1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_ 6 #define CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_ 7 8 #include "base/basictypes.h" 9 #include "base/memory/ref_counted.h" 10 11 namespace media { 12 class AudioInputDevice; 13 class AudioOutputDevice; 14 } 15 16 namespace content { 17 18 // A factory for creating AudioOutputDevices and AudioInputDevices. There is a 19 // global factory function that can be installed for the purposes of testing to 20 // provide specialized implementations. 21 class AudioDeviceFactory { 22 public: 23 // Creates an AudioOutputDevice using the currently registered factory. 24 // |render_view_id| refers to the render view containing the entity producing 25 // the audio. 26 static scoped_refptr<media::AudioOutputDevice> NewOutputDevice( 27 int render_view_id); 28 29 // Creates an AudioInputDevice using the currently registered factory. 30 // |render_view_id| refers to the render view containing the entity consuming 31 // the audio. 32 static scoped_refptr<media::AudioInputDevice> NewInputDevice( 33 int render_view_id); 34 35 protected: 36 AudioDeviceFactory(); 37 virtual ~AudioDeviceFactory(); 38 39 // You can derive from this class and specify an implementation for these 40 // functions to provide alternate audio device implementations. 41 // If the return value of either of these function is NULL, we fall back 42 // on the default implementation. 43 virtual media::AudioOutputDevice* CreateOutputDevice(int render_view_id) = 0; 44 virtual media::AudioInputDevice* CreateInputDevice(int render_view_id) = 0; 45 46 private: 47 // The current globally registered factory. This is NULL when we should 48 // create the default AudioRendererSinks. 49 static AudioDeviceFactory* factory_; 50 51 DISALLOW_COPY_AND_ASSIGN(AudioDeviceFactory); 52 }; 53 54 } // namespace content 55 56 #endif // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_FACTORY_H_ 57
