├── .gitignore
├── LICENSE
├── README.md
├── dist
├── videocompositor.commonjs2.js
└── videocompositor.js
├── doc
├── ast
│ └── source
│ │ ├── audiomanager.js.json
│ │ ├── effect.js.json
│ │ ├── effectmanager.js.json
│ │ ├── main.js.json
│ │ └── sources
│ │ ├── canvassource.js.json
│ │ ├── imagesource.js.json
│ │ ├── mediasource.js.json
│ │ └── videosource.js.json
├── badge.svg
├── class
│ └── src
│ │ ├── audiomanager.js~AudioManager.html
│ │ ├── effect.js~Effect.html
│ │ ├── effectmanager.js~EffectManager.html
│ │ ├── main.js~VideoCompositor.html
│ │ └── sources
│ │ ├── canvassource.js~CanvasSource.html
│ │ ├── imagesource.js~ImageSource.html
│ │ ├── mediasource.js~MediaSource.html
│ │ └── videosource.js~VideoSource.html
├── coverage.json
├── css
│ ├── prettify-tomorrow.css
│ └── style.css
├── dump.json
├── file
│ └── src
│ │ ├── audiomanager.js.html
│ │ ├── effect.js.html
│ │ ├── effectmanager.js.html
│ │ ├── main.js.html
│ │ └── sources
│ │ ├── canvassource.js.html
│ │ ├── imagesource.js.html
│ │ ├── mediasource.js.html
│ │ └── videosource.js.html
├── identifiers.html
├── image
│ ├── badge.svg
│ ├── github.png
│ └── search.png
├── index.html
├── package.json
├── script
│ ├── inherited-summary.js
│ ├── inner-link.js
│ ├── patch-for-local.js
│ ├── prettify
│ │ ├── Apache-License-2.0.txt
│ │ └── prettify.js
│ ├── pretty-print.js
│ ├── search.js
│ ├── search_index.js
│ └── test-summary.js
├── source.html
└── variable
│ └── index.html
├── esdoc.json
├── examples
└── progress-bar.html
├── package.json
├── src
├── audiomanager.js
├── effect.js
├── effectmanager.js
├── main.js
└── sources
│ ├── canvassource.js
│ ├── imagesource.js
│ ├── mediasource.js
│ └── videosource.js
├── tutorial
├── 1.png
├── 2.png
├── 3.png
├── 4.png
├── 5.png
├── 6.png
└── tutorial.md
├── webpack.commonjs2.config.js
└── webpack.config.js
/.gitignore:
--------------------------------------------------------------------------------
1 | node_modules
2 | npm-debug.log
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
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/README.md:
--------------------------------------------------------------------------------
1 | # HTML5-Video-Compositor
2 |
3 | **Note: For new projects please consider using the [VideoContext](https://github.com/bbc/videocontext), a new and improved library from BBC R&D which overcomes some of the limitations of the html5-video-compositor.**
4 |
5 | A shader based video composition engine for the browser.
6 |
7 | ```HTML
8 |
9 |
10 |
11 |
12 |
13 |
28 |
2 |
3 |
4 |
7 |
12 | document
13 | document
14 | 38%
15 | 38%
16 |
17 |
18 |
--------------------------------------------------------------------------------
/doc/coverage.json:
--------------------------------------------------------------------------------
1 | {
2 | "coverage": "38.21%",
3 | "expectCount": 123,
4 | "actualCount": 47,
5 | "files": {
6 | "src/audiomanager.js": {
7 | "expectCount": 12,
8 | "actualCount": 0,
9 | "undocumentLines": [
10 | 24,
11 | 26,
12 | 102,
13 | 28,
14 | 29,
15 | 61,
16 | 25,
17 | 32,
18 | 45,
19 | 55,
20 | 27,
21 | 67
22 | ]
23 | },
24 | "src/sources/canvassource.js": {
25 | "expectCount": 12,
26 | "actualCount": 5,
27 | "undocumentLines": [
28 | 4,
29 | 72,
30 | 60,
31 | 21,
32 | 51,
33 | 67,
34 | 20
35 | ]
36 | },
37 | "src/effect.js": {
38 | "expectCount": 11,
39 | "actualCount": 0,
40 | "undocumentLines": [
41 | 69,
42 | 70,
43 | 141,
44 | 95,
45 | 71,
46 | 121,
47 | 110,
48 | 127,
49 | 126,
50 | 131,
51 | 72
52 | ]
53 | },
54 | "src/effectmanager.js": {
55 | "expectCount": 8,
56 | "actualCount": 0,
57 | "undocumentLines": [
58 | 3,
59 | 4,
60 | 43,
61 | 5,
62 | 31,
63 | 6,
64 | 11,
65 | 17
66 | ]
67 | },
68 | "src/main.js": {
69 | "expectCount": 30,
70 | "actualCount": 22,
71 | "undocumentLines": [
72 | 1294,
73 | 1148,
74 | 1044,
75 | 30,
76 | 63,
77 | 83,
78 | 73,
79 | 1458
80 | ]
81 | },
82 | "src/sources/imagesource.js": {
83 | "expectCount": 12,
84 | "actualCount": 5,
85 | "undocumentLines": [
86 | 4,
87 | 59,
88 | 53,
89 | 75,
90 | 50,
91 | 70,
92 | 52
93 | ]
94 | },
95 | "src/sources/mediasource.js": {
96 | "expectCount": 24,
97 | "actualCount": 8,
98 | "undocumentLines": [
99 | 3,
100 | 34,
101 | 23,
102 | 27,
103 | 21,
104 | 31,
105 | 22,
106 | 227,
107 | 32,
108 | 223,
109 | 25,
110 | 26,
111 | 28,
112 | 24,
113 | 29,
114 | 30
115 | ]
116 | },
117 | "src/sources/videosource.js": {
118 | "expectCount": 14,
119 | "actualCount": 7,
120 | "undocumentLines": [
121 | 16,
122 | 112,
123 | 107,
124 | 105,
125 | 33,
126 | 156,
127 | 106
128 | ]
129 | }
130 | }
131 | }
--------------------------------------------------------------------------------
/doc/css/prettify-tomorrow.css:
--------------------------------------------------------------------------------
1 | /* Tomorrow Theme */
2 | /* Original theme - https://github.com/chriskempson/tomorrow-theme */
3 | /* Pretty printing styles. Used with prettify.js. */
4 | /* SPAN elements with the classes below are added by prettyprint. */
5 | /* plain text */
6 | .pln {
7 | color: #4d4d4c; }
8 |
9 | @media screen {
10 | /* string content */
11 | .str {
12 | color: #718c00; }
13 |
14 | /* a keyword */
15 | .kwd {
16 | color: #8959a8; }
17 |
18 | /* a comment */
19 | .com {
20 | color: #8e908c; }
21 |
22 | /* a type name */
23 | .typ {
24 | color: #4271ae; }
25 |
26 | /* a literal value */
27 | .lit {
28 | color: #f5871f; }
29 |
30 | /* punctuation */
31 | .pun {
32 | color: #4d4d4c; }
33 |
34 | /* lisp open bracket */
35 | .opn {
36 | color: #4d4d4c; }
37 |
38 | /* lisp close bracket */
39 | .clo {
40 | color: #4d4d4c; }
41 |
42 | /* a markup tag name */
43 | .tag {
44 | color: #c82829; }
45 |
46 | /* a markup attribute name */
47 | .atn {
48 | color: #f5871f; }
49 |
50 | /* a markup attribute value */
51 | .atv {
52 | color: #3e999f; }
53 |
54 | /* a declaration */
55 | .dec {
56 | color: #f5871f; }
57 |
58 | /* a variable name */
59 | .var {
60 | color: #c82829; }
61 |
62 | /* a function name */
63 | .fun {
64 | color: #4271ae; } }
65 | /* Use higher contrast and text-weight for printable form. */
66 | @media print, projection {
67 | .str {
68 | color: #060; }
69 |
70 | .kwd {
71 | color: #006;
72 | font-weight: bold; }
73 |
74 | .com {
75 | color: #600;
76 | font-style: italic; }
77 |
78 | .typ {
79 | color: #404;
80 | font-weight: bold; }
81 |
82 | .lit {
83 | color: #044; }
84 |
85 | .pun, .opn, .clo {
86 | color: #440; }
87 |
88 | .tag {
89 | color: #006;
90 | font-weight: bold; }
91 |
92 | .atn {
93 | color: #404; }
94 |
95 | .atv {
96 | color: #060; } }
97 | /* Style */
98 | /*
99 | pre.prettyprint {
100 | background: white;
101 | font-family: Consolas, Monaco, 'Andale Mono', monospace;
102 | font-size: 12px;
103 | line-height: 1.5;
104 | border: 1px solid #ccc;
105 | padding: 10px; }
106 | */
107 |
108 | /* Specify class=linenums on a pre to get line numbering */
109 | ol.linenums {
110 | margin-top: 0;
111 | margin-bottom: 0; }
112 |
113 | /* IE indents via margin-left */
114 | li.L0,
115 | li.L1,
116 | li.L2,
117 | li.L3,
118 | li.L4,
119 | li.L5,
120 | li.L6,
121 | li.L7,
122 | li.L8,
123 | li.L9 {
124 | /* */ }
125 |
126 | /* Alternate shading for lines */
127 | li.L1,
128 | li.L3,
129 | li.L5,
130 | li.L7,
131 | li.L9 {
132 | /* */ }
133 |
--------------------------------------------------------------------------------
/doc/css/style.css:
--------------------------------------------------------------------------------
1 | @import url(https://fonts.googleapis.com/css?family=Roboto:400,300,700);
2 |
3 | * {
4 | margin: 0;
5 | padding: 0;
6 | text-decoration: none;
7 | }
8 |
9 | html
10 | {
11 | font-family: 'Roboto', sans-serif;
12 | overflow: auto;
13 | font-size: 14px;
14 | /*color: #4d4e53;*/
15 | color: rgba(0, 0, 0, .68);
16 | background-color: #fff;
17 | }
18 |
19 | a {
20 | /*color: #0095dd;*/
21 | /*color:rgb(37, 138, 175);*/
22 | color: #039BE5;
23 | }
24 |
25 | code a:hover {
26 | text-decoration: underline;
27 | }
28 |
29 | ul, ol {
30 | padding-left: 20px;
31 | }
32 |
33 | ul li {
34 | list-style: disc;
35 | margin: 4px 0;
36 | }
37 |
38 | ol li {
39 | margin: 4px 0;
40 | }
41 |
42 | h1 {
43 | margin-bottom: 10px;
44 | font-size: 34px;
45 | font-weight: 300;
46 | border-bottom: solid 1px #ddd;
47 | }
48 |
49 | h2 {
50 | margin-top: 24px;
51 | margin-bottom: 10px;
52 | font-size: 20px;
53 | border-bottom: solid 1px #ddd;
54 | font-weight: 300;
55 | }
56 |
57 | h3 {
58 | position: relative;
59 | font-size: 16px;
60 | margin-bottom: 12px;
61 | background-color: #E2E2E2;
62 | padding: 4px;
63 | font-weight: 300;
64 | }
65 |
66 | del {
67 | text-decoration: line-through;
68 | }
69 |
70 | p {
71 | margin-bottom: 15px;
72 | line-height: 19px;
73 | }
74 |
75 | p > code {
76 | background-color: #f5f5f5;
77 | border-radius: 3px;
78 | }
79 |
80 | pre > code {
81 | display: block;
82 | }
83 |
84 | pre.prettyprint, pre > code {
85 | padding: 4px;
86 | margin: 1em 0;
87 | background-color: #f5f5f5;
88 | border-radius: 3px;
89 | }
90 |
91 | pre.prettyprint > code {
92 | margin: 0;
93 | }
94 |
95 | p > code,
96 | li > code {
97 | padding: 0 4px;
98 | border-radius: 3px;
99 | }
100 |
101 | .import-path pre.prettyprint,
102 | .import-path pre.prettyprint code {
103 | margin: 0;
104 | padding: 0;
105 | border: none;
106 | background: white;
107 | }
108 |
109 | .layout-container {
110 | /*display: flex;*/
111 | /*flex-direction: row;*/
112 | /*justify-content: flex-start;*/
113 | /*align-items: stretch;*/
114 | }
115 |
116 | .layout-container > header {
117 | height: 40px;
118 | line-height: 40px;
119 | font-size: 16px;
120 | padding: 0 10px;
121 | margin: 0;
122 | position: fixed;
123 | width: 100%;
124 | z-index: 1;
125 | background-color: white;
126 | top: 0;
127 | border-bottom: solid 1px #E02130;
128 | }
129 | .layout-container > header > a{
130 | margin: 0 5px;
131 | }
132 |
133 | .layout-container > header > a.repo-url-github {
134 | font-size: 0;
135 | display: inline-block;
136 | width: 20px;
137 | height: 38px;
138 | background: url("../image/github.png") no-repeat center;
139 | background-size: 20px;
140 | vertical-align: top;
141 | }
142 |
143 | .navigation {
144 | position: fixed;
145 | top: 0;
146 | left: 0;
147 | box-sizing: border-box;
148 | width: 250px;
149 | height: 100%;
150 | padding-top: 40px;
151 | padding-left: 15px;
152 | padding-bottom: 2em;
153 | margin-top:1em;
154 | overflow-x: scroll;
155 | box-shadow: rgba(255, 255, 255, 1) -1px 0 0 inset;
156 | border-right: 1px solid rgba(0, 0, 0, 0.1);
157 | }
158 |
159 | .navigation ul {
160 | padding: 0;
161 | }
162 |
163 | .navigation li {
164 | list-style: none;
165 | margin: 4px 0;
166 | white-space: nowrap;
167 | }
168 |
169 | .navigation .nav-dir-path {
170 | margin-top: 0.7em;
171 | margin-bottom: 0.25em;
172 | font-size: 0.8em;
173 | color: #aaa;
174 | }
175 |
176 | .kind-class,
177 | .kind-interface,
178 | .kind-function,
179 | .kind-typedef,
180 | .kind-variable,
181 | .kind-external {
182 | margin-left: 0.75em;
183 | width: 1.2em;
184 | height: 1.2em;
185 | display: inline-block;
186 | text-align: center;
187 | border-radius: 0.2em;
188 | margin-right: 0.2em;
189 | font-weight: bold;
190 | }
191 |
192 | .kind-class {
193 | color: #009800;
194 | background-color: #bfe5bf;
195 | }
196 |
197 | .kind-interface {
198 | color: #fbca04;
199 | background-color: #fef2c0;
200 | }
201 |
202 | .kind-function {
203 | color: #6b0090;
204 | background-color: #d6bdde;
205 | }
206 |
207 | .kind-variable {
208 | color: #eb6420;
209 | background-color: #fad8c7;
210 | }
211 |
212 | .kind-typedef {
213 | color: #db001e;
214 | background-color: #edbec3;
215 | }
216 |
217 | .kind-external {
218 | color: #0738c3;
219 | background-color: #bbcbea;
