/usr/include/spandsp/fax_modems.h is in libspandsp-dev 0.0.6-2+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | /*
* 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.
*/
/*! \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
/*! Convert a FAX modem type to a short text description.
\brief Convert a FAX modem type to a short text description.
\param modem The modem code.
\return A pointer to the description. */
SPAN_DECLARE(const char *) fax_modem_to_str(int modem);
/* N.B. the following are currently a work in progress */
SPAN_DECLARE_NONSTD(int) fax_modems_v17_v21_rx(void *user_data, const int16_t amp[], int len);
SPAN_DECLARE_NONSTD(int) fax_modems_v27ter_v21_rx(void *user_data, const int16_t amp[], int len);
SPAN_DECLARE_NONSTD(int) fax_modems_v29_v21_rx(void *user_data, const int16_t amp[], int len);
SPAN_DECLARE_NONSTD(int) fax_modems_v17_v21_rx_fillin(void *user_data, int len);
SPAN_DECLARE_NONSTD(int) fax_modems_v27ter_v21_rx_fillin(void *user_data, int len);
SPAN_DECLARE_NONSTD(int) fax_modems_v29_v21_rx_fillin(void *user_data, int len);
SPAN_DECLARE_NONSTD(void) fax_modems_hdlc_tx_frame(void *user_data, const uint8_t *msg, 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(int) fax_modems_restart(fax_modems_state_t *s);
/*! Get a pointer to the logging context associated with a FAX modems context.
\brief Get a pointer to the logging context associated with a FAX modems context.
\param s The FAX modems context.
\return A pointer to the logging context, or NULL.
*/
SPAN_DECLARE(logging_state_t *) fax_modems_get_logging_state(fax_modems_state_t *s);
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 ------------------------------------------------------------*/
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