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1 /* | 1 /* |
2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 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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421 size_t BlockLength() const { | 421 size_t BlockLength() const { |
422 return 12 + app_.Size; | 422 return 12 + app_.Size; |
423 } | 423 } |
424 | 424 |
425 uint32_t ssrc_; | 425 uint32_t ssrc_; |
426 RTCPUtility::RTCPPacketAPP app_; | 426 RTCPUtility::RTCPPacketAPP app_; |
427 | 427 |
428 RTC_DISALLOW_COPY_AND_ASSIGN(App); | 428 RTC_DISALLOW_COPY_AND_ASSIGN(App); |
429 }; | 429 }; |
430 | 430 |
431 // RFC 4585: Feedback format. | |
432 // | |
433 // Common packet format: | |
434 // | |
435 // 0 1 2 3 | |
436 // 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 | |
437 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
438 // |V=2|P| FMT | PT | length | | |
439 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
440 // | SSRC of packet sender | | |
441 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
442 // | SSRC of media source | | |
443 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
444 // : Feedback Control Information (FCI) : | |
445 // : | |
446 | |
447 // Picture loss indication (PLI) (RFC 4585). | |
448 // | |
449 // FCI: no feedback control information. | |
450 | |
451 class Pli : public RtcpPacket { | |
452 public: | |
453 Pli() : RtcpPacket() { | |
454 memset(&pli_, 0, sizeof(pli_)); | |
455 } | |
456 | |
457 virtual ~Pli() {} | |
458 | |
459 void From(uint32_t ssrc) { | |
460 pli_.SenderSSRC = ssrc; | |
461 } | |
462 void To(uint32_t ssrc) { | |
463 pli_.MediaSSRC = ssrc; | |
464 } | |
465 | |
466 protected: | |
467 bool Create(uint8_t* packet, | |
468 size_t* index, | |
469 size_t max_length, | |
470 RtcpPacket::PacketReadyCallback* callback) const override; | |
471 | |
472 private: | |
473 size_t BlockLength() const { | |
474 return kCommonFbFmtLength; | |
475 } | |
476 | |
477 RTCPUtility::RTCPPacketPSFBPLI pli_; | |
478 | |
479 RTC_DISALLOW_COPY_AND_ASSIGN(Pli); | |
480 }; | |
481 | |
482 // Slice loss indication (SLI) (RFC 4585). | 431 // Slice loss indication (SLI) (RFC 4585). |
483 // | 432 // |
484 // FCI: | 433 // FCI: |
485 // 0 1 2 3 | 434 // 0 1 2 3 |
486 // 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 | 435 // 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 |
487 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 436 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
488 // | First | Number | PictureID | | 437 // | First | Number | PictureID | |
489 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 438 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
490 | 439 |
491 class Sli : public RtcpPacket { | 440 class Sli : public RtcpPacket { |
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1056 | 1005 |
1057 private: | 1006 private: |
1058 const size_t buffer_length_; | 1007 const size_t buffer_length_; |
1059 size_t length_; | 1008 size_t length_; |
1060 rtc::scoped_ptr<uint8_t[]> buffer_; | 1009 rtc::scoped_ptr<uint8_t[]> buffer_; |
1061 }; | 1010 }; |
1062 | 1011 |
1063 } // namespace rtcp | 1012 } // namespace rtcp |
1064 } // namespace webrtc | 1013 } // namespace webrtc |
1065 #endif // WEBRTC_MODULES_RTP_RTCP_RTCP_PACKET_H_ | 1014 #endif // WEBRTC_MODULES_RTP_RTCP_RTCP_PACKET_H_ |
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