220 | }
221 |
222 | h1 .version,
223 | h1 .url a {
224 | font-size: 14px;
225 | color: #aaa;
226 | }
227 |
228 | .content {
229 | margin-top: 40px;
230 | margin-left: 250px;
231 | padding: 10px 50px 10px 20px;
232 | }
233 |
234 | .header-notice {
235 | font-size: 14px;
236 | color: #aaa;
237 | margin: 0;
238 | }
239 |
240 | .expression-extends .prettyprint {
241 | margin-left: 10px;
242 | background: white;
243 | }
244 |
245 | .extends-chain {
246 | border-bottom: 1px solid#ddd;
247 | padding-bottom: 10px;
248 | margin-bottom: 10px;
249 | }
250 |
251 | .extends-chain span:nth-of-type(1) {
252 | padding-left: 10px;
253 | }
254 |
255 | .extends-chain > div {
256 | margin: 5px 0;
257 | }
258 |
259 | .description table {
260 | font-size: 14px;
261 | border-spacing: 0;
262 | border: 0;
263 | border-collapse: collapse;
264 | }
265 |
266 | .description thead {
267 | background: #999;
268 | color: white;
269 | }
270 |
271 | .description table td,
272 | .description table th {
273 | border: solid 1px #ddd;
274 | padding: 4px;
275 | font-weight: normal;
276 | }
277 |
278 | .flat-list ul {
279 | padding-left: 0;
280 | }
281 |
282 | .flat-list li {
283 | display: inline;
284 | list-style: none;
285 | }
286 |
287 | table.summary {
288 | width: 100%;
289 | margin: 10px 0;
290 | border-spacing: 0;
291 | border: 0;
292 | border-collapse: collapse;
293 | }
294 |
295 | table.summary thead {
296 | background: #999;
297 | color: white;
298 | }
299 |
300 | table.summary td {
301 | border: solid 1px #ddd;
302 | padding: 4px 10px;
303 | }
304 |
305 | table.summary tbody td:nth-child(1) {
306 | text-align: right;
307 | white-space: nowrap;
308 | min-width: 64px;
309 | vertical-align: top;
310 | }
311 |
312 | table.summary tbody td:nth-child(2) {
313 | width: 100%;
314 | border-right: none;
315 | }
316 |
317 | table.summary tbody td:nth-child(3) {
318 | white-space: nowrap;
319 | border-left: none;
320 | vertical-align: top;
321 | }
322 |
323 | table.summary td > div:nth-of-type(2) {
324 | padding-top: 4px;
325 | padding-left: 15px;
326 | }
327 |
328 | table.summary td p {
329 | margin-bottom: 0;
330 | }
331 |
332 | .inherited-summary thead td {
333 | padding-left: 2px;
334 | }
335 |
336 | .inherited-summary thead a {
337 | color: white;
338 | }
339 |
340 | .inherited-summary .summary tbody {
341 | display: none;
342 | }
343 |
344 | .inherited-summary .summary .toggle {
345 | padding: 0 4px;
346 | font-size: 12px;
347 | cursor: pointer;
348 | }
349 | .inherited-summary .summary .toggle.closed:before {
350 | content: "▶";
351 | }
352 | .inherited-summary .summary .toggle.opened:before {
353 | content: "▼";
354 | }
355 |
356 | .member, .method {
357 | margin-bottom: 24px;
358 | }
359 |
360 | table.params {
361 | width: 100%;
362 | margin: 10px 0;
363 | border-spacing: 0;
364 | border: 0;
365 | border-collapse: collapse;
366 | }
367 |
368 | table.params thead {
369 | background: #eee;
370 | color: #aaa;
371 | }
372 |
373 | table.params td {
374 | padding: 4px;
375 | border: solid 1px #ddd;
376 | }
377 |
378 | table.params td p {
379 | margin: 0;
380 | }
381 |
382 | .content .detail > * {
383 | margin: 15px 0;
384 | }
385 |
386 | .content .detail > h3 {
387 | color: black;
388 | }
389 |
390 | .content .detail > div {
391 | margin-left: 10px;
392 | }
393 |
394 | .content .detail > .import-path {
395 | margin-top: -8px;
396 | }
397 |
398 | .content .detail + .detail {
399 | margin-top: 30px;
400 | }
401 |
402 | .content .detail .throw td:first-child {
403 | padding-right: 10px;
404 | }
405 |
406 | .content .detail h4 + :not(pre) {
407 | padding-left: 0;
408 | margin-left: 10px;
409 | }
410 |
411 | .content .detail h4 + ul li {
412 | list-style: none;
413 | }
414 |
415 | .return-param * {
416 | display: inline;
417 | }
418 |
419 | .argument-params {
420 | margin-bottom: 20px;
421 | }
422 |
423 | .return-type {
424 | padding-right: 10px;
425 | font-weight: normal;
426 | }
427 |
428 | .return-desc {
429 | margin-left: 10px;
430 | margin-top: 4px;
431 | }
432 |
433 | .return-desc p {
434 | margin: 0;
435 | }
436 |
437 | .deprecated, .experimental, .instance-docs {
438 | border-left: solid 5px orange;
439 | padding-left: 4px;
440 | margin: 4px 0;
441 | }
442 |
443 | tr.listen p,
444 | tr.throw p,
445 | tr.emit p{
446 | margin-bottom: 10px;
447 | }
448 |
449 | .version, .since {
450 | color: #aaa;
451 | }
452 |
453 | h3 .right-info {
454 | position: absolute;
455 | right: 4px;
456 | font-size: 14px;
457 | }
458 |
459 | .version + .since:before {
460 | content: '| ';
461 | }
462 |
463 | .see {
464 | margin-top: 10px;
465 | }
466 |
467 | .see h4 {
468 | margin: 4px 0;
469 | }
470 |
471 | .content .detail h4 + .example-doc {
472 | margin: 6px 0;
473 | }
474 |
475 | .example-caption {
476 | position: relative;
477 | bottom: -1px;
478 | display: inline-block;
479 | padding: 4px;
480 | font-style: italic;
481 | background-color: #f5f5f5;
482 | font-weight: bold;
483 | border-radius: 3px;
484 | border-bottom-left-radius: 0;
485 | border-bottom-right-radius: 0;
486 | }
487 |
488 | .example-caption + pre.source-code {
489 | margin-top: 0;
490 | border-top-left-radius: 0;
491 | }
492 |
493 | footer, .file-footer {
494 | text-align: right;
495 | font-style: italic;
496 | font-weight: 100;
497 | font-size: 13px;
498 | margin-right: 50px;
499 | margin-left: 270px;
500 | border-top: 1px solid #ddd;
501 | padding-top: 30px;
502 | margin-top: 20px;
503 | padding-bottom: 10px;
504 | }
505 |
506 | pre.source-code {
507 | background: #f5f5f5;
508 | padding: 4px;
509 | }
510 |
511 | pre.raw-source-code > code {
512 | padding: 0;
513 | margin: 0;
514 | }
515 |
516 | pre.source-code.line-number {
517 | padding: 0;
518 | }
519 |
520 | pre.source-code ol {
521 | background: #eee;
522 | padding-left: 40px;
523 | }
524 |
525 | pre.source-code li {
526 | background: white;
527 | padding-left: 4px;
528 | list-style: decimal;
529 | margin: 0;
530 | }
531 |
532 | pre.source-code.line-number li.active {
533 | background: rgb(255, 255, 150);
534 | }
535 |
536 | pre.source-code.line-number li.error-line {
537 | background: #ffb8bf;
538 | }
539 |
540 | table.files-summary {
541 | width: 100%;
542 | margin: 10px 0;
543 | border-spacing: 0;
544 | border: 0;
545 | border-collapse: collapse;
546 | text-align: right;
547 | }
548 |
549 | table.files-summary tbody tr:hover {
550 | background: #eee;
551 | }
552 |
553 | table.files-summary td:first-child,
554 | table.files-summary td:nth-of-type(2) {
555 | text-align: left;
556 | }
557 |
558 | table.files-summary[data-use-coverage="false"] td.coverage {
559 | display: none;
560 | }
561 |
562 | table.files-summary thead {
563 | background: #999;
564 | color: white;
565 | }
566 |
567 | table.files-summary td {
568 | border: solid 1px #ddd;
569 | padding: 4px 10px;
570 | vertical-align: top;
571 | }
572 |
573 | table.files-summary td.identifiers > span {
574 | display: block;
575 | margin-top: 4px;
576 | }
577 | table.files-summary td.identifiers > span:first-child {
578 | margin-top: 0;
579 | }
580 |
581 | table.files-summary .coverage-count {
582 | font-size: 12px;
583 | color: #aaa;
584 | display: inline-block;
585 | min-width: 40px;
586 | }
587 |
588 | .total-coverage-count {
589 | position: relative;
590 | bottom: 2px;
591 | font-size: 12px;
592 | color: #666;
593 | font-weight: 500;
594 | padding-left: 5px;
595 | }
596 |
597 | table.test-summary thead {
598 | background: #999;
599 | color: white;
600 | }
601 |
602 | table.test-summary thead .test-description {
603 | width: 50%;
604 | }
605 |
606 | table.test-summary {
607 | width: 100%;
608 | margin: 10px 0;
609 | border-spacing: 0;
610 | border: 0;
611 | border-collapse: collapse;
612 | }
613 |
614 | table.test-summary thead .test-count {
615 | width: 3em;
616 | }
617 |
618 | table.test-summary tbody tr:hover {
619 | background-color: #eee;
620 | }
621 |
622 | table.test-summary td {
623 | border: solid 1px #ddd;
624 | padding: 4px 10px;
625 | vertical-align: top;
626 | }
627 |
628 | table.test-summary td p {
629 | margin: 0;
630 | }
631 |
632 | table.test-summary tr.test-describe .toggle {
633 | display: inline-block;
634 | float: left;
635 | margin-right: 4px;
636 | cursor: pointer;
637 | }
638 |
639 | table.test-summary tr.test-describe .toggle.opened:before {
640 | content: '▼';
641 | }
642 |
643 | table.test-summary tr.test-describe .toggle.closed:before {
644 | content: '▶';
645 | }
646 |
647 | table.test-summary .test-target > span {
648 | display: block;
649 | margin-top: 4px;
650 | }
651 | table.test-summary .test-target > span:first-child {
652 | margin-top: 0;
653 | }
654 |
655 | .inner-link-active {
656 | background: rgb(255, 255, 150);
657 | }
658 |
659 | /* search box */
660 | .search-box {
661 | position: absolute;
662 | top: 10px;
663 | right: 50px;
664 | padding-right: 8px;
665 | padding-bottom: 10px;
666 | line-height: normal;
667 | font-size: 12px;
668 | }
669 |
670 | .search-box img {
671 | width: 20px;
672 | vertical-align: top;
673 | }
674 |
675 | .search-input {
676 | display: inline;
677 | visibility: hidden;
678 | width: 0;
679 | padding: 2px;
680 | height: 1.5em;
681 | outline: none;
682 | background: transparent;
683 | border: 1px #0af;
684 | border-style: none none solid none;
685 | vertical-align: bottom;
686 | }
687 |
688 | .search-input-edge {
689 | display: none;
690 | width: 1px;
691 | height: 5px;
692 | background-color: #0af;
693 | vertical-align: bottom;
694 | }
695 |
696 | .search-result {
697 | position: absolute;
698 | display: none;
699 | height: 600px;
700 | width: 100%;
701 | padding: 0;
702 | margin-top: 5px;
703 | margin-left: 24px;
704 | background: white;
705 | box-shadow: 1px 1px 4px rgb(0,0,0);
706 | white-space: nowrap;
707 | overflow-y: scroll;
708 | }
709 |
710 | .search-result-import-path {
711 | color: #aaa;
712 | font-size: 12px;
713 | }
714 |
715 | .search-result li {
716 | list-style: none;
717 | padding: 2px 4px;
718 | }
719 |
720 | .search-result li a {
721 | display: block;
722 | }
723 |
724 | .search-result li.selected {
725 | background: #ddd;
726 | }
727 |
728 | .search-result li.search-separator {
729 | background: rgb(37, 138, 175);
730 | color: white;
731 | }
732 |
733 | .search-box.active .search-input {
734 | visibility: visible;
735 | transition: width 0.2s ease-out;
736 | width: 300px;
737 | }
738 |
739 | .search-box.active .search-input-edge {
740 | display: inline-block;
741 | }
742 |
743 | /* coverage badge */
744 | .esdoc-coverage {
745 | display: inline-block;
746 | height: 20px;
747 | vertical-align: top;
748 | }
749 |
750 | h1 .esdoc-coverage {
751 | position: relative;
752 | top: -4px;
753 | }
754 |
755 | .esdoc-coverage-wrap {
756 | color: white;
757 | font-size: 12px;
758 | font-weight: 500;
759 | }
760 |
761 | .esdoc-coverage-label {
762 | padding: 3px 4px 3px 6px;
763 | background: linear-gradient(to bottom, #5e5e5e 0%,#4c4c4c 100%);
764 | border-radius: 4px 0 0 4px;
765 | display: inline-block;
766 | height: 20px;
767 | box-sizing: border-box;
768 | line-height: 14px;
769 | }
770 |
771 | .esdoc-coverage-ratio {
772 | padding: 3px 6px 3px 4px;
773 | border-radius: 0 4px 4px 0;
774 | display: inline-block;
775 | height: 20px;
776 | box-sizing: border-box;
777 | line-height: 14px;
778 | }
779 |
780 | .esdoc-coverage-low {
781 | background: linear-gradient(to bottom, #db654f 0%,#c9533d 100%);
782 | }
783 |
784 | .esdoc-coverage-middle {
785 | background: linear-gradient(to bottom, #dab226 0%,#c9a179 100%);
786 | }
787 |
788 | .esdoc-coverage-high {
789 | background: linear-gradient(to bottom, #4fc921 0%,#3eb810 100%);
790 | }
791 |
792 | /* github markdown */
793 | .github-markdown {
794 | font-size: 16px;
795 | }
796 |
797 | .github-markdown h1,
798 | .github-markdown h2,
