rhubarb-lip-sync/lib/webrtc-8d2248ff/webrtc/pc/audiomonitor.cc

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2016-06-21 20:13:05 +00:00
/*
* Copyright 2004 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <assert.h>
#include "webrtc/pc/audiomonitor.h"
#include "webrtc/pc/voicechannel.h"
namespace cricket {
const uint32_t MSG_MONITOR_POLL = 1;
const uint32_t MSG_MONITOR_START = 2;
const uint32_t MSG_MONITOR_STOP = 3;
const uint32_t MSG_MONITOR_SIGNAL = 4;
AudioMonitor::AudioMonitor(VoiceChannel *voice_channel,
rtc::Thread *monitor_thread) {
voice_channel_ = voice_channel;
monitoring_thread_ = monitor_thread;
monitoring_ = false;
}
AudioMonitor::~AudioMonitor() {
voice_channel_->worker_thread()->Clear(this);
monitoring_thread_->Clear(this);
}
void AudioMonitor::Start(int milliseconds) {
rate_ = milliseconds;
if (rate_ < 100)
rate_ = 100;
voice_channel_->worker_thread()->Post(RTC_FROM_HERE, this, MSG_MONITOR_START);
}
void AudioMonitor::Stop() {
voice_channel_->worker_thread()->Post(RTC_FROM_HERE, this, MSG_MONITOR_STOP);
}
void AudioMonitor::OnMessage(rtc::Message *message) {
rtc::CritScope cs(&crit_);
switch (message->message_id) {
case MSG_MONITOR_START:
assert(rtc::Thread::Current() == voice_channel_->worker_thread());
if (!monitoring_) {
monitoring_ = true;
PollVoiceChannel();
}
break;
case MSG_MONITOR_STOP:
assert(rtc::Thread::Current() == voice_channel_->worker_thread());
if (monitoring_) {
monitoring_ = false;
voice_channel_->worker_thread()->Clear(this);
}
break;
case MSG_MONITOR_POLL:
assert(rtc::Thread::Current() == voice_channel_->worker_thread());
PollVoiceChannel();
break;
case MSG_MONITOR_SIGNAL:
{
assert(rtc::Thread::Current() == monitoring_thread_);
AudioInfo info = audio_info_;
crit_.Leave();
SignalUpdate(this, info);
crit_.Enter();
}
break;
}
}
void AudioMonitor::PollVoiceChannel() {
rtc::CritScope cs(&crit_);
assert(rtc::Thread::Current() == voice_channel_->worker_thread());
// Gather connection infos
audio_info_.input_level = voice_channel_->GetInputLevel_w();
audio_info_.output_level = voice_channel_->GetOutputLevel_w();
voice_channel_->GetActiveStreams_w(&audio_info_.active_streams);
// Signal the monitoring thread, start another poll timer
monitoring_thread_->Post(RTC_FROM_HERE, this, MSG_MONITOR_SIGNAL);
voice_channel_->worker_thread()->PostDelayed(RTC_FROM_HERE, rate_, this,
MSG_MONITOR_POLL);
}
VoiceChannel *AudioMonitor::voice_channel() {
return voice_channel_;
}
rtc::Thread *AudioMonitor::monitor_thread() {
return monitoring_thread_;
}
} // namespace cricket