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annotate spandsp-0.0.6pre17/src/spandsp/super_tone_tx.h @ 4:26cd8f1ef0b1

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import spandsp-0.0.6pre17
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Fri, 25 Jun 2010 15:50:58 +0200
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26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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1 /*
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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2 * SpanDSP - a series of DSP components for telephony
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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3 *
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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4 * super_tone_tx.h - Flexible telephony supervisory tone generation.
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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5 *
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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6 * Written by Steve Underwood <steveu@coppice.org>
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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7 *
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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8 * Copyright (C) 2001 Steve Underwood
26cd8f1ef0b1 import spandsp-0.0.6pre17
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9 *
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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10 * All rights reserved.
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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11 *
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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12 * This program is free software; you can redistribute it and/or modify
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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13 * it under the terms of the GNU Lesser General Public License version 2.1,
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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14 * as published by the Free Software Foundation.
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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15 *
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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16 * This program is distributed in the hope that it will be useful,
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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19 * GNU Lesser General Public License for more details.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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20 *
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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21 * You should have received a copy of the GNU Lesser General Public
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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22 * License along with this program; if not, write to the Free Software
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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24 *
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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25 * $Id: super_tone_tx.h,v 1.17 2009/02/10 13:06:47 steveu Exp $
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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26 */
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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27
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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28 #if !defined(_SPANDSP_SUPER_TONE_TX_H_)
26cd8f1ef0b1 import spandsp-0.0.6pre17
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29 #define _SPANDSP_SUPER_TONE_TX_H_
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30
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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31 /*! \page super_tone_tx_page Supervisory tone generation
26cd8f1ef0b1 import spandsp-0.0.6pre17
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32
26cd8f1ef0b1 import spandsp-0.0.6pre17
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33 \section super_tone_tx_page_sec_1 What does it do?
26cd8f1ef0b1 import spandsp-0.0.6pre17
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34
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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35 The supervisory tone generator may be configured to generate most of the world's
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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36 telephone supervisory tones - things like ringback, busy, number unobtainable,
26cd8f1ef0b1 import spandsp-0.0.6pre17
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37 and so on. It uses tree structure tone descriptions, which can deal with quite
26cd8f1ef0b1 import spandsp-0.0.6pre17
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38 complex cadence patterns.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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39
26cd8f1ef0b1 import spandsp-0.0.6pre17
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40 \section super_tone_tx_page_sec_2 How does it work?
26cd8f1ef0b1 import spandsp-0.0.6pre17
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41
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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42 */
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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43
26cd8f1ef0b1 import spandsp-0.0.6pre17
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44 typedef struct super_tone_tx_step_s super_tone_tx_step_t;
26cd8f1ef0b1 import spandsp-0.0.6pre17
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45
26cd8f1ef0b1 import spandsp-0.0.6pre17
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46 typedef struct super_tone_tx_state_s super_tone_tx_state_t;
26cd8f1ef0b1 import spandsp-0.0.6pre17
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47
26cd8f1ef0b1 import spandsp-0.0.6pre17
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48 #if defined(__cplusplus)
26cd8f1ef0b1 import spandsp-0.0.6pre17
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49 extern "C"
26cd8f1ef0b1 import spandsp-0.0.6pre17
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50 {
26cd8f1ef0b1 import spandsp-0.0.6pre17
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51 #endif
26cd8f1ef0b1 import spandsp-0.0.6pre17
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52
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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53 SPAN_DECLARE(super_tone_tx_step_t *) super_tone_tx_make_step(super_tone_tx_step_t *s,
26cd8f1ef0b1 import spandsp-0.0.6pre17
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54 float f1,
26cd8f1ef0b1 import spandsp-0.0.6pre17
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55 float l1,
26cd8f1ef0b1 import spandsp-0.0.6pre17
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56 float f2,
26cd8f1ef0b1 import spandsp-0.0.6pre17
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57 float l2,
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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58 int length,
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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59 int cycles);
26cd8f1ef0b1 import spandsp-0.0.6pre17
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60
26cd8f1ef0b1 import spandsp-0.0.6pre17
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61 SPAN_DECLARE(int) super_tone_tx_free_tone(super_tone_tx_step_t *s);
26cd8f1ef0b1 import spandsp-0.0.6pre17
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62
26cd8f1ef0b1 import spandsp-0.0.6pre17
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63 /*! Initialise a supervisory tone generator.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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64 \brief Initialise a supervisory tone generator.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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65 \param s The supervisory tone generator context.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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66 \param tree The supervisory tone tree to be generated.
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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67 \return The supervisory tone generator context. */
26cd8f1ef0b1 import spandsp-0.0.6pre17
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68 SPAN_DECLARE(super_tone_tx_state_t *) super_tone_tx_init(super_tone_tx_state_t *s, super_tone_tx_step_t *tree);
26cd8f1ef0b1 import spandsp-0.0.6pre17
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69
26cd8f1ef0b1 import spandsp-0.0.6pre17
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70 SPAN_DECLARE(int) super_tone_tx_release(super_tone_tx_state_t *s);
26cd8f1ef0b1 import spandsp-0.0.6pre17
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71
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72 SPAN_DECLARE(int) super_tone_tx_free(super_tone_tx_state_t *s);
26cd8f1ef0b1 import spandsp-0.0.6pre17
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73
26cd8f1ef0b1 import spandsp-0.0.6pre17
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74 /*! Generate a block of audio samples for a supervisory tone pattern.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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75 \brief Generate a block of audio samples for a supervisory tone pattern.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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76 \param s The supervisory tone context.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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77 \param amp The audio sample buffer.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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78 \param max_samples The maximum number of samples to be generated.
26cd8f1ef0b1 import spandsp-0.0.6pre17
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79 \return The number of samples generated. */
26cd8f1ef0b1 import spandsp-0.0.6pre17
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80 SPAN_DECLARE(int) super_tone_tx(super_tone_tx_state_t *s, int16_t amp[], int max_samples);
26cd8f1ef0b1 import spandsp-0.0.6pre17
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81
26cd8f1ef0b1 import spandsp-0.0.6pre17
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82 #if defined(__cplusplus)
26cd8f1ef0b1 import spandsp-0.0.6pre17
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83 }
26cd8f1ef0b1 import spandsp-0.0.6pre17
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84 #endif
26cd8f1ef0b1 import spandsp-0.0.6pre17
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85
26cd8f1ef0b1 import spandsp-0.0.6pre17
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86 #endif
26cd8f1ef0b1 import spandsp-0.0.6pre17
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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87 /*- End of file ------------------------------------------------------------*/

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