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_SimpleLsfQ.c
16
17******************************************************************/
18
19#include "defines.h"
20#include "split_vq.h"
21#include "constants.h"
22
23/*----------------------------------------------------------------*
24 *  lsf quantizer (subrutine to LPCencode)
25 *---------------------------------------------------------------*/
26
27void WebRtcIlbcfix_SimpleLsfQ(
28    int16_t *lsfdeq, /* (o) dequantized lsf coefficients
29                                   (dimension FILTERORDER) Q13 */
30    int16_t *index, /* (o) quantization index */
31    int16_t *lsf, /* (i) the lsf coefficient vector to be
32                           quantized (dimension FILTERORDER) Q13 */
33    int16_t lpc_n /* (i) number of lsf sets to quantize */
34                              ){
35
36  /* Quantize first LSF with memoryless split VQ */
37  WebRtcIlbcfix_SplitVq( lsfdeq, index, lsf,
38                         (int16_t*)WebRtcIlbcfix_kLsfCb, (int16_t*)WebRtcIlbcfix_kLsfDimCb, (int16_t*)WebRtcIlbcfix_kLsfSizeCb);
39
40  if (lpc_n==2) {
41    /* Quantize second LSF with memoryless split VQ */
42    WebRtcIlbcfix_SplitVq( lsfdeq + LPC_FILTERORDER, index + LSF_NSPLIT,
43                           lsf + LPC_FILTERORDER, (int16_t*)WebRtcIlbcfix_kLsfCb,
44                           (int16_t*)WebRtcIlbcfix_kLsfDimCb, (int16_t*)WebRtcIlbcfix_kLsfSizeCb);
45  }
46  return;
47}
48