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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "media/cast/rtcp/rtcp_sender.h" | 5 #include "media/cast/rtcp/rtcp_sender.h" |
| 6 | 6 |
| 7 #include <algorithm> | 7 #include <algorithm> |
| 8 #include <vector> | 8 #include <vector> |
| 9 | 9 |
| 10 #include "base/debug/trace_event.h" | |
| 11 #include "base/logging.h" | 10 #include "base/logging.h" |
| 11 #include "media/cast/cast_environment.h" |
| 12 #include "media/cast/pacing/paced_sender.h" | 12 #include "media/cast/pacing/paced_sender.h" |
| 13 #include "media/cast/rtcp/rtcp_utility.h" | 13 #include "media/cast/rtcp/rtcp_utility.h" |
| 14 #include "net/base/big_endian.h" | 14 #include "net/base/big_endian.h" |
| 15 | 15 |
| 16 namespace media { | 16 namespace media { |
| 17 namespace cast { | 17 namespace cast { |
| 18 | 18 |
| 19 static const size_t kRtcpMaxNackFields = 253; | 19 static const size_t kRtcpMaxNackFields = 253; |
| 20 static const size_t kRtcpMaxCastLossFields = 100; | 20 static const size_t kRtcpMaxCastLossFields = 100; |
| 21 | 21 |
| 22 RtcpSender::RtcpSender(PacedPacketSender* outgoing_transport, | 22 RtcpSender::RtcpSender(scoped_refptr<CastEnvironment> cast_environment, |
| 23 PacedPacketSender* outgoing_transport, |
| 23 uint32 sending_ssrc, | 24 uint32 sending_ssrc, |
| 24 const std::string& c_name) | 25 const std::string& c_name) |
| 25 : ssrc_(sending_ssrc), | 26 : ssrc_(sending_ssrc), |
| 26 c_name_(c_name), | 27 c_name_(c_name), |
| 27 transport_(outgoing_transport) { | 28 transport_(outgoing_transport), |
| 29 cast_environment_(cast_environment) { |
| 28 DCHECK_LT(c_name_.length(), kRtcpCnameSize) << "Invalid config"; | 30 DCHECK_LT(c_name_.length(), kRtcpCnameSize) << "Invalid config"; |
| 29 } | 31 } |
| 30 | 32 |
| 31 RtcpSender::~RtcpSender() {} | 33 RtcpSender::~RtcpSender() {} |
| 32 | 34 |
| 33 void RtcpSender::SendRtcpFromRtpSender(uint32 packet_type_flags, | 35 void RtcpSender::SendRtcpFromRtpSender(uint32 packet_type_flags, |
| 34 const RtcpSenderInfo* sender_info, | 36 const RtcpSenderInfo* sender_info, |
| 35 const RtcpDlrrReportBlock* dlrr, | 37 const RtcpDlrrReportBlock* dlrr, |
| 36 const RtcpSenderLogMessage* sender_log) { | 38 const RtcpSenderLogMessage* sender_log) { |
| 37 if (packet_type_flags & kRtcpRr || | 39 if (packet_type_flags & kRtcpRr || |
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| 242 | 244 |
| 243 packet->resize(start_size + 12); | 245 packet->resize(start_size + 12); |
| 244 | 246 |
| 245 net::BigEndianWriter big_endian_writer(&((*packet)[start_size]), 12); | 247 net::BigEndianWriter big_endian_writer(&((*packet)[start_size]), 12); |
| 246 uint8 FMT = 1; // Picture loss indicator. | 248 uint8 FMT = 1; // Picture loss indicator. |
| 247 big_endian_writer.WriteU8(0x80 + FMT); | 249 big_endian_writer.WriteU8(0x80 + FMT); |
| 248 big_endian_writer.WriteU8(206); | 250 big_endian_writer.WriteU8(206); |
| 249 big_endian_writer.WriteU16(2); // Used fixed length of 2. | 251 big_endian_writer.WriteU16(2); // Used fixed length of 2. |
| 250 big_endian_writer.WriteU32(ssrc_); // Add our own SSRC. | 252 big_endian_writer.WriteU32(ssrc_); // Add our own SSRC. |
| 251 big_endian_writer.WriteU32(remote_ssrc); // Add the remote SSRC. | 253 big_endian_writer.WriteU32(remote_ssrc); // Add the remote SSRC. |
