blob: ef3c022111ed704d4751814dc948e66acc74e537 [file] [log] [blame]
* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include <deque>
#include <map>
#include <memory>
#include <set>
#include <utility>
#include "absl/container/inlined_vector.h"
#include "modules/video_coding/frame_object.h"
#include "modules/video_coding/rtp_frame_reference_finder.h"
#include "rtc_base/numerics/sequence_number_util.h"
namespace webrtc {
class RtpSeqNumOnlyRefFinder {
RtpSeqNumOnlyRefFinder() = default;
RtpFrameReferenceFinder::ReturnVector ManageFrame(
std::unique_ptr<RtpFrameObject> frame);
RtpFrameReferenceFinder::ReturnVector PaddingReceived(uint16_t seq_num);
void ClearTo(uint16_t seq_num);
static constexpr int kMaxStashedFrames = 100;
static constexpr int kMaxPaddingAge = 100;
enum FrameDecision { kStash, kHandOff, kDrop };
FrameDecision ManageFrameInternal(RtpFrameObject* frame);
void RetryStashedFrames(RtpFrameReferenceFinder::ReturnVector& res);
void UpdateLastPictureIdWithPadding(uint16_t seq_num);
// For every group of pictures, hold two sequence numbers. The first being
// the sequence number of the last packet of the last completed frame, and
// the second being the sequence number of the last packet of the last
// completed frame advanced by any potential continuous packets of padding.
std::pair<uint16_t, uint16_t>,
// Padding packets that have been received but that are not yet continuous
// with any group of pictures.
std::set<uint16_t, DescendingSeqNumComp<uint16_t>> stashed_padding_;
// Frames that have been fully received but didn't have all the information
// needed to determine their references.
std::deque<std::unique_ptr<RtpFrameObject>> stashed_frames_;
// Unwrapper used to unwrap generic RTP streams. In a generic stream we derive
// a picture id from the packet sequence number.
SeqNumUnwrapper<uint16_t> rtp_seq_num_unwrapper_;
} // namespace webrtc