Commit graph

97 commits

Author SHA1 Message Date
Edward Hervey
f1fdbfc5bd m3u8: Make a debug function usable elsewhere
The rest of the code might want to use this

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1757>
2020-11-11 04:06:05 +00:00
Seungha Yang
f9dc67c372 hls: m3u8: Parsing EXT-X-MAP tag to store initialization data
EXT-X-MAP tag informs media initialization data,
such as moov box in ISOBMFF case and PAT/PMT for MPEG TS stream.

https://bugzilla.gnome.org/show_bug.cgi?id=776928
2019-06-18 07:14:28 +00:00
Hosang Lee
6a5bae5343 m3u8: Parse and use AVERAGE-BANDWIDTH attribute if available
The AVERAGE-BANDWIDTH attribute in the EXT-X-STREAM-INF tag represents
the average segment bit rate of the Variant Stream, while the BANDWIDTH
attribute represents the peak segment bit rate of the Variant Stream.
(https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.4.2)
Using the average bit rate instead of the peak bit rate for variant switching
is more efficient and appropriate. Sometimes due to VBR encoding,
the BANDWIDTH may represent a value way above the average bit rate,
which could result to players not switching to that variant stream
 although network bandwidth is sufficiently available.

https://bugzilla.gnome.org/show_bug.cgi?id=790821
2017-12-06 15:02:40 -05:00
Edward Hervey
c92694e12a hls: Don't leak mutex 2017-11-25 13:10:11 +01:00
Jan Alexander Steffens (heftig)
519ead2462 m3u8: Refine sequence update debug messages
Actually give some details about why it failed.

https://bugzilla.gnome.org/show_bug.cgi?id=788417
2017-10-19 15:47:04 +02:00
Jan Alexander Steffens (heftig)
7690a4a521 m3u8: Don't try to match URIs when we have media sequences
It is legal for a stream to reuse segments (marking discontinuities as
needed). Uplynk delivers such playlists for their placeholder loops.

Leave the URI scanning in place for playlists which have no
EXT-X-MEDIA-SEQUENCE tag. This should be harmless since the spec
requires these playlists to not be missing segments (RFC8216 6.2.2),
so we should be always matching on the first segment.

https://bugzilla.gnome.org/show_bug.cgi?id=788417
2017-10-19 15:47:04 +02:00
Jan Alexander Steffens (heftig)
025633b162 m3u8: Ignore empty playlists in check_media_seqnums
Let these error in the immediately following check in gst_m3u8_update.

https://bugzilla.gnome.org/show_bug.cgi?id=788417
2017-10-19 15:47:03 +02:00
Jan Alexander Steffens (heftig)
f80ad048e6 m3u8: Split gst_m3u8_update_check_consistent_media_seqnums
The function was basically one big if-else. Move the branch to the
one caller.

Currently, it's never called with previous_files == NULL. Assert that
this continues.

https://bugzilla.gnome.org/show_bug.cgi?id=788417
2017-10-19 15:47:03 +02:00
Jan Alexander Steffens (heftig)
234a8ecc50 m3u8: Simplify control flow for sequence update
Split the tail from the rest of the loop.

https://bugzilla.gnome.org/show_bug.cgi?id=788417
2017-10-19 15:47:02 +02:00
Seungha Yang
b8344ea997 m3u8: Fix parsing EXT-X-DISCONTINUITY
EXT-X-DISCONTINUITY tag should have no trailing ":" character

https://bugzilla.gnome.org/show_bug.cgi?id=780179
2017-03-17 12:13:40 +02:00
Seungha Yang
16dd0e693d m3u8: Release m3u8 lock if consistent checking failed
To fix deadlock during live m3u8 update

https://bugzilla.gnome.org/show_bug.cgi?id=780180
2017-03-17 12:13:40 +02:00
Matthew Waters
fd8d35298f Revert "adaptivedemux: answer duration queries for live streams"
Completely disabling duration reporting with live streams is not cool.

