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.
5 #include "media/audio/openbsd/audio_manager_openbsd.h"
9 #include "base/command_line.h"
10 #include "base/file_path.h"
11 #include "base/stl_util.h"
12 #include "media/audio/audio_output_dispatcher.h"
13 #include "media/audio/audio_parameters.h"
14 #include "media/audio/pulse/pulse_output.h"
15 #include "media/audio/pulse/pulse_stubs.h"
16 #include "media/base/channel_layout.h"
17 #include "media/base/limits.h"
18 #include "media/base/media_switches.h"
20 using media_audio_pulse::kModulePulse;
21 using media_audio_pulse::InitializeStubs;
22 using media_audio_pulse::StubPathMap;
26 // Maximum number of output streams that can be open simultaneously.
27 static const int kMaxOutputStreams = 50;
29 // Default sample rate for input and output streams.
30 static const int kDefaultSampleRate = 48000;
32 static const base::FilePath::CharType kPulseLib[] =
33 FILE_PATH_LITERAL("libpulse.so.0");
35 // Implementation of AudioManager.
36 static bool HasAudioHardware() {
40 if ((file = getenv("AUDIOCTLDEVICE")) == 0 || *file == '\0')
41 file = "/dev/audioctl";
43 if ((fd = open(file, O_RDONLY)) < 0)
50 bool AudioManagerOpenBSD::HasAudioOutputDevices() {
51 return HasAudioHardware();
54 bool AudioManagerOpenBSD::HasAudioInputDevices() {
55 return HasAudioHardware();
58 AudioParameters AudioManagerOpenBSD::GetInputStreamParameters(
59 const std::string& device_id) {
60 static const int kDefaultInputBufferSize = 1024;
62 return AudioParameters(
63 AudioParameters::AUDIO_PCM_LOW_LATENCY, CHANNEL_LAYOUT_STEREO,
64 kDefaultSampleRate, 16, kDefaultInputBufferSize);
67 AudioManagerOpenBSD::AudioManagerOpenBSD()
68 : pulse_library_is_initialized_(false) {
69 SetMaxOutputStreamsAllowed(kMaxOutputStreams);
72 // Check if the pulse library is avialbale.
73 paths[kModulePulse].push_back(kPulseLib);
74 if (!InitializeStubs(paths)) {
75 DLOG(WARNING) << "Failed on loading the Pulse library and symbols";
79 pulse_library_is_initialized_ = true;
82 AudioManagerOpenBSD::~AudioManagerOpenBSD() {
86 AudioOutputStream* AudioManagerOpenBSD::MakeLinearOutputStream(
87 const AudioParameters& params) {
88 DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format);
89 return MakeOutputStream(params);
92 AudioOutputStream* AudioManagerOpenBSD::MakeLowLatencyOutputStream(
93 const AudioParameters& params,
94 const std::string& device_id,
95 const std::string& input_device_id) {
96 DLOG_IF(ERROR, !device_id.empty()) << "Not implemented!";
97 DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
98 return MakeOutputStream(params);
101 AudioInputStream* AudioManagerOpenBSD::MakeLinearInputStream(
102 const AudioParameters& params, const std::string& device_id) {
103 DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format);
108 AudioInputStream* AudioManagerOpenBSD::MakeLowLatencyInputStream(
109 const AudioParameters& params, const std::string& device_id) {
110 DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
115 AudioParameters AudioManagerOpenBSD::GetPreferredOutputStreamParameters(
116 const std::string& output_device_id,
117 const AudioParameters& input_params) {
118 // TODO(tommi): Support |output_device_id|.
119 DLOG_IF(ERROR, !output_device_id.empty()) << "Not implemented!";
120 static const int kDefaultOutputBufferSize = 512;
122 ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO;
123 int sample_rate = kDefaultSampleRate;
124 int buffer_size = kDefaultOutputBufferSize;
125 int bits_per_sample = 16;
126 int input_channels = 0;
127 if (input_params.IsValid()) {
128 sample_rate = input_params.sample_rate();
129 bits_per_sample = input_params.bits_per_sample();
130 channel_layout = input_params.channel_layout();
131 input_channels = input_params.input_channels();
132 buffer_size = std::min(buffer_size, input_params.frames_per_buffer());
135 int user_buffer_size = GetUserBufferSize();
136 if (user_buffer_size)
137 buffer_size = user_buffer_size;
139 return AudioParameters(
140 AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, input_channels,
141 sample_rate, bits_per_sample, buffer_size);
144 AudioOutputStream* AudioManagerOpenBSD::MakeOutputStream(
145 const AudioParameters& params) {
146 if (pulse_library_is_initialized_)
147 return new PulseAudioOutputStream(params, this);
152 // TODO(xians): Merge AudioManagerOpenBSD with AudioManagerPulse;
154 AudioManager* CreateAudioManager() {
155 return new AudioManagerOpenBSD();