2 * Copyright 2004 The WebRTC Project Authors. All rights reserved.
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.
11 #ifndef WEBRTC_SOUND_NULLSOUNDSYSTEM_H_
12 #define WEBRTC_SOUND_NULLSOUNDSYSTEM_H_
14 #include "webrtc/sound/soundsysteminterface.h"
18 class SoundDeviceLocator;
19 class SoundInputStreamInterface;
20 class SoundOutputStreamInterface;
22 // A simple reference sound system that drops output samples and generates
24 class NullSoundSystem : public SoundSystemInterface {
26 static SoundSystemInterface *Create() {
27 return new NullSoundSystem();
30 virtual ~NullSoundSystem();
33 virtual void Terminate();
35 virtual bool EnumeratePlaybackDevices(SoundDeviceLocatorList *devices);
36 virtual bool EnumerateCaptureDevices(SoundDeviceLocatorList *devices);
38 virtual SoundOutputStreamInterface *OpenPlaybackDevice(
39 const SoundDeviceLocator *device,
40 const OpenParams ¶ms);
41 virtual SoundInputStreamInterface *OpenCaptureDevice(
42 const SoundDeviceLocator *device,
43 const OpenParams ¶ms);
45 virtual bool GetDefaultPlaybackDevice(SoundDeviceLocator **device);
46 virtual bool GetDefaultCaptureDevice(SoundDeviceLocator **device);
48 virtual const char *GetName() const;
53 #endif // WEBRTC_SOUND_NULLSOUNDSYSTEM_H_