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

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 {
	c_headerSize int32
	c_chunkSize  int32
	c_chunk      *byte
	c_header     [RTMP_MAX_HEADER_SIZE]byte
}

// typedef struct RTMPPacket
// rtmp.h +113
type C_RTMPPacket struct {
	m_headerType      uint8
	m_packetType      uint8
	m_hasAbsTimestamp uint8
	m_nChannel        int32
	m_nTimeStamp      uint32
	m_nInfoField2     int32
	m_nBodySize       uint32
	m_nBytesRead      uint32
	m_chunk           *C_RTMPChunk
	m_body            *byte
}

// typedef struct RTMPSockBuf
// rtmp.h +127
type C_RTMPSockBuf struct {
	sb_socket   int32
	sb_size     int32
	sb_start    *byte
	sb_buf      [RTMP_BUFFER_CACHE_SIZE]byte // port const
	sb_timedout int32
	sb_ssl      uintptr
}

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

// typedef struct RTMP_LNK
// rtmp.h +144
type C_RTMP_LNK struct {
	hostname      string
	sockshost     string
	playpath0     string
	playpath      string
	tcUrl         string
	swfUrl        string
	pageUrl       string
	app           string
	auth          string
	flashVer      string
	subscribepath string
	usherToken    string
	token         string
	pubUser       string
	pubPasswd     string
	extras        C_AMFObject
	edepth        int32
	seekTime      int32
	stopTime      int32
	lFlags        int32
	swfAge        int32
	protocol      int32
	timeout       int32
	pFlags        int32
	socksport     uint16
	port          uint16
}

// typedef struct RTMP_READ
// rtmp.h +200
type C_RTMP_READ struct {
	buf                     *byte
	bufpos                  *byte
	buflen                  uint
	timestamp               uint32
	dataType                uint8
	flags                   uint8
	status                  int8
	initialFrameType        uint8
	nResumeTS               uint32
	metaHeader              *byte
	initialFrame            *byte
	nMetaHeaderSize         uint32
	nInitialFrameSize       uint32
	nIgnoredFrameCounter    uint32
	nIgnoredFlvFrameCounter uint32
}

// 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 {
	m_inChunkSize          int32
	m_outChunkSize         int32
	m_nBWCheckCounter      int32
	m_nBytesIn             int32
	m_nBytesInSent         int32
	m_nBufferMS            int32
	m_stream_id            int32
	m_mediaChannel         int32
	m_mediaStamp           uint32
	m_pauseStamp           uint32
	m_pausing              int32
	m_nServerBW            int32
	m_nClientBW            int32
	m_nClientBW2           uint8
	m_bPlaying             bool
	m_bSendEncoding        uint8
	m_bSendCounter         uint8
	m_numInvokes           int32
	m_numCalls             int32
	m_methodCalls          *C_RTMP_METHOD
	m_channelsAllocatedIn  int32
	m_channelsAllocatedOut int32
	m_vecChannelsIn        **C_RTMPPacket
	m_vecChannelsOut       **C_RTMPPacket
	m_channelTimestamp     *int32
	m_fAudioCodecs         float64
	m_fVideoCodecs         float64
	m_fEncoding            float64
	m_fDuration            float64
	m_msgCounter           int32
	m_polling              int32
	m_resplen              int32
	m_unackd               int32
	m_clientID             string
	m_read                 C_RTMP_READ
	m_write                C_RTMPPacket
	m_sb                   C_RTMPSockBuf
	Link                   C_RTMP_LNK
}