blob: 46c641ea2f165daced822aa896702de5cf21e03a [file] [log] [blame]
/*
* Copyright (c) 2021 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 "modules/rtp_rtcp/source/rtp_util.h"
#include <cstddef>
#include <cstdint>
#include "api/array_view.h"
namespace webrtc {
namespace {
constexpr uint8_t kRtpVersion = 2;
constexpr size_t kMinRtpPacketLen = 12;
constexpr size_t kMinRtcpPacketLen = 4;
bool HasCorrectRtpVersion(rtc::ArrayView<const uint8_t> packet) {
return packet[0] >> 6 == kRtpVersion;
}
// For additional details, see http://tools.ietf.org/html/rfc5761#section-4
bool PayloadTypeIsReservedForRtcp(uint8_t payload_type) {
return 64 <= payload_type && payload_type < 96;
}
} // namespace
bool IsRtpPacket(rtc::ArrayView<const uint8_t> packet) {
return packet.size() >= kMinRtpPacketLen && HasCorrectRtpVersion(packet) &&
!PayloadTypeIsReservedForRtcp(packet[1] & 0x7F);
}
bool IsRtcpPacket(rtc::ArrayView<const uint8_t> packet) {
return packet.size() >= kMinRtcpPacketLen && HasCorrectRtpVersion(packet) &&
PayloadTypeIsReservedForRtcp(packet[1] & 0x7F);
}
} // namespace webrtc