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aa8b6df4 C |
1 | // Thanks: https://github.com/feross/render-media |
2 | // TODO: use render-media once https://github.com/feross/render-media/issues/32 is fixed | |
3 | ||
aa8b6df4 | 4 | import * as MediaElementWrapper from 'mediasource' |
bf5685f0 | 5 | import { extname } from 'path' |
aa8b6df4 C |
6 | import * as videostream from 'videostream' |
7 | ||
8 | const VIDEOSTREAM_EXTS = [ | |
9 | '.m4a', | |
10 | '.m4v', | |
11 | '.mp4' | |
12 | ] | |
13 | ||
14 | type RenderMediaOptions = { | |
15 | controls: boolean | |
16 | autoplay: boolean | |
17 | } | |
18 | ||
19 | function renderVideo ( | |
20 | file, | |
21 | elem: HTMLVideoElement, | |
22 | opts: RenderMediaOptions, | |
23 | callback: (err: Error, renderer: any) => void | |
24 | ) { | |
25 | validateFile(file) | |
26 | ||
27 | return renderMedia(file, elem, opts, callback) | |
28 | } | |
29 | ||
bf5685f0 | 30 | function renderMedia (file, elem: HTMLVideoElement, opts: RenderMediaOptions, callback: (err: Error, renderer?: any) => void) { |
aa8b6df4 C |
31 | const extension = extname(file.name).toLowerCase() |
32 | let preparedElem = undefined | |
33 | let currentTime = 0 | |
34 | let renderer | |
35 | ||
0f56c6e5 C |
36 | try { |
37 | if (VIDEOSTREAM_EXTS.indexOf(extension) >= 0) { | |
38 | renderer = useVideostream() | |
39 | } else { | |
40 | renderer = useMediaSource() | |
41 | } | |
42 | } catch (err) { | |
43 | return callback(err) | |
aa8b6df4 C |
44 | } |
45 | ||
46 | function useVideostream () { | |
47 | prepareElem() | |
bf5685f0 C |
48 | preparedElem.addEventListener('error', function onError () { |
49 | preparedElem.removeEventListener('error', onError) | |
50 | ||
51 | return fallbackToMediaSource() | |
52 | }) | |
aa8b6df4 | 53 | preparedElem.addEventListener('loadstart', onLoadStart) |
aa8b6df4 C |
54 | return videostream(file, preparedElem) |
55 | } | |
56 | ||
bf5685f0 C |
57 | function useMediaSource (useVP9 = false) { |
58 | const codecs = getCodec(file.name, useVP9) | |
59 | ||
aa8b6df4 | 60 | prepareElem() |
bf5685f0 C |
61 | preparedElem.addEventListener('error', function onError(err) { |
62 | // Try with vp9 before returning an error | |
63 | if (codecs.indexOf('vp8') !== -1) { | |
64 | preparedElem.removeEventListener('error', onError) | |
65 | ||
66 | return fallbackToMediaSource(true) | |
67 | } | |
68 | ||
69 | return callback(err) | |
70 | }) | |
aa8b6df4 | 71 | preparedElem.addEventListener('loadstart', onLoadStart) |
aa8b6df4 C |
72 | |
73 | const wrapper = new MediaElementWrapper(preparedElem) | |
bf5685f0 | 74 | const writable = wrapper.createWriteStream(codecs) |
aa8b6df4 C |
75 | file.createReadStream().pipe(writable) |
76 | ||
77 | if (currentTime) preparedElem.currentTime = currentTime | |
78 | ||
79 | return wrapper | |
80 | } | |
81 | ||
bf5685f0 C |
82 | function fallbackToMediaSource (useVP9 = false) { |
83 | if (useVP9 === true) console.log('Falling back to media source with VP9 enabled.') | |
84 | else console.log('Falling back to media source..') | |
aa8b6df4 | 85 | |
bf5685f0 | 86 | useMediaSource(useVP9) |
aa8b6df4 C |
87 | } |
88 | ||
89 | function prepareElem () { | |
90 | if (preparedElem === undefined) { | |
91 | preparedElem = elem | |
92 | ||
93 | preparedElem.addEventListener('progress', function () { | |
94 | currentTime = elem.currentTime | |
95 | }) | |
96 | } | |
97 | } | |
98 | ||
99 | function onLoadStart () { | |
100 | preparedElem.removeEventListener('loadstart', onLoadStart) | |
101 | if (opts.autoplay) preparedElem.play() | |
aa8b6df4 | 102 | |
aa8b6df4 C |
103 | callback(null, renderer) |
104 | } | |
105 | } | |
106 | ||
107 | function validateFile (file) { | |
108 | if (file == null) { | |
109 | throw new Error('file cannot be null or undefined') | |
110 | } | |
111 | if (typeof file.name !== 'string') { | |
112 | throw new Error('missing or invalid file.name property') | |
113 | } | |
114 | if (typeof file.createReadStream !== 'function') { | |
115 | throw new Error('missing or invalid file.createReadStream property') | |
116 | } | |
117 | } | |
118 | ||
bf5685f0 | 119 | function getCodec (name: string, useVP9 = false) { |
aa8b6df4 | 120 | const ext = extname(name).toLowerCase() |
bf5685f0 C |
121 | if (ext === '.mp4') { |
122 | return 'video/mp4; codecs="avc1.640029, mp4a.40.5"' | |
123 | } | |
124 | ||
125 | if (ext === '.webm') { | |
126 | if (useVP9 === true) return 'video/webm; codecs="vp9, opus"' | |
127 | ||
128 | return 'video/webm; codecs="vp8, vorbis"' | |
129 | } | |
130 | ||
131 | return undefined | |
aa8b6df4 C |
132 | } |
133 | ||
134 | export { | |
135 | renderVideo | |
136 | } |