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[feat] rewrite rtp module

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This commit is contained in:
dijunkun
2025-01-22 17:32:24 +08:00
parent ea592f5a58
commit cd349cd98d
16 changed files with 1858 additions and 1002 deletions
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46
src/common/copy_on_write_buffer.h Normal file
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@@ -0,0 +1,46 @@
/*
* @Author: DI JUNKUN
* @Date: 2025-01-22
* Copyright (c) 2025 by DI JUNKUN, All Rights Reserved.
*/
#ifndef _COPY_ON_WRITE_BUFFER_H_
#define _COPY_ON_WRITE_BUFFER_H_
#include <memory>
#include <vector>
class CopyOnWriteBuffer {
public:
CopyOnWriteBuffer() = default;
CopyOnWriteBuffer(const CopyOnWriteBuffer& other) = default;
CopyOnWriteBuffer(CopyOnWriteBuffer&& other) noexcept = default;
CopyOnWriteBuffer& operator=(const CopyOnWriteBuffer& other) = default;
CopyOnWriteBuffer& operator=(CopyOnWriteBuffer&& other) noexcept = default;
void SetData(const uint8_t* data, size_t size) {
buffer_ = std::make_shared<std::vector<uint8_t>>(data, data + size);
}
const uint8_t* data() const { return buffer_ ? buffer_->data() : nullptr; }
size_t size() const { return buffer_ ? buffer_->size() : 0; }
uint8_t& operator[](size_t index) {
EnsureUnique();
return (*buffer_)[index];
}
const uint8_t& operator[](size_t index) const { return (*buffer_)[index]; }
private:
void EnsureUnique() {
if (!buffer_.unique()) {
buffer_ = std::make_shared<std::vector<uint8_t>>(*buffer_);
}
}
std::shared_ptr<std::vector<uint8_t>> buffer_;
};
#endif

2
src/rtp/rtp_packet/rtp_codec.h
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@@ -36,7 +36,7 @@ class RtpCodec {
uint8_t version_ = 0;
bool has_padding_ = false;
bool has_extension_ = false;
uint32_t total_csrc_number_ = 0;
uint32_t csrc_count_ = 0;
bool marker_ = false;
uint32_t payload_type_ = 0;
uint16_t sequence_number_ = 0;

60
src/rtp/rtp_packet/rtp_header.h
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@@ -7,40 +7,58 @@
#ifndef _RTP_HEADER_H_
#define _RTP_HEADER_H_
#include <chrono>
#include <cstddef>
#include <cstdint>
#include <optional>
#include <string>
#include "api/units/timestamp.h"
static constexpr int kMaxRtpCsrcSize = 15;
static constexpr uint8_t kRtpVersion = 2;
static constexpr int kAbsSendTimeFraction = 18;
struct RTPHeaderExtension {
RTPHeaderExtension();
RTPHeaderExtension(const RTPHeaderExtension& other);
RTPHeaderExtension& operator=(const RTPHeaderExtension& other);
enum { kRtpCsrcSize = 15 }; // RFC 3550 page 13
static constexpr int kAbsSendTimeFraction = 18;
bool hasAbsoluteSendTime;
uint32_t absoluteSendTime;
};
struct RTPHeader {
RTPHeader()
: markerBit(false),
payloadType(0),
sequenceNumber(0),
timestamp(0),
ssrc(0),
numCSRCs(0),
arrOfCSRCs(),
paddingLength(0),
headerLength(0){};
: version_(kRtpVersion),
has_padding_(false),
has_extension_(false),
csrc_count_(0),
marker_(false),
payload_type_(0),
sequence_number_(1),
timestamp_(0),
ssrc_(0),
csrcs_(),
padding_len(0),
header_len(0){};
RTPHeader(const RTPHeader& other) = default;
RTPHeader& operator=(const RTPHeader& other) = default;
bool markerBit;
uint8_t payloadType;
uint16_t sequenceNumber;
uint32_t timestamp;
uint32_t ssrc;
uint8_t numCSRCs;
uint32_t arrOfCSRCs[kRtpCsrcSize];
size_t paddingLength;
size_t headerLength;
uint8_t version_ = 0;
bool has_padding_ = false;
bool has_extension_ = false;
uint8_t csrc_count_ = 0;
bool marker_ = false;
uint8_t payload_type_ = 0;
uint16_t sequence_number_ = 1;
uint64_t timestamp_ = 0;
uint32_t ssrc_ = 0;
uint32_t csrcs_[kRtpCsrcSize];
size_t padding_len;
size_t header_len;
RTPHeaderExtension extension;
};
#endif

787
src/rtp/rtp_packet/rtp_packet.cc Normal file
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@@ -0,0 +1,787 @@
#include <string>
#include "rtp_packet.h"
void RtpPacket::TryToDecodeRtpPacket() {
if (PAYLOAD_TYPE::H264 == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
nal_unit_type_ = NAL_UNIT_TYPE(buffer_[12] & 0x1F);
if (NAL_UNIT_TYPE::NALU == nal_unit_type_) {
DecodeH264Nalu();
} else if (NAL_UNIT_TYPE::FU_A == nal_unit_type_) {
DecodeH264Fua();
}
} else if (PAYLOAD_TYPE::H264_FEC_SOURCE == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
nal_unit_type_ = NAL_UNIT_TYPE::FU_A;
DecodeH264FecSource();
} else if (PAYLOAD_TYPE::H264_FEC_REPAIR == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
DecodeH264FecRepair();
} else if (PAYLOAD_TYPE::AV1 == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
DecodeAv1();
} else if (PAYLOAD_TYPE::OPUS == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
DecodeOpus();
} else if (PAYLOAD_TYPE::DATA == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
DecodeData();
} else {
LOG_ERROR("Unknown pt: {}", (int)PAYLOAD_TYPE(buffer_[1] & 0x7F));
}
}
void RtpPacket::ParseRtpData() {
if (!parsed_) {
TryToDecodeRtpPacket();
parsed_ = true;
}
}
RtpPacket::RtpPacket() : buffer_(new uint8_t[DEFAULT_MTU]), size_(DEFAULT_MTU) {
memset(buffer_, 0, DEFAULT_MTU);
// ParseRtpData();
}
RtpPacket::RtpPacket(uint32_t size) : buffer_(new uint8_t[size]), size_(size) {}
RtpPacket::RtpPacket(const uint8_t *buffer, uint32_t size) {
if (size > 0) {
buffer_ = (uint8_t *)malloc(size);
if (NULL == buffer_) {
LOG_ERROR("Malloc failed");
} else {
memcpy(buffer_, buffer, size);
}
size_ = size;
// TryToDecodeH264RtpPacket(buffer_);
ParseRtpData();
}
}
RtpPacket::RtpPacket(const RtpPacket &rtp_packet) {
if (rtp_packet.size_ > 0) {
buffer_ = (uint8_t *)malloc(rtp_packet.size_);
if (NULL == buffer_) {
LOG_ERROR("Malloc failed");
} else {
memcpy(buffer_, rtp_packet.buffer_, rtp_packet.size_);
}
size_ = rtp_packet.size_;
// TryToDecodeH264RtpPacket(buffer_);
ParseRtpData();
}
}
RtpPacket::RtpPacket(RtpPacket &&rtp_packet)
: buffer_((uint8_t *)std::move(rtp_packet.buffer_)),
size_(rtp_packet.size_) {
rtp_packet.buffer_ = nullptr;
rtp_packet.size_ = 0;
// TryToDecodeH264RtpPacket(buffer_);
ParseRtpData();
}
// RtpPacket &RtpPacket::operator=(const RtpPacket &rtp_packet) {
// if (&rtp_packet != this) {
// if (buffer_) {
// delete[] buffer_;
// buffer_ = nullptr;
// }
// buffer_ = new uint8_t[rtp_packet.size_];
// memcpy(buffer_, rtp_packet.buffer_, rtp_packet.size_);
// size_ = rtp_packet.size_;
// // TryToDecodeH264RtpPacket(buffer_);
// }
// return *this;
// }
RtpPacket &RtpPacket::operator=(const RtpPacket &rtp_packet) {
if (&rtp_packet != this) {
buffer_ = (uint8_t *)realloc(buffer_, rtp_packet.size_);
memcpy(buffer_, rtp_packet.buffer_, rtp_packet.size_);
size_ = rtp_packet.size_;
// TryToDecodeH264RtpPacket(buffer_);
}
return *this;
}
RtpPacket &RtpPacket::operator=(RtpPacket &&rtp_packet) {
if (&rtp_packet != this) {
buffer_ = std::move(rtp_packet.buffer_);
rtp_packet.buffer_ = nullptr;
size_ = rtp_packet.size_;
rtp_packet.size_ = 0;
// TryToDecodeH264RtpPacket(buffer_);
}
return *this;
}
RtpPacket::~RtpPacket() {
if (buffer_) {
free(buffer_);
buffer_ = nullptr;
}
size_ = 0;
if (extension_data_) {
free(extension_data_);
extension_data_ = nullptr;
}
extension_len_ = 0;
payload_size_ = 0;
}
bool RtpPacket::Build(const uint8_t *buffer, uint32_t size) {
if (size > 0) {
buffer_ = (uint8_t *)malloc(size);
if (NULL == buffer_) {
LOG_ERROR("Malloc failed");
} else {
memcpy(buffer_, buffer, size);
}
size_ = size;
// TryToDecodeH264RtpPacket(buffer_);
return true;
}
return false;
}
const uint8_t *RtpPacket::Encode(uint8_t *payload, size_t payload_size) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
csrc_count_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < csrc_count_ && !csrcs_.empty(); index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
csrc_count_ && !csrcs_.empty() ? csrc_count_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t payload_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
memcpy(buffer_ + 12 + payload_offset, payload, payload_size);
size_ = payload_size + (12 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeH264Nalu(uint8_t *payload,
size_t payload_size) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
csrc_count_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < csrc_count_ && !csrcs_.empty(); index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
csrc_count_ && !csrcs_.empty() ? csrc_count_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t payload_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
buffer_[12 + payload_offset] = fu_indicator_.forbidden_bit << 7 |
fu_indicator_.nal_reference_idc << 6 |
fu_indicator_.nal_unit_type;
memcpy(buffer_ + 13 + payload_offset, payload, payload_size);
size_ = payload_size + (13 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeH264Fua(uint8_t *payload, size_t payload_size) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
