AudioMixer.C

Go to the documentation of this file.
00001 /*!@file Devices/AudioMixer.C A simple interface to select audio recording source */
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/AudioMixer.C $
00035 // $Id: AudioMixer.C 7183 2006-09-20 00:02:57Z rjpeters $
00036 //
00037 
00038 #include "Devices/AudioMixer.H"
00039 
00040 #include "Component/OptionManager.H"
00041 #include "Devices/DeviceOpts.H"
00042 #include "Util/Types.H"
00043 #include "Util/log.H"
00044 
00045 #include <fcntl.h>
00046 #include <stdio.h>
00047 #include <stdlib.h>
00048 #include <sys/ioctl.h>
00049 #ifdef HAVE_SYS_SOUNDCARD_H
00050 #  include <sys/soundcard.h>
00051 #endif
00052 #include <unistd.h>
00053 
00054 // ######################################################################
00055 AudioMixer::AudioMixer(OptionManager& mgr,
00056                        const std::string& descrName,
00057                        const std::string& tagName) :
00058   ModelComponent(mgr, descrName, tagName),
00059   DevName(&OPT_AudioMixerDevice, this), // see Devices/DeviceOpts.{H,C}
00060   InpLine(&OPT_AudioMixerLineIn, this), // see Devices/DeviceOpts.{H,C}
00061   InpCD(&OPT_AudioMixerCdIn, this), // see Devices/DeviceOpts.{H,C}
00062   InpMic(&OPT_AudioMixerMicIn, this), // see Devices/DeviceOpts.{H,C}
00063   fd(-1)
00064 {  }
00065 
00066 // ######################################################################
00067 void AudioMixer::start2()
00068 {
00069 #ifndef HAVE_SYS_SOUNDCARD_H
00070   LFATAL("I need to have <sys/soundcard.h>");
00071 #else
00072   // open the mixer device
00073   fd = open(DevName.getVal().c_str(), O_RDWR);
00074   if (fd == -1) PLFATAL("Cannot open %s", DevName.getVal().c_str());
00075 
00076   // select the recording input
00077   int mask = 0;
00078   if (InpLine.getVal()) mask |= SOUND_MASK_LINE;
00079   if (InpCD.getVal()) mask |= SOUND_MASK_CD;
00080   if (InpMic.getVal()) mask |= SOUND_MASK_MIC;
00081   if (ioctl(fd, SOUND_MIXER_WRITE_RECSRC, &mask) == -1)
00082     PLERROR("Cannot select recording source");
00083   else
00084     LINFO("Recording sources: Line: %s, CD: %s, Mic: %s",
00085           InpLine.getVal() ? "on" : "off",
00086           InpCD.getVal() ? "on" : "off",
00087           InpMic.getVal() ? "on" : "off");
00088 #endif // HAVE_SYS_SOUNDCARD_H
00089 }
00090 
00091 // ######################################################################
00092 void AudioMixer::stop1()
00093 {
00094   close(fd); fd = -1;
00095 }
00096 
00097 // ######################################################################
00098 AudioMixer::~AudioMixer()
00099 {  }
00100 
00101 // ######################################################################
00102 /* So things look consistent in everyone's emacs... */
00103 /* Local Variables: */
00104 /* indent-tabs-mode: nil */
00105 /* End: */
Generated on Sun May 8 08:40:37 2011 for iLab Neuromorphic Vision Toolkit by  doxygen 1.6.3