799 | .github-markdown h3,
800 | .github-markdown h4,
801 | .github-markdown h5 {
802 | margin-top: 1em;
803 | margin-bottom: 16px;
804 | font-weight: bold;
805 | padding: 0;
806 | }
807 |
808 | .github-markdown h1:nth-of-type(1) {
809 | margin-top: 0;
810 | }
811 |
812 | .github-markdown h1 {
813 | font-size: 2em;
814 | padding-bottom: 0.3em;
815 | }
816 |
817 | .github-markdown h2 {
818 | font-size: 1.75em;
819 | padding-bottom: 0.3em;
820 | }
821 |
822 | .github-markdown h3 {
823 | font-size: 1.5em;
824 | background-color: transparent;
825 | }
826 |
827 | .github-markdown h4 {
828 | font-size: 1.25em;
829 | }
830 |
831 | .github-markdown h5 {
832 | font-size: 1em;
833 | }
834 |
835 | .github-markdown ul, .github-markdown ol {
836 | padding-left: 2em;
837 | }
838 |
839 | .github-markdown pre > code {
840 | font-size: 0.85em;
841 | }
842 |
843 | .github-markdown table {
844 | margin-bottom: 1em;
845 | border-collapse: collapse;
846 | border-spacing: 0;
847 | }
848 |
849 | .github-markdown table tr {
850 | background-color: #fff;
851 | border-top: 1px solid #ccc;
852 | }
853 |
854 | .github-markdown table th,
855 | .github-markdown table td {
856 | padding: 6px 13px;
857 | border: 1px solid #ddd;
858 | }
859 |
860 | .github-markdown table tr:nth-child(2n) {
861 | background-color: #f8f8f8;
862 | }
863 |
--------------------------------------------------------------------------------
/doc/file/src/audiomanager.js.html:
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1 |
2 |
3 |
4 | src/audiomanager.js | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | src/audiomanager.js
54 |
55 |
56 | function isIdInTrack(id, track){
57 | for (let i = 0; i < track.length; i++) {
58 | if (track[i].id === id){
59 | return true;
60 | }
61 | }
62 | return false;
63 | }
64 |
65 | function getTrackIndexsForId(id, tracks){
66 | let trackIndexs = [];
67 | for (let i = 0; i < tracks.length; i++) {
68 | let track = tracks[i];
69 | if (isIdInTrack(id, track)){
70 | trackIndexs.push(i);
71 | }
72 | }
73 | return trackIndexs;
74 | }
75 |
76 |
77 | class AudioManager {
78 | constructor(audioCtx){
79 | this.audioCtx = audioCtx;
80 | this.tracks = [];
81 | this.audioNodes = new Map();
82 | this.audioOutputNodes = [];
83 | }
84 |
85 | createAudioNodeFromTrack(track){
86 | if (this.audioCtx === undefined){
87 | // There can only be a max of 6 AudioContexts in most browsers, so only instantiate it here rather than in
88 | // constructor as it's genuinley needed. Otherwise having >6 VideoCompositor instances running will break
89 | // the browser.
90 | this.audioCtx = new AudioContext();
91 | }
92 | this.tracks.push(track);
93 | let trackBus = this.audioCtx.createGain();
94 | this.audioOutputNodes.push(trackBus);
95 | return trackBus;
96 | }
97 |
98 | getAudioContext(){
99 | if (this.audioCtx === undefined){
100 | // There can only be a max of 6 AudioContexts in most browsers, so only instantiate it here rather than in
101 | // constructor as it's genuinley needed. Otherwise having >6 VideoCompositor instances running will break
102 | // the browser.
103 | this.audioCtx = new AudioContext();
104 | }
105 | return this.audioCtx;
106 | }
107 |
108 | removeFromCacheById(id){
109 | let node = this.audioNodes.get(id);
110 | node.disconnect();
111 | this.audioNodes.delete(id);
112 | }
113 |
114 | clearAudioNodeCache(){
115 | for (let id of this.audioNodes.keys()){
116 | this.removeFromCacheById(id);
117 | }
118 | }
119 |
120 | update(mediaSources, currentlyPlaying){
121 | let currentlyPlayingIds = [];
122 | for (let i = 0; i < currentlyPlaying.length; i++) {
123 | let mediaSourceRef = currentlyPlaying[i];
124 | currentlyPlayingIds.push(mediaSourceRef.id);
125 | }
126 |
127 | if (mediaSources === undefined) return;
128 | for (let id of mediaSources.keys()) {
129 | let mediaSource = mediaSources.get(id);
130 | let trackIndexs = getTrackIndexsForId(id, this.tracks);
131 | if (trackIndexs.length ===0){
132 | continue; //No mappings for this id
133 | }
134 | if (!this.audioNodes.has(id)){
135 | //if an AudioNode for this id does not exist, create it.
136 | let audioNode;
137 | try{
138 | audioNode = this.audioCtx.createMediaElementSource(mediaSource.element);
139 | } catch (err) {
140 | continue;
141 | }
142 |
143 | this.audioNodes.set(id, audioNode);
144 | //make the connections from the audio node to the appropriate output tracks
145 | for (let i = 0; i < trackIndexs.length; i++) {
146 | let trackIndex = trackIndexs[i];
147 | audioNode.connect(this.audioOutputNodes[trackIndex]);
148 | }
149 | }else {
150 | }
151 | }
152 | //TODO add test to make sure all id's for audio nodes stored in this.audioNodes exist in the current mediaSources, otherwise delete them.
153 | }
154 | }
155 | export default AudioManager;
156 |
157 |
158 |
159 |
src/effect.js | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | src/effect.js
54 |
function refreshTextures(playlistEffectObject, textures, gl){
55 | let textureOffset = 1;
56 |
57 | if (playlistEffectObject.parameters === undefined) return;
58 |
59 | let parameterKeys = Object.keys(playlistEffectObject.parameters);
60 | for (let i = 0; i < parameterKeys.length; i++) {
61 | let key = parameterKeys[i];
62 | let parameter = playlistEffectObject.parameters[key];
63 | if (typeof parameter !== "number"){
64 | let texture = textures[textureOffset-1];
65 | gl.activeTexture(gl.TEXTURE0 + textureOffset);
66 | gl.bindTexture(gl.TEXTURE_2D, texture);
67 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
68 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
69 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
70 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
71 | gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, parameter);
72 | textureOffset += 1;
73 | }
74 | }
75 | }
76 |
77 | function loadTextures(playlistEffectObject, gl){
78 | if (playlistEffectObject.parameters === undefined) return [];
79 | let parameterKeys = Object.keys(playlistEffectObject.parameters);
80 | let textures = [];
81 | for (let i = 0; i < parameterKeys.length; i++) {
82 | let key = parameterKeys[i];
83 | let parameter = playlistEffectObject.parameters[key];
84 | if (typeof parameter !== "number"){
85 | let texture = gl.createTexture();
86 | textures.push(texture);
87 | }
88 | }
89 | refreshTextures(playlistEffectObject, textures, gl);
90 | return textures;
91 | }
92 |
93 |
94 | function compileShader(gl, shaderSource, shaderType) {
95 | let shader = gl.createShader(shaderType);
96 | gl.shaderSource(shader, shaderSource);
97 | gl.compileShader(shader);
98 | let success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
99 | if (!success) {
100 | throw "could not compile shader:" + gl.getShaderInfoLog(shader);
101 | }
102 | return shader;
103 | }
104 |
105 |
106 | function createShaderProgram(gl, vertexShaderSource, fragmentShaderSource){
107 | let vertexShader = compileShader(gl, vertexShaderSource, gl.VERTEX_SHADER);
108 | let fragmentShader = compileShader(gl, fragmentShaderSource, gl.FRAGMENT_SHADER);
109 | let program = gl.createProgram();
110 |
111 | gl.attachShader(program, vertexShader);
112 | gl.attachShader(program, fragmentShader);
113 | gl.linkProgram(program);
114 |
115 | if (!gl.getProgramParameter(program, gl.LINK_STATUS)){
116 | throw {"error":4,"msg":"Can't link shader program for track", toString:function(){return this.msg;}};
117 | }
118 | return program;
119 | }
120 |
121 |
122 | class Effect {
123 | constructor(playlistEffectObject, gl){
124 | this.gl = gl;
125 | this.vertexShaderSrc = playlistEffectObject.effect.vertexShader;
126 | if (this.vertexShaderSrc === undefined){
127 | this.vertexShaderSrc = "\
128 | uniform float progress;\
129 | uniform float duration;\
130 | uniform vec2 source_resolution;\
131 | uniform vec2 output_resolution;\
132 | attribute vec2 a_position;\
133 | attribute vec2 a_texCoord;\
134 | varying vec2 v_texCoord;\
135 | varying float v_progress;\
136 | varying float v_duration;\
137 | varying vec2 v_source_resolution;\
138 | varying vec2 v_output_resolution;\
139 | void main() {\
140 | v_progress = progress;\
141 | v_duration = duration;\
142 | v_source_resolution = source_resolution;\
143 | v_output_resolution = output_resolution;\
144 | gl_Position = vec4(vec2(2.0,2.0)*a_position-vec2(1.0, 1.0), 0.0, 1.0);\
145 | v_texCoord = a_texCoord;\
146 | }";
147 | }
148 | this.fragmentShaderSrc = playlistEffectObject.effect.fragmentShader;
149 | if (this.fragmentShaderSrc === undefined){
150 | this.fragmentShaderSrc = "\
151 | precision mediump float;\
152 | uniform sampler2D u_image;\
153 | varying vec2 v_texCoord;\
154 | varying float v_progress;\
155 | varying float v_duration;\
156 | varying vec2 v_source_resolution;\
157 | varying vec2 v_output_resolution;\
158 | void main(){\
159 | gl_FragColor = texture2D(u_image, v_texCoord);\
160 | }";
161 | }
162 |
163 | this.parameters = playlistEffectObject.parameters;
164 | if (this.parameters === undefined){
165 | this.parameters = {};
166 | }
167 | if (playlistEffectObject.effect.defaultParameters !== undefined){
168 | for (let key in playlistEffectObject.effect.defaultParameters) {
169 | if (this.parameters[key]===undefined){
170 | this.parameters[key] = playlistEffectObject.effect.defaultParameters[key];
171 | }
172 | }
173 | }
174 | this.inputs = playlistEffectObject.inputs;
175 | if (this.inputs === undefined){
176 | this.inputs = [];
177 | }
178 |
179 | this.textures = loadTextures(playlistEffectObject, this.gl);
180 | this.program = createShaderProgram(this.gl, this.vertexShaderSrc, this.fragmentShaderSrc);
181 | }
182 |
183 |
184 | update(playlistEffectObject){
185 | refreshTextures(playlistEffectObject, this.textures, this.gl);
186 | this.inputs = playlistEffectObject.inputs;
187 | if (this.inputs === undefined){
188 | this.inputs = [];
189 | }
190 | }
191 |
192 | }
193 |
194 | export default Effect;
195 |
196 |
src/effectmanager.js | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | src/effectmanager.js
54 |
import Effect from "./effect.js";
55 |
56 | class EffectManager {
57 | constructor(gl){
58 | this.effects = new Map();
59 | this.gl = gl;
60 | //Setup the default effect
61 | this.newEffect("default",{"effect":{}});
62 | }
63 |
64 | newEffect(id, playlistEffectObject){
65 | //The playlist effect object is the representation of the effect stored in the playlist object
66 | let effect = new Effect(playlistEffectObject, this.gl);
67 | this.effects.set(id, effect);
68 | }
69 |
70 | updateEffects(playlistEffectObjects){
71 | if (playlistEffectObjects === undefined) return;
72 | for (let key in playlistEffectObjects){
73 | if (this.effects.has(key)){
74 | //udpate the effect
75 | this.effects.get(key).update(playlistEffectObjects[key]);
76 | } else {
77 | //create the effect
78 | this.newEffect(key, playlistEffectObjects[key]);
79 | }
80 | }
81 | //TODO clean-up effects that don't exist
82 | }
83 |
84 | getEffectForInputId(inputId){
85 | let effectIdList = this.effects.keys();
86 | for (let key of effectIdList) {
87 | var effect = this.effects.get(key);
88 | if (effect.inputs.indexOf(inputId) > -1){
89 | return effect;
90 | }
91 | }
92 | return this.effects.get("default");
93 | }
94 | }
95 |
96 | export default EffectManager;
97 |
98 |
99 |
src/sources/canvassource.js | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | src/sources/canvassource.js
54 |
//Matthew Shotton, R&D User Experince,© BBC 2015
55 | import MediaSource from "./mediasource";
56 |
57 | class CanvasSource extends MediaSource{
58 | /**
59 | * Canvas playback source. Inherits from MediaSource
60 | *
61 | * A CanvasSource is the manifestation of a mediaSourceReference from a playlist object which has type "canvas".
