This changes the network API to use BufferSource instead of ArrayBuffer,
which allows plugins to return a "view" on a buffer instead of the
whole buffer. This also adds some utilities for changing between
views and buffers.
Lastly this forbids the use of the "buffer" property of TypedArrays
since it doesn't work with partial "views". This audits and fixes the
usages of the "buffer" property to ensure correct usage.
It should be noted that both MSE and EME accept a BufferSource as input,
so we don't need to convert a "view" into an ArrayBuffer before passing
to it.
Change-Id: Iaa417773f8ce5304424e43c7372ce10ebf540d2a
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
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
This sets a TextDisplayer to the native text displayer if native
controls were desired, or a custom UI text displayer otherwise.
This required adding methods to the player to switch out the current
text displayer if a new factory is provided, and a method to streaming
engine to reload the current text stream.
Change-Id: I85595e9ac9db0b60464ee7f20fa35855efb26424
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
With the new style rule, we cannot have two statements on the same line.
So we can no longer have an "if" on a single line and we cannot have
an arrow function with a body on the same line as when it is used.
This is mostly a manual change.
Change-Id: I2285202dd5ecbad764308bc725e6d317ff2ee7f0
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
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
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
When CEA captions are extracted from video segments, the
presentationTimeOffset of the video segment should be applied to the
extracted captions, as well.
Fixes b/70902665
Change-Id: I446333a14b8b6374786ab594a579b6e18bc73ac1
Before, media source engine could be created with no text displayer.
However, player would always create media source engine with a
text displayer.
Just like with closed captions, this appeared to be a good time
to change it to be passed in the constructor and have media source
engine own it.
This now means that media source engine is responsible for destroying
it - lessening player's responsibilities.
Change-Id: I71cd1c28a3c22d3c765a3892fe74ae3f9abd1914
In the methods use for testing, when getting the number of
close caption cues, we were only addressing the channel by "id".
This updates the name to be "channelId" so that it is clear
what the id will map to.
Change-Id: I773d5a63c376b832d492b41cf2505d8a27ea0f32
This change refines and emphasizes the message of the test only
methods for closed captions in text engine.
Change-Id: I0f13f0fa48f3b464c8dc4166ddbd12f09f53874c
The close caption map cannot be null in text engine, but we were
still checking if it was falsy. Since it can't be null, we can remove
the falsy check.
With the falsy check removed, the expression was able to be reduce
even further.
Change-Id: I839bc2337cfa1415cc6b00b75602e608f75b0e13
Refactor the closed captions support for HLS, using the same approach as
the closed captions support for Dash.
If closed captions are signaled in the manifest, player will create a
text stream for to represent the closed captions, and text engine will
store and append them. We don't need to set 'useEmbeddedText' value for
closed captions any longer.
Issue #1404
Change-Id: I9a5bf4df7e29d6e6982f29fd5e2df07bc78071d7
Removing a few hacks from player and streaming engine, so that now
closed captions streams are treated almost the same way as usual text streams.
Fixed the issue where toggling the closed captions doesn't work.
Fixed the delay of showing closed captions when we seek to a buffered
stream.
Issue #1404
Change-Id: I28a739f3033f30b53b3adf8fa1a181e3d4592f6f
Adding support for CEA closed captions embedded in video streams for
Dash.
1. Dash parser reads and parses closed captions' channel and language
information.
2. Player creates text streams for the closed captions.
3. Media Source Engine calls mux.js Caption Parser API to get the closed
captions embedded in the video streams.
4. Text Engine stores the closed captions, and text displayer shows the
captions.
TODO:
1. Add test cases, will send out another CL.
2. Change closed captions support for hls to the similar way we handle
dash closed captions, will send out another CL.
3. Handle dash content that's missing language indication from the manifest.
Issue: #1404
Change-Id: Ibae8f69623c13561415ec860107d7f5bc86e19e9
This reverts commit c38d4dd8d3, which
actually broke text range calculations in v2.3.10, and v2.4.2-v2.4.4.
The original commit was meant to account for the period start, but
resulted in a double-accounting of presentationTimeOffset.
The start and ends times passed into TextEngine's appendBuffer were
period-relative, so timestampOffset had already been applied. To
avoid further confusion and to fix the original issue the reverted
commit tried to address, these have been changed to
presentation-relative timestamps. Now the period start and all
offsets have been accounted for before the metadata reaches
MediaSourceEngine and TextEngine.
The tests added in the bad commit have been modified to test for the
opposite: that we do not erroneously account for timestamp offset when
calculating the buffered ranges for text.
Closes#1562
Change-Id: I9fa7a3f59906c4f3e623f411e48551f86f5c2ff7
For multi-Period content, we need to account for the timestamp offset
in the buffered range calculation since the start/end times are
given as Period-relative.
Change-Id: I6d32de2abc316918333b1c58ba73c71d028284c4
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
We incorrectly added the presentationTimeOffset to the segment times as
a fix for #1164. The correct fix is to use the include the PTO in the
time structure passed to the text parsers. This is a partial revert
of 207505.
Issue #1164Closes#1232
Change-Id: I1f2805e0dbdc44be71e2160b3d37a73732c97a4f
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
Instead of taking Uint8Array for media segments and ArrayBuffer for
init segments, take Uint8Array for everything.
Clean-up after #1022, discovered while preparing the upgrade guide for
v2.3.
Change-Id: I1f284f6f51f345e663c06d96d788bd9cfb941c52
This avoids having media from one period replaced by media from the
next period. Instead, media that comes before the period start will
be chopped off by MediaSource.
Closes#1098
Change-Id: Idf6dc2ffafe78214e94bc75aca63920e153f1a2c
We misinterpretted the EXT-X-START tag before. Now, we ignore this
tag and parse segment times from the segments themselves. This is
more robust for both VOD and live HLS content.
We avoid segment parsing when updating normal, well-behaved live
streams. For poorly-behaved live streams, we will fall back to
segment parsing and recover.
This also addresses the issue of VOD content which does not start at
zero. Instead of using configuration to make this playable, we will
now offset VOD content back to 0 automatically.
Issue #740Closes#1011
Change-Id: Ib3a59f87e3a050244cd39854409d8e3542c50b0a
We want to be able to write logs for deprecated APIs. This ensures
that those logs appear even when we disable logging in compiled builds.
Change-Id: I1f1546049fb17967eedb1bb45a7f76d5b1809cd1
This converts from using ArrayBuffer in the text parsers to using
Uint8Array. This avoids doing extra buffer copies when using
ArrayBuffer.slice().
Closes#1022
Change-Id: I34a789ec4eb76c95169ba81f27a8433ef25f27f0
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
Jacob Trimble
Theodore Abshire
Joey Parrish
Aaron Vaage
Michelle Zhuo
Sandra Lokshina