/* -*- 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__*/