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      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_SOUNDSYSTEMPROXY_H_
     12 #define WEBRTC_SOUND_SOUNDSYSTEMPROXY_H_
     13 
     14 #include "webrtc/sound/soundsysteminterface.h"
     15 #include "webrtc/base/basictypes.h"  // for NULL
     16 
     17 namespace rtc {
     18 
     19 // A SoundSystemProxy is a sound system that defers to another one.
     20 // Init(), Terminate(), and GetName() are left as pure virtual, so a sub-class
     21 // must define them.
     22 class SoundSystemProxy : public SoundSystemInterface {
     23  public:
     24   SoundSystemProxy() : wrapped_(NULL) {}
     25 
     26   // Each of these methods simply defers to wrapped_ if non-NULL, else fails.
     27 
     28   virtual bool EnumeratePlaybackDevices(SoundDeviceLocatorList *devices);
     29   virtual bool EnumerateCaptureDevices(SoundDeviceLocatorList *devices);
     30 
     31   virtual bool GetDefaultPlaybackDevice(SoundDeviceLocator **device);
     32   virtual bool GetDefaultCaptureDevice(SoundDeviceLocator **device);
     33 
     34   virtual SoundOutputStreamInterface *OpenPlaybackDevice(
     35       const SoundDeviceLocator *device,
     36       const OpenParams &params);
     37   virtual SoundInputStreamInterface *OpenCaptureDevice(
     38       const SoundDeviceLocator *device,
     39       const OpenParams &params);
     40 
     41  protected:
     42   SoundSystemInterface *wrapped_;
     43 };
     44 
     45 }  // namespace rtc
     46 
     47 #endif  // WEBRTC_SOUND_SOUNDSYSTEMPROXY_H_
     48