tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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video_timing.cc (3798B)

      1 /*
      2 *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
      3 *
      4 *  Use of this source code is governed by a BSD-style license
      5 *  that can be found in the LICENSE file in the root of the source
      6 *  tree. An additional intellectual property rights grant can be found
      7 *  in the file PATENTS.  All contributing project authors may
      8 *  be found in the AUTHORS file in the root of the source tree.
      9 */
     10 
     11 #include "api/video/video_timing.h"
     12 
     13 #include <algorithm>
     14 #include <cstdint>
     15 #include <string>
     16 
     17 #include "api/array_view.h"
     18 #include "api/units/time_delta.h"
     19 #include "rtc_base/logging.h"
     20 #include "rtc_base/numerics/safe_conversions.h"
     21 #include "rtc_base/strings/string_builder.h"
     22 
     23 namespace webrtc {
     24 
     25 uint16_t VideoSendTiming::GetDeltaCappedMs(int64_t base_ms, int64_t time_ms) {
     26  if (time_ms < base_ms) {
     27    RTC_DLOG(LS_ERROR) << "Delta " << (time_ms - base_ms)
     28                       << "ms expected to be positive";
     29  }
     30  return saturated_cast<uint16_t>(time_ms - base_ms);
     31 }
     32 
     33 uint16_t VideoSendTiming::GetDeltaCappedMs(TimeDelta delta) {
     34  if (delta < TimeDelta::Zero()) {
     35    RTC_DLOG(LS_ERROR) << "Delta " << delta.ms()
     36                       << "ms expected to be positive";
     37  }
     38  return saturated_cast<uint16_t>(delta.ms());
     39 }
     40 
     41 TimingFrameInfo::TimingFrameInfo()
     42    : rtp_timestamp(0),
     43      capture_time_ms(-1),
     44      encode_start_ms(-1),
     45      encode_finish_ms(-1),
     46      packetization_finish_ms(-1),
     47      pacer_exit_ms(-1),
     48      network_timestamp_ms(-1),
     49      network2_timestamp_ms(-1),
     50      receive_start_ms(-1),
     51      receive_finish_ms(-1),
     52      decode_start_ms(-1),
     53      decode_finish_ms(-1),
     54      render_time_ms(-1),
     55      flags(VideoSendTiming::kNotTriggered) {}
     56 
     57 int64_t TimingFrameInfo::EndToEndDelay() const {
     58  return capture_time_ms >= 0 ? decode_finish_ms - capture_time_ms : -1;
     59 }
     60 
     61 bool TimingFrameInfo::IsLongerThan(const TimingFrameInfo& other) const {
     62  int64_t other_delay = other.EndToEndDelay();
     63  return other_delay == -1 || EndToEndDelay() > other_delay;
     64 }
     65 
     66 bool TimingFrameInfo::operator<(const TimingFrameInfo& other) const {
     67  return other.IsLongerThan(*this);
     68 }
     69 
     70 bool TimingFrameInfo::operator<=(const TimingFrameInfo& other) const {
     71  return !IsLongerThan(other);
     72 }
     73 
     74 bool TimingFrameInfo::IsOutlier() const {
     75  return !IsInvalid() && (flags & VideoSendTiming::kTriggeredBySize);
     76 }
     77 
     78 bool TimingFrameInfo::IsTimerTriggered() const {
     79  return !IsInvalid() && (flags & VideoSendTiming::kTriggeredByTimer);
     80 }
     81 
     82 bool TimingFrameInfo::IsInvalid() const {
     83  return flags == VideoSendTiming::kInvalid;
     84 }
     85 
     86 std::string TimingFrameInfo::ToString() const {
     87  if (IsInvalid()) {
     88    return "";
     89  }
     90 
     91  char buf[1024];
     92  SimpleStringBuilder sb(buf);
     93 
     94  sb << rtp_timestamp << ',' << capture_time_ms << ',' << encode_start_ms << ','
     95     << encode_finish_ms << ',' << packetization_finish_ms << ','
     96     << pacer_exit_ms << ',' << network_timestamp_ms << ','
     97     << network2_timestamp_ms << ',' << receive_start_ms << ','
     98     << receive_finish_ms << ',' << decode_start_ms << ',' << decode_finish_ms
     99     << ',' << render_time_ms << ',' << IsOutlier() << ','
    100     << IsTimerTriggered();
    101 
    102  return sb.str();
    103 }
    104 
    105 VideoPlayoutDelay::VideoPlayoutDelay(TimeDelta min, TimeDelta max)
    106    : min_(std::clamp(min, TimeDelta::Zero(), kMax)),
    107      max_(std::clamp(max, min_, kMax)) {
    108  if (!(TimeDelta::Zero() <= min && min <= max && max <= kMax)) {
    109    RTC_LOG(LS_ERROR) << "Invalid video playout delay: [" << min << "," << max
    110                      << "]. Clamped to [" << this->min() << "," << this->max()
    111                      << "]";
    112  }
    113 }
    114 
    115 bool VideoPlayoutDelay::Set(TimeDelta min, TimeDelta max) {
    116  if (TimeDelta::Zero() <= min && min <= max && max <= kMax) {
    117    min_ = min;
    118    max_ = max;
    119    return true;
    120  }
    121  return false;
    122 }
    123 
    124 }  // namespace webrtc