mirror of https://bitbucket.org/ausocean/av.git
99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
/*
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NAME
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RtpToTsConverter.go - provides utilities for the conversion of Rtp packets
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to equivalent MpegTs packets.
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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.milton@gmail.com>
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LICENSE
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RtpToTsConverter.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 parser
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import (
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//"bitbucket.org/ausocean/av/itut"
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"../itut"
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_"fmt"
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_"time"
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)
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type h264Parser struct {
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inputBuffer []byte
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isParsing bool
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parserOutputChanRef chan []byte
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userOutputChanRef chan []byte
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inputChan chan byte
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}
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func NewH264Parser() (p *h264Parser) {
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p = new(h264Parser)
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p.isParsing = true
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p.inputChan = make(chan byte, 100000)
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return
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}
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func (p* h264Parser)Stop(){
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p.isParsing = false
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}
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func (p *h264Parser)Start(){
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go p.parse()
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}
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func (p *h264Parser)GetInputChan() chan byte {
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return p.inputChan
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}
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func (p *h264Parser)GetOutputChan() chan []byte {
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return p.userOutputChanRef
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}
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func (p *h264Parser)SetOutputChan(aChan chan []byte){
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p.parserOutputChanRef = aChan
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p.userOutputChanRef = aChan
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}
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func (p *h264Parser)parse() {
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outputBuffer := make([]byte, 0, 10000)
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searchingForEnd := false
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for p.isParsing {
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aByte := <-p.inputChan
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outputBuffer = append(outputBuffer, aByte)
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for i:=1; aByte == 0x00 && i != 4; i++ {
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aByte = <-p.inputChan
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outputBuffer = append(outputBuffer, aByte)
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if ( aByte == 0x01 && i == 2 ) || ( aByte == 0x01 && i == 3 ) {
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if searchingForEnd {
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output := append(append(itut.StartCode1(),itut.AUD()...),outputBuffer[:len(outputBuffer)-(i+1)]...)
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//time.Sleep(40*time.Millisecond)
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p.parserOutputChanRef<-output
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outputBuffer = outputBuffer[len(outputBuffer)-1-i:]
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searchingForEnd = false
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}
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aByte = <-p.inputChan
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outputBuffer = append(outputBuffer, aByte)
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if nalType := aByte & 0x1F; nalType == 1 || nalType == 5 || nalType == 8{
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searchingForEnd = true
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}
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}
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}
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}
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}
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