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- /*
- * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
- *
- * Use of this source code is governed by a BSD-style license
- * that can be found in the LICENSE file in the root of the source
- * tree. An additional intellectual property rights grant can be found
- * in the file PATENTS. All contributing project authors may
- * be found in the AUTHORS file in the root of the source tree.
- */
- #ifndef API_RTP_PACKET_INFOS_H_
- #define API_RTP_PACKET_INFOS_H_
- #include <cstdint>
- #include <utility>
- #include <vector>
- #include "api/ref_counted_base.h"
- #include "api/rtp_packet_info.h"
- #include "api/scoped_refptr.h"
- #include "rtc_base/system/rtc_export.h"
- namespace webrtc {
- // Semi-immutable structure to hold information about packets used to assemble
- // an audio or video frame. Uses internal reference counting to make it very
- // cheap to copy.
- //
- // We should ideally just use |std::vector<RtpPacketInfo>| and have it
- // |std::move()|-ed as the per-packet information is transferred from one object
- // to another. But moving the info, instead of copying it, is not easily done
- // for the current video code.
- class RTC_EXPORT RtpPacketInfos {
- public:
- using vector_type = std::vector<RtpPacketInfo>;
- using value_type = vector_type::value_type;
- using size_type = vector_type::size_type;
- using difference_type = vector_type::difference_type;
- using const_reference = vector_type::const_reference;
- using const_pointer = vector_type::const_pointer;
- using const_iterator = vector_type::const_iterator;
- using const_reverse_iterator = vector_type::const_reverse_iterator;
- using reference = const_reference;
- using pointer = const_pointer;
- using iterator = const_iterator;
- using reverse_iterator = const_reverse_iterator;
- RtpPacketInfos() {}
- explicit RtpPacketInfos(const vector_type& entries)
- : data_(Data::Create(entries)) {}
- explicit RtpPacketInfos(vector_type&& entries)
- : data_(Data::Create(std::move(entries))) {}
- RtpPacketInfos(const RtpPacketInfos& other) = default;
- RtpPacketInfos(RtpPacketInfos&& other) = default;
- RtpPacketInfos& operator=(const RtpPacketInfos& other) = default;
- RtpPacketInfos& operator=(RtpPacketInfos&& other) = default;
- const_reference operator[](size_type pos) const { return entries()[pos]; }
- const_reference at(size_type pos) const { return entries().at(pos); }
- const_reference front() const { return entries().front(); }
- const_reference back() const { return entries().back(); }
- const_iterator begin() const { return entries().begin(); }
- const_iterator end() const { return entries().end(); }
- const_reverse_iterator rbegin() const { return entries().rbegin(); }
- const_reverse_iterator rend() const { return entries().rend(); }
- const_iterator cbegin() const { return entries().cbegin(); }
- const_iterator cend() const { return entries().cend(); }
- const_reverse_iterator crbegin() const { return entries().crbegin(); }
- const_reverse_iterator crend() const { return entries().crend(); }
- bool empty() const { return entries().empty(); }
- size_type size() const { return entries().size(); }
- private:
- class Data : public rtc::RefCountedBase {
- public:
- static rtc::scoped_refptr<Data> Create(const vector_type& entries) {
- // Performance optimization for the empty case.
- if (entries.empty()) {
- return nullptr;
- }
- return new Data(entries);
- }
- static rtc::scoped_refptr<Data> Create(vector_type&& entries) {
- // Performance optimization for the empty case.
- if (entries.empty()) {
- return nullptr;
- }
- return new Data(std::move(entries));
- }
- const vector_type& entries() const { return entries_; }
- private:
- explicit Data(const vector_type& entries) : entries_(entries) {}
- explicit Data(vector_type&& entries) : entries_(std::move(entries)) {}
- ~Data() override {}
- const vector_type entries_;
- };
- static const vector_type& empty_entries() {
- static const vector_type& value = *new vector_type();
- return value;
- }
- const vector_type& entries() const {
- if (data_ != nullptr) {
- return data_->entries();
- } else {
- return empty_entries();
- }
- }
- rtc::scoped_refptr<Data> data_;
- };
- } // namespace webrtc
- #endif // API_RTP_PACKET_INFOS_H_
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