This optimization allows a ChunkSampleStream to output track
formats as soon as they're parsed during an InitializationChunk
load, rather than waiting until after the InitializationChunk
load is completed.
In DASH VOD, a single InitializationChunk typically loads the
moov and sidx atoms in that order. Hence for long form content
where the sidx is a non-trivial size, this may result in the
track formats being output a non-negligible period of time
sooner than was previously the case. This allows downstream
renderers to start codec initialization sooner, potentially
decreasing startup latency.
For a single test stream on a fast & stable network, this
pretty consistently reduced elapsed time until both audio and
video codecs have been initialized from ~0.5s to ~0.3 seconds
on a Galaxy S8. For 5 test runs without and with these patches,
the eventTime logged by EventLogger for the second decoder
init were:
Without (secs): 0.47 0.47 0.45 0.48 0.46
With (secs) : 0.32 0.33 0.34 0.31 0.40
PiperOrigin-RevId: 289845089
The current order of operations means that the Format is only passed
to the chunk's output after the DataSource has been opened. This
means that establishing the network connection and the downstream
renderers initializing their codecs are effectively serialized to
occur one after the other.
In the new order, the Format is passed to the chunk's output before
the DataSource has been opened. This allows the downstream renderers
to initialize their codecs in parallel with the network connection
being established, and hence latency at the start of playback is
reduced.
PiperOrigin-RevId: 289841854
As discovered whilst investigating #6798, there are cases
where these methods are not correctly. They were added as
convenience methods that could be overridden by concrete
DownloadService implementations, but since they don't work
properly it's preferable to require application code to
listen to their DownloadManager directly instead.
Notes:
- The original proposal to fix#6798 stored the state change
events in memory until they could be delivered. This approach
is not ideal because the events still end up being delivered
later than they should be. We also want to fix the root cause
in a different way that does not require doing this.
- This change does not fix#6798. It's a preparatory step.
Issue: #6798
PiperOrigin-RevId: 289418555
This change makes it clear the SampleQueue doesn't outlive
the wrapping PlayerTrackEmsgHandler, and releases it from
PlayerTrackEmsgHandler.release().
This change is a no-op because calling release() is the
same as reset() in this case (the behavior only differs if
a non-dummy DrmSessionManager is being used).
PiperOrigin-RevId: 289416622
As a result, onMediaChunkLoadStarted gets invoked on the loading thread, and
init on the playback thread, matching the thread access comments.
Issue:#6321
PiperOrigin-RevId: 289167981
Unfortunately devices such as the MI 8 do not provide an alternative
working decoder. Some Vivo devices do provide one though.
PiperOrigin-RevId: 288911897
This improves readability by making clearer that reading no bytes from
the input in readFrames() is an expected case if the buffer is full.
PiperOrigin-RevId: 288711841
- Simulate IO exceptions in the test using FlacBinarySearchSeeker for
seeking in FlacExtractorTests. This makes the test slower but covers
more test cases.
PiperOrigin-RevId: 288285057
This typo was introduced in ddb70d96ad
when migrating a static method with parameter `durationUs` to an
instance method where the correct field to use was `blockDurationUs`
(but `durationUs` also exists).
The test that catches this was only added in 45013ece1e (and
therefore configured with the wrong expected output data).
issue:#6833
PiperOrigin-RevId: 288274197
It's unreliable for at least one IMA ADPCM file I've found.
Calculating the blockIndex to seek to using exact properties
also seems more robust.
Note this doesn't change anything for the existing PCM test,
since averageBytesPerSecond is set correctly. It does make
a difference for an upcoming IMA ADPCM test though.
PiperOrigin-RevId: 287814947
Add support for MP3 as an encoding format for passthrough.
This change does not change the observable
behavior of Exoplayer.
Also name the magics.
#exo-offload
PiperOrigin-RevId: 286146539
- Make extractor output samples that are uniformly distributed
with respect to time, with a target of ~10 samples per second.
The old approach could in theory put every frame into its own
sample, which would be very inefficient downstream because we'd
need to pass them individually to MediaCodec. It could also put
data corresponding to a long duration of time into a single
sample (e.g. if the sample rate of the content is low), which
is bad downstream because we decide whether to set the decodeOnly
flag on a per sample basis. More generally, the new approach
is more predictable :).
- Stop using the WavSeekMap to get sample timestamps, and instead
calculate them directly from the number of frames output. It's
more obviously correct, particularly for data formats like IMA
ADPCM where we'll need to adjust the data prior to output.
PiperOrigin-RevId: 285750010
Also change IcyInfo.rawMetatadata from String to byte[]
ICY doesn't specify the character encoding, and there are streams
not using UTF-8 (issue:#6753). It seems the default of at least one
server is ISO-8859-1 so let's support that as a fallback:
https://github.com/savonet/liquidsoap/issues/411#issuecomment-288759200
Also update IcyDecoder to skip strings it doesn't recognise at all
instead of decoding invalid characters.
The feed from issue:#6753 now decodes accents correctly:
EventLogger: ICY: title="D Pai - Le temps de la rentrée", url="null"
PiperOrigin-RevId: 285388522
We previously used Locale.fromLanguageTag and then toLanguageTag to automatically
filter out invalid tags and to replace deprecated tags. However, this only works
for API 21+.
