59 lines
2.5 KiB
C
59 lines
2.5 KiB
C
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/*
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* libjingle
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* Copyright 2004--2010, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_SOUND_LINUXSOUNDSYSTEM_H_
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#define TALK_SOUND_LINUXSOUNDSYSTEM_H_
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#include "talk/sound/automaticallychosensoundsystem.h"
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namespace cricket {
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extern const SoundSystemCreator kLinuxSoundSystemCreators[
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#ifdef HAVE_LIBPULSE
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2
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#else
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1
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#endif
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];
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// The vast majority of Linux systems use ALSA for the device-level sound API,
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// but an increasing number are using PulseAudio for the application API and
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// only using ALSA internally in PulseAudio itself. But like everything on
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// Linux this is user-configurable, so we need to support both and choose the
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// right one at run-time.
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// PulseAudioSoundSystem is designed to only successfully initialize if
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// PulseAudio is installed and running, and if it is running then direct device
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// access using ALSA typically won't work, so if PulseAudioSoundSystem
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// initializes then we choose that. Otherwise we choose ALSA.
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typedef AutomaticallyChosenSoundSystem<
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kLinuxSoundSystemCreators,
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ARRAY_SIZE(kLinuxSoundSystemCreators)> LinuxSoundSystem;
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} // namespace cricket
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#endif // TALK_SOUND_LINUXSOUNDSYSTEM_H_
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