diff options
Diffstat (limited to 'webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h')
-rw-r--r-- | webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h new file mode 100644 index 0000000000..fb2be113a2 --- /dev/null +++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h @@ -0,0 +1,63 @@ +/* + * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_NACK_H_ +#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_NACK_H_ + +#include <vector> + +#include "webrtc/base/basictypes.h" +#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h" +#include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h" + +namespace webrtc { +namespace rtcp { + +class Nack : public Rtpfb { + public: + const uint8_t kFeedbackMessageType = 1; + Nack() {} + + virtual ~Nack() {} + + // Parse assumes header is already parsed and validated. + bool Parse(const RTCPUtility::RtcpCommonHeader& header, + const uint8_t* payload); // Size of the payload is in the header. + + void WithList(const uint16_t* nack_list, size_t length); + const std::vector<uint16_t>& packet_ids() const { return packet_ids_; } + + protected: + bool Create(uint8_t* packet, + size_t* index, + size_t max_length, + RtcpPacket::PacketReadyCallback* callback) const override; + + size_t BlockLength() const override; + + private: + const size_t kNackItemLength = 4; + struct PackedNack { + uint16_t first_pid; + uint16_t bitmask; + }; + + void Pack(); // Fills packed_ using packed_ids_. (used in WithList). + void Unpack(); // Fills packet_ids_ using packed_. (used in Parse). + + std::vector<PackedNack> packed_; + std::vector<uint16_t> packet_ids_; + + RTC_DISALLOW_COPY_AND_ASSIGN(Nack); +}; + +} // namespace rtcp +} // namespace webrtc +#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_NACK_H_ |