niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1 | /* |
pwestin@webrtc.org | f6bb77a | 2012-01-24 17:16:59 +0000 | [diff] [blame] | 2 | * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 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 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 11 | #include "modules/rtp_rtcp/source/rtp_sender.h" |
pwestin@webrtc.org | 571a1c0 | 2012-11-13 21:12:39 +0000 | [diff] [blame] | 12 | |
danilchap | b8b6fbb | 2015-12-10 05:05:27 -0800 | [diff] [blame] | 13 | #include <algorithm> |
Johannes Kron | 965e794 | 2018-09-13 15:36:20 +0200 | [diff] [blame] | 14 | #include <limits> |
Steve Anton | 296a0ce | 2018-03-22 15:17:27 -0700 | [diff] [blame] | 15 | #include <string> |
Shao Changbin | e62202f | 2015-04-21 20:24:50 +0800 | [diff] [blame] | 16 | #include <utility> |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 17 | |
Karl Wiberg | 918f50c | 2018-07-05 11:40:33 +0200 | [diff] [blame] | 18 | #include "absl/memory/memory.h" |
Niels Möller | aa3c1cc | 2018-11-02 10:54:56 +0100 | [diff] [blame] | 19 | #include "absl/strings/match.h" |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 20 | #include "api/array_view.h" |
Elad Alon | 4a87e1c | 2017-10-03 16:11:34 +0200 | [diff] [blame] | 21 | #include "logging/rtc_event_log/events/rtc_event_rtp_packet_outgoing.h" |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 22 | #include "logging/rtc_event_log/rtc_event_log.h" |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 23 | #include "modules/rtp_rtcp/include/rtp_cvo.h" |
| 24 | #include "modules/rtp_rtcp/source/byte_io.h" |
philipel | 569397f | 2018-09-26 12:25:31 +0200 | [diff] [blame] | 25 | #include "modules/rtp_rtcp/source/rtp_generic_frame_descriptor_extension.h" |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 26 | #include "modules/rtp_rtcp/source/rtp_header_extensions.h" |
| 27 | #include "modules/rtp_rtcp/source/rtp_packet_to_send.h" |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 28 | #include "modules/rtp_rtcp/source/time_util.h" |
| 29 | #include "rtc_base/arraysize.h" |
| 30 | #include "rtc_base/checks.h" |
| 31 | #include "rtc_base/logging.h" |
Karl Wiberg | e40468b | 2017-11-22 10:42:26 +0100 | [diff] [blame] | 32 | #include "rtc_base/numerics/safe_minmax.h" |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 33 | #include "rtc_base/rate_limiter.h" |
Steve Anton | 10542f2 | 2019-01-11 09:11:00 -0800 | [diff] [blame] | 34 | #include "rtc_base/time_utils.h" |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 35 | |
| 36 | namespace webrtc { |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 37 | |
hclam@chromium.org | 806dc3b | 2013-04-09 19:54:10 +0000 | [diff] [blame] | 38 | namespace { |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 39 | // Max in the RFC 3550 is 255 bytes, we limit it to be modulus 32 for SRTP. |
| 40 | constexpr size_t kMaxPaddingLength = 224; |
stefan | 53b6cc3 | 2017-02-03 08:13:57 -0800 | [diff] [blame] | 41 | constexpr size_t kMinAudioPaddingLength = 50; |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 42 | constexpr int kSendSideDelayWindowMs = 1000; |
| 43 | constexpr size_t kRtpHeaderLength = 12; |
| 44 | constexpr uint16_t kMaxInitRtpSeqNumber = 32767; // 2^15 -1. |
| 45 | constexpr uint32_t kTimestampTicksPerMs = 90; |
| 46 | constexpr int kBitrateStatisticsWindowMs = 1000; |
guoweis@webrtc.org | 4536289 | 2015-03-04 22:55:15 +0000 | [diff] [blame] | 47 | |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 48 | constexpr size_t kMinFlexfecPacketsToStoreForPacing = 50; |
| 49 | |
Erik Språng | 214f543 | 2019-06-20 15:09:58 +0200 | [diff] [blame] | 50 | // Min size needed to get payload padding from packet history. |
| 51 | constexpr int kMinPayloadPaddingBytes = 50; |
| 52 | |
erikvarga | 2788373 | 2017-05-17 05:08:38 -0700 | [diff] [blame] | 53 | template <typename Extension> |
| 54 | constexpr RtpExtensionSize CreateExtensionSize() { |
| 55 | return {Extension::kId, Extension::kValueSizeBytes}; |
| 56 | } |
| 57 | |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 58 | template <typename Extension> |
| 59 | constexpr RtpExtensionSize CreateMaxExtensionSize() { |
| 60 | return {Extension::kId, Extension::kMaxValueSizeBytes}; |
| 61 | } |
| 62 | |
erikvarga | 2788373 | 2017-05-17 05:08:38 -0700 | [diff] [blame] | 63 | // Size info for header extensions that might be used in padding or FEC packets. |
Ilya Nikolaevskiy | 1d037ae | 2018-03-15 15:46:17 +0100 | [diff] [blame] | 64 | constexpr RtpExtensionSize kFecOrPaddingExtensionSizes[] = { |
erikvarga | 2788373 | 2017-05-17 05:08:38 -0700 | [diff] [blame] | 65 | CreateExtensionSize<AbsoluteSendTime>(), |
| 66 | CreateExtensionSize<TransmissionOffset>(), |
| 67 | CreateExtensionSize<TransportSequenceNumber>(), |
| 68 | CreateExtensionSize<PlayoutDelayLimits>(), |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 69 | CreateMaxExtensionSize<RtpMid>(), |
erikvarga | 2788373 | 2017-05-17 05:08:38 -0700 | [diff] [blame] | 70 | }; |
| 71 | |
Ilya Nikolaevskiy | 1d037ae | 2018-03-15 15:46:17 +0100 | [diff] [blame] | 72 | // Size info for header extensions that might be used in video packets. |
| 73 | constexpr RtpExtensionSize kVideoExtensionSizes[] = { |
| 74 | CreateExtensionSize<AbsoluteSendTime>(), |
| 75 | CreateExtensionSize<TransmissionOffset>(), |
| 76 | CreateExtensionSize<TransportSequenceNumber>(), |
| 77 | CreateExtensionSize<PlayoutDelayLimits>(), |
| 78 | CreateExtensionSize<VideoOrientation>(), |
| 79 | CreateExtensionSize<VideoContentTypeExtension>(), |
| 80 | CreateExtensionSize<VideoTimingExtension>(), |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 81 | CreateMaxExtensionSize<RtpStreamId>(), |
| 82 | CreateMaxExtensionSize<RepairedRtpStreamId>(), |
| 83 | CreateMaxExtensionSize<RtpMid>(), |
Elad Alon | ccb9b75 | 2019-02-19 13:01:31 +0100 | [diff] [blame] | 84 | {RtpGenericFrameDescriptorExtension00::kId, |
| 85 | RtpGenericFrameDescriptorExtension00::kMaxSizeBytes}, |
| 86 | {RtpGenericFrameDescriptorExtension01::kId, |
| 87 | RtpGenericFrameDescriptorExtension01::kMaxSizeBytes}, |
Ilya Nikolaevskiy | 1d037ae | 2018-03-15 15:46:17 +0100 | [diff] [blame] | 88 | }; |
| 89 | |
Erik Språng | 13eb764 | 2019-06-24 10:58:48 +0200 | [diff] [blame] | 90 | // TODO(bugs.webrtc.org/10633): Remove when downstream code stops using |
| 91 | // priority. At the time of writing, the priority can be directly mapped to a |
| 92 | // packet type. This is only for a transition period. |
| 93 | RtpPacketToSend::Type PacketPriorityToType(RtpPacketSender::Priority priority) { |
| 94 | switch (priority) { |
| 95 | case RtpPacketSender::Priority::kLowPriority: |
| 96 | return RtpPacketToSend::Type::kVideo; |
| 97 | case RtpPacketSender::Priority::kNormalPriority: |
| 98 | return RtpPacketToSend::Type::kRetransmission; |
| 99 | case RtpPacketSender::Priority::kHighPriority: |
| 100 | return RtpPacketToSend::Type::kAudio; |
| 101 | default: |
| 102 | RTC_NOTREACHED() << "Unexpected priority: " << priority; |
| 103 | return RtpPacketToSend::Type::kVideo; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | // TODO(bugs.webrtc.org/10633): Remove when packets are always owned by pacer. |
| 108 | RtpPacketSender::Priority PacketTypeToPriority(RtpPacketToSend::Type type) { |
| 109 | switch (type) { |
| 110 | case RtpPacketToSend::Type::kAudio: |
| 111 | return RtpPacketSender::Priority::kHighPriority; |
| 112 | case RtpPacketToSend::Type::kVideo: |
| 113 | return RtpPacketSender::Priority::kLowPriority; |
| 114 | case RtpPacketToSend::Type::kRetransmission: |
| 115 | return RtpPacketSender::Priority::kNormalPriority; |
| 116 | case RtpPacketToSend::Type::kForwardErrorCorrection: |
| 117 | return RtpPacketSender::Priority::kLowPriority; |
| 118 | break; |
| 119 | case RtpPacketToSend::Type::kPadding: |
| 120 | RTC_NOTREACHED() << "Unexpected type for legacy path: kPadding"; |
| 121 | break; |
| 122 | } |
| 123 | return RtpPacketSender::Priority::kLowPriority; |
| 124 | } |
| 125 | |
hclam@chromium.org | 806dc3b | 2013-04-09 19:54:10 +0000 | [diff] [blame] | 126 | } // namespace |
| 127 | |
Amit Hilbuch | 02d7d35 | 2019-07-02 21:04:57 +0000 | [diff] [blame^] | 128 | RTPSender::RTPSender( |
| 129 | bool audio, |
| 130 | Clock* clock, |
| 131 | Transport* transport, |
| 132 | RtpPacketPacer* paced_sender, |
| 133 | absl::optional<uint32_t> flexfec_ssrc, |
| 134 | TransportSequenceNumberAllocator* sequence_number_allocator, |
| 135 | TransportFeedbackObserver* transport_feedback_observer, |
| 136 | BitrateStatisticsObserver* bitrate_callback, |
| 137 | SendSideDelayObserver* send_side_delay_observer, |
| 138 | RtcEventLog* event_log, |
| 139 | SendPacketObserver* send_packet_observer, |
| 140 | RateLimiter* retransmission_rate_limiter, |
| 141 | OverheadObserver* overhead_observer, |
| 142 | bool populate_network2_timestamp, |
| 143 | FrameEncryptorInterface* frame_encryptor, |
| 144 | bool require_frame_encryption, |
| 145 | bool extmap_allow_mixed, |
| 146 | const WebRtcKeyValueConfig& field_trials) |
| 147 | : clock_(clock), |
danilchap | 47a740b | 2015-12-15 00:30:07 -0800 | [diff] [blame] | 148 | random_(clock_->TimeInMicroseconds()), |
Amit Hilbuch | 02d7d35 | 2019-07-02 21:04:57 +0000 | [diff] [blame^] | 149 | audio_configured_(audio), |
| 150 | flexfec_ssrc_(flexfec_ssrc), |
| 151 | paced_sender_(paced_sender), |
| 152 | transport_sequence_number_allocator_(sequence_number_allocator), |
| 153 | transport_feedback_observer_(transport_feedback_observer), |
| 154 | transport_(transport), |
Sebastian Jansson | 1bca65b | 2018-10-10 09:58:08 +0200 | [diff] [blame] | 155 | sending_media_(true), // Default to sending media. |
| 156 | force_part_of_allocation_(false), |
nisse | 284542b | 2017-01-10 08:58:32 -0800 | [diff] [blame] | 157 | max_packet_size_(IP_PACKET_SIZE - 28), // Default is IP-v4/UDP. |
Danil Chapovalov | b3179c7 | 2018-03-22 10:13:07 +0100 | [diff] [blame] | 158 | last_payload_type_(-1), |
Amit Hilbuch | 02d7d35 | 2019-07-02 21:04:57 +0000 | [diff] [blame^] | 159 | rtp_header_extension_map_(extmap_allow_mixed), |
| 160 | packet_history_(clock), |
| 161 | flexfec_packet_history_(clock), |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 162 | // Statistics |
Johannes Kron | 4a8a5e7 | 2018-09-26 09:57:48 +0200 | [diff] [blame] | 163 | send_delays_(), |
| 164 | max_delay_it_(send_delays_.end()), |
| 165 | sum_delays_ms_(0), |
Henrik Boström | 9fe1834 | 2019-05-16 18:38:20 +0200 | [diff] [blame] | 166 | total_packet_send_delay_ms_(0), |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 167 | rtp_stats_callback_(nullptr), |
| 168 | total_bitrate_sent_(kBitrateStatisticsWindowMs, |
| 169 | RateStatistics::kBpsScale), |
| 170 | nack_bitrate_sent_(kBitrateStatisticsWindowMs, RateStatistics::kBpsScale), |
Amit Hilbuch | 02d7d35 | 2019-07-02 21:04:57 +0000 | [diff] [blame^] | 171 | send_side_delay_observer_(send_side_delay_observer), |
| 172 | event_log_(event_log), |
| 173 | send_packet_observer_(send_packet_observer), |
| 174 | bitrate_callback_(bitrate_callback), |
sprang@webrtc.org | ebad765 | 2013-12-05 14:29:02 +0000 | [diff] [blame] | 175 | // RTP variables |
sprang@webrtc.org | 6811b6e | 2013-12-13 09:46:59 +0000 | [diff] [blame] | 176 | sequence_number_forced_(false), |
danilchap | e5b4141 | 2016-08-22 03:39:23 -0700 | [diff] [blame] | 177 | last_rtp_timestamp_(0), |
sprang@webrtc.org | 6811b6e | 2013-12-13 09:46:59 +0000 | [diff] [blame] | 178 | capture_time_ms_(0), |
| 179 | last_timestamp_time_ms_(0), |
stefan@webrtc.org | 8b94e3d | 2014-07-17 16:10:14 +0000 | [diff] [blame] | 180 | media_has_been_sent_(false), |
sprang@webrtc.org | 6811b6e | 2013-12-13 09:46:59 +0000 | [diff] [blame] | 181 | last_packet_marker_bit_(false), |
sprang@webrtc.org | 6811b6e | 2013-12-13 09:46:59 +0000 | [diff] [blame] | 182 | csrcs_(), |
sprang@webrtc.org | 6811b6e | 2013-12-13 09:46:59 +0000 | [diff] [blame] | 183 | rtx_(kRtxOff), |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 184 | rtp_overhead_bytes_per_packet_(0), |
Amit Hilbuch | 02d7d35 | 2019-07-02 21:04:57 +0000 | [diff] [blame^] | 185 | retransmission_rate_limiter_(retransmission_rate_limiter), |
| 186 | overhead_observer_(overhead_observer), |
| 187 | populate_network2_timestamp_(populate_network2_timestamp), |
elad.alon | c3dfff3 | 2017-01-26 02:46:55 -0800 | [diff] [blame] | 188 | send_side_bwe_with_overhead_( |
Amit Hilbuch | 02d7d35 | 2019-07-02 21:04:57 +0000 | [diff] [blame^] | 189 | field_trials.Lookup("WebRTC-SendSideBwe-WithOverhead") |
| 190 | .find("Enabled") == 0), |
Erik Språng | d2a6344 | 2019-05-03 10:58:50 -0400 | [diff] [blame] | 191 | legacy_packet_history_storage_mode_( |
Amit Hilbuch | 02d7d35 | 2019-07-02 21:04:57 +0000 | [diff] [blame^] | 192 | field_trials.Lookup("WebRTC-UseRtpPacketHistoryLegacyStorageMode") |
| 193 | .find("Enabled") == 0), |
