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authorSylvain Munaut <tnt@246tNt.com>2011-02-25 15:31:54 +0100
committerSylvain Munaut <tnt@246tNt.com>2011-02-25 15:31:54 +0100
commitcfaec3a2f6590bafcaecbc580eba798988a9a2fa (patch)
treed59ee2946c09486dd6677e394947ef3a702229f4 /src/fmt_ti.c
parent3c9c2fb6eeb04dc6f6e4da43aebe9ac920f1e8f3 (diff)
format: Add support for the TI calypso/locosto dumped buffer format
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Diffstat (limited to 'src/fmt_ti.c')
-rw-r--r--src/fmt_ti.c78
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,
+};