62 | *
63 | * A CanvasSource exists for a period slightly before a CanvasSource is to play in order to give it time to preload and
64 | * is destroyed as soon as the CanvasSource has finished playing.
65 | *
66 | * @param {Object} properties - An object with the following attributes: id, duration, start, and element.
67 | * Where src is the URL of a video, or element is a DOM Video element.
68 | *
69 | * @param {WebGLContext} gl - a webGl context to render too.
70 | */
71 | constructor(properties, gl){
72 | super(properties, gl);
73 | this.width = properties.width;
74 | this.height = properties.height;
75 | }
76 | /**
77 | * Set the CanvasSource playing.
78 | */
79 | play(){
80 | super.play();
81 | }
82 | /**
83 | * Seek to playlist time and do something appropriate with this CavnasSource. This can effect shaders applied to this
84 | * canvas and any MediaSourceListeners listening to the Id of this source.
85 | * @param {number} seekTime - The time to seek too, this is the overall time for the whole playlist.
86 | */
87 | seek(time){
88 | super.seek(time);
89 | }
90 | /**
91 | * Pause the CanvasSource if it is playing.
92 | */
93 | pause(){
94 | super.pause();
95 | }
96 | /**
97 | * Set the CanvasSource loading, when it's ready isReady() will return true.
98 | */
99 | load(){
100 | //check if we're using an already instatiated element, if so don't do anything.
101 | if (super.load()){
102 | this.seek(0);
103 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
104 | this.ready = true;
105 | this.width = this.element.width;
106 | this.height = this.element.height;
107 | this.onready(this);
108 | return;
109 | }
110 |
111 |
112 | //otherwise begin the loading process for this mediaSource
113 | this.element = document.createElement("canvas");
114 | this.element.width = this.width;
115 | this.element.height = this.height;
116 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
117 | this.ready = true;
118 | this.onready(this);
119 | }
120 | render(program, renderParameters, textures){
121 | super.render(program, renderParameters, textures);
122 | }
123 | }
124 |
125 | export default CanvasSource;
126 |
127 |
src/sources/imagesource.js | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | src/sources/imagesource.js
54 |
//Matthew Shotton, R&D User Experince,© BBC 2015
55 | import MediaSource from "./mediasource";
56 |
57 | class ImageSource extends MediaSource{
58 | /**
59 | * Image playback source. Inherits from MediaSource
60 | *
61 | * A ImageSource is the manifestation of a mediaSourceReference from a playlist object which has type "image".
62 | *
63 | * A ImageSource exists for a period slightly before a ImageSource is to play in order to give it time to preload and
64 | * is destroyed as soon as the ImageSource has finished playing.
65 | *
66 | * @param {Object} properties - An object with the following attributes: id, duration, start, and src or element.
67 | * Where src is the URL of a video, or element is a DOM Video element.
68 | *
69 | * @param {WebGLContext} gl - a webGl context to render too.
70 | */
71 | constructor(properties, gl){
72 | super(properties, gl);
73 | }
74 | /**
75 | * Set the ImageSource playing.
76 | */
77 | play(){
78 | super.play();
79 | }
80 | /**
81 | * Seek to playlist time and do something appropriate with this ImageSource. This has little effect on the image as it's
82 | * static but can affect any effect shaders applied to this image and any MediaSourceListeners listening to the Id of
83 | * this source.
84 | * @param {number} seekTime - The time to seek too, this is the overall time for the whole playlist.
85 | */
86 | seek(time){
87 | super.seek(time);
88 | }
89 | /**
90 | * Pause the ImageSource if it is playing.
91 | */
92 | pause(){
93 | super.pause();
94 | }
95 | /**
96 | * Set the ImageSource loading, when it's ready isReady() will return true.
97 | */
98 | load(){
99 | //check if we're using an already instatiated element, if so don't do anything.
100 | if (super.load()){
101 | this.seek(0);
102 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
103 | this.ready = true;
104 | // Upload the image into the texture.
105 | this.width = this.element.width;
106 | this.height = this.element.height;
107 | this.onready(this);
108 | return;
109 | }
110 |
111 | //otherwise begin the loading process for this mediaSource
112 | this.element = new Image();
113 | let _this = this;
114 | this.element.onload = function(){
115 | _this.gl.texImage2D(_this.gl.TEXTURE_2D, 0, _this.gl.RGBA, _this.gl.RGBA, _this.gl.UNSIGNED_BYTE, _this.element);
116 | _this.ready = true;
117 | _this.onready(_this);
118 | _this.width = _this.element.width;
119 | _this.height = _this.element.height;
120 | };
121 | this.element.src = this.src;
122 | }
123 | render(program, renderParameters, textures){
124 | super.render(program, renderParameters, textures);
125 | }
126 | }
127 |
128 | export default ImageSource;
129 |
130 |
src/sources/mediasource.js | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | src/sources/mediasource.js
54 |
//Matthew Shotton, R&D User Experince,© BBC 2015
55 |
56 | class MediaSource {
57 | /**
58 | * Parent class of all MediaSources
59 | *
60 | * A MediaSource is the manifestation of a mediaSourceReference from a playlist object. It typically contains the
61 | * original DOM element to be composited along with a number of functions to load, play, pause, seek and render that
62 | * element to the webgl context.
63 | *
64 | * A MediaSource exists for a period slightly before a MediaSource is to play in order to give it time to preload and
65 | * is destroyed as soon as the MediaSource has finished playing.
66 | *
67 | * @param {Object} properties - An object with the following attributes: id, duration, start, and src or element.
68 | * Where src is the URL of something that can be used to create a DOM element that can be rendered to canvas, or
69 | * element is a DOM element that can be rendered to a canvas.
70 | *
71 | * @param {WebGLContext} gl - a webGl context to render too.
72 | */
73 | constructor(properties, gl){
74 | this.gl = gl;
75 | this.id = properties.id;
76 | this.duration = properties.duration;
77 | this.start = properties.start;
78 | this.playing = false;
79 | this.ready = false;
80 | this.element = undefined;
81 | this.src = undefined;
82 | this.texture = undefined;
83 | this.width = undefined;
84 | this.height = undefined;
85 | this.mediaSourceListeners = [];
86 |
87 | this.disposeOfElementOnDestroy = false;
88 |
89 | //If the mediaSource is created from a src string then it must be resonsible for cleaning itself up.
90 | if (properties.src !== undefined){
91 | this.disposeOfElementOnDestroy = true;
92 | this.src = properties.src;
93 | }else {
94 | //If the MediaSource is created from an element then it should not clean the element up on destruction as it may be used elsewhere.
95 | this.disposeOfElementOnDestroy = false;
96 | this.element = properties.element;
97 | }
98 |
99 |
100 | /*let positionLocation = gl.getAttribLocation(program, "a_position");
101 | let texCoordLocation = gl.getAttribLocation(program, "a_texCoord");*/
102 |
103 | //Hard Code these for now, but this is baaaaaad
104 | let positionLocation = 0;
105 | let texCoordLocation = 1;
106 |
107 | gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
108 | gl.enable ( gl.BLEND) ;
109 | // Create a texture.
110 | this.texture = gl.createTexture();
111 | gl.bindTexture(gl.TEXTURE_2D, this.texture);
112 | gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);
113 | // Set the parameters so we can render any size image.
114 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
115 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
116 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
117 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
118 |
119 |
120 | let buffer = gl.createBuffer();
121 | gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
122 | gl.enableVertexAttribArray(positionLocation);
123 | gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
124 |
125 | gl.bufferData(
126 | gl.ARRAY_BUFFER,
127 | /*new Float32Array([
128 | 1.0, 1.0,
129 | -1.0, 1.0,
130 | 1.0, -1.0,
131 | 1.0, -1.0,
132 | -1.0, 1.0,
133 | -1.0, -1.0]),*/
134 | new Float32Array([
135 | 1.0, 1.0,
136 | 0.0, 1.0,
137 | 1.0, 0.0,
138 | 1.0, 0.0,
139 | 0.0, 1.0,
140 | 0.0, 0.0]),
141 | gl.STATIC_DRAW);
142 | gl.enableVertexAttribArray(texCoordLocation);
143 | gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
144 |
145 | }
146 |
147 | /**
148 | * Set the MediaSource playing.
149 | */
150 | play(){
151 | //console.log("Playing", this.id);
152 | if (this.playing === false){
153 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
154 | if(typeof this.mediaSourceListeners[i].play === 'function')this.mediaSourceListeners[i].play(this);
155 | }
156 | }
157 | this.playing = true;
158 | }
159 | /**
160 | * Pause the MediaSource if it is playing.
161 | */
162 | pause(){
163 | console.debug("Pausing", this.id);
164 | this.playing = false;
165 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
166 | if(typeof this.mediaSourceListeners[i].pause === 'function')this.mediaSourceListeners[i].pause(this);
167 | }
168 | }
169 | /**
170 | * Seek the MediaSource to an appropriate point for the passed time.
171 | * @param {number} seekTime - The time to seek too, this is the overall time for the whole playlist.
172 | */
173 | seek(seekTime){
174 | //this.currentTime = seekTime;
175 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
176 | if(typeof this.mediaSourceListeners[i].seek === 'function')this.mediaSourceListeners[i].seek(this, seekTime);
177 | }
178 | }
179 | /**
180 | * Check if the MediaSource is ready to start playing.
