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qTox/src/audiofilterer.h
Dubslow 15917d1a01
Add experimental echo cancellation to qTox
It compiles with modified OpenAL (unchanged logic otherwise), but effectiveness needs testing (like uTox)
2015-02-18 01:10:40 -06:00

51 lines
1.5 KiB
C++

/*
Copyright (C) 2014 by Project Tox <https://tox.im>
This file is part of qTox, a Qt-based graphical interface for Tox.
This program is libre software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 COPYING file for more details.
*/
#ifdef QTOX_FILTER_AUDIO
#ifndef AUDIOFILTERER_H
#define AUDIOFILTERER_H
#include <cstdint>
#ifndef _FILTER_AUDIO
typedef struct Filter_Audio Filter_Audio;
#endif
class AudioFilterer
{
public:
explicit AudioFilterer() = default;
~AudioFilterer();
void startFilter(unsigned int fs);
void closeFilter();
/* Enable/disable filters. 1 to enable, 0 to disable. */
bool enableDisableFilters(int echo, int noise, int gain);
bool filterAudio(int16_t* data, int samples);
/* Give the audio output from your software to this function so it knows what echo to cancel from the frame */
bool passAudioOutput(const int16_t *data, int samples);
/* Tell the echo canceller how much time in ms it takes for audio to be played and recorded back after. */
bool setEchoDelayMs(int16_t msInSndCardBuf);
private:
struct Filter_Audio* filter{nullptr};
};
#endif // AUDIOFILTERER_H
#endif // QTOX_FILTER_AUDIO