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/* 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 <gapk/codecs.h>
#include <gapk/formats.h>
#include <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 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 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 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,
};
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