Erik Språng | 4ffed7c | 2019-05-28 11:18:04 +0200 | [diff] [blame] | 194 | payload_padding_prefer_useful_packets_( |
Amit Hilbuch | 02d7d35 | 2019-07-02 21:04:57 +0000 | [diff] [blame^] | 195 | field_trials.Lookup("WebRTC-PayloadPadding-UseMostUsefulPacket") |
| 196 | .find("Disabled") != 0) { |
danilchap | 71fead2 | 2016-08-18 02:01:49 -0700 | [diff] [blame] | 197 | // This random initialization is not intended to be cryptographic strong. |
| 198 | timestamp_offset_ = random_.Rand<uint32_t>(); |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 199 | // Random start, 16 bits. Can't be 0. |
danilchap | 47a740b | 2015-12-15 00:30:07 -0800 | [diff] [blame] | 200 | sequence_number_rtx_ = random_.Rand(1, kMaxInitRtpSeqNumber); |
| 201 | sequence_number_ = random_.Rand(1, kMaxInitRtpSeqNumber); |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 202 | |
| 203 | // Store FlexFEC packets in the packet history data structure, so they can |
| 204 | // be found when paced. |
Niels Möller | 59ab1cf | 2019-02-06 22:48:11 +0100 | [diff] [blame] | 205 | if (flexfec_ssrc_) { |
Erik Språng | d2a6344 | 2019-05-03 10:58:50 -0400 | [diff] [blame] | 206 | RtpPacketHistory::StorageMode storage_mode = |
| 207 | legacy_packet_history_storage_mode_ |
| 208 | ? RtpPacketHistory::StorageMode::kStore |
| 209 | : RtpPacketHistory::StorageMode::kStoreAndCull; |
| 210 | |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 211 | flexfec_packet_history_.SetStorePacketsStatus( |
Erik Språng | d2a6344 | 2019-05-03 10:58:50 -0400 | [diff] [blame] | 212 | storage_mode, kMinFlexfecPacketsToStoreForPacing); |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 213 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 214 | } |
| 215 | |
pwestin@webrtc.org | 0074187 | 2012-01-19 15:56:10 +0000 | [diff] [blame] | 216 | RTPSender::~RTPSender() { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 217 | // TODO(tommi): Use a thread checker to ensure the object is created and |
| 218 | // deleted on the same thread. At the moment this isn't possible due to |
| 219 | // voe::ChannelOwner in voice engine. To reproduce, run: |
| 220 | // voe_auto_test --automated --gtest_filter=*MixManyChannelsForStressOpus |
| 221 | |
| 222 | // TODO(tommi,holmer): We don't grab locks in the dtor before accessing member |
| 223 | // variables but we grab them in all other methods. (what's the design?) |
| 224 | // Start documenting what thread we're on in what method so that it's easier |
| 225 | // to understand performance attributes and possibly remove locks. |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 226 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 227 | |
erikvarga | 2788373 | 2017-05-17 05:08:38 -0700 | [diff] [blame] | 228 | rtc::ArrayView<const RtpExtensionSize> RTPSender::FecExtensionSizes() { |
Ilya Nikolaevskiy | 1d037ae | 2018-03-15 15:46:17 +0100 | [diff] [blame] | 229 | return rtc::MakeArrayView(kFecOrPaddingExtensionSizes, |
| 230 | arraysize(kFecOrPaddingExtensionSizes)); |
| 231 | } |
| 232 | |
| 233 | rtc::ArrayView<const RtpExtensionSize> RTPSender::VideoExtensionSizes() { |
| 234 | return rtc::MakeArrayView(kVideoExtensionSizes, |
| 235 | arraysize(kVideoExtensionSizes)); |
erikvarga | 2788373 | 2017-05-17 05:08:38 -0700 | [diff] [blame] | 236 | } |
| 237 | |
pbos@webrtc.org | 2f44673 | 2013-04-08 11:08:41 +0000 | [diff] [blame] | 238 | uint16_t RTPSender::ActualSendBitrateKbit() const { |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 239 | rtc::CritScope cs(&statistics_crit_); |
| 240 | return static_cast<uint16_t>( |
| 241 | total_bitrate_sent_.Rate(clock_->TimeInMilliseconds()).value_or(0) / |
| 242 | 1000); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 243 | } |
| 244 | |
pbos@webrtc.org | 2f44673 | 2013-04-08 11:08:41 +0000 | [diff] [blame] | 245 | uint32_t RTPSender::NackOverheadRate() const { |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 246 | rtc::CritScope cs(&statistics_crit_); |
| 247 | return nack_bitrate_sent_.Rate(clock_->TimeInMilliseconds()).value_or(0); |
stefan@webrtc.org | d0bdab0 | 2011-10-14 14:24:54 +0000 | [diff] [blame] | 248 | } |
| 249 | |
Johannes Kron | 9190b82 | 2018-10-29 11:22:05 +0100 | [diff] [blame] | 250 | void RTPSender::SetExtmapAllowMixed(bool extmap_allow_mixed) { |
| 251 | rtc::CritScope lock(&send_critsect_); |
| 252 | rtp_header_extension_map_.SetExtmapAllowMixed(extmap_allow_mixed); |
| 253 | } |
| 254 | |
pbos@webrtc.org | d16e839 | 2014-12-19 13:49:55 +0000 | [diff] [blame] | 255 | int32_t RTPSender::RegisterRtpHeaderExtension(RTPExtensionType type, |
| 256 | uint8_t id) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 257 | rtc::CritScope lock(&send_critsect_); |
danilchap | fab482b | 2017-04-04 02:33:48 -0700 | [diff] [blame] | 258 | return rtp_header_extension_map_.RegisterByType(id, type) ? 0 : -1; |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 259 | } |
| 260 | |
Danil Chapovalov | 585d1aa | 2018-09-14 18:29:32 +0200 | [diff] [blame] | 261 | bool RTPSender::RegisterRtpHeaderExtension(const std::string& uri, int id) { |
| 262 | rtc::CritScope lock(&send_critsect_); |
| 263 | return rtp_header_extension_map_.RegisterByUri(id, uri); |
| 264 | } |
| 265 | |
stefan | 53b6cc3 | 2017-02-03 08:13:57 -0800 | [diff] [blame] | 266 | bool RTPSender::IsRtpHeaderExtensionRegistered(RTPExtensionType type) const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 267 | rtc::CritScope lock(&send_critsect_); |
guoweis@webrtc.org | 4536289 | 2015-03-04 22:55:15 +0000 | [diff] [blame] | 268 | return rtp_header_extension_map_.IsRegistered(type); |
| 269 | } |
| 270 | |
pbos@webrtc.org | d16e839 | 2014-12-19 13:49:55 +0000 | [diff] [blame] | 271 | int32_t RTPSender::DeregisterRtpHeaderExtension(RTPExtensionType type) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 272 | rtc::CritScope lock(&send_critsect_); |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 273 | return rtp_header_extension_map_.Deregister(type); |
asapersson@webrtc.org | 5249cc8 | 2011-12-16 14:31:37 +0000 | [diff] [blame] | 274 | } |
| 275 | |
nisse | 284542b | 2017-01-10 08:58:32 -0800 | [diff] [blame] | 276 | void RTPSender::SetMaxRtpPacketSize(size_t max_packet_size) { |
kwiberg | ee89e78 | 2017-08-09 17:22:01 -0700 | [diff] [blame] | 277 | RTC_DCHECK_GE(max_packet_size, 100); |
| 278 | RTC_DCHECK_LE(max_packet_size, IP_PACKET_SIZE); |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 279 | rtc::CritScope lock(&send_critsect_); |
nisse | 284542b | 2017-01-10 08:58:32 -0800 | [diff] [blame] | 280 | max_packet_size_ = max_packet_size; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 281 | } |
| 282 | |
nisse | 284542b | 2017-01-10 08:58:32 -0800 | [diff] [blame] | 283 | size_t RTPSender::MaxRtpPacketSize() const { |
| 284 | return max_packet_size_; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 285 | } |
| 286 | |
pbos@webrtc.org | 0b0c241 | 2015-01-13 14:15:15 +0000 | [diff] [blame] | 287 | void RTPSender::SetRtxStatus(int mode) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 288 | rtc::CritScope lock(&send_critsect_); |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 289 | rtx_ = mode; |
stefan@webrtc.org | ef92755 | 2014-06-05 08:25:29 +0000 | [diff] [blame] | 290 | } |
| 291 | |
pbos@webrtc.org | 0b0c241 | 2015-01-13 14:15:15 +0000 | [diff] [blame] | 292 | int RTPSender::RtxStatus() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 293 | rtc::CritScope lock(&send_critsect_); |
pbos@webrtc.org | 0b0c241 | 2015-01-13 14:15:15 +0000 | [diff] [blame] | 294 | return rtx_; |
| 295 | } |
| 296 | |
stefan@webrtc.org | ef92755 | 2014-06-05 08:25:29 +0000 | [diff] [blame] | 297 | void RTPSender::SetRtxSsrc(uint32_t ssrc) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 298 | rtc::CritScope lock(&send_critsect_); |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 299 | ssrc_rtx_.emplace(ssrc); |
pwestin@webrtc.org | 8281e7d | 2012-01-10 14:09:18 +0000 | [diff] [blame] | 300 | } |
| 301 | |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 302 | uint32_t RTPSender::RtxSsrc() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 303 | rtc::CritScope lock(&send_critsect_); |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 304 | RTC_DCHECK(ssrc_rtx_); |
| 305 | return *ssrc_rtx_; |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 306 | } |
| 307 | |
Shao Changbin | e62202f | 2015-04-21 20:24:50 +0800 | [diff] [blame] | 308 | void RTPSender::SetRtxPayloadType(int payload_type, |
| 309 | int associated_payload_type) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 310 | rtc::CritScope lock(&send_critsect_); |
henrikg | 91d6ede | 2015-09-17 00:24:34 -0700 | [diff] [blame] | 311 | RTC_DCHECK_LE(payload_type, 127); |
| 312 | RTC_DCHECK_LE(associated_payload_type, 127); |
Shao Changbin | e62202f | 2015-04-21 20:24:50 +0800 | [diff] [blame] | 313 | if (payload_type < 0) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 314 | RTC_LOG(LS_ERROR) << "Invalid RTX payload type: " << payload_type << "."; |
Shao Changbin | e62202f | 2015-04-21 20:24:50 +0800 | [diff] [blame] | 315 | return; |
| 316 | } |
| 317 | |
| 318 | rtx_payload_type_map_[associated_payload_type] = payload_type; |
Åsa Persson | 6ae2572 | 2015-04-13 17:48:08 +0200 | [diff] [blame] | 319 | } |
| 320 | |
philipel | a1ed0b3 | 2016-06-01 06:31:17 -0700 | [diff] [blame] | 321 | size_t RTPSender::TrySendRedundantPayloads(size_t bytes_to_send, |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 322 | const PacedPacketInfo& pacing_info) { |
andresp@webrtc.org | 817a034 | 2014-08-14 08:24:47 +0000 | [diff] [blame] | 323 | { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 324 | rtc::CritScope lock(&send_critsect_); |
Peter Boström | fc968a2 | 2016-02-19 16:14:37 +0100 | [diff] [blame] | 325 | if (!sending_media_) |
| 326 | return 0; |
andresp@webrtc.org | 817a034 | 2014-08-14 08:24:47 +0000 | [diff] [blame] | 327 | if ((rtx_ & kRtxRedundantPayloads) == 0) |
| 328 | return 0; |
| 329 | } |
| 330 | |
pkasting@chromium.org | 4591fbd | 2014-11-20 22:28:14 +0000 | [diff] [blame] | 331 | int bytes_left = static_cast<int>(bytes_to_send); |
Erik Språng | 214f543 | 2019-06-20 15:09:58 +0200 | [diff] [blame] | 332 | while (bytes_left >= kMinPayloadPaddingBytes) { |
Erik Språng | 4ffed7c | 2019-05-28 11:18:04 +0200 | [diff] [blame] | 333 | std::unique_ptr<RtpPacketToSend> packet; |
| 334 | if (payload_padding_prefer_useful_packets_) { |
| 335 | packet = packet_history_.GetPayloadPaddingPacket(); |
| 336 | } else { |
| 337 | packet = packet_history_.GetBestFittingPacket(bytes_left); |
| 338 | } |
| 339 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 340 | if (!packet) |
stefan@webrtc.org | 7e9315b | 2013-12-04 10:24:26 +0000 | [diff] [blame] | 341 | break; |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 342 | size_t payload_size = packet->payload_size(); |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 343 | if (!PrepareAndSendPacket(std::move(packet), true, false, pacing_info)) |
pkasting@chromium.org | 4591fbd | 2014-11-20 22:28:14 +0000 | [diff] [blame] | 344 | break; |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 345 | bytes_left -= payload_size; |
stefan@webrtc.org | 7e9315b | 2013-12-04 10:24:26 +0000 | [diff] [blame] | 346 | } |
| 347 | return bytes_to_send - bytes_left; |
| 348 | } |
| 349 | |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 350 | size_t RTPSender::SendPadData(size_t bytes, |
| 351 | const PacedPacketInfo& pacing_info) { |
stefan | 53b6cc3 | 2017-02-03 08:13:57 -0800 | [diff] [blame] | 352 | size_t padding_bytes_in_packet; |
erikvarga | 76a5593 | 2017-05-17 07:50:17 -0700 | [diff] [blame] | 353 | size_t max_payload_size = max_packet_size_ - RtpHeaderLength(); |
erikvarga | 2788373 | 2017-05-17 05:08:38 -0700 | [diff] [blame] | 354 | |
stefan | 53b6cc3 | 2017-02-03 08:13:57 -0800 | [diff] [blame] | 355 | if (audio_configured_) { |
| 356 | // Allow smaller padding packets for audio. |
Erik Språng | 478cb46 | 2019-06-26 15:49:27 +0200 | [diff] [blame] | 357 | padding_bytes_in_packet = |
| 358 | rtc::SafeClamp(bytes, kMinAudioPaddingLength, |
| 359 | rtc::SafeMin(max_payload_size, kMaxPaddingLength)); |
stefan | 53b6cc3 | 2017-02-03 08:13:57 -0800 | [diff] [blame] | 360 | } else { |
| 361 | // Always send full padding packets. This is accounted for by the |
| 362 | // RtpPacketSender, which will make sure we don't send too much padding even |
| 363 | // if a single packet is larger than requested. |
| 364 | // We do this to avoid frequently sending small packets on higher bitrates. |
Erik Språng | 478cb46 | 2019-06-26 15:49:27 +0200 | [diff] [blame] | 365 | padding_bytes_in_packet = rtc::SafeMin(max_payload_size, kMaxPaddingLength); |
stefan | 53b6cc3 | 2017-02-03 08:13:57 -0800 | [diff] [blame] | 366 | } |
pkasting@chromium.org | 4591fbd | 2014-11-20 22:28:14 +0000 | [diff] [blame] | 367 | size_t bytes_sent = 0; |
