e6168f5f41
BUG= R=asapersson@webrtc.org Review URL: https://webrtc-codereview.appspot.com/1717004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4268 4adac7df-926f-26a2-2b94-8c16560cd09d
83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/video_engine/overuse_frame_detector.h"
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#include <cassert>
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#include "webrtc/system_wrappers/interface/clock.h"
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#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
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namespace webrtc {
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// TODO(mflodman) Test different thresholds.
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const int64_t kProcessIntervalMs = 2000;
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const int kOveruseHistoryMs = 5000;
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const float kMinEncodeRatio = 29 / 30.0f;
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OveruseFrameDetector::OveruseFrameDetector(Clock* clock,
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OveruseObserver* observer)
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: crit_(CriticalSectionWrapper::CreateCriticalSection()),
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observer_(observer),
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clock_(clock),
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last_process_time_(clock->TimeInMilliseconds()) {
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assert(observer);
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}
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OveruseFrameDetector::~OveruseFrameDetector() {
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}
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void OveruseFrameDetector::CapturedFrame() {
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CriticalSectionScoped cs(crit_.get());
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CleanOldSamples();
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capture_times_.push_back(clock_->TimeInMilliseconds());
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}
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void OveruseFrameDetector::EncodedFrame() {
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CriticalSectionScoped cs(crit_.get());
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encode_times_.push_back(clock_->TimeInMilliseconds());
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}
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int32_t OveruseFrameDetector::TimeUntilNextProcess() {
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return last_process_time_ + kProcessIntervalMs - clock_->TimeInMilliseconds();
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}
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int32_t OveruseFrameDetector::Process() {
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CriticalSectionScoped cs(crit_.get());
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if (clock_->TimeInMilliseconds() < last_process_time_ + kProcessIntervalMs)
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return 0;
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last_process_time_ = clock_->TimeInMilliseconds();
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CleanOldSamples();
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if (encode_times_.size() == 0 || capture_times_.size() == 0)
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return 0;
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float encode_ratio = encode_times_.size() /
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static_cast<float>(capture_times_.size());
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if (encode_ratio < kMinEncodeRatio) {
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observer_->OveruseDetected();
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}
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return 0;
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}
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void OveruseFrameDetector::CleanOldSamples() {
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int64_t time_now = clock_->TimeInMilliseconds();
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while (capture_times_.size() > 0 &&
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capture_times_.front() < time_now - kOveruseHistoryMs) {
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capture_times_.pop_front();
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}
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while (encode_times_.size() > 0 &&
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encode_times_.front() < time_now - kOveruseHistoryMs) {
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encode_times_.pop_front();
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}
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}
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} // namespace webrtc
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