--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.6pre17/src/spandsp/private/fax_modems.h	Fri Jun 25 15:50:58 2010 +0200
@@ -0,0 +1,127 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * private/fax_modems.h - definitions for the analogue modem set for fax processing
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2008 Steve Underwood
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1,
+ * 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: fax_modems.h,v 1.4 2009/09/04 14:38:47 steveu Exp $
+ */
+
+/*! \file */
+
+#if !defined(_SPANDSP_PRIVATE_FAX_MODEMS_H_)
+#define _SPANDSP_PRIVATE_FAX_MODEMS_H_
+
+/*!
+    The set of modems needed for FAX, plus the auxilliary stuff, like tone generation.
+*/
+struct fax_modems_state_s
+{
+    /*! TRUE is talker echo protection should be sent for the image modems */
+    int use_tep;
+
+    /*! If TRUE, transmit silence when there is nothing else to transmit. If FALSE return only
+        the actual generated audio. Note that this only affects untimed silences. Timed silences
+        (e.g. the 75ms silence between V.21 and a high speed modem) will alway be transmitted as
+        silent audio. */
+    int transmit_on_idle;
+
+    /*! \brief An HDLC context used when transmitting HDLC messages. */
+    hdlc_tx_state_t hdlc_tx;
+    /*! \brief An HDLC context used when receiving HDLC messages. */
+    hdlc_rx_state_t hdlc_rx;
+    /*! \brief A V.21 FSK modem context used when transmitting HDLC over V.21
+               messages. */
+    fsk_tx_state_t v21_tx;
+    /*! \brief A V.21 FSK modem context used when receiving HDLC over V.21
+               messages. */
+    fsk_rx_state_t v21_rx;
+    /*! \brief A V.17 modem context used when sending FAXes at 7200bps, 9600bps
+               12000bps or 14400bps */
+    v17_tx_state_t v17_tx;
+    /*! \brief A V.29 modem context used when receiving FAXes at 7200bps, 9600bps
+               12000bps or 14400bps */
+    v17_rx_state_t v17_rx;
+    /*! \brief A V.29 modem context used when sending FAXes at 7200bps or
+               9600bps */
+    v29_tx_state_t v29_tx;
+    /*! \brief A V.29 modem context used when receiving FAXes at 7200bps or
+               9600bps */
+    v29_rx_state_t v29_rx;
+    /*! \brief A V.27ter modem context used when sending FAXes at 2400bps or
+               4800bps */
+    v27ter_tx_state_t v27ter_tx;
+    /*! \brief A V.27ter modem context used when receiving FAXes at 2400bps or
+               4800bps */
+    v27ter_rx_state_t v27ter_rx;
+    /*! \brief Used to insert timed silences. */
+    silence_gen_state_t silence_gen;
+    /*! \brief CED or CNG generator */
+    modem_connect_tones_tx_state_t connect_tx;
+    /*! \brief CED or CNG detector */
+    modem_connect_tones_rx_state_t connect_rx;
+    /*! \brief */
+    dc_restore_state_t dc_restore;
+
+    /*! \brief The currently select receiver type */
+    int current_rx_type;
+    /*! \brief The currently select transmitter type */
+    int current_tx_type;
+
+    /*! \brief TRUE if a carrier is present. Otherwise FALSE. */
+    int rx_signal_present;
+    /*! \brief TRUE if a modem has trained correctly. */
+    int rx_trained;
+    /*! \brief TRUE if an HDLC frame has been received correctly. */
+    int rx_frame_received;
+
+    /*! The current receive signal handler */
+    span_rx_handler_t *rx_handler;
+    /*! The current receive missing signal fill-in handler */
+    span_rx_fillin_handler_t *rx_fillin_handler;
+    void *rx_user_data;
+
+    /*! The current transmit signal handler */
+    span_tx_handler_t *tx_handler;
+    void *tx_user_data;
+
+    /*! The next transmit signal handler, for two stage transmit operations.
+        E.g. a short silence followed by a modem signal. */
+    span_tx_handler_t *next_tx_handler;
+    void *next_tx_user_data;
+
+    /*! The current bit rate of the transmitter. */
+    int tx_bit_rate;
+    /*! The current bit rate of the receiver. */
+    int rx_bit_rate;
+
+    /*! If TRUE, transmission is in progress */
+    int transmit;
+    /*! \brief Audio logging file handle for received audio. */
+    int audio_rx_log;
+    /*! \brief Audio logging file handle for transmitted audio. */
+    int audio_tx_log;
+    /*! \brief Error and flow logging control */
+    logging_state_t logging;
+};
+
+#endif
+/*- End of file ------------------------------------------------------------*/