danilchap | 9006987 | 2016-12-14 06:16:33 -0800 | [diff] [blame] | 368 | while (bytes_sent < bytes) { |
| 369 | int64_t now_ms = clock_->TimeInMilliseconds(); |
stefan@webrtc.org | 8ccb9f9 | 2013-06-19 14:13:42 +0000 | [diff] [blame] | 370 | uint32_t ssrc; |
danilchap | 9006987 | 2016-12-14 06:16:33 -0800 | [diff] [blame] | 371 | uint32_t timestamp; |
| 372 | int64_t capture_time_ms; |
stefan@webrtc.org | 8ccb9f9 | 2013-06-19 14:13:42 +0000 | [diff] [blame] | 373 | uint16_t sequence_number; |
andresp@webrtc.org | 817a034 | 2014-08-14 08:24:47 +0000 | [diff] [blame] | 374 | int payload_type; |
pbos@webrtc.org | 63c60ed | 2014-07-16 09:37:29 +0000 | [diff] [blame] | 375 | bool over_rtx; |
stefan@webrtc.org | 8ccb9f9 | 2013-06-19 14:13:42 +0000 | [diff] [blame] | 376 | { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 377 | rtc::CritScope lock(&send_critsect_); |
Peter Boström | fc968a2 | 2016-02-19 16:14:37 +0100 | [diff] [blame] | 378 | if (!sending_media_) |
danilchap | 9006987 | 2016-12-14 06:16:33 -0800 | [diff] [blame] | 379 | break; |
| 380 | timestamp = last_rtp_timestamp_; |
| 381 | capture_time_ms = capture_time_ms_; |
stefan@webrtc.org | 8ccb9f9 | 2013-06-19 14:13:42 +0000 | [diff] [blame] | 382 | if (rtx_ == kRtxOff) { |
Danil Chapovalov | b3179c7 | 2018-03-22 10:13:07 +0100 | [diff] [blame] | 383 | if (last_payload_type_ == -1) |
stefan | e35f89a | 2017-02-01 09:06:25 -0800 | [diff] [blame] | 384 | break; |
stefan | 53b6cc3 | 2017-02-03 08:13:57 -0800 | [diff] [blame] | 385 | // Without RTX we can't send padding in the middle of frames. |
| 386 | // For audio marker bits doesn't mark the end of a frame and frames |
| 387 | // are usually a single packet, so for now we don't apply this rule |
| 388 | // for audio. |
| 389 | if (!audio_configured_ && !last_packet_marker_bit_) { |
| 390 | break; |
| 391 | } |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 392 | if (!ssrc_) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 393 | RTC_LOG(LS_ERROR) << "SSRC unset."; |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | RTC_DCHECK(ssrc_); |
| 398 | ssrc = *ssrc_; |
| 399 | |
stefan@webrtc.org | 8ccb9f9 | 2013-06-19 14:13:42 +0000 | [diff] [blame] | 400 | sequence_number = sequence_number_; |
| 401 | ++sequence_number_; |
Danil Chapovalov | b3179c7 | 2018-03-22 10:13:07 +0100 | [diff] [blame] | 402 | payload_type = last_payload_type_; |
pbos@webrtc.org | 63c60ed | 2014-07-16 09:37:29 +0000 | [diff] [blame] | 403 | over_rtx = false; |
stefan@webrtc.org | 8ccb9f9 | 2013-06-19 14:13:42 +0000 | [diff] [blame] | 404 | } else { |
Stefan Holmer | f5dca48 | 2016-01-27 12:58:51 +0100 | [diff] [blame] | 405 | // Without abs-send-time or transport sequence number a media packet |
| 406 | // must be sent before padding so that the timestamps used for |
| 407 | // estimation are correct. |
| 408 | if (!media_has_been_sent_ && |
danilchap | 9006987 | 2016-12-14 06:16:33 -0800 | [diff] [blame] | 409 | !(rtp_header_extension_map_.IsRegistered(AbsoluteSendTime::kId) || |
| 410 | (rtp_header_extension_map_.IsRegistered( |
| 411 | TransportSequenceNumber::kId) && |
| 412 | transport_sequence_number_allocator_))) { |
| 413 | break; |
Stefan Holmer | f5dca48 | 2016-01-27 12:58:51 +0100 | [diff] [blame] | 414 | } |
Stefan Holmer | 586b19b | 2015-09-18 11:14:31 +0200 | [diff] [blame] | 415 | // Only change change the timestamp of padding packets sent over RTX. |
| 416 | // Padding only packets over RTP has to be sent as part of a media |
| 417 | // frame (and therefore the same timestamp). |
| 418 | if (last_timestamp_time_ms_ > 0) { |
| 419 | timestamp += |
danilchap | 9006987 | 2016-12-14 06:16:33 -0800 | [diff] [blame] | 420 | (now_ms - last_timestamp_time_ms_) * kTimestampTicksPerMs; |
| 421 | capture_time_ms += (now_ms - last_timestamp_time_ms_); |
Stefan Holmer | 586b19b | 2015-09-18 11:14:31 +0200 | [diff] [blame] | 422 | } |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 423 | if (!ssrc_rtx_) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 424 | RTC_LOG(LS_ERROR) << "RTX SSRC unset."; |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 425 | return 0; |
| 426 | } |
| 427 | RTC_DCHECK(ssrc_rtx_); |
| 428 | ssrc = *ssrc_rtx_; |
stefan@webrtc.org | 8ccb9f9 | 2013-06-19 14:13:42 +0000 | [diff] [blame] | 429 | sequence_number = sequence_number_rtx_; |
| 430 | ++sequence_number_rtx_; |
Stefan Holmer | 1088001 | 2016-02-03 13:29:59 +0100 | [diff] [blame] | 431 | payload_type = rtx_payload_type_map_.begin()->second; |
pbos@webrtc.org | 63c60ed | 2014-07-16 09:37:29 +0000 | [diff] [blame] | 432 | over_rtx = true; |
stefan@webrtc.org | 8ccb9f9 | 2013-06-19 14:13:42 +0000 | [diff] [blame] | 433 | } |
| 434 | } |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 435 | |
danilchap | 9006987 | 2016-12-14 06:16:33 -0800 | [diff] [blame] | 436 | RtpPacketToSend padding_packet(&rtp_header_extension_map_); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 437 | padding_packet.SetPayloadType(payload_type); |
| 438 | padding_packet.SetMarker(false); |
| 439 | padding_packet.SetSequenceNumber(sequence_number); |
| 440 | padding_packet.SetTimestamp(timestamp); |
| 441 | padding_packet.SetSsrc(ssrc); |
| 442 | |
pbos@webrtc.org | 72491b9 | 2014-07-10 16:24:54 +0000 | [diff] [blame] | 443 | if (capture_time_ms > 0) { |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 444 | padding_packet.SetExtension<TransmissionOffset>( |
danilchap | 9006987 | 2016-12-14 06:16:33 -0800 | [diff] [blame] | 445 | (now_ms - capture_time_ms) * kTimestampTicksPerMs); |
pwestin@webrtc.org | 12d97f6 | 2012-01-05 10:54:44 +0000 | [diff] [blame] | 446 | } |
Danil Chapovalov | f3ba648 | 2017-06-12 15:43:55 +0200 | [diff] [blame] | 447 | padding_packet.SetExtension<AbsoluteSendTime>( |
| 448 | AbsoluteSendTime::MsTo24Bits(now_ms)); |
stefan | 1d8a506 | 2015-10-02 03:39:33 -0700 | [diff] [blame] | 449 | PacketOptions options; |
Petter Strandmark | 26bc669 | 2018-05-29 08:43:35 +0200 | [diff] [blame] | 450 | // Padding packets are never retransmissions. |
| 451 | options.is_retransmit = false; |
Sebastian Jansson | 30e2d6e | 2018-10-09 18:27:36 +0200 | [diff] [blame] | 452 | bool has_transport_seq_num; |
| 453 | { |
| 454 | rtc::CritScope lock(&send_critsect_); |
| 455 | has_transport_seq_num = |
| 456 | UpdateTransportSequenceNumber(&padding_packet, &options.packet_id); |
Sebastian Jansson | 1bca65b | 2018-10-10 09:58:08 +0200 | [diff] [blame] | 457 | options.included_in_allocation = |
| 458 | has_transport_seq_num || force_part_of_allocation_; |
| 459 | options.included_in_feedback = has_transport_seq_num; |
Sebastian Jansson | 30e2d6e | 2018-10-09 18:27:36 +0200 | [diff] [blame] | 460 | } |
Danil Chapovalov | f7fcaf0 | 2018-10-10 14:56:01 +0200 | [diff] [blame] | 461 | padding_packet.SetPadding(padding_bytes_in_packet); |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 462 | if (has_transport_seq_num) { |
| 463 | AddPacketToTransportFeedback(options.packet_id, padding_packet, |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 464 | pacing_info); |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 465 | } |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 466 | |
philipel | 32d0010 | 2017-02-27 02:18:46 -0800 | [diff] [blame] | 467 | if (!SendPacketToNetwork(padding_packet, options, pacing_info)) |
stefan | f116bd0 | 2015-10-27 08:29:42 -0700 | [diff] [blame] | 468 | break; |
| 469 | |
stefan@webrtc.org | 508a84b | 2013-06-17 12:53:37 +0000 | [diff] [blame] | 470 | bytes_sent += padding_bytes_in_packet; |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 471 | UpdateRtpStats(padding_packet, over_rtx, false); |
pwestin@webrtc.org | 12d97f6 | 2012-01-05 10:54:44 +0000 | [diff] [blame] | 472 | } |
pbos@webrtc.org | 72491b9 | 2014-07-10 16:24:54 +0000 | [diff] [blame] | 473 | |
stefan@webrtc.org | 508a84b | 2013-06-17 12:53:37 +0000 | [diff] [blame] | 474 | return bytes_sent; |
pwestin@webrtc.org | 12d97f6 | 2012-01-05 10:54:44 +0000 | [diff] [blame] | 475 | } |
| 476 | |
pbos@webrtc.org | d16e839 | 2014-12-19 13:49:55 +0000 | [diff] [blame] | 477 | void RTPSender::SetStorePacketsStatus(bool enable, uint16_t number_to_store) { |
Erik Språng | d2a6344 | 2019-05-03 10:58:50 -0400 | [diff] [blame] | 478 | RtpPacketHistory::StorageMode mode; |
| 479 | if (enable) { |
| 480 | mode = legacy_packet_history_storage_mode_ |
| 481 | ? RtpPacketHistory::StorageMode::kStore |
| 482 | : RtpPacketHistory::StorageMode::kStoreAndCull; |
| 483 | } else { |
| 484 | mode = RtpPacketHistory::StorageMode::kDisabled; |
| 485 | } |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 486 | packet_history_.SetStorePacketsStatus(mode, number_to_store); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 487 | } |
| 488 | |
pwestin@webrtc.org | b0061f9 | 2013-04-27 00:41:08 +0000 | [diff] [blame] | 489 | bool RTPSender::StorePackets() const { |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 490 | return packet_history_.GetStorageMode() != |
| 491 | RtpPacketHistory::StorageMode::kDisabled; |
pwestin@webrtc.org | b0061f9 | 2013-04-27 00:41:08 +0000 | [diff] [blame] | 492 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 493 | |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 494 | int32_t RTPSender::ReSendPacket(uint16_t packet_id) { |
| 495 | // Try to find packet in RTP packet history. Also verify RTT here, so that we |
| 496 | // don't retransmit too often. |
Danil Chapovalov | d264df5 | 2018-06-14 12:59:38 +0200 | [diff] [blame] | 497 | absl::optional<RtpPacketHistory::PacketState> stored_packet = |
Danil Chapovalov | 6c78ff4 | 2018-10-16 11:01:05 +0200 | [diff] [blame] | 498 | packet_history_.GetPacketState(packet_id); |
Erik Språng | 0f4f055 | 2019-05-08 10:15:05 -0700 | [diff] [blame] | 499 | if (!stored_packet || stored_packet->pending_transmission) { |
| 500 | // Packet not found or already queued for retransmission, ignore. |
asapersson@webrtc.org | 83ed0a4 | 2012-04-23 12:43:05 +0000 | [diff] [blame] | 501 | return 0; |
pwestin@webrtc.org | 8281e7d | 2012-01-10 14:09:18 +0000 | [diff] [blame] | 502 | } |
Oleh Prypin | 5a98049 | 2018-03-09 12:27:24 +0000 | [diff] [blame] | 503 | |
Per Kjellander | 252725d | 2019-02-20 13:14:34 +0100 | [diff] [blame] | 504 | const int32_t packet_size = static_cast<int32_t>(stored_packet->packet_size); |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 505 | |
Danil Chapovalov | c7fff58 | 2018-09-11 14:28:19 +0200 | [diff] [blame] | 506 | // Skip retransmission rate check if not configured. |
| 507 | if (retransmission_rate_limiter_) { |
Danil Chapovalov | c7fff58 | 2018-09-11 14:28:19 +0200 | [diff] [blame] | 508 | // Check if we're overusing retransmission bitrate. |
| 509 | // TODO(sprang): Add histograms for nack success or failure reasons. |
Ilya Nikolaevskiy | 23b2a25 | 2018-10-10 15:17:39 +0200 | [diff] [blame] | 510 | if (!retransmission_rate_limiter_->TryUseRate(packet_size)) { |
Danil Chapovalov | c7fff58 | 2018-09-11 14:28:19 +0200 | [diff] [blame] | 511 | return -1; |
| 512 | } |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 513 | } |
Erik Språng | 7bb37b8 | 2018-03-09 09:52:59 +0100 | [diff] [blame] | 514 | |
Oleh Prypin | 5a98049 | 2018-03-09 12:27:24 +0000 | [diff] [blame] | 515 | if (paced_sender_) { |
Erik Språng | 0f4f055 | 2019-05-08 10:15:05 -0700 | [diff] [blame] | 516 | // Mark packet as being in pacer queue again, to prevent duplicates. |
| 517 | if (!packet_history_.SetPendingTransmission(packet_id)) { |
| 518 | // Packet has already been removed from history, return early. |
| 519 | return 0; |
| 520 | } |
| 521 | |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 522 | paced_sender_->InsertPacket( |
| 523 | RtpPacketSender::kNormalPriority, stored_packet->ssrc, |
Erik Språng | 83afeeb | 2019-05-14 15:57:19 +0200 | [diff] [blame] | 524 | stored_packet->rtp_sequence_number, stored_packet->capture_time_ms, |
Per Kjellander | 252725d | 2019-02-20 13:14:34 +0100 | [diff] [blame] | 525 | stored_packet->packet_size, true); |
Oleh Prypin | 5a98049 | 2018-03-09 12:27:24 +0000 | [diff] [blame] | 526 | |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 527 | return packet_size; |
Oleh Prypin | 5a98049 | 2018-03-09 12:27:24 +0000 | [diff] [blame] | 528 | } |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 529 | |
| 530 | std::unique_ptr<RtpPacketToSend> packet = |
Danil Chapovalov | 6c78ff4 | 2018-10-16 11:01:05 +0200 | [diff] [blame] | 531 | packet_history_.GetPacketAndSetSendTime(packet_id); |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 532 | if (!packet) { |
| 533 | // Packet could theoretically time out between the first check and this one. |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | const bool rtx = (RtxStatus() & kRtxRetransmitted) > 0; |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 538 | if (!PrepareAndSendPacket(std::move(packet), rtx, true, PacedPacketInfo())) |
