Commit graph

46 commits

Author SHA1 Message Date
Edward Hervey
084efebb2a hlsdemux2: Ensure processed webvtt ends with empty new line
Parsers downstream will use empty new lines to detect where an entry
ends. Failure to have a newline would cause the entry to be either
discarded or (wrongly) concatenated with the next entry

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2752

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4970>
2023-07-05 09:17:58 +01:00
Jan Schmidt
023c67e166 hlsdemux: Consider starting stream time in presentation offset
When calculating the presentation offset for CMAF input in live
playback, subtract the stream_time of the fragment from the
calculated presentation offset, so that the first fragment
is played at running time zero.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3680>
2023-01-05 07:08:16 +00:00
Enrique Ocaña González
aafe07a802 hlsdemux2: Expose EXT-X-PROGRAM-DATE-TIME as tags.
This allows an application to use timestamps associated
with fragments.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1417>
2022-11-17 22:11:12 +00:00
Jan Schmidt
565f47b4f3 adaptivedemux2: Move stream_seek() to the Stream class
Move the last stream specific vfunc from the demux
class to the stream class.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3314>
2022-11-05 04:00:31 +11:00
Jan Schmidt
2fe641353d adaptivedemux2: Refactor stream methods into the stream
Unlike the legacy elements, GstAdaptiveDemuxStream is a GObject now,
so a bunch of things that were actually stream methods on the
parent demux object can directly become stream methods now.

Move the stream class out to a header of its own.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3314>
2022-11-05 04:00:31 +11:00
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
6af3769511 hlsdemux2: Download new header when it changes
Check whether the init file / MAP data for a segment
is different to the current data and trigger an
update if so. Previously, the header would only
be checked in HLS after switching bitrate or
after a seek / first download.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3307>
2022-11-01 11:53:26 +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
fdfa70997b hlsdemux2: Handle negative time mappings
Some servers can return playlists with "old" media playlists and different
Discont Sequence.

In those cases, the segment stream times would be negative when creating a new
time mapping. In order to properly handle such scenarios, shift the values to
stored accordingly to end up with non-negative reference stream time.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3054>
2022-09-20 14:34:34 +00:00
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
025e446470 hlsdemux2: Fix reference leak of variant stream
When switching back to the previous variant stream
in gst_hls_demux_change_playlist(), fix a couple of
paths that would leak a reference to the previous
variant.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2873>
2022-08-12 13:52:59 +00:00
Jan Schmidt
9db19a3b06 hlsdemux2: Don't leak the datetime in time map structs
Add a function to clean up GstHLSTimeMap structs
and free the ref on the optional associated GDateTime

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2873>
2022-08-12 13:52:59 +00:00
Jan Schmidt
a242428532 hlsdemux2: Fix typefind leak and invalid memory access
When typefinding aggregates incoming data to a pending
typefind buffer and then succeeds in typefinding, it
leaks the aggregated buffer, and leaves the caller
accessing an unreffed buffer.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2873>
2022-08-12 13:52:59 +00:00
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
Jan Schmidt
edf84a7119 hlsdemux2: Requeue header buffer when restarting fragment
When returning GST_ADAPTIVE_DEMUX_FLOW_RESTART_FRAGMENT
for the first segment data, we might need to requeue the
header.

This was leading to occasional prerolling stalls on
HLS live streams with renditions.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2849>
2022-08-08 15:52:22 +00:00
Jan Schmidt
91e43048cf hlsdemux2: Fix buffer leak when resynching
Unref the buffer in gst_hls_demux_handle_buffer() when
returning GST_ADAPTIVE_DEMUX_FLOW_LOST_SYNC

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2849>
2022-08-08 15:52:22 +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
5d0b112c0c adaptivedemux2/hlsdemux2: Handle loss of sync when dowloading.
Media playlist updates and fragment downloads happen in an interleaved
fashion. When a media playlist update fails *while* a segment is being
downloaded, this means we lost synchronization.

