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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/audio/pulse/audio_manager_pulse.h" | 5 #include "media/audio/pulse/audio_manager_pulse.h" |
6 | 6 |
7 #include "base/command_line.h" | 7 #include "base/command_line.h" |
8 #include "base/environment.h" | 8 #include "base/environment.h" |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "base/nix/xdg_util.h" | 10 #include "base/nix/xdg_util.h" |
11 #include "base/stl_util.h" | 11 #include "base/stl_util.h" |
12 #if defined(USE_ALSA) | 12 #if defined(USE_ALSA) |
13 #include "media/audio/alsa/audio_manager_alsa.h" | 13 #include "media/audio/alsa/audio_manager_alsa.h" |
14 #endif | 14 #endif |
15 #include "media/audio/audio_device_description.h" | 15 #include "media/audio/audio_device_description.h" |
16 #include "media/audio/pulse/pulse_input.h" | 16 #include "media/audio/pulse/pulse_input.h" |
17 #include "media/audio/pulse/pulse_output.h" | 17 #include "media/audio/pulse/pulse_output.h" |
18 #include "media/audio/pulse/pulse_util.h" | 18 #include "media/audio/pulse/pulse_util.h" |
19 #include "media/base/audio_parameters.h" | 19 #include "media/base/audio_parameters.h" |
20 #include "media/base/channel_layout.h" | 20 #include "media/base/channel_layout.h" |
21 #include "media/base/limits.h" | |
22 | 21 |
23 namespace media { | 22 namespace media { |
24 | 23 |
25 using pulse::AutoPulseLock; | 24 using pulse::AutoPulseLock; |
26 using pulse::WaitForOperationCompletion; | 25 using pulse::WaitForOperationCompletion; |
27 | 26 |
28 // Maximum number of output streams that can be open simultaneously. | 27 // Maximum number of output streams that can be open simultaneously. |
29 static const int kMaxOutputStreams = 50; | 28 static const int kMaxOutputStreams = 50; |
30 | 29 |
| 30 // Define bounds for the output buffer size. |
| 31 static const int kMinimumOutputBufferSize = 512; |
| 32 static const int kMaximumOutputBufferSize = 8192; |
| 33 |
31 // Default input buffer size. | 34 // Default input buffer size. |
32 static const int kDefaultInputBufferSize = 1024; | 35 static const int kDefaultInputBufferSize = 1024; |
33 | 36 |
34 AudioManagerPulse::AudioManagerPulse(std::unique_ptr<AudioThread> audio_thread, | 37 AudioManagerPulse::AudioManagerPulse(std::unique_ptr<AudioThread> audio_thread, |
35 AudioLogFactory* audio_log_factory, | 38 AudioLogFactory* audio_log_factory, |
36 pa_threaded_mainloop* pa_mainloop, | 39 pa_threaded_mainloop* pa_mainloop, |
37 pa_context* pa_context) | 40 pa_context* pa_context) |
38 : AudioManagerBase(std::move(audio_thread), audio_log_factory), | 41 : AudioManagerBase(std::move(audio_thread), audio_log_factory), |
39 input_mainloop_(pa_mainloop), | 42 input_mainloop_(pa_mainloop), |
40 input_context_(pa_context), | 43 input_context_(pa_context), |
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154 DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format()); | 157 DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format()); |
155 return MakeInputStream(params, device_id); | 158 return MakeInputStream(params, device_id); |
156 } | 159 } |
157 | 160 |
158 AudioParameters AudioManagerPulse::GetPreferredOutputStreamParameters( | 161 AudioParameters AudioManagerPulse::GetPreferredOutputStreamParameters( |
159 const std::string& output_device_id, | 162 const std::string& output_device_id, |
160 const AudioParameters& input_params) { | 163 const AudioParameters& input_params) { |
161 // TODO(tommi): Support |output_device_id|. | 164 // TODO(tommi): Support |output_device_id|. |
162 VLOG_IF(0, !output_device_id.empty()) << "Not implemented!"; | 165 VLOG_IF(0, !output_device_id.empty()) << "Not implemented!"; |
163 | 166 |
164 int buffer_size = limits::kMinAudioBufferSize; | 167 int buffer_size = kMinimumOutputBufferSize; |
165 int bits_per_sample = 16; | 168 int bits_per_sample = 16; |
166 | 169 |
167 // Query native parameters where applicable; Pulse does not require these to | 170 // Query native parameters where applicable; Pulse does not require these to |
168 // be respected though, so prefer the input parameters for channel count. | 171 // be respected though, so prefer the input parameters for channel count. |
169 UpdateNativeAudioHardwareInfo(); | 172 UpdateNativeAudioHardwareInfo(); |
170 int sample_rate = native_input_sample_rate_; | 173 int sample_rate = native_input_sample_rate_; |
171 ChannelLayout channel_layout = GuessChannelLayout(native_channel_count_); | 174 ChannelLayout channel_layout = GuessChannelLayout(native_channel_count_); |
172 | 175 |
173 if (input_params.IsValid()) { | 176 if (input_params.IsValid()) { |
174 bits_per_sample = input_params.bits_per_sample(); | 177 bits_per_sample = input_params.bits_per_sample(); |
175 channel_layout = input_params.channel_layout(); | 178 channel_layout = input_params.channel_layout(); |
176 buffer_size = | 179 buffer_size = |
177 std::min(static_cast<int>(limits::kMaxAudioBufferSize), | 180 std::min(kMaximumOutputBufferSize, |
178 std::max(buffer_size, input_params.frames_per_buffer())); | 181 std::max(buffer_size, input_params.frames_per_buffer())); |
179 } | 182 } |
180 | 183 |
181 int user_buffer_size = GetUserBufferSize(); | 184 int user_buffer_size = GetUserBufferSize(); |
182 if (user_buffer_size) | 185 if (user_buffer_size) |
183 buffer_size = user_buffer_size; | 186 buffer_size = user_buffer_size; |
184 | 187 |
185 return AudioParameters(AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, | 188 return AudioParameters(AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, |
186 sample_rate, bits_per_sample, buffer_size); | 189 sample_rate, bits_per_sample, buffer_size); |
187 } | 190 } |
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245 const pa_server_info* info, | 248 const pa_server_info* info, |
246 void* user_data) { | 249 void* user_data) { |
247 AudioManagerPulse* manager = reinterpret_cast<AudioManagerPulse*>(user_data); | 250 AudioManagerPulse* manager = reinterpret_cast<AudioManagerPulse*>(user_data); |
248 | 251 |
249 manager->native_input_sample_rate_ = info->sample_spec.rate; | 252 manager->native_input_sample_rate_ = info->sample_spec.rate; |
250 manager->native_channel_count_ = info->sample_spec.channels; | 253 manager->native_channel_count_ = info->sample_spec.channels; |
251 pa_threaded_mainloop_signal(manager->input_mainloop_, 0); | 254 pa_threaded_mainloop_signal(manager->input_mainloop_, 0); |
252 } | 255 } |
253 | 256 |
254 } // namespace media | 257 } // namespace media |
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