1 // Copyright 2013 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 "media/audio/fake_audio_manager.h"
6
7 namespace media {
8
9 namespace {
10
11 const int kDefaultInputBufferSize = 1024;
12 const int kDefaultSampleRate = 48000;
13
14 } // namespace
15
FakeAudioManager(AudioLogFactory * audio_log_factory)16 FakeAudioManager::FakeAudioManager(AudioLogFactory* audio_log_factory)
17 : AudioManagerBase(audio_log_factory) {}
18
~FakeAudioManager()19 FakeAudioManager::~FakeAudioManager() {
20 Shutdown();
21 }
22
23 // Implementation of AudioManager.
HasAudioOutputDevices()24 bool FakeAudioManager::HasAudioOutputDevices() { return false; }
25
HasAudioInputDevices()26 bool FakeAudioManager::HasAudioInputDevices() { return false; }
27
28 // Implementation of AudioManagerBase.
MakeLinearOutputStream(const AudioParameters & params)29 AudioOutputStream* FakeAudioManager::MakeLinearOutputStream(
30 const AudioParameters& params) {
31 return FakeAudioOutputStream::MakeFakeStream(this, params);
32 }
33
MakeLowLatencyOutputStream(const AudioParameters & params,const std::string & device_id,const std::string & input_device_id)34 AudioOutputStream* FakeAudioManager::MakeLowLatencyOutputStream(
35 const AudioParameters& params,
36 const std::string& device_id,
37 const std::string& input_device_id) {
38 return FakeAudioOutputStream::MakeFakeStream(this, params);
39 }
40
MakeLinearInputStream(const AudioParameters & params,const std::string & device_id)41 AudioInputStream* FakeAudioManager::MakeLinearInputStream(
42 const AudioParameters& params,
43 const std::string& device_id) {
44 return FakeAudioInputStream::MakeFakeStream(this, params);
45 }
46
MakeLowLatencyInputStream(const AudioParameters & params,const std::string & device_id)47 AudioInputStream* FakeAudioManager::MakeLowLatencyInputStream(
48 const AudioParameters& params,
49 const std::string& device_id) {
50 return FakeAudioInputStream::MakeFakeStream(this, params);
51 }
52
GetPreferredOutputStreamParameters(const std::string & output_device_id,const AudioParameters & input_params)53 AudioParameters FakeAudioManager::GetPreferredOutputStreamParameters(
54 const std::string& output_device_id,
55 const AudioParameters& input_params) {
56 static const int kDefaultOutputBufferSize = 2048;
57 static const int kDefaultSampleRate = 48000;
58 ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO;
59 int sample_rate = kDefaultSampleRate;
60 int buffer_size = kDefaultOutputBufferSize;
61 int bits_per_sample = 16;
62 int input_channels = 0;
63 if (input_params.IsValid()) {
64 sample_rate = input_params.sample_rate();
65 bits_per_sample = input_params.bits_per_sample();
66 channel_layout = input_params.channel_layout();
67 input_channels = input_params.input_channels();
68 buffer_size = std::min(input_params.frames_per_buffer(), buffer_size);
69 }
70
71 return AudioParameters(
72 AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, input_channels,
73 sample_rate, bits_per_sample, buffer_size, AudioParameters::NO_EFFECTS);
74 }
75
GetInputStreamParameters(const std::string & device_id)76 AudioParameters FakeAudioManager::GetInputStreamParameters(
77 const std::string& device_id) {
78 return AudioParameters(
79 AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
80 kDefaultSampleRate, 16, kDefaultInputBufferSize);
81 }
82
83 } // namespace media
84