--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.6pre17/src/spandsp/fax_modems.h	Fri Jun 25 15:50:58 2010 +0200
@@ -0,0 +1,91 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * 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 1.11 2009/04/26 12:55:23 steveu Exp $
+ */
+
+/*! \file */
+
+#if !defined(_SPANDSP_FAX_MODEMS_H_)
+#define _SPANDSP_FAX_MODEMS_H_
+
+enum
+{
+    FAX_MODEM_NONE = -1,
+    FAX_MODEM_FLUSH = 0,
+    FAX_MODEM_SILENCE_TX,
+    FAX_MODEM_SILENCE_RX,
+    FAX_MODEM_CED_TONE,
+    FAX_MODEM_CNG_TONE,
+    FAX_MODEM_NOCNG_TONE,
+    FAX_MODEM_V21_TX,
+    FAX_MODEM_V17_TX,
+    FAX_MODEM_V27TER_TX,
+    FAX_MODEM_V29_TX,
+    FAX_MODEM_V21_RX,
+    FAX_MODEM_V17_RX,
+    FAX_MODEM_V27TER_RX,
+    FAX_MODEM_V29_RX
+};
+
+/*!
+    The set of modems needed for FAX, plus the auxilliary stuff, like tone generation.
+*/
+typedef struct fax_modems_state_s fax_modems_state_t;
+
+#if defined(__cplusplus)
+extern "C"
+{
+#endif
+
+/* N.B. the following are currently a work in progress */
+SPAN_DECLARE(int) fax_modems_v17_v21_rx(void *user_data, const int16_t amp[], int len);
+SPAN_DECLARE(int) fax_modems_v27ter_v21_rx(void *user_data, const int16_t amp[], int len);
+SPAN_DECLARE(int) fax_modems_v29_v21_rx(void *user_data, const int16_t amp[], int len);
+SPAN_DECLARE(int) fax_modems_v17_v21_rx_fillin(void *user_data, int len);
+SPAN_DECLARE(int) fax_modems_v27ter_v21_rx_fillin(void *user_data, int len);
+SPAN_DECLARE(int) fax_modems_v29_v21_rx_fillin(void *user_data, int len);
+SPAN_DECLARE(void) fax_modems_start_rx_modem(fax_modems_state_t *s, int which);
+
+SPAN_DECLARE(void) fax_modems_set_tep_mode(fax_modems_state_t *s, int use_tep);
+
+SPAN_DECLARE(fax_modems_state_t *) fax_modems_init(fax_modems_state_t *s,
+                                                   int use_tep,
+                                                   hdlc_frame_handler_t hdlc_accept,
+                                                   hdlc_underflow_handler_t hdlc_tx_underflow,
+                                                   put_bit_func_t non_ecm_put_bit,
+                                                   get_bit_func_t non_ecm_get_bit,
+                                                   tone_report_func_t tone_callback,
+                                                   void *user_data);
+
+SPAN_DECLARE(int) fax_modems_release(fax_modems_state_t *s);
+
+SPAN_DECLARE(int) fax_modems_free(fax_modems_state_t *s);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif
+/*- End of file ------------------------------------------------------------*/