aboutsummaryrefslogtreecommitdiffstats
path: root/src/fmt_ti.c
blob: d7a1ec7101908e0f0e6b79a461353c385e359336 (plain)
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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
/* TI Calypso / Locosto (?) internal buffer format */

/* The buffer are actually 16 bits words and must be read as
 * such in the HW itself.
 * It's assumed here it was dumped by putting the 8 MSB first
 * and 8 LSB in the dumped files, for 33 bytes (thus dropping the
 * last 8 LSBs)
 */

/*
 * 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 <string.h>
#include <assert.h>

#include <osmocom/codec/codec.h>

#include <osmocom/gapk/codecs.h>
#include <osmocom/gapk/formats.h>
#include <osmocom/gapk/utils.h>

#define TI_LEN	33

static int
ti_hr_from_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
{
	int i, voiced;
	const uint16_t *bit_mapping;

	assert(src_len == HR_CANON_LEN);

	memset(dst, 0x00, TI_LEN); /* Not even half the bits are written, so we pre-clear */

	voiced = (msb_get_bit(src, 34) << 1) | msb_get_bit(src, 35);

	bit_mapping = voiced ?
		&gsm620_voiced_bitorder[0] :
		&gsm620_unvoiced_bitorder[0] ;

	for (i=0; i<112; i++) {
		int si = bit_mapping[i];
		int di = i >= 95 ? i+4 : i;
		msb_put_bit(dst, di, msb_get_bit(src, si));
	}

	return TI_LEN;
}

static int
ti_hr_to_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
{
	int i, voiced;
	const uint16_t *bit_mapping;

	assert(src_len == TI_LEN);

	voiced = (msb_get_bit(src, 94) << 1) | msb_get_bit(src, 93);

	bit_mapping = voiced ?
		&gsm620_voiced_bitorder[0] :
		&gsm620_unvoiced_bitorder[0] ;

	for (i=0; i<112; i++) {
		int si = i >= 95 ? i+4 : i;
		int di = bit_mapping[i];
		msb_put_bit(dst, di, msb_get_bit(src, si));
	}

	return HR_CANON_LEN;
}

const struct osmo_gapk_format_desc fmt_ti_hr = {
	.type			= FMT_TI_HR,
	.codec_type		= CODEC_HR,
	.name			= "ti-hr",
	.description		= "Texas Instrument HR TCH/H buffer format",

	.frame_len		= TI_LEN,
	.conv_from_canon	= ti_hr_from_canon,
	.conv_to_canon		= ti_hr_to_canon,
};


static int
ti_fr_from_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
{
	int i;

	assert(src_len == FR_CANON_LEN);

	dst[22] = dst[23] = 0x00; /* some bits won't be writter, pre-clear them */

	for (i=0; i<260; i++) {
		int si = gsm610_bitorder[i];
		int di = i >= 182 ? i+4 : i;
		msb_put_bit(dst, di, msb_get_bit(src, si));
	}

	return TI_LEN;
}

static int
ti_fr_to_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
{
	int i;

	assert(src_len == TI_LEN);

	dst[32] = 0x00; /* last nibble won't written, pre-clear it */

	for (i=0; i<260; i++) {
		int si = i >= 182 ? i+4 : i;
		int di = gsm610_bitorder[i];
		msb_put_bit(dst, di, msb_get_bit(src, si));
	}

	return FR_CANON_LEN;
}

const struct osmo_gapk_format_desc fmt_ti_fr = {
	.type			= FMT_TI_FR,
	.codec_type		= CODEC_FR,
	.name			= "ti-fr",
	.description		= "Texas Instrument FR TCH/F buffer format",

	.frame_len		= TI_LEN,
	.conv_from_canon	= ti_fr_from_canon,
	.conv_to_canon		= ti_fr_to_canon,
};


static int
ti_efr_from_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
{
	int i;

	assert(src_len == EFR_CANON_LEN);

	memset(dst, 0x00, 33); /* pre-clear */

	for (i=0; i<244; i++) {
		int si, tsi = gsm660_bitorder[i];
		int di = i >= 182 ? i+4 : i;

		if (tsi < 71)
			si = tsi;
		else if (tsi < 73)
			continue; /* repeated bits */
		else if (tsi < 123)
			si = tsi - 2;
		else if (tsi < 125)
			continue; /* repeated bits */
		else if (tsi < 178)
			si = tsi - 4;
		else if (tsi < 180)
			continue; /* repeated bits */
		else if (tsi < 230)
			si = tsi - 6;
		else if (tsi < 232)
			continue; /* repeated bits */
		else if (tsi < 252)
			si = tsi - 8;
		else
			continue; /* CRC poly */

		msb_put_bit(dst, di, msb_get_bit(src, si));
	}

	return TI_LEN;
}

static int
ti_efr_to_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
{
	int i;

	assert(src_len == TI_LEN);

	dst[30] = 0x00; /* last nibble won't written, pre-clear it */

	for (i=0; i<244; i++) {
		int si = i >= 182 ? i+4 : i;
		int di, tdi = gsm660_bitorder[i];

		if (tdi < 71)
			di = tdi;
		else if (tdi < 73)
			continue; /* repeated bits */
		else if (tdi < 123)
			di = tdi - 2;
		else if (tdi < 125)
			continue; /* repeated bits */
		else if (tdi < 178)
			di = tdi - 4;
		else if (tdi < 180)
			continue; /* repeated bits */
		else if (tdi < 230)
			di = tdi - 6;
		else if (tdi < 232)
			continue; /* repeated bits */
		else if (tdi < 252)
			di = tdi - 8;
		else
			continue; /* CRC poly */

		msb_put_bit(dst, di, msb_get_bit(src, si));
	}

	return EFR_CANON_LEN;
}

const struct osmo_gapk_format_desc fmt_ti_efr = {
	.type			= FMT_TI_EFR,
	.codec_type		= CODEC_EFR,
	.name			= "ti-efr",
	.description		= "Texas Instrument EFR TCH/F buffer format",

	.frame_len		= TI_LEN,
	.conv_from_canon	= ti_efr_from_canon,
	.conv_to_canon		= ti_efr_to_canon,
};