av/rtmp/rtmp_headers.go

/*
NAME
  rtmp_headers.go

DESCRIPTION
  See Readme.md

AUTHORS
  Saxon Nelson-Milton <saxon@ausocean.org>
  Dan Kortschak <dan@ausocean.org>
  Alan Noble <alan@ausocean.org>

LICENSE
  rtmp_headers.go is Copyright (C) 2017-2019 the Australian Ocean Lab (AusOcean)

  It is free software: you can redistribute it and/or modify them
  under the terms of the GNU General Public License as published by the
  Free Software Foundation, either version 3 of the License, or (at your
  option) any later version.

  It is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  for more details.

  You should have received a copy of the GNU General Public License
  along with revid in gpl.txt.  If not, see http://www.gnu.org/licenses.

	Derived from librtmp under the GNU Lesser General Public License 2.1
	Copyright (C) 2005-2008 Team XBMC http://www.xbmc.org
	Copyright (C) 2008-2009 Andrej Stepanchuk
	Copyright (C) 2009-2010 Howard Chu
*/
package rtmp

import "net"

const (
	RTMPT_OPEN = iota
	RTMPT_SEND
	RTMPT_IDLE
	RTMPT_CLOSE
)

const (
	RTMP_PACKET_TYPE_CHUNK_SIZE         = 0x01
	RTMP_PACKET_TYPE_BYTES_READ_REPORT  = 0x03
	RTMP_PACKET_TYPE_CONTROL            = 0x04
	RTMP_PACKET_TYPE_SERVER_BW          = 0x05
	RTMP_PACKET_TYPE_CLIENT_BW          = 0x06
	RTMP_PACKET_TYPE_AUDIO              = 0x08
	RTMP_PACKET_TYPE_VIDEO              = 0x09
	RTMP_PACKET_TYPE_FLEX_STREAM_SEND   = 0x0F
	RTMP_PACKET_TYPE_FLEX_SHARED_OBJECT = 0x10
	RTMP_PACKET_TYPE_FLEX_MESSAGE       = 0x11
	RTMP_PACKET_TYPE_INFO               = 0x12
	RTMP_PACKET_TYPE_INVOKE             = 0x14
	RTMP_PACKET_TYPE_FLASH_VIDEO        = 0x16
)

const (
	RTMP_PACKET_SIZE_LARGE   = 0
	RTMP_PACKET_SIZE_MEDIUM  = 1
	RTMP_PACKET_SIZE_SMALL   = 2
	RTMP_PACKET_SIZE_MINIMUM = 3
)
const (
	RTMP_READ_HEADER    = 0x01
	RTMP_READ_RESUME    = 0x02
	RTMP_READ_NO_IGNORE = 0x04
	RTMP_READ_GOTKF     = 0x08
	RTMP_READ_GOTFLVK   = 0x10
	RTMP_READ_SEEKING   = 0x20
	RTMP_READ_COMPLETE  = -3
	RTMP_READ_ERROR     = -2
	RTMP_READ_EOF       = -1
	RTMP_READ_IGNORE    = 0
)

const (
	RTMP_LF_AUTH = 0x0001 /* using auth param */
	RTMP_LF_LIVE = 0x0002 /* stream is live */
	RTMP_LF_SWFV = 0x0004 /* do SWF verification */
	RTMP_LF_PLST = 0x0008 /* send playlist before play */
	RTMP_LF_BUFX = 0x0010 /* toggle stream on BufferEmpty msg */
	RTMP_LF_FTCU = 0x0020 /* free tcUrl on close */
	RTMP_LF_FAPU = 0x0040 /* free app on close */
)

const (
	RTMP_FEATURE_HTTP  = 0x01
	RTMP_FEATURE_ENC   = 0x02
	RTMP_FEATURE_SSL   = 0x04
	RTMP_FEATURE_MFP   = 0x08 /* not yet supported */
	RTMP_FEATURE_WRITE = 0x10 /* publish, not play */
	RTMP_FEATURE_HTTP2 = 0x20 /* server-side rtmpt */
)

const (
	RTMP_PROTOCOL_RTMP   = 0
	RTMP_PROTOCOL_RTMPE  = RTMP_FEATURE_ENC
	RTMP_PROTOCOL_RTMPT  = RTMP_FEATURE_HTTP
	RTMP_PROTOCOL_RTMPS  = RTMP_FEATURE_SSL
	RTMP_PROTOCOL_RTMPTE = (RTMP_FEATURE_HTTP | RTMP_FEATURE_ENC)
	RTMP_PROTOCOL_RTMPTS = (RTMP_FEATURE_HTTP | RTMP_FEATURE_SSL)
	RTMP_PROTOCOL_RTMFP  = RTMP_FEATURE_MFP
)

const (
	RTMP_DEFAULT_CHUNKSIZE = 128
	RTMP_BUFFER_CACHE_SIZE = (16 * 1024)
	RTMP_SIG_SIZE          = 1536
	RTMP_LARGE_HEADER_SIZE = 12
	RTMP_MAX_HEADER_SIZE   = 18
)

type chunk struct {
	headerSize int32
	data       []byte
	header     [RTMP_MAX_HEADER_SIZE]byte
}

type packet struct {
	headerType      uint8
	packetType      uint8
	hasAbsTimestamp bool
	channel         int32
	timestamp       uint32
	info            int32
	bodySize        uint32
	bytesRead       uint32
	chunk           *chunk
	header          []byte
	body            []byte
}

type link struct {
	host     string
	playpath string
	tcUrl    string
	swfUrl   string
	pageUrl  string
	app      string
	auth     string
	flashVer string
	token    string
	extras   C_AMFObject
	seekTime int32
	lFlags   int32
	swfAge   int32
	protocol int32
	timeout  uint
	port     uint16
	conn     *net.TCPConn
}

type method struct {
	name string
	num  int32
}