csrc_count_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < csrc_count_ && !csrcs_.empty(); index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
csrc_count_ && !csrcs_.empty() ? csrc_count_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t payload_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
buffer_[12 + payload_offset] = fu_indicator_.forbidden_bit << 7 |
fu_indicator_.nal_reference_idc << 6 |
fu_indicator_.nal_unit_type;
buffer_[13 + payload_offset] = fu_header_.start << 7 | fu_header_.end << 6 |
fu_header_.remain_bit << 1 |
fu_header_.nal_unit_type;
memcpy(buffer_ + 14 + payload_offset, payload, payload_size);
size_ = payload_size + (14 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeH264FecSource(uint8_t *payload,
size_t payload_size,
uint8_t fec_symbol_id,
uint8_t fec_source_symbol_num) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
csrc_count_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < csrc_count_ && !csrcs_.empty(); index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
csrc_count_ && !csrcs_.empty() ? csrc_count_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t fec_symbol_id_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
buffer_[12 + fec_symbol_id_offset] = fec_symbol_id;
uint32_t fec_source_symbol_num_offset = fec_symbol_id_offset + 1;
buffer_[12 + fec_source_symbol_num_offset] = fec_source_symbol_num;
uint32_t payload_offset = fec_source_symbol_num_offset + 1;
buffer_[12 + payload_offset] = fu_indicator_.forbidden_bit << 7 |
fu_indicator_.nal_reference_idc << 6 |
fu_indicator_.nal_unit_type;
buffer_[13 + payload_offset] = fu_header_.start << 7 | fu_header_.end << 6 |
fu_header_.remain_bit << 1 |
fu_header_.nal_unit_type;
memcpy(buffer_ + 14 + payload_offset, payload, payload_size);
size_ = payload_size + (14 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeH264FecRepair(uint8_t *payload,
size_t payload_size,
uint8_t fec_symbol_id,
uint8_t fec_source_symbol_num) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
csrc_count_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < csrc_count_ && !csrcs_.empty(); index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
csrc_count_ && !csrcs_.empty() ? csrc_count_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t fec_symbol_id_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
buffer_[12 + fec_symbol_id_offset] = fec_symbol_id;
uint32_t fec_source_symbol_num_offset = fec_symbol_id_offset + 1;
buffer_[12 + fec_source_symbol_num_offset] = fec_source_symbol_num;
uint32_t payload_offset = fec_source_symbol_num_offset + 1;
buffer_[12 + payload_offset] = fu_indicator_.forbidden_bit << 7 |
fu_indicator_.nal_reference_idc << 6 |
fu_indicator_.nal_unit_type;
buffer_[13 + payload_offset] = fu_header_.start << 7 | fu_header_.end << 6 |
fu_header_.remain_bit << 1 |
fu_header_.nal_unit_type;
memcpy(buffer_ + 14 + payload_offset, payload, payload_size);
size_ = payload_size + (14 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeAv1(uint8_t *payload, size_t payload_size) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
csrc_count_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < csrc_count_ && !csrcs_.empty(); index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
csrc_count_ && !csrcs_.empty() ? csrc_count_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t aggr_header_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
memcpy(buffer_ + 12 + aggr_header_offset, &av1_aggr_header_, 1);
uint32_t payload_offset = aggr_header_offset;
memcpy(buffer_ + 13 + payload_offset, payload, payload_size);
size_ = payload_size + (13 + payload_offset);
return buffer_;
}
// ----------------------------------------------------------------------------
size_t RtpPacket::DecodeOpus(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
csrc_count_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < csrc_count_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = csrc_count_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, buffer_ + 16 + extension_offset,
// extension_len_);
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t payload_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
payload_size_ = size_ - (12 + payload_offset);
payload_ = buffer_ + 12 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeData(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
csrc_count_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < csrc_count_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = csrc_count_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, buffer_ + 16 + extension_offset,
// extension_len_);
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t payload_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
payload_size_ = size_ - (12 + payload_offset);
payload_ = buffer_ + 12 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeH264Nalu(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
csrc_count_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < csrc_count_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = csrc_count_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, buffer_ + 16 + extension_offset,
// extension_len_);
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t payload_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
fu_indicator_.forbidden_bit = (buffer_[12 + payload_offset] >> 7) & 0x01;
fu_indicator_.nal_reference_idc = (buffer_[12 + payload_offset] >> 5) & 0x03;
fu_indicator_.nal_unit_type = buffer_[12 + payload_offset] & 0x1F;
payload_size_ = size_ - (13 + payload_offset);
payload_ = buffer_ + 13 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeH264Fua(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
csrc_count_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < csrc_count_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = csrc_count_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t payload_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
fu_indicator_.forbidden_bit = (buffer_[12 + payload_offset] >> 7) & 0x01;
fu_indicator_.nal_reference_idc = (buffer_[12 + payload_offset] >> 5) & 0x03;
fu_indicator_.nal_unit_type = buffer_[12 + payload_offset] & 0x1F;
fu_header_.start = (buffer_[13 + payload_offset] >> 7) & 0x01;
fu_header_.end = (buffer_[13 + payload_offset] >> 6) & 0x01;
fu_header_.remain_bit = (buffer_[13 + payload_offset] >> 5) & 0x01;
fu_header_.nal_unit_type = buffer_[13 + payload_offset] & 0x1F;
payload_size_ = size_ - (14 + payload_offset);
payload_ = buffer_ + 14 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeH264FecSource(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
csrc_count_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < csrc_count_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = csrc_count_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t fec_symbol_id_offset =
extension_offset + (has_extension_ ? extension_len_ : 0);
fec_symbol_id_ = buffer_[12 + fec_symbol_id_offset];
uint32_t fec_source_symbol_num_offset = fec_symbol_id_offset + 1;
fec_source_symbol_num_ = buffer_[12 + fec_source_symbol_num_offset];
uint32_t payload_offset = fec_source_symbol_num_offset + 1;
fu_indicator_.forbidden_bit = (buffer_[12 + payload_offset] >> 7) & 0x01;
fu_indicator_.nal_reference_idc = (buffer_[12 + payload_offset] >> 5) & 0x03;
fu_indicator_.nal_unit_type = buffer_[12 + payload_offset] & 0x1F;
fu_header_.start = (buffer_[13 + payload_offset] >> 7) & 0x01;
fu_header_.end = (buffer_[13 + payload_offset] >> 6) & 0x01;
fu_header_.remain_bit = (buffer_[13 + payload_offset] >> 5) & 0x01;
fu_header_.nal_unit_type = buffer_[13 + payload_offset] & 0x1F;
payload_size_ = size_ - (14 + payload_offset);
payload_ = buffer_ + 14 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeH264FecRepair(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
csrc_count_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < csrc_count_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = csrc_count_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t fec_symbol_id_offset =
extension_offset + (has_extension_ ? extension_len_ : 0);
fec_symbol_id_ = buffer_[12 + fec_symbol_id_offset];
uint32_t fec_source_symbol_num_offset = fec_symbol_id_offset + 1;
fec_source_symbol_num_ = buffer_[12 + fec_source_symbol_num_offset];
uint32_t payload_offset = fec_source_symbol_num_offset + 1;
payload_size_ = size_ - (14 + payload_offset);
payload_ = buffer_ + 14 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeAv1(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