| 252 TRACE_EVENT_INSTANT2("cast_rtcp", "RtcpSender::PLI", TRACE_EVENT_SCOPE_THREAD, | |
| 253 "remote_ssrc", remote_ssrc, | |
| 254 "ssrc", ssrc_); | |
| 255 } | 254 } |
| 256 | 255 |
| 257 /* | 256 /* |
| 258 0 1 2 3 | 257 0 1 2 3 |
| 259 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | 258 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 260 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 259 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 261 | PB |0| Payload Type| Native Rpsi bit string | | 260 | PB |0| Payload Type| Native Rpsi bit string | |
| 262 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 261 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 263 | defined per codec ... | Padding (0) | | 262 | defined per codec ... | Padding (0) | |
| 264 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 263 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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| 348 | 347 |
| 349 big_endian_writer.WriteU8(static_cast<uint8>((bitrate_exponent << 2) + | 348 big_endian_writer.WriteU8(static_cast<uint8>((bitrate_exponent << 2) + |
| 350 ((bitrate_mantissa >> 16) & 0x03))); | 349 ((bitrate_mantissa >> 16) & 0x03))); |
| 351 big_endian_writer.WriteU8(static_cast<uint8>(bitrate_mantissa >> 8)); | 350 big_endian_writer.WriteU8(static_cast<uint8>(bitrate_mantissa >> 8)); |
| 352 big_endian_writer.WriteU8(static_cast<uint8>(bitrate_mantissa)); | 351 big_endian_writer.WriteU8(static_cast<uint8>(bitrate_mantissa)); |
| 353 | 352 |
| 354 std::list<uint32>::const_iterator it = remb->remb_ssrcs.begin(); | 353 std::list<uint32>::const_iterator it = remb->remb_ssrcs.begin(); |
| 355 for (; it != remb->remb_ssrcs.end(); ++it) { | 354 for (; it != remb->remb_ssrcs.end(); ++it) { |
| 356 big_endian_writer.WriteU32(*it); | 355 big_endian_writer.WriteU32(*it); |
| 357 } | 356 } |
| 358 TRACE_COUNTER_ID1("cast_rtcp", "RtcpSender::RembBitrate", ssrc_, | 357 cast_environment_->Logging()->InsertGenericEvent(kRembBitrate, |
| 359 remb->remb_bitrate); | 358 remb->remb_bitrate); |
| 360 } | 359 } |
| 361 | 360 |
| 362 void RtcpSender::BuildNack(const RtcpNackMessage* nack, | 361 void RtcpSender::BuildNack(const RtcpNackMessage* nack, |
| 363 std::vector<uint8>* packet) const { | 362 std::vector<uint8>* packet) const { |
| 364 size_t start_size = packet->size(); | 363 size_t start_size = packet->size(); |
| 365 DCHECK_LT(start_size + 16, kIpPacketSize) << "Not enough buffer space"; | 364 DCHECK_LT(start_size + 16, kIpPacketSize) << "Not enough buffer space"; |
| 366 if (start_size + 16 > kIpPacketSize) return; | 365 if (start_size + 16 > kIpPacketSize) return; |
| 367 | 366 |
| 368 packet->resize(start_size + 16); | 367 packet->resize(start_size + 16); |
| 369 | 368 |
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| 405 if (start_size + 4 > kIpPacketSize) return; | 404 if (start_size + 4 > kIpPacketSize) return; |
| 406 | 405 |
| 407 packet->resize(start_size + 4); | 406 packet->resize(start_size + 4); |
| 408 net::BigEndianWriter big_endian_nack_writer(&((*packet)[start_size]), 4); | 407 net::BigEndianWriter big_endian_nack_writer(&((*packet)[start_size]), 4); |
| 409 big_endian_nack_writer.WriteU16(nack_sequence_number); | 408 big_endian_nack_writer.WriteU16(nack_sequence_number); |
