--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.3/spandsp-0.0.3/src/spandsp/t38_terminal.h	Fri Jun 25 16:00:21 2010 +0200
@@ -0,0 +1,109 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * t38_terminal.h - An implementation of T.38, less the packet exchange part
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2005 Steve Underwood
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: t38_terminal.h,v 1.11 2006/12/07 13:22:26 steveu Exp $
+ */
+
+/*! \file */
+
+#if !defined(_T38_TERMINAL_H_)
+#define _T38_TERMINAL_H_
+
+/*! \page t38_terminal_page T.38 real time FAX over IP termination
+\section t38_terminal_page_sec_1 What does it do?
+
+\section t38_terminal_page_sec_2 How does it work?
+*/
+
+#define T38_RX_BUF_LEN          2048
+#define T38_TX_BUF_LEN          16384
+
+/* Make sure the HDLC frame buffers are big enough for ECM frames. */
+#define T38_MAX_HDLC_LEN        260
+
+typedef struct
+{
+    t38_core_state_t t38;
+
+    uint8_t hdlc_tx_buf[T38_MAX_HDLC_LEN];
+    int hdlc_tx_len;
+    int hdlc_tx_ptr;
+    int timed_step;
+
+    uint8_t tx_data[T38_TX_BUF_LEN];
+    int tx_out_bytes;
+
+    int next_tx_indicator;
+    int current_tx_data_type;
+
+    /*! \brief TRUE is a carrier is presnt. Otherwise FALSE. */
+    int rx_signal_present;
+
+    /*! \brief A tone generator context used to generate supervisory tones during
+               FAX handling. */
+    tone_gen_state_t tone_gen;
+
+    t30_state_t t30_state;
+
+    int current_rx_type;
+    int current_tx_type;
+
+    /*! \brief TRUE is there has been some T.38 data missed */
+    int missing_data;
+
+    /*! The number of octets to send in each image packet (non-ECM or ECM) at the current
+        rate and the current specified packet interval. */
+    int octets_per_data_packet;
+
+    int32_t samples;
+    int32_t next_tx_samples;
+    int32_t timeout_rx_samples;
+
+    logging_state_t logging;
+} t38_terminal_state_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int t38_terminal_send_timeout(t38_terminal_state_t *s, int samples);
+
+/*! \brief Initialise a termination mode T.38 context.
+    \param s The T.38 context.
+    \param calling_party TRUE if the context is for a calling party. FALSE if the
+           context is for an answering party.
+    \param tx_packet_handler A callback routine to encapsulate and transmit T.38 packets.
+    \param tx_packet_user_data An opaque pointer passed to the tx_packet_handler routine.
+    \return A pointer to the termination mode T.38 context, or NULL if there was a problem. */
+t38_terminal_state_t *t38_terminal_init(t38_terminal_state_t *s,
+                                        int calling_party,
+                                        t38_tx_packet_handler_t *tx_packet_handler,
+                                        void *tx_packet_user_data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/*- End of file ------------------------------------------------------------*/