1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/* HR (GSM 06.20) codec wrapper */
/*
* This file is part of gapk (GSM Audio Pocket Knife).
*
* gapk is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* gapk is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with gapk. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gsmhr/gsmhr.h>
#include "refsrc/typedefs.h"
#include "refsrc/homing.h"
#include "refsrc/sp_dec.h"
#include "refsrc/sp_enc.h"
#define EXPORT __attribute__((visibility("default")))
struct gsmhr {
int dec_reset_flg;
};
EXPORT struct gsmhr *
gsmhr_init(void)
{
struct gsmhr *state;
state = calloc(1, sizeof(struct gsmhr));
if (!state)
return NULL;
state->dec_reset_flg = 1;
return state;
}
EXPORT void
gsmhr_exit(struct gsmhr *state)
{
free(state);
}
EXPORT int
gsmhr_encode(struct gsmhr *state, int16_t *hr_params, const int16_t *pcm)
{
int enc_reset_flg;
Shortword pcm_b[F_LEN];
memcpy(pcm_b, pcm, F_LEN*sizeof(int16_t));
enc_reset_flg = encoderHomingFrameTest(pcm_b);
speechEncoder(pcm_b, hr_params);
if (enc_reset_flg)
resetEnc();
return 0;
}
EXPORT int
gsmhr_decode(struct gsmhr *state, int16_t *pcm, const int16_t *hr_params)
{
#define WHOLE_FRAME 18
#define TO_FIRST_SUBFRAME 9
int dec_reset_flg;
Shortword hr_params_b[22];
memcpy(hr_params_b, hr_params, 22*sizeof(int16_t));
if (state->dec_reset_flg)
dec_reset_flg = decoderHomingFrameTest(hr_params_b, TO_FIRST_SUBFRAME);
else
dec_reset_flg = 0;
if (dec_reset_flg && state->dec_reset_flg) {
int i;
for (i=0; i<F_LEN; i++)
pcm[i] = EHF_MASK;
} else {
speechDecoder(hr_params_b, pcm);
}
if (!state->dec_reset_flg)
dec_reset_flg = decoderHomingFrameTest(hr_params_b, WHOLE_FRAME);
if (dec_reset_flg)
resetDec();
state->dec_reset_flg = dec_reset_flg;
return 0;
}
|
