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| 1 // Copyright 2014 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/browser/media/audio_stream_monitor.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/bind_helpers.h" | |
| 9 #include "content/browser/web_contents/web_contents_impl.h" | |
| 10 #include "content/public/browser/browser_thread.h" | |
| 11 #include "content/public/browser/invalidate_type.h" | |
| 12 #include "content/public/browser/render_frame_host.h" | |
| 13 | |
| 14 namespace content { | |
| 15 | |
| 16 namespace { | |
| 17 | |
| 18 AudioStreamMonitor* AudioStreamMonitorFromRenderFrame(int render_process_id, | |
| 19 int render_frame_id) { | |
| 20 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
| 21 WebContentsImpl* const web_contents = | |
| 22 static_cast<WebContentsImpl*>(WebContents::FromRenderFrameHost( | |
| 23 RenderFrameHost::FromID(render_process_id, render_frame_id))); | |
| 24 return web_contents ? web_contents->audio_stream_monitor() : NULL; | |
| 25 } | |
| 26 | |
| 27 } // namespace | |
| 28 | |
| 29 AudioStreamMonitor::AudioStreamMonitor(WebContents* contents) | |
| 30 : web_contents_(contents), | |
| 31 clock_(&default_tick_clock_), | |
| 32 was_recently_audible_(false) { | |
| 33 DCHECK(web_contents_); | |
| 34 } | |
| 35 | |
| 36 AudioStreamMonitor::~AudioStreamMonitor() {} | |
| 37 | |
| 38 bool AudioStreamMonitor::WasRecentlyAudible() const { | |
| 39 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 40 return was_recently_audible_; | |
| 41 } | |
| 42 | |
| 43 // static | |
| 44 void AudioStreamMonitor::StartMonitoringStream( | |
| 45 int render_process_id, | |
| 46 int render_frame_id, | |
| 47 int stream_id, | |
| 48 const ReadPowerAndClipCallback& read_power_callback) { | |
| 49 if (!monitoring_available()) | |
| 50 return; | |
| 51 BrowserThread::PostTask(BrowserThread::UI, | |
| 52 FROM_HERE, | |
| 53 base::Bind(&StartMonitoringHelper, | |
| 54 render_process_id, | |
| 55 render_frame_id, | |
| 56 stream_id, | |
| 57 read_power_callback)); | |
| 58 } | |
| 59 | |
| 60 // static | |
| 61 void AudioStreamMonitor::StopMonitoringStream(int render_process_id, | |
| 62 int render_frame_id, | |
| 63 int stream_id) { | |
| 64 if (!monitoring_available()) | |
| 65 return; | |
| 66 BrowserThread::PostTask(BrowserThread::UI, | |
| 67 FROM_HERE, | |
| 68 base::Bind(&StopMonitoringHelper, | |
| 69 render_process_id, | |
| 70 render_frame_id, | |
| 71 stream_id)); | |
| 72 } | |
| 73 | |
| 74 // static | |
| 75 void AudioStreamMonitor::StartMonitoringHelper( | |
| 76 int render_process_id, | |
| 77 int render_frame_id, | |
| 78 int stream_id, | |
| 79 const ReadPowerAndClipCallback& read_power_callback) { | |
| 80 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
| 81 AudioStreamMonitor* const monitor = | |
| 82 AudioStreamMonitorFromRenderFrame(render_process_id, render_frame_id); | |
| 83 if (monitor) { | |
| 84 monitor->StartMonitoringStreamOnUIThread( | |
| 85 render_process_id, stream_id, read_power_callback); | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 // static | |
| 90 void AudioStreamMonitor::StopMonitoringHelper(int render_process_id, | |
| 91 int render_frame_id, | |
| 92 int stream_id) { | |
| 93 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
| 94 AudioStreamMonitor* const monitor = | |
| 95 AudioStreamMonitorFromRenderFrame(render_process_id, render_frame_id); | |
| 96 if (monitor) | |
| 97 monitor->StopMonitoringStreamOnUIThread(render_process_id, stream_id); | |
| 98 } | |
| 99 | |
| 100 void AudioStreamMonitor::StartMonitoringStreamOnUIThread( | |
| 101 int render_process_id, | |
| 102 int stream_id, | |
| 103 const ReadPowerAndClipCallback& read_power_callback) { | |
| 104 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 105 DCHECK(!read_power_callback.is_null()); | |
| 106 poll_callbacks_[StreamID(render_process_id, stream_id)] = read_power_callback; | |
| 107 if (!poll_timer_.IsRunning()) { | |
| 108 poll_timer_.Start( | |
| 109 FROM_HERE, | |
| 110 base::TimeDelta::FromSeconds(1) / kPowerMeasurementsPerSecond, | |
| 111 base::Bind(&AudioStreamMonitor::Poll, base::Unretained(this))); | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 void AudioStreamMonitor::StopMonitoringStreamOnUIThread(int render_process_id, | |
| 116 int stream_id) { | |
| 117 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 118 poll_callbacks_.erase(StreamID(render_process_id, stream_id)); | |
| 119 if (poll_callbacks_.empty()) | |
| 120 poll_timer_.Stop(); | |
| 121 } | |
| 122 | |
| 123 void AudioStreamMonitor::Poll() { | |
| 124 for (StreamPollCallbackMap::const_iterator it = poll_callbacks_.begin(); | |
| 125 it != poll_callbacks_.end(); | |
| 126 ++it) { | |
| 127 // TODO(miu): A new UI for delivering specific power level and clipping | |
| 128 // information is still in the works. For now, we throw away all | |
| 129 // information except for "is it audible?" | |
| 130 const float power_dbfs = it->second.Run().first; | |
| 131 const float kSilenceThresholdDBFS = -72.24719896f; | |
| 132 if (power_dbfs >= kSilenceThresholdDBFS) { | |
| 133 last_blurt_time_ = clock_->NowTicks(); | |
| 134 MaybeToggle(); | |
| 135 break; // No need to poll remaining streams. | |
| 136 } | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 void AudioStreamMonitor::MaybeToggle() { | |
| 141 const bool indicator_was_on = was_recently_audible_; | |
| 142 const base::TimeTicks off_time = | |
| 143 last_blurt_time_ + base::TimeDelta::FromMilliseconds(kHoldOnMilliseconds); | |
| 144 const base::TimeTicks now = clock_->NowTicks(); | |
| 145 const bool should_indicator_be_on = now < off_time; | |
| 146 | |
| 147 if (should_indicator_be_on != indicator_was_on) { | |
| 148 was_recently_audible_ = should_indicator_be_on; | |
| 149 web_contents_->NotifyNavigationStateChanged(INVALIDATE_TYPE_TAB); | |
| 150 } | |
| 151 | |
| 152 if (!should_indicator_be_on) { | |
| 153 off_timer_.Stop(); | |
| 154 } else if (!off_timer_.IsRunning()) { | |
| 155 off_timer_.Start( | |
| 156 FROM_HERE, | |
| 157 off_time - now, | |
| 158 base::Bind(&AudioStreamMonitor::MaybeToggle, base::Unretained(this))); | |
| 159 } | |
| 160 } | |
| 161 | |
| 162 } // namespace content | |
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