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/*
* Copyright (c) 2011 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 MODULES_VIDEO_CODING_SESSION_INFO_H_
#define MODULES_VIDEO_CODING_SESSION_INFO_H_
#include <stddef.h>
#include <stdint.h>
#include <list>
#include <vector>
#include "modules/video_coding/codecs/h264/include/h264_globals.h"
#include "modules/video_coding/codecs/vp9/include/vp9_globals.h"
#include "modules/video_coding/include/video_coding.h"
#include "modules/video_coding/packet.h"
namespace webrtc {
// Used to pass data from jitter buffer to session info.
// This data is then used in determining whether a frame is decodable.
struct FrameData {
int64_t rtt_ms;
float rolling_average_packets_per_frame;
};
class VCMSessionInfo {
public:
VCMSessionInfo();
~VCMSessionInfo();
void UpdateDataPointers(const uint8_t* old_base_ptr,
const uint8_t* new_base_ptr);
void Reset();
int InsertPacket(const VCMPacket& packet,
uint8_t* frame_buffer,
const FrameData& frame_data);
bool complete() const;
// Makes the frame decodable. I.e., only contain decodable NALUs. All
// non-decodable NALUs will be deleted and packets will be moved to in
// memory to remove any empty space.
// Returns the number of bytes deleted from the session.
size_t MakeDecodable();
size_t SessionLength() const;
int NumPackets() const;
bool HaveFirstPacket() const;
bool HaveLastPacket() const;
webrtc::VideoFrameType FrameType() const { return frame_type_; }
int LowSequenceNumber() const;
// Returns highest sequence number, media or empty.
int HighSequenceNumber() const;
int PictureId() const;
int TemporalId() const;
bool LayerSync() const;
int Tl0PicId() const;
std::vector<NaluInfo> GetNaluInfos() const;
void SetGofInfo(const GofInfoVP9& gof_info, size_t idx);
private:
enum { kMaxVP8Partitions = 9 };
typedef std::list<VCMPacket> PacketList;
typedef PacketList::iterator PacketIterator;
typedef PacketList::const_iterator PacketIteratorConst;
typedef PacketList::reverse_iterator ReversePacketIterator;
void InformOfEmptyPacket(uint16_t seq_num);
// Finds the packet of the beginning of the next VP8 partition. If
// none is found the returned iterator points to `packets_.end()`.
// `it` is expected to point to the last packet of the previous partition,
// or to the first packet of the frame. `packets_skipped` is incremented
// for each packet found which doesn't have the beginning bit set.
PacketIterator FindNextPartitionBeginning(PacketIterator it) const;
// Returns an iterator pointing to the last packet of the partition pointed to
// by `it`.
PacketIterator FindPartitionEnd(PacketIterator it) const;
static bool InSequence(const PacketIterator& it,
const PacketIterator& prev_it);
size_t InsertBuffer(uint8_t* frame_buffer, PacketIterator packetIterator);
size_t Insert(const uint8_t* buffer,
size_t length,
bool insert_start_code,
uint8_t* frame_buffer);
void ShiftSubsequentPackets(PacketIterator it, int steps_to_shift);
PacketIterator FindNaluEnd(PacketIterator packet_iter) const;
// Deletes the data of all packets between `start` and `end`, inclusively.
// Note that this function doesn't delete the actual packets.
size_t DeletePacketData(PacketIterator start, PacketIterator end);
void UpdateCompleteSession();
bool complete_;
webrtc::VideoFrameType frame_type_;
// Packets in this frame.
PacketList packets_;
int empty_seq_num_low_;
int empty_seq_num_high_;
// The following two variables correspond to the first and last media packets
// in a session defined by the first packet flag and the marker bit.
// They are not necessarily equal to the front and back packets, as packets
// may enter out of order.
// TODO(mikhal): Refactor the list to use a map.
int first_packet_seq_num_;
int last_packet_seq_num_;
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_SESSION_INFO_H_
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