Commit Graph

35 Commits

Author SHA1 Message Date
Joey Parrish f539147d48 fix: Correct license headers in compiled output
This fixes all the license headers in the main library, which corrects
the appearance of the main license in the compiled output.

It seems that the `!` in the header forces the compiler to keep it in
the output.  I believe older compiler releases did this purely based
on `@license`.

Issue #2638

Change-Id: I7f0e918caad10c9af689c9d07672b7fe9be7b2f3
2020-06-09 16:05:09 -07:00
Joey Parrish 92ecacb663 Export default text parser plugins
This makes it easier for apps to app-specific build subclasses of
these plugins.

Closes #2428

Change-Id: I4fde7de76c139bfeddc1afecccf9374a49ecee19
2020-02-26 10:22:27 -08:00
Jacob Trimble 3f63021a2f Avoid using "new" with factories.
Instead of having the "factories" use "new" to construct them, now they
will be plain functions.

Closes #1521

Change-Id: Ia6151ad679a78a5c6db128d43094c82add0af348
2020-02-19 09:57:51 -08:00
Joey Parrish 64896d70b0 Use shorter license header
This reflects changes in Google's policy on JavaScript license
headers, which should be smaller to avoid increasing the size of the
binary unnecessarily.

This also updates the company name from "Google, Inc" to "Google LLC".

Change-Id: I3f8b9ed3700b6351f43173d50c94d35c333e82b4
2019-11-22 18:18:36 +00:00
michellezhuo 1ada5e7574 [Hls] Move MPEG TS Timestamp rollover to Vtt Text Parser
Change-Id: Id840f8201d9d31f00fa38c88f632ff9e515e07a6
2019-10-08 23:39:52 +00:00
michellezhuo 9d66e3bb09 [Hls] Avoid duplicate calls to get segment start time for VOD
For VOD, the first segment of every Media Playlist in every Variant
Stream must start at the same media timestamp. Thus, we can get the
start time once and store the value, and all the streams can use the
value directly. For live, we assume for the same.
This change reduces calling getStartTime_() from 15 times to once for
Angel One, and also fixes the text segment timestamp issue.
Also removed associated methods that no longer needed.

Closes #1558
Closes #1563

Change-Id: I0e95ab93ea2b13758128f11019b262bc53dbcd38
2019-09-30 15:43:57 -07:00
Jacob Trimble 50938a02a4 Remove throws directives.
These are intermittently used and cannot be verified.  Most of our
methods can throw a shaka.util.Error, so having it doesn't really add
anything.  Plus, if we change a function to throw, we'd need to update
all their callers to ensure they have an accurate description of what
they throw; otherwise we can't trust the directive.

Change-Id: I520bd0fc4c33443e967bf5b103ca5aa9e3274884
2019-08-28 17:00:04 +00:00
Theodore Abshire 3a67802ce2 Fix parseFirstCue test on some platforms.
It turns out that, on some browsers, incomplete XML does not properly
parse. This means the parseFirstCue tests did not work on those platforms.
This modifies those tests on platforms that do not support partial XML;
when no support is detected, it instead tries to get the first cue
from a non-partial segment.
This also modifies the HLS parser to only load partial text segments if
the text parser supports it; otherwise, the hls parser will load full
captions in order to extract start times.

b/137945635
Issue #2037

Change-Id: I58112864a818baf155b365a65fba1c8a56eb9520
2019-07-24 11:23:03 -07:00
Theodore Abshire 1e12873fb7 Only parse first cue when getting text start time.
Previously, when the text engine tried to load the start time of
a segment, it would parse every cue in that segment, then check the
time of the first cue. This was judged to not be a significant
performance issue, as parsing cues is a fast operation. However, it
did have an unintended side-effect: in some situations, this method
was being passed partial segments; notably, the HLS parser would load
the first 2048kb of the stream's texts to extract timing data.
If the caption parsers tried to actually parse an incomplete caption,
they would error.
This gives the text parsers "parseFirstCue" methods, and uses those
methods when it only needs the first cue anyway.

Fixes #2037

Change-Id: I2a1fb2f1a96d98967f0c6e6a5c277914a28b42ad
2019-07-17 21:27:32 +00:00
Jacob Trimble 5c35108cb8 Avoid integer for loops.
Issue #1518

Change-Id: I3ba3cb6a439264e823022b2a64e7cdbd265494c7
2019-07-09 17:11:49 +00:00
Jacob Trimble 001c3c7b8c Add check for common misspellings.
Change-Id: Iaf546678ed787724513ed21b19a78cc895f069e8
2019-07-08 12:08:45 -07:00
Jacob Trimble 5ddb92a4ee Convert text files to ES6.
Issue #1157

Change-Id: I33df747b0fad0e6d8f5e3d7dc8f5c93bd07800b1
2019-05-21 22:31:19 +00:00
Jacob Trimble d5780d401b Fix line length issues for indent fix.
Change-Id: I87d75fd88000f8f9bff7b9f1bf5667ba28f6dd60
2019-05-13 22:31:20 +00:00
Jacob Trimble f130dffcef Enable eslint indentation rule.
This is a fully automated change.  The linter will fail because the
extra indentation caused line-length errors.  These won't be fixed
automatically.  They are fixed in a follow-up to make this one fully
automated.

