mirror of https://bitbucket.org/ausocean/av.git
79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
/*
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NAME
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MpegTs.go - provides a data structure intended to encapsulate the properties
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of an MpegTs packet.
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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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MpegTs.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 packets
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import (
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_"os"
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_"fmt"
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"reflect"
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)
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func boolToByte(in bool) (out uint8) {
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if in {
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out = 1
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}
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return
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}
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func GetOctectType(p *RtpPacket) byte {
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return p.Payload[0] & 0x1F
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}
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func GetStartBit(p *RtpPacket) byte {
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return (p.Payload[1] & 0x80) >> 7
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}
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func getEndBit(p *RtpPacket) byte {
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return (p.Payload[1] & 0x40) >> 6
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}
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func ParseH264Buffer(buffer []byte, outputChan chan<- []byte) {
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startCode1 := []byte{0x00,0x00,0x01}
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startCode2 := []byte{0x00,0x00,0x00,0x01}
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for i := 0; i < len(buffer); i++ {
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var start bool
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i, start = func() (int,bool) {
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switch{
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case reflect.DeepEqual(buffer[i:i+3],startCode1):
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return i+3, true
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case reflect.DeepEqual(buffer[i:i+4],startCode2):
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return i+4, true
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}
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return i, false
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}()
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if nalType := buffer[i] & 0x1F; start && ( nalType == 1 || nalType == 5) {
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for ; i < len(buffer) && !(i+3 < len(buffer) && ( reflect.DeepEqual(buffer[i:i+3],startCode1) ||
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reflect.DeepEqual(buffer[i:i+4],startCode2))); i++ {}
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outputChan<-append(append(startCode1,[]byte{0x09,0xF0}...),buffer[:i]...)
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buffer = buffer[i:]
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i=0
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}
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}
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}
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