sprang | 867fb52 | 2015-08-03 04:38:41 -0700 | [diff] [blame] | 539 | return -1; |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 540 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 541 | return packet_size; |
pwestin@webrtc.org | 8281e7d | 2012-01-10 14:09:18 +0000 | [diff] [blame] | 542 | } |
| 543 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 544 | bool RTPSender::SendPacketToNetwork(const RtpPacketToSend& packet, |
philipel | 32d0010 | 2017-02-27 02:18:46 -0800 | [diff] [blame] | 545 | const PacketOptions& options, |
| 546 | const PacedPacketInfo& pacing_info) { |
pwestin@webrtc.org | b0061f9 | 2013-04-27 00:41:08 +0000 | [diff] [blame] | 547 | int bytes_sent = -1; |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 548 | if (transport_) { |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 549 | UpdateRtpOverhead(packet); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 550 | bytes_sent = transport_->SendRtp(packet.data(), packet.size(), options) |
| 551 | ? static_cast<int>(packet.size()) |
stefan | 1d8a506 | 2015-10-02 03:39:33 -0700 | [diff] [blame] | 552 | : -1; |
terelius | 429c345 | 2016-01-21 05:42:04 -0800 | [diff] [blame] | 553 | if (event_log_ && bytes_sent > 0) { |
Karl Wiberg | 918f50c | 2018-07-05 11:40:33 +0200 | [diff] [blame] | 554 | event_log_->Log(absl::make_unique<RtcEventRtpPacketOutgoing>( |
Elad Alon | 4a87e1c | 2017-10-03 16:11:34 +0200 | [diff] [blame] | 555 | packet, pacing_info.probe_cluster_id)); |
terelius | 429c345 | 2016-01-21 05:42:04 -0800 | [diff] [blame] | 556 | } |
pwestin@webrtc.org | 8281e7d | 2012-01-10 14:09:18 +0000 | [diff] [blame] | 557 | } |
andresp@webrtc.org | dc80bae | 2014-04-08 11:06:12 +0000 | [diff] [blame] | 558 | // TODO(pwestin): Add a separate bitrate for sent bitrate after pacer. |
asapersson@webrtc.org | 0b3c35a | 2012-01-16 11:06:31 +0000 | [diff] [blame] | 559 | if (bytes_sent <= 0) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 560 | RTC_LOG(LS_WARNING) << "Transport failed to send packet."; |
pwestin@webrtc.org | b0061f9 | 2013-04-27 00:41:08 +0000 | [diff] [blame] | 561 | return false; |
pwestin@webrtc.org | 8281e7d | 2012-01-10 14:09:18 +0000 | [diff] [blame] | 562 | } |
pwestin@webrtc.org | b0061f9 | 2013-04-27 00:41:08 +0000 | [diff] [blame] | 563 | return true; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 564 | } |
| 565 | |
Danil Chapovalov | 2800d74 | 2016-08-26 18:48:46 +0200 | [diff] [blame] | 566 | void RTPSender::OnReceivedNack( |
| 567 | const std::vector<uint16_t>& nack_sequence_numbers, |
| 568 | int64_t avg_rtt) { |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 569 | packet_history_.SetRtt(5 + avg_rtt); |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 570 | for (uint16_t seq_no : nack_sequence_numbers) { |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 571 | const int32_t bytes_sent = ReSendPacket(seq_no); |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 572 | if (bytes_sent < 0) { |
pwestin@webrtc.org | 8281e7d | 2012-01-10 14:09:18 +0000 | [diff] [blame] | 573 | // Failed to send one Sequence number. Give up the rest in this nack. |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 574 | RTC_LOG(LS_WARNING) << "Failed resending RTP packet " << seq_no |
| 575 | << ", Discard rest of packets."; |
pwestin@webrtc.org | 8281e7d | 2012-01-10 14:09:18 +0000 | [diff] [blame] | 576 | break; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 577 | } |
pwestin@webrtc.org | 8281e7d | 2012-01-10 14:09:18 +0000 | [diff] [blame] | 578 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 579 | } |
| 580 | |
pwestin@webrtc.org | b0061f9 | 2013-04-27 00:41:08 +0000 | [diff] [blame] | 581 | // Called from pacer when we can send the packet. |
Erik Språng | d287962 | 2019-05-10 08:29:01 -0700 | [diff] [blame] | 582 | RtpPacketSendResult RTPSender::TimeToSendPacket( |
| 583 | uint32_t ssrc, |
| 584 | uint16_t sequence_number, |
| 585 | int64_t capture_time_ms, |
| 586 | bool retransmission, |
| 587 | const PacedPacketInfo& pacing_info) { |
| 588 | if (!SendingMedia()) { |
| 589 | return RtpPacketSendResult::kPacketNotFound; |
| 590 | } |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 591 | |
| 592 | std::unique_ptr<RtpPacketToSend> packet; |
| 593 | if (ssrc == SSRC()) { |
Danil Chapovalov | 6c78ff4 | 2018-10-16 11:01:05 +0200 | [diff] [blame] | 594 | packet = packet_history_.GetPacketAndSetSendTime(sequence_number); |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 595 | } else if (ssrc == FlexfecSsrc()) { |
Danil Chapovalov | 6c78ff4 | 2018-10-16 11:01:05 +0200 | [diff] [blame] | 596 | packet = flexfec_packet_history_.GetPacketAndSetSendTime(sequence_number); |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 597 | } |
| 598 | |
Stefan Holmer | a246cfb | 2016-08-23 17:51:42 +0200 | [diff] [blame] | 599 | if (!packet) { |
Erik Språng | d287962 | 2019-05-10 08:29:01 -0700 | [diff] [blame] | 600 | // Packet cannot be found or was resent too recently. |
| 601 | return RtpPacketSendResult::kPacketNotFound; |
Stefan Holmer | a246cfb | 2016-08-23 17:51:42 +0200 | [diff] [blame] | 602 | } |
asapersson | 35151f3 | 2016-05-02 23:44:01 -0700 | [diff] [blame] | 603 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 604 | return PrepareAndSendPacket( |
Erik Språng | d287962 | 2019-05-10 08:29:01 -0700 | [diff] [blame] | 605 | std::move(packet), |
| 606 | retransmission && (RtxStatus() & kRtxRetransmitted) > 0, |
| 607 | retransmission, pacing_info) |
| 608 | ? RtpPacketSendResult::kSuccess |
| 609 | : RtpPacketSendResult::kTransportUnavailable; |
stefan@webrtc.org | 7e9315b | 2013-12-04 10:24:26 +0000 | [diff] [blame] | 610 | } |
asapersson@webrtc.org | 0b3c35a | 2012-01-16 11:06:31 +0000 | [diff] [blame] | 611 | |
Erik Språng | 9c771c2 | 2019-06-17 16:31:53 +0200 | [diff] [blame] | 612 | // Called from pacer when we can send the packet. |
| 613 | bool RTPSender::TrySendPacket(RtpPacketToSend* packet, |
| 614 | const PacedPacketInfo& pacing_info) { |
| 615 | RTC_DCHECK(packet); |
| 616 | |
| 617 | const uint32_t packet_ssrc = packet->Ssrc(); |
| 618 | const auto packet_type = packet->packet_type(); |
| 619 | RTC_DCHECK(packet_type.has_value()); |
| 620 | |
| 621 | PacketOptions options; |
| 622 | bool is_media = false; |
| 623 | bool is_rtx = false; |
| 624 | { |
| 625 | rtc::CritScope lock(&send_critsect_); |
| 626 | if (!sending_media_) { |
| 627 | return false; |
| 628 | } |
| 629 | |
| 630 | switch (*packet_type) { |
| 631 | case RtpPacketToSend::Type::kAudio: |
| 632 | case RtpPacketToSend::Type::kVideo: |
| 633 | if (packet_ssrc != ssrc_) { |
| 634 | return false; |
| 635 | } |
| 636 | is_media = true; |
| 637 | break; |
| 638 | case RtpPacketToSend::Type::kRetransmission: |
| 639 | case RtpPacketToSend::Type::kPadding: |
| 640 | // Both padding and retransmission must be on either the media or the |
| 641 | // RTX stream. |
| 642 | if (packet_ssrc == ssrc_rtx_) { |
| 643 | is_rtx = true; |
| 644 | } else if (packet_ssrc != ssrc_) { |
| 645 | return false; |
| 646 | } |
| 647 | break; |
| 648 | case RtpPacketToSend::Type::kForwardErrorCorrection: |
| 649 | // FlexFEC is on separate SSRC, ULPFEC uses media SSRC. |
| 650 | if (packet_ssrc != ssrc_ && packet_ssrc != flexfec_ssrc_) { |
| 651 | return false; |
| 652 | } |
| 653 | break; |
| 654 | } |
| 655 | |
| 656 | options.included_in_allocation = force_part_of_allocation_; |
| 657 | } |
| 658 | |
| 659 | // Bug webrtc:7859. While FEC is invoked from rtp_sender_video, and not after |
| 660 | // the pacer, these modifications of the header below are happening after the |
| 661 | // FEC protection packets are calculated. This will corrupt recovered packets |
| 662 | // at the same place. It's not an issue for extensions, which are present in |
| 663 | // all the packets (their content just may be incorrect on recovered packets). |
| 664 | // In case of VideoTimingExtension, since it's present not in every packet, |
| 665 | // data after rtp header may be corrupted if these packets are protected by |
| 666 | // the FEC. |
| 667 | int64_t now_ms = clock_->TimeInMilliseconds(); |
| 668 | int64_t diff_ms = now_ms - packet->capture_time_ms(); |
| 669 | packet->SetExtension<TransmissionOffset>(kTimestampTicksPerMs * diff_ms); |
| 670 | packet->SetExtension<AbsoluteSendTime>(AbsoluteSendTime::MsTo24Bits(now_ms)); |
| 671 | |
| 672 | if (packet->HasExtension<VideoTimingExtension>()) { |
| 673 | if (populate_network2_timestamp_) { |
| 674 | packet->set_network2_time_ms(now_ms); |
| 675 | } else { |
| 676 | packet->set_pacer_exit_time_ms(now_ms); |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | // Downstream code actually uses this flag to distinguish between media and |
| 681 | // everything else. |
| 682 | options.is_retransmit = !is_media; |
| 683 | if (auto packet_id = packet->GetExtension<TransportSequenceNumber>()) { |
| 684 | options.packet_id = *packet_id; |
| 685 | options.included_in_feedback = true; |
| 686 | options.included_in_allocation = true; |
| 687 | AddPacketToTransportFeedback(*packet_id, *packet, pacing_info); |
| 688 | } |
| 689 | |
| 690 | options.application_data.assign(packet->application_data().begin(), |
| 691 | packet->application_data().end()); |
| 692 | |
| 693 | if (packet->packet_type() != RtpPacketToSend::Type::kPadding && |
| 694 | packet->packet_type() != RtpPacketToSend::Type::kRetransmission) { |
| 695 | UpdateDelayStatistics(packet->capture_time_ms(), now_ms, packet_ssrc); |
| 696 | UpdateOnSendPacket(options.packet_id, packet->capture_time_ms(), |
| 697 | packet_ssrc); |
| 698 | } |
| 699 | |
| 700 | const bool send_success = SendPacketToNetwork(*packet, options, pacing_info); |
| 701 | |
| 702 | // Put packet in retransmission history or update pending status even if |
| 703 | // actual sending fails. |
| 704 | if (is_media && packet->allow_retransmission()) { |
| 705 | packet_history_.PutRtpPacket(absl::make_unique<RtpPacketToSend>(*packet), |
| 706 | StorageType::kAllowRetransmission, now_ms); |
| 707 | } else if (packet->retransmitted_sequence_number()) { |
| 708 | packet_history_.MarkPacketAsSent(*packet->retransmitted_sequence_number()); |
| 709 | } |
| 710 | |
| 711 | if (send_success) { |
| 712 | UpdateRtpStats(*packet, is_rtx, |
| 713 | packet_type == RtpPacketToSend::Type::kRetransmission); |
| 714 | |
| 715 | rtc::CritScope lock(&send_critsect_); |
| 716 | media_has_been_sent_ = true; |
| 717 | } |
| 718 | |
| 719 | // Return true even if transport failed (will be handled by retransmissions |
| 720 | // instead in that case), so that PacketRouter does not have to iterate over |
| 721 | // all other RTP modules and fail to send there too. |
| 722 | return true; |
| 723 | } |
| 724 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 725 | bool RTPSender::PrepareAndSendPacket(std::unique_ptr<RtpPacketToSend> packet, |
stefan@webrtc.org | 7c6ff2d | 2014-03-19 18:14:52 +0000 | [diff] [blame] | 726 | bool send_over_rtx, |
philipel | a1ed0b3 | 2016-06-01 06:31:17 -0700 | [diff] [blame] | 727 | bool is_retransmit, |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 728 | const PacedPacketInfo& pacing_info) { |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 729 | RTC_DCHECK(packet); |
| 730 | int64_t capture_time_ms = packet->capture_time_ms(); |
| 731 | RtpPacketToSend* packet_to_send = packet.get(); |
stefan@webrtc.org | 7e9315b | 2013-12-04 10:24:26 +0000 | [diff] [blame] | 732 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 733 | std::unique_ptr<RtpPacketToSend> packet_rtx; |
stefan@webrtc.org | 7e9315b | 2013-12-04 10:24:26 +0000 | [diff] [blame] | 734 | if (send_over_rtx) { |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 735 | packet_rtx = BuildRtxPacket(*packet); |
| 736 | if (!packet_rtx) |
danilchap | 32cd2c4 | 2016-08-01 06:58:34 -0700 | [diff] [blame] | 737 | return false; |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 738 | packet_to_send = packet_rtx.get(); |
stefan@webrtc.org | 9b82f5a | 2013-11-13 15:29:21 +0000 | [diff] [blame] | 739 | } |
| 740 | |
ilnik | 1089499 | 2017-06-21 08:23:19 -0700 | [diff] [blame] | 741 | // Bug webrtc:7859. While FEC is invoked from rtp_sender_video, and not after |
| 742 | // the pacer, these modifications of the header below are happening after the |
| 743 | // FEC protection packets are calculated. This will corrupt recovered packets |
| 744 | // at the same place. It's not an issue for extensions, which are present in |
| 745 | // all the packets (their content just may be incorrect on recovered packets). |
| 746 | // In case of VideoTimingExtension, since it's present not in every packet, |
| 747 | // data after rtp header may be corrupted if these packets are protected by |
| 748 | // the FEC. |
solenberg@webrtc.org | 7ebbea1 | 2013-05-16 11:10:31 +0000 | [diff] [blame] | 749 | int64_t now_ms = clock_->TimeInMilliseconds(); |
