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/* -*- 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 <asoundlib.h>
#include <exception>
#include <stdlib.h>
#include <unistd.h>
#include <string>
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__*/
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