1 files changed, 78 insertions, 0 deletions
diff --git a/src/fmt_ti.c b/src/fmt_ti.c
new file mode 100644
index 0000000..862d694
--- /dev/null
+++ b/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,
+};