Previously any `CuesWithTiming.durationUs` could be `TIME_UNSET`,
meaning it should be replaced by the next `CuesWithTiming` instance
(instead of being merged if the durations overlap, which is currently
the expected behavior for all `CuesWithTiming` with a 'real' duration).
This technically allowed a single subtitle track to include a mixture of
`CuesWithTiming` that should be merged, and some that should be
replaced. This is not actually needed for any of the subtitle formats
currently supported by ExoPlayer - in all cases a format expects either
all cues to be merged, or each cue to replace the previous one.
Supporting this mixture of merging and replacing in `TextRenderer` ended
up being very complicated, and it seemed a bit pointless since it's not
actually needed. This change means a given subtitle track either merges
**all** cues (meaning `CuesWithTiming.durationUs = C.TIME_UNSET` is not
allowed), or **every** cue is replaced by the next one (meaning
`CuesWithTiming.durationUs` may be set (to allow for cues to 'time out',
needed for CEA-608), or may be `TIME_UNSET`).
This value will be used in a subsequent change that adds cue-merging
support to `TextRenderer`.
PiperOrigin-RevId: 565028066
This is equivalent to the existing `scaleLargeTimestamp` method with the
following changes/improvements:
* No longer specific to timestamps (there was nothing inherently
time-specific about the logic in `scaleLargeTimestamp`, but the name
and docs suggested it shouldn't be used for non-timestamp use-cases).
* Additional 'perfect division' checks between `value` and `divisor`.
* The caller can now provide a `RoundingMode`.
* Robust against `multiplier == 0`.
* Some extra branches before falling through to (potentially lossy)
floating-point math, including trying to simplify the fraction with
greatest common divisor to reduce the chance of overflowing `long`.
This was discussed during review of 6e91f0d4c5
This change also includes some golden test file updates - these
represent a bug fix where floating-point maths had previously resulted
in a timestamp being incorrectly rounded down to the previous
microsecond. These changes are due to the 'some more branches' mentioned
above.
PiperOrigin-RevId: 564760748
Created new method `AudioSink#setOffloadDelayPadding` that will set delay and padding data onto an `AudioTrack` using `AudioTrack#setOffloadDelayPadding`. This feature adds support for offloaded, gapless Opus playback as the content requires the capability to set padding data post-`AudioSink#configure`.
PiperOrigin-RevId: 562518193
In most cases, the places that were trying to avoid a transitive
dependency on `lib-exoplayer` when this duplication was introduced [1]
are already depending on it again, except for `lib-container` where the
dep is added in this change.
In general it seems fine for the tests of module A to depend
(transitively or directly) on module B even where the prod code of
module A **does not** depend on module B.
[1] <unknown commit>
PiperOrigin-RevId: 561660371
Also re-jig some `checkNotNull` calls to satisfy the nullness checker
(remove an unneeded one, and add a new one).
Follow-up to discussion in bb214b19f9
PiperOrigin-RevId: 561295724
In an upcoming change I'm going to mark SSA subtitles as 'merge
replacement behavior', which will mean that
`CuesWithTiming.durationUs=C.TIME_UNSET` will not be permitted. This CL
makes it clear that `SsaParser` obeys that invariant.
PiperOrigin-RevId: 557504633
This `DvbParser` was updated to implement the new `SubtitleParser`
interface in 2261756d3a.
This method used to return a `List<Cue>`, but now it returns a
`List<CuesWithTiming>`, which is closer to `List<List<Cue>>`. The
previous method returned an empty list, meaning a single 'event' with
no cues. After the change above the method still returns an empty list,
but that now means 'no events'. In order to maintain the old behaviour,
this change updates it to return a single-item list containing an empty
list of cues.
PiperOrigin-RevId: 557502261
This test uses an existing CBR test asset, and shows that (as expected)
`isSeekable = true` even in the `unknown_length` dump file.
PiperOrigin-RevId: 557455364
`asReadOnlyBuffer` doesn't copy the original byte order but always sets it to big-endian. Replace calls to it with a utility method that manually sets the byte order after creating the read-only copy.
This fixes `TeeAudioProcessor` providing a `ByteBuffer` always in big-endian and hence causing `AudioBufferSink` to read wrong data.
PiperOrigin-RevId: 554861402
`SubtitleExtractor` used to rely on a `SubtitleDecoder`. However, now all SubtitleDecoders that are used for side-loaded subtitles have been migrated to a `SubtitleParser` interface. We can therefore refactor the extractor.
The `SubtitleExtractor` is only used for side-loaded subtitles which means we do not require the migration of the CEA-608/708 `SubtitleDecoders`.
PiperOrigin-RevId: 552471710
Instead of `text/x-exoplayer-cues`, we will use `application/x-media3-cues`.
The prefix should be `application` not `text` since the encoded form is arbitrary bytes, not necessarily text. The name should not reference `exoplayer`, since the Media3 Extractors (which are not part of `exoplayer`) produce this format.
PiperOrigin-RevId: 550181852
`TtmlDecoder` which used to be `SimpleSubtitleDecoder` will now be called `TtmlParser` and implement SubtitleParser interface. For backwards compatibility, we will have the same functionality provided by `DelegatingSubtitleDecoder` backed-up by a new `TtmlParser` instance.
PiperOrigin-RevId: 549700490
It is not part of the `SubtitleParser` interface's promise to give events for all changes to do with `Cue` objects. So while in the past, we would have `endTimeUs` of one Cue event being the `startTimeUs` of the next one, now we have that encoded in `durationUs` and can skip event with empty `Cues`.