181 | */
182 | isReady(){
183 | let listenerReady = true;
184 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
185 | if(typeof this.mediaSourceListeners[i].isReady === 'function'){
186 | if (this.mediaSourceListeners[i].isReady(this) === false){
187 | listenerReady = false;
188 | }
189 | }
190 | }
191 | if (listenerReady === true && this.ready === true) return true;
192 | return false;
193 | }
194 | /**
195 | * Set the MediaSource loading, when it's ready isReady() will return true.
196 | */
197 | load(){
198 | console.debug("Loading", this.id);
199 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
200 | if(typeof this.mediaSourceListeners[i].load === 'function')this.mediaSourceListeners[i].load(this);
201 | }
202 | if (this.element !== undefined) {
203 | return true;
204 | }
205 | return false;
206 | }
207 | /**
208 | * Clean up the MediaSource for detruction.
209 | */
210 | destroy(){
211 | console.debug("Destroying", this.id);
212 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
213 | if (typeof this.mediaSourceListeners[i].destroy === 'function') this.mediaSourceListeners[i].destroy(this);
214 | }
215 | if (this.disposeOfElementOnDestroy){
216 | delete this.element;
217 | }
218 | }
219 | /**
220 | * Render the MediaSource to the WebGL context passed into the constructor.
221 | */
222 | render(program, renderParameters, textures){
223 | //renders the media source to the WebGL context using the pased program
224 | let overriddenElement;
225 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
226 | if (typeof this.mediaSourceListeners[i].render === 'function'){
227 | let result = this.mediaSourceListeners[i].render(this, renderParameters);
228 | if (result !== undefined) overriddenElement = result;
229 | }
230 | }
231 |
232 | this.gl.useProgram(program);
233 | let renderParametersKeys = Object.keys(renderParameters);
234 | let textureOffset = 1;
235 | for (let index in renderParametersKeys){
236 | let key = renderParametersKeys[index];
237 | let parameterLoctation = this.gl.getUniformLocation(program, key);
238 | if (parameterLoctation !== -1){
239 | if (typeof renderParameters[key] === "number"){
240 | this.gl.uniform1f(parameterLoctation, renderParameters[key]);
241 | }
242 | else if( Object.prototype.toString.call(renderParameters[key]) === '[object Array]'){
243 | let array = renderParameters[key];
244 | if(array.length === 1){
245 | this.gl.uniform1fv(parameterLoctation, array);
246 | } else if(array.length === 2){
247 | this.gl.uniform2fv(parameterLoctation, array);
248 | } else if(array.length === 3){
249 | this.gl.uniform3fv(parameterLoctation, array);
250 | } else if(array.length === 4){
251 | this.gl.uniform4fv(parameterLoctation, array);
252 | } else{
253 | console.debug("Shader parameter", key, "is too long and array:", array);
254 | }
255 | }
256 | else{
257 | //Is a texture
258 | this.gl.activeTexture(this.gl.TEXTURE0 + textureOffset);
259 | this.gl.uniform1i(parameterLoctation, textureOffset);
260 | this.gl.bindTexture(this.gl.TEXTURE_2D, textures[textureOffset-1]);
261 | }
262 | }
263 | }
264 |
265 | this.gl.activeTexture(this.gl.TEXTURE0);
266 | let textureLocation = this.gl.getUniformLocation(program, "u_image");
267 | this.gl.uniform1i(textureLocation, 0);
268 | this.gl.bindTexture(this.gl.TEXTURE_2D, this.texture);
269 | if (overriddenElement !== undefined){
270 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, overriddenElement);
271 | } else {
272 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
273 | }
274 | this.gl.drawArrays(this.gl.TRIANGLES, 0, 6);
275 | }
276 | onready(mediaSource){
277 | }
278 | }
279 |
280 | export default MediaSource;
281 |
282 |
src/sources/videosource.js | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | src/sources/videosource.js
54 |
//Matthew Shotton, R&D User Experince,© BBC 2015
55 | import MediaSource from "./mediasource";
56 |
57 |
58 | function eventOneTime(element, type, callback){
59 | let handleEvent = function(e){
60 | e.target.removeEventListener(e.type, handleEvent);
61 | return callback(e);
62 | };
63 |
64 | element.addEventListener(type, handleEvent, false);
65 | }
66 |
67 |
68 |
69 | class VideoSource extends MediaSource{
70 | /**
71 | * Video playback source. Inherits from MediaSource
72 | *
73 | * A VideoSource is the manifestation of a mediaSourceReference from a playlist object which has type "video".
74 | *
75 | * A VideoSource exists for a period slightly before a VideoSource is to play in order to give it time to preload and
76 | * is destroyed as soon as the VideoSource has finished playing. You can define an offset into the original video to
77 | * start playing by passing in a sourceStart value in the properties.
78 | *
79 | * @param {Object} properties - An object with the following attributes: id, duration, start, sourceStart, and src or element.
80 | * Where src is the URL of a video, or element is a DOM Video element.
81 | *
82 | * @param {WebGLContext} gl - a webGl context to render too.
83 | */
84 | constructor(properties, gl){
85 | super(properties, gl);
86 | this.sourceStart = 0;
87 | this._volume = 1.0;
88 | if (properties.sourceStart !== undefined){
89 | this.sourceStart = properties.sourceStart;
90 | }
91 | if (properties.volume !== undefined){
92 | this._volume = properties.volume;
93 | }
94 | }
95 | /**
96 | * Set the VideoSource playing.
97 | */
98 | play(){
99 | super.play();
100 | let _this = this;
101 |
102 | let playVideo = function(){
103 | if (_this.element.readyState > 3){
104 | _this.ready = true;
105 | _this.element.play();
106 | } else {
107 | console.debug("Can't play video due to readyState");
108 | _this.ready = false;
109 | eventOneTime(_this.element, "canplay", playVideo);
110 | }
111 | };
112 |
113 | playVideo();
114 | }
115 | /**
116 | * Seek the VideoSource to an appropriate point for the passed time.
117 | * @param {number} seekTime - The time to seek too, this is the overall time for the whole playlist.
118 | */
119 | seek(time){
120 | super.seek();
121 | let _this = this;
122 |
123 | let seekVideo = function(){
124 | if (_this.element.readyState > 3){
125 | _this.ready = true;
126 | if ((time - _this.start) < 0 || time >(_this.start+_this.duration)){
127 | _this.element.currentTime = _this.sourceStart;
128 | } else {
129 | _this.element.currentTime = (time - _this.start) + _this.sourceStart;
130 | }
131 | } else {
132 | //If the element isn't ready to seek create a one-time event which seeks the element once it is ready.
133 | console.debug("Can't seek video due to readyState");
134 | _this.ready = false;
135 | eventOneTime(_this.element, "canplay", seekVideo);
136 | }
137 | };
138 |
139 | seekVideo();
140 | }
141 | /**
142 | * Pause the VideoSource if it is playing.
143 | */
144 | pause(){
145 | super.pause();
146 | this.element.pause();
147 | }
148 | /**
149 | * Set the VideoSource loading, when it's ready isReady() will return true.
150 | */
151 | load(){
152 | //check if we're using an already instatiated element, if so don't do anything.
153 |
154 | if (super.load()){
155 | //this.element.currentTime = this.sourceStart;
156 | this.seek(0);
157 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
158 | this.ready = true;
159 | this.width = this.element.videoWidth;
160 | this.height = this.element.videoHeight;
161 | this.onready(this);
162 | return;
163 | }
164 | //otherwise begin the loading process for this mediaSource
165 | this.element = document.createElement('video');
166 | //construct a fragement URL to cut the required segment from the source video
167 | this.element.src = this.src;
168 | this.element.volume = this._volume;
169 | this.element.preload = "auto";
170 | this.element.load();
171 | let _this = this;
172 | this.element.addEventListener('loadeddata', function() {
173 | _this.element.currentTime = _this.sourceStart;
174 | _this.seek(0);
175 | _this.gl.texImage2D(_this.gl.TEXTURE_2D, 0, _this.gl.RGBA, _this.gl.RGBA, _this.gl.UNSIGNED_BYTE, _this.element);
176 | _this.ready = true;
177 | _this.width = _this.element.videoWidth;
178 | _this.height = _this.element.videoHeight;
179 | _this.onready(_this);
180 | }, false);
181 | /*this.element.addEventListener('seeked', function(){
182 | console.log("SEEKED");
183 | _this.ready = true;
184 | _this.onready(_this);
185 | })*/
186 |
187 |
188 | }
189 | /**
190 | * Render the VideoSource to the WebGL context passed into the constructor.
191 | */
192 | render(program, renderParameters, textures){
193 | this.element.playbackRate = renderParameters["playback_rate"];
194 | super.render(program, renderParameters, textures);
195 | }
196 | /**
197 | * Clean up the VideoSource for detruction.
198 | */
199 | destroy(){
200 | this.element.pause();
201 | if (this.disposeOfElementOnDestroy){
202 | this.element.src = "";
203 | this.element.removeAttribute("src");
204 | }
205 | super.destroy();
206 | }
207 | }
208 |
209 | export default VideoSource;
210 |
211 |
Index | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | Identifier
54 |
Class Summary
55 | Static Public Class Summary
57 |
58 |
59 |
60 | public
61 |
62 |
63 |
64 |
66 |
67 |
72 |
73 |
74 |
75 |
76 |
77 |
78 |
79 |
80 |
81 |
82 |
83 |
84 |
85 | public
86 |
87 |
88 |
89 |
91 |
92 |
97 |
98 |
99 |
100 |
101 |
102 |
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Variable Summary
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14 | @ratio@
15 | @ratio@
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18 |
--------------------------------------------------------------------------------
/doc/image/github.png:
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https://raw.githubusercontent.com/bbc/html5-video-compositor/6dcffdf315e3a6aaa4fff5526c164676a307742b/doc/image/github.png
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/doc/image/search.png:
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https://raw.githubusercontent.com/bbc/html5-video-compositor/6dcffdf315e3a6aaa4fff5526c164676a307742b/doc/image/search.png
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/doc/index.html:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | HTML5-Video-Compositor
54 |
A shader based video composition engine for the browser.
55 |
<!DOCTYPE html>
56 | <html>
57 | <head></head>
58 | <body>
59 | <script type="text/javascript" src="videocompositor.js"></script>
60 | <script type="text/javascript">
61 | window.onload = function () {
62 | var canvas = document.getElementById('player-canvas');
63 | var videoCompositor = new VideoCompositor(canvas);
64 |
65 | videoCompositor.playlist = {
66 | "tracks":[
67 | [{type:"video", sourceStart:0, start:0, duration:5, src:"video1.mp4", id:"1"}, {type:"video", sourceStart:0, start:7.5, duration:5, src:"video2.mp4", id:"3"}],
68 | [ {type:"image", start:2.5, duration:5, src:"image.png", id:"2"}]
69 | ]
70 | };
71 |
72 | videoCompositor.play();
73 | };
74 | </script>
75 | <canvas id="player-canvas"></canvas>
76 | </body>
77 | </html>
78 |
79 |
Introduction
80 |
This is an experimental video composition engine which can play edit decision lists in the browser. Content can be dynamically appended to the EDL as it's playing to create interactive and responsive content.
81 |
In video editing terms an EDL defines the points at which to cut and assemble video sources. VideoCompositor uses a simple JSON based EDL to describe how to cut and assemble HTML5 video sources, images, and WebGL contexts, it also provides a framework for performing shader based compositing operations (i.e cross-fades, green-screen).
82 |
Limitations
83 |
84 | Effects are limited to one shader per track ... stay tuned for updates on this.
85 | (Probably) won't work on mobile.
86 | Cant' change the properties of MediaSourceReferences dynamically.
87 | Videos must be encoded correctly.
88 |
89 |
Video Encoding
90 |
You will probably only see acceptable video performance if you encode videos with some kind of "fast decode" option. Using the avconv tool this can be done with the following command.
91 |
avconv -i input.mp4 -tune fastdecode -strict experimental output.mp4
92 |
93 |
Documentation
94 |
The tutorial.md file in the tutorial directory of the project gives a walk-through of using the library to sequence clips and perform simple effects.
95 |
API documentation is available in the /doc directory of the project.
96 |
Notes about usage, behaviors, and other miscellaneous information is available on the Wiki .