csrc_count_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < csrc_count_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = csrc_count_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, buffer_ + 16 + extension_offset,
// extension_len_);
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t aggr_header_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
av1_aggr_header_ = buffer_[12 + aggr_header_offset];
uint32_t payload_offset = aggr_header_offset;
payload_size_ = size_ - (13 + payload_offset);
payload_ = buffer_ + 13 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}

847
src/rtp/rtp_packet/rtp_packet.cpp
View File

@@ -2,792 +2,133 @@
#include <string>
void RtpPacket::TryToDecodeRtpPacket() {
if (PAYLOAD_TYPE::H264 == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
nal_unit_type_ = NAL_UNIT_TYPE(buffer_[12] & 0x1F);
if (NAL_UNIT_TYPE::NALU == nal_unit_type_) {
DecodeH264Nalu();
} else if (NAL_UNIT_TYPE::FU_A == nal_unit_type_) {
DecodeH264Fua();
}
} else if (PAYLOAD_TYPE::H264_FEC_SOURCE == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
nal_unit_type_ = NAL_UNIT_TYPE::FU_A;
DecodeH264FecSource();
} else if (PAYLOAD_TYPE::H264_FEC_REPAIR == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
DecodeH264FecRepair();
} else if (PAYLOAD_TYPE::AV1 == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
DecodeAv1();
} else if (PAYLOAD_TYPE::OPUS == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
DecodeOpus();
} else if (PAYLOAD_TYPE::DATA == PAYLOAD_TYPE(buffer_[1] & 0x7F)) {
DecodeData();
} else {
LOG_ERROR("Unknown pt: {}", (int)PAYLOAD_TYPE(buffer_[1] & 0x7F));
}
}
RtpPacket::RtpPacket() {}
void RtpPacket::ParseRtpData() {
if (!parsed_) {
TryToDecodeRtpPacket();
parsed_ = true;
}
}
RtpPacket::RtpPacket(const RtpPacket &rtp_packet) = default;
RtpPacket::RtpPacket() : buffer_(new uint8_t[DEFAULT_MTU]), size_(DEFAULT_MTU) {
memset(buffer_, 0, DEFAULT_MTU);
// ParseRtpData();
}
RtpPacket::RtpPacket(RtpPacket &&rtp_packet) = default;
RtpPacket::RtpPacket(uint32_t size) : buffer_(new uint8_t[size]), size_(size) {}
RtpPacket &RtpPacket::operator=(const RtpPacket &rtp_packet) = default;
RtpPacket::RtpPacket(const uint8_t *buffer, uint32_t size) {
if (size > 0) {
buffer_ = (uint8_t *)malloc(size);
if (NULL == buffer_) {
LOG_ERROR("Malloc failed");
} else {
memcpy(buffer_, buffer, size);
}
size_ = size;
RtpPacket &RtpPacket::operator=(RtpPacket &&rtp_packet) = default;
// TryToDecodeH264RtpPacket(buffer_);
ParseRtpData();
}
}
RtpPacket::RtpPacket(const RtpPacket &rtp_packet) {
if (rtp_packet.size_ > 0) {
buffer_ = (uint8_t *)malloc(rtp_packet.size_);
if (NULL == buffer_) {
LOG_ERROR("Malloc failed");
} else {
memcpy(buffer_, rtp_packet.buffer_, rtp_packet.size_);
}
size_ = rtp_packet.size_;
// TryToDecodeH264RtpPacket(buffer_);
ParseRtpData();
}
}
RtpPacket::RtpPacket(RtpPacket &&rtp_packet)
: buffer_((uint8_t *)std::move(rtp_packet.buffer_)),
size_(rtp_packet.size_) {
rtp_packet.buffer_ = nullptr;
rtp_packet.size_ = 0;
// TryToDecodeH264RtpPacket(buffer_);
ParseRtpData();
}
// RtpPacket &RtpPacket::operator=(const RtpPacket &rtp_packet) {
// if (&rtp_packet != this) {
// if (buffer_) {
// delete[] buffer_;
// buffer_ = nullptr;
// }
// buffer_ = new uint8_t[rtp_packet.size_];
// memcpy(buffer_, rtp_packet.buffer_, rtp_packet.size_);
// size_ = rtp_packet.size_;
// // TryToDecodeH264RtpPacket(buffer_);
// }
// return *this;
// }
RtpPacket &RtpPacket::operator=(const RtpPacket &rtp_packet) {
if (&rtp_packet != this) {
buffer_ = (uint8_t *)realloc(buffer_, rtp_packet.size_);
memcpy(buffer_, rtp_packet.buffer_, rtp_packet.size_);
size_ = rtp_packet.size_;
// TryToDecodeH264RtpPacket(buffer_);
}
return *this;
}
RtpPacket &RtpPacket::operator=(RtpPacket &&rtp_packet) {
if (&rtp_packet != this) {
buffer_ = std::move(rtp_packet.buffer_);
rtp_packet.buffer_ = nullptr;
size_ = rtp_packet.size_;
rtp_packet.size_ = 0;
// TryToDecodeH264RtpPacket(buffer_);
}
return *this;
}
RtpPacket::~RtpPacket() {
if (buffer_) {
free(buffer_);
buffer_ = nullptr;
}
size_ = 0;
if (extension_data_) {
free(extension_data_);
extension_data_ = nullptr;
}
extension_len_ = 0;
payload_size_ = 0;
}
RtpPacket::~RtpPacket() = default;
bool RtpPacket::Build(const uint8_t *buffer, uint32_t size) {
if (size > 0) {
buffer_ = (uint8_t *)malloc(size);
if (NULL == buffer_) {
LOG_ERROR("Malloc failed");
} else {
memcpy(buffer_, buffer, size);
}
buffer_.SetData(buffer, size);
size_ = size;
// TryToDecodeH264RtpPacket(buffer_);
return true;
}
return false;
}
const uint8_t *RtpPacket::Encode(uint8_t *payload, size_t payload_size) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
total_csrc_number_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < total_csrc_number_ && !csrcs_.empty();
index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
bool RtpPacket::Parse(const uint8_t *buffer, uint32_t size) {
if (size < kFixedHeaderSize) {
LOG_WARN("RtpPacket::Parse: size is too small");
return false;
}
uint32_t extension_offset =
total_csrc_number_ && !csrcs_.empty() ? total_csrc_number_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
// 1st byte
version_ = (buffer_[payload_offset_] >> 6) & 0x03;
if (version_ != kRtpVersion) {
LOG_WARN("RtpPacket::Parse: version is not qual to kRtpVersion");
return false;
}
has_padding_ = (buffer_[payload_offset_] >> 5) & 0x01;
has_extension_ = (buffer_[payload_offset_] >> 4) & 0x01;
csrc_count_ = buffer_[payload_offset_] & 0x0f;
if (csrc_count_ > kMaxRtpCsrcSize) {
LOG_WARN("RtpPacket::Parse: csrc count is too large");
return false;
}
uint32_t payload_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
// 2nd byte
marker_ = (buffer_[payload_offset_] >> 7) & 0x01;
payload_type_ = buffer_[payload_offset_] & 0x7f;
memcpy(buffer_ + 12 + payload_offset, payload, payload_size);
size_ = payload_size + (12 + payload_offset);
// 3rd byte and 4th byte
sequence_number_ =
(buffer_[payload_offset_] << 8) | buffer_[payload_offset_ + 1];
return buffer_;
}
const uint8_t *RtpPacket::EncodeH264Nalu(uint8_t *payload,
size_t payload_size) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
total_csrc_number_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < total_csrc_number_ && !csrcs_.empty();
index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
total_csrc_number_ && !csrcs_.empty() ? total_csrc_number_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t payload_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
buffer_[12 + payload_offset] = fu_indicator_.forbidden_bit << 7 |
fu_indicator_.nal_reference_idc << 6 |
fu_indicator_.nal_unit_type;
memcpy(buffer_ + 13 + payload_offset, payload, payload_size);
size_ = payload_size + (13 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeH264Fua(uint8_t *payload, size_t payload_size) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
total_csrc_number_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < total_csrc_number_ && !csrcs_.empty();
index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
total_csrc_number_ && !csrcs_.empty() ? total_csrc_number_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t payload_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
buffer_[12 + payload_offset] = fu_indicator_.forbidden_bit << 7 |
fu_indicator_.nal_reference_idc << 6 |
fu_indicator_.nal_unit_type;
buffer_[13 + payload_offset] = fu_header_.start << 7 | fu_header_.end << 6 |
fu_header_.remain_bit << 1 |
fu_header_.nal_unit_type;
memcpy(buffer_ + 14 + payload_offset, payload, payload_size);
size_ = payload_size + (14 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeH264FecSource(uint8_t *payload,
size_t payload_size,
uint8_t fec_symbol_id,
uint8_t fec_source_symbol_num) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
total_csrc_number_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < total_csrc_number_ && !csrcs_.empty();
index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
total_csrc_number_ && !csrcs_.empty() ? total_csrc_number_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t fec_symbol_id_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
buffer_[12 + fec_symbol_id_offset] = fec_symbol_id;
uint32_t fec_source_symbol_num_offset = fec_symbol_id_offset + 1;
buffer_[12 + fec_source_symbol_num_offset] = fec_source_symbol_num;
uint32_t payload_offset = fec_source_symbol_num_offset + 1;
buffer_[12 + payload_offset] = fu_indicator_.forbidden_bit << 7 |
fu_indicator_.nal_reference_idc << 6 |
fu_indicator_.nal_unit_type;
buffer_[13 + payload_offset] = fu_header_.start << 7 | fu_header_.end << 6 |
fu_header_.remain_bit << 1 |
fu_header_.nal_unit_type;
memcpy(buffer_ + 14 + payload_offset, payload, payload_size);
size_ = payload_size + (14 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeH264FecRepair(uint8_t *payload,
