1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
18 /****************************************************************************************
19 Portions of this file are derived from the following 3GPP standard:
22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
23 Available from http://www.3gpp.org
25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
26 Permission to distribute, modify and use this file under the standard license
27 terms listed above has been obtained from the copyright holder.
28 ****************************************************************************************/
30 ********************************************************************************
32 * GSM AMR-NB speech codec R98 Version 7.5.0 March 2, 2001
36 ********************************************************************************
39 * Purpose : Decodes the pitch gain using the received index.
41 ********************************************************************************
44 #define d_gain_p_h "$Id $"
47 ********************************************************************************
49 ********************************************************************************
60 **************************************************************************
62 * Function : d_gain_pitch
63 * Purpose : Decodes the pitch gain using the received index.
64 * Description : In case of no frame erasure, the gain is obtained
65 * from the quantization table at the given index;
66 * otherwise, a downscaled past gain is used.
67 * Returns : Quantized pitch gain
69 **************************************************************************
71 Word16 d_gain_pitch( /* return value: gain (Q14) */
72 enum Mode mode, /* i : AMR mode */
73 Word16 index, /* i : index of quantization */
74 const Word16* qua_gain_pitch_ptr /* i : pointer to read-only tables */