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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 "content/renderer/media/webrtc_audio_processor.h" | |
6 | |
7 #include "base/command_line.h" | |
tommi (sloooow) - chröme
2013/11/22 14:32:42
you probably don't need this
no longer working on chromium
2013/11/25 16:36:26
This will stay
| |
8 #include "base/debug/trace_event.h" | |
9 #include "content/public/common/content_switches.h" | |
tommi (sloooow) - chröme
2013/11/22 14:32:42
or this
no longer working on chromium
2013/11/25 16:36:26
ditto
| |
10 #include "content/renderer/media/webrtc_audio_processor_options.h" | |
11 #include "media/audio/audio_parameters.h" | |
12 #include "media/base/audio_converter.h" | |
13 #include "media/base/audio_fifo.h" | |
14 #include "media/base/channel_layout.h" | |
15 | |
16 namespace content { | |
17 | |
18 namespace { | |
19 | |
20 using webrtc::AudioProcessing; | |
21 using webrtc::MediaConstraintsInterface; | |
22 | |
23 #if defined(ANDROID) | |
24 const int kAudioProcessingSampleRate = 16000; | |
25 #else | |
26 const int kAudioProcessingSampleRate = 32000; | |
27 #endif | |
28 const int kAudioProcessingNumberOfChannel = 1; | |
29 | |
30 const int kMaxNumberOfBuffersInFifo = 2; | |
31 | |
32 } // namespace | |
33 | |
34 class WebRtcAudioProcessor::WebRtcAudioConverter | |
35 : public media::AudioConverter::InputCallback { | |
36 public: | |
37 WebRtcAudioConverter(const media::AudioParameters& source_params, | |
38 const media::AudioParameters& sink_params) | |
39 : source_params_(source_params), | |
40 sink_params_(sink_params), | |
41 audio_converter_(source_params, sink_params_, false) { | |
42 audio_converter_.AddInput(this); | |
43 // Create and initialize audio fifo and audio bus wrapper. | |
44 // The size of the FIFO should be at least twice of the source buffer size | |
45 // or twice of the sink buffer size. | |
46 int buffer_size = std::max( | |
47 kMaxNumberOfBuffersInFifo * source_params_.frames_per_buffer(), | |
48 kMaxNumberOfBuffersInFifo * sink_params_.frames_per_buffer()); | |
49 fifo_.reset(new media::AudioFifo(source_params_.channels(), buffer_size)); | |
50 // TODO(xians): Use CreateWrapper to save one memcpy. | |
51 audio_wrapper_ = media::AudioBus::Create(sink_params_.channels(), | |
52 sink_params_.frames_per_buffer()); | |
53 } | |
54 | |
55 virtual ~WebRtcAudioConverter() { | |
56 DCHECK(thread_checker_.CalledOnValidThread()); | |
57 audio_converter_.RemoveInput(this); | |
58 } | |
59 | |
60 void Push(media::AudioBus* audio_source) { | |
61 // Called on the audio thread, which is the capture audio thread for | |
62 // |WebRtcAudioProcessor::capture_converter_|, and render audio thread for | |
63 // |WebRtcAudioProcessor::render_converter_|. | |
64 // And it must be the same thread as calling Convert(). | |
65 DCHECK(thread_checker_.CalledOnValidThread()); | |
66 fifo_->Push(audio_source); | |
67 } | |
68 | |
69 bool Convert(webrtc::AudioFrame* out) { | |
70 // Called on the audio thread, which is the capture audio thread for | |
71 // |WebRtcAudioProcessor::capture_converter_|, and render audio thread for | |
72 // |WebRtcAudioProcessor::render_converter_|. | |
73 // Return false if there is no 10ms data in the FIFO. | |
74 DCHECK(thread_checker_.CalledOnValidThread()); | |
75 if (fifo_->frames() < (source_params_.sample_rate() / 100)) | |
76 return false; | |
77 | |
78 // Convert 10ms data to the output format, this will trigger ProvideInput(). | |
79 audio_converter_.Convert(audio_wrapper_.get()); | |
80 | |
81 // TODO(xians): Figure out a better way to handle the interleaved and | |
82 // deinterleaved format switching. | |
83 audio_wrapper_->ToInterleaved(audio_wrapper_->frames(), | |
84 sink_params_.bits_per_sample() / 8, | |
85 out->data_); | |
86 | |
87 out->samples_per_channel_ = sink_params_.frames_per_buffer(); | |
88 out->sample_rate_hz_ = sink_params_.sample_rate(); | |
89 out->speech_type_ = webrtc::AudioFrame::kNormalSpeech; | |
