1 files changed, 57 insertions, 0 deletions
diff --git a/include/osmocom/isdn/v110.h b/include/osmocom/isdn/v110.h
new file mode 100644
index 00000000..9555932e
--- /dev/null
+++ b/include/osmocom/isdn/v110.h
@@ -0,0 +1,57 @@
+#pragma once
+
+#include <osmocom/core/bits.h>
+
+/* See Section 5.1.2.1 of ITU-T V.110 */
+#define MAX_D_BITS	48
+#define MAX_E_BITS	7
+#define MAX_S_BITS	9
+#define MAX_X_BITS	2
+
+/*! a 'decoded' representation of a single V.110 frame. contains unpacket D, E, S and X bits */
+struct osmo_v110_decoded_frame {
+	ubit_t d_bits[MAX_D_BITS];
+	ubit_t e_bits[MAX_E_BITS];
+	ubit_t s_bits[MAX_S_BITS];
+	ubit_t x_bits[MAX_X_BITS];
+};
+
+int osmo_v110_decode_frame(struct osmo_v110_decoded_frame *fr, const ubit_t *ra_bits, size_t n_bits);
+int osmo_v110_encode_frame(ubit_t *ra_bits, size_t n_bits, const struct osmo_v110_decoded_frame *fr);
+
+void osmo_v110_ubit_dump(FILE *outf, const ubit_t *fr, size_t in_len);
+
+
+/*! enum for each supported V.110 synchronous RA1 function (one for each user bitrate) */
+enum osmo_v100_sync_ra1_rate {
+	OSMO_V110_SYNC_RA1_600,
+	OSMO_V110_SYNC_RA1_1200,
+	OSMO_V110_SYNC_RA1_2400,
+	OSMO_V110_SYNC_RA1_4800,
+	OSMO_V110_SYNC_RA1_7200,
+	OSMO_V110_SYNC_RA1_9600,
+	OSMO_V110_SYNC_RA1_12000,
+	OSMO_V110_SYNC_RA1_14400,
+	OSMO_V110_SYNC_RA1_19200,
+	OSMO_V110_SYNC_RA1_24000,
+	OSMO_V110_SYNC_RA1_28800,
+	OSMO_V110_SYNC_RA1_38400,
+	_NUM_OSMO_V110_SYNC_RA1
+};
+
+extern const ubit_t osmo_v110_e1e2e3[_NUM_OSMO_V110_SYNC_RA1][3];
+
+#define osmo_v110_e1e2e3_set(e_bits, rate) \
+	memcpy(e_bits, osmo_v110_e1e2e3[rate], 3)
+#define osmo_v110_e1e2e3_cmp(e_bits, rate) \
+	memcmp(e_bits, osmo_v110_e1e2e3[rate], 3)
+
+int osmo_v110_sync_ra1_get_user_data_chunk_bitlen(enum osmo_v100_sync_ra1_rate rate);
+int osmo_v110_sync_ra1_get_user_data_rate(enum osmo_v100_sync_ra1_rate rate);
+int osmo_v110_sync_ra1_get_intermediate_rate(enum osmo_v100_sync_ra1_rate rate);
+
+int osmo_v110_sync_ra1_user_to_ir(enum osmo_v100_sync_ra1_rate rate, struct osmo_v110_decoded_frame *fr,
+				  const ubit_t *d_in, size_t in_len);
+
+int osmo_v110_sync_ra1_ir_to_user(enum osmo_v100_sync_ra1_rate rate, ubit_t *d_out, size_t out_len,
+				  const struct osmo_v110_decoded_frame *fr);