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1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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631 rpsi.WithPictureId(ctx->picture_id); | 631 rpsi.WithPictureId(ctx->picture_id); |
632 | 632 |
633 PacketBuiltCallback callback(ctx); | 633 PacketBuiltCallback callback(ctx); |
634 if (!callback.BuildPacket(rpsi)) | 634 if (!callback.BuildPacket(rpsi)) |
635 return BuildResult::kTruncated; | 635 return BuildResult::kTruncated; |
636 | 636 |
637 return BuildResult::kSuccess; | 637 return BuildResult::kSuccess; |
638 } | 638 } |
639 | 639 |
640 RTCPSender::BuildResult RTCPSender::BuildREMB(RtcpContext* ctx) { | 640 RTCPSender::BuildResult RTCPSender::BuildREMB(RtcpContext* ctx) { |
641 rtcp::Remb remb; | 641 // sanity |
642 remb.From(ssrc_); | 642 if (ctx->position + 20 + 4 * remb_ssrcs_.size() >= IP_PACKET_SIZE) |
643 for (uint32_t ssrc : remb_ssrcs_) | 643 return BuildResult::kTruncated; |
644 remb.AppliesTo(ssrc); | |
645 remb.WithBitrateBps(remb_bitrate_); | |
646 | 644 |
647 PacketBuiltCallback callback(ctx); | 645 // add application layer feedback |
648 if (!callback.BuildPacket(remb)) | 646 uint8_t FMT = 15; |
649 return BuildResult::kTruncated; | 647 *ctx->AllocateData(1) = 0x80 + FMT; |
| 648 *ctx->AllocateData(1) = 206; |
| 649 |
| 650 *ctx->AllocateData(1) = 0; |
| 651 *ctx->AllocateData(1) = static_cast<uint8_t>(remb_ssrcs_.size() + 4); |
| 652 |
| 653 // Add our own SSRC |
| 654 ByteWriter<uint32_t>::WriteBigEndian(ctx->AllocateData(4), ssrc_); |
| 655 |
| 656 // Remote SSRC must be 0 |
| 657 ByteWriter<uint32_t>::WriteBigEndian(ctx->AllocateData(4), 0); |
| 658 |
| 659 *ctx->AllocateData(1) = 'R'; |
| 660 *ctx->AllocateData(1) = 'E'; |
| 661 *ctx->AllocateData(1) = 'M'; |
| 662 *ctx->AllocateData(1) = 'B'; |
| 663 |
| 664 *ctx->AllocateData(1) = remb_ssrcs_.size(); |
| 665 // 6 bit Exp |
| 666 // 18 bit mantissa |
| 667 uint8_t brExp = 0; |
| 668 for (uint32_t i = 0; i < 64; i++) { |
| 669 if (remb_bitrate_ <= (0x3FFFFu << i)) { |
| 670 brExp = i; |
| 671 break; |
| 672 } |
| 673 } |
| 674 const uint32_t brMantissa = (remb_bitrate_ >> brExp); |
| 675 *ctx->AllocateData(1) = |
| 676 static_cast<uint8_t>((brExp << 2) + ((brMantissa >> 16) & 0x03)); |
| 677 *ctx->AllocateData(1) = static_cast<uint8_t>(brMantissa >> 8); |
| 678 *ctx->AllocateData(1) = static_cast<uint8_t>(brMantissa); |
| 679 |
| 680 for (size_t i = 0; i < remb_ssrcs_.size(); i++) |
| 681 ByteWriter<uint32_t>::WriteBigEndian(ctx->AllocateData(4), remb_ssrcs_[i]); |
650 | 682 |
651 TRACE_EVENT_INSTANT0(TRACE_DISABLED_BY_DEFAULT("webrtc_rtp"), | 683 TRACE_EVENT_INSTANT0(TRACE_DISABLED_BY_DEFAULT("webrtc_rtp"), |
652 "RTCPSender::REMB"); | 684 "RTCPSender::REMB"); |
653 | 685 |
654 return BuildResult::kSuccess; | 686 return BuildResult::kSuccess; |
655 } | 687 } |
656 | 688 |
657 void RTCPSender::SetTargetBitrate(unsigned int target_bitrate) { | 689 void RTCPSender::SetTargetBitrate(unsigned int target_bitrate) { |
658 CriticalSectionScoped lock(critical_section_rtcp_sender_.get()); | 690 CriticalSectionScoped lock(critical_section_rtcp_sender_.get()); |
659 tmmbr_send_ = target_bitrate / 1000; | 691 tmmbr_send_ = target_bitrate / 1000; |
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1379 | 1411 |
1380 bool RTCPSender::AllVolatileFlagsConsumed() const { | 1412 bool RTCPSender::AllVolatileFlagsConsumed() const { |
1381 for (const ReportFlag& flag : report_flags_) { | 1413 for (const ReportFlag& flag : report_flags_) { |
1382 if (flag.is_volatile) | 1414 if (flag.is_volatile) |
1383 return false; | 1415 return false; |
1384 } | 1416 } |
1385 return true; | 1417 return true; |
1386 } | 1418 } |
1387 | 1419 |
1388 } // namespace webrtc | 1420 } // namespace webrtc |
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