90 out->vad_activity_ = webrtc::AudioFrame::kVadUnknown; | |
91 out->num_channels_ = sink_params_.channels(); | |
92 | |
93 return true; | |
94 } | |
95 | |
96 const media::AudioParameters& source_parameters() const { | |
97 return source_params_; | |
98 } | |
99 const media::AudioParameters& sink_parameters() const { | |
100 return sink_params_; | |
101 } | |
102 | |
103 private: | |
104 // AudioConverter::InputCallback implementation. | |
105 virtual double ProvideInput(media::AudioBus* audio_bus, | |
106 base::TimeDelta buffer_delay) OVERRIDE { | |
107 // Called on realtime audio thread. | |
108 // TODO(xians): Figure out why the first Convert() triggers ProvideInput | |
109 // two times. | |
110 if (fifo_->frames() < audio_bus->frames()) | |
111 return 0; | |
112 | |
113 fifo_->Consume(audio_bus, 0, audio_bus->frames()); | |
114 | |
115 // Return 1.0 to indicate no volume scaling on the data. | |
116 return 1.0; | |
117 } | |
118 | |
119 base::ThreadChecker thread_checker_; | |
120 const media::AudioParameters source_params_; | |
121 const media::AudioParameters sink_params_; | |
122 | |
123 // TODO(xians): consider using SincResampler to save some memcpy. | |
124 // Handles mixing and resampling between input and output parameters. | |
125 media::AudioConverter audio_converter_; | |
126 scoped_ptr<media::AudioBus> audio_wrapper_; | |
127 scoped_ptr<media::AudioFifo> fifo_; | |
128 }; | |
129 | |
130 WebRtcAudioProcessor::WebRtcAudioProcessor( | |
131 const webrtc::MediaConstraintsInterface* constraints) | |
132 : render_delay_ms_(0) { | |
133 capture_thread_checker_.DetachFromThread(); | |
134 render_thread_checker_.DetachFromThread(); | |
135 InitializeAudioProcessingModule(constraints); | |
136 } | |
137 | |
138 WebRtcAudioProcessor::~WebRtcAudioProcessor() { | |
139 DCHECK(main_thread_checker_.CalledOnValidThread()); | |
140 StopAudioProcessing(); | |
141 } | |
142 | |
143 void WebRtcAudioProcessor::PushCaptureData(media::AudioBus* audio_source) { | |
144 DCHECK(capture_thread_checker_.CalledOnValidThread()); | |
145 capture_converter_->Push(audio_source); | |
146 } | |
147 | |
148 void WebRtcAudioProcessor::PushRenderData( | |
149 const int16* render_audio, int sample_rate, int number_of_channels, | |
150 int number_of_frames, base::TimeDelta render_delay) { | |
151 DCHECK(render_thread_checker_.CalledOnValidThread()); | |
152 | |
153 // Return immediately if the echo cancellation is off. | |
154 if (!audio_processing_ || | |
155 !audio_processing_->echo_cancellation()->is_enabled()) { | |
156 return; | |
157 } | |
158 | |
159 TRACE_EVENT0("audio", | |
160 "WebRtcAudioProcessor::FeedRenderDataToAudioProcessing"); | |
161 int64 new_render_delay_ms = render_delay.InMilliseconds(); | |
162 DCHECK_LT(new_render_delay_ms, | |
163 std::numeric_limits<base::subtle::Atomic32>::max()); | |
164 base::subtle::Release_Store(&render_delay_ms_, new_render_delay_ms); | |
165 | |
166 InitializeRenderConverterIfNeeded(sample_rate, number_of_channels, | |
167 number_of_frames); | |
168 | |
169 // TODO(xians): Avoid this extra interleave/deinterleave. | |
170 render_data_bus_->FromInterleaved(render_audio, | |
171 render_data_bus_->frames(), | |
172 sizeof(render_audio[0])); | |
173 render_converter_->Push(render_data_bus_.get()); | |
174 while (render_converter_->Convert(&render_frame_)) | |
175 audio_processing_->AnalyzeReverseStream(&render_frame_); | |
176 } | |
177 | |
178 bool WebRtcAudioProcessor::ProcessAndConsumeData( | |
179 base::TimeDelta capture_delay, int volume, bool key_pressed, | |
180 int16** out) { | |
181 DCHECK(capture_thread_checker_.CalledOnValidThread()); | |
182 TRACE_EVENT0("audio", | |
183 "WebRtcAudioProcessor::ProcessAndConsumeData"); | |
184 | |
185 if (!capture_converter_->Convert(&capture_frame_)) | |
186 return false; | |
187 | |
188 ProcessData(&capture_frame_, capture_delay, volume, key_pressed); | |
189 *out = capture_frame_.data_; | |
190 | |
191 return true; | |
192 } | |
193 | |
194 void WebRtcAudioProcessor::SetCaptureFormat( | |
