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             : #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_COMMON_HEADER_H_
      11             : #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_COMMON_HEADER_H_
      12             : 
      13             : #include "webrtc/base/basictypes.h"
      14             : 
      15             : namespace webrtc {
      16             : namespace rtcp {
      17             : class CommonHeader {
      18             :  public:
      19           0 :   CommonHeader() {}
      20             :   CommonHeader(const CommonHeader&) = default;
      21             :   CommonHeader& operator =(const CommonHeader&) = default;
      22             : 
      23             :   bool Parse(const uint8_t* buffer, size_t size_bytes);
      24             : 
      25           0 :   uint8_t type() const { return packet_type_; }
      26             :   // Depending on packet type same header field can be used either as count or
      27             :   // as feedback message type (fmt). Caller expected to know how it is used.
      28           0 :   uint8_t fmt() const { return count_or_format_; }
      29           0 :   uint8_t count() const { return count_or_format_; }
      30           0 :   size_t payload_size_bytes() const { return payload_size_; }
      31           0 :   const uint8_t* payload() const { return payload_; }
      32             :   // Returns pointer to the next RTCP packet in compound packet.
      33           0 :   const uint8_t* NextPacket() const {
      34           0 :     return payload_ + payload_size_ + padding_size_;
      35             :   }
      36             : 
      37             :  private:
      38             :   uint8_t packet_type_ = 0;
      39             :   uint8_t count_or_format_ = 0;
      40             :   uint8_t padding_size_ = 0;
      41             :   uint32_t payload_size_ = 0;
      42             :   const uint8_t* payload_ = nullptr;
      43             : };
      44             : }  // namespace rtcp
      45             : }  // namespace webrtc
      46             : #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_COMMON_HEADER_H_