This reverts commit e1b68d9a65.

https://bugzilla.gnome.org/show_bug.cgi?id=753879
2017-03-14 16:50:30 +11:00
Seungha Yang
5bd4bc8080 hls: Fix various leak on hlsdemux and m3u8
* default_variant should be freed, it holds ref.
* GstHLSMedia holds GstM3U8 ref.
* gst_m3u8_get_next_fragment() increases ref count.

https://bugzilla.gnome.org/show_bug.cgi?id=778073
2017-03-02 20:24:00 +02:00
Alex Ashley
e1b68d9a65 adaptivedemux: answer duration queries for live streams
For duration queries on live streams, adaptivedemux ignores the query.
The problem then is that the query is answered by the downstream
qtdemux element, with the duration of the currently passing fragment.

This commit changes the behaviour of adaptivedemux to answer the duration
queries for live streams, returning GST_CLOCK_TIME_NONE.

    https://bugzilla.gnome.org/show_bug.cgi?id=753879
2017-03-02 19:54:04 +02:00
Thomas Bluemel
9ce5646a0f hlsdemux: Add support for EXT-X-DISCONTINUITY-SEQUENCE
https://bugzilla.gnome.org/show_bug.cgi?id=772811
2017-03-02 19:05:57 +02:00
Sebastian Dröge
95b85eae5a hlsdemux: Compare media type of the correct variable that is actually set
CID 1364752
2017-02-28 15:31:53 +02:00
Seungha Yang
b5cf96fc35 hls: m3u8: Set sequence position for live
hls live starts playback from the allowed latest fragment,
but its "sequence position" is set to zero, and so stream
time is also set to zero.

This does not make sense, because hls live allows seeking to past position,
and it's negative stream time from downstream element's point of view.
Note that, allowed seekable range (and seeking query) is
from the first fragment of playlist to the allowed latest fragment.

https://bugzilla.gnome.org/show_bug.cgi?id=777682
2017-01-31 13:23:34 +02:00
Seungha Yang
de86258c94 hls: Exclusion of last three fragment in case of live playback
HLS spec 6.3.3 is saying that
"the client SHOULD NOT choose a segment which starts less than
three target durations from the end of the Playlist file."

To ensure above statement, the third fragment from the end of playlist
should be excluded from seekable range and also from available starting fragment.
(i.e., the fourth fragment from end of playlist is the starting fragment).

https://bugzilla.gnome.org/show_bug.cgi?id=777682
2017-01-31 13:23:34 +02:00
Sebastian Dröge
075ceffd9b hlsdemux: Detect media sequence number inconsistencies and fail
Without failing, we would play back random parts of the stream which is
arguably a worse user experience, and failing is also recommended by the
spec here.

And also handle live streams without any media sequence numbers at all
properly, that is, make sure the sequence numbers are increasing instead
of starting again at 0 every time.

https://bugzilla.gnome.org/show_bug.cgi?id=775665
2017-01-18 13:36:16 +02:00
Sebastian Dröge
674efaadd9 m3u8: Mark uri_join() function as static
We don't really want to export this, especially not without any
namespacing. This can cause problems for static builds.
2016-11-28 10:49:23 +02:00
Sebastian Dröge
cff42b2b40 hlsdemux: Fix NULL pointer dereference when checking if there is a next fragment
Thanks to Aleksandr <tumaleksandr@yandex.ua> for reporting and
suggesting the fix.

https://bugzilla.gnome.org/show_bug.cgi?id=774287
2016-11-12 10:39:11 +02:00
Jan Schmidt
d78686f7d4 hls: Avoid coverity warning about access off the end of an array.
Fixes CID 1364755
2016-08-04 22:22:44 +10:00
Luis de Bethencourt
2ed4135237 hls: m3u8: remove impossible condition
After the check in line 1,111,  media->uri can't be NULL. So the two checks
for GST_HLS_MEDIA_TYPE_CLOSED_CAPTIONS are the same, removing the redundant
one which goes to cc_unsupported.

CID 1364752
2016-08-04 11:17:56 +01:00
Jan Schmidt
f3397e0d54 hlsdemux: Choose the default variant and track it when updating
Modify playlist updating to track information across updates
better, although still hackish.

