1 /*
2  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 /******************************************************************
12 
13  iLBC Speech Coder ANSI-C Source Code
14 
15  WebRtcIlbcfix_SimpleInterpolateLsf.h
16 
17 ******************************************************************/
18 
19 #ifndef MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_SIMPLE_INTERPOLATE_LSF_H_
20 #define MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_SIMPLE_INTERPOLATE_LSF_H_
21 
22 #include "defines.h"
23 
24 /*----------------------------------------------------------------*
25  *  lsf interpolator (subrutine to LPCencode)
26  *---------------------------------------------------------------*/
27 
28 void WebRtcIlbcfix_SimpleInterpolateLsf(
29     int16_t *syntdenum, /* (o) the synthesis filter denominator
30                                    resulting from the quantized
31                                    interpolated lsf Q12 */
32     int16_t *weightdenum, /* (o) the weighting filter denominator
33                                    resulting from the unquantized
34                                    interpolated lsf Q12 */
35     int16_t *lsf,  /* (i) the unquantized lsf coefficients Q13 */
36     int16_t *lsfdeq,  /* (i) the dequantized lsf coefficients Q13 */
37     int16_t *lsfold,  /* (i) the unquantized lsf coefficients of
38                                            the previous signal frame Q13 */
39     int16_t *lsfdeqold, /* (i) the dequantized lsf coefficients of the
40                                    previous signal frame Q13 */
41     int16_t length,  /* (i) should equate FILTERORDER */
42     IlbcEncoder *iLBCenc_inst
43     /* (i/o) the encoder state structure */
44                                         );
45 
46 #endif
47