PiperOrigin-RevId: 549629157
`WebvttDecoder` which used to be `SimpleSubtitleDecoder` will now be called `WebvttParser` and implement `SubtitleParser` interface.
For backwards compatibility, we will have the same functionality provided by `DelegatingSubtitleDecoder` backed-up by a new `WebvttParser` instance. `WebvttSubtitle` will still be used behind the scenes to handle overlapping `Cues`.
PiperOrigin-RevId: 549298733
The end-to-end test output for the overlapping SRT and SSA subtitles
is currently incorrect. They will be fixed in a future change that
updates `TextRenderer` to support this overlap.
The 'extra' samples visible in the extractor test output files are
'empty cue list' samples produced by `SsaParser`. They will go away
when this implementation is updated to remove this behaviour and rely
on `CuesWithTiming.durationUs` instead (the 'empty list' behaviour is
not required by the `SubtitleParser` interface).
PiperOrigin-RevId: 549264593
This fixes two things in one go:
1. In order to indicate 'end of a cue' **without** relying on
`CuesWithTiming.durationUs`, `SubripParser` should have been emitting
an empty `List<Cue>` instead of the current behaviour of a
single-item list with `cue.text=""`.
2. There's no need for the empty cue (or cue list), we can use
`durationUs` to indicate the end of each list of cues.
There's no real need to ever have a `Cue` with `text=""`, so also
deprecate `Cue.EMPTY`.
PiperOrigin-RevId: 548938874
This is a step towards adding general support for overlapping
subtitles in these formats (and others), both muxed and sideloaded:
* Issue: google/ExoPlayer#10295
* Issue: google/ExoPlayer#4794
This change adds these files to the end-to-end playback tests too, but
the subtitle track is currently disabled because renderer-side subtitle
parsing causes flaky tests (due to an uncontrolled thread in
`SimpleSubtitleDecoder`). The subtitle track will be re-enabled in
a follow-up change when loading-side subtitle parsing is added (so the
tests will no longer be flaky). At this point the overlapping subtitles
**still** won't be supported end-to-end, but a second change will
resolve this will changes in `TextRenderer` - which will change the
end-to-end playback dumps to reflect the overlapping subtitles.
PiperOrigin-RevId: 548705032
It will act similarly to `SubtitleDecoderFactory`, but return parsers instead of decoders. In turn `SubtitleDecoderFactory.createDecoder()` cab wrap those parsers with `DelegatingSubtitleDecoder`.
PiperOrigin-RevId: 548528054
`PgsDecoder` which used to be `SimpleSubtitleDecoder` will now be called `PgsParser` and implement `SubtitleParser` interface. For backwards compatibility, we will have the same functionality provided by `DelegatingSubtitleDecoder` backed-up by a new `PgsParser` instance.
PiperOrigin-RevId: 548520549
`DvbDecoder` which used to be `SimpleSubtitleDecoder` will now be called `DvbParser` and implement `SubtitleParser` interface. There was, however, already a `DvbParser`, used by `DvbDecoder` behind the scenes. Hence, the refactoring only requires the existing `DvbParser` to adhere to the new `SubtitleParser` interface.
For backwards compatibility, we will have the same functionality as `DvbDecoder` provided by `DelegatingSubtitleDecoder` backed-up by a new `DvbParser` instance, available from the `SubtitleDecoderFactory`.
PiperOrigin-RevId: 548155759
`Tx3gDecoder` which used to be `SimpleSubtitleDecoder` will now be called `Tx3gParser` and implement `SubtitleParser` interface. For backwards compatibility, we will have the same functionality provided by `DelegatingSubtitleDecoder` backed-up by a new `Tx3gParser` instance.
PiperOrigin-RevId: 548144492
Add Ogg ID Header and Comment Header Pages to the Ogg encapsulated Opus for offload playback. This further matches the RFC 7845 spec and provides initialization data to decoders.
PiperOrigin-RevId: 548080222
`Mp4WebvttDecoder` which used to be `SimpleSubtitleDecoder` will now be called `Mp4WebvttParser` and implement `SubtitleParser` interface. For backwards compatibility, we will have the same functionality provided by `DelegatingSubtitleDecoder` backed-up by a new `Mp4WebvttParser` instance.
PiperOrigin-RevId: 547248157
This is needed for several subtitle formats where the `data` passed to
`SubtitleParser` doesn't contain any cue timing, such as PGS, CEA-608,
CEA-708, and DVB.
PiperOrigin-RevId: 547177127
Also parse the PCM encoding for lpcm in MP4, and update `MatroskaExtractor`
similarly.
Tested manually in the demo app using an MP4 with 24-bit big endian audio.
PiperOrigin-RevId: 546878505
`SubripDecoder` which used to be `SimpleSubtitleDecoder` will now be called `SubripParser` and implement `SubtitleParser` interface. For backwards compatibility, we will have the same functionality provided by `DelegatingSubtitleDecoder` backed-up by a new `SubripParser` instance.
PiperOrigin-RevId: 546538113
`SsaDecoder` which used to be `SimpleSubtitleDecoder` will now be called `SsaParser` and implement `SubtitleParser` interface. For backwards compatibility, we will have the same functionality provided by `DelegatingSubtitleDecoder` backed-up by a new `SsaParser` instance.
PiperOrigin-RevId: 546336035
