mirror of https://bitbucket.org/ausocean/av.git
115 lines
3.2 KiB
Go
115 lines
3.2 KiB
Go
/*
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NAME
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RTMP.go
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DESCRIPTION
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See Readme.md
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AUTHOR
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Saxon Nelson-Milton <saxon@ausocean.org>
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LICENSE
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RTMP.go is Copyright (C) 2017 the Australian Ocean Lab (AusOcean)
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It is free software: you can redistribute it and/or modify them
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with revid in gpl.txt. If not, see [GNU licenses](http://www.gnu.org/licenses).
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*/
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package rtmp
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// #cgo CFLAGS: -I/home/pi/go/src/bitbucket.org/AusOcean/av/rtmp/
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// #cgo CFLAGS: -I/home/pi/go/src/bitbucket.org/ausocean/av/rtmp/rtmp_c/librtmp
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// #cgo LDFLAGS: /home/pi/go/src/bitbucket.org/ausocean/av/rtmp/rtmp_c/librtmp/librtmp.a
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// #cgo LDFLAGS: -lssl -lcrypto -lz
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// #include <RTMPWrapper.h>
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import "C"
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import (
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"errors"
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_ "fmt"
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"sync"
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"unsafe"
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)
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// RTMPSession provides a crude interface for sending flv tags over rtmp
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type RTMPSession interface {
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StartSession() error
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WriteFrame(data []byte, dataLength uint) error
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EndSession() error
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}
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// rtmpSession provides parameters required for an rtmp communication session
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type rtmpSession struct {
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url string
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timeout uint
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running bool
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mutex *sync.Mutex
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}
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// NewRTMPSession returns a new instance of an rtmpSession struct
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func NewRTMPSession(url string, connectTimeout uint) (session *rtmpSession) {
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session = new(rtmpSession)
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session.url = url
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session.timeout = connectTimeout
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session.mutex = &sync.Mutex{}
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return
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}
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// StartSession establishes an rtmp connection with the url passed into the
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// constructor
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func (s *rtmpSession) StartSession() error {
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if !s.running {
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if !uintToBool(uint(C.RTMP_start_session(C.CString(s.url), C.uint(s.timeout)))) {
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return errors.New("RTMP start error! Check rtmp log for details!")
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}
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s.running = true
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} else {
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return errors.New("Tried to start rtmp session, but already started!")
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}
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return nil
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}
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// WriteFrame writes a frame (flv tag) to the rtmp connection
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// TODO: Remove mutex
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func (s *rtmpSession) WriteFrame(data []byte, dataLength uint) error {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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if s.running {
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dataCopy := make([]byte, len(data))
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copy(dataCopy, data)
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if !uintToBool(uint(C.RTMP_write_frame((*C.char)(unsafe.Pointer(&dataCopy[0])), C.uint(dataLength)))) {
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return errors.New("RTMP write error! Check rtmp log for details!")
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}
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} else {
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return errors.New("RTMP session not running, can't write!")
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}
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return nil
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}
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// EndSession terminates the rtmp connection
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func (s *rtmpSession) EndSession() error {
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if s.running {
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if !uintToBool(uint(C.RTMP_end_session())) {
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return errors.New("RTMP end session error! Check rtmp log for details!")
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}
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s.running = false
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} else {
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return errors.New("Tried to stop rtmp session, but not running!")
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}
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return nil
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}
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// uintToBool takes a uint and returns the bool equivalent
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func uintToBool(x uint) bool {
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return x != 0
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}
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