Missing data modems files. They are a work in progress at this time, so don't

expect any functionality.

libs/spandsp/src/spandsp/data_modems.h

+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * data_modems.h - definitions for the analogue modem set for data processing
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2011 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.
+ */
+
+/*! \file */
+
+#if !defined(_SPANDSP_DATA_MODEMS_H_)
+#define _SPANDSP_DATA_MODEMS_H_
+
+enum
+{
+    DATA_MODEM_NONE = -1,
+    DATA_MODEM_FLUSH = 0,
+    DATA_MODEM_SILENCE,
+    DATA_MODEM_CED_TONE,
+    DATA_MODEM_CNG_TONE,
+    DATA_MODEM_V8,
+    DATA_MODEM_BELL103,
+    DATA_MODEM_BELL202,
+    DATA_MODEM_V21,
+    DATA_MODEM_V23,
+    DATA_MODEM_V22BIS,
+    DATA_MODEM_V32BIS,
+    DATA_MODEM_V34
+};
+
+/*!
+    The set of modems needed for data, plus the auxilliary stuff, like tone generation.
+*/
+typedef struct data_modems_state_s data_modems_state_t;
+
+#if defined(__cplusplus)
+extern "C"
+{
+#endif
+
+/* N.B. the following are currently a work in progress */
+SPAN_DECLARE(const char *) data_modems_modulation_to_str(int modulation_scheme);
+
+SPAN_DECLARE(void) data_modems_set_tep_mode(data_modems_state_t *s, int use_tep);
+
+SPAN_DECLARE(logging_state_t *) data_modems_get_logging_state(data_modems_state_t *s);
+
+SPAN_DECLARE(int) data_modems_restart(data_modems_state_t *s);
+
+SPAN_DECLARE(void) data_modems_set_async_mode(data_modems_state_t *s,
+                                              int data_bits,
+                                              int parity_bits,
+                                              int stop_bits);
+
+SPAN_DECLARE(void) data_modems_set_modem_type(data_modems_state_t *s, int which, int baud_rate, int bit_rate);
+
+SPAN_DECLARE(int) data_modems_rx(data_modems_state_t *s, const int16_t amp[], int len);
+
+SPAN_DECLARE(int) data_modems_rx_fillin(data_modems_state_t *s, int len);
+
+SPAN_DECLARE(int) data_modems_tx(data_modems_state_t *s, int16_t amp[], int max_len);
+
+SPAN_DECLARE(data_modems_state_t *) data_modems_init(data_modems_state_t *s,
+                                                     bool calling_party,
+                                                     put_msg_func_t put_msg,
+                                                     get_msg_func_t get_msg,
+                                                     void *user_data);
+
+SPAN_DECLARE(int) data_modems_release(data_modems_state_t *s);
+
+SPAN_DECLARE(int) data_modems_free(data_modems_state_t *s);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif
+/*- End of file ------------------------------------------------------------*/

libs/spandsp/src/spandsp/private/data_modems.h

+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * private/data_modems.h - definitions for the analogue modem set for data processing
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2011 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.
+ */
+
+/*! \file */
+
+#if !defined(_SPANDSP_PRIVATE_DATA_MODEMS_H_)
+#define _SPANDSP_PRIVATE_DATA_MODEMS_H_
+
+/*!
+    The set of modems needed for data, plus the auxilliary stuff, like tone generation.
+*/
+struct data_modems_state_s
+{
+    bool calling_party;
+    /*! True is talker echo protection should be sent for the modems which support this */
+    bool 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. */
+    bool transmit_on_idle;
+
+    get_bit_func_t get_bit;
+    void *get_user_data;
+    put_bit_func_t put_bit;
+    void *put_user_data;
+
+    void *user_data;
+
+    put_msg_func_t put_msg;
+    get_msg_func_t get_msg;
+
+    v42_state_t v42;
+    v42bis_state_t v42bis;
+
+    int use_v14;
+    async_tx_state_t async_tx;
+    async_rx_state_t async_rx;
+
+    union
+    {
+        v8_state_t v8;
+        struct
+        {
+            /*! \brief Tone generator */
+            modem_connect_tones_tx_state_t tx;
+            /*! \brief Tone detector */
+            modem_connect_tones_rx_state_t rx;
+        } tones;
+        struct
+        {
+            /*! \brief FSK transmit modem context used for 103, V.21 and V.23. */
+            fsk_tx_state_t tx;
+            /*! \brief FSK receive modem context used for 103, V.21 and V.23. */
+            fsk_rx_state_t rx;
+        } fsk;
+        /*! \brief V.22bis modem context */
+        v22bis_state_t v22bis;
+#if defined(SPANDSP_SUPPORT_V32BIS)
+        /*! \brief V.32bis modem context */
+        v32bis_state_t v32bis;
+#endif
+#if defined(SPANDSP_SUPPORT_V34)
+        /*! \brief V.22bis modem context */
+        v34_state_t v34;
+#endif
+        /*! \brief Used to insert timed silences. */
+        silence_gen_state_t silence_gen;
+    } modems;
+    /*! \brief */
+    dc_restore_state_t dc_restore;
+
+    int current_modem;
+    int queued_modem;
+    int queued_baud_rate;
+    int queued_bit_rate;
+
+    /*! \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. */
+    bool rx_signal_present;
+    /*! \brief True if a modem has trained correctly. */
+    bool rx_trained;
+    /*! \brief True if an HDLC frame has been received correctly. */
+    bool 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;
+
+    /*! \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 ------------------------------------------------------------*/