From 95ab4d90ad6ee7644fd9a0b0d70a59e6c6b2dbda Mon Sep 17 00:00:00 2001 From: Bent Bisballe Nyeng Date: Mon, 30 Jul 2012 22:05:11 +0200 Subject: AudioIn/Out classes based on Alsa. --- src/audioin.h | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 src/audioin.h (limited to 'src/audioin.h') diff --git a/src/audioin.h b/src/audioin.h new file mode 100644 index 0000000..99d2651 --- /dev/null +++ b/src/audioin.h @@ -0,0 +1,81 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * audioin.h + * + * Wed Sep 30 11:36:18 CEST 2009 + * Copyright 2011 Bent Bisballe Nyeng + * deva@aasimon.org + ****************************************************************************/ + +/* + * This file is part of libaudioin. + * + * libaudioin is free 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 2 of the License, or + * (at your option) any later version. + * + * libaudioin 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with libaudioin; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ +#ifndef __LIBAUDIOIN_AUDIOIN_H__ +#define __LIBAUDIOIN_AUDIOIN_H__ + +// Use the newer ALSA API +#define ALSA_PCM_NEW_HW_PARAMS_API + +#include +#include +#include +#include +#include + +typedef float sample_t; + +class AudioIn { +public: + class CouldNotOpenPCMDevice : public std::exception {}; + class UnableToSetHWParams : public std::exception {}; + class PcmBufferTooSmall : public std::exception {}; + class OverRun : public std::exception {}; + class ReadError : public std::exception {}; + class ShortRead : public std::exception {}; + class CouldNotInitialiseParams : public std::exception {}; + class CouldNotSetAccessMode : public std::exception {}; + class CouldNotSetFormat : public std::exception {}; + class CouldNotSetChannelNumber : public std::exception {}; + class UnableToSetSampleRate : public std::exception {}; + class UnableToSetPeriodSize : public std::exception {}; + class MixerInitilisationFailed : public std::exception {}; + class MixerNotInitialised : public std::exception {}; + class InvalidMixerLevel : public std::exception {}; + class IllegalChannelNumber : public std::exception {}; + class CouldNotSetMixerLevel : public std::exception {}; + + AudioIn(std::string device, std::string mixer, unsigned int srate, int ch); + ~AudioIn(); + + size_t read(sample_t *buf, size_t size); + + int set_level(unsigned int channel, float level); + +private: + int channels; + snd_pcm_t *handle; + snd_pcm_hw_params_t *params; + unsigned int val; + int dir; + snd_pcm_uframes_t frames; + + snd_mixer_t *mixhnd; + snd_mixer_elem_t *elem; + long lvl_min, lvl_max; +}; + +#endif/*__LIBAUDIOIN_AUDIOIN_H__*/ -- cgit v1.2.3