Change-Id: I4d8cf9c998985add2bcd24a81c8d65495668c4f3
2019-05-13 22:31:09 +00:00
Jacob Trimble 47daf49f31 Use arrow functions for callbacks.
This is an automated change to convert use of "function" functions
to arrow functions.  This doesn't change all uses of bind() that
could be converted.  This also doesn't remove all "function" functions.

Change-Id: I40ac7d086bcef947a1be083359c8fd1d4499a9c3
2019-05-09 16:40:46 +00:00
Jacob Trimble c81389741f Prefer const over let.
A coming update to the Google eslint config will require using "const"
over "let".  This makes that one change to isolate the big changes.

Change-Id: I7d0974c3ae15c53cc45a6b07bf9f6586e2d34aca
2019-05-08 09:22:10 -07:00
Joey Parrish cbfe4f82a4 Fix warnings found by a newer compiler version
This is only some of the warnings produced.  These were not errors,
but we should fix them anyway so that we can adopt stricter settings
in future.

Change-Id: Ifd12f0e7c69f8f4b3d0d78b11794da2569a06d77
2019-05-06 22:25:12 +00:00
Michelle Zhuo 1f324e27e7 Separate text direction and writingMode
CSS style 'direction' supports only horizontal directions, (left to
right, right to left), and writing-mode supports horizontal top to
bottom, vertical left to right, vertical left to right.
Separating the field 'writingDirection' to two fields 'direction'
and 'writingMode', so that they're the same as the css style names.

Issue #1708

Change-Id: Ie730bd7d13e5483d7425261854c268cd7f095400
2019-01-11 00:40:27 +00:00
Joey Parrish 7091275cbf Replace indexOf with includes, startsWith
This replaces almost every instance of indexOf on both String and
Array.  There are very few places where we really wanted an index.
Mostly, indexOf was used to check for inclusion.

Change-Id: I08e299768b6ffdb4bfc30b39b5d82a058c6d1b56
2018-09-14 19:10:56 +00:00
Joey Parrish fd0449d8f7 Re-enable some disabled style rules
This re-enables the following style rules:
  - "block-spacing"
  - "brace-style"
  - "comma-dangle"
  - "comma-spacing"
  - "new-cap"
  - "no-multi-spaces"
  - "no-multiple-empty-lines"
  - "one-var"
  - "padded-blocks"
  - "prefer-rest-params"

Change-Id: I15d616e8d5b88b273ded6128b4f9ad86bdb26bd1
2018-07-09 19:44:56 +00:00
Jacob Trimble 759eef9685 Change goo.gl links to bit.ly.
https://goo.gl is being turned-down, so we can't use it for new URLS.
So we have consistent short links, this converts them to be
https://bit.ly.

Change-Id: I07a86cba807b67157664893341f648023918d0de
2018-06-22 20:20:00 +00:00
Sandra Lokshina 8065bd54a8 Change namespace from shakaExterns to shaka.externs
Change-Id: I16432351e2a266aa8fd175669aa27c44bfdffeae
2018-04-11 17:26:26 +00:00
Joey Parrish 772dc231c9 Remove non-nullable on implicit non-nullable types
This is a style cleanup to pass stricter checks from future versions
of the Closure linter.

Change-Id: Icca8f974af7c9f4834acf6bba69e4cef1f89e502
2018-04-09 14:52:59 -07:00
Theodore Abshire d46e8fdf92 Typo fixes and rewording in comments, part 6
This makes a large number of small typo fixes. It also rewords a
number of comments and JSDoc descriptions, and does some
formatting standardization.

This doesn't fix every single issue, but it fixes a lot. Notably,
there were some formatting issues I declined to standardize due to
ambivalence on what the proper standardization would be; for example,
when and where empty lines should show up in JSDoc.

Change-Id: I2bfa4d531a8fcdcf9578e9c181c4534ad7443b7a
2018-03-21 17:59:42 +00:00
Jacob Trimble 624acc66b8 Add curly braces to all blocks.
Google style guide requires adding curly braces to all block statements
even if it is only has one line.  This fixes it by using eslint's
--fix flag followed by running clang-format to reformat the change.

Change-Id: Idc086c2aa8c02df5ef8b2140a11bfb9128eeb4bd
2018-02-21 11:23:34 -08:00
Jacob Trimble b512db87dd Convert 'var' to 'let'/'const' (8 of 9).
This is part of a change to convert all usages of 'var' with either
'let' or 'const'.  This takes a conservative approach for 'const' where
it will only be used for aliases and storing the "original" values in
tests.

