rtp_packet.cc | Explore in Territory

/*
 *  Copyright (c) 2016 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_packet.h"

#include <cstdint>
#include <cstring>
#include <string>
#include <utility>
#include <vector>

#include "api/array_view.h"
#include "api/rtp_parameters.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "modules/rtp_rtcp/source/byte_io.h"
#include "modules/rtp_rtcp/source/rtp_header_extensions.h"
#include "rtc_base/checks.h"
#include "rtc_base/copy_on_write_buffer.h"
#include "rtc_base/logging.h"
#include "rtc_base/numerics/safe_conversions.h"
#include "rtc_base/strings/string_builder.h"

namespace webrtc {
namespace {
constexpr size_t kFixedHeaderSize = …;
constexpr uint8_t kRtpVersion = …;
constexpr uint16_t kOneByteExtensionProfileId = …;
constexpr uint16_t kTwoByteExtensionProfileId = …;
constexpr uint16_t kTwobyteExtensionProfileIdAppBitsFilter = …;
constexpr size_t kOneByteExtensionHeaderLength = …;
constexpr size_t kTwoByteExtensionHeaderLength = …;
constexpr size_t kDefaultPacketSize = …;
}  // namespace

//  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|X|  CC   |M|     PT      |       sequence number         |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |                           timestamp                           |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |           synchronization source (SSRC) identifier            |
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// |            Contributing source (CSRC) identifiers             |
// |                             ....                              |
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// |  header eXtension profile id  |       length in 32bits        |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |                          Extensions                           |
// |                             ....                              |
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// |                           Payload                             |
// |             ....              :  padding...                   |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |               padding         | Padding size  |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
RtpPacket::RtpPacket() : … { … }

RtpPacket::RtpPacket(const ExtensionManager* extensions)
    : … { … }

RtpPacket::RtpPacket(const ExtensionManager* extensions, size_t capacity)
    : … { … }

RtpPacket::RtpPacket(const RtpPacket&) = default;
RtpPacket::RtpPacket(RtpPacket&&) = default;
RtpPacket& RtpPacket::operator=(const RtpPacket&) = default;
RtpPacket& RtpPacket::operator=(RtpPacket&&) = default;
RtpPacket::~RtpPacket() = default;

void RtpPacket::IdentifyExtensions(ExtensionManager extensions) { … }

bool RtpPacket::Parse(const uint8_t* buffer, size_t buffer_size) { … }

bool RtpPacket::Parse(rtc::ArrayView<const uint8_t> packet) { … }

bool RtpPacket::Parse(rtc::CopyOnWriteBuffer buffer) { … }

std::vector<uint32_t> RtpPacket::Csrcs() const { … }

void RtpPacket::CopyHeaderFrom(const RtpPacket& packet) { … }

void RtpPacket::SetMarker(bool marker_bit) { … }

void RtpPacket::SetPayloadType(uint8_t payload_type) { … }

void RtpPacket::SetSequenceNumber(uint16_t seq_no) { … }

void RtpPacket::SetTimestamp(uint32_t timestamp) { … }

void RtpPacket::SetSsrc(uint32_t ssrc) { … }

void RtpPacket::ZeroMutableExtensions() { … }

void RtpPacket::SetCsrcs(rtc::ArrayView<const uint32_t> csrcs) { … }

rtc::ArrayView<uint8_t> RtpPacket::AllocateRawExtension(int id, size_t length) { … }

void RtpPacket::PromoteToTwoByteHeaderExtension() { … }

uint16_t RtpPacket::SetExtensionLengthMaybeAddZeroPadding(
    size_t extensions_offset) { … }

uint8_t* RtpPacket::AllocatePayload(size_t size_bytes) { … }

uint8_t* RtpPacket::SetPayloadSize(size_t size_bytes) { … }

bool RtpPacket::SetPadding(size_t padding_bytes) { … }

void RtpPacket::Clear() { … }

bool RtpPacket::ParseBuffer(const uint8_t* buffer, size_t size) { … }

const RtpPacket::ExtensionInfo* RtpPacket::FindExtensionInfo(int id) const { … }

RtpPacket::ExtensionInfo& RtpPacket::FindOrCreateExtensionInfo(int id) { … }

rtc::ArrayView<const uint8_t> RtpPacket::FindExtension(
    ExtensionType type) const { … }

rtc::ArrayView<uint8_t> RtpPacket::AllocateExtension(ExtensionType type,
                                                     size_t length) { … }

bool RtpPacket::HasExtension(ExtensionType type) const { … }

bool RtpPacket::RemoveExtension(ExtensionType type) { … }

std::string RtpPacket::ToString() const { … }

}  // namespace webrtc
chromium/third_party/webrtc/modules/rtp_rtcp/source/rtp_packet.cc