195 const media::AudioParameters& source_params) { | |
196 DCHECK(capture_thread_checker_.CalledOnValidThread()); | |
197 DCHECK(source_params.IsValid()); | |
198 | |
199 // Create and initialize audio converter for the source data. | |
200 // When the webrtc AudioProcessing is enabled, the sink format of the | |
201 // converter will be the same as the post-processed data format, which is | |
202 // 32k mono for desktops and 16k mono for Android. When the AudioProcessing | |
203 // is disabled, the sink format will be the same as the source format. | |
204 const int sink_sample_rate = audio_processing_ ? | |
205 kAudioProcessingSampleRate : source_params.sample_rate(); | |
206 const media::ChannelLayout sink_channel_layout = audio_processing_ ? | |
207 media::CHANNEL_LAYOUT_MONO : source_params.channel_layout(); | |
208 | |
209 // WebRtc is using 10ms data as its native packet size. | |
210 media::AudioParameters sink_params( | |
211 media::AudioParameters::AUDIO_PCM_LOW_LATENCY, sink_channel_layout, | |
212 sink_sample_rate, 16, sink_sample_rate / 100); | |
213 capture_converter_.reset( | |
214 new WebRtcAudioConverter(source_params, sink_params)); | |
215 } | |
216 | |
217 const media::AudioParameters& WebRtcAudioProcessor::OutputFormat() const { | |
218 return capture_converter_->sink_parameters(); | |
219 } | |
220 | |
221 void WebRtcAudioProcessor::InitializeAudioProcessingModule( | |
222 const webrtc::MediaConstraintsInterface* constraints) { | |
223 DCHECK(!audio_processing_); | |
224 if (!CommandLine::ForCurrentProcess()->HasSwitch( | |
tommi (sloooow) - chröme
2013/11/22 14:32:42
I don't think this is the right place to do this c
Henrik Grunell
2013/11/25 10:52:02
+1
no longer working on chromium
2013/11/25 16:36:26
The comment was addressed offline.
| |
225 switches::kEnableAudioTrackProcessing)) { | |
226 return; | |
227 } | |
228 | |
229 // Some unittests do not have the constraints defined. | |
230 if (!constraints) | |
231 return; | |
232 | |
233 const bool enable_aec = GetPropertyFromConstraints( | |
234 constraints, MediaConstraintsInterface::kEchoCancellation); | |
235 const bool enable_ns = GetPropertyFromConstraints( | |
236 constraints, MediaConstraintsInterface::kNoiseSuppression); | |
237 const bool enable_high_pass_filter = GetPropertyFromConstraints( | |
238 constraints, MediaConstraintsInterface::kHighpassFilter); | |
239 const bool start_aec_dump = GetPropertyFromConstraints( | |
240 constraints, MediaConstraintsInterface::kInternalAecDump); | |
241 #if defined(IOS) || defined(ANDROID) | |
242 const bool enable_experimental_aec = false; | |
243 const bool enable_typing_detection = false; | |
244 #else | |
245 const bool enable_experimental_aec = GetPropertyFromConstraints( | |
246 constraints, MediaConstraintsInterface::kExperimentalEchoCancellation); | |
247 const bool enable_typing_detection = GetPropertyFromConstraints( | |
248 constraints, MediaConstraintsInterface::kTypingNoiseDetection); | |
249 #endif | |
250 | |
251 // Return immediately if no audio processing component is enabled. | |
252 if (!enable_aec && !enable_experimental_aec && !enable_ns && | |
253 !enable_high_pass_filter && !enable_typing_detection) { | |
254 return; | |
255 } | |
256 | |
257 // Create and configure the webrtc::AudioProcessing. | |
258 audio_processing_.reset(webrtc::AudioProcessing::Create(0)); | |
259 | |
260 // Enable the audio processing components. | |
261 if (enable_aec) { | |
262 EnableEchoCancellation(audio_processing_.get()); | |
263 if (enable_experimental_aec) | |
264 EnableExperimentalEchoCancellation(audio_processing_.get()); | |
265 } | |
266 | |
267 if (enable_ns) | |
268 EnableNoiseSuppression(audio_processing_.get()); | |
269 | |
270 if (enable_high_pass_filter) | |
271 EnableHighPassFilter(audio_processing_.get()); | |
272 | |
273 if (enable_typing_detection) | |
274 EnableTypingDetection(audio_processing_.get()); | |
275 | |
276 if (enable_aec && start_aec_dump) | |
277 StartAecDump(audio_processing_.get()); | |