Change-Id: I6a329d28e13a81c9f7136737518c6bb8fa18402e
2018-02-20 11:29:30 -08:00
Sandra Lokshina 118756e8e8 Add parsing of VTTRegions and TTML attributes set in pixels.
Closes #1188

Change-Id: Ib9fc1a5b35065fdadafae01df4737ce1dcfa3ada
2018-02-08 18:19:31 +00:00
Joey Parrish d36168a55f Protect against WebVTT MPEGTS rollover
When the MPEGTS field rolls over in HLS live WebVTT, we need to avoid
our parsed cue timestamps rolling over as well.  To achieve this, we
simply ignore the X-TIMESTAMP-MAP tag once the segment index is built.

Rollover in TS video and audio segments is handled by mux.js already.

Closes #1191

Change-Id: Ie52734509921973ff47517fab34367ec413a6ca6
2018-01-19 21:48:35 +00:00
Joey Parrish 4067c20a7c [ES6] Replace gjslint with compiler linter & eslint
The eslint configuration is derived from analyzing the style of our
sources as they are now, plus a few tweaks.

In particular, we have disabled checks for undefined variables and use
of console, both of which the compiler handle with greater precision.
The compiler already knows what is defined in the environment through
our externs, and has specific exceptions for the use of console (demo,
tests).

We have also disabled a few checks that we should use, but will
require many changes to the code: no-unused-vars, no-redeclare,
and comma-dangle.

This commit also fixes several types of eslint errors that were easy:
  - no-useless-escape (unneccessary escape characters in Regexp)
  - no-constant-condition (using true/false/0/1/etc in if/while)
  - no-fallthrough (caught an actual bug in one EME polyfill)
  - no-irregular-whitespace (we had a UTF-8 nbsp in externs)
  - no-cond-assign (using an assignment inside a conditional)

To satisfy stricter provide/require checks in the Closure Compiler
Linter, we will no longer use provide/require at all in tests.  We
will still use provide in test utilities (test/test/util/) since it
sets up the namespace for us.  But we will not use require there
because there is no deps management for test code.

Issue #1157

Change-Id: Icc44f51feeb568ea7d3980e693e92e560d897afd
2018-01-16 17:25:05 +00:00
Joey Parrish 66bfa31538 Do not use VTTRegion yet
Our use of VTTRegion seems to be wrong.  The feature in Chrome is
behind the "experimental web platform features" flag.  If this is
turned on, we display subtitles in the wrong place.

Until we can verify and fix our usage of VTTRegion, we will not
use it.  There are other issues to deal with in our region support,
in particular that TTML uses px and VTT uses percentages.  Futher,
our VTT parser does not yet extract region information.

This fixes the main issue for v2.3, so that future releases of Chrome
do not break sites built with v2.3.  There is more work to do in v2.4.

Issue #1188

Change-Id: I0de3392bdfca381c3727580e66c1a57ec457c5c2
2017-12-18 22:39:20 +00:00
Joey Parrish 9759eddf54 Ignore style blocks in WebVTT
We do not support CSS embedded in WebVTT at this time.  Instead of
failing to parse the cues, skip the style block.

Closes #1104

Change-Id: I3d500ba11afe43e81bbdef9924e4dd9e05db2b85
2017-12-05 23:31:23 +00:00
Joey Parrish a7dec51f76 Make VTT settings parser more flexible
We can now accept non-integral values in settings, such as
"position: 100.0%" instead of just "position: 100%".

The regex change is very simple, so we would also accept invalid
settings such as "position: 12.34.56%" or "position: ...%", both
of which would result in NaN in the output.

Issue #919

Change-Id: I0a437322e76e35fe1d2f369b4a3ea87269799431
2017-08-04 21:28:15 +00:00
Sandra Lokshina 2aefcb8eb6 TtmlParser: add support for tts:direction attribute.
Closes #927.

Change-Id: If7394ecbbee861ad5b60c3c2bfd929ecd999db3e
2017-07-31 18:44:15 +00:00
Sandra Lokshina c70367dc97 Separate text parsing and display logic.
Closes #796.
Closes #923.

Change-Id: Ifc2017b40a0fb570103f0fed7bc130aa24819e9f
2017-07-17 21:39:59 +00:00
Sandra Lokshina c6c6d05810 Move text-related files into their own directory.
This change creates a lib/text directory and moves all files
with text-related logic to it. It also lays the ground for
separating text parsing and display logic. (That change will
introduce even more files with text-related logic which will
crowd lib/media directory).

Issue #796.

Change-Id: I65ac134020a0126ff02a8f2067beb73870232e65
2017-06-06 18:21:09 +00:00