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094c26aa68
Adds binaural synthesis to bridge_softmix (via convolution using libfftw3). Binaural synthesis is conducted at 48kHz. For a conference, only one spatial representation is rendered. The default rendering is applied for mono-capable channels. ASTERISK-26292 Change-Id: Iecdb381b6adc17c961049658678f6219adae1ddf
64 lines
2.5 KiB
C
64 lines
2.5 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2016, Frank Haase, Dennis Guse
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*
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* Frank Haase <fra.haase@gmail.com>
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* Dennis Guse <dennis.guse@alumni.tu-berlin.de>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Multi-party software binaural channel mixing (header)
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*
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* \author Frank Haase <fra.haase@googlemail.com>
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* \author Dennis Guse <dennis.guse@alumni.tu-berlin.de>
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*
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* \ingroup bridges
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*/
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#ifndef _ASTERISK_HRIRS_CONFIGURATION_H
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#define _ASTERISK_HRIRS_CONFIGURATION_H
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#include "hrirs.h"
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/*! The size of possible positions in the virtual enviroment build with the help
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* of binaural audio processing.
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*/
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#define POSITION_SIZE 181
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#if POSITION_SIZE != HRIRS_IMPULSE_SIZE
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#error "The conference is designed for 181 individual places at the moment. If you want to change this please alter the positions array first."
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#endif
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/*! The offset for the left channel audio channel. */
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#define HRIRS_CHANNEL_LEFT 0
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/*! The offset for the right channel audio channel. */
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#define HRIRS_CHANNEL_RIGHT 1
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/*! The ast_binaural_positions array contains a specific plan to order conference
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* participants in the virtual enviroment.
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*/
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static unsigned int ast_binaural_positions[POSITION_SIZE] = {
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90, 80, 100, 70, 110, 60, 120, 50, 130, 40, 140, 20, 160, 0, 180, 85, 95, 75, 105, 65, 115,
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55, 125, 45, 135, 30, 150, 10, 170, 87, 93, 82, 98, 77, 103, 72, 108, 67, 113, 62, 118, 57,
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123, 52, 128, 47, 133, 42, 138, 35, 145, 25, 155, 15, 165, 5, 175, 88, 92, 86, 83, 97, 81,
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99, 78, 102, 76, 104, 73, 94, 107, 71, 109, 68, 112, 66, 114, 63, 117, 61, 119, 58, 122, 56,
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124, 53, 127, 51, 129, 48, 132, 46, 134, 43, 137, 41, 139, 37, 143, 32, 148, 27, 153, 22,
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158, 17, 163, 12, 168, 7, 96, 173, 2, 178, 89, 91, 84, 79, 101, 74, 106, 69, 111, 64, 116,
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59, 121, 54, 126, 49, 131, 44, 136, 38, 142, 36, 144, 33, 147, 31, 149, 28, 152, 26, 154,
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23, 157, 21, 159, 162, 16, 164, 13, 167, 11, 169, 8, 172, 6, 174, 3, 177, 1, 179, 39, 141,
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34, 146, 29, 151, 24, 156, 19, 161, 14, 166, 9, 171, 4, 18, 176 };
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#endif /* _ASTERISK_HRIRS_CONFIGURATION_H */
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