--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.6pre17/src/spandsp/private/async.h	Fri Jun 25 15:50:58 2010 +0200
@@ -0,0 +1,91 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * private/async.h - Asynchronous serial bit stream encoding and decoding
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2003 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: async.h,v 1.1 2008/11/30 10:17:31 steveu Exp $
+ */
+
+#if !defined(_SPANDSP_PRIVATE_ASYNC_H_)
+#define _SPANDSP_PRIVATE_ASYNC_H_
+
+/*!
+    Asynchronous data transmit descriptor. This defines the state of a single
+    working instance of a byte to asynchronous serial converter, for use
+    in FSK modems.
+*/
+struct async_tx_state_s
+{
+    /*! \brief The number of data bits per character. */
+    int data_bits;
+    /*! \brief The type of parity. */
+    int parity;
+    /*! \brief The number of stop bits per character. */
+    int stop_bits;
+    /*! \brief A pointer to the callback routine used to get characters to be transmitted. */
+    get_byte_func_t get_byte;
+    /*! \brief An opaque pointer passed when calling get_byte. */
+    void *user_data;
+
+    /*! \brief A current, partially transmitted, character. */
+    int byte_in_progress;
+    /*! \brief The current bit position within a partially transmitted character. */
+    int bitpos;
+    /*! \brief Parity bit. */
+    int parity_bit;
+};
+
+/*!
+    Asynchronous data receive descriptor. This defines the state of a single
+    working instance of an asynchronous serial to byte converter, for use
+    in FSK modems.
+*/
+struct async_rx_state_s
+{
+    /*! \brief The number of data bits per character. */
+    int data_bits;
+    /*! \brief The type of parity. */
+    int parity;
+    /*! \brief The number of stop bits per character. */
+    int stop_bits;
+    /*! \brief TRUE if V.14 rate adaption processing should be performed. */
+    int use_v14;
+    /*! \brief A pointer to the callback routine used to handle received characters. */
+    put_byte_func_t put_byte;
+    /*! \brief An opaque pointer passed when calling put_byte. */
+    void *user_data;
+
+    /*! \brief A current, partially complete, character. */
+    int byte_in_progress;
+    /*! \brief The current bit position within a partially complete character. */
+    int bitpos;
+    /*! \brief Parity bit. */
+    int parity_bit;
+
+    /*! A count of the number of parity errors seen. */
+    int parity_errors;
+    /*! A count of the number of character framing errors seen. */
+    int framing_errors;
+};
+
+#endif
+/*- End of file ------------------------------------------------------------*/