97 |
Build
98 |
This project uses npm to manage dependencies. To build the compositor, in the root of the project run:
99 |
npm install
100 |
101 |
Once this has completed you can build the source files by running (this will build a commonjs2 and a vanilla js file):
102 |
npm run build
103 |
104 |
To auto-recompile the project on source change run (this will only rebuild the vanilla js file):
105 |
npm run dev
106 |
107 |
108 |
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35 | }
36 | }
37 |
38 | var innerHTML = '';
39 | for (kind in html) {
40 | var list = html[kind];
41 | if (!list.length) continue;
42 | innerHTML += '' + kind + ' \n' + list.join('\n');
43 | }
44 | result.innerHTML = innerHTML;
45 | if (innerHTML) result.style.display = 'block';
46 | selectedIndex = -1;
47 | });
48 |
49 | // down, up and enter key are pressed, select search result.
50 | input.addEventListener('keydown', function(ev){
51 | if (ev.keyCode === 40) {
52 | // arrow down
53 | var current = result.children[selectedIndex];
54 | var selected = result.children[selectedIndex + 1];
55 | if (selected && selected.classList.contains('search-separator')) {
56 | var selected = result.children[selectedIndex + 2];
57 | selectedIndex++;
58 | }
59 |
60 | if (selected) {
61 | if (current) current.classList.remove('selected');
62 | selectedIndex++;
63 | selected.classList.add('selected');
64 | }
65 | } else if (ev.keyCode === 38) {
66 | // arrow up
67 | var current = result.children[selectedIndex];
68 | var selected = result.children[selectedIndex - 1];
69 | if (selected && selected.classList.contains('search-separator')) {
70 | var selected = result.children[selectedIndex - 2];
71 | selectedIndex--;
72 | }
73 |
74 | if (selected) {
75 | if (current) current.classList.remove('selected');
76 | selectedIndex--;
77 | selected.classList.add('selected');
78 | }
79 | } else if (ev.keyCode === 13) {
80 | // enter
81 | var current = result.children[selectedIndex];
82 | if (current) {
83 | var link = current.querySelector('a');
84 | if (link) location.href = link.href;
85 | }
86 | } else {
87 | return;
88 | }
89 |
90 | ev.preventDefault();
91 | });
92 |
93 | // select search result when search result is mouse over.
94 | result.addEventListener('mousemove', function(ev){
95 | var current = result.children[selectedIndex];
96 | if (current) current.classList.remove('selected');
97 |
98 | var li = ev.target;
99 | while (li) {
100 | if (li.nodeName === 'LI') break;
101 | li = li.parentElement;
102 | }
103 |
104 | if (li) {
105 | selectedIndex = Array.prototype.indexOf.call(result.children, li);
106 | li.classList.add('selected');
107 | }
108 | });
109 |
110 | // clear search result when body is clicked.
111 | document.body.addEventListener('click', function(ev){
112 | selectedIndex = -1;
113 | result.style.display = 'none';
114 | result.innerHTML = '';
115 | });
116 |
117 | })();
118 |
--------------------------------------------------------------------------------
/doc/script/test-summary.js:
--------------------------------------------------------------------------------
1 | (function(){
2 | function toggle(ev) {
3 | var button = ev.target;
4 | var parent = ev.target.parentElement;
5 | while(parent) {
6 | if (parent.tagName === 'TR' && parent.classList.contains('test-describe')) break;
7 | parent = parent.parentElement;
8 | }
9 |
10 | if (!parent) return;
11 |
12 | var direction;
13 | if (button.classList.contains('opened')) {
14 | button.classList.remove('opened');
15 | button.classList.add('closed');
16 | direction = 'closed';
17 | } else {
18 | button.classList.remove('closed');
19 | button.classList.add('opened');
20 | direction = 'opened';
21 | }
22 |
23 | var targetDepth = parseInt(parent.dataset.testDepth, 10) + 1;
24 | var nextElement = parent.nextElementSibling;
25 | while (nextElement) {
26 | var depth = parseInt(nextElement.dataset.testDepth, 10);
27 | if (depth >= targetDepth) {
28 | if (direction === 'opened') {
29 | if (depth === targetDepth) nextElement.style.display = '';
30 | } else if (direction === 'closed') {
31 | nextElement.style.display = 'none';
32 | var innerButton = nextElement.querySelector('.toggle');
33 | if (innerButton && innerButton.classList.contains('opened')) {
34 | innerButton.classList.remove('opened');
35 | innerButton.classList.add('closed');
36 | }
37 | }
38 | } else {
39 | break;
40 | }
41 | nextElement = nextElement.nextElementSibling;
42 | }
43 | }
44 |
45 | var buttons = document.querySelectorAll('.test-summary tr.test-describe .toggle');
46 | for (var i = 0; i < buttons.length; i++) {
47 | buttons[i].addEventListener('click', toggle);
48 | }
49 |
50 | var topDescribes = document.querySelectorAll('.test-summary tr[data-test-depth="0"]');
51 | for (var i = 0; i < topDescribes.length; i++) {
52 | topDescribes[i].style.display = '';
53 | }
54 | })();
55 |
--------------------------------------------------------------------------------
/doc/source.html:
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1 |
2 |
3 |
4 | Source | HTML5 Video Compositor API Document
7 |
51 |
52 |
53 | Source 47/123
54 |
55 |
142 |
Progress Bar Example
5 |
6 |
63 |
64 |
65 |
67 |
69 |
70 | Play
71 | Pause
72 |
73 |
74 |
--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
1 | {
2 | "name": "html5-video-compositor",
3 | "version": " 0.9.3",
4 | "description": "A HTML5 based video composition engine",
5 | "keywords": [
6 | "html5",
7 | "video",
8 | "video composition",
9 | "webgl"
10 | ],
11 | "bugs": {
12 | "url": "https://github.com/bbc/html5-video-compositor/issues"
13 | },
14 | "license": {
15 | "license": "Apache-2.0"
16 | },
17 | "browser": "./src/main.js",
18 | "repository": {
19 | "type": "git",
20 | "url": "https://github.com/bbc/html5-video-compositor"
21 | },
22 | "contributors": [
23 | {
24 | "name": "Matthew Shotton",
25 | "email": "matthew.shotton@bbc.co.uk"
26 | },
27 | {
28 | "name": "Max Leonard",
29 | "email": "max.leonard@bbc.co.uk"
30 | }
31 | ],
32 | "scripts": {
33 | "build_all": "node ./node_modules/webpack/bin/webpack.js --optimize-minimize --config webpack.config.js && node ./node_modules/webpack/bin/webpack.js --config webpack.commonjs2.config.js && node ./node_modules/esdoc/out/src/ESDocCLI.js -c esdoc.json",
34 | "doc": "node ./node_modules/esdoc/out/src/ESDocCLI.js -c esdoc.json",
35 | "build": "node ./node_modules/webpack/bin/webpack.js --optimize-minimize --config webpack.config.js && node ./node_modules/webpack/bin/webpack.js --config webpack.commonjs2.config.js",
36 | "dev": "node ./node_modules/webpack/bin/webpack.js --watch --config webpack.config.js & ./node_modules/http-server/bin/http-server"
37 | },
38 | "dependencies": {},
39 | "browserDependencies": {},
40 | "devDependencies": {
41 | "babel-core": "^5.6.5",
42 | "babel-loader": "^5.1.4",
43 | "esdoc": "^0.3.1",
44 | "http-server": "^0.9.0",
45 | "node-libs-browser": "^0.5.2",
46 | "webpack": "^1.9.11"
47 | }
48 | }
49 |
--------------------------------------------------------------------------------
/src/audiomanager.js:
--------------------------------------------------------------------------------
1 |
2 |
3 | function isIdInTrack(id, track){
4 | for (let i = 0; i < track.length; i++) {
5 | if (track[i].id === id){
6 | return true;
7 | }
8 | }
9 | return false;
10 | }
11 |
12 | function getTrackIndexsForId(id, tracks){
13 | let trackIndexs = [];
14 | for (let i = 0; i < tracks.length; i++) {
15 | let track = tracks[i];
16 | if (isIdInTrack(id, track)){
17 | trackIndexs.push(i);
18 | }
19 | }
20 | return trackIndexs;
21 | }
22 |
23 |
24 | class AudioManager {
25 | constructor(audioCtx){
26 | this.audioCtx = audioCtx;
27 | this.tracks = [];
28 | this.audioNodes = new Map();
29 | this.audioOutputNodes = [];
30 | }
31 |
32 | createAudioNodeFromTrack(track){
33 | if (this.audioCtx === undefined){
34 | // There can only be a max of 6 AudioContexts in most browsers, so only instantiate it here rather than in
35 | // constructor as it's genuinley needed. Otherwise having >6 VideoCompositor instances running will break
36 | // the browser.
37 | this.audioCtx = new AudioContext();
38 | }
39 | this.tracks.push(track);
40 | let trackBus = this.audioCtx.createGain();
41 | this.audioOutputNodes.push(trackBus);
42 | return trackBus;
43 | }
44 |
45 | getAudioContext(){
46 | if (this.audioCtx === undefined){
47 | // There can only be a max of 6 AudioContexts in most browsers, so only instantiate it here rather than in
48 | // constructor as it's genuinley needed. Otherwise having >6 VideoCompositor instances running will break
49 | // the browser.
50 | this.audioCtx = new AudioContext();
51 | }
52 | return this.audioCtx;
53 | }
54 |
55 | removeFromCacheById(id){
56 | let node = this.audioNodes.get(id);
57 | node.disconnect();
58 | this.audioNodes.delete(id);
59 | }
60 |
61 | clearAudioNodeCache(){
62 | for (let id of this.audioNodes.keys()){
63 | this.removeFromCacheById(id);
64 | }
65 | }
66 |
67 | update(mediaSources, currentlyPlaying){
68 | let currentlyPlayingIds = [];
69 | for (let i = 0; i < currentlyPlaying.length; i++) {
70 | let mediaSourceRef = currentlyPlaying[i];
71 | currentlyPlayingIds.push(mediaSourceRef.id);
72 | }
73 |
74 | if (mediaSources === undefined) return;
75 | for (let id of mediaSources.keys()) {
76 | let mediaSource = mediaSources.get(id);
77 | let trackIndexs = getTrackIndexsForId(id, this.tracks);
78 | if (trackIndexs.length ===0){
79 | continue; //No mappings for this id
80 | }
81 | if (!this.audioNodes.has(id)){
82 | //if an AudioNode for this id does not exist, create it.
83 | let audioNode;
84 | try{
85 | audioNode = this.audioCtx.createMediaElementSource(mediaSource.element);
86 | } catch (err) {
87 | continue;
88 | }
89 |
90 | this.audioNodes.set(id, audioNode);
91 | //make the connections from the audio node to the appropriate output tracks
92 | for (let i = 0; i < trackIndexs.length; i++) {
93 | let trackIndex = trackIndexs[i];
94 | audioNode.connect(this.audioOutputNodes[trackIndex]);
95 | }
96 | }else {
97 | }
98 | }
99 | //TODO add test to make sure all id's for audio nodes stored in this.audioNodes exist in the current mediaSources, otherwise delete them.