size_t payload_size,
uint8_t fec_symbol_id,
uint8_t fec_source_symbol_num) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
total_csrc_number_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < total_csrc_number_ && !csrcs_.empty();
index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
total_csrc_number_ && !csrcs_.empty() ? total_csrc_number_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t fec_symbol_id_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
buffer_[12 + fec_symbol_id_offset] = fec_symbol_id;
uint32_t fec_source_symbol_num_offset = fec_symbol_id_offset + 1;
buffer_[12 + fec_source_symbol_num_offset] = fec_source_symbol_num;
uint32_t payload_offset = fec_source_symbol_num_offset + 1;
buffer_[12 + payload_offset] = fu_indicator_.forbidden_bit << 7 |
fu_indicator_.nal_reference_idc << 6 |
fu_indicator_.nal_unit_type;
buffer_[13 + payload_offset] = fu_header_.start << 7 | fu_header_.end << 6 |
fu_header_.remain_bit << 1 |
fu_header_.nal_unit_type;
memcpy(buffer_ + 14 + payload_offset, payload, payload_size);
size_ = payload_size + (14 + payload_offset);
return buffer_;
}
const uint8_t *RtpPacket::EncodeAv1(uint8_t *payload, size_t payload_size) {
buffer_[0] = (version_ << 6) | (has_padding_ << 5) | (has_extension_ << 4) |
total_csrc_number_;
buffer_[1] = (marker_ << 7) | payload_type_;
buffer_[2] = (sequence_number_ >> 8) & 0xFF;
buffer_[3] = sequence_number_ & 0xFF;
buffer_[4] = (timestamp_ >> 24) & 0xFF;
buffer_[5] = (timestamp_ >> 16) & 0xFF;
buffer_[6] = (timestamp_ >> 8) & 0xFF;
buffer_[7] = timestamp_ & 0xFF;
buffer_[8] = (ssrc_ >> 24) & 0xFF;
buffer_[9] = (ssrc_ >> 16) & 0xFF;
buffer_[10] = (ssrc_ >> 8) & 0xFF;
buffer_[11] = ssrc_ & 0xFF;
for (uint32_t index = 0; index < total_csrc_number_ && !csrcs_.empty();
index++) {
buffer_[12 + index] = (csrcs_[index] >> 24) & 0xFF;
buffer_[13 + index] = (csrcs_[index] >> 16) & 0xFF;
buffer_[14 + index] = (csrcs_[index] >> 8) & 0xFF;
buffer_[15 + index] = csrcs_[index] & 0xFF;
}
uint32_t extension_offset =
total_csrc_number_ && !csrcs_.empty() ? total_csrc_number_ * 4 : 0;
if (has_extension_ && extension_data_) {
buffer_[12 + extension_offset] = extension_profile_ >> 8;
buffer_[13 + extension_offset] = extension_profile_ & 0xff;
buffer_[14 + extension_offset] = (extension_len_ >> 8) & 0xFF;
buffer_[15 + extension_offset] = extension_len_ & 0xFF;
memcpy(buffer_ + 16 + extension_offset, extension_data_, extension_len_);
}
uint32_t aggr_header_offset =
(has_extension_ && extension_data_ ? extension_len_ : 0) +
extension_offset;
memcpy(buffer_ + 12 + aggr_header_offset, &av1_aggr_header_, 1);
uint32_t payload_offset = aggr_header_offset;
memcpy(buffer_ + 13 + payload_offset, payload, payload_size);
size_ = payload_size + (13 + payload_offset);
return buffer_;
}
// ----------------------------------------------------------------------------
size_t RtpPacket::DecodeOpus(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
total_csrc_number_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
// 5th byte to 8th byte
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
(buffer_[payload_offset_] << 24) | (buffer_[payload_offset_ + 1] << 16) |
(buffer_[payload_offset_ + 2] << 8) | buffer_[payload_offset_ + 3];
for (uint32_t index = 0; index < total_csrc_number_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
// 9th byte to 12th byte
ssrc_ = (buffer_[payload_offset_] << 24) |
(buffer_[payload_offset_ + 1] << 16) |
(buffer_[payload_offset_ + 2] << 8) | buffer_[payload_offset_ + 3];
payload_offset_ = kFixedHeaderSize;
if (kFixedHeaderSize + csrc_count_ * 4 > size) {
LOG_WARN("RtpPacket::Parse: csrc count is too large");
return false;
}
// csrc
for (uint32_t csrc_index = 0; i < csrc_count_; i++) {
uint32_t csrc = (buffer_[payload_offset_ + csrc_index * 4] << 24) |
(buffer_[payload_offset_ + 1 + csrc_index * 4] << 16) |
(buffer_[payload_offset_ + 2 + csrc_index * 4] << 8) |
buffer_[payload_offset_ + 3 + csrc_index * 4];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = total_csrc_number_ * 4;
payload_offset_ = kFixedHeaderSize + csrc_count_ * 4;
if (payload_offset_ > size) {
LOG_WARN("RtpPacket::Parse: payload offset is too large");
return false;
}
// extensions
if (has_extension_) {
if (payload_offset_ + 4 > size) {
LOG_WARN("RtpPacket::Parse: extension profile is too large");
return false;
}
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
(buffer_[payload_offset_] << 8) | buffer_[payload_offset_ + 1];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
(buffer_[payload_offset_ + 2] << 8) | buffer_[payload_offset_ + 3];
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, buffer_ + 16 + extension_offset,
// extension_len_);
extension_data_ = buffer_ + 16 + extension_offset;
if (payload_offset_ + 4 + extension_len_ > size) {
LOG_WARN("RtpPacket::Parse: extension len is too large");
return false;
}
size_t offset = payload_offset_ + 4;
while (offset < size && extension_len_ > 0) {
uint8_t id = buffer_[offset] >> 4;
uint8_t len = (buffer_[offset] & 0x0F) + 1;
if (offset + 1 + len > size) {
break;
}
extensions_.push_back(
{id, std::vector<uint8_t>(buffer_ + offset + 1,
buffer_ + offset + 1 + len)});
offset += 1 + len;
}
payload_offset_ += (4 + extension_len_);
}
uint32_t payload_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
payload_size_ = size_ - (12 + payload_offset);
payload_ = buffer_ + 12 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
if (has_padding_ && payload_offset_ < size) {
padding_size_ = buffer[size - 1];
if (padding_size_ == 0) {
LOG_WARN("Padding was set, but padding size is zero");
return false;
}
} else {
padding_size_ = 0;
}
return payload_size_;
}
size_t RtpPacket::DecodeData(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
total_csrc_number_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < total_csrc_number_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
// payload
if (payload_offset_ + padding_size_ > size) {
LOG_WARN("RtpPacket::Parse: payload size is too large");
return false;
}
payload_size_ = size - payload_offset_ - padding_size_;
uint32_t extension_offset = total_csrc_number_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, buffer_ + 16 + extension_offset,
// extension_len_);
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t payload_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
payload_size_ = size_ - (12 + payload_offset);
payload_ = buffer_ + 12 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeH264Nalu(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
total_csrc_number_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < total_csrc_number_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = total_csrc_number_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, buffer_ + 16 + extension_offset,
// extension_len_);
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t payload_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
fu_indicator_.forbidden_bit = (buffer_[12 + payload_offset] >> 7) & 0x01;
fu_indicator_.nal_reference_idc = (buffer_[12 + payload_offset] >> 5) & 0x03;
fu_indicator_.nal_unit_type = buffer_[12 + payload_offset] & 0x1F;
payload_size_ = size_ - (13 + payload_offset);
payload_ = buffer_ + 13 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeH264Fua(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
total_csrc_number_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < total_csrc_number_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = total_csrc_number_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t payload_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
fu_indicator_.forbidden_bit = (buffer_[12 + payload_offset] >> 7) & 0x01;
fu_indicator_.nal_reference_idc = (buffer_[12 + payload_offset] >> 5) & 0x03;
fu_indicator_.nal_unit_type = buffer_[12 + payload_offset] & 0x1F;
fu_header_.start = (buffer_[13 + payload_offset] >> 7) & 0x01;
fu_header_.end = (buffer_[13 + payload_offset] >> 6) & 0x01;
fu_header_.remain_bit = (buffer_[13 + payload_offset] >> 5) & 0x01;
fu_header_.nal_unit_type = buffer_[13 + payload_offset] & 0x1F;
payload_size_ = size_ - (14 + payload_offset);
payload_ = buffer_ + 14 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeH264FecSource(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
total_csrc_number_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < total_csrc_number_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = total_csrc_number_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t fec_symbol_id_offset =
extension_offset + (has_extension_ ? extension_len_ : 0);
fec_symbol_id_ = buffer_[12 + fec_symbol_id_offset];
