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Author SHA1 Message Date
Jan Schmidt 874b665710 hlsdemux2: Fill in skipped segments if possible 
After reloading a playlist using a delta request, use the previous playlist to
fill in skipped segments if possible.

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 8a0190b521 hlsdemux2: Use skip and blocking playlist delivery directives 
Detect when we can use a blocking request and delta playlist update requests and
add the required delivery directives to the request URI.

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 d41def562c hlsdemux2: Use stream llhls_enabled flag 
Use the stream's copy of the llhls_enabled flag when deciding whether to do
preload requests - the value that was cached when the stream started

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt 42b0dd8c41 hlsdemux2: Split the stream object out 
Move the stream object to a separate file to split the demux level behaviour
from the stream behaviour better.

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 a3770523c0 adaptivedemux2/downloadrequest: add a helper to retrieve the Age header 
Add a method to look at HTTP response headers and parse and return any Age
header, provided by caching proxy servers if the data was provided from a cache.

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 bdec75f9dc hlsdemux2: Calculate / transfer timing info for preloads 
When fulfilling data requests, transfer timing information so the stream can
calculate data bitrates.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt 5192181ef5 adaptivedemux2: Add most recent data time and offset helper 
Add a field to the DownloadRequest that reports the most recent time at which
data arrived. Update it in the DownloadHelper.

Add a method to retrieve the GST_BUFFER_OFFSET() for the DownloadRequest's data
buffer (if any).

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt 40938c8853 adaptivedemux2: Handle another case in download_request_take_buffer_range 
Handle the case where we want to get a range from the available data that
doesn't start at the first available byte (and discard the bytes before that
start offset).

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt cbb9cfe987 hlsdemux2: Cancel preload before fetching something else 
When submitting a request for fragment or header that doesn't match any preload,
make sure there's not an ongoing preload for that data type, to avoid parallel
downloads using up bandwidth.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt 70bfeff35d hlsdemux2: Fix assertion on shutdown 
After cancelling a DownloadRequest, the download helper may not do so
immediately, so we can't assert on the in_use flag. Also, since there's no
refcount on the preload hint struct in the download request callback data, make
sure no callbacks will be dispatched when we're going to free the preload hint
struct.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt 44107d0c4b hlsdemux2: Implement the stream submit_request() vfunc 
Implement the submit_request() vfunc for streams and fulfil requests from the
preload hint data if possible.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt a7e5236a39 hlsdemux2/preloader: Implement basic request handling 
Implement fulfilment of HTTP requests from the active preload downloads by
finding any preload request that can provide the requested data and feeding
bytes from the internal DownloadRequest to the caller provided target
DownloadRequest.

Doesn't yet calculate timestamps to make the target request have a sensible
apparent bitrate.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt 940811d593 adaptivedemux2/downloadrequest: Add new methods 
Add download_request_take_buffer_range() and
download_request_get_bytes_available() methods.

download_request_take_buffer_range() takes bytes from the front of the request
that satisfy the requested start/end byterange, and puts any remaining bytes
back into the DownloadRequest

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt 76565e8979 adaptivdemux2: Improve a comment about unlocking download requests. 
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt a14f4f7054 adaptivedemux2: Make download mechanism overrideable 
Make the mechanism by which DownloadRequests are fulfilled overrideable by the
subclass, in case it has an internal mechanism it can use (such as blocking
preloads in HLS)

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt cb27c05ca7 hlsdemux2: Add preloader helper. 
Add a helper that submits and handles blocking preload requests for future
PART/MAP data from live playlists. Add handling in the hlsdemux stream to submit
preload requests when hitting the end of the available segments in a live
playlist.

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 30bc72d6c7 adaptivedemux2: Define RFC8673_LAST_BYTE_POS 
Define the recommended value from RFC8673 for the last byte of an open-ended
range request intended to invoke chunked blocking downloads of an incrementally
created resource.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:22 +00:00
Jan Schmidt 61516eadf6 hlsdemux2: Ignore partial segments when not live 
Add some checks that LL-HLS support is enabled and that the current playlist is
live before proceeding to play any partial segments.

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 676fffd23c hlsdemux2: Fix segment advance on partial segments. 
Fix the duration passed to gst_adaptive_demux2_stream_advance_fragment() when
advancing from a partial segment.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:21 +00:00
Jan Schmidt e318bc3df5 hlsdemux2: Improve some debug output 
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 857541ae07 hlsdemux2: Fix some m3u8 segment leaks 
Make sure unref m3u8 segments in some missed paths.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:21 +00:00
Jan Schmidt 7b9547a119 hlsdemux2: Allow starting at 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 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 2c82fdf276 hlsdemux2: Use gst_hls_media_playlist_recalculate_stream_time() 
Instead of recalculating stream times manually in a playlist, let the playlist
do it, so that it fixes up partial segment stream times too.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:21 +00:00
Jan Schmidt d76aacfb82 hlsdemux2: LL-HLS improvements 
Fixes for stream_time recalculation and handling in partial segments.

Disallow bitrate switching when in the middle of partial segments - only at a
full segment (or right before the first partial segment of a segment).

It's possible but more difficult to switch bitrates in the middle of a partial
segment group, since they are less likely to have aligned keyframes. In any
case, the seek code can't do that right now.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:21 +00:00
Jan Schmidt b6abe94890 hlsdemux2: Continue implementing LL-HLS support 
Somewhat working support for proceeding into the partial segments appearing at
the live edge of the playlist.

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 cfc62a69f7 hlsdemux2: Start adding partial_segment 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 43a8d45ac6 hlsdemux2: Add unit test for parsing LL-HLS playlist 
Test parsing of partial segments (EXT-X-PART, EXT-X-PART-INF) and preload
hints (EXT-X-PRELOAD)

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
Edward Hervey 4e946890b2 adaptivedemux2: Global output position is always positive 
Change to non-signed GstClockTime for tracking

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
 2023-02-03 16:52:21 +00:00