From 686e386f4112d00dbd118f0983b53390cdd94cdd Mon Sep 17 00:00:00 2001
From: Jan Stabenow <moin@jan-stabenow.de>
Date: Mon, 21 Nov 2022 10:52:04 +0100
Subject: [PATCH] Add Bob Weaver Deinterlacing Filter (datarhei/restreamer#465)

---
 CHANGELOG.md                    |   6 +-
 src/misc/filters/index.js       |   2 +
 src/misc/filters/video/Bwdif.js | 172 ++++++++++++++++++++++++++++++++
 3 files changed, 179 insertions(+), 1 deletion(-)
 create mode 100644 src/misc/filters/video/Bwdif.js

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f27d90..38163be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,12 @@
 # Restreamer-UI
 
+## v1.5.1 > v1.6.0
+
+-   Add Bob Weaver Deinterlacing Filter ([#465](https://github.com/datarhei/restreamer/issues/465))
+
 ## v1.5.0 > v1.5.1
 
--   Fix FFmpeg version check for RTSP sources (datarhei/restreamer#455)
+-   Fix FFmpeg version check for RTSP sources ([#455](https://github.com/datarhei/restreamer/issues/455))
 -   Fix requires Core >= v16.11.0 and FFmpeg >= 5.1.0
 
 ## v1.4.0 > v1.5.0
diff --git a/src/misc/filters/index.js b/src/misc/filters/index.js
index 382f0d0..f223d11 100644
--- a/src/misc/filters/index.js
+++ b/src/misc/filters/index.js
@@ -9,6 +9,7 @@ import * as Scale from './video/Scale';
 import * as Transpose from './video/Transpose';
 import * as HFlip from './video/HFlip';
 import * as VFlip from './video/VFlip';
+import * as Bwdif from './video/Bwdif';
 
 // Register filters type: audio/video
 class Registry {
@@ -56,6 +57,7 @@ videoRegistry.Register(Scale);
 videoRegistry.Register(Transpose);
 videoRegistry.Register(HFlip);
 videoRegistry.Register(VFlip);
+videoRegistry.Register(Bwdif);
 
 // Export registrys for ../SelectFilters.js
 export { audioRegistry as Audio, videoRegistry as Video };
diff --git a/src/misc/filters/video/Bwdif.js b/src/misc/filters/video/Bwdif.js
new file mode 100644
index 0000000..26ec93e
--- /dev/null
+++ b/src/misc/filters/video/Bwdif.js
@@ -0,0 +1,172 @@
+import React from 'react';
+
+import { Trans } from '@lingui/macro';
+import Grid from '@mui/material/Grid';
+import MenuItem from '@mui/material/MenuItem';
+
+import Checkbox from '../../Checkbox';
+import Select from '../../Select';
+
+// Deinterlace the input video ("bwdif" stands for "Bob Weaver Deinterlacing Filter").
+// http://ffmpeg.org/ffmpeg-all.html#bwdif
+
+function init(initialState) {
+	const state = {
+		enabled: false,
+		mode: '1',
+		parity: '-1',
+		deint: '0',
+		...initialState,
+	};
+
+	return state;
+}
+
+function createGraph(settings) {
+	settings = init(settings);
+
+	const mapping = [];
+
+	if (settings.enabled) {
+		mapping.push(`bwdif=mode=${settings.mode}:parity=${settings.parity}:deint=${settings.deint}`);
+	}
+
+	return mapping.join(',');
+}
+
+function Mode(props) {
+	return (
+		<Select label={<Trans>Deinterlace mode</Trans>} value={props.value} onChange={props.onChange}>
+			<MenuItem value="0">
+				<Trans>Each frames</Trans>
+			</MenuItem>
+			<MenuItem value="1">
+				<Trans>Each field</Trans>
+			</MenuItem>
+		</Select>
+	);
+}
+
+Mode.defaultProps = {
+	value: '',
+	onChange: function (event) {},
+};
+
+function Parity(props) {
+	return (
+		<Select label={<Trans>Deinterlace parity</Trans>} value={props.value} onChange={props.onChange}>
+			<MenuItem value="0">
+				<Trans>Top field</Trans>
+			</MenuItem>
+			<MenuItem value="1">
+				<Trans>Bottom field</Trans>
+			</MenuItem>
+			<MenuItem value="-1">
+				<Trans>Auto</Trans>
+			</MenuItem>
+		</Select>
+	);
+}
+
+Parity.defaultProps = {
+	value: '',
+	onChange: function (event) {},
+};
+
+function Deint(props) {
+	return (
+		<Select label={<Trans>Deinterlace deint</Trans>} value={props.value} onChange={props.onChange}>
+			<MenuItem value="0">
+				<Trans>All frames</Trans>
+			</MenuItem>
+			<MenuItem value="1">
+				<Trans>Marked frames</Trans>
+			</MenuItem>
+		</Select>
+	);
+}
+
+Deint.defaultProps = {
+	value: '',
+	onChange: function (event) {},
+};
+
+function Filter(props) {
+	const settings = init(props.settings);
+
+	const handleChange = (newSettings) => {
+		let automatic = false;
+		if (!newSettings) {
+			newSettings = settings;
+			automatic = true;
+		}
+
+		props.onChange(newSettings, createGraph(newSettings), automatic);
+	};
+
+	const update = (what) => (event) => {
+		const newSettings = {
+			...settings,
+		};
+		if (['enabled'].includes(what)) {
+			newSettings[what] = !settings.enabled;
+		} else {
+			newSettings[what] = event.target.value;
+		}
+
+		handleChange(newSettings);
+	};
+
+	React.useEffect(() => {
+		handleChange(null);
+		// eslint-disable-next-line react-hooks/exhaustive-deps
+	}, []);
+
+	return (
+		<React.Fragment>
+			<Grid item>
+				<Checkbox label={<Trans>Deinterlace (bwdif)</Trans>} checked={settings.enabled} onChange={update('enabled')} />
+			</Grid>
+			{settings.enabled && (
+				<React.Fragment>
+					<Grid item xs={12}>
+						<Mode label={<Trans>Deinterlace mode</Trans>} value={settings.mode} onChange={update('mode')}></Mode>
+					</Grid>
+					<Grid item xs={6}>
+						<Parity label={<Trans>Deinterlace parity</Trans>} value={settings.parity} onChange={update('parity')}></Parity>
+					</Grid>
+					<Grid item xs={6}>
+						<Deint label={<Trans>Deinterlace deint</Trans>} value={settings.deint} onChange={update('deint')}></Deint>
+					</Grid>
+				</React.Fragment>
+			)}
+		</React.Fragment>
+	);
+}
+
+Filter.defaultProps = {
+	settings: {},
+	onChange: function (settings, mapping) {},
+};
+
+const filter = 'bwdif';
+const name = 'Deinterlacing Filter';
+const type = 'video';
+const hwaccel = false;
+
+function summarize(settings) {
+	if (settings.mode !== 'none') {
+		return `${name}`;
+	}
+}
+
+function defaults() {
+	const settings = init({});
+
+	return {
+		settings: settings,
+		graph: createGraph(settings),
+	};
+}
+
+export { name, filter, type, hwaccel, summarize, defaults, createGraph, Filter as component };