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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 | ||
36 | if (VIDEOSTREAM_EXTS.indexOf(extension) >= 0) { | |
37 | renderer = useVideostream() | |
38 | } else { | |
39 | renderer = useMediaSource() | |
40 | } | |
41 | ||
42 | function useVideostream () { | |
43 | prepareElem() | |
bf5685f0 C |
44 | preparedElem.addEventListener('error', function onError () { |
45 | preparedElem.removeEventListener('error', onError) | |
46 | ||
47 | return fallbackToMediaSource() | |
48 | }) | |
aa8b6df4 | 49 | preparedElem.addEventListener('loadstart', onLoadStart) |
aa8b6df4 C |
50 | return videostream(file, preparedElem) |
51 | } | |
52 | ||
bf5685f0 C |
53 | function useMediaSource (useVP9 = false) { |
54 | const codecs = getCodec(file.name, useVP9) | |
55 | ||
aa8b6df4 | 56 | prepareElem() |
bf5685f0 C |
57 | preparedElem.addEventListener('error', function onError(err) { |
58 | // Try with vp9 before returning an error | |
59 | if (codecs.indexOf('vp8') !== -1) { | |
60 | preparedElem.removeEventListener('error', onError) | |
61 | ||
62 | return fallbackToMediaSource(true) | |
63 | } | |
64 | ||
65 | return callback(err) | |
66 | }) | |
aa8b6df4 | 67 | preparedElem.addEventListener('loadstart', onLoadStart) |
aa8b6df4 C |
68 | |
69 | const wrapper = new MediaElementWrapper(preparedElem) | |
bf5685f0 | 70 | const writable = wrapper.createWriteStream(codecs) |
aa8b6df4 C |
71 | file.createReadStream().pipe(writable) |
72 | ||
73 | if (currentTime) preparedElem.currentTime = currentTime | |
74 | ||
75 | return wrapper | |
76 | } | |
77 | ||
bf5685f0 C |
78 | function fallbackToMediaSource (useVP9 = false) { |
79 | if (useVP9 === true) console.log('Falling back to media source with VP9 enabled.') | |
80 | else console.log('Falling back to media source..') | |
aa8b6df4 | 81 | |
bf5685f0 | 82 | useMediaSource(useVP9) |
aa8b6df4 C |
83 | } |
84 | ||
85 | function prepareElem () { | |
86 | if (preparedElem === undefined) { | |
87 | preparedElem = elem | |
88 | ||
89 | preparedElem.addEventListener('progress', function () { | |
90 | currentTime = elem.currentTime | |
91 | }) | |
92 | } | |
93 | } | |
94 | ||
95 | function onLoadStart () { | |
96 | preparedElem.removeEventListener('loadstart', onLoadStart) | |
97 | if (opts.autoplay) preparedElem.play() | |
aa8b6df4 | 98 | |
aa8b6df4 C |
99 | callback(null, renderer) |
100 | } | |
101 | } | |
102 | ||
103 | function validateFile (file) { | |
104 | if (file == null) { | |
105 | throw new Error('file cannot be null or undefined') | |
106 | } | |
107 | if (typeof file.name !== 'string') { | |
108 | throw new Error('missing or invalid file.name property') | |
109 | } | |
110 | if (typeof file.createReadStream !== 'function') { | |
111 | throw new Error('missing or invalid file.createReadStream property') | |
112 | } | |
113 | } | |
114 | ||
bf5685f0 | 115 | function getCodec (name: string, useVP9 = false) { |
aa8b6df4 | 116 | const ext = extname(name).toLowerCase() |
bf5685f0 C |
117 | if (ext === '.mp4') { |
118 | return 'video/mp4; codecs="avc1.640029, mp4a.40.5"' | |
119 | } | |
120 | ||
121 | if (ext === '.webm') { | |
122 | if (useVP9 === true) return 'video/webm; codecs="vp9, opus"' | |
123 | ||
124 | return 'video/webm; codecs="vp8, vorbis"' | |
125 | } | |
126 | ||
127 | return undefined | |
aa8b6df4 C |
128 | } |
129 | ||
130 | export { | |
131 | renderVideo | |
132 | } |