100 | }
101 | }
102 | export default AudioManager;
103 |
104 |
--------------------------------------------------------------------------------
/src/effect.js:
--------------------------------------------------------------------------------
1 | function refreshTextures(playlistEffectObject, textures, gl){
2 | let textureOffset = 1;
3 |
4 | if (playlistEffectObject.parameters === undefined) return;
5 |
6 | let parameterKeys = Object.keys(playlistEffectObject.parameters);
7 | for (let i = 0; i < parameterKeys.length; i++) {
8 | let key = parameterKeys[i];
9 | let parameter = playlistEffectObject.parameters[key];
10 | if (typeof parameter !== "number"){
11 | let texture = textures[textureOffset-1];
12 | gl.activeTexture(gl.TEXTURE0 + textureOffset);
13 | gl.bindTexture(gl.TEXTURE_2D, texture);
14 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
15 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
16 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
17 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
18 | gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, parameter);
19 | textureOffset += 1;
20 | }
21 | }
22 | }
23 |
24 | function loadTextures(playlistEffectObject, gl){
25 | if (playlistEffectObject.parameters === undefined) return [];
26 | let parameterKeys = Object.keys(playlistEffectObject.parameters);
27 | let textures = [];
28 | for (let i = 0; i < parameterKeys.length; i++) {
29 | let key = parameterKeys[i];
30 | let parameter = playlistEffectObject.parameters[key];
31 | if (typeof parameter !== "number"){
32 | let texture = gl.createTexture();
33 | textures.push(texture);
34 | }
35 | }
36 | refreshTextures(playlistEffectObject, textures, gl);
37 | return textures;
38 | }
39 |
40 |
41 | function compileShader(gl, shaderSource, shaderType) {
42 | let shader = gl.createShader(shaderType);
43 | gl.shaderSource(shader, shaderSource);
44 | gl.compileShader(shader);
45 | let success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
46 | if (!success) {
47 | throw "could not compile shader:" + gl.getShaderInfoLog(shader);
48 | }
49 | return shader;
50 | }
51 |
52 |
53 | function createShaderProgram(gl, vertexShaderSource, fragmentShaderSource){
54 | let vertexShader = compileShader(gl, vertexShaderSource, gl.VERTEX_SHADER);
55 | let fragmentShader = compileShader(gl, fragmentShaderSource, gl.FRAGMENT_SHADER);
56 | let program = gl.createProgram();
57 |
58 | gl.attachShader(program, vertexShader);
59 | gl.attachShader(program, fragmentShader);
60 | gl.linkProgram(program);
61 |
62 | if (!gl.getProgramParameter(program, gl.LINK_STATUS)){
63 | throw {"error":4,"msg":"Can't link shader program for track", toString:function(){return this.msg;}};
64 | }
65 | return program;
66 | }
67 |
68 |
69 | class Effect {
70 | constructor(playlistEffectObject, gl){
71 | this.gl = gl;
72 | this.vertexShaderSrc = playlistEffectObject.effect.vertexShader;
73 | if (this.vertexShaderSrc === undefined){
74 | this.vertexShaderSrc = "\
75 | uniform float progress;\
76 | uniform float duration;\
77 | uniform vec2 source_resolution;\
78 | uniform vec2 output_resolution;\
79 | attribute vec2 a_position;\
80 | attribute vec2 a_texCoord;\
81 | varying vec2 v_texCoord;\
82 | varying float v_progress;\
83 | varying float v_duration;\
84 | varying vec2 v_source_resolution;\
85 | varying vec2 v_output_resolution;\
86 | void main() {\
87 | v_progress = progress;\
88 | v_duration = duration;\
89 | v_source_resolution = source_resolution;\
90 | v_output_resolution = output_resolution;\
91 | gl_Position = vec4(vec2(2.0,2.0)*a_position-vec2(1.0, 1.0), 0.0, 1.0);\
92 | v_texCoord = a_texCoord;\
93 | }";
94 | }
95 | this.fragmentShaderSrc = playlistEffectObject.effect.fragmentShader;
96 | if (this.fragmentShaderSrc === undefined){
97 | this.fragmentShaderSrc = "\
98 | precision mediump float;\
99 | uniform sampler2D u_image;\
100 | varying vec2 v_texCoord;\
101 | varying float v_progress;\
102 | varying float v_duration;\
103 | varying vec2 v_source_resolution;\
104 | varying vec2 v_output_resolution;\
105 | void main(){\
106 | gl_FragColor = texture2D(u_image, v_texCoord);\
107 | }";
108 | }
109 |
110 | this.parameters = playlistEffectObject.parameters;
111 | if (this.parameters === undefined){
112 | this.parameters = {};
113 | }
114 | if (playlistEffectObject.effect.defaultParameters !== undefined){
115 | for (let key in playlistEffectObject.effect.defaultParameters) {
116 | if (this.parameters[key]===undefined){
117 | this.parameters[key] = playlistEffectObject.effect.defaultParameters[key];
118 | }
119 | }
120 | }
121 | this.inputs = playlistEffectObject.inputs;
122 | if (this.inputs === undefined){
123 | this.inputs = [];
124 | }
125 |
126 | this.textures = loadTextures(playlistEffectObject, this.gl);
127 | this.program = createShaderProgram(this.gl, this.vertexShaderSrc, this.fragmentShaderSrc);
128 | }
129 |
130 |
131 | update(playlistEffectObject){
132 | refreshTextures(playlistEffectObject, this.textures, this.gl);
133 | this.inputs = playlistEffectObject.inputs;
134 | if (this.inputs === undefined){
135 | this.inputs = [];
136 | }
137 | }
138 |
139 | }
140 |
141 | export default Effect;
--------------------------------------------------------------------------------
/src/effectmanager.js:
--------------------------------------------------------------------------------
1 | import Effect from "./effect.js";
2 |
3 | class EffectManager {
4 | constructor(gl){
5 | this.effects = new Map();
6 | this.gl = gl;
7 | //Setup the default effect
8 | this.newEffect("default",{"effect":{}});
9 | }
10 |
11 | newEffect(id, playlistEffectObject){
12 | //The playlist effect object is the representation of the effect stored in the playlist object
13 | let effect = new Effect(playlistEffectObject, this.gl);
14 | this.effects.set(id, effect);
15 | }
16 |
17 | updateEffects(playlistEffectObjects){
18 | if (playlistEffectObjects === undefined) return;
19 | for (let key in playlistEffectObjects){
20 | if (this.effects.has(key)){
21 | //udpate the effect
22 | this.effects.get(key).update(playlistEffectObjects[key]);
23 | } else {
24 | //create the effect
25 | this.newEffect(key, playlistEffectObjects[key]);
26 | }
27 | }
28 | //TODO clean-up effects that don't exist
29 | }
30 |
31 | getEffectForInputId(inputId){
32 | let effectIdList = this.effects.keys();
33 | for (let key of effectIdList) {
34 | var effect = this.effects.get(key);
35 | if (effect.inputs.indexOf(inputId) > -1){
36 | return effect;
37 | }
38 | }
39 | return this.effects.get("default");
40 | }
41 | }
42 |
43 | export default EffectManager;
44 |
--------------------------------------------------------------------------------
/src/sources/canvassource.js:
--------------------------------------------------------------------------------
1 | //Matthew Shotton, R&D User Experince,© BBC 2015
2 | import MediaSource from "./mediasource";
3 |
4 | class CanvasSource extends MediaSource{
5 | /**
6 | * Canvas playback source. Inherits from MediaSource
7 | *
8 | * A CanvasSource is the manifestation of a mediaSourceReference from a playlist object which has type "canvas".
9 | *
10 | * A CanvasSource exists for a period slightly before a CanvasSource is to play in order to give it time to preload and
11 | * is destroyed as soon as the CanvasSource has finished playing.
12 | *
13 | * @param {Object} properties - An object with the following attributes: id, duration, start, and element.
14 | * Where src is the URL of a video, or element is a DOM Video element.
15 | *
16 | * @param {WebGLContext} gl - a webGl context to render too.
17 | */
18 | constructor(properties, gl){
19 | super(properties, gl);
20 | this.width = properties.width;
21 | this.height = properties.height;
22 | }
23 | /**
24 | * Set the CanvasSource playing.
25 | */
26 | play(){
27 | super.play();
28 | }
29 | /**
30 | * Seek to playlist time and do something appropriate with this CavnasSource. This can effect shaders applied to this
31 | * canvas and any MediaSourceListeners listening to the Id of this source.
32 | * @param {number} seekTime - The time to seek too, this is the overall time for the whole playlist.
33 | */
34 | seek(time){
35 | super.seek(time);
36 | }
37 | /**
38 | * Pause the CanvasSource if it is playing.
39 | */
40 | pause(){
41 | super.pause();
42 | }
43 | /**
44 | * Set the CanvasSource loading, when it's ready isReady() will return true.
45 | */
46 | load(){
47 | //check if we're using an already instatiated element, if so don't do anything.
48 | if (super.load()){
49 | this.seek(0);
50 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
51 | this.ready = true;
52 | this.width = this.element.width;
53 | this.height = this.element.height;
54 | this.onready(this);
55 | return;
56 | }
57 |
58 |
59 | //otherwise begin the loading process for this mediaSource
60 | this.element = document.createElement("canvas");
61 | this.element.width = this.width;
62 | this.element.height = this.height;
63 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
64 | this.ready = true;
65 | this.onready(this);
66 | }
67 | render(program, renderParameters, textures){
68 | super.render(program, renderParameters, textures);
69 | }
70 | }
71 |
72 | export default CanvasSource;
--------------------------------------------------------------------------------
/src/sources/imagesource.js:
--------------------------------------------------------------------------------
1 | //Matthew Shotton, R&D User Experince,© BBC 2015
2 | import MediaSource from "./mediasource";
3 |
4 | class ImageSource extends MediaSource{
5 | /**
6 | * Image playback source. Inherits from MediaSource
7 | *
8 | * A ImageSource is the manifestation of a mediaSourceReference from a playlist object which has type "image".
9 | *
10 | * A ImageSource exists for a period slightly before a ImageSource is to play in order to give it time to preload and
11 | * is destroyed as soon as the ImageSource has finished playing.
12 | *
13 | * @param {Object} properties - An object with the following attributes: id, duration, start, and src or element.
14 | * Where src is the URL of a video, or element is a DOM Video element.
15 | *
16 | * @param {WebGLContext} gl - a webGl context to render too.
17 | */
18 | constructor(properties, gl){
19 | super(properties, gl);
20 | }
21 | /**
22 | * Set the ImageSource playing.
23 | */
24 | play(){
25 | super.play();
26 | }
27 | /**
28 | * Seek to playlist time and do something appropriate with this ImageSource. This has little effect on the image as it's
29 | * static but can affect any effect shaders applied to this image and any MediaSourceListeners listening to the Id of
30 | * this source.
31 | * @param {number} seekTime - The time to seek too, this is the overall time for the whole playlist.
32 | */
33 | seek(time){
34 | super.seek(time);
35 | }
36 | /**
37 | * Pause the ImageSource if it is playing.
38 | */
39 | pause(){
40 | super.pause();
41 | }
42 | /**
43 | * Set the ImageSource loading, when it's ready isReady() will return true.
44 | */
45 | load(){
46 | //check if we're using an already instatiated element, if so don't do anything.
47 | if (super.load()){
48 | this.seek(0);
49 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
50 | this.ready = true;
51 | // Upload the image into the texture.
52 | this.width = this.element.width;
53 | this.height = this.element.height;
54 | this.onready(this);
55 | return;
56 | }
57 |
58 | //otherwise begin the loading process for this mediaSource
59 | this.element = new Image();
60 | let _this = this;
61 | this.element.onload = function(){
62 | _this.gl.texImage2D(_this.gl.TEXTURE_2D, 0, _this.gl.RGBA, _this.gl.RGBA, _this.gl.UNSIGNED_BYTE, _this.element);
63 | _this.ready = true;
64 | _this.onready(_this);
65 | _this.width = _this.element.width;
66 | _this.height = _this.element.height;
67 | };
68 | this.element.src = this.src;
69 | }
70 | render(program, renderParameters, textures){
71 | super.render(program, renderParameters, textures);
72 | }
73 | }
74 |
75 | export default ImageSource;
--------------------------------------------------------------------------------
/src/sources/mediasource.js:
--------------------------------------------------------------------------------
1 | //Matthew Shotton, R&D User Experince,© BBC 2015
2 |
3 | class MediaSource {
4 | /**
5 | * Parent class of all MediaSources
6 | *
7 | * A MediaSource is the manifestation of a mediaSourceReference from a playlist object. It typically contains the
8 | * original DOM element to be composited along with a number of functions to load, play, pause, seek and render that
9 | * element to the webgl context.
10 | *
11 | * A MediaSource exists for a period slightly before a MediaSource is to play in order to give it time to preload and
12 | * is destroyed as soon as the MediaSource has finished playing.
13 | *
14 | * @param {Object} properties - An object with the following attributes: id, duration, start, and src or element.
15 | * Where src is the URL of something that can be used to create a DOM element that can be rendered to canvas, or
16 | * element is a DOM element that can be rendered to a canvas.
17 | *
18 | * @param {WebGLContext} gl - a webGl context to render too.
19 | */
20 | constructor(properties, gl){
21 | this.gl = gl;
22 | this.id = properties.id;
23 | this.duration = properties.duration;
24 | this.start = properties.start;
25 | this.playing = false;
26 | this.ready = false;
27 | this.element = undefined;
28 | this.src = undefined;
29 | this.texture = undefined;
30 | this.width = undefined;
31 | this.height = undefined;
32 | this.mediaSourceListeners = [];
33 |
34 | this.disposeOfElementOnDestroy = false;
35 |
36 | //If the mediaSource is created from a src string then it must be resonsible for cleaning itself up.
37 | if (properties.src !== undefined){
38 | this.disposeOfElementOnDestroy = true;
39 | this.src = properties.src;
40 | }else {
41 | //If the MediaSource is created from an element then it should not clean the element up on destruction as it may be used elsewhere.
42 | this.disposeOfElementOnDestroy = false;
43 | this.element = properties.element;
44 | }
45 |
46 |
47 | /*let positionLocation = gl.getAttribLocation(program, "a_position");
48 | let texCoordLocation = gl.getAttribLocation(program, "a_texCoord");*/
49 |
50 | //Hard Code these for now, but this is baaaaaad
51 | let positionLocation = 0;
52 | let texCoordLocation = 1;
53 |
54 | gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
55 | gl.enable ( gl.BLEND) ;
56 | // Create a texture.
57 | this.texture = gl.createTexture();
58 | gl.bindTexture(gl.TEXTURE_2D, this.texture);
59 | gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);
60 | // Set the parameters so we can render any size image.
