00001 /*!@file Devices/AudioGrabber.H Grab audio samples from /dev/dsp */ 00002 00003 // //////////////////////////////////////////////////////////////////// // 00004 // The iLab Neuromorphic Vision C++ Toolkit - Copyright (C) 2001 by the // 00005 // University of Southern California (USC) and the iLab at USC. // 00006 // See http://iLab.usc.edu for information about this project. // 00007 // //////////////////////////////////////////////////////////////////// // 00008 // Major portions of the iLab Neuromorphic Vision Toolkit are protected // 00009 // under the U.S. patent ``Computation of Intrinsic Perceptual Saliency // 00010 // in Visual Environments, and Applications'' by Christof Koch and // 00011 // Laurent Itti, California Institute of Technology, 2001 (patent // 00012 // pending; application number 09/912,225 filed July 23, 2001; see // 00013 // http://pair.uspto.gov/cgi-bin/final/home.pl for current status). // 00014 // //////////////////////////////////////////////////////////////////// // 00015 // This file is part of the iLab Neuromorphic Vision C++ Toolkit. // 00016 // // 00017 // The iLab Neuromorphic Vision C++ Toolkit is free software; you can // 00018 // redistribute it and/or modify it under the terms of the GNU General // 00019 // Public License as published by the Free Software Foundation; either // 00020 // version 2 of the License, or (at your option) any later version. // 00021 // // 00022 // The iLab Neuromorphic Vision C++ Toolkit is distributed in the hope // 00023 // that it will be useful, but WITHOUT ANY WARRANTY; without even the // 00024 // implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR // 00025 // PURPOSE. See the GNU General Public License for more details. // 00026 // // 00027 // You should have received a copy of the GNU General Public License // 00028 // along with the iLab Neuromorphic Vision C++ Toolkit; if not, write // 00029 // to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, // 00030 // Boston, MA 02111-1307 USA. // 00031 // //////////////////////////////////////////////////////////////////// // 00032 // 00033 // Primary maintainer for this file: Laurent Itti <itti@usc.edu> 00034 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Devices/AudioGrabber.H $ 00035 // $Id: AudioGrabber.H 14682 2011-04-05 01:11:05Z farhan $ 00036 // 00037 00038 #ifndef AUDIOGRABBER_H_DEFINED 00039 #define AUDIOGRABBER_H_DEFINED 00040 00041 #include "Component/ModelComponent.H" 00042 #include "Component/ModelParam.H" 00043 #include "Util/Types.H" 00044 #include "Audio/AudioBuffer.H" 00045 00046 //! Class to grab audio samples from an audio device 00047 /*! For now, grabbing is done using a blocking read() onto the DSP device.*/ 00048 00049 class AudioGrabber : public ModelComponent 00050 { 00051 public: 00052 //! Constructor 00053 AudioGrabber(OptionManager& mgr, 00054 const std::string& descrName = "Audio Grabber Driver", 00055 const std::string& tagName = "AudioGrabber"); 00056 00057 //! Destructor 00058 ~AudioGrabber(); 00059 00060 //! Grab a buffer 00061 /* A fatal error will arise if T has a different number of bits than 00062 itsBits. Typically, T should be byte, int16, etc. If buf was not 00063 empty its contents will be destroyed. */ 00064 template <class T> 00065 void grab(AudioBuffer<T>& buf) const; 00066 00067 protected: 00068 OModelParam<std::string> itsDevName; //!< audio device name 00069 OModelParam<uint> itsBits; //!< bits per sample (8 or 16) 00070 OModelParam<uint> itsFreq; //!< sampling frequency (Hz) 00071 OModelParam<uint> itsBufsamples; //!< samples per buffer 00072 OModelParam<uint> itsChans; //!< number of channels 00073 OModelParam<bool> itsInterleaved; //!< channel data interleaved? 00074 00075 //! get started (see ModelComponent.H) 00076 void start2(); 00077 00078 //! get stopped (see ModelComponent.H) 00079 void stop1(); 00080 00081 private: 00082 int itsFd; // file descriptor for device 00083 }; 00084 00085 // ###################################################################### 00086 /* So things look consistent in everyone's emacs... */ 00087 /* Local Variables: */ 00088 /* indent-tabs-mode: nil */ 00089 /* End: */ 00090 00091 #endif
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