1/* 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#ifndef WEBRTC_SOUND_LINUXSOUNDSYSTEM_H_ 12#define WEBRTC_SOUND_LINUXSOUNDSYSTEM_H_ 13 14#include "webrtc/sound/automaticallychosensoundsystem.h" 15 16namespace rtc { 17 18extern const SoundSystemCreator kLinuxSoundSystemCreators[ 19#ifdef HAVE_LIBPULSE 20 2 21#else 22 1 23#endif 24 ]; 25 26// The vast majority of Linux systems use ALSA for the device-level sound API, 27// but an increasing number are using PulseAudio for the application API and 28// only using ALSA internally in PulseAudio itself. But like everything on 29// Linux this is user-configurable, so we need to support both and choose the 30// right one at run-time. 31// PulseAudioSoundSystem is designed to only successfully initialize if 32// PulseAudio is installed and running, and if it is running then direct device 33// access using ALSA typically won't work, so if PulseAudioSoundSystem 34// initializes then we choose that. Otherwise we choose ALSA. 35typedef AutomaticallyChosenSoundSystem< 36 kLinuxSoundSystemCreators, 37 ARRAY_SIZE(kLinuxSoundSystemCreators)> LinuxSoundSystem; 38 39} // namespace rtc 40 41#endif // WEBRTC_SOUND_LINUXSOUNDSYSTEM_H_ 42