content/renderer/media/audio_device_factory.cc

   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 #include "content/renderer/media/audio_device_factory.h"
   6
   7 #include "base/logging.h"
   8 #include "content/renderer/media/audio_input_message_filter.h"
   9 #include "content/renderer/media/audio_message_filter.h"
  10 #include "media/audio/audio_input_device.h"
  11 #include "media/audio/audio_output_device.h"
  12
  13 namespace content {
  14
  15 // static
  16 AudioDeviceFactory* AudioDeviceFactory::factory_ = NULL;
  17
  18 // static
  19 scoped_refptr<media::AudioOutputDevice> AudioDeviceFactory::NewOutputDevice(
  20     int render_frame_id) {
  21   if (factory_) {
  22     media::AudioOutputDevice* const device =
  23         factory_->CreateOutputDevice(render_frame_id);
  24     if (device)
  25       return device;
  26   }
  27
  28   AudioMessageFilter* const filter = AudioMessageFilter::Get();
  29   return new media::AudioOutputDevice(
  30       filter->CreateAudioOutputIPC(render_frame_id), filter->io_message_loop());
  31 }
  32
  33 // static
  34 scoped_refptr<media::AudioInputDevice> AudioDeviceFactory::NewInputDevice(
  35     int render_frame_id) {
  36   if (factory_) {
  37     media::AudioInputDevice* const device =
  38         factory_->CreateInputDevice(render_frame_id);
  39     if (device)
  40       return device;
  41   }
  42
  43   AudioInputMessageFilter* const filter = AudioInputMessageFilter::Get();
  44   return new media::AudioInputDevice(
  45       filter->CreateAudioInputIPC(render_frame_id), filter->io_message_loop());
  46 }
  47
  48 AudioDeviceFactory::AudioDeviceFactory() {
  49   DCHECK(!factory_) << "Can't register two factories at once.";
  50   factory_ = this;
  51 }
  52
  53 AudioDeviceFactory::~AudioDeviceFactory() {
  54   factory_ = NULL;
  55 }
  56
  57 }  // namespace content