uint32_t fec_source_symbol_num_offset = fec_symbol_id_offset + 1;
fec_source_symbol_num_ = buffer_[12 + fec_source_symbol_num_offset];
uint32_t payload_offset = fec_source_symbol_num_offset + 1;
fu_indicator_.forbidden_bit = (buffer_[12 + payload_offset] >> 7) & 0x01;
fu_indicator_.nal_reference_idc = (buffer_[12 + payload_offset] >> 5) & 0x03;
fu_indicator_.nal_unit_type = buffer_[12 + payload_offset] & 0x1F;
fu_header_.start = (buffer_[13 + payload_offset] >> 7) & 0x01;
fu_header_.end = (buffer_[13 + payload_offset] >> 6) & 0x01;
fu_header_.remain_bit = (buffer_[13 + payload_offset] >> 5) & 0x01;
fu_header_.nal_unit_type = buffer_[13 + payload_offset] & 0x1F;
payload_size_ = size_ - (14 + payload_offset);
payload_ = buffer_ + 14 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeH264FecRepair(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
total_csrc_number_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < total_csrc_number_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = total_csrc_number_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t fec_symbol_id_offset =
extension_offset + (has_extension_ ? extension_len_ : 0);
fec_symbol_id_ = buffer_[12 + fec_symbol_id_offset];
uint32_t fec_source_symbol_num_offset = fec_symbol_id_offset + 1;
fec_source_symbol_num_ = buffer_[12 + fec_source_symbol_num_offset];
uint32_t payload_offset = fec_source_symbol_num_offset + 1;
payload_size_ = size_ - (14 + payload_offset);
payload_ = buffer_ + 14 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
}
size_t RtpPacket::DecodeAv1(uint8_t *payload) {
version_ = (buffer_[0] >> 6) & 0x03;
has_padding_ = (buffer_[0] >> 5) & 0x01;
has_extension_ = (buffer_[0] >> 4) & 0x01;
total_csrc_number_ = buffer_[0] & 0x0f;
marker_ = (buffer_[1] >> 7) & 0x01;
payload_type_ = buffer_[1] & 0x7f;
sequence_number_ = (buffer_[2] << 8) | buffer_[3];
timestamp_ =
(buffer_[4] << 24) | (buffer_[5] << 16) | (buffer_[6] << 8) | buffer_[7];
ssrc_ = (buffer_[8] << 24) | (buffer_[9] << 16) | (buffer_[10] << 8) |
buffer_[11];
for (uint32_t index = 0; index < total_csrc_number_; index++) {
uint32_t csrc = (buffer_[12 + index] << 24) | (buffer_[13 + index] << 16) |
(buffer_[14 + index] << 8) | buffer_[15 + index];
csrcs_.push_back(csrc);
}
uint32_t extension_offset = total_csrc_number_ * 4;
if (has_extension_) {
extension_profile_ =
(buffer_[12 + extension_offset] << 8) | buffer_[13 + extension_offset];
extension_len_ =
(buffer_[14 + extension_offset] << 8) | buffer_[15 + extension_offset];
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, buffer_ + 16 + extension_offset,
// extension_len_);
extension_data_ = buffer_ + 16 + extension_offset;
}
uint32_t aggr_header_offset =
(has_extension_ ? extension_len_ : 0) + extension_offset;
av1_aggr_header_ = buffer_[12 + aggr_header_offset];
uint32_t payload_offset = aggr_header_offset;
payload_size_ = size_ - (13 + payload_offset);
payload_ = buffer_ + 13 + payload_offset;
if (payload) {
memcpy(payload, payload_, payload_size_);
}
return payload_size_;
return true;
}

266
src/rtp/rtp_packet/rtp_packet.h
View File

@@ -6,7 +6,9 @@
#include <cstring>
#include <vector>
#include "copy_on_write_buffer.h"
#include "log.h"
#include "rtp_header.h"
// Common
// 0 1 2 3
@@ -180,12 +182,13 @@ class RtpPacket {
DATA = 127
} PAYLOAD_TYPE;
typedef enum { UNKNOWN = 0, NALU = 1, FU_A = 28, FU_B = 29 } NAL_UNIT_TYPE;
constexpr uint16_t kOneByteExtensionProfileId = 0xBEDE;
constexpr uint16_t kTwoByteExtensionProfileId = 0x1000;
constexpr size_t kFixedHeaderSize = 12;
public:
RtpPacket();
RtpPacket(uint32_t size);
RtpPacket(const uint8_t *buffer, uint32_t size);
RtpPacket(const RtpPacket &rtp_packet);
RtpPacket(RtpPacket &&rtp_packet);
RtpPacket &operator=(const RtpPacket &rtp_packet);
@@ -212,15 +215,6 @@ class RtpPacket {
void SetSsrc(uint32_t ssrc) { ssrc_ = ssrc; }
void SetCsrcs(std::vector<uint32_t> &csrcs) { csrcs_ = csrcs; }
void SetExtensionProfile(uint16_t extension_profile) {
// extension_profile_ = extension_profile;
}
void SetExtensionData(uint8_t *extension_data, uint16_t extension_len) {
// extension_len_ = extension_len;
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, extension_data, extension_len_);
}
void SetAbsoluteSendTimestamp(uint32_t abs_send_time) {
// Absolute Send Time is a 24-bit field, we need to ensure it fits in 24
// bits
@@ -235,7 +229,7 @@ class RtpPacket {
}
// Set the extension profile to 0xBEDE (one-byte header)
extension_profile_ = 0xBEDE;
extension_profile_ = kOneByteExtensionProfileId;
// Set the length of the extension data (in 32-bit words minus one)
extension_data_[0] = 0x00;
@@ -247,238 +241,74 @@ class RtpPacket {
extension_data_[4] = abs_send_time & 0xFF;
}
public:
typedef struct {
uint8_t forbidden_bit : 1;
uint8_t nal_reference_idc : 2;
uint8_t nal_unit_type : 5;
} FU_INDICATOR;
typedef struct {
uint8_t start : 1;
uint8_t end : 1;
uint8_t remain_bit : 1;
uint8_t nal_unit_type : 5;
} FU_HEADER;
void SetFuIndicator(FU_INDICATOR fu_indicator) {
fu_indicator_.forbidden_bit = fu_indicator.forbidden_bit;
fu_indicator_.nal_reference_idc = fu_indicator.nal_reference_idc;
fu_indicator_.nal_unit_type = fu_indicator.nal_unit_type;
}
void SetFuHeader(FU_HEADER fu_header) {
fu_header_.start = fu_header.start;
fu_header_.end = fu_header.end;
fu_header_.remain_bit = fu_header.remain_bit;
fu_header_.nal_unit_type = fu_header.nal_unit_type;
}
void SetAv1AggrHeader(int z, int y, int w, int n) {
if (z) av1_aggr_header_ |= (1 << 7);
if (y) av1_aggr_header_ |= (1 << 6);
if (w) av1_aggr_header_ |= w << 4;
if (n) av1_aggr_header_ |= (1 << 3);
}
void SetFecSymbolId(uint8_t fec_symbol_id) { fec_symbol_id_ = fec_symbol_id; }
public:
const uint8_t *Encode(uint8_t *payload, size_t payload_size);
const uint8_t *EncodeH264Nalu(uint8_t *payload, size_t payload_size);
const uint8_t *EncodeH264Fua(uint8_t *payload, size_t payload_size);
const uint8_t *EncodeH264FecSource(uint8_t *payload, size_t payload_size,
uint8_t fec_symbol_id,
uint8_t fec_source_symbol_num);
const uint8_t *EncodeH264FecRepair(uint8_t *payload, size_t payload_size,
uint8_t fec_symbol_id,
uint8_t fec_source_symbol_num);
const uint8_t *EncodeAv1(uint8_t *payload, size_t payload_size);
size_t DecodeData(uint8_t *payload = nullptr);
size_t DecodeH264Nalu(uint8_t *payload = nullptr);
size_t DecodeH264Fua(uint8_t *payload = nullptr);
size_t DecodeH264FecSource(uint8_t *payload = nullptr);
size_t DecodeH264FecRepair(uint8_t *payload = nullptr);
size_t DecodeAv1(uint8_t *payload = nullptr);
size_t DecodeOpus(uint8_t *payload = nullptr);
public:
// Get Header
uint32_t Verion() const {
// // ParseRtpData();
return version_;
}
bool HasPadding() const {
// ParseRtpData();
return has_padding_;
}
bool HasExtension() const {
// ParseRtpData();
return has_extension_;
}
bool Marker() const {
// // ParseRtpData();
return marker_;
}
PAYLOAD_TYPE PayloadType() const {
// ParseRtpData();
return PAYLOAD_TYPE(payload_type_);
}
uint16_t SequenceNumber() const {
// ParseRtpData();
return sequence_number_;
}
uint64_t Timestamp() const {
// ParseRtpData();
return timestamp_;
}
uint32_t Ssrc() const {
// ParseRtpData();
return ssrc_;
}
std::vector<uint32_t> Csrcs() const {
// ParseRtpData();
return csrcs_;
};
uint16_t ExtensionProfile() const {
// ParseRtpData();
return extension_profile_;
}
const uint8_t *ExtensionData() {
// ParseRtpData();
return extension_data_;
}
uint32_t GetAbsoluteSendTimestamp(uint32_t *abs_send_time) const {
if (extension_data_ == nullptr || extension_len_ < 4) {
return 0;
}
// Absolute Send Time is a 24-bit field
*abs_send_time = (extension_data_[2] << 16) | (extension_data_[3] << 8) |
extension_data_[4];
return *abs_send_time;
}
uint8_t FecSymbolId() { return fec_symbol_id_; }
uint8_t FecSourceSymbolNum() { return fec_source_symbol_num_; }
void GetAv1AggrHeader(int &z, int &y, int &w, int &n) {
z = av1_aggr_header_ >> 7;
y = av1_aggr_header_ >> 6 & 0x01;
w = av1_aggr_header_ >> 4 & 0x03;
n = av1_aggr_header_ >> 3 & 0x01;
}
uint32_t Verion() const { return version_; }
bool HasPadding() const { return has_padding_; }
bool HasExtension() const { return has_extension_; }
bool Marker() const { return marker_; }
PAYLOAD_TYPE PayloadType() const { return PAYLOAD_TYPE(payload_type_); }
uint16_t SequenceNumber() const { return sequence_number_; }
uint64_t Timestamp() const { return timestamp_; }
uint32_t Ssrc() const { return ssrc_; }
std::vector<uint32_t> Csrcs() const { return csrcs_; };
uint16_t ExtensionProfile() const { return extension_profile_; }
const uint8_t *ExtensionData() { return extension_data_; }
// Payload
const uint8_t *Payload() {
// ParseRtpData();
return payload_;
};
size_t PayloadSize() {