When connection_speed == 0, choose the default variant
not the first one in the (now sorted) variant list, as that
will have the lowest bitrate.
2016-08-03 23:49:54 +10:00
Tim-Philipp Müller
4df6f1ee93 hlsdemux: move variant list handling over to new master playlist code
Adapt hlsdemux for the m3u8 playlist changes.
2016-08-03 23:49:54 +10:00
Tim-Philipp Müller
f0fcf1d718 hls: m3u8: Rework m3u8 parsing and storage.
Make M3U8 and GstM3U8MediaFile refcounted. The contents
of it and GstM3U8MediaFile are pretty much immutable
already, but if we make it refcounted we can just
return a ref to the media file from _get_next_fragment()
instead of copying over all fields one-by-one, and then
copying them all into the adaptive stream structure fields again.

Move state from client into m3u8 structure.  This will
be useful later when we'll have multiple media playlists
being streamed at the same time, as will be the case with
alternative renditions.

This has the downside that we need to copy over some
state when we switch between variant streams.

The GstM3U8Client structure is gone, and main/current
lists are not directly in hlsdemux. hlsdemux had as
many CLIENT_LOCK/UNLOCK as the m3u8 code anyway...
2016-08-03 23:49:54 +10:00
Alex Ashley
f6bff8f5f5 hlsdemux: unquote all the quoted-string attributes
The URI attribute from the EXT-X-KEY tag and the URI attribute from the
EXT-X-I-FRAMES-ONLY tag are both quoted-string attibutes that have their
quotation marks removed during parsing. The CODECS attribute of the
EXT-X-STREAM-INF is also a quoted-string attribute, but this attribute
was not being un-quoted.

This commit changes the parser to always unquote all quoted-string
attributes and adjusts the unit tests to this new bevahiour for the
CODECS attribute.

An additional test is added to check that parsing of all of the fields
in the EXT-X-STREAM tag is correct, including those that contain comma
characters.

https://bugzilla.gnome.org/show_bug.cgi?id=758384
2015-12-22 11:15:32 -03:00
Sebastian Dröge
821320fbc4 hlsdemux: Resync live playlists to the 3rd newest fragment if we fall off the playlist
As HLS does not provide any way of knowing the server's clock, and we do
buffering of "live" streams, at some point we will fall behind the server in
many cases and would have to advance to a fragment that is not in the playlist
anymore.

Previously we would've just resynced to the next oldest fragment that is still
there, but this causes problems as from this point onwards we would always
fall off the playlist again all the time.
Instead we now resync and move to the 3rd newest fragment like we would do
when starting playback of a live stream.

https://bugzilla.gnome.org/show_bug.cgi?id=758987
2015-12-04 18:06:30 +02:00
Tim-Philipp Müller
fe1923e1e6 hls: m3u8: remove superfluous gst_m3u8_copy() implementation
No need to implement _copy() when we just copy a list that
we're freeing three lines later anyway. Instead just steal
the new main list.
2015-12-03 18:25:12 +00:00
Alex Ashley
0745d567a7 hlsdemux: correct the calculation of seek range of non-live streams
The seek range calculation for on-demand streams was incorrectly
excluding the last three segments of the stream. This three segment
rule should only be applied to live streams [1].

[1] https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-6.3.3

https://bugzilla.gnome.org/show_bug.cgi?id=758386
2015-12-02 10:16:25 +02:00
Tim-Philipp Müller
97ea56e91c hls: m3u8: remove pointless client_has_main() function
We always have a main list.
2015-12-01 17:51:34 +00:00
Tim-Philipp Müller
0ed4620033 hls: m3u8: remove unused _get_current_fragment_duration() function 2015-12-01 17:51:34 +00:00
Tim-Philipp Müller
e68914eeec hls: m3u8: remove unused m3u8 client update_failed_count field 2015-12-01 17:51:34 +00:00
Tim-Philipp Müller
5443cca406 hls: m3u8: remove helper var that's only used during parsing from structure
Just keep that local to the parsing function.
2015-12-01 17:51:34 +00:00
Tim-Philipp Müller
efe62292a3 hls: rename plugin from fragmented to hls 2015-12-01 17:51:34 +00:00
Tim-Philipp Müller
3015cd75e4 hls: m3u8: don't leak GList nodes when matching up variant lists after master list update 2015-11-06 00:48:42 +00:00
André Draszik
e0b4290998 hlsdemux: don't crash or leak memory on broken master playlist
If a (master) playlist contains a variant list entry without a
URI then during parsing of the next variant list entry we are
a) leaking the entry we're currently parsing (new_list), and
b) free'ing the pointer to the previous list entry (list) without
   updating the pointer.