| 750 | int64_t diff_ms = now_ms - capture_time_ms; |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 751 | packet_to_send->SetExtension<TransmissionOffset>(kTimestampTicksPerMs * |
| 752 | diff_ms); |
Danil Chapovalov | f3ba648 | 2017-06-12 15:43:55 +0200 | [diff] [blame] | 753 | packet_to_send->SetExtension<AbsoluteSendTime>( |
| 754 | AbsoluteSendTime::MsTo24Bits(now_ms)); |
sprang | 867fb52 | 2015-08-03 04:38:41 -0700 | [diff] [blame] | 755 | |
Erik Språng | 7b52f10 | 2018-02-07 14:37:37 +0100 | [diff] [blame] | 756 | if (packet_to_send->HasExtension<VideoTimingExtension>()) { |
| 757 | if (populate_network2_timestamp_) { |
| 758 | packet_to_send->set_network2_time_ms(now_ms); |
| 759 | } else { |
| 760 | packet_to_send->set_pacer_exit_time_ms(now_ms); |
| 761 | } |
| 762 | } |
ilnik | 04f4d12 | 2017-06-19 07:18:55 -0700 | [diff] [blame] | 763 | |
stefan | 1d8a506 | 2015-10-02 03:39:33 -0700 | [diff] [blame] | 764 | PacketOptions options; |
Petter Strandmark | 26bc669 | 2018-05-29 08:43:35 +0200 | [diff] [blame] | 765 | // If we are sending over RTX, it also means this is a retransmission. |
| 766 | // E.g. RTPSender::TrySendRedundantPayloads calls PrepareAndSendPacket with |
| 767 | // send_over_rtx = true but is_retransmit = false. |
| 768 | options.is_retransmit = is_retransmit || send_over_rtx; |
Sebastian Jansson | 30e2d6e | 2018-10-09 18:27:36 +0200 | [diff] [blame] | 769 | bool has_transport_seq_num; |
| 770 | { |
| 771 | rtc::CritScope lock(&send_critsect_); |
| 772 | has_transport_seq_num = |
| 773 | UpdateTransportSequenceNumber(packet_to_send, &options.packet_id); |
Sebastian Jansson | 1bca65b | 2018-10-10 09:58:08 +0200 | [diff] [blame] | 774 | options.included_in_allocation = |
| 775 | has_transport_seq_num || force_part_of_allocation_; |
| 776 | options.included_in_feedback = has_transport_seq_num; |
Sebastian Jansson | 30e2d6e | 2018-10-09 18:27:36 +0200 | [diff] [blame] | 777 | } |
| 778 | if (has_transport_seq_num) { |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 779 | AddPacketToTransportFeedback(options.packet_id, *packet_to_send, |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 780 | pacing_info); |
sprang | 867fb52 | 2015-08-03 04:38:41 -0700 | [diff] [blame] | 781 | } |
Dino Radaković | 1807d57 | 2018-02-22 14:18:06 +0100 | [diff] [blame] | 782 | options.application_data.assign(packet_to_send->application_data().begin(), |
| 783 | packet_to_send->application_data().end()); |
sprang | 867fb52 | 2015-08-03 04:38:41 -0700 | [diff] [blame] | 784 | |
asapersson | 35151f3 | 2016-05-02 23:44:01 -0700 | [diff] [blame] | 785 | if (!is_retransmit && !send_over_rtx) { |
Erik Språng | 9c771c2 | 2019-06-17 16:31:53 +0200 | [diff] [blame] | 786 | UpdateDelayStatistics(packet->capture_time_ms(), now_ms, packet->Ssrc()); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 787 | UpdateOnSendPacket(options.packet_id, packet->capture_time_ms(), |
| 788 | packet->Ssrc()); |
stefan | f116bd0 | 2015-10-27 08:29:42 -0700 | [diff] [blame] | 789 | } |
| 790 | |
philipel | 32d0010 | 2017-02-27 02:18:46 -0800 | [diff] [blame] | 791 | if (!SendPacketToNetwork(*packet_to_send, options, pacing_info)) |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 792 | return false; |
| 793 | |
| 794 | { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 795 | rtc::CritScope lock(&send_critsect_); |
stefan@webrtc.org | 8b94e3d | 2014-07-17 16:10:14 +0000 | [diff] [blame] | 796 | media_has_been_sent_ = true; |
| 797 | } |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 798 | UpdateRtpStats(*packet_to_send, send_over_rtx, is_retransmit); |
| 799 | return true; |
sprang@webrtc.org | ebad765 | 2013-12-05 14:29:02 +0000 | [diff] [blame] | 800 | } |
| 801 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 802 | void RTPSender::UpdateRtpStats(const RtpPacketToSend& packet, |
sprang@webrtc.org | ebad765 | 2013-12-05 14:29:02 +0000 | [diff] [blame] | 803 | bool is_rtx, |
| 804 | bool is_retransmit) { |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 805 | int64_t now_ms = clock_->TimeInMilliseconds(); |
sprang@webrtc.org | 5314e85 | 2014-01-27 13:20:36 +0000 | [diff] [blame] | 806 | |
danilchap | 7c9426c | 2016-04-14 03:05:31 -0700 | [diff] [blame] | 807 | rtc::CritScope lock(&statistics_crit_); |
Danil Chapovalov | d69e526 | 2016-09-20 15:48:09 +0200 | [diff] [blame] | 808 | StreamDataCounters* counters = is_rtx ? &rtx_rtp_stats_ : &rtp_stats_; |
sprang@webrtc.org | ebad765 | 2013-12-05 14:29:02 +0000 | [diff] [blame] | 809 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 810 | total_bitrate_sent_.Update(packet.size(), now_ms); |
asapersson@webrtc.org | 4414939 | 2015-02-04 08:34:47 +0000 | [diff] [blame] | 811 | |
Danil Chapovalov | d69e526 | 2016-09-20 15:48:09 +0200 | [diff] [blame] | 812 | if (counters->first_packet_time_ms == -1) |
| 813 | counters->first_packet_time_ms = now_ms; |
| 814 | |
Erik Språng | f53cfa9 | 2019-06-12 13:58:17 +0200 | [diff] [blame] | 815 | if (packet.packet_type() == RtpPacketToSend::Type::kForwardErrorCorrection) { |
Niels Möller | dbb988b | 2018-11-15 08:05:16 +0100 | [diff] [blame] | 816 | counters->fec.AddPacket(packet); |
Erik Språng | f53cfa9 | 2019-06-12 13:58:17 +0200 | [diff] [blame] | 817 | } |
Danil Chapovalov | d69e526 | 2016-09-20 15:48:09 +0200 | [diff] [blame] | 818 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 819 | if (is_retransmit) { |
Niels Möller | dbb988b | 2018-11-15 08:05:16 +0100 | [diff] [blame] | 820 | counters->retransmitted.AddPacket(packet); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 821 | nack_bitrate_sent_.Update(packet.size(), now_ms); |
| 822 | } |
Niels Möller | dbb988b | 2018-11-15 08:05:16 +0100 | [diff] [blame] | 823 | counters->transmitted.AddPacket(packet); |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 824 | |
Danil Chapovalov | d69e526 | 2016-09-20 15:48:09 +0200 | [diff] [blame] | 825 | if (rtp_stats_callback_) |
| 826 | rtp_stats_callback_->DataCountersUpdated(*counters, packet.Ssrc()); |
sprang@webrtc.org | ebad765 | 2013-12-05 14:29:02 +0000 | [diff] [blame] | 827 | } |
| 828 | |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 829 | size_t RTPSender::TimeToSendPadding(size_t bytes, |
| 830 | const PacedPacketInfo& pacing_info) { |
stefan | 53b6cc3 | 2017-02-03 08:13:57 -0800 | [diff] [blame] | 831 | if (bytes == 0) |
pbos | 545727e | 2015-07-01 06:31:06 -0700 | [diff] [blame] | 832 | return 0; |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 833 | size_t bytes_sent = TrySendRedundantPayloads(bytes, pacing_info); |
pkasting@chromium.org | 4591fbd | 2014-11-20 22:28:14 +0000 | [diff] [blame] | 834 | if (bytes_sent < bytes) |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 835 | bytes_sent += SendPadData(bytes - bytes_sent, pacing_info); |
pkasting@chromium.org | 4591fbd | 2014-11-20 22:28:14 +0000 | [diff] [blame] | 836 | return bytes_sent; |
stefan@webrtc.org | 508a84b | 2013-06-17 12:53:37 +0000 | [diff] [blame] | 837 | } |
| 838 | |
Erik Språng | 478cb46 | 2019-06-26 15:49:27 +0200 | [diff] [blame] | 839 | void RTPSender::GeneratePadding(size_t target_size_bytes) { |
| 840 | // This method does not actually send packets, it just generates |
| 841 | // them and puts them in the pacer queue. Since this should incur |
| 842 | // low overhead, keep the lock for the scope of the method in order |
| 843 | // to make the code more readable. |
| 844 | rtc::CritScope lock(&send_critsect_); |
| 845 | if (!sending_media_) |
| 846 | return; |
| 847 | |
| 848 | size_t bytes_left = target_size_bytes; |
| 849 | if ((rtx_ & kRtxRedundantPayloads) != 0) { |
| 850 | while (bytes_left >= 0) { |
| 851 | std::unique_ptr<RtpPacketToSend> packet = |
| 852 | packet_history_.GetPayloadPaddingPacket( |
| 853 | [&](const RtpPacketToSend& packet) |
| 854 | -> std::unique_ptr<RtpPacketToSend> { |
| 855 | if (packet.payload_size() + kRtxHeaderSize > bytes_left) { |
| 856 | return nullptr; |
| 857 | } |
| 858 | return BuildRtxPacket(packet); |
| 859 | }); |
| 860 | if (!packet) { |
| 861 | break; |
| 862 | } |
| 863 | |
| 864 | bytes_left -= std::min(bytes_left, packet->payload_size()); |
| 865 | packet->set_packet_type(RtpPacketToSend::Type::kPadding); |
| 866 | paced_sender_->EnqueuePacket(std::move(packet)); |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | size_t padding_bytes_in_packet; |
| 871 | const size_t max_payload_size = max_packet_size_ - RtpHeaderLength(); |
| 872 | if (audio_configured_) { |
| 873 | // Allow smaller padding packets for audio. |
| 874 | padding_bytes_in_packet = rtc::SafeClamp<size_t>( |
| 875 | bytes_left, kMinAudioPaddingLength, |
| 876 | rtc::SafeMin(max_payload_size, kMaxPaddingLength)); |
| 877 | } else { |
| 878 | // Always send full padding packets. This is accounted for by the |
| 879 | // RtpPacketSender, which will make sure we don't send too much padding even |
| 880 | // if a single packet is larger than requested. |
| 881 | // We do this to avoid frequently sending small packets on higher bitrates. |
| 882 | padding_bytes_in_packet = rtc::SafeMin(max_payload_size, kMaxPaddingLength); |
| 883 | } |
| 884 | |
| 885 | while (bytes_left > 0) { |
| 886 | auto padding_packet = |
| 887 | absl::make_unique<RtpPacketToSend>(&rtp_header_extension_map_); |
| 888 | padding_packet->set_packet_type(RtpPacketToSend::Type::kPadding); |
| 889 | padding_packet->SetMarker(false); |
| 890 | padding_packet->SetTimestamp(last_rtp_timestamp_); |
| 891 | padding_packet->set_capture_time_ms(capture_time_ms_); |
| 892 | if (rtx_ == kRtxOff) { |
| 893 | if (last_payload_type_ == -1) { |
| 894 | break; |
| 895 | } |
| 896 | // Without RTX we can't send padding in the middle of frames. |
| 897 | // For audio marker bits doesn't mark the end of a frame and frames |
| 898 | // are usually a single packet, so for now we don't apply this rule |
| 899 | // for audio. |
| 900 | if (!audio_configured_ && !last_packet_marker_bit_) { |
| 901 | break; |
| 902 | } |
| 903 | |
| 904 | RTC_DCHECK(ssrc_); |
| 905 | padding_packet->SetSsrc(*ssrc_); |
| 906 | padding_packet->SetPayloadType(last_payload_type_); |
| 907 | padding_packet->SetSequenceNumber(sequence_number_++); |
| 908 | } else { |
| 909 | // Without abs-send-time or transport sequence number a media packet |
| 910 | // must be sent before padding so that the timestamps used for |
| 911 | // estimation are correct. |
| 912 | if (!media_has_been_sent_ && |
| 913 | !(rtp_header_extension_map_.IsRegistered(AbsoluteSendTime::kId) || |
| 914 | rtp_header_extension_map_.IsRegistered( |
| 915 | TransportSequenceNumber::kId))) { |
| 916 | break; |
| 917 | } |
| 918 | // Only change the timestamp of padding packets sent over RTX. |
| 919 | // Padding only packets over RTP has to be sent as part of a media |
| 920 | // frame (and therefore the same timestamp). |
| 921 | int64_t now_ms = clock_->TimeInMilliseconds(); |
| 922 | if (last_timestamp_time_ms_ > 0) { |
| 923 | padding_packet->SetTimestamp(padding_packet->Timestamp() + |
| 924 | (now_ms - last_timestamp_time_ms_) * |
| 925 | kTimestampTicksPerMs); |
| 926 | padding_packet->set_capture_time_ms(padding_packet->capture_time_ms() + |
| 927 | (now_ms - last_timestamp_time_ms_)); |
| 928 | } |
| 929 | RTC_DCHECK(ssrc_rtx_); |
| 930 | padding_packet->SetSsrc(*ssrc_rtx_); |
| 931 | padding_packet->SetSequenceNumber(sequence_number_rtx_++); |
| 932 | padding_packet->SetPayloadType(rtx_payload_type_map_.begin()->second); |
| 933 | } |
| 934 | |
| 935 | padding_packet->SetPadding(padding_bytes_in_packet); |
| 936 | bytes_left -= std::min(bytes_left, padding_bytes_in_packet); |
| 937 | paced_sender_->EnqueuePacket(std::move(padding_packet)); |
| 938 | } |
| 939 | } |
| 940 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 941 | bool RTPSender::SendToNetwork(std::unique_ptr<RtpPacketToSend> packet, |
Erik Språng | 13eb764 | 2019-06-24 10:58:48 +0200 | [diff] [blame] | 942 | StorageType storage) { |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 943 | RTC_DCHECK(packet); |
solenberg@webrtc.org | 7ebbea1 | 2013-05-16 11:10:31 +0000 | [diff] [blame] | 944 | int64_t now_ms = clock_->TimeInMilliseconds(); |
| 945 | |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 946 | uint32_t ssrc = packet->Ssrc(); |
Peter Boström | e23e737 | 2015-10-08 11:44:14 +0200 | [diff] [blame] | 947 | if (paced_sender_) { |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 948 | uint16_t seq_no = packet->SequenceNumber(); |
Erik Språng | 83afeeb | 2019-05-14 15:57:19 +0200 | [diff] [blame] | 949 | int64_t capture_time_ms = packet->capture_time_ms(); |
Per Kjellander | 17c147c | 2019-02-20 12:06:17 +0100 | [diff] [blame] | 950 | size_t packet_size = |
| 951 | send_side_bwe_with_overhead_ ? packet->size() : packet->payload_size(); |