// ParseRtpData();
return payload_size_;
}
size_t headers_size() const { return 12; }
size_t payload_size() const { return payload_size_; }
bool has_padding() const { return buffer_[0] & 0x20; }
size_t padding_size() const { return padding_size_; }
const uint8_t *Payload() { return Buffer() + payload_offset_; };
size_t PayloadSize() { return payload_size_; }
// Entire RTP buffer
const uint8_t *Buffer() const { return buffer_; }
size_t Size() const { return size_; }
// For webrtc module use
size_t headers_size() const { return payload_offset_; }
size_t payload_size() const { return payload_size_; }
bool has_padding() const { return buffer_[0] & 0x20; }
size_t padding_size() const { return padding_size_; }
size_t size() const { return size_; }
// NAL
NAL_UNIT_TYPE NalUnitType() {
// ParseRtpData();
return nal_unit_type_;
}
bool FuAStart() {
// ParseRtpData();
return fu_header_.start;
}
bool FuAEnd() {
// ParseRtpData();
return fu_header_.end;
}
bool Av1FrameStart() {
// ParseRtpData();
int z, y, w, n;
GetAv1AggrHeader(z, y, w, n);
// return !z && !y;
if (z == 0 && y == 0 && w == 1) {
return true;
} else if (z == 0 && y == 1 && w == 1) {
return true;
} else {
return false;
}
}
bool Av1FrameEnd() {
// ParseRtpData();
int z, y, w, n;
GetAv1AggrHeader(z, y, w, n);
// return z && !y;
if (z == 0 && y == 0 && w == 1) {
return true;
} else if (z == 1 && y == 0 && w == 1) {
return true;
} else {
return false;
}
}
private:
void TryToDecodeRtpPacket();
void ParseRtpData();
private:
// Header
// Common header
uint8_t version_ = 0;
bool has_padding_ = false;
bool has_extension_ = false;
uint8_t total_csrc_number_ = 0;
uint8_t csrc_count_ = 0;
bool marker_ = false;
uint8_t payload_type_ = 0;
uint16_t sequence_number_ = 1;
uint64_t timestamp_ = 0;
uint32_t ssrc_ = 0;
std::vector<uint32_t> csrcs_;
uint16_t profile_ = 0;
// Extension header
uint16_t extension_profile_ = 0;
uint16_t extension_len_ = 0;
uint8_t *extension_data_ = nullptr;
struct Extension {
uint8_t id;
std::vector<uint8_t> data;
};
std::vector<Extension> extensions_;
// Payload
size_t payload_offset_ = 0;
size_t payload_size_ = 0;
// Padding
size_t padding_size_ = 0;
// Entire rtp buffer
CopyOnWriteBuffer buffer_ = nullptr;
size_t size_ = 0;
// H.264 header
FU_INDICATOR fu_indicator_;
FU_HEADER fu_header_;
uint8_t fec_symbol_id_ = 0;
uint8_t fec_source_symbol_num_ = 0;
uint8_t av1_aggr_header_ = 0;
// Payload
uint8_t *payload_ = nullptr;
size_t payload_size_ = 0;
size_t padding_size_ = 0;
// Entire RTP buffer
uint8_t *buffer_ = nullptr;
size_t size_ = 0;
// NAL
NAL_UNIT_TYPE nal_unit_type_ = NAL_UNIT_TYPE::UNKNOWN;
bool parsed_ = false;
};
#endif

484
src/rtp/rtp_packet/rtp_packet.hxx Normal file
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@@ -0,0 +1,484 @@
#ifndef _RTP_PACKET_H_
#define _RTP_PACKET_H_
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <vector>
#include "log.h"
// Common
// 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 |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | defined by profile | length |x
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Extensions |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | Payload |
// | .... : padding... |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | padding | Padding size |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// H264
// 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 |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | defined by profile | length |x
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Extensions |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | FU indicator | FU header | |
// | |
// | FU Payload |
// | |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | padding | Padding size |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | FU indicator | FU header |
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |F|NRI| Type |S|E|R| Type |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// H264 FEC source symbol
// 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 |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | defined by profile | length |x
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Extensions |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | FEC symbol id | src sym num | FU indicator | FU header |
// | |
// | FU Payload |
// | |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | padding | Padding size |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// H264 FEC repair symbol
// 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 |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | defined by profile | length |x
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Extensions |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | FEC symbol id | src sym num | |
// | |
// | Fec Payload |
// | |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | padding | Padding size |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// AV1
// 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 |x
// | .... |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | 0x100 | 0x0 | extensions length |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | ID | hdr_length | |x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ |x
// | |x
// | dependency descriptor (hdr_length #bytes) |x
// | |x
// | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | | Other rtp header extensions...|x
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | AV1 aggr hdr | |
// +-+-+-+-+-+-+-+-+ |
// | |
// | Bytes 2..N of AV1 payload |
// | |
// | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | : OPTIONAL RTP padding |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | AV1 aggr hdr |
//
// Z=1: first obu element is an obu fragment that is a continuation of an OBU
// fragment from the previous packet.
//
// Y=1: the last OBU element is an OBU fragment that will continue in the next
// packet.
//
// W=1: two bit field that describes the number of OBU elements in the packet.
//
// N=1: the packet is the first packet of a coded video sequence.
//
// 0 1 2 3 4 5 6 7
// +-+-+-+-+-+-+-+-+
// |Z|Y| W |N|-|-|-|
// +-+-+-+-+-+-+-+-+
#define DEFAULT_MTU 1500
#define MAX_NALU_LEN 1400
class RtpPacket {
public:
typedef enum {
UNDEFINED = 0,
H264 = 96,
H264_FEC_SOURCE = 97,
H264_FEC_REPAIR = 98,
AV1 = 99,
OPUS = 111,
DATA = 127
} PAYLOAD_TYPE;
typedef enum { UNKNOWN = 0, NALU = 1, FU_A = 28, FU_B = 29 } NAL_UNIT_TYPE;
public:
RtpPacket();
RtpPacket(uint32_t size);
RtpPacket(const uint8_t *buffer, uint32_t size);
RtpPacket(const RtpPacket &rtp_packet);
RtpPacket(RtpPacket &&rtp_packet);
RtpPacket &operator=(const RtpPacket &rtp_packet);
RtpPacket &operator=(RtpPacket &&rtp_packet);
virtual ~RtpPacket();
public:
bool Build(const uint8_t *buffer, uint32_t size);
public:
// Set Header
void SetVerion(uint8_t version) { version_ = version; }
void SetHasPadding(bool has_padding) { has_padding_ = has_padding; }
void SetHasExtension(bool has_extension) { has_extension_ = has_extension; }
void SetMarker(bool marker) { marker_ = marker; }
void SetPayloadType(PAYLOAD_TYPE payload_type) {
payload_type_ = (uint8_t)payload_type;
}
void SetSequenceNumber(uint16_t sequence_number) {
sequence_number_ = sequence_number;
}
void SetTimestamp(uint64_t timestamp) { timestamp_ = timestamp; }
void SetSsrc(uint32_t ssrc) { ssrc_ = ssrc; }
void SetCsrcs(std::vector<uint32_t> &csrcs) { csrcs_ = csrcs; }
void SetExtensionProfile(uint16_t extension_profile) {
// extension_profile_ = extension_profile;
}
void SetExtensionData(uint8_t *extension_data, uint16_t extension_len) {
// extension_len_ = extension_len;
// extension_data_ = new uint8_t[extension_len_];
// memcpy(extension_data_, extension_data, extension_len_);
}
void SetAbsoluteSendTimestamp(uint32_t abs_send_time) {
// Absolute Send Time is a 24-bit field, we need to ensure it fits in 24
// bits
abs_send_time &= 0x00FFFFFF;
// Allocate memory for the extension data if not already allocated
if (extension_data_ == nullptr) {
extension_data_ =
(uint8_t *)malloc(5); // 2 bytes for profile, 2 bytes for length, 3
// bytes for abs_send_time
extension_len_ = 5;
}
// Set the extension profile to 0xBEDE (one-byte header)
extension_profile_ = 0xBEDE;
// Set the length of the extension data (in 32-bit words minus one)
extension_data_[0] = 0x00;
extension_data_[1] = 0x02; // 2 words (8 bytes)
// Set the absolute send time in the extension data
extension_data_[2] = (abs_send_time >> 16) & 0xFF;
extension_data_[3] = (abs_send_time >> 8) & 0xFF;
extension_data_[4] = abs_send_time & 0xFF;
}
public:
typedef struct {
uint8_t forbidden_bit : 1;
uint8_t nal_reference_idc : 2;
uint8_t nal_unit_type : 5;
