tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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packet.cc (2243B)

      1 /*
      2 *  Copyright (c) 2011 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 "modules/video_coding/deprecated/packet.h"
     12 
     13 #include <cstddef>
     14 #include <cstdint>
     15 #include <optional>
     16 
     17 #include "api/rtp_headers.h"
     18 #include "api/units/timestamp.h"
     19 #include "api/video/video_codec_type.h"
     20 #include "modules/rtp_rtcp/source/rtp_video_header.h"
     21 
     22 namespace webrtc {
     23 
     24 VCMPacket::VCMPacket()
     25    : payloadType(0),
     26      timestamp(0),
     27      ntp_time_ms_(0),
     28      seqNum(0),
     29      dataPtr(nullptr),
     30      sizeBytes(0),
     31      markerBit(false),
     32      timesNacked(-1),
     33      completeNALU(kNaluUnset),
     34      insertStartCode(false),
     35      video_header() {}
     36 
     37 VCMPacket::VCMPacket(const uint8_t* ptr,
     38                     size_t size,
     39                     const RTPHeader& rtp_header,
     40                     const RTPVideoHeader& videoHeader,
     41                     int64_t ntp_time_ms,
     42                     Timestamp receive_time)
     43    : payloadType(rtp_header.payloadType),
     44      timestamp(rtp_header.timestamp),
     45      ntp_time_ms_(ntp_time_ms),
     46      seqNum(rtp_header.sequenceNumber),
     47      dataPtr(ptr),
     48      sizeBytes(size),
     49      markerBit(rtp_header.markerBit),
     50      timesNacked(-1),
     51      completeNALU(kNaluIncomplete),
     52      insertStartCode(videoHeader.codec == kVideoCodecH264 &&
     53                      videoHeader.is_first_packet_in_frame),
     54      video_header(videoHeader),
     55      packet_info(rtp_header, receive_time) {
     56  if (is_first_packet_in_frame() && markerBit) {
     57    completeNALU = kNaluComplete;
     58  } else if (is_first_packet_in_frame()) {
     59    completeNALU = kNaluStart;
     60  } else if (markerBit) {
     61    completeNALU = kNaluEnd;
     62  } else {
     63    completeNALU = kNaluIncomplete;
     64  }
     65 
     66  // Playout decisions are made entirely based on first packet in a frame.
     67  if (!is_first_packet_in_frame()) {
     68    video_header.playout_delay = std::nullopt;
     69  }
     70 }
     71 
     72 VCMPacket::~VCMPacket() = default;
     73 
     74 }  // namespace webrtc