Commit graph

50 commits

Author SHA1 Message Date
Edward Hervey
0639f117cb hlsdemux2: Remove enable-llhls property
This was only used for testing purposes

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:24 +00:00
Edward Hervey
714628f1ec hlsdemux2: Improve live playlist update intervals
The live playlists should be updated at a defined interval. The problem is that
this interval was used *after* the playlist was finally received and processed,
which resulted in a gradual shift happening in playlist updates.

Instead store and use the time at which playlists were requested to determine
when the next one should be downloaded.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:23 +00:00
Edward Hervey
5935c8049a hlsdemux2: Fix position searching
The scanning is done in a reverse order, the proper full checks to do are
therefore:
* If the position is beyond half a "segment duration", it's in the following
segment
* If the position is within the first half of a segment, it's in that one
* If the segment is the first one and the position is within half a duration
backwards, we consider the position as being within that first segment

Also handle the case where a "partial only" segment doesn't have a reliable
duration, and therefore use the playlist target duration instead.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:23 +00:00
Edward Hervey
1c6364673d hlsdemux2: Handle all cases for starting segment calculation
The implementation wouldn't work with regular HLS streams (i.e. the final
fallback).

Now that the implementation uses time to search for the starting
segment (instead of just the n-th from the end), we can specify the correct
hold_back fallback value from the RFC

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:23 +00:00
Edward Hervey
3129970c8a hlsdemux2: Fix buffering threshold calculation and handling
* The checks for smaller values were wrong
* Properly initialize the stream default recommended buffering threshold so that
  a default (10s) value is used until the subclass can provide a proper value

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:23 +00:00
Jan Schmidt
2b93dae59a hlsdemux2: Handle async playlist loading failures
Add failed variant playlists to a list and failover to other variants until
there is none left

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:23 +00:00
Jan Schmidt
9ae3978c72 hlsdemuxdemux2: Consider the hold-back when calculating seek range
When calculating the seek range for a live stream, use the same hold-back logic
as when choosing a starting segment, including low-latency segments if
enabled. Permits seeking closer to the live edge when re-synching or catching
up.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:23 +00:00
Jan Schmidt
018a6192bd hlsdemux2: Include skipped segments in MSN calculation
When a playlist has skipped segments, increment the MSN to account for them so
the remaining segments end up with the right sequence numbers.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
55f6cd9243 hlsdemux2: Do a full playlist reload if delta fails
If we do a delta playlist request but then can't merge the result with the
existing playlist, retry with a full playlist request.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
703d29549a hlsdemux2: Add gst_hls_media_playlist_sync_skipped_segments()
Add a method that transfers over skipped segments from a reference playlist,
used to repopulate a delta playlist

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
7496d2750e hlsdemux2: Parse EXT-X-SKIP tag
Parse the attributes from the EXT-X-SKIP tag

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
c16366e5f3 hlsdemux2: Add gst_hls_media_playlist_get_next_msn_and_part()
Add a function that computes the media sequence number and/or part index that
are immediately after the end of the playlist, for use in blocking playlist
requests

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
5baf5f4b1e hlsdemux2: Add a timestamp to the playlist
Store the timestamp for this playlist. If valid it represents the monotonic time
at which the data was retrieved, minus any proxy cache Age field.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
90bedcb2bc hlsdemux2: Fix missed segment match for partial-only segment
Fix a case where the matching code might not select the final partial-only
segment because it has too short a duration (while it's still being created)

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
9edb2f6690 hlsdemux2: In live, match buffering to the hold back distance
When playing a live stream, make the recommended buffering threshold at most the
hold-back distance from live. If we start 3 seconds from the live edge, there's
no point trying to buffer more - we'll just hit the live edge and have to wait
for more data to be available anyway.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
1e6550f623 hlsdemux2: Resync stream time on partial segment boundaries
When resyncing stream times in a playlist, support at any partial segment
position, not just at full segment boundaries.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
5ca336226e hlsdemux2: Add preload equality helper
Add a helper function that compares two preload hints for equality based on URI
and requested byte range.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
401ca3ef44 hlsdemux2: Print playlist age in debug output
Store the timestamp when playlists are updated, and add some debug output to the
update_fragment_info that estimates how far from the live edge the fragment
currently is

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
43e042c4b7 hlsdemux2: Implement LL-HLS flag and part-hold-back/hold-back in live.
Add a flag to hlsdemux to enable or disable LL-HLS handling.

