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
13namespace base {
14class FilePath;
15}
16
17namespace remoting {
18
19// Linux implementation of AudioCapturer interface which captures audio by
20// reading samples from a Pulseaudio "pipe" sink.
21class 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_
55