remoting/host/audio_capturer_linux.h

   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 REMOTING_HOST_AUDIO_CAPTURER_LINUX_H_
   6 #define REMOTING_HOST_AUDIO_CAPTURER_LINUX_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "remoting/host/audio_capturer.h"
  10 #include "remoting/host/audio_silence_detector.h"
  11 #include "remoting/host/linux/audio_pipe_reader.h"
  12
  13 namespace base {
  14 class FilePath;
  15 }
  16
  17 namespace remoting {
  18
  19 // Linux implementation of AudioCapturer interface which captures audio by
  20 // reading samples from a Pulseaudio "pipe" sink.
  21 class AudioCapturerLinux : public AudioCapturer,
  22                            public AudioPipeReader::StreamObserver {
  23  public:
  24   // Must be called to configure the capturer before the first capturer instance
  25   // is created. |task_runner| is an IO thread that is passed to AudioPipeReader
  26   // to read from the pipe.
  27   static void InitializePipeReader(
  28       scoped_refptr<base::SingleThreadTaskRunner> task_runner,
  29       const base::FilePath& pipe_name);
  30
  31   explicit AudioCapturerLinux(
  32       scoped_refptr<AudioPipeReader> pipe_reader);
  33   virtual ~AudioCapturerLinux();
  34
  35   // AudioCapturer interface.
  36   virtual bool Start(const PacketCapturedCallback& callback) OVERRIDE;
  37   virtual void Stop() OVERRIDE;
  38   virtual bool IsStarted() OVERRIDE;
  39
  40   // AudioPipeReader::StreamObserver interface.
  41   virtual void OnDataRead(scoped_refptr<base::RefCountedString> data) OVERRIDE;
  42
  43  private:
  44   scoped_refptr<AudioPipeReader> pipe_reader_;
  45   PacketCapturedCallback callback_;
  46
  47   AudioSilenceDetector silence_detector_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(AudioCapturerLinux);
  50 };
  51
  52 }  // namespace remoting
  53
  54 #endif  // REMOTING_HOST_AUDIO_CAPTURER_LINUX_H_