Line data    Source code

       1             : /*
       2             :  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
       3             :  *
       4             :  *  Use of this source code is governed by a BSD-style license
       5             :  *  that can be found in the LICENSE file in the root of the source
       6             :  *  tree. An additional intellectual property rights grant can be found
       7             :  *  in the file PATENTS.  All contributing project authors may
       8             :  *  be found in the AUTHORS file in the root of the source tree.
       9             :  */
      10             : 
      11             : #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RPSI_H_
      12             : #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RPSI_H_
      13             : 
      14             : #include "webrtc/base/basictypes.h"
      15             : #include "webrtc/base/constructormagic.h"
      16             : #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/psfb.h"
      17             : 
      18             : namespace webrtc {
      19             : namespace rtcp {
      20             : class CommonHeader;
      21             : 
      22             : // Reference picture selection indication (RPSI) (RFC 4585).
      23             : // Assumes native bit string stores PictureId (VP8, VP9).
      24             : class Rpsi : public Psfb {
      25             :  public:
      26             :   static constexpr uint8_t kFeedbackMessageType = 3;
      27             :   Rpsi();
      28           0 :   ~Rpsi() override {}
      29             : 
      30             :   // Parse assumes header is already parsed and validated.
      31             :   bool Parse(const CommonHeader& packet);
      32             : 
      33             :   void SetPayloadType(uint8_t payload);
      34             :   void SetPictureId(uint64_t picture_id);
      35             : 
      36             :   uint8_t payload_type() const { return payload_type_; }
      37           0 :   uint64_t picture_id() const { return picture_id_; }
      38             : 
      39             :  protected:
      40             :   bool Create(uint8_t* packet,
      41             :               size_t* index,
      42             :               size_t max_length,
      43             :               RtcpPacket::PacketReadyCallback* callback) const override;
      44             : 
      45             :  private:
      46           0 :   size_t BlockLength() const override { return block_length_; }
      47             :   static size_t CalculateBlockLength(uint8_t bitstring_size_bytes);
      48             : 
      49             :   uint8_t payload_type_;
      50             :   uint64_t picture_id_;
      51             :   size_t block_length_;
      52             : 
      53             :   RTC_DISALLOW_COPY_AND_ASSIGN(Rpsi);
      54             : };
      55             : }  // namespace rtcp
      56             : }  // namespace webrtc
      57             : #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RPSI_H_