Hence when then adding the URI for the latest parsed entry, incorrect
information is stored, as the information is used from 'list' which
is not valid memory anymore, also leading to crashes.

Fix this by correctly storing the new variant list entry pointer
as needed.

https://bugzilla.gnome.org/show_bug.cgi?id=756861
2015-10-25 09:26:34 +00:00
Tim-Philipp Müller
1c8d844ece hlsdemux: m3u8: move file lookup by sequence directly into code
Nicer to read, two lines of code less, and also the callback
function should've been a GCompareFunc that returns a gint
and not a boolean (it did work correctly, was just confusing).
2015-10-23 18:20:01 +01:00
Tim-Philipp Müller
28ac033773 hlsdemux: m3u8: clean-up: remove unused argument in function call 2015-10-23 18:19:55 +01:00
Edward Hervey
f7c4bb5ac6 hls/m3u8: Update current position in all cases
In order to ensure the sequence_position will always be consistently updated,
store the current file duration.

This way, when we advance, we can always increment the position based on what
was previously outputted.

https://bugzilla.gnome.org/show_bug.cgi?id=752132
2015-10-19 14:45:42 +02:00
Thiago Santos
d5f79b8529 hls: if media sequence is not specified, use 0
Allows playlists that are missing the mediasequence information to
be correctly parsed. If the playlist was updated without reseting
the mediasequence it would constantly increase over subsequent updates,
leading to issues during playback.
2015-10-14 21:33:27 -03:00
Edward Hervey
0e663fca94 hls: Allow debugging of the playlist
Helps debugging issues
2015-10-14 18:01:04 +02:00
Sebastian Dröge
f5dd41d710 Update GLib dependency to 2.40.0 2015-10-02 22:24:19 +03:00
Tim-Philipp Müller
536e3742aa Fix file permissions of some files 2015-08-28 19:55:59 +01:00
Athanasios Oikonomou
22456ce032 hlsdemux: select correct position for live streams that don't remove fragments
Some live streams (eg youtube) don't remove fragments in order to allow
seeking back in time (live + vod).

When gst_m3u8_client_has_next_fragment is called, we are getting wrong fragment
because current_file points in first file of the fragments list resulting in
watching the stream from the beginning again.

This patch sets current_file to nth fragment for live streams, then on
gst_m3u8_client_has_next_fragment will keep up with the live stream.

https://bugzilla.gnome.org/show_bug.cgi?id=753344
2015-08-26 12:11:57 +03:00
Thiago Santos
bc33d22635 hlsdemux: don't warn about duration if it is not known
And also print the values in case of warning
2015-08-07 11:24:52 -03:00
Thiago Santos
2ed8a819f6 hlsdemux: demote error to warning
It is not fatal and can be quite normal when the network is
too slow
2015-07-24 10:09:19 -03:00
Thiago Santos
581d8c0b8d Revert "hlsdemux: Simplify logic in process_manifest"
This reverts commit 4ca3a22b6b.

The connection-speed=0 is used as a special value in the property
of hlsdemux to mean 'automatic' selection, m3u8.c doesn't need
to know about that as it should be as simple as possible.

So this patch hides this automatic selection documented in hlsdemux
into m3u8 logic and I think the gets harder to understand the code.

It also makes the hlsdemux unit tests work again

https://bugzilla.gnome.org/show_bug.cgi?id=749328
2015-06-05 09:43:10 -03:00
Edward Hervey
04b010a883 hlsdemux: Search more when advancing fragment
In live situations, it is not uncommon for the current fragment to end
up out of the (updated) play range (lowest/highest sequence). But the next
fragment to play *is* present in the play range.

When advancing, if we can't find the current GstM3U8MediaFile, don't abort
straight away. Instead, look if a GstM3U8MediaFile with the next sequence value
is present, and if so switch to it.

https://bugzilla.gnome.org/show_bug.cgi?id=750028
2015-05-28 14:56:36 +02:00
Jimmy Ohn
4ca3a22b6b hlsdemux: Simplify logic in process_manifest
Simplify logic in process_manifest and remove a TODO item.

https://bugzilla.gnome.org/show_bug.cgi?id=749328
2015-05-18 10:52:35 +03:00