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)34 AudioOutputStream* FakeAudioManager::MakeLowLatencyOutputStream(
35 const AudioParameters& params,
36 const std::string& device_id) {
37 return FakeAudioOutputStream::MakeFakeStream(this, params);
38 }
39
MakeLinearInputStream(const AudioParameters & params,const std::string & device_id)40 AudioInputStream* FakeAudioManager::MakeLinearInputStream(
41 const AudioParameters& params,
42 const std::string& device_id) {
43 return FakeAudioInputStream::MakeFakeStream(this, params);
44 }
45
MakeLowLatencyInputStream(const AudioParameters & params,const std::string & device_id)46 AudioInputStream* FakeAudioManager::MakeLowLatencyInputStream(
47 const AudioParameters& params,
48 const std::string& device_id) {
49 return FakeAudioInputStream::MakeFakeStream(this, params);
50 }
51
GetPreferredOutputStreamParameters(const std::string & output_device_id,const AudioParameters & input_params)52 AudioParameters FakeAudioManager::GetPreferredOutputStreamParameters(
53 const std::string& output_device_id,
54 const AudioParameters& input_params) {
55 static const int kDefaultOutputBufferSize = 2048;
56 static const int kDefaultSampleRate = 48000;
57 ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO;
58 int sample_rate = kDefaultSampleRate;
59 int buffer_size = kDefaultOutputBufferSize;
60 int bits_per_sample = 16;
61 int input_channels = 0;
62 if (input_params.IsValid()) {
63 sample_rate = input_params.sample_rate();
64 bits_per_sample = input_params.bits_per_sample();
65 channel_layout = input_params.channel_layout();
66 input_channels = input_params.input_channels();
67 buffer_size = std::min(input_params.frames_per_buffer(), buffer_size);
68 }
69
70 return AudioParameters(
71 AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, input_channels,
72 sample_rate, bits_per_sample, buffer_size, AudioParameters::NO_EFFECTS);
73 }
74
GetInputStreamParameters(const std::string & device_id)75 AudioParameters FakeAudioManager::GetInputStreamParameters(
76 const std::string& device_id) {
77 return AudioParameters(
78 AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
79 kDefaultSampleRate, 16, kDefaultInputBufferSize);
80 }
81
82 } // namespace media
83