format: Add support for the TI calypso/locosto dumped buffer format

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

include/gapk/formats.h

@@ -43,6 +43,9 @@ enum format_type {
 	/* Raw PCM */
 	FMT_RAWPCM_S16LE,
 
+	/* Texas Instrument calypso/locosto buffer format */
+	FMT_TI_FR,
+
 	_FMT_MAX,
 };
 

src/Makefile.am

@@ -6,7 +6,7 @@ bin_PROGRAMS = gapk
 gapk_SOURCES =	main.c	\
 		procqueue.c pq_file.c pq_format.c pq_codec.c \
 		formats.c fmt_amr.c fmt_gsm.c fmt_hr_ref.c fmt_racal.c \
-			fmt_rawpcm.c \
+			fmt_rawpcm.c fmt_ti.c \
 		codecs.c codec_pcm.c codec_hr.c codec_fr.c codec_efr.c
 
 if ENABLE_GSMHR

src/fmt_ti.c

@@ -0,0 +1,78 @@
+/* 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 <osmocom/codec/codec.h>
+
+#include <gapk/codecs.h>
+#include <gapk/formats.h>
+#include <gapk/utils.h>
+
+
+static int
+ti_fr_from_canon(uint8_t *dst, const uint8_t *src)
+{
+	int i;
+
+	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 0;
+}
+
+static int
+ti_fr_to_canon(uint8_t *dst, const uint8_t *src)
+{
+	int i;
+
+	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 0;
+}
+
+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		= 33,
+	.conv_from_canon	= ti_fr_from_canon,
+	.conv_to_canon		= ti_fr_to_canon,
+};

src/formats.c

@@ -31,6 +31,7 @@ extern const struct format_desc fmt_racal_hr;
 extern const struct format_desc fmt_racal_fr;
 extern const struct format_desc fmt_racal_efr;
 extern const struct format_desc fmt_rawpcm_s16le;
+extern const struct format_desc fmt_ti_fr;
 
 static const struct format_desc *supported_formats[_FMT_MAX] = {
 	[FMT_INVALID]		= NULL,
@@ -42,6 +43,7 @@ static const struct format_desc *supported_formats[_FMT_MAX] = {
 	[FMT_RACAL_FR]		= &fmt_racal_fr,
 	[FMT_RACAL_EFR]		= &fmt_racal_efr,
 	[FMT_RAWPCM_S16LE]	= &fmt_rawpcm_s16le,
+	[FMT_TI_FR]		= &fmt_ti_fr,
 };