av/rtmp/rtmp_headers.go

/*
NAME
  rtmp_headers.go

DESCRIPTION
  See Readme.md

AUTHORS
  Saxon Nelson-Milton <saxon@ausocean.org>

LICENSE
  rtmp_headers.go is Copyright (C) 2017 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
)

// typedef struct RTMPChunk
// rtmp.h +105
type C_RTMPChunk struct {
	headerSize int32
	data      []byte
	header     [RTMP_MAX_HEADER_SIZE]byte
}

// typedef struct RTMPPacket
// rtmp.h +113
type C_RTMPPacket struct {
	headerType      uint8
	packetType      uint8
	hasAbsTimestamp bool
	nChannel        int32
	nTimeStamp      uint32
	nInfoField2     int32
	nBodySize       uint32
	nBytesRead      uint32
	chunk           *C_RTMPChunk
	header          []byte
	body            []byte
}

// typedef struct RTMPSockBuf
// rtmp.h +127
// DELETED: subsumed by C_RTMP_LNK

// RTMPPacket_IsReady(a)
// rtmp.h +142
func C_RTMPPacket_IsReady(p *C_RTMPPacket) bool {
	return p.nBytesRead == p.nBodySize
}

// typedef struct RTMP_LNK
// rtmp.h +144
type C_RTMP_LNK struct {
	host      string
	playpath0 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
}

// typedef struct RTMPMethod
// rtmp.h +231
type C_RTMP_METHOD struct {
	name string
	num  int32
}

// typedef struct RTMP
// rtmp.h +237
type C_RTMP struct {
	inChunkSize          int32
	outChunkSize         int32
	nBWCheckCounter      int32
	nBytesIn             int32
	nBytesInSent         int32
	nBufferMS            int32
	streamID             int32
	mediaChannel         int32
	pausing              int32
	nServerBW            int32
	nClientBW            int32
	nClientBW2           uint8
	bPlaying             bool
	bSendEncoding        bool
	numInvokes           int32
	methodCalls          []C_RTMP_METHOD
	channelsAllocatedIn  int32
	channelsAllocatedOut int32
	vecChannelsIn        []*C_RTMPPacket
	vecChannelsOut       []*C_RTMPPacket
	channelTimestamp     []int32
	fAudioCodecs         float64
	fVideoCodecs         float64
	fEncoding            float64
	fDuration            float64
	msgCounter           int32
	resplen              int32
	unackd               int32
	write                C_RTMPPacket
	defered              []byte
	Link                  C_RTMP_LNK
}