This change does no longer rely on the platform methods and instead:
1. Keeps invalid tags as they are. This may help if developers rely on
non-spec-complaint language tags (for example, #6681).
2. Adds a list of deprcated tags and their modern replacements to our code
3. Normalizes some short codes that have been superseded by macrolanguage codes by
their macrolanguage equivalent.
Issue:#6681
PiperOrigin-RevId: 285384841
Retrieve the sample number in the extractor instead of passing a holder
to FlacBinarySearchSeeker. This change makes the code easier to
understand and is required to implement the seeking from the seek table.
PiperOrigin-RevId: 285241862
- WavHeader is now immutable and contains only values parsed out
of the WAVE FMT chunk. It no longer contains a C.PcmEncoding
encoding, or mutable data bounds.
- WavHeaderReader now parses the WAVE header chunks without any
additional logic (e.g. validating the block alignment value,
which is format type dependent).
- The SeekMap part of WavHeader is split out into WavSeekMap.
PiperOrigin-RevId: 285232498
This makes the format metadata null (instead of an empty Metadata
object) when it is not provided, and is therefore consistent with the
other extractors behavior.
PiperOrigin-RevId: 284171148
Saves around 200 lines of code. High level overview:
- Rename SampleQueue to SampleDataQueue.
- Rename SampleMetadataQueue to SampleQueue.
This CL should not introduce behavior changes. The only significant
changes in synchronization should be:
+ Add synchronized keyword to isReady.
- Seems to be necessary.
+ Add synchronized keyword to SampleQueue.sampleMetadata.
- Before this change, SampleQueue.sampleMetadata could acquire the
SampleMetadataQueue lock three times in a single method call.
Other miscellaneous improvements:
+ Put all private methods at the bottom.
+ Move release() to the right category.
PiperOrigin-RevId: 283795844
Where media segments are specified using byte ranges, it makes
sense that a server might return 416 (which we don't consider
for blacklisting) if the segment is unavailable, rather than
the 404 (which we do consider for blacklisting) that we expect
when media segments are only specified using a URL.
Issue: #6775
PiperOrigin-RevId: 286620698
The Download constructor considers it invalid to have a failure
reason if the download isn't in the failed state. Unfortunately,
calling DefaultDownloadIndex.removeAllDownloads when there's a
failed download will change the state without clearing the reason.
If the downloads are then read back from the DefaultDownloadIndex
we end up violating the Download constructor assertion.
This change clears the failed reason for any existing rows in the
invalid state, and also fixes the root cause that allows invalid
rows to enter the table in the first place.
Issue: #6785
PiperOrigin-RevId: 286576242
Without this @Nullable, potential subclasses can't override the
method to return null if they don't want to use the renderer as a
media clock.
Issue:#6792
PiperOrigin-RevId: 286545736
In MatroskaExtractor, if the last cue time exceeds the duration
specified in the header, then we end up generating a negative
duration chunk as the last item in the SeekMap. We should probably
not do this, so drop it instead.
Note: Matroska does have a CueDuration element, but it's not used
in the one problematic file I've found.
PiperOrigin-RevId: 285738418
This has been broken since
c3d6be3afd
and broken for ICY (where I noticed the problem) since
5695bae9d8.
ICY symptom is that we see no repeated metadata, because the
Icy-MetaData:1 header doesn't make it to the server so we never get back
icy-metaint.
PiperOrigin-RevId: 285379234
The presentationTimeOffsetMs may be C.TIME_UNSET for VOD content
and shouldn't be used in calculations for the windowStartTime.
PiperOrigin-RevId: 285363095
Keyframe was rendered rather than skipped when performing
an exact seek to a non-zero position close to the start of
the stream.
PiperOrigin-RevId: 284798460
Caveats:
- Block additional data is ignored if the block is laced
and contains multiple samples. Note that this is not
a loss of functionality (SimpleBlock cannot have block
additional data, and lacing was previously completely
unsupported for Block)
- Subrip and ASS samples are dropped if they're in laced
blocks with multiple samples (I don't think this is
valid anyway)
Issue: #3026
PiperOrigin-RevId: 284545197
This change constrains the use of sample state member variables to
writeSampleData, finishWriteSampleData and resetWriteSampleData.
Using them elsewhere gets increasingly confusing when considering
features like lacing in full blocks. For example sampleBytesWritten
cannot be used when calling commitSampleToOutput in this case
because we need to write the sample data for multiple samples
before we commit any of them.
Issue: #3026
PiperOrigin-RevId: 284541942
- Remove "lacing" from member variables. They're used even if
there is no lacing (and the fact that lacing is the way of
getting multiple samples into a block isn't important).
Issue: #3026
PiperOrigin-RevId: 284152447
- Change sampleHasReferenceBlock to a block reading variable, which is
what it is (the distinction didn't matter previously, but will do so
when we add lacing support in full blocks because there wont be a 1:1
relationship any more.
- Move sampleRead to be a reading state variable.
- Stop abbreviating "additional"
Issue: #3026
PiperOrigin-RevId: 284000937
An I/O error could occur while handling the start of an mdta box, in
which case retrying would cause another ContainerAtom to be added. Fix
this by skipping the mdta header before updating container atoms.
PiperOrigin-RevId: 284000715