Erik Språng | 13eb764 | 2019-06-24 10:58:48 +0200 | [diff] [blame] | 952 | auto packet_type = packet->packet_type(); |
| 953 | RTC_DCHECK(packet_type.has_value()); |
Niels Möller | 59ab1cf | 2019-02-06 22:48:11 +0100 | [diff] [blame] | 954 | if (ssrc == FlexfecSsrc()) { |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 955 | // Store FlexFEC packets in the history here, so they can be found |
| 956 | // when the pacer calls TimeToSendPacket. |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 957 | flexfec_packet_history_.PutRtpPacket(std::move(packet), storage, |
Danil Chapovalov | d264df5 | 2018-06-14 12:59:38 +0200 | [diff] [blame] | 958 | absl::nullopt); |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 959 | } else { |
Danil Chapovalov | d264df5 | 2018-06-14 12:59:38 +0200 | [diff] [blame] | 960 | packet_history_.PutRtpPacket(std::move(packet), storage, absl::nullopt); |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 961 | } |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 962 | |
Erik Språng | 13eb764 | 2019-06-24 10:58:48 +0200 | [diff] [blame] | 963 | paced_sender_->InsertPacket(PacketTypeToPriority(*packet_type), ssrc, |
| 964 | seq_no, capture_time_ms, packet_size, false); |
Sergey Ulanov | 525df3f | 2016-08-02 17:46:41 -0700 | [diff] [blame] | 965 | return true; |
stefan@webrtc.org | ddfdfed | 2012-07-03 13:21:22 +0000 | [diff] [blame] | 966 | } |
Stefan Holmer | f5dca48 | 2016-01-27 12:58:51 +0100 | [diff] [blame] | 967 | |
| 968 | PacketOptions options; |
Petter Strandmark | 26bc669 | 2018-05-29 08:43:35 +0200 | [diff] [blame] | 969 | options.is_retransmit = false; |
Sebastian Jansson | 30e2d6e | 2018-10-09 18:27:36 +0200 | [diff] [blame] | 970 | |
Danil Chapovalov | af52b68 | 2018-11-27 10:48:27 +0100 | [diff] [blame] | 971 | // |capture_time_ms| <= 0 is considered invalid. |
| 972 | // TODO(holmer): This should be changed all over Video Engine so that negative |
| 973 | // time is consider invalid, while 0 is considered a valid time. |
| 974 | if (packet->capture_time_ms() > 0) { |
| 975 | packet->SetExtension<TransmissionOffset>( |
| 976 | kTimestampTicksPerMs * (now_ms - packet->capture_time_ms())); |
| 977 | |
| 978 | if (populate_network2_timestamp_ && |
| 979 | packet->HasExtension<VideoTimingExtension>()) { |
| 980 | packet->set_network2_time_ms(now_ms); |
| 981 | } |
| 982 | } |
| 983 | packet->SetExtension<AbsoluteSendTime>(AbsoluteSendTime::MsTo24Bits(now_ms)); |
| 984 | |
Sebastian Jansson | 30e2d6e | 2018-10-09 18:27:36 +0200 | [diff] [blame] | 985 | bool has_transport_seq_num; |
| 986 | { |
| 987 | rtc::CritScope lock(&send_critsect_); |
| 988 | has_transport_seq_num = |
| 989 | UpdateTransportSequenceNumber(packet.get(), &options.packet_id); |
Sebastian Jansson | 1bca65b | 2018-10-10 09:58:08 +0200 | [diff] [blame] | 990 | options.included_in_allocation = |
| 991 | has_transport_seq_num || force_part_of_allocation_; |
| 992 | options.included_in_feedback = has_transport_seq_num; |
Sebastian Jansson | 30e2d6e | 2018-10-09 18:27:36 +0200 | [diff] [blame] | 993 | } |
| 994 | if (has_transport_seq_num) { |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 995 | AddPacketToTransportFeedback(options.packet_id, *packet.get(), |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 996 | PacedPacketInfo()); |
Stefan Holmer | f5dca48 | 2016-01-27 12:58:51 +0100 | [diff] [blame] | 997 | } |
Dino Radaković | 1807d57 | 2018-02-22 14:18:06 +0100 | [diff] [blame] | 998 | options.application_data.assign(packet->application_data().begin(), |
| 999 | packet->application_data().end()); |
Stefan Holmer | f5dca48 | 2016-01-27 12:58:51 +0100 | [diff] [blame] | 1000 | |
Erik Språng | 9c771c2 | 2019-06-17 16:31:53 +0200 | [diff] [blame] | 1001 | UpdateDelayStatistics(packet->capture_time_ms(), now_ms, packet->Ssrc()); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1002 | UpdateOnSendPacket(options.packet_id, packet->capture_time_ms(), |
| 1003 | packet->Ssrc()); |
| 1004 | |
philipel | 32d0010 | 2017-02-27 02:18:46 -0800 | [diff] [blame] | 1005 | bool sent = SendPacketToNetwork(*packet, options, PacedPacketInfo()); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1006 | |
| 1007 | if (sent) { |
| 1008 | { |
| 1009 | rtc::CritScope lock(&send_critsect_); |
| 1010 | media_has_been_sent_ = true; |
| 1011 | } |
| 1012 | UpdateRtpStats(*packet, false, false); |
| 1013 | } |
sprang@webrtc.org | c957ffc | 2015-02-02 13:08:02 +0000 | [diff] [blame] | 1014 | |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 1015 | // To support retransmissions, we store the media packet as sent in the |
| 1016 | // packet history (even if send failed). |
| 1017 | if (storage == kAllowRetransmission) { |
Danil Chapovalov | 603ce98 | 2017-12-27 11:32:50 +0100 | [diff] [blame] | 1018 | RTC_DCHECK_EQ(ssrc, SSRC()); |
Erik Språng | a12b1d6 | 2018-03-14 12:39:24 +0100 | [diff] [blame] | 1019 | packet_history_.PutRtpPacket(std::move(packet), storage, now_ms); |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 1020 | } |
Peter Boström | e23e737 | 2015-10-08 11:44:14 +0200 | [diff] [blame] | 1021 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1022 | return sent; |
stefan@webrtc.org | 6a4bef4 | 2011-12-22 12:52:41 +0000 | [diff] [blame] | 1023 | } |
| 1024 | |
Erik Språng | 13eb764 | 2019-06-24 10:58:48 +0200 | [diff] [blame] | 1025 | bool RTPSender::SendToNetwork(std::unique_ptr<RtpPacketToSend> packet, |
| 1026 | StorageType storage, |
| 1027 | RtpPacketSender::Priority priority) { |
| 1028 | packet->set_packet_type(PacketPriorityToType(priority)); |
| 1029 | return SendToNetwork(std::move(packet), storage); |
| 1030 | } |
| 1031 | |
Johannes Kron | 4a8a5e7 | 2018-09-26 09:57:48 +0200 | [diff] [blame] | 1032 | void RTPSender::RecomputeMaxSendDelay() { |
| 1033 | max_delay_it_ = send_delays_.begin(); |
| 1034 | for (auto it = send_delays_.begin(); it != send_delays_.end(); ++it) { |
| 1035 | if (it->second >= max_delay_it_->second) { |
| 1036 | max_delay_it_ = it; |
| 1037 | } |
| 1038 | } |
| 1039 | } |
| 1040 | |
Erik Språng | 9c771c2 | 2019-06-17 16:31:53 +0200 | [diff] [blame] | 1041 | void RTPSender::UpdateDelayStatistics(int64_t capture_time_ms, |
| 1042 | int64_t now_ms, |
| 1043 | uint32_t ssrc) { |
asapersson | 35151f3 | 2016-05-02 23:44:01 -0700 | [diff] [blame] | 1044 | if (!send_side_delay_observer_ || capture_time_ms <= 0) |
Peter Boström | 71861a0 | 2015-05-28 14:45:36 +0200 | [diff] [blame] | 1045 | return; |
| 1046 | |
Johannes Kron | 4a8a5e7 | 2018-09-26 09:57:48 +0200 | [diff] [blame] | 1047 | int avg_delay_ms = 0; |
stefan@webrtc.org | 168f23f | 2014-07-11 13:44:02 +0000 | [diff] [blame] | 1048 | int max_delay_ms = 0; |
Henrik Boström | 9fe1834 | 2019-05-16 18:38:20 +0200 | [diff] [blame] | 1049 | uint64_t total_packet_send_delay_ms = 0; |
stefan@webrtc.org | 168f23f | 2014-07-11 13:44:02 +0000 | [diff] [blame] | 1050 | { |
danilchap | 7c9426c | 2016-04-14 03:05:31 -0700 | [diff] [blame] | 1051 | rtc::CritScope cs(&statistics_crit_); |
Johannes Kron | 4a8a5e7 | 2018-09-26 09:57:48 +0200 | [diff] [blame] | 1052 | // Compute the max and average of the recent capture-to-send delays. |
| 1053 | // The time complexity of the current approach depends on the distribution |
| 1054 | // of the delay values. This could be done more efficiently. |
| 1055 | |
| 1056 | // Remove elements older than kSendSideDelayWindowMs. |
| 1057 | auto lower_bound = |
| 1058 | send_delays_.lower_bound(now_ms - kSendSideDelayWindowMs); |
| 1059 | for (auto it = send_delays_.begin(); it != lower_bound; ++it) { |
| 1060 | if (max_delay_it_ == it) { |
| 1061 | max_delay_it_ = send_delays_.end(); |
| 1062 | } |
| 1063 | sum_delays_ms_ -= it->second; |
| 1064 | } |
| 1065 | send_delays_.erase(send_delays_.begin(), lower_bound); |
| 1066 | if (max_delay_it_ == send_delays_.end()) { |
| 1067 | // Removed the previous max. Need to recompute. |
| 1068 | RecomputeMaxSendDelay(); |
| 1069 | } |
| 1070 | |
| 1071 | // Add the new element. |
Johannes Kron | 965e794 | 2018-09-13 15:36:20 +0200 | [diff] [blame] | 1072 | RTC_DCHECK_GE(now_ms, static_cast<int64_t>(0)); |
| 1073 | RTC_DCHECK_LE(now_ms, std::numeric_limits<int64_t>::max() / 2); |
| 1074 | RTC_DCHECK_GE(capture_time_ms, static_cast<int64_t>(0)); |
| 1075 | RTC_DCHECK_LE(capture_time_ms, std::numeric_limits<int64_t>::max() / 2); |
| 1076 | int64_t diff_ms = now_ms - capture_time_ms; |
| 1077 | RTC_DCHECK_GE(diff_ms, static_cast<int64_t>(0)); |
| 1078 | RTC_DCHECK_LE(diff_ms, |
| 1079 | static_cast<int64_t>(std::numeric_limits<int>::max())); |
Johannes Kron | 4a8a5e7 | 2018-09-26 09:57:48 +0200 | [diff] [blame] | 1080 | int new_send_delay = rtc::dchecked_cast<int>(now_ms - capture_time_ms); |
| 1081 | SendDelayMap::iterator it; |
| 1082 | bool inserted; |
| 1083 | std::tie(it, inserted) = |
| 1084 | send_delays_.insert(std::make_pair(now_ms, new_send_delay)); |
| 1085 | if (!inserted) { |
| 1086 | // TODO(terelius): If we have multiple delay measurements during the same |
| 1087 | // millisecond then we keep the most recent one. It is not clear that this |
| 1088 | // is the right decision, but it preserves an earlier behavior. |
| 1089 | int previous_send_delay = it->second; |
| 1090 | sum_delays_ms_ -= previous_send_delay; |
| 1091 | it->second = new_send_delay; |
| 1092 | if (max_delay_it_ == it && new_send_delay < previous_send_delay) { |
| 1093 | RecomputeMaxSendDelay(); |
| 1094 | } |
Peter Boström | 71861a0 | 2015-05-28 14:45:36 +0200 | [diff] [blame] | 1095 | } |
Johannes Kron | 4a8a5e7 | 2018-09-26 09:57:48 +0200 | [diff] [blame] | 1096 | if (max_delay_it_ == send_delays_.end() || |
| 1097 | it->second >= max_delay_it_->second) { |
| 1098 | max_delay_it_ = it; |
| 1099 | } |
| 1100 | sum_delays_ms_ += new_send_delay; |
Henrik Boström | 9fe1834 | 2019-05-16 18:38:20 +0200 | [diff] [blame] | 1101 | total_packet_send_delay_ms_ += new_send_delay; |
| 1102 | total_packet_send_delay_ms = total_packet_send_delay_ms_; |
Johannes Kron | 4a8a5e7 | 2018-09-26 09:57:48 +0200 | [diff] [blame] | 1103 | |
| 1104 | size_t num_delays = send_delays_.size(); |
| 1105 | RTC_DCHECK(max_delay_it_ != send_delays_.end()); |
| 1106 | max_delay_ms = rtc::dchecked_cast<int>(max_delay_it_->second); |
| 1107 | int64_t avg_ms = (sum_delays_ms_ + num_delays / 2) / num_delays; |
| 1108 | RTC_DCHECK_GE(avg_ms, static_cast<int64_t>(0)); |
| 1109 | RTC_DCHECK_LE(avg_ms, |
| 1110 | static_cast<int64_t>(std::numeric_limits<int>::max())); |
| 1111 | avg_delay_ms = |
| 1112 | rtc::dchecked_cast<int>((sum_delays_ms_ + num_delays / 2) / num_delays); |
stefan@webrtc.org | 168f23f | 2014-07-11 13:44:02 +0000 | [diff] [blame] | 1113 | } |
Henrik Boström | 9fe1834 | 2019-05-16 18:38:20 +0200 | [diff] [blame] | 1114 | send_side_delay_observer_->SendSideDelayUpdated( |
| 1115 | avg_delay_ms, max_delay_ms, total_packet_send_delay_ms, ssrc); |
stefan@webrtc.org | 0a3c147 | 2013-12-05 14:05:07 +0000 | [diff] [blame] | 1116 | } |
| 1117 | |
asapersson | 35151f3 | 2016-05-02 23:44:01 -0700 | [diff] [blame] | 1118 | void RTPSender::UpdateOnSendPacket(int packet_id, |
| 1119 | int64_t capture_time_ms, |
| 1120 | uint32_t ssrc) { |
| 1121 | if (!send_packet_observer_ || capture_time_ms <= 0 || packet_id == -1) |
| 1122 | return; |
| 1123 | |
| 1124 | send_packet_observer_->OnSendPacket(packet_id, capture_time_ms, ssrc); |
| 1125 | } |
| 1126 | |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1127 | void RTPSender::ProcessBitrate() { |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 1128 | if (!bitrate_callback_) |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1129 | return; |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 1130 | int64_t now_ms = clock_->TimeInMilliseconds(); |
| 1131 | uint32_t ssrc; |
| 1132 | { |
| 1133 | rtc::CritScope lock(&send_critsect_); |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 1134 | if (!ssrc_) |
| 1135 | return; |
| 1136 | ssrc = *ssrc_; |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1137 | } |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 1138 | |
| 1139 | rtc::CritScope lock(&statistics_crit_); |
| 1140 | bitrate_callback_->Notify(total_bitrate_sent_.Rate(now_ms).value_or(0), |
| 1141 | nack_bitrate_sent_.Rate(now_ms).value_or(0), ssrc); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1142 | } |
| 1143 | |
isheriff | 6b4b5f3 | 2016-06-08 00:24:21 -0700 | [diff] [blame] | 1144 | size_t RTPSender::RtpHeaderLength() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1145 | rtc::CritScope lock(&send_critsect_); |
guoweis@webrtc.org | 4536289 | 2015-03-04 22:55:15 +0000 | [diff] [blame] | 1146 | size_t rtp_header_length = kRtpHeaderLength; |
pbos@webrtc.org | 9334ac2 | 2014-11-24 08:25:50 +0000 | [diff] [blame] | 1147 | rtp_header_length += sizeof(uint32_t) * csrcs_.size(); |
Danil Chapovalov | 7b18992 | 2018-10-03 10:15:36 +0200 | [diff] [blame] | 1148 | rtp_header_length += RtpHeaderExtensionSize(kFecOrPaddingExtensionSizes, |
