前言

RTMP（Real-Time Messaging Protocol）是由Adobe Systems开发的一种用于音视频以及数据在因特网上进行高效传输的协议，被广泛用于各种实时流媒体传输。

RtmpPacket

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class RtmpPacket {
  constructor(fmt = 0, cid = 0) {
    this.header = {
      fmt: fmt,
      cid: cid,
      timestamp: 0,
      length: 0,
      type: 0,
      stream_id: 0
    };
    this.clock = 0;
    this.payload = Buffer.alloc(0);
    this.capacity = 0;
    this.bytes = 0;
  }
}

Rtmp

RTMP

define

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// for HandShake
const RTMP_HANDSHAKE_SIZE = 1536;
const RTMP_HANDSHAKE_UNINIT = 0;
const RTMP_HANDSHAKE_0 = 1;
const RTMP_HANDSHAKE_1 = 2;
const RTMP_HANDSHAKE_2 = 3;

constuctor

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constructor() {
  this.handshakePayload = Buffer.alloc(RTMP_HANDSHAKE_SIZE);
  this.handshakeState = RTMP_HANDSHAKE_UNINIT;
  this.handshakeBytes = 0;

  this.parserBuffer = Buffer.alloc(MAX_CHUNK_HEADER);
  this.parserState = RTMP_PARSE_INIT;
  this.parserBytes = 0;
  this.parserBasicBytes = 0;
  this.parserPacket = new RtmpPacket();
  this.inPackets = new Map();

  this.inChunkSize = RTMP_CHUNK_SIZE;
  this.outChunkSize = RTMP_MAX_CHUNK_SIZE;

  this.streams = 0;
  this.flv = new Flv();
}

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