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| 1 /* | |
| 2 * Copyright (c) 2012 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 "webrtc/video/vie_remb.h" | |
| 12 | |
| 13 #include <assert.h> | |
| 14 | |
| 15 #include <algorithm> | |
| 16 | |
| 17 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp.h" | |
| 18 #include "webrtc/modules/utility/include/process_thread.h" | |
| 19 | |
| 20 namespace webrtc { | |
| 21 | |
| 22 const int kRembSendIntervalMs = 200; | |
| 23 | |
| 24 // % threshold for if we should send a new REMB asap. | |
| 25 const uint32_t kSendThresholdPercent = 97; | |
| 26 | |
| 27 VieRemb::VieRemb(Clock* clock) | |
| 28 : clock_(clock), | |
| 29 last_remb_time_(clock_->TimeInMilliseconds()), | |
| 30 last_send_bitrate_(0), | |
| 31 bitrate_(0) {} | |
| 32 | |
| 33 VieRemb::~VieRemb() {} | |
| 34 | |
| 35 void VieRemb::AddReceiveChannel(RtpRtcp* rtp_rtcp) { | |
| 36 assert(rtp_rtcp); | |
| 37 | |
| 38 rtc::CritScope lock(&list_crit_); | |
| 39 if (std::find(receive_modules_.begin(), receive_modules_.end(), rtp_rtcp) != | |
| 40 receive_modules_.end()) | |
| 41 return; | |
| 42 | |
| 43 // The module probably doesn't have a remote SSRC yet, so don't add it to the | |
| 44 // map. | |
| 45 receive_modules_.push_back(rtp_rtcp); | |
| 46 } | |
| 47 | |
| 48 void VieRemb::RemoveReceiveChannel(RtpRtcp* rtp_rtcp) { | |
| 49 assert(rtp_rtcp); | |
| 50 | |
| 51 rtc::CritScope lock(&list_crit_); | |
| 52 for (RtpModules::iterator it = receive_modules_.begin(); | |
| 53 it != receive_modules_.end(); ++it) { | |
| 54 if ((*it) == rtp_rtcp) { | |
| 55 receive_modules_.erase(it); | |
| 56 break; | |
| 57 } | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 void VieRemb::AddRembSender(RtpRtcp* rtp_rtcp) { | |
| 62 assert(rtp_rtcp); | |
| 63 | |
| 64 rtc::CritScope lock(&list_crit_); | |
| 65 | |
| 66 // Verify this module hasn't been added earlier. | |
| 67 if (std::find(rtcp_sender_.begin(), rtcp_sender_.end(), rtp_rtcp) != | |
| 68 rtcp_sender_.end()) | |
| 69 return; | |
| 70 rtcp_sender_.push_back(rtp_rtcp); | |
| 71 } | |
| 72 | |
| 73 void VieRemb::RemoveRembSender(RtpRtcp* rtp_rtcp) { | |
| 74 assert(rtp_rtcp); | |
| 75 | |
| 76 rtc::CritScope lock(&list_crit_); | |
| 77 for (RtpModules::iterator it = rtcp_sender_.begin(); | |
| 78 it != rtcp_sender_.end(); ++it) { | |
| 79 if ((*it) == rtp_rtcp) { | |
| 80 rtcp_sender_.erase(it); | |
| 81 return; | |
| 82 } | |
| 83 } | |
| 84 } | |
| 85 | |
| 86 bool VieRemb::InUse() const { | |
| 87 rtc::CritScope lock(&list_crit_); | |
| 88 return !receive_modules_.empty() || !rtcp_sender_.empty(); | |
| 89 } | |
| 90 | |
| 91 void VieRemb::OnReceiveBitrateChanged(const std::vector<uint32_t>& ssrcs, | |
| 92 uint32_t bitrate) { | |
| 93 RtpRtcp* sender = nullptr; | |
| 94 { | |
| 95 rtc::CritScope lock(&list_crit_); | |
| 96 // If we already have an estimate, check if the new total estimate is below | |
| 97 // kSendThresholdPercent of the previous estimate. | |
| 98 if (last_send_bitrate_ > 0) { | |
| 99 uint32_t new_remb_bitrate = last_send_bitrate_ - bitrate_ + bitrate; | |
| 100 | |
| 101 if (new_remb_bitrate < kSendThresholdPercent * last_send_bitrate_ / 100) { | |
| 102 // The new bitrate estimate is less than kSendThresholdPercent % of the | |
| 103 // last report. Send a REMB asap. | |
| 104 last_remb_time_ = clock_->TimeInMilliseconds() - kRembSendIntervalMs; | |
| 105 } | |
| 106 } | |
| 107 bitrate_ = bitrate; | |
| 108 | |
| 109 // Calculate total receive bitrate estimate. | |
| 110 int64_t now = clock_->TimeInMilliseconds(); | |
| 111 | |
| 112 if (now - last_remb_time_ < kRembSendIntervalMs) { | |
| 113 return; | |
| 114 } | |
| 115 last_remb_time_ = now; | |
| 116 | |
| 117 if (ssrcs.empty() || receive_modules_.empty()) { | |
| 118 return; | |
| 119 } | |
| 120 | |
| 121 // Send a REMB packet. | |
| 122 if (!rtcp_sender_.empty()) { | |
| 123 sender = rtcp_sender_.front(); | |
| 124 } else { | |
| 125 sender = receive_modules_.front(); | |
| 126 } | |
| 127 last_send_bitrate_ = bitrate_; | |
| 128 } | |
| 129 | |
| 130 if (sender) { | |
| 131 sender->SetREMBData(bitrate_, ssrcs); | |
| 132 } | |
| 133 } | |
| 134 | |
| 135 } // namespace webrtc | |
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Chromium Code Reviews
Issue 2789843002:
Delete VieRemb class, move functionality to PacketRouter. (Closed)
