Implement Linux audio capturer.

remoting/host/audio_capturer_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/host/audio_capturer_win.h"
 
 #include <windows.h>
 #include <avrt.h>
 #include <mmreg.h>
 #include <mmsystem.h>
@@ skipping 181 matching lines @@
   // Start capturing.
   capture_timer_->Start(FROM_HERE,
                         audio_device_period_,
                         this,
                         &AudioCapturerWin::DoCapture);
   return true;
 }
 
 void AudioCapturerWin::Stop() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(IsRunning());
+  DCHECK(IsStarted());
 
   capture_timer_.reset();
   mm_device_.Release();
   audio_client_.Release();
   audio_capture_client_.Release();
   wave_format_ex_.Reset(NULL);
   com_initializer_.reset();
 
   thread_checker_.DetachFromThread();
 }
 
-bool AudioCapturerWin::IsRunning() {
+bool AudioCapturerWin::IsStarted() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return capture_timer_.get() != NULL;
 }
 
 void AudioCapturerWin::DoCapture() {
   DCHECK(AudioCapturer::IsValidSampleRate(sampling_rate_));
   DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(IsRunning());
+  DCHECK(IsStarted());
 
   // Fetch all packets from the audio capture endpoint buffer.
   while (true) {
     UINT32 next_packet_size;
     HRESULT hr = audio_capture_client_->GetNextPacketSize(&next_packet_size);
     if (FAILED(hr)) {
       LOG(ERROR) << "Failed to GetNextPacketSize. Error " << hr;
       return;
     }
 
@@ skipping 39 matching lines @@
 // static
 bool AudioCapturerWin::IsPacketOfSilence(
     const int16* samples, int number_of_samples) {
   for (int i = 0; i < number_of_samples; i++) {
     if (abs(samples[i]) > kSilenceThreshold)
       return false;
   }
   return true;
 }
 
+bool AudioCapturer::IsSupported() {
+  return true;
+}
+
 scoped_ptr<AudioCapturer> AudioCapturer::Create() {
   return scoped_ptr<AudioCapturer>(new AudioCapturerWin());
 }
 
 }  // namespace remoting