When LL-HLS is enabled and an LL-HLS playlist is loaded, use the part-hold-back
threshold to choose a starting segment.

For live streams that aren't LL-HLS, use the provided hold-back attribute, or
fall back to landing 3 segments from the end.

Make the gst_hls_media_playlist_seek() method able to choose a partial segment
within 2 target durations of the end of the playlist when requested.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00
Jan Schmidt
9848c1a1a1 m3u8demux2: Fix off-by-one and leak.
Fix an off-by-one in gst_hls_media_playlist_sync_to_playlist() that would ignore
the first fragment in the reference playlist.  The error was harmless, since we
expect the reference playlist to be older than the playlist we're
synchronising (so the first/oldest segment in the reference playlist will likely
not exist in the new playlist), so this is just for correctness.

Also fix a segment leak in gst_hls_media_playlist_advance_fragment() when
ignoring the partial_only segment.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
3537614c2b hlsdemux2: Add and use gst_hls_media_playlist_find_position()
Add a function for synchronising current position with the contents of a
playlist that is specifically for that and can handle synchronising to a partial
segment.

gst_hls_media_playlist_seek() will be used only when performing external seek
requests, to find the best segment or partial segment at which to resume
playback.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
c25814bac0 hlsdemux2: Add debug in find_segment_in_playlist()
In m3u8 segment matching, print the PDT that was matched between playlists.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
1b8af98208 hlsdemux2: Recalculate partial segments in anchor segment
When recalculating the partial segment stream times in
gst_hls_media_playlist_recalculate_stream_time(), don't miss the anchor segment
itself.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
e1a6ec22ee hlsdemux2: Dump init uri details for segments.
When dumping an m3u8 playlist to debug, include information about any
initialisation data.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
92e849070f hlsdemux2: Mark locations where partial segments need handling
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
9aa2497062 hlsdemux2: Note STABLE-RENDITION-ID is not handled
Add a comment that STABLE-RENDITION-ID is not yet parsed or used.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
e2750d4ae3 hlsdemux2: Calculate stream times for partial segments
When calculating stream times for segments, fill in the stream time fields on
any attached partial segments

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
3c50f54310 hlsdemux2: Implement preload hint parsing
Load EXT-X-PRELOAD-HINT into a preload_hints array in the media playlist

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
3ed6a23a4d hlsdemux2: Implement EXT-X-SERVER-CONTROL parsing
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
07f51396af hlsdemux2: Add parsing of partial segments
Add partial segments to each media segment, and potentially create a trailing
dummy segment if there are partial segments at the end of the playlist

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
fac7177354 hlsdemux2: make helper function for parsing times
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:21 +00:00
Jan Schmidt
9f89b8e3ef hlsdemux2/m3u8: Implement EXT-X-GAP parsing
Read the EXT-X-GAP tag and set is_gap on the segment.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3314>
2022-11-05 03:24:27 +11:00
Jan Schmidt
55db033570 hlsdemux2/m3u8: Refactor parsing for readability
Small readability improvements in the parsing code

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3314>
2022-11-05 03:24:27 +11:00
Jan Schmidt
4a8805ade7 hlsdemux2: m3u8: Use PDT to offset stream time when aligning playlist
When matching segments across playlists with Program-Date-Times,
use the difference in segment PDTs to adjust the stream time
that's being transferred. This can fix cases where the
segment boundaries don't align across different streams
and the first download gets thrown away once the PTS
is seen and found not to match.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3309>
2022-11-01 13:04:44 +00:00
Jan Schmidt
9b8c71d148 m3u8: Expose GstM3U8InitFile methods
Exposure ref/unref methods for the GstM3U8InitFile type,
and add a gst_m3u8_init_file_equal() comparison method.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3307>
2022-11-01 11:51:44 +00:00
Edward Hervey
33db765f45 adaptivedemux2: Improve minimum buffering threshold
Previously the minimum buffering threshold was hardcoded to a specific
value (10s). This is suboptimal this an actual value will depend on the actual
stream being played.

This commit sets the low watermark threshold in time to 0, which is an automatic
mode. Subclasses can provide a stream `recommended_buffering_threshold` when
update_stream_info() is called.

