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format/fmt_ti: Add support for EFR variant 

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2011-02-25 18:12:25 +01:00
parent b1525d67fe
commit e2c5719d74
3 changed files with 91 additions and 0 deletions
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1
include/gapk/formats.h
View File

@ -46,6 +46,7 @@ enum format_type {
/* Texas Instrument calypso/locosto buffer format */
FMT_TI_HR,
FMT_TI_FR,
FMT_TI_EFR,
_FMT_MAX,
};

88
src/fmt_ti.c
View File

@ -132,3 +132,91 @@ const struct format_desc fmt_ti_fr = {
.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)
{
int i;
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 0;
}
static int
ti_efr_to_canon(uint8_t *dst, const uint8_t *src)
{
int i;
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 0;
}
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 = 33,
.conv_from_canon = ti_efr_from_canon,
.conv_to_canon = ti_efr_to_canon,
};

2
src/formats.c
View File

@ -33,6 +33,7 @@ extern const struct format_desc fmt_racal_efr;
extern const struct format_desc fmt_rawpcm_s16le;
extern const struct format_desc fmt_ti_hr;
extern const struct format_desc fmt_ti_fr;
extern const struct format_desc fmt_ti_efr;
static const struct format_desc *supported_formats[_FMT_MAX] = {
[FMT_INVALID] = NULL,
@ -46,6 +47,7 @@ static const struct format_desc *supported_formats[_FMT_MAX] = {
[FMT_RAWPCM_S16LE] = &fmt_rawpcm_s16le,
[FMT_TI_HR] = &fmt_ti_hr,
[FMT_TI_FR] = &fmt_ti_fr,
[FMT_TI_EFR] = &fmt_ti_efr,
};