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 WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_SOURCE_SIMPLE_INTERPOLATE_LSF_H_
20#define WEBRTC_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
28void 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    iLBC_Enc_Inst_t *iLBCenc_inst
43    /* (i/o) the encoder state structure */
44                                        );
45
46#endif
47