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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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| 346 private: | 346 private: |
| 347 size_t BlockLength() const { | 347 size_t BlockLength() const { |
| 348 const size_t kFciLength = 8; | 348 const size_t kFciLength = 8; |
| 349 return kCommonFbFmtLength + kFciLength; | 349 return kCommonFbFmtLength + kFciLength; |
| 350 } | 350 } |
| 351 | 351 |
| 352 RTCPUtility::RTCPPacketPSFBFIR fir_; | 352 RTCPUtility::RTCPPacketPSFBFIR fir_; |
| 353 RTCPUtility::RTCPPacketPSFBFIRItem fir_item_; | 353 RTCPUtility::RTCPPacketPSFBFIRItem fir_item_; |
| 354 }; | 354 }; |
| 355 | 355 |
| 356 // Receiver Estimated Max Bitrate (REMB) (draft-alvestrand-rmcat-remb). | |
| 357 // | |
| 358 // 0 1 2 3 | |
| 359 // 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 | |
| 360 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 361 // |V=2|P| FMT=15 | PT=206 | length | | |
| 362 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 363 // | SSRC of packet sender | | |
| 364 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 365 // | SSRC of media source | | |
| 366 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 367 // | Unique identifier 'R' 'E' 'M' 'B' | | |
| 368 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 369 // | Num SSRC | BR Exp | BR Mantissa | | |
| 370 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 371 // | SSRC feedback | | |
| 372 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 373 // | ... | |
| 374 | |
| 375 class Remb : public RtcpPacket { | |
| 376 public: | |
| 377 Remb() : RtcpPacket() { | |
| 378 memset(&remb_, 0, sizeof(remb_)); | |
| 379 memset(&remb_item_, 0, sizeof(remb_item_)); | |
| 380 } | |
| 381 | |
| 382 virtual ~Remb() {} | |
| 383 | |
| 384 void From(uint32_t ssrc) { | |
| 385 remb_.SenderSSRC = ssrc; | |
| 386 } | |
| 387 void AppliesTo(uint32_t ssrc); | |
| 388 | |
| 389 void WithBitrateBps(uint32_t bitrate_bps) { | |
| 390 remb_item_.BitRate = bitrate_bps; | |
| 391 } | |
| 392 | |
| 393 protected: | |
| 394 bool Create(uint8_t* packet, | |
| 395 size_t* index, | |
| 396 size_t max_length, | |
| 397 RtcpPacket::PacketReadyCallback* callback) const override; | |
| 398 | |
| 399 private: | |
| 400 static const int kMaxNumberOfSsrcs = 0xff; | |
| 401 | |
| 402 size_t BlockLength() const { | |
| 403 return (remb_item_.NumberOfSSRCs + 5) * 4; | |
| 404 } | |
| 405 | |
| 406 RTCPUtility::RTCPPacketPSFBAPP remb_; | |
| 407 RTCPUtility::RTCPPacketPSFBREMBItem remb_item_; | |
| 408 | |
| 409 RTC_DISALLOW_COPY_AND_ASSIGN(Remb); | |
| 410 }; | |
| 411 | |
| 412 // From RFC 3611: RTP Control Protocol Extended Reports (RTCP XR). | 356 // From RFC 3611: RTP Control Protocol Extended Reports (RTCP XR). |
| 413 // | 357 // |
| 414 // Format for XR packets: | 358 // Format for XR packets: |
| 415 // | 359 // |
| 416 // 0 1 2 3 | 360 // 0 1 2 3 |
| 417 // 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 | 361 // 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 |
| 418 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 362 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 419 // |V=2|P|reserved | PT=XR=207 | length | | 363 // |V=2|P|reserved | PT=XR=207 | length | |
| 420 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 364 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 421 // | SSRC | | 365 // | SSRC | |
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| 495 | 439 |
| 496 private: | 440 private: |
| 497 const size_t buffer_length_; | 441 const size_t buffer_length_; |
| 498 size_t length_; | 442 size_t length_; |
| 499 rtc::scoped_ptr<uint8_t[]> buffer_; | 443 rtc::scoped_ptr<uint8_t[]> buffer_; |
| 500 }; | 444 }; |
| 501 | 445 |
| 502 } // namespace rtcp | 446 } // namespace rtcp |
| 503 } // namespace webrtc | 447 } // namespace webrtc |
| 504 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_ | 448 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_ |
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