mirror of https://bitbucket.org/ausocean/av.git
63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
// +build !circleci
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/*
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DESCRIPTION
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A filter that detects motion and discards frames without motion. The
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filter uses a Mixture of Gaussians method (MoG) to determine what is
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background and what is foreground.
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AUTHORS
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Scott Barnard <scott@ausocean.org>
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LICENSE
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mog.go is Copyright (C) 2019 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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in gpl.txt. If not, see http://www.gnu.org/licenses.
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*/
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package filter
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import (
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"io"
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)
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// MOGFilter is a filter that provides basic motion detection. MoG is short for
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// Mixture of Gaussians method.
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type BasicFilter struct {
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dst io.WriteCloser
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}
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// NewMOGFilter returns a pointer to a new MOGFilter struct.
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func NewBasicFilter(dst io.WriteCloser) *BasicFilter {
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return &BasicFilter{dst}
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}
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// Implements io.Closer.
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// Close frees resources used by gocv, because it has to be done manually, due to
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// it using c-go.
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func (m *BasicFilter) Close() error {
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return nil
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}
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// Implements io.Writer.
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// Write applies the motion filter to the video stream. Only frames with motion
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// are written to the destination encoder, frames without are discarded.
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func (m *BasicFilter) Write(f []byte) (int, error) {
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//decode MJPEG
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//for all frames find difference in this frame from last frames
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return m.dst.Write(f)
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}
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