mirror of https://bitbucket.org/ausocean/av.git
48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
/*
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DESCRIPTION
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jpeg.go contains constants, structure and functions specific to the JPEG.
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AUTHOR
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Saxon Nelson-Milton <saxon@ausocean.org>
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LICENSE
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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 mjpeg
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import "io"
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// JPEG marker codes.
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const (
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soi = 0xd8 // Start of image.
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dri = 0xdd // Define restart interval.
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dqt = 0xdb // Define quantization tables.
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dht = 0xde // Define hierarchical progression.
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sos = 0xda // Start of scan.
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app0 = 0xe0 // TODO: find out what this is.
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sof0 = 0xc0 // Baseline
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)
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// putMarker writes an JPEG marker with code to w.
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func putMarker(w io.Writer, code byte) error {
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_, err := w.Write([]byte{0xff, code})
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if err != nil {
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return err
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}
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return nil
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}
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