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/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RPSI_H_
#define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RPSI_H_
#include "webrtc/base/basictypes.h"
#include "webrtc/base/constructormagic.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/psfb.h"
namespace webrtc {
namespace rtcp {
class CommonHeader;
// Reference picture selection indication (RPSI) (RFC 4585).
// Assumes native bit string stores PictureId (VP8, VP9).
class Rpsi : public Psfb {
public:
static constexpr uint8_t kFeedbackMessageType = 3;
Rpsi();
~Rpsi() override {}
// Parse assumes header is already parsed and validated.
bool Parse(const CommonHeader& packet);
void SetPayloadType(uint8_t payload);
void SetPictureId(uint64_t picture_id);
uint8_t payload_type() const { return payload_type_; }
uint64_t picture_id() const { return picture_id_; }
protected:
bool Create(uint8_t* packet,
size_t* index,
size_t max_length,
RtcpPacket::PacketReadyCallback* callback) const override;
private:
size_t BlockLength() const override { return block_length_; }
static size_t CalculateBlockLength(uint8_t bitstring_size_bytes);
uint8_t payload_type_;
uint64_t picture_id_;
size_t block_length_;
RTC_DISALLOW_COPY_AND_ASSIGN(Rpsi);
};
} // namespace rtcp
} // namespace webrtc
#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RPSI_H_