Properly propagate and handle this

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2839>
2022-08-04 14:49:27 +01:00
Edward Hervey
6a9bdceb5e hlsdemux2: Fix initial playlist setup.
There is now only a single case where we setup the initial playlist to 0, which
is for the very first variant stream.

Rendition streams will have the initial playlist "synchronized" against the
variant stream media playlist.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2839>
2022-08-04 14:49:27 +01:00
Edward Hervey
9ca1dcd563 hlsdemux2: Handle loss of synchronization in live
Loss of synchronization happens when the updated media playlist has no
relationship to the previous ones. This could happen because of network issues,
server issues, etc...

When this happens, we take no chance and "reset" ourselves so that we can "seek
back to live" against the new updated playlists.

Since this happens at the "media playlist update" level, make sure the custom
flow return is propagated up.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2839>
2022-08-04 14:49:27 +01:00
Edward Hervey
1aab9db803 hlsdemux2: Prune time maps when possible
Add a new method to prune unused time mappings (i.e. which aren't used by any
current media playlist).

Do that when doing flushing seeks. Could be used in other places later too.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2839>
2022-08-04 14:49:21 +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
4b7622b377 hlsdemux2: Fix potential segfault
Fix a potential segfault if we receive a ISO-FF stream
with moof before moov.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2676>
2022-06-29 14:33:30 +00:00
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
Jan Schmidt
76e0333213 hlsdemux2: Free current_segment on finalize
Avoid a memory leak by making sure to release the
current segment on exit if non-NULL

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2676>
2022-06-29 14:33:30 +00:00
Edward Hervey
e9f8c7d33a hlsdemux2: Improve media playlist updates
* When dealing with rendition streams, we attempt to synchronize the media
  playlist against the variant stream. This helps with speeding up the correct
  initial fragment search and avoids issues when streams at activated at a much
  later time.
* Also add checks for variant stream existence before attempting to use them

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2679>
2022-06-28 17:59:24 +00:00
Edward Hervey
0a658840da hlsdemux2: Only seek on selected streams
When handling seeks, there is no need to seek on unselected streams. If they
later get activated they will be properly seek onto

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2679>
2022-06-28 17:59:24 +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
b9effe04e3 hlsdemux2: Use variant stream as support for synchronizing playlists
When matching playlists, there is a possibility that rendition streams will not
have been updated in time (for example because that stream started later, or
playback was paused). This would cause several playback failures and seeking
failures.

In order to still fall back on our feet, attempt to synchronize that rendition
playlist against the current variant playlist. This will attempt to match the
stream time using SN/DNS/PDT/...

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
9cdadf6d08 hlsdemux2: More improvement/fixes to position tracking
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2679>
2022-06-28 17:59:23 +00:00
Edward Hervey
5271603852 hlsdemux2: Fix position tracking
Remove the "pending advance" hack and instead rely on the base stream current
position to track our position (instead of a potentially NULL "current
segment").

Also ensure the media playlists are always refreshed with valid stream time,
even if there is no current segment.

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
Edward Hervey
74f25cca31 hlsdemux2: Look for mpegts synchronization point further
Some mpeg-ts streams have extra data at the beginning. While it's not ideal, we
should be able to cope with it.

Therefore increase the initial search window for at least 4 consecutive
synchronization points to 1kB.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2626>
2022-06-17 12:30:09 +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
Tim-Philipp Müller
9d9e59622f Bump GLib requirement to >= 2.62
Can't require 2.64 yet because of
https://gitlab.freedesktop.org/gstreamer/cerbero/-/issues/323

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2568>
2022-06-10 06:01:41 +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
Stéphane Cerveau
6b55f97529 adaptivedemux2: fix plugin/element init
In case of per features registration such as the
customizable gstreamer-full library, each
element should check that the soup library can be loaded to
facilitate the element registration.

Initialize the debug categories properly

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2348>
2022-05-30 13:13:48 +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
8f2d347559 hls: Relax webvtt checks
If no hour field is present (which is allowed), the remaining data can be less
than 15 character.

Fix time translation failures if the hour field wasn't present

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2248>
2022-04-20 17:47:00 +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