/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 3 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// Copyright (c) 1996-2017 Live Networks, Inc. All rights reserved.
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// Generic audio input device (such as a microphone, or an input sound card)
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// C++ header
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#ifndef _AUDIO_INPUT_DEVICE_HH
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#define _AUDIO_INPUT_DEVICE_HH
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#ifndef _FRAMED_SOURCE_HH
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#include "FramedSource.hh"
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#endif
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class AudioPortNames {
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public:
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AudioPortNames();
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virtual ~AudioPortNames();
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unsigned numPorts;
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char** portName;
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};
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class AudioInputDevice: public FramedSource {
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public:
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unsigned char bitsPerSample() const { return fBitsPerSample; }
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unsigned char numChannels() const { return fNumChannels; }
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unsigned samplingFrequency() const { return fSamplingFrequency; }
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virtual Boolean setInputPort(int portIndex) = 0;
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virtual double getAverageLevel() const = 0;
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static AudioInputDevice*
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createNew(UsageEnvironment& env, int inputPortNumber,
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unsigned char bitsPerSample, unsigned char numChannels,
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unsigned samplingFrequency, unsigned granularityInMS = 20);
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static AudioPortNames* getPortNames();
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static char** allowedDeviceNames;
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// If this is set to non-NULL, then it's a NULL-terminated array of strings
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// of device names that we are allowed to access.
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protected:
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AudioInputDevice(UsageEnvironment& env,
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unsigned char bitsPerSample,
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unsigned char numChannels,
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unsigned samplingFrequency,
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unsigned granularityInMS);
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// we're an abstract base class
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virtual ~AudioInputDevice();
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protected:
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unsigned char fBitsPerSample, fNumChannels;
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unsigned fSamplingFrequency;
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unsigned fGranularityInMS;
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};
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#endif
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