Commit graph

97 commits

Author SHA1 Message Date
Sebastian Dröge
5fd2fc3050 hlsdemux: Don't error out if we can't match variant playlists after updating
It's better to just select some random variant playlist instead of stopping,
chances are that it's still continuing to work and we might just have to
select a different variant again later.
2015-04-23 17:47:18 +02:00
Alex Ashley
a08dd85608 hlsdemux: select correct starting position for live streams
When playing live HLS streams, the media playback starts from the
beginning of the media playlist. When playing a live HLS stream,
media playback should start from 3 fragments from the end of the
playlist.

See section 6.3.3. of the HLS draft [1]

This commit changes the logic to select 3 fragments from the end when
playing a live stream.

[1] http://tools.ietf.org/html/draft-pantos-http-live-streaming-12#page-29

https://bugzilla.gnome.org/show_bug.cgi?id=727742
2015-02-20 19:00:01 -03:00
Thiago Santos
d310c0c460 hlsdemux: cache current file position in the list
Avoids iterating the list everytime to look for the next segment
to be used (or to advance to the next one).
2015-01-08 17:55:33 -03:00
Thiago Santos
308b2e5aaf hlsdemux: simplify next segment checking functions
Optimize loop by moving condition outside of it and reuse the
find_next_fragment function to check if there is next instead of
replicating the same loop
2015-01-08 17:55:33 -03:00
Thiago Santos
e21abb62e0 hlsdemux: cache total duration to avoid iterating at every query
Duration queries can be done a few times per second and would cause
the segment list to be traversed for every one. Caching the duration
prevents that.
2015-01-08 17:55:33 -03:00
Luis de Bethencourt
9dcf650a17 hlsdemux: g_return_if_fail in function with return type
Need to use g_return_val_if_fail() when the function returns a type, in this
case a gboolean
2015-01-08 15:54:18 +00:00
Thiago Santos
dd7cb8f632 hlsdemux: implement _has_next_fragment to avoid busy looping
It will allow the demuxer to wait for a fragment to be available instead
of busy looping polling the playlist for a new fragment
2015-01-08 09:59:01 -03:00
Thiago Santos
3a6c2b6b67 hlsdemux: remove duplicate call to uri_join 2015-01-07 10:23:31 -03:00
Thiago Santos
3e9b89111a hlsdemux: skip checking '#EXT-X-' token for all entries
Put this common check before to avoid repeating it for all possible
entries to save some cycles
2015-01-07 09:39:56 -03:00
Thiago Santos
c79e8a78ac hlsdemux: avoid using g_list_append for creating segments list
Use g_list_prepend and reverse it at the end to skip traversing the
same list for every new segment
2015-01-07 09:30:40 -03:00
Alex Ashley
50b5d94b2a hlsdemux: Implement live seeking
hlsdemux assumes that seeking is not allowed for live streams,
however seek is possible if there are sufficient fragments in the
manifest. For example the BBC have live streams that contain 2 hours
of fragments.

The seek code for both live and on-demand is common code. The
difference between them is that an offset has to be calculated
for the timecode of the first fragment in the live playlist.

When hlsdemux starts to play a live stream, the possible seek range
is between 0 and A seconds. After some time has passed, the beginning of
the stream will no longer be available in the playlist and the seek
range is between B and C seconds.

Seek range:
start          0 ........... A
later               B ........... C

This commit adds code to keep a note of the B and C values
and the highest sequence number it has seen. Every time it updates the
media playlist, it walks the list of fragments, seeing if there is a
fragment with sequence number > highest_seen_sequence. If so, the values
of B and C are updated. The value of B is used when timestamping
buffers.

It also makes sure the seek range is never closer than three fragments
from the end of the playlist - see 6.3.3. "Playing the Playlist file"
of the HLS draft.

https://bugzilla.gnome.org/show_bug.cgi?id=725435
2015-01-05 17:59:08 -03:00
Thomas Bluemel
c87835a79f hlsdemux: Fix accessing invalidated memory
In gst_hls_demux_get_next_fragment() the next fragment URI gets
stored in next_fragment_uri, but the gst_hls_demux_updates_loop()
can at any time update the playlist, rendering this string invalid.
Therefore, any data (like key, iv, URIs) that is taken from a
GstM3U8Client needs to be copied. In addition, accessing the
internals of a GstM3U8Client requires locking.

https://bugzilla.gnome.org/show_bug.cgi?id=737793
2014-10-07 15:22:27 +03:00
Sebastian Dröge
46b0310acd hlsdemux: Properly assign offsets to the files if we accumulate them instead of reading from the playlist 2014-09-04 17:49:23 +03:00
Tim-Philipp Müller
309395ed4d hls: fix build with GLib 2.32
Provide internal copy of g_list_copy_deep() until we
bump the GLib requirement.

