FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/int_lsf.h @ 444:fe4983b05230

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
amrtest: implement twamr-decode
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 09 May 2024 23:35:25 +0000
parents 693ea1d5cf1e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
382
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : int_lsf.h
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : Interpolates the LSFs
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 #ifndef int_lsf_h
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 #define int_lsf_h "$Id $"
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 /*
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 * INCLUDE FILES
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 #include "typedef.h"
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 /*
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 * DEFINITION OF DATA TYPES
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 /*
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 * DECLARATION OF PROTOTYPES
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 ********************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 /*
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 **************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 *
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 * Function : Int_lsf
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 * Purpose : Interpolates the LSFs for selected subframe
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 * Description : The 20 ms speech frame is divided into 4 subframes.
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 * The LSFs are interpolated at the 1st, 2nd and 3rd
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 * subframe and only forwarded at the 4th subframe.
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 *
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 * |------|------|------|------|
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 * sf1 sf2 sf3 sf4
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 * F0 F1
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 *
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 * sf1: 3/4 F0 + 1/4 F1 sf3: 1/4 F0 + 3/4 F1
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 * sf2: 1/2 F0 + 1/2 F1 sf4: F1
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 * Returns : void
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 *
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 **************************************************************************
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 void Int_lsf (
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 Word16 lsf_old[], /* i : LSF vector at the 4th SF of past frame */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 Word16 lsf_new[], /* i : LSF vector at the 4th SF of present frame */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 Word16 i_subfr, /* i : Pointer to current sf (equal to 0,40,80 or 120) */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 Word16 lsf_out[] /* o : interpolated LSF parameters for current sf */
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 );
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62
693ea1d5cf1e libtwamr: integrate int_lsf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 #endif