| 1149 | rtp_header_extension_map_); |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 1150 | return rtp_header_length; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1151 | } |
| 1152 | |
mflodman | fcf54bd | 2015-04-14 21:28:08 +0200 | [diff] [blame] | 1153 | uint16_t RTPSender::AllocateSequenceNumber(uint16_t packets_to_send) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1154 | rtc::CritScope lock(&send_critsect_); |
mflodman | fcf54bd | 2015-04-14 21:28:08 +0200 | [diff] [blame] | 1155 | uint16_t first_allocated_sequence_number = sequence_number_; |
| 1156 | sequence_number_ += packets_to_send; |
| 1157 | return first_allocated_sequence_number; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1158 | } |
| 1159 | |
pbos@webrtc.org | 2f4b14e | 2014-07-15 15:25:39 +0000 | [diff] [blame] | 1160 | void RTPSender::GetDataCounters(StreamDataCounters* rtp_stats, |
| 1161 | StreamDataCounters* rtx_stats) const { |
danilchap | 7c9426c | 2016-04-14 03:05:31 -0700 | [diff] [blame] | 1162 | rtc::CritScope lock(&statistics_crit_); |
pbos@webrtc.org | 2f4b14e | 2014-07-15 15:25:39 +0000 | [diff] [blame] | 1163 | *rtp_stats = rtp_stats_; |
| 1164 | *rtx_stats = rtx_rtp_stats_; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1165 | } |
| 1166 | |
Danil Chapovalov | 5e57b17 | 2016-09-02 19:15:59 +0200 | [diff] [blame] | 1167 | std::unique_ptr<RtpPacketToSend> RTPSender::AllocatePacket() const { |
| 1168 | rtc::CritScope lock(&send_critsect_); |
Danil Chapovalov | 3b4b4f5 | 2018-10-12 12:50:43 +0200 | [diff] [blame] | 1169 | // TODO(danilchap): Find better motivator and value for extra capacity. |
| 1170 | // RtpPacketizer might slightly miscalulate needed size, |
| 1171 | // SRTP may benefit from extra space in the buffer and do encryption in place |
| 1172 | // saving reallocation. |
| 1173 | // While sending slightly oversized packet increase chance of dropped packet, |
| 1174 | // it is better than crash on drop packet without trying to send it. |
| 1175 | static constexpr int kExtraCapacity = 16; |
| 1176 | auto packet = absl::make_unique<RtpPacketToSend>( |
| 1177 | &rtp_header_extension_map_, max_packet_size_ + kExtraCapacity); |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 1178 | RTC_DCHECK(ssrc_); |
| 1179 | packet->SetSsrc(*ssrc_); |
Danil Chapovalov | 5e57b17 | 2016-09-02 19:15:59 +0200 | [diff] [blame] | 1180 | packet->SetCsrcs(csrcs_); |
| 1181 | // Reserve extensions, if registered, RtpSender set in SendToNetwork. |
| 1182 | packet->ReserveExtension<AbsoluteSendTime>(); |
| 1183 | packet->ReserveExtension<TransmissionOffset>(); |
| 1184 | packet->ReserveExtension<TransportSequenceNumber>(); |
Niels Möller | 6893f3c | 2019-01-31 08:56:26 +0100 | [diff] [blame] | 1185 | |
Steve Anton | 4af9584 | 2018-04-06 11:09:46 -0700 | [diff] [blame] | 1186 | if (!mid_.empty()) { |
Steve Anton | 296a0ce | 2018-03-22 15:17:27 -0700 | [diff] [blame] | 1187 | // This is a no-op if the MID header extension is not registered. |
Steve Anton | 4af9584 | 2018-04-06 11:09:46 -0700 | [diff] [blame] | 1188 | packet->SetExtension<RtpMid>(mid_); |
Steve Anton | 296a0ce | 2018-03-22 15:17:27 -0700 | [diff] [blame] | 1189 | } |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 1190 | if (!rid_.empty()) { |
| 1191 | // This is a no-op if the RID header extension is not registered. |
| 1192 | packet->SetExtension<RtpStreamId>(rid_); |
| 1193 | } |
Danil Chapovalov | 5e57b17 | 2016-09-02 19:15:59 +0200 | [diff] [blame] | 1194 | return packet; |
| 1195 | } |
| 1196 | |
| 1197 | bool RTPSender::AssignSequenceNumber(RtpPacketToSend* packet) { |
| 1198 | rtc::CritScope lock(&send_critsect_); |
| 1199 | if (!sending_media_) |
| 1200 | return false; |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 1201 | RTC_DCHECK(packet->Ssrc() == ssrc_); |
Danil Chapovalov | 5e57b17 | 2016-09-02 19:15:59 +0200 | [diff] [blame] | 1202 | packet->SetSequenceNumber(sequence_number_++); |
| 1203 | |
| 1204 | // Remember marker bit to determine if padding can be inserted with |
| 1205 | // sequence number following |packet|. |
| 1206 | last_packet_marker_bit_ = packet->Marker(); |
Danil Chapovalov | b3179c7 | 2018-03-22 10:13:07 +0100 | [diff] [blame] | 1207 | // Remember payload type to use in the padding packet if rtx is disabled. |
| 1208 | last_payload_type_ = packet->PayloadType(); |
Danil Chapovalov | 5e57b17 | 2016-09-02 19:15:59 +0200 | [diff] [blame] | 1209 | // Save timestamps to generate timestamp field and extensions for the padding. |
| 1210 | last_rtp_timestamp_ = packet->Timestamp(); |
| 1211 | last_timestamp_time_ms_ = clock_->TimeInMilliseconds(); |
| 1212 | capture_time_ms_ = packet->capture_time_ms(); |
| 1213 | return true; |
| 1214 | } |
| 1215 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1216 | bool RTPSender::UpdateTransportSequenceNumber(RtpPacketToSend* packet, |
Sebastian Jansson | 30e2d6e | 2018-10-09 18:27:36 +0200 | [diff] [blame] | 1217 | int* packet_id) { |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1218 | RTC_DCHECK(packet); |
| 1219 | RTC_DCHECK(packet_id); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1220 | if (!rtp_header_extension_map_.IsRegistered(TransportSequenceNumber::kId)) |
stefan | a23fc62 | 2016-07-28 07:56:38 -0700 | [diff] [blame] | 1221 | return false; |
| 1222 | |
asapersson | 35151f3 | 2016-05-02 23:44:01 -0700 | [diff] [blame] | 1223 | if (!transport_sequence_number_allocator_) |
| 1224 | return false; |
| 1225 | |
| 1226 | *packet_id = transport_sequence_number_allocator_->AllocateSequenceNumber(); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1227 | |
| 1228 | if (!packet->SetExtension<TransportSequenceNumber>(*packet_id)) |
| 1229 | return false; |
| 1230 | |
asapersson | 35151f3 | 2016-05-02 23:44:01 -0700 | [diff] [blame] | 1231 | return true; |
sprang | 867fb52 | 2015-08-03 04:38:41 -0700 | [diff] [blame] | 1232 | } |
| 1233 | |
pbos@webrtc.org | d16e839 | 2014-12-19 13:49:55 +0000 | [diff] [blame] | 1234 | void RTPSender::SetSendingMediaStatus(bool enabled) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1235 | rtc::CritScope lock(&send_critsect_); |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 1236 | sending_media_ = enabled; |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1237 | } |
| 1238 | |
| 1239 | bool RTPSender::SendingMedia() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1240 | rtc::CritScope lock(&send_critsect_); |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 1241 | return sending_media_; |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1242 | } |
| 1243 | |
Sebastian Jansson | 1bca65b | 2018-10-10 09:58:08 +0200 | [diff] [blame] | 1244 | void RTPSender::SetAsPartOfAllocation(bool part_of_allocation) { |
| 1245 | rtc::CritScope lock(&send_critsect_); |
| 1246 | force_part_of_allocation_ = part_of_allocation; |
| 1247 | } |
| 1248 | |
danilchap | 71fead2 | 2016-08-18 02:01:49 -0700 | [diff] [blame] | 1249 | void RTPSender::SetTimestampOffset(uint32_t timestamp) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1250 | rtc::CritScope lock(&send_critsect_); |
danilchap | 71fead2 | 2016-08-18 02:01:49 -0700 | [diff] [blame] | 1251 | timestamp_offset_ = timestamp; |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1252 | } |
| 1253 | |
danilchap | 71fead2 | 2016-08-18 02:01:49 -0700 | [diff] [blame] | 1254 | uint32_t RTPSender::TimestampOffset() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1255 | rtc::CritScope lock(&send_critsect_); |
danilchap | 71fead2 | 2016-08-18 02:01:49 -0700 | [diff] [blame] | 1256 | return timestamp_offset_; |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1257 | } |
| 1258 | |
pbos@webrtc.org | 2f44673 | 2013-04-08 11:08:41 +0000 | [diff] [blame] | 1259 | void RTPSender::SetSSRC(uint32_t ssrc) { |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 1260 | // This is configured via the API. |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1261 | rtc::CritScope lock(&send_critsect_); |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1262 | |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 1263 | if (ssrc_ == ssrc) { |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 1264 | return; // Since it's same ssrc, don't reset anything. |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1265 | } |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 1266 | ssrc_.emplace(ssrc); |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 1267 | if (!sequence_number_forced_) { |
danilchap | 47a740b | 2015-12-15 00:30:07 -0800 | [diff] [blame] | 1268 | sequence_number_ = random_.Rand(1, kMaxInitRtpSeqNumber); |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1269 | } |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1270 | } |
| 1271 | |
pbos@webrtc.org | 2f44673 | 2013-04-08 11:08:41 +0000 | [diff] [blame] | 1272 | uint32_t RTPSender::SSRC() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1273 | rtc::CritScope lock(&send_critsect_); |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 1274 | RTC_DCHECK(ssrc_); |
| 1275 | return *ssrc_; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1276 | } |
| 1277 | |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 1278 | void RTPSender::SetRid(const std::string& rid) { |
| 1279 | // RID is used in simulcast scenario when multiple layers share the same mid. |
| 1280 | rtc::CritScope lock(&send_critsect_); |
| 1281 | RTC_DCHECK_LE(rid.length(), RtpStreamId::kMaxValueSizeBytes); |
| 1282 | rid_ = rid; |
| 1283 | } |
| 1284 | |
Steve Anton | 296a0ce | 2018-03-22 15:17:27 -0700 | [diff] [blame] | 1285 | void RTPSender::SetMid(const std::string& mid) { |
| 1286 | // This is configured via the API. |
| 1287 | rtc::CritScope lock(&send_critsect_); |
Steve Anton | 4af9584 | 2018-04-06 11:09:46 -0700 | [diff] [blame] | 1288 | mid_ = mid; |
Steve Anton | 296a0ce | 2018-03-22 15:17:27 -0700 | [diff] [blame] | 1289 | } |
| 1290 | |
Danil Chapovalov | d264df5 | 2018-06-14 12:59:38 +0200 | [diff] [blame] | 1291 | absl::optional<uint32_t> RTPSender::FlexfecSsrc() const { |
Niels Möller | 59ab1cf | 2019-02-06 22:48:11 +0100 | [diff] [blame] | 1292 | return flexfec_ssrc_; |
brandtr | 9dfff29 | 2016-11-14 05:14:50 -0800 | [diff] [blame] | 1293 | } |
| 1294 | |
pbos@webrtc.org | 9334ac2 | 2014-11-24 08:25:50 +0000 | [diff] [blame] | 1295 | void RTPSender::SetCsrcs(const std::vector<uint32_t>& csrcs) { |
sprang | a8ae6f2 | 2017-09-04 07:23:56 -0700 | [diff] [blame] | 1296 | RTC_DCHECK_LE(csrcs.size(), kRtpCsrcSize); |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1297 | rtc::CritScope lock(&send_critsect_); |
pbos@webrtc.org | 9334ac2 | 2014-11-24 08:25:50 +0000 | [diff] [blame] | 1298 | csrcs_ = csrcs; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1299 | } |
| 1300 | |
pbos@webrtc.org | 2f44673 | 2013-04-08 11:08:41 +0000 | [diff] [blame] | 1301 | void RTPSender::SetSequenceNumber(uint16_t seq) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1302 | rtc::CritScope lock(&send_critsect_); |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 1303 | sequence_number_forced_ = true; |
| 1304 | sequence_number_ = seq; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1305 | } |
| 1306 | |
pbos@webrtc.org | 2f44673 | 2013-04-08 11:08:41 +0000 | [diff] [blame] | 1307 | uint16_t RTPSender::SequenceNumber() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1308 | rtc::CritScope lock(&send_critsect_); |
phoglund@webrtc.org | 43da54a | 2013-01-25 10:53:38 +0000 | [diff] [blame] | 1309 | return sequence_number_; |
niklase@google.com | 470e71d | 2011-07-07 08:21:25 +0000 | [diff] [blame] | 1310 | } |
| 1311 | |
Danil Chapovalov | 271195f | 2019-02-11 11:30:03 +0100 | [diff] [blame] | 1312 | static void CopyHeaderAndExtensionsToRtxPacket(const RtpPacketToSend& packet, |
| 1313 | RtpPacketToSend* rtx_packet) { |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 1314 | // Set the relevant fixed packet headers. The following are not set: |
| 1315 | // * Payload type - it is replaced in rtx packets. |
| 1316 | // * Sequence number - RTX has a separate sequence numbering. |
| 1317 | // * SSRC - RTX stream has its own SSRC. |
| 1318 | rtx_packet->SetMarker(packet.Marker()); |
| 1319 | rtx_packet->SetTimestamp(packet.Timestamp()); |
| 1320 | |
| 1321 | // Set the variable fields in the packet header: |
| 1322 | // * CSRCs - must be set before header extensions. |
| 1323 | // * Header extensions - replace Rid header with RepairedRid header. |
| 1324 | const std::vector<uint32_t> csrcs = packet.Csrcs(); |
| 1325 | rtx_packet->SetCsrcs(csrcs); |
| 1326 | for (int extension = kRtpExtensionNone + 1; |
| 1327 | extension < kRtpExtensionNumberOfExtensions; ++extension) { |
| 1328 | RTPExtensionType source_extension = |
| 1329 | static_cast<RTPExtensionType>(extension); |
| 1330 | // Rid header should be replaced with RepairedRid header |