} FU_INDICATOR;
typedef struct {
uint8_t start : 1;
uint8_t end : 1;
uint8_t remain_bit : 1;
uint8_t nal_unit_type : 5;
} FU_HEADER;
void SetFuIndicator(FU_INDICATOR fu_indicator) {
fu_indicator_.forbidden_bit = fu_indicator.forbidden_bit;
fu_indicator_.nal_reference_idc = fu_indicator.nal_reference_idc;
fu_indicator_.nal_unit_type = fu_indicator.nal_unit_type;
}
void SetFuHeader(FU_HEADER fu_header) {
fu_header_.start = fu_header.start;
fu_header_.end = fu_header.end;
fu_header_.remain_bit = fu_header.remain_bit;
fu_header_.nal_unit_type = fu_header.nal_unit_type;
}
void SetAv1AggrHeader(int z, int y, int w, int n) {
if (z) av1_aggr_header_ |= (1 << 7);
if (y) av1_aggr_header_ |= (1 << 6);
if (w) av1_aggr_header_ |= w << 4;
if (n) av1_aggr_header_ |= (1 << 3);
}
void SetFecSymbolId(uint8_t fec_symbol_id) { fec_symbol_id_ = fec_symbol_id; }
public:
const uint8_t *Encode(uint8_t *payload, size_t payload_size);
const uint8_t *EncodeH264Nalu(uint8_t *payload, size_t payload_size);
const uint8_t *EncodeH264Fua(uint8_t *payload, size_t payload_size);
const uint8_t *EncodeH264FecSource(uint8_t *payload, size_t payload_size,
uint8_t fec_symbol_id,
uint8_t fec_source_symbol_num);
const uint8_t *EncodeH264FecRepair(uint8_t *payload, size_t payload_size,
uint8_t fec_symbol_id,
uint8_t fec_source_symbol_num);
const uint8_t *EncodeAv1(uint8_t *payload, size_t payload_size);
size_t DecodeData(uint8_t *payload = nullptr);
size_t DecodeH264Nalu(uint8_t *payload = nullptr);
size_t DecodeH264Fua(uint8_t *payload = nullptr);
size_t DecodeH264FecSource(uint8_t *payload = nullptr);
size_t DecodeH264FecRepair(uint8_t *payload = nullptr);
size_t DecodeAv1(uint8_t *payload = nullptr);
size_t DecodeOpus(uint8_t *payload = nullptr);
public:
// Get Header
uint32_t Verion() const {
// // ParseRtpData();
return version_;
}
bool HasPadding() const {
// ParseRtpData();
return has_padding_;
}
bool HasExtension() const {
// ParseRtpData();
return has_extension_;
}
bool Marker() const {
// // ParseRtpData();
return marker_;
}
PAYLOAD_TYPE PayloadType() const {
// ParseRtpData();
return PAYLOAD_TYPE(payload_type_);
}
uint16_t SequenceNumber() const {
// ParseRtpData();
return sequence_number_;
}
uint64_t Timestamp() const {
// ParseRtpData();
return timestamp_;
}
uint32_t Ssrc() const {
// ParseRtpData();
return ssrc_;
}
std::vector<uint32_t> Csrcs() const {
// ParseRtpData();
return csrcs_;
};
uint16_t ExtensionProfile() const {
// ParseRtpData();
return extension_profile_;
}
const uint8_t *ExtensionData() {
// ParseRtpData();
return extension_data_;
}
uint32_t GetAbsoluteSendTimestamp(uint32_t *abs_send_time) const {
if (extension_data_ == nullptr || extension_len_ < 4) {
return 0;
}
// Absolute Send Time is a 24-bit field
*abs_send_time = (extension_data_[2] << 16) | (extension_data_[3] << 8) |
extension_data_[4];
return *abs_send_time;
}
uint8_t FecSymbolId() { return fec_symbol_id_; }
uint8_t FecSourceSymbolNum() { return fec_source_symbol_num_; }
void GetAv1AggrHeader(int &z, int &y, int &w, int &n) {
z = av1_aggr_header_ >> 7;
y = av1_aggr_header_ >> 6 & 0x01;
w = av1_aggr_header_ >> 4 & 0x03;
n = av1_aggr_header_ >> 3 & 0x01;
}
// Payload
const uint8_t *Payload() {
// ParseRtpData();
return payload_;
};
size_t PayloadSize() {
// ParseRtpData();
return payload_size_;
}
size_t headers_size() const { return 12; }
size_t payload_size() const { return payload_size_; }
bool has_padding() const { return buffer_[0] & 0x20; }
size_t padding_size() const { return padding_size_; }
// Entire RTP buffer
const uint8_t *Buffer() const { return buffer_; }
size_t Size() const { return size_; }
size_t size() const { return size_; }
// NAL
NAL_UNIT_TYPE NalUnitType() {
// ParseRtpData();
return nal_unit_type_;
}
bool FuAStart() {
// ParseRtpData();
return fu_header_.start;
}
bool FuAEnd() {
// ParseRtpData();
return fu_header_.end;
}
bool Av1FrameStart() {
// ParseRtpData();
int z, y, w, n;
GetAv1AggrHeader(z, y, w, n);
// return !z && !y;
if (z == 0 && y == 0 && w == 1) {
return true;
} else if (z == 0 && y == 1 && w == 1) {
return true;
} else {
return false;
}
}
bool Av1FrameEnd() {
// ParseRtpData();
int z, y, w, n;
GetAv1AggrHeader(z, y, w, n);
// return z && !y;
if (z == 0 && y == 0 && w == 1) {
return true;
} else if (z == 1 && y == 0 && w == 1) {
return true;
} else {
return false;
}
}
private:
void TryToDecodeRtpPacket();
void ParseRtpData();
private:
// Header
uint8_t version_ = 0;
bool has_padding_ = false;
bool has_extension_ = false;
uint8_t csrc_count_ = 0;
bool marker_ = false;
uint8_t payload_type_ = 0;
uint16_t sequence_number_ = 1;
uint64_t timestamp_ = 0;
uint32_t ssrc_ = 0;
std::vector<uint32_t> csrcs_;
uint16_t profile_ = 0;
uint16_t extension_profile_ = 0;
uint16_t extension_len_ = 0;
uint8_t *extension_data_ = nullptr;
FU_INDICATOR fu_indicator_;
FU_HEADER fu_header_;
uint8_t fec_symbol_id_ = 0;
uint8_t fec_source_symbol_num_ = 0;
uint8_t av1_aggr_header_ = 0;
// Payload
uint8_t *payload_ = nullptr;
size_t payload_size_ = 0;
size_t padding_size_ = 0;
// Entire RTP buffer
uint8_t *buffer_ = nullptr;
size_t size_ = 0;
// NAL
NAL_UNIT_TYPE nal_unit_type_ = NAL_UNIT_TYPE::UNKNOWN;
bool parsed_ = false;
};
#endif

21
src/rtp/rtp_packet/rtp_packet_received.cpp
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@@ -33,18 +33,21 @@ RtpPacketReceived& RtpPacketReceived::operator=(RtpPacketReceived&& packet) =
RtpPacketReceived::~RtpPacketReceived() {}
void RtpPacketReceived::GetHeader(RTPHeader* header) const {
header->markerBit = Marker();
header->payloadType = PayloadType();
header->sequenceNumber = SequenceNumber();
header->timestamp = Timestamp();
header->ssrc = Ssrc();
header->version = Version();
header->has_padding_ = HasPadding();
header->has_extension_ = HasExtension();
header->csrc_count_ = Csrcs().size();
header->marker_ = Marker();
header->payload_type_ = PayloadType();
header->sequence_number_ = SequenceNumber();
header->timestamp_ = Timestamp();
header->ssrc_ = Ssrc();
std::vector<uint32_t> csrcs = Csrcs();
header->numCSRCs = rtc::dchecked_cast<uint8_t>(csrcs.size());
for (size_t i = 0; i < csrcs.size(); ++i) {
header->arrOfCSRCs[i] = csrcs[i];
header->csrc_[i] = csrcs[i];
}
header->paddingLength = padding_size();
header->headerLength = headers_size();
header->padding_len = padding_size();
header->header_len = headers_size();
}
} // namespace webrtc

11
src/rtp/rtp_packetizer/rtp_packetizer.cpp Normal file
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@@ -0,0 +1,11 @@
#include "rtp_packetizer.h"
std::unique_ptr<RtpPacketizer> Create(uint32_t payload_type, uint8_t* payload,
size_t payload_size) {
switch (payload_type) {
case RtpPacket::PAYLOAD_TYPE::H264:
return std::make_unique<RtpPacketizerH264>(payload, payload_size);
case RtpPacket::PAYLOAD_TYPE::AV1:
return std::make_unique<RtpPacketizerAv1>(payload, payload_size);
}
}

25
src/rtp/rtp_packetizer/rtp_packetizer.h Normal file
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@@ -0,0 +1,25 @@
/*
* @Author: DI JUNKUN
* @Date: 2025-01-22
* Copyright (c) 2025 by DI JUNKUN, All Rights Reserved.
*/
#ifndef _RTP_PACKETIZER_H_
#define _RTP_PACKETIZER_H_
#include <cstddef>
#include <cstdint>
#include <memory>
#include "rtp_packet.h"
class RtpPacketizer {
public:
static std::unique_ptr<RtpPacketizer> Create(uint32_t payload_type);
virtual ~RtpPacketizer() = default;
bool Build(uint8_t* payload, uint32_t payload_size) = 0;
};
#endif

0
src/rtp/rtp_packetizer/rtp_packetizer_av1.cpp Normal file
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0
src/rtp/rtp_packetizer/rtp_packetizer_av1.h Normal file
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0
src/rtp/rtp_packetizer/rtp_packetizer_generic.cpp Normal file
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0
src/rtp/rtp_packetizer/rtp_packetizer_generic.h Normal file
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266
src/rtp/rtp_packetizer/rtp_packetizer_h264.cpp Normal file
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@@ -0,0 +1,266 @@
#include "rtp_packetizer_h264.h"
RtpPacketizerH264::RtpPacketizerH264()
: version_(kRtpVersion),
has_padding_(false),
has_extension_(true),
csrc_count_(0),
marker_(false),
payload_type_(RtpPacket::PAYLOAD_TYPE::H264),
sequence_number_(1),
timestamp_(0),
ssrc_(0),
profile_(0),
extension_profile_(0),
extension_len_(0),
extension_data_(nullptr) {}
RtpPacketizerH264::~RtpPacketizerH264() {}
std::vector<RtpPacket> RtpPacketizerH264::Build(uint8_t* payload,
uint32_t payload_size) {
uint32_t last_packet_size = payload_size % MAX_NALU_LEN;
uint32_t packet_num =
payload_size / MAX_NALU_LEN + (last_packet_size ? 1 : 0);
// TODO: use frame timestamp
