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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__*/