Currently implemented for HLS, where we recommended 1.5 average segment
duration. This will result in buffering being at 100% when the 2nd segment has
been downloaded (minus a bit already being consumed downstream)

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3240>
2022-10-31 16:16:50 +01:00
Edward Hervey
124f93a05d hlsdemux2: Fix crash on live playlist with single entry
If there is a single entry, we would end up computing a minimum distance of 0,
and would therefore read entries from after the segment array

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3024>
2022-09-14 15:14:08 +01:00
Jan Schmidt
a6eb725413 hlsdemux2: m3u8: Fix memory leaks on parsing
Fix memory leaks when parsing of an m3u8 file is
incomplete, with EXTINF or EXT-X-PROGRAM-DATE-TIME
directives, but no segment url.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2873>
2022-08-12 13:52:59 +00:00
Jan Schmidt
0ff317f107 hlsdemux2: m3u8: Fix memory leak
Clear the GValue holding intermediate GstStructure field
data.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2873>
2022-08-12 13:52:59 +00:00
Edward Hervey
6934362817 hlsdemux2: Always check DSN if required
We don't want to consider the candidate as being before the playlist if the DSN
don't match

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2839>
2022-08-04 14:49:27 +01:00
Edward Hervey
c20ad629c7 hlsdemux2: Allow DSN mismatches when re-syncing playlists
Some providers provide completely incompatible DSN across bitrates/renditions,
but do keep MSN consistent.

If we fail to synchronize playlist with DSN, retry without the DSN taken into
account.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2839>
2022-08-04 14:49:12 +01:00
Jan Schmidt
b2944c36ca hlsdemux2: Fix memory leaks
Clean up various memory leaks

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2676>
2022-06-29 14:33:30 +00:00
Edward Hervey
34a7710762 hlsdemux2: Fix debug return statement
Due to latest commits res could have been NULL.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2679>
2022-06-28 17:59:24 +00:00
Edward Hervey
82bd65e711 hlsdemux2: No longer re-add segments from before the playlist
When updating playlists, there is a possibility that the playlists don't
perfectly align, but the last entry of the previous playlist is *just* before
the first entry of the new playlist.

In those cases, we still can transfer the timing information from one playlist
to another, but we do not want to return that segment as being the matching one.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2679>
2022-06-28 17:59:23 +00:00
Edward Hervey
87ab729551 hlsdemux2: Detect synchronization loss
If we have been updating too slowly and have gone out of the current live
window, inform the baseclass accordingly.

This is different from the case where we have been updating quicker than what
the server provides.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2679>
2022-06-28 17:59:23 +00:00
Edward Hervey
8fd2dcd266 hlsdemux2: Add a new method to synchronize two media playlist
This allows transfering the stream time of the playlist to an updated
variant/rendition.

This allows updating that information without having a "current segment"

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2679>
2022-06-28 17:59:23 +00:00
Piotr Brzeziński
0a2c490723 adaptivedemux2: Prevent duplicate symbols on static builds
Uses prelude header files with #defines to rename DASH and MSS
symbols duplicated in their old standalone versions.
Also redefines soup-related functions when building it for
adaptivedemux2 to prevent symbol conflicts there.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2534>
2022-06-15 01:13:16 +00:00
Seungha Yang
238ce301b6 hlsdemux2: Adjust debug log level
HLS manifest might not be represented by a single common caps
when different codecs are mixed in a playlist, but it
does not seem to be a critical issue we need to warn.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2516>
2022-06-01 14:32:55 +00:00
Edward Hervey
964ee0299d hls/m3u8: Fix starting segment for live playlist
RFC 8216 6.3.3 "Playing the Media Playlist File" : states that for live media
playlists "the client SHOULD NOT choose a segment that starts less than three
target durations from the end of the Playlist file"

This is an off-by-one error. Since we are looking for the "index" of the
segment, we need to subtract 1 from the searched position.

Ex: For a playlist with 12 entries, we want to start playback on the 9th segment
... which is at index 8.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2259>
2022-04-22 08:06:27 +00:00
Edward Hervey
af78c16dd5 New HLS, DASH and MSS adaptive demuxer elements
This provides new HLS, DASH and MSS adaptive demuxer elements as a single plugin.

These elements offer many improvements over the legacy elements. They will only
work within a streams-aware context (`urisourcebin`, `uridecodebin3`,
`decodebin3`, `playbin3`, ...).

Stream selection and buffering is handled internally, this allows them to
directly manage the elementary streams and stream selection.

Authors:
* Edward Hervey <edward@centricular.com>
* Jan Schmidt <jan@centricular.com>
* Piotrek Brzeziński <piotr@centricular.com>
* Tim-Philipp Müller <tim@centricular.com>

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2117>
2022-04-18 14:11:23 +00:00