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comparison libgsmhr1/enc_out_order.c @ 505:17c0aabae474

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libgsmhr1: integrate fillBitAlloc()
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 19 Jun 2024 01:49:03 +0000
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504:024615de06fe 505:17c0aabae474
1 /*
2 * This module was derived from host.c in the original GSM 06.06 source,
3 * reduced to just fillBitAlloc() function.
4 */
5
6 /*_________________________________________________________________________
7 | |
8 | Include Files |
9 |_________________________________________________________________________|
10 */
11
12 #include "typedefs.h"
13 #include "namespace.h"
14 #include "enc_out_order.h"
15
16 /***************************************************************************
17 *
18 * FUNCTION NAME: fillBitAlloc
19 *
20 * PURPOSE:
21 *
22 * Arrange speech parameters for encoder output
23 *
24 * INPUTS:
25 *
26 * The speechcoders codewords:
27 * iR0 - Frame energy
28 * piVqIndeces[0:2] - LPC vector quantizer codewords
29 * iSoftInterp - Soft interpolation bit 1 or 0
30 * iVoicing - voicing mode 0,1,2,3
31 * piLags[0:3] - Frame and delta lag codewords
32 * piCodeWrdsA[0:3] - VSELP codevector 1
33 * piCodeWrdsB[0:3] - VSELP codevector 2 (n/a for voiced modes)
34 * piGsp0s[0:3] - GSP0 codewords
35 * swVadFlag - voice activity detection flag
36 * swSP - Speech flag
37 *
38 * OUTPUTS:
39 *
40 * pswBAlloc[0:20] - an array into which the coded data is moved
41 *
42 * RETURN VALUE:
43 *
44 * none
45 *
46 * REFERENCES: Sub-clause 2.1 and 4.1.12 of GSM Recomendation 06.20
47 *
48 **************************************************************************/
49
50 void fillBitAlloc(int iVoicing, int iR0, int *piVqIndeces,
51 int iSoftInterp, int *piLags,
52 int *piCodeWrdsA, int *piCodeWrdsB,
53 int *piGsp0s, Shortword swVadFlag,
54 Shortword swSP, Shortword *pswBAlloc)
55 {
56
57 /*_________________________________________________________________________
58 | |
59 | Automatic Variables |
60 |_________________________________________________________________________|
61 */
62
63 int i;
64 Shortword *pswNxt;
65
66 /*_________________________________________________________________________
67 | |
68 | Executable Code |
69 |_________________________________________________________________________|
70 */
71
72 pswNxt = pswBAlloc;
73 *pswNxt++ = iR0;
74 for (i = 0; i < 3; i++)
75 *pswNxt++ = *piVqIndeces++;
76 *pswNxt++ = iSoftInterp;
77 *pswNxt++ = iVoicing;
78
79 /* check voicing mode */
80 if (iVoicing)
81 {
82 /* voiced mode */
83 for (i = 0; i < N_SUB; i++)
84 {
85 *pswNxt++ = *piLags++;
86 *pswNxt++ = *piCodeWrdsA++;
87 *pswNxt++ = *piGsp0s++;
88 }
89 }
90 else
91 { /* unvoiced frame */
92 for (i = 0; i < N_SUB; i++)
93 {
94 *pswNxt++ = *piCodeWrdsA++;
95 *pswNxt++ = *piCodeWrdsB++;
96 *pswNxt++ = *piGsp0s++;
97 }
98 }
99 *pswNxt++ = swVadFlag;
100 *pswNxt++ = swSP;
101 }