61 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
62 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
63 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
64 | gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
65 |
66 |
67 | let buffer = gl.createBuffer();
68 | gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
69 | gl.enableVertexAttribArray(positionLocation);
70 | gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
71 |
72 | gl.bufferData(
73 | gl.ARRAY_BUFFER,
74 | /*new Float32Array([
75 | 1.0, 1.0,
76 | -1.0, 1.0,
77 | 1.0, -1.0,
78 | 1.0, -1.0,
79 | -1.0, 1.0,
80 | -1.0, -1.0]),*/
81 | new Float32Array([
82 | 1.0, 1.0,
83 | 0.0, 1.0,
84 | 1.0, 0.0,
85 | 1.0, 0.0,
86 | 0.0, 1.0,
87 | 0.0, 0.0]),
88 | gl.STATIC_DRAW);
89 | gl.enableVertexAttribArray(texCoordLocation);
90 | gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0);
91 |
92 | }
93 |
94 | /**
95 | * Set the MediaSource playing.
96 | */
97 | play(){
98 | //console.log("Playing", this.id);
99 | if (this.playing === false){
100 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
101 | if(typeof this.mediaSourceListeners[i].play === 'function')this.mediaSourceListeners[i].play(this);
102 | }
103 | }
104 | this.playing = true;
105 | }
106 | /**
107 | * Pause the MediaSource if it is playing.
108 | */
109 | pause(){
110 | console.debug("Pausing", this.id);
111 | this.playing = false;
112 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
113 | if(typeof this.mediaSourceListeners[i].pause === 'function')this.mediaSourceListeners[i].pause(this);
114 | }
115 | }
116 | /**
117 | * Seek the MediaSource to an appropriate point for the passed time.
118 | * @param {number} seekTime - The time to seek too, this is the overall time for the whole playlist.
119 | */
120 | seek(seekTime){
121 | //this.currentTime = seekTime;
122 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
123 | if(typeof this.mediaSourceListeners[i].seek === 'function')this.mediaSourceListeners[i].seek(this, seekTime);
124 | }
125 | }
126 | /**
127 | * Check if the MediaSource is ready to start playing.
128 | */
129 | isReady(){
130 | let listenerReady = true;
131 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
132 | if(typeof this.mediaSourceListeners[i].isReady === 'function'){
133 | if (this.mediaSourceListeners[i].isReady(this) === false){
134 | listenerReady = false;
135 | }
136 | }
137 | }
138 | if (listenerReady === true && this.ready === true) return true;
139 | return false;
140 | }
141 | /**
142 | * Set the MediaSource loading, when it's ready isReady() will return true.
143 | */
144 | load(){
145 | console.debug("Loading", this.id);
146 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
147 | if(typeof this.mediaSourceListeners[i].load === 'function')this.mediaSourceListeners[i].load(this);
148 | }
149 | if (this.element !== undefined) {
150 | return true;
151 | }
152 | return false;
153 | }
154 | /**
155 | * Clean up the MediaSource for detruction.
156 | */
157 | destroy(){
158 | console.debug("Destroying", this.id);
159 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
160 | if (typeof this.mediaSourceListeners[i].destroy === 'function') this.mediaSourceListeners[i].destroy(this);
161 | }
162 | if (this.disposeOfElementOnDestroy){
163 | delete this.element;
164 | }
165 | }
166 | /**
167 | * Render the MediaSource to the WebGL context passed into the constructor.
168 | */
169 | render(program, renderParameters, textures){
170 | //renders the media source to the WebGL context using the pased program
171 | let overriddenElement;
172 | for (let i = 0; i < this.mediaSourceListeners.length; i++) {
173 | if (typeof this.mediaSourceListeners[i].render === 'function'){
174 | let result = this.mediaSourceListeners[i].render(this, renderParameters);
175 | if (result !== undefined) overriddenElement = result;
176 | }
177 | }
178 |
179 | this.gl.useProgram(program);
180 | let renderParametersKeys = Object.keys(renderParameters);
181 | let textureOffset = 1;
182 | for (let index in renderParametersKeys){
183 | let key = renderParametersKeys[index];
184 | let parameterLoctation = this.gl.getUniformLocation(program, key);
185 | if (parameterLoctation !== -1){
186 | if (typeof renderParameters[key] === "number"){
187 | this.gl.uniform1f(parameterLoctation, renderParameters[key]);
188 | }
189 | else if( Object.prototype.toString.call(renderParameters[key]) === '[object Array]'){
190 | let array = renderParameters[key];
191 | if(array.length === 1){
192 | this.gl.uniform1fv(parameterLoctation, array);
193 | } else if(array.length === 2){
194 | this.gl.uniform2fv(parameterLoctation, array);
195 | } else if(array.length === 3){
196 | this.gl.uniform3fv(parameterLoctation, array);
197 | } else if(array.length === 4){
198 | this.gl.uniform4fv(parameterLoctation, array);
199 | } else{
200 | console.debug("Shader parameter", key, "is too long and array:", array);
201 | }
202 | }
203 | else{
204 | //Is a texture
205 | this.gl.activeTexture(this.gl.TEXTURE0 + textureOffset);
206 | this.gl.uniform1i(parameterLoctation, textureOffset);
207 | this.gl.bindTexture(this.gl.TEXTURE_2D, textures[textureOffset-1]);
208 | }
209 | }
210 | }
211 |
212 | this.gl.activeTexture(this.gl.TEXTURE0);
213 | let textureLocation = this.gl.getUniformLocation(program, "u_image");
214 | this.gl.uniform1i(textureLocation, 0);
215 | this.gl.bindTexture(this.gl.TEXTURE_2D, this.texture);
216 | if (overriddenElement !== undefined){
217 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, overriddenElement);
218 | } else {
219 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
220 | }
221 | this.gl.drawArrays(this.gl.TRIANGLES, 0, 6);
222 | }
223 | onready(mediaSource){
224 | }
225 | }
226 |
227 | export default MediaSource;
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/src/sources/videosource.js:
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1 | //Matthew Shotton, R&D User Experince,© BBC 2015
2 | import MediaSource from "./mediasource";
3 |
4 |
5 | function eventOneTime(element, type, callback){
6 | let handleEvent = function(e){
7 | e.target.removeEventListener(e.type, handleEvent);
8 | return callback(e);
9 | };
10 |
11 | element.addEventListener(type, handleEvent, false);
12 | }
13 |
14 |
15 |
16 | class VideoSource extends MediaSource{
17 | /**
18 | * Video playback source. Inherits from MediaSource
19 | *
20 | * A VideoSource is the manifestation of a mediaSourceReference from a playlist object which has type "video".
21 | *
22 | * A VideoSource exists for a period slightly before a VideoSource is to play in order to give it time to preload and
23 | * is destroyed as soon as the VideoSource has finished playing. You can define an offset into the original video to
24 | * start playing by passing in a sourceStart value in the properties.
25 | *
26 | * @param {Object} properties - An object with the following attributes: id, duration, start, sourceStart, and src or element.
27 | * Where src is the URL of a video, or element is a DOM Video element.
28 | *
29 | * @param {WebGLContext} gl - a webGl context to render too.
30 | */
31 | constructor(properties, gl){
32 | super(properties, gl);
33 | this.sourceStart = 0;
34 | this._volume = 1.0;
35 | if (properties.sourceStart !== undefined){
36 | this.sourceStart = properties.sourceStart;
37 | }
38 | if (properties.volume !== undefined){
39 | this._volume = properties.volume;
40 | }
41 | }
42 | /**
43 | * Set the VideoSource playing.
44 | */
45 | play(){
46 | super.play();
47 | let _this = this;
48 |
49 | let playVideo = function(){
50 | if (_this.element.readyState > 3){
51 | _this.ready = true;
52 | _this.element.play();
53 | } else {
54 | console.debug("Can't play video due to readyState");
55 | _this.ready = false;
56 | eventOneTime(_this.element, "canplay", playVideo);
57 | }
58 | };
59 |
60 | playVideo();
61 | }
62 | /**
63 | * Seek the VideoSource to an appropriate point for the passed time.
64 | * @param {number} seekTime - The time to seek too, this is the overall time for the whole playlist.
65 | */
66 | seek(time){
67 | super.seek();
68 | let _this = this;
69 |
70 | let seekVideo = function(){
71 | if (_this.element.readyState > 3){
72 | _this.ready = true;
73 | if ((time - _this.start) < 0 || time >(_this.start+_this.duration)){
74 | _this.element.currentTime = _this.sourceStart;
75 | } else {
76 | _this.element.currentTime = (time - _this.start) + _this.sourceStart;
77 | }
78 | } else {
79 | //If the element isn't ready to seek create a one-time event which seeks the element once it is ready.
80 | console.debug("Can't seek video due to readyState");
81 | _this.ready = false;
82 | eventOneTime(_this.element, "canplay", seekVideo);
83 | }
84 | };
85 |
86 | seekVideo();
87 | }
88 | /**
89 | * Pause the VideoSource if it is playing.
90 | */
91 | pause(){
92 | super.pause();
93 | this.element.pause();
94 | }
95 | /**
96 | * Set the VideoSource loading, when it's ready isReady() will return true.
97 | */
98 | load(){
99 | //check if we're using an already instatiated element, if so don't do anything.
100 |
101 | if (super.load()){
102 | //this.element.currentTime = this.sourceStart;
103 | this.seek(0);
104 | this.gl.texImage2D(this.gl.TEXTURE_2D, 0, this.gl.RGBA, this.gl.RGBA, this.gl.UNSIGNED_BYTE, this.element);
105 | this.ready = true;
106 | this.width = this.element.videoWidth;
107 | this.height = this.element.videoHeight;
108 | this.onready(this);
109 | return;
110 | }
111 | //otherwise begin the loading process for this mediaSource
112 | this.element = document.createElement('video');
113 | this.element.setAttribute("crossorigin", "anonymous");
114 | //construct a fragement URL to cut the required segment from the source video
115 | this.element.src = this.src;
116 | this.element.volume = this._volume;
117 | this.element.preload = "auto";
118 | this.element.load();
119 | let _this = this;
120 | this.element.addEventListener('loadeddata', function() {
121 | _this.element.currentTime = _this.sourceStart;
122 | _this.seek(0);
123 | _this.gl.texImage2D(_this.gl.TEXTURE_2D, 0, _this.gl.RGBA, _this.gl.RGBA, _this.gl.UNSIGNED_BYTE, _this.element);
124 | _this.ready = true;
125 | _this.width = _this.element.videoWidth;
126 | _this.height = _this.element.videoHeight;
127 | _this.onready(_this);
128 | }, false);
129 | /*this.element.addEventListener('seeked', function(){
130 | console.log("SEEKED");
131 | _this.ready = true;
132 | _this.onready(_this);
133 | })*/
134 |
135 |
136 | }
137 | /**
138 | * Render the VideoSource to the WebGL context passed into the constructor.
139 | */
140 | render(program, renderParameters, textures){
141 | this.element.playbackRate = renderParameters["playback_rate"];
142 | super.render(program, renderParameters, textures);
143 | }
144 | /**
145 | * Clean up the VideoSource for detruction.
146 | */
147 | destroy(){
148 | this.element.pause();
149 | if (this.disposeOfElementOnDestroy){
150 | this.element.src = "";
151 | this.element.removeAttribute("src");
152 | }
153 | super.destroy();
154 | }
155 | }
156 |
157 | export default VideoSource;
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/tutorial/1.png:
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/tutorial/3.png:
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/tutorial/4.png:
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/tutorial/5.png:
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/tutorial/6.png:
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https://raw.githubusercontent.com/bbc/html5-video-compositor/6dcffdf315e3a6aaa4fff5526c164676a307742b/tutorial/6.png
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/webpack.commonjs2.config.js:
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1 | module.exports = {
2 | entry: __dirname + "/src/main.js",
3 | output: {
4 | path: __dirname+'/dist',
5 | filename: "videocompositor.commonjs2.js",
6 | libraryTarget: "commonjs2",
7 | library: "VideoCompositor"
8 | },
9 | module: {
10 | loaders: [
11 | { test: /\.css$/, loader: "style!css" },
12 | { test: /\.js$/, exclude: /node_modules/, loader: "babel-loader"}
13 | ]
14 | }
15 | };
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/webpack.config.js:
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1 | module.exports = {
2 | entry: __dirname + "/src/main.js",
3 | output: {
4 | path: __dirname+'/dist',
5 | filename: "videocompositor.js",
6 | libraryTarget: "var",
7 | library: "VideoCompositor"
8 | },
9 | module: {
10 | loaders: [
11 | { test: /\.css$/, loader: "style!css" },
12 | { test: /\.js$/, exclude: /node_modules/, loader: "babel-loader"}
13 | ]
14 | }
15 | };
16 |
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24 |
25 | 