mirror of https://bitbucket.org/ausocean/av.git
74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
/*
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NAME
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flv.go
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DESCRIPTION
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See Readme.md
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AUTHORS
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Saxon A. Nelson-Milton <saxon@ausocean.org>
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LICENSE
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flv.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 http://www.gnu.org/licenses.
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*/
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package flv
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import "bitbucket.org/ausocean/av/tools"
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const (
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headerLength = 72
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version = 0x01
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maxVideoTagSize = 10000
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maxAudioTagSize = 10000
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)
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const (
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VideoTagType = 9
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AudioTagType = 8
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KeyFrameType = 1
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InterFrameType = 2
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H264 = 7
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AVCNALU = 1
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SequenceHeader = 0
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DataHeaderLength = 5
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NoTimestampExtension = 0
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AACAudioFormat = 10
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PCMAudioFormat = 0
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)
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var flvHeaderCode = []byte{0x46, 0x4C, 0x56}
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type Header struct {
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AudioFlag bool
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VideoFlag bool
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}
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func btb(b bool) byte {
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return tools.BoolToByte(b)
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}
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func (h *Header) ToByteSlice() (output []byte) {
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output = make([]byte, 0, headerLength)
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output = append(output, flvHeaderCode...)
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output = append(output, []byte{
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version,
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0x00 | btb(h.AudioFlag)<<2 | btb(h.VideoFlag),
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0x00, 0x00, 0x00, byte(9),
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}...)
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return
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}
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