1 /* 2 * libjingle 3 * Copyright 2004--2010, Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_SOUND_LINUXSOUNDSYSTEM_H_ 29 #define TALK_SOUND_LINUXSOUNDSYSTEM_H_ 30 31 #include "talk/sound/automaticallychosensoundsystem.h" 32 33 namespace cricket { 34 35 extern const SoundSystemCreator kLinuxSoundSystemCreators[ 36 #ifdef HAVE_LIBPULSE 37 2 38 #else 39 1 40 #endif 41 ]; 42 43 // The vast majority of Linux systems use ALSA for the device-level sound API, 44 // but an increasing number are using PulseAudio for the application API and 45 // only using ALSA internally in PulseAudio itself. But like everything on 46 // Linux this is user-configurable, so we need to support both and choose the 47 // right one at run-time. 48 // PulseAudioSoundSystem is designed to only successfully initialize if 49 // PulseAudio is installed and running, and if it is running then direct device 50 // access using ALSA typically won't work, so if PulseAudioSoundSystem 51 // initializes then we choose that. Otherwise we choose ALSA. 52 typedef AutomaticallyChosenSoundSystem< 53 kLinuxSoundSystemCreators, 54 ARRAY_SIZE(kLinuxSoundSystemCreators)> LinuxSoundSystem; 55 56 } // namespace cricket 57 58 #endif // TALK_SOUND_LINUXSOUNDSYSTEM_H_ 59
