Commit graph

21 commits

Author SHA1 Message Date
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
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
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
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
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
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
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
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
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