diff options
Diffstat (limited to 'webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.cc')
-rw-r--r-- | webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.cc | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.cc b/webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.cc new file mode 100644 index 0000000000..b5571d45a3 --- /dev/null +++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.cc @@ -0,0 +1,45 @@ +/* + * 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. + */ + +#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h" + +#include "webrtc/modules/rtp_rtcp/source/byte_io.h" + +namespace webrtc { +namespace rtcp { + +// RFC 4585, Section 6.1: Feedback format. +// +// Common packet format: +// +// 0 1 2 3 +// 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 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// |V=2|P| FMT | PT | length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// 0 | SSRC of packet sender | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// 4 | SSRC of media source | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// : Feedback Control Information (FCI) : +// : : + +void Rtpfb::ParseCommonFeedback(const uint8_t* payload) { + sender_ssrc_ = ByteReader<uint32_t>::ReadBigEndian(&payload[0]); + media_ssrc_ = ByteReader<uint32_t>::ReadBigEndian(&payload[4]); +} + +void Rtpfb::CreateCommonFeedback(uint8_t* payload) const { + ByteWriter<uint32_t>::WriteBigEndian(&payload[0], sender_ssrc_); + ByteWriter<uint32_t>::WriteBigEndian(&payload[4], media_ssrc_); +} + +} // namespace rtcp +} // namespace webrtc |