comparison libtwamr/c2_11pf.h @ 319:9bca350be398

libtwamr: integrate c2_11pf.c
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 18 Apr 2024 19:23:20 +0000
parents
children
comparison
equal deleted inserted replaced
318:6fd6c5fc1aa4 319:9bca350be398
1 /*
2 ********************************************************************************
3 *
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
5 * R99 Version 3.3.0
6 * REL-4 Version 4.1.0
7 *
8 ********************************************************************************
9 *
10 * File : c2_11pf.h
11 * Purpose : Searches a 11 bit algebraic codebook containing 2 pulses
12 * in a frame of 40 samples.
13 *
14 ********************************************************************************
15 */
16 #ifndef c2_11pf_h
17 #define c2_11pf_h "$Id $"
18
19 /*
20 ********************************************************************************
21 * INCLUDE FILES
22 ********************************************************************************
23 */
24 #include "typedef.h"
25
26 /*
27 ********************************************************************************
28 * LOCAL VARIABLES AND TABLES
29 ********************************************************************************
30 */
31
32 /*
33 ********************************************************************************
34 * DEFINITION OF DATA TYPES
35 ********************************************************************************
36 */
37
38 /*
39 ********************************************************************************
40 * DECLARATION OF PROTOTYPES
41 ********************************************************************************
42 */
43 /*************************************************************************
44 *
45 * FUNCTION: code_2i40_11bits()
46 *
47 * PURPOSE: Searches a 11 bit algebraic codebook containing 2 pulses
48 * in a frame of 40 samples.
49 *
50 * DESCRIPTION:
51 * The code length is 40, containing 2 nonzero pulses: i0...i1.
52 * All pulses can have two possible amplitudes: +1 or -1.
53 * Pulse i0 can have 2x8=16 possible positions, pulse i1 can have
54 * 4x8=32 positions.
55 *
56 * i0 : 1, 6, 11, 16, 21, 26, 31, 36.
57 * 3, 8, 13, 18, 23, 28, 33, 38.
58 * i1 : 0, 5, 10, 15, 20, 25, 30, 35.
59 * 1, 6, 11, 16, 21, 26, 31, 36.
60 * 2, 7, 12, 17, 22, 27, 32, 37.
61 * 4, 9, 14, 19, 24, 29, 34, 39.
62 *
63 *************************************************************************/
64
65 Word16 code_2i40_11bits(
66 Word16 x[], /* i : target vector */
67 Word16 h[], /* i : impulse response of weighted synthesis filter */
68 /* h[-L_subfr..-1] must be set to zero. */
69 Word16 T0, /* i : Pitch lag */
70 Word16 pitch_sharp, /* i : Last quantized pitch gain */
71 Word16 code[], /* o : Innovative codebook */
72 Word16 y[], /* o : filtered fixed codebook excitation */
73 Word16 * sign /* o : Signs of 2 pulses */
74 );
75
76 #endif