278 | |
279 // Configure the audio format the audio processing is running on. This | |
280 // has to be done after all the needed components are enabled. | |
281 CHECK_EQ(audio_processing_->set_sample_rate_hz(kAudioProcessingSampleRate), | |
282 0); | |
283 CHECK_EQ(audio_processing_->set_num_channels(kAudioProcessingNumberOfChannel, | |
284 kAudioProcessingNumberOfChannel), | |
285 0); | |
286 } | |
287 | |
288 void WebRtcAudioProcessor::InitializeRenderConverterIfNeeded( | |
289 int sample_rate, int number_of_channels, int frames_per_buffer) { | |
290 DCHECK(render_thread_checker_.CalledOnValidThread()); | |
291 // TODO(xians): Figure out if we need to handle the buffer size change. | |
292 if (render_converter_.get() && | |
293 render_converter_->source_parameters().sample_rate() == sample_rate && | |
294 render_converter_->source_parameters().channels() == number_of_channels) { | |
295 // Do nothing if the |render_converter_| has been setup properly. | |
296 return; | |
297 } | |
298 | |
299 // Create and initialize audio converter for the render data. | |
300 // webrtc::AudioProcessing accepts the same format as what it uses to process | |
301 // capture data, which is 32k mono for desktops and 16k mono for Android. | |
302 media::AudioParameters source_params( | |
303 media::AudioParameters::AUDIO_PCM_LOW_LATENCY, | |
304 media::GuessChannelLayout(number_of_channels), sample_rate, 16, | |
305 frames_per_buffer); | |
306 media::AudioParameters sink_params( | |
307 media::AudioParameters::AUDIO_PCM_LOW_LATENCY, | |
308 media::CHANNEL_LAYOUT_MONO, kAudioProcessingSampleRate, 16, | |
309 kAudioProcessingSampleRate / 100); | |
310 render_converter_.reset(new WebRtcAudioConverter(source_params, sink_params)); | |
311 render_data_bus_ = media::AudioBus::Create(number_of_channels, | |
312 frames_per_buffer); | |
313 } | |
314 | |
315 void WebRtcAudioProcessor::ProcessData(webrtc::AudioFrame* audio_frame, | |
316 base::TimeDelta capture_delay, | |
317 int volume, | |
318 bool key_pressed) { | |
319 DCHECK(capture_thread_checker_.CalledOnValidThread()); | |
320 if (!audio_processing_) | |
321 return; | |
322 | |
323 TRACE_EVENT0("audio", "WebRtcAudioProcessor::Process10MsData"); | |
324 DCHECK_EQ(audio_processing_->sample_rate_hz(), | |
325 capture_converter_->sink_parameters().sample_rate()); | |
326 DCHECK_EQ(audio_processing_->num_input_channels(), | |
327 capture_converter_->sink_parameters().channels()); | |
328 DCHECK_EQ(audio_processing_->num_output_channels(), | |
329 capture_converter_->sink_parameters().channels()); | |
330 | |
331 base::subtle::Atomic32 render_delay_ms = | |
332 base::subtle::Acquire_Load(&render_delay_ms_); | |
333 int64 capture_delay_ms = capture_delay.InMilliseconds(); | |
334 DCHECK_LT(capture_delay_ms, | |
335 std::numeric_limits<base::subtle::Atomic32>::max()); | |
336 int total_delay_ms = capture_delay_ms + render_delay_ms; | |
337 if (total_delay_ms > 1000) { | |
338 LOG(WARNING) << "Large audio delay, capture delay: " << capture_delay_ms | |
339 << "ms; render delay: " << render_delay_ms << "ms"; | |
340 } | |
341 | |
342 audio_processing_->set_stream_delay_ms(total_delay_ms); | |
343 webrtc::GainControl* agc = audio_processing_->gain_control(); | |
344 int err = agc->set_stream_analog_level(volume); | |
345 DCHECK_EQ(err, 0) << "set_stream_analog_level() error: " << err; | |
346 err = audio_processing_->ProcessStream(audio_frame); | |
347 DCHECK_EQ(err, 0) << "ProcessStream() error: " << err; | |
348 | |
349 // TODO(xians): Add support for AGC, typing detection, audio level | |
350 // calculation, stereo swapping. | |
351 } | |
352 | |
353 void WebRtcAudioProcessor::StopAudioProcessing() { | |
354 if (!audio_processing_.get()) | |
355 return; | |
356 | |
357 // It is safe to stop the AEC dump even it is not started. | |
358 StopAecDump(audio_processing_.get()); | |
359 | |
360 audio_processing_.reset(); | |
361 } | |
362 | |
363 } // namespace content | |
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