| 410 big_endian_nack_writer.WriteU16(bitmask); | 409 big_endian_nack_writer.WriteU16(bitmask); |
| 411 number_of_nack_fields++; | 410 number_of_nack_fields++; |
| 412 } | 411 } |
| 413 DCHECK_GE(kRtcpMaxNackFields, number_of_nack_fields); | 412 DCHECK_GE(kRtcpMaxNackFields, number_of_nack_fields); |
| 414 (*packet)[nack_size_pos] = static_cast<uint8>(2 + number_of_nack_fields); | 413 (*packet)[nack_size_pos] = static_cast<uint8>(2 + number_of_nack_fields); |
| 415 TRACE_COUNTER_ID1("cast_rtcp", "RtcpSender::NACK", ssrc_, | |
| 416 nack->nack_list.size()); | |
| 417 } | 414 } |
| 418 | 415 |
| 419 void RtcpSender::BuildBye(std::vector<uint8>* packet) const { | 416 void RtcpSender::BuildBye(std::vector<uint8>* packet) const { |
| 420 size_t start_size = packet->size(); | 417 size_t start_size = packet->size(); |
| 421 DCHECK_LT(start_size + 8, kIpPacketSize) << "Not enough buffer space"; | 418 DCHECK_LT(start_size + 8, kIpPacketSize) << "Not enough buffer space"; |
| 422 if (start_size + 8 > kIpPacketSize) return; | 419 if (start_size + 8 > kIpPacketSize) return; |
| 423 | 420 |
| 424 packet->resize(start_size + 8); | 421 packet->resize(start_size + 8); |
| 425 | 422 |
| 426 net::BigEndianWriter big_endian_writer(&((*packet)[start_size]), 8); | 423 net::BigEndianWriter big_endian_writer(&((*packet)[start_size]), 8); |
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| 560 } | 557 } |
| 561 } | 558 } |
| 562 big_endian_nack_writer.WriteU8(bitmask); | 559 big_endian_nack_writer.WriteU8(bitmask); |
| 563 ++number_of_loss_fields; | 560 ++number_of_loss_fields; |
| 564 } | 561 } |
| 565 } | 562 } |
| 566 } | 563 } |
| 567 DCHECK_LE(number_of_loss_fields, kRtcpMaxCastLossFields); | 564 DCHECK_LE(number_of_loss_fields, kRtcpMaxCastLossFields); |
| 568 (*packet)[cast_size_pos] = static_cast<uint8>(4 + number_of_loss_fields); | 565 (*packet)[cast_size_pos] = static_cast<uint8>(4 + number_of_loss_fields); |
| 569 (*packet)[cast_loss_field_pos] = static_cast<uint8>(number_of_loss_fields); | 566 (*packet)[cast_loss_field_pos] = static_cast<uint8>(number_of_loss_fields); |
| 570 | |
| 571 // Frames with missing packets. | |
| 572 TRACE_COUNTER_ID1("cast_rtcp", "RtcpSender::CastNACK", ssrc_, | |
| 573 cast->missing_frames_and_packets_.size()); | |
| 574 } | 567 } |
| 575 | 568 |
| 576 void RtcpSender::BuildSenderLog(const RtcpSenderLogMessage* sender_log_message, | 569 void RtcpSender::BuildSenderLog(const RtcpSenderLogMessage* sender_log_message, |
| 577 std::vector<uint8>* packet) const { | 570 std::vector<uint8>* packet) const { |
| 578 // TODO(pwestin): Implement. | 571 // TODO(pwestin): Implement. |
| 579 NOTIMPLEMENTED(); | 572 NOTIMPLEMENTED(); |
| 580 } | 573 } |
| 581 | 574 |
| 582 void RtcpSender::BuildReceiverLog( | 575 void RtcpSender::BuildReceiverLog( |
| 583 const RtcpReceiverLogMessage* receiver_log_message, | 576 const RtcpReceiverLogMessage* receiver_log_message, |
| 584 std::vector<uint8>* packet) const { | 577 std::vector<uint8>* packet) const { |
| 585 // TODO(pwestin): Implement. | 578 // TODO(pwestin): Implement. |
| 586 NOTIMPLEMENTED(); | 579 NOTIMPLEMENTED(); |
| 587 } | 580 } |
| 588 | 581 |
| 589 } // namespace cast | 582 } // namespace cast |
| 590 } // namespace media | 583 } // namespace media |
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