timestamp_ = std::chrono::duration_cast<std::chrono::microseconds>(
std::chrono::system_clock::now().time_since_epoch())
.count();
for (uint32_t index = 0; index < packet_num; index++) {
version_ = kRtpVersion;
has_padding_ = false;
has_extension_ = true;
csrc_count_ = 0;
marker_ = index == packet_num - 1 ? 1 : 0;
payload_type_ = RtpPacket::PAYLOAD_TYPE(payload_type_);
sequence_number_++;
timestamp_ = timestamp_;
ssrc_ = ssrc_;
if (!csrc_count_) {
csrcs_ = csrcs_;
}
RtpPacket::FU_INDICATOR fu_indicator;
fu_indicator.forbidden_bit = 0;
fu_indicator.nal_reference_idc = 0;
fu_indicator.nal_unit_type = FU_A;
RtpPacket::FU_HEADER fu_header;
fu_header.start = index == 0 ? 1 : 0;
fu_header.end = index == packet_num - 1 ? 1 : 0;
fu_header.remain_bit = 0;
fu_header.nal_unit_type = FU_A;
rtp_packet_frame_.clear();
rtp_packet_frame_.push_back((version_ << 6) | (has_padding_ << 5) |
(has_extension_ << 4) | csrc_count_);
rtp_packet_frame_.push_back((marker_ << 7) | payload_type_);
rtp_packet_frame_.push_back((sequence_number_ >> 8) & 0xFF);
rtp_packet_frame_.push_back(sequence_number_ & 0xFF);
rtp_packet_frame_.push_back((timestamp_ >> 24) & 0xFF);
rtp_packet_frame_.push_back((timestamp_ >> 16) & 0xFF);
rtp_packet_frame_.push_back((timestamp_ >> 8) & 0xFF);
rtp_packet_frame_.push_back(timestamp_ & 0xFF);
rtp_packet_frame_.push_back((ssrc_ >> 24) & 0xFF);
rtp_packet_frame_.push_back((ssrc_ >> 16) & 0xFF);
rtp_packet_frame_.push_back((ssrc_ >> 8) & 0xFF);
rtp_packet_frame_.push_back(ssrc_ & 0xFF);
for (uint32_t index = 0; index < csrc_count_ && !csrcs_.empty(); index++) {
rtp_packet_frame_.push_back((csrcs_[index] >> 24) & 0xFF);
rtp_packet_frame_.push_back((csrcs_[index] >> 16) & 0xFF);
rtp_packet_frame_.push_back((csrcs_[index] >> 8) & 0xFF);
rtp_packet_frame_.push_back(csrcs_[index] & 0xFF);
}
if (has_extension_) {
extension_profile_ = kOneByteExtensionProfileId;
extension_len_ = 5;
uint32_t abs_send_time =
std::chrono::duration_cast<std::chrono::microseconds>(
std::chrono::system_clock::now().time_since_epoch())
.count();
rtp_packet_frame_.push_back(extension_profile_ >> 8);
rtp_packet_frame_.push_back(extension_profile_ & 0xff);
rtp_packet_frame_.push_back((extension_len_ >> 8) & 0xFF);
rtp_packet_frame_.push_back(extension_len_ & 0xFF);
rtp_packet_frame_.push_back(0x00);
rtp_packet_frame_.push_back(0x02);
rtp_packet_frame_.push_back((abs_send_time >> 16) & 0xFF);
rtp_packet_frame_.push_back((abs_send_time >> 8) & 0xFF);
rtp_packet_frame_.push_back(abs_send_time & 0xFF);
}
rtp_packet_frame_.push_back(fu_indicator.forbidden_bit << 7 |
fu_indicator.nal_reference_idc << 6 |
fu_indicator.nal_unit_type);
rtp_packet_frame_.push_back(fu_header.start << 7 | fu_header.end << 6 |
fu_header.remain_bit << 1 |
fu_header.nal_unit_type);
if (index == packet_num - 1 && last_packet_size > 0) {
rtp_packet_frame_.insert(rtp_packet_frame_.end(), payload,
payload + last_packet_size);
} else {
rtp_packet_frame_.insert(rtp_packet_frame_.end(), payload,
payload + MAX_NALU_LEN);
}
RtpPacket rtp_packet;
rtp_packet.Build(rtp_packet_frame_.data(), rtp_packet_frame_.size());
packets.emplace_back(rtp_packet);
}
}
// bool BuildFec(uint8_t* payload, uint32_t payload_size) {
// uint8_t** fec_packets =
// fec_encoder_.Encode((const char*)payload, payload_size);
// if (nullptr == fec_packets) {
// LOG_ERROR("Invalid fec_packets");
// return;
// }
// uint8_t num_of_total_packets = 0;
// uint8_t num_of_source_packets = 0;
// unsigned int last_packet_size = 0;
// fec_encoder_.GetFecPacketsParams(payload_size, num_of_total_packets,
// num_of_source_packets, last_packet_size);
// timestamp_ = std::chrono::duration_cast<std::chrono::microseconds>(
// std::chrono::system_clock::now().time_since_epoch())
// .count();
// for (uint8_t index = 0; index < num_of_total_packets; index++) {
// RtpPacket rtp_packet;
// if (index < num_of_source_packets) {
// rtp_packet.SetVerion(kRtpVersion);
// rtp_packet.SetHasPadding(false);
// rtp_packet.SetHasExtension(has_extension_);
// rtp_packet.SetMarker(index == num_of_source_packets - 1 ? 1 : 0);
// rtp_packet.SetPayloadType(RtpPacket::PAYLOAD_TYPE::H264_FEC_SOURCE);
// rtp_packet.SetSequenceNumber(sequence_number_++);
// rtp_packet.SetTimestamp(timestamp_);
// rtp_packet.SetSsrc(ssrc_);
// if (!csrcs_.empty()) {
// rtp_packet.SetCsrcs(csrcs_);
// }
// if (has_extension_) {
// rtp_packet.SetExtensionProfile(extension_profile_);
// rtp_packet.SetExtensionData(extension_data_, extension_len_);
// }
// RtpPacket::FU_INDICATOR fu_indicator;
// fu_indicator.forbidden_bit = 0;
// fu_indicator.nal_reference_idc = 0;
// fu_indicator.nal_unit_type = FU_A;
// RtpPacket::FU_HEADER fu_header;
// fu_header.start = index == 0 ? 1 : 0;
// fu_header.end = index == num_of_source_packets - 1 ? 1 : 0;
// fu_header.remain_bit = 0;
// fu_header.nal_unit_type = FU_A;
// rtp_packet.SetFuIndicator(fu_indicator);
// rtp_packet.SetFuHeader(fu_header);
// if (index == num_of_source_packets - 1) {
// if (last_packet_size > 0) {
// rtp_packet.EncodeH264FecSource(fec_packets[index],
// last_packet_size,
// index, num_of_source_packets);
// } else {
// rtp_packet.EncodeH264FecSource(fec_packets[index], MAX_NALU_LEN,
// index, num_of_source_packets);
// }
// } else {
// rtp_packet.EncodeH264FecSource(fec_packets[index], MAX_NALU_LEN,
// index,
// num_of_source_packets);
// }
// } else if (index >= num_of_source_packets && index <
// num_of_total_packets) {
// rtp_packet.SetVerion(kRtpVersion);
// rtp_packet.SetHasPadding(false);
// rtp_packet.SetHasExtension(has_extension_);
// rtp_packet.SetMarker(index == num_of_total_packets - 1 ? 1 : 0);
// rtp_packet.SetPayloadType(RtpPacket::PAYLOAD_TYPE::H264_FEC_REPAIR);
// rtp_packet.SetSequenceNumber(sequence_number_++);
// rtp_packet.SetTimestamp(timestamp_);
// rtp_packet.SetSsrc(ssrc_);
// if (!csrcs_.empty()) {
// rtp_packet.SetCsrcs(csrcs_);
// }
// if (has_extension_) {
// rtp_packet.SetExtensionProfile(extension_profile_);
// rtp_packet.SetExtensionData(extension_data_, extension_len_);
// }
// rtp_packet.EncodeH264FecRepair(fec_packets[index], MAX_NALU_LEN, index,
// num_of_source_packets);
// }
// packets.emplace_back(rtp_packet);
// // if (index < num_of_source_packets) {
// // rtp_packet.EncodeH264Fua(fec_packets[index], MAX_NALU_LEN);
// // packets.emplace_back(rtp_packet);
// // }
// }
// fec_encoder_.ReleaseFecPackets(fec_packets, payload_size);
// return;
// }
// if (payload_size <= MAX_NALU_LEN) {
// RtpPacket rtp_packet;
// rtp_packet.SetVerion(kRtpVersion);
// rtp_packet.SetHasPadding(false);
// has_extension_ = true;
// uint32_t abs_send_time =
// std::chrono::duration_cast<std::chrono::microseconds>(
// std::chrono::system_clock::now().time_since_epoch())
// .count();
// rtp_packet.SetAbsoluteSendTimestamp(abs_send_time);
// rtp_packet.SetHasExtension(has_extension_);
// rtp_packet.SetMarker(1);
// rtp_packet.SetPayloadType(RtpPacket::PAYLOAD_TYPE(payload_type_));
// rtp_packet.SetSequenceNumber(sequence_number_++);
// timestamp_ = std::chrono::duration_cast<std::chrono::microseconds>(
// std::chrono::system_clock::now().time_since_epoch())
// .count();
// rtp_packet.SetTimestamp(timestamp_);
// rtp_packet.SetSsrc(ssrc_);
// if (!csrcs_.empty()) {
// rtp_packet.SetCsrcs(csrcs_);
// }
// if (has_extension_) {
// rtp_packet.SetExtensionProfile(extension_profile_);
// rtp_packet.SetExtensionData(extension_data_, extension_len_);
// }
// RtpPacket::FU_INDICATOR fu_indicator;
// fu_indicator.forbidden_bit = 0;
// fu_indicator.nal_reference_idc = 1;
// fu_indicator.nal_unit_type = NALU;
// rtp_packet.SetFuIndicator(fu_indicator);
// rtp_packet.EncodeH264Nalu(payload, payload_size);
// packets.emplace_back(rtp_packet);
// return true;
// }

45
src/rtp/rtp_packetizer/rtp_packetizer_h264.h Normal file
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@@ -0,0 +1,45 @@
/*
* @Author: DI JUNKUN
* @Date: 2025-01-22
* Copyright (c) 2025 by DI JUNKUN, All Rights Reserved.
*/
#ifndef _RTP_PACKETIZER_H264_H_
#define _RTP_PACKETIZER_H264_H_
#include "rtp_packetizer.h"
class RtpPacketizerH264 : public RtpPacketizer {
public:
RtpPacketizerH264();
virtual ~RtpPacketizerH264();
std::vector<RtpPacket> Build(uint8_t* payload,
uint32_t payload_size) override;
private:
bool RtpPacketizerH264::EncodeH264Fua(RtpPacket& rtp_packet, uint8_t* payload,
size_t payload_size);
private:
uint8_t version_;
bool has_padding_;
bool has_extension_;
uint32_t csrc_count_;
bool marker_;
uint32_t payload_type_;
uint16_t sequence_number_;
uint64_t timestamp_;
uint32_t ssrc_;
std::vector<uint32_t> csrcs_;
uint16_t profile_;
uint16_t extension_profile_;
uint16_t extension_len_;
uint8_t* extension_data_;
private:
std::vector<uint8_t> rtp_packet_frame_;
};
#endif