
28****************************************************************************************/
29/*
30********************************************************************************
31*
32*      GSM AMR-NB speech codec   R98   Version 7.5.0   March 2, 2001
33*                                R99   Version 3.2.0
34*                                REL-4 Version 4.0.0
35*
36********************************************************************************
37*
38*      File             : q_plsf.c
39*      Purpose          : common part (init, exit, reset) of LSF quantization
40*                         module (rest in q_plsf_3.c and q_plsf_5.c)
41*
42********************************************************************************
43*/
44
45/*
46********************************************************************************
47*                         MODULE INCLUDE FILE AND VERSION ID
48********************************************************************************
49*/
50
51#include <stdlib.h>
52
53#include "q_plsf.h"
54
55/*
56********************************************************************************
57*                         INCLUDE FILES
58********************************************************************************
59*/
60#include "typedef.h"
61#include "basic_op.h"
62
63
64/*
65********************************************************************************
66*                         PUBLIC PROGRAM CODE
67********************************************************************************
68*/
69
70/*
71**************************************************************************
72*
73*  Function    : Q_plsf_init
74*  Purpose     : Allocates memory and initializes state variables
75*
76**************************************************************************
77*/
78Word16 Q_plsf_init(Q_plsfState **state)
79{
80    Q_plsfState* s;
81
82    if (state == (Q_plsfState **) NULL)
83    {
84        /* fprintf(stderr, "Q_plsf_init: invalid parameter\n"); */
85        return -1;
86    }
87    *state = NULL;
88
89    /* allocate memory */
90    if ((s = (Q_plsfState *) malloc(sizeof(Q_plsfState))) == NULL)
91    {
92        /* fprintf(stderr, "Q_plsf_init: can not malloc state structure\n"); */
93        return -1;
94    }
95
96    Q_plsf_reset(s);
97    *state = s;
98
99    return 0;
100}
101
102/*
103**************************************************************************
104*
105*  Function    : Q_plsf_reset
106*  Purpose     : Resets state memory
107*
108**************************************************************************
109*/
110Word16 Q_plsf_reset(Q_plsfState *state)
111{
112    Word16 i;
113
114    if (state == (Q_plsfState *) NULL)
115    {
116        /* fprintf(stderr, "Q_plsf_reset: invalid parameter\n"); */
117        return -1;
118    }
119
120    for (i = 0; i < M; i++)
121        state->past_rq[i] = 0;
122
123    return 0;
124}
125
126/*
127**************************************************************************
128*
129*  Function    : Q_plsf_exit
130*  Purpose     : The memory used for state memory is freed
131*
132**************************************************************************
133*/
134void Q_plsf_exit(Q_plsfState **state)
135{
136    if (state == NULL || *state == NULL)
137        return;
138
139    /* deallocate memory */
140    free(*state);
141    *state = NULL;
142
143    return;
144}
145