/usr/include/spandsp/private/super_tone_tx.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 | /*
* SpanDSP - a series of DSP components for telephony
*
* private/super_tone_tx.h - Flexible telephony supervisory tone generation.
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2001 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.
*/
#if !defined(_SPANDSP_PRIVATE_SUPER_TONE_TX_H_)
#define _SPANDSP_PRIVATE_SUPER_TONE_TX_H_
struct super_tone_tx_step_s
{
tone_gen_tone_descriptor_t tone[4];
int tone_on;
int length;
int cycles;
super_tone_tx_step_t *next;
super_tone_tx_step_t *nest;
};
struct super_tone_tx_state_s
{
tone_gen_tone_descriptor_t tone[4];
uint32_t phase[4];
int current_position;
int level;
super_tone_tx_step_t *levels[4];
int cycles[4];
};
#endif
/*- End of file ------------------------------------------------------------*/
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