| 1331 | RTPExtensionType destination_extension = |
| 1332 | source_extension == kRtpExtensionRtpStreamId |
| 1333 | ? kRtpExtensionRepairedRtpStreamId |
| 1334 | : source_extension; |
| 1335 | |
| 1336 | // Empty extensions should be supported, so not checking |source.empty()|. |
| 1337 | if (!packet.HasExtension(source_extension)) { |
| 1338 | continue; |
| 1339 | } |
| 1340 | |
| 1341 | rtc::ArrayView<const uint8_t> source = |
| 1342 | packet.FindExtension(source_extension); |
| 1343 | |
| 1344 | rtc::ArrayView<uint8_t> destination = |
| 1345 | rtx_packet->AllocateExtension(destination_extension, source.size()); |
| 1346 | |
| 1347 | // Could happen if any: |
| 1348 | // 1. Extension has 0 length. |
| 1349 | // 2. Extension is not registered in destination. |
| 1350 | // 3. Allocating extension in destination failed. |
| 1351 | if (destination.empty() || source.size() != destination.size()) { |
| 1352 | continue; |
| 1353 | } |
| 1354 | |
| 1355 | std::memcpy(destination.begin(), source.begin(), destination.size()); |
| 1356 | } |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 1357 | } |
| 1358 | |
| 1359 | std::unique_ptr<RtpPacketToSend> RTPSender::BuildRtxPacket( |
| 1360 | const RtpPacketToSend& packet) { |
Danil Chapovalov | 271195f | 2019-02-11 11:30:03 +0100 | [diff] [blame] | 1361 | std::unique_ptr<RtpPacketToSend> rtx_packet; |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 1362 | |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 1363 | // Add original RTP header. |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1364 | { |
| 1365 | rtc::CritScope lock(&send_critsect_); |
| 1366 | if (!sending_media_) |
| 1367 | return nullptr; |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 1368 | |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 1369 | RTC_DCHECK(ssrc_rtx_); |
| 1370 | |
brandtr | e6f98c7 | 2016-11-11 03:28:30 -0800 | [diff] [blame] | 1371 | // Replace payload type. |
| 1372 | auto kv = rtx_payload_type_map_.find(packet.PayloadType()); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1373 | if (kv == rtx_payload_type_map_.end()) |
brandtr | e6f98c7 | 2016-11-11 03:28:30 -0800 | [diff] [blame] | 1374 | return nullptr; |
Danil Chapovalov | 271195f | 2019-02-11 11:30:03 +0100 | [diff] [blame] | 1375 | |
| 1376 | rtx_packet = absl::make_unique<RtpPacketToSend>(&rtp_header_extension_map_, |
| 1377 | max_packet_size_); |
| 1378 | |
brandtr | e6f98c7 | 2016-11-11 03:28:30 -0800 | [diff] [blame] | 1379 | rtx_packet->SetPayloadType(kv->second); |
mflodman@webrtc.org | 9f5ebb5 | 2013-04-12 14:55:46 +0000 | [diff] [blame] | 1380 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1381 | // Replace sequence number. |
| 1382 | rtx_packet->SetSequenceNumber(sequence_number_rtx_++); |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 1383 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1384 | // Replace SSRC. |
nisse | 7d59f6b | 2017-02-21 03:40:24 -0800 | [diff] [blame] | 1385 | rtx_packet->SetSsrc(*ssrc_rtx_); |
Steve Anton | 296a0ce | 2018-03-22 15:17:27 -0700 | [diff] [blame] | 1386 | |
Danil Chapovalov | 271195f | 2019-02-11 11:30:03 +0100 | [diff] [blame] | 1387 | CopyHeaderAndExtensionsToRtxPacket(packet, rtx_packet.get()); |
| 1388 | |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 1389 | // The spec indicates that it is possible for a sender to stop sending mids |
| 1390 | // once the SSRCs have been bound on the receiver. As a result the source |
| 1391 | // rtp packet might not have the MID header extension set. |
| 1392 | // However, the SSRC of the RTX stream might not have been bound on the |
| 1393 | // receiver. This means that we should include it here. |
| 1394 | // The same argument goes for the Repaired RID extension. |
Steve Anton | 4af9584 | 2018-04-06 11:09:46 -0700 | [diff] [blame] | 1395 | if (!mid_.empty()) { |
Steve Anton | 296a0ce | 2018-03-22 15:17:27 -0700 | [diff] [blame] | 1396 | // This is a no-op if the MID header extension is not registered. |
Steve Anton | 4af9584 | 2018-04-06 11:09:46 -0700 | [diff] [blame] | 1397 | rtx_packet->SetExtension<RtpMid>(mid_); |
Steve Anton | 296a0ce | 2018-03-22 15:17:27 -0700 | [diff] [blame] | 1398 | } |
Amit Hilbuch | 77938e6 | 2018-12-21 09:23:38 -0800 | [diff] [blame] | 1399 | if (!rid_.empty()) { |
| 1400 | // This is a no-op if the Repaired-RID header extension is not registered. |
| 1401 | // rtx_packet->SetExtension<RepairedRtpStreamId>(rid_); |
| 1402 | } |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1403 | } |
Danil Chapovalov | 271195f | 2019-02-11 11:30:03 +0100 | [diff] [blame] | 1404 | RTC_DCHECK(rtx_packet); |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 1405 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1406 | uint8_t* rtx_payload = |
| 1407 | rtx_packet->AllocatePayload(packet.payload_size() + kRtxHeaderSize); |
Danil Chapovalov | 271195f | 2019-02-11 11:30:03 +0100 | [diff] [blame] | 1408 | if (rtx_payload == nullptr) |
| 1409 | return nullptr; |
| 1410 | |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 1411 | // Add OSN (original sequence number). |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1412 | ByteWriter<uint16_t>::WriteBigEndian(rtx_payload, packet.SequenceNumber()); |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 1413 | |
| 1414 | // Add original payload data. |
danilchap | 96c1587 | 2016-11-21 01:35:29 -0800 | [diff] [blame] | 1415 | auto payload = packet.payload(); |
| 1416 | memcpy(rtx_payload + kRtxHeaderSize, payload.data(), payload.size()); |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1417 | |
Dino Radaković | 1807d57 | 2018-02-22 14:18:06 +0100 | [diff] [blame] | 1418 | // Add original application data. |
| 1419 | rtx_packet->set_application_data(packet.application_data()); |
| 1420 | |
Danil Chapovalov | 31e4e80 | 2016-08-03 18:27:40 +0200 | [diff] [blame] | 1421 | return rtx_packet; |
mikhal@webrtc.org | bda7f30 | 2013-03-15 23:21:52 +0000 | [diff] [blame] | 1422 | } |
| 1423 | |
sprang@webrtc.org | ebad765 | 2013-12-05 14:29:02 +0000 | [diff] [blame] | 1424 | void RTPSender::RegisterRtpStatisticsCallback( |
| 1425 | StreamDataCountersCallback* callback) { |
danilchap | 7c9426c | 2016-04-14 03:05:31 -0700 | [diff] [blame] | 1426 | rtc::CritScope cs(&statistics_crit_); |
sprang@webrtc.org | ebad765 | 2013-12-05 14:29:02 +0000 | [diff] [blame] | 1427 | rtp_stats_callback_ = callback; |
| 1428 | } |
| 1429 | |
| 1430 | StreamDataCountersCallback* RTPSender::GetRtpStatisticsCallback() const { |
danilchap | 7c9426c | 2016-04-14 03:05:31 -0700 | [diff] [blame] | 1431 | rtc::CritScope cs(&statistics_crit_); |
sprang@webrtc.org | ebad765 | 2013-12-05 14:29:02 +0000 | [diff] [blame] | 1432 | return rtp_stats_callback_; |
| 1433 | } |
| 1434 | |
stefan@webrtc.org | 0bae1fa | 2014-11-05 14:05:29 +0000 | [diff] [blame] | 1435 | uint32_t RTPSender::BitrateSent() const { |
sprang | cd349d9 | 2016-07-13 09:11:28 -0700 | [diff] [blame] | 1436 | rtc::CritScope cs(&statistics_crit_); |
| 1437 | return total_bitrate_sent_.Rate(clock_->TimeInMilliseconds()).value_or(0); |
sprang@webrtc.org | 6811b6e | 2013-12-13 09:46:59 +0000 | [diff] [blame] | 1438 | } |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1439 | |
| 1440 | void RTPSender::SetRtpState(const RtpState& rtp_state) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1441 | rtc::CritScope lock(&send_critsect_); |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1442 | sequence_number_ = rtp_state.sequence_number; |
| 1443 | sequence_number_forced_ = true; |
danilchap | 71fead2 | 2016-08-18 02:01:49 -0700 | [diff] [blame] | 1444 | timestamp_offset_ = rtp_state.start_timestamp; |
danilchap | e5b4141 | 2016-08-22 03:39:23 -0700 | [diff] [blame] | 1445 | last_rtp_timestamp_ = rtp_state.timestamp; |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1446 | capture_time_ms_ = rtp_state.capture_time_ms; |
| 1447 | last_timestamp_time_ms_ = rtp_state.last_timestamp_time_ms; |
stefan@webrtc.org | 8b94e3d | 2014-07-17 16:10:14 +0000 | [diff] [blame] | 1448 | media_has_been_sent_ = rtp_state.media_has_been_sent; |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1449 | } |
| 1450 | |
| 1451 | RtpState RTPSender::GetRtpState() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1452 | rtc::CritScope lock(&send_critsect_); |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1453 | |
| 1454 | RtpState state; |
| 1455 | state.sequence_number = sequence_number_; |
danilchap | 71fead2 | 2016-08-18 02:01:49 -0700 | [diff] [blame] | 1456 | state.start_timestamp = timestamp_offset_; |
danilchap | e5b4141 | 2016-08-22 03:39:23 -0700 | [diff] [blame] | 1457 | state.timestamp = last_rtp_timestamp_; |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1458 | state.capture_time_ms = capture_time_ms_; |
| 1459 | state.last_timestamp_time_ms = last_timestamp_time_ms_; |
stefan@webrtc.org | 8b94e3d | 2014-07-17 16:10:14 +0000 | [diff] [blame] | 1460 | state.media_has_been_sent = media_has_been_sent_; |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1461 | |
| 1462 | return state; |
| 1463 | } |
| 1464 | |
| 1465 | void RTPSender::SetRtxRtpState(const RtpState& rtp_state) { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1466 | rtc::CritScope lock(&send_critsect_); |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1467 | sequence_number_rtx_ = rtp_state.sequence_number; |
| 1468 | } |
| 1469 | |
| 1470 | RtpState RTPSender::GetRtxRtpState() const { |
tommi | ae695e9 | 2016-02-02 08:31:45 -0800 | [diff] [blame] | 1471 | rtc::CritScope lock(&send_critsect_); |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1472 | |
| 1473 | RtpState state; |
| 1474 | state.sequence_number = sequence_number_rtx_; |
danilchap | 71fead2 | 2016-08-18 02:01:49 -0700 | [diff] [blame] | 1475 | state.start_timestamp = timestamp_offset_; |
pbos@webrtc.org | 2bb1bda | 2014-07-07 13:06:48 +0000 | [diff] [blame] | 1476 | |
| 1477 | return state; |
| 1478 | } |
| 1479 | |
philipel | 8aadd50 | 2017-02-23 02:56:13 -0800 | [diff] [blame] | 1480 | void RTPSender::AddPacketToTransportFeedback( |
| 1481 | uint16_t packet_id, |
| 1482 | const RtpPacketToSend& packet, |
| 1483 | const PacedPacketInfo& pacing_info) { |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 1484 | if (transport_feedback_observer_) { |
Erik Språng | 30a276b | 2019-04-23 12:00:11 +0200 | [diff] [blame] | 1485 | size_t packet_size = packet.payload_size() + packet.padding_size(); |
| 1486 | if (send_side_bwe_with_overhead_) { |
| 1487 | packet_size = packet.size(); |
| 1488 | } |
| 1489 | |
| 1490 | RtpPacketSendInfo packet_info; |
| 1491 | packet_info.ssrc = SSRC(); |
| 1492 | packet_info.transport_sequence_number = packet_id; |
Erik Språng | 490d76c | 2019-05-07 09:29:15 -0700 | [diff] [blame] | 1493 | packet_info.has_rtp_sequence_number = true; |
Erik Språng | 30a276b | 2019-04-23 12:00:11 +0200 | [diff] [blame] | 1494 | packet_info.rtp_sequence_number = packet.SequenceNumber(); |
| 1495 | packet_info.length = packet_size; |
| 1496 | packet_info.pacing_info = pacing_info; |
| 1497 | transport_feedback_observer_->OnAddPacket(packet_info); |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | void RTPSender::UpdateRtpOverhead(const RtpPacketToSend& packet) { |
| 1502 | if (!overhead_observer_) |
| 1503 | return; |
nisse | 284542b | 2017-01-10 08:58:32 -0800 | [diff] [blame] | 1504 | size_t overhead_bytes_per_packet; |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 1505 | { |
| 1506 | rtc::CritScope lock(&send_critsect_); |
| 1507 | if (rtp_overhead_bytes_per_packet_ == packet.headers_size()) { |
| 1508 | return; |
| 1509 | } |
| 1510 | rtp_overhead_bytes_per_packet_ = packet.headers_size(); |
nisse | 284542b | 2017-01-10 08:58:32 -0800 | [diff] [blame] | 1511 | overhead_bytes_per_packet = rtp_overhead_bytes_per_packet_; |
michaelt | 4da3044 | 2016-11-17 01:38:43 -0800 | [diff] [blame] | 1512 | } |
| 1513 | overhead_observer_->OnOverheadChanged(overhead_bytes_per_packet); |
| 1514 | } |
| 1515 | |
sprang | 168794c | 2017-07-06 04:38:06 -0700 | [diff] [blame] | 1516 | int64_t RTPSender::LastTimestampTimeMs() const { |
| 1517 | rtc::CritScope lock(&send_critsect_); |
| 1518 | return last_timestamp_time_ms_; |
| 1519 | } |
| 1520 | |
Erik Språng | 8b10192 | 2018-01-18 11:58:05 -0800 | [diff] [blame] | 1521 | void RTPSender::SetRtt(int64_t rtt_ms) { |
| 1522 | packet_history_.SetRtt(rtt_ms); |
| 1523 | flexfec_packet_history_.SetRtt(rtt_ms); |
| 1524 | } |
Erik Språng | 490d76c | 2019-05-07 09:29:15 -0700 | [diff] [blame] | 1525 | |
| 1526 | void RTPSender::OnPacketsAcknowledged( |
| 1527 | rtc::ArrayView<const uint16_t> sequence_numbers) { |
| 1528 | packet_history_.CullAcknowledgedPackets(sequence_numbers); |
| 1529 | } |
pwestin@webrtc.org | c66e8b3 | 2012-11-07 17:01:04 +0000 | [diff] [blame] | 1530 | } // namespace webrtc |