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_SplitVq.c
16
17 ******************************************************************/
18
19 #include "defines.h"
20 #include "constants.h"
21 #include "vq3.h"
22 #include "vq4.h"
23
24 /*----------------------------------------------------------------*
25 * split vector quantization
26 *---------------------------------------------------------------*/
27
WebRtcIlbcfix_SplitVq(int16_t * qX,int16_t * index,int16_t * X,int16_t * CB,int16_t * dim,int16_t * cbsize)28 void WebRtcIlbcfix_SplitVq(
29 int16_t *qX, /* (o) the quantized vector in Q13 */
30 int16_t *index, /* (o) a vector of indexes for all vector
31 codebooks in the split */
32 int16_t *X, /* (i) the vector to quantize */
33 int16_t *CB, /* (i) the quantizer codebook in Q13 */
34 int16_t *dim, /* (i) the dimension of X and qX */
35 int16_t *cbsize /* (i) the number of vectors in the codebook */
36 ) {
37
38 int16_t *qXPtr, *indexPtr, *CBPtr, *XPtr;
39
40 /* Quantize X with the 3 vectror quantization tables */
41
42 qXPtr=qX;
43 indexPtr=index;
44 CBPtr=CB;
45 XPtr=X;
46 WebRtcIlbcfix_Vq3(qXPtr, indexPtr, CBPtr, XPtr, cbsize[0]);
47
48 qXPtr+=3;
49 indexPtr+=1;
50 CBPtr+=(dim[0]*cbsize[0]);
51 XPtr+=3;
52 WebRtcIlbcfix_Vq3(qXPtr, indexPtr, CBPtr, XPtr, cbsize[1]);
53
54 qXPtr+=3;
55 indexPtr+=1;
56 CBPtr+=(dim[1]*cbsize[1]);
57 XPtr+=3;
58 WebRtcIlbcfix_Vq4(qXPtr, indexPtr, CBPtr, XPtr, cbsize[2]);
59
60 return;
61 }
62