xref: /aosp_15_r20/external/webrtc/modules/audio_coding/codecs/ilbc/poly_to_lsf.c (revision d9f758449e529ab9291ac668be2861e7a55c2422) 
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_Poly2Lsf.c
16 
17 ******************************************************************/
18 
19 #include "modules/audio_coding/codecs/ilbc/poly_to_lsf.h"
20 
21 #include "modules/audio_coding/codecs/ilbc/constants.h"
22 #include "modules/audio_coding/codecs/ilbc/lsp_to_lsf.h"
23 #include "modules/audio_coding/codecs/ilbc/poly_to_lsp.h"
24 
WebRtcIlbcfix_Poly2Lsf(int16_t * lsf,int16_t * a)25 void WebRtcIlbcfix_Poly2Lsf(
26     int16_t *lsf,   /* (o) lsf coefficients (Q13) */
27     int16_t *a    /* (i) A coefficients (Q12) */
28                             ) {
29   int16_t lsp[10];
30   WebRtcIlbcfix_Poly2Lsp(a, lsp, (int16_t*)WebRtcIlbcfix_kLspMean);
31   WebRtcIlbcfix_Lsp2Lsf(lsp, lsf, 10);
32 }
33