https://bugzilla.gnome.org/show_bug.cgi?id=731555
2014-06-12 10:17:10 +01:00
Damian Ziobro
be28578942 hlsdemux: Improve parsing quoted key URIs and apply it for I-frame-based stream URI
https://bugzilla.gnome.org/show_bug.cgi?id=730830
2014-06-06 13:13:56 +03:00
Sebastian Dröge
37ffe063f6 hlsdemux: Don't store the current key in the playlist
It's per fragment and applying to all following fragments
until the next key is specified.
2014-06-06 13:08:04 +03:00
Sebastian Dröge
008edeadae hlsdemux: Fix compiler warnings 2014-06-06 13:04:04 +03:00
Thomas Bluemel
babd8969f2 hlsdemux: Reload the variant playlist if refreshing a playlist or downloading a fragment fails
This can happen if the playlists have moved due to the variant playlist
now being redirected to another target. This currently only works as long
as the referenced playlists don't change in relation to the variant
playlist, and the new location is purely due to a new path triggered by a
new redirection target of the variant playlist, or a new redirection
target of the playlist itself.

https://bugzilla.gnome.org/show_bug.cgi?id=731164
2014-06-06 13:02:47 +03:00
Damian Ziobro
5ca7684b7d hlsdemux: Make parsing of "-quoted key URIs more resilient
https://bugzilla.gnome.org/show_bug.cgi?id=730830
2014-05-28 10:58:21 +02:00
Sebastian Dröge
2f39a3d711 hlsdemux: Always use the redirect target to resolve relative URIs
But redownload the playlists from the original URI if it's not
a permanent redirect.
2014-05-28 10:19:40 +02:00
Damian Ziobro
5b547a553d hlsdemux: Fix storing of the IV based on the media sequence number
https://bugzilla.gnome.org/show_bug.cgi?id=730574
2014-05-22 13:27:37 +02:00
Sebastian Dröge
951bb53057 hls: Remove invalid free
data does not have to be freed at all here, it's a pointer to
an arbitrary position inside the current line. Also don't reuse
the data variable for anything else, that will cause crashes
in playlists that have the I-frame playlist URI followed by
other attributes.

CID 1212127
2014-05-09 15:30:00 +02:00
Sebastian Dröge
816000f726 hls: Store allowcache playlist field in a boolean 2014-05-05 09:41:51 +02:00
Vincent Penquerc'h
a78e516cbf hls: restore NULL test mistakenly removed
Thanks to tpm for point out I'm an idiot.
2014-04-08 17:10:27 +01:00
Vincent Penquerc'h
45b8225a02 hls: bring NULL test before dereference
Coverity 1195168
2014-04-08 16:46:56 +01:00
Sebastian Dröge
8109ed8785 hlsdemux: Fix forwards and backwards searching in the files list 2014-03-29 10:33:45 +01:00
Sebastian Dröge
91ec00a0c0 hlsdemux: Implement trick modes via I-frame variant lists 2014-03-29 10:33:45 +01:00
Sebastian Dröge
77231ab957 hlsdemux: Implement parsing of #EXT-X-I-FRAME-STREAM-INF
These are I-frame-only variant lists that can be used
for trick mode playback.
2014-03-29 10:33:45 +01:00
Sebastian Dröge
bd54a212d3 hlsdemux: Fix comparison in bitrate selection 2014-03-09 20:50:44 +01:00
Sebastian Dröge
c9bb878fe5 m3u8: Fix off-by-one in the download range end 2014-03-07 16:24:19 +01:00
Sebastian Dröge
cd02546089 hlsdemux: Implement handling of byte ranges 2014-03-06 16:36:10 +01:00
Sebastian Dröge
0a32c5f7a4 hlsdemux: Implement proper handling of discontinuities
It's not really correct yet for seeks but better than what
we had before.

See https://bugzilla.gnome.org/show_bug.cgi?id=695846
2014-03-01 17:15:54 +01:00
Alex Ashley
b7ef52c515 hlsdemux: Segfaults if playlist has no media files
hlsdemux causes a null pointer dereference if the media playlist
does not contain any media files. The gst_m3u8_client_get_duration
function assumes that demux->client->current->files is valid when
computing duration.

gst_m3u8_client_update needed to be modified to check for the
case of downloading an M3U8 file that doesn't contain any media
files, and returning an error to gsthlsdemux.c

This bug can be reproduced by creating a master m3u8 file that
contains one media playlist that points back to the master m3u8
file.  For example create a file called bug725134.m3u8:
  #EXTM3U
  #EXT-X-VERSION:4
  #EXT-X-STREAM-INF:PROGRAM-ID=1, BANDWIDTH=1251135, CODECS="avc1.42001f mp4a.40.2", RESOLUTION=640x352
  bug725134.m3u8

https://bugzilla.gnome.org/show_bug.cgi?id=725134
2014-03-01 16:34:59 +01:00
Alex Ashley
161254d7c0 hlsdemux: Fix parsing of CODECS and RESOLUTION
hlsdemux does not check for the '"' character in #EXT-X-STREAM-INF
attributes. The CODECS parameter is an example of an attribute
that might use the '"' symbol and might contain a ',' character
inside this quoted string.

For example: CODECS="avc1.77.30, mp4a.40.2"

hlsdemux does not correctly parse the RESOLUTION attribute, it
assumes that an '=' character is used to delineate the width
and height values, but the HLS RFC states that a 'x' character
must be used as the delimiter between width and height.

https://bugzilla.gnome.org/show_bug.cgi?id=725140
2014-02-26 09:23:22 +01:00
Alex Ashley
91775a1abd hlsdemux: Fix for URLs that contain a '/' in the query parameter
If the URL for the master manifest files contains a '/' character
in the query parameter (for example
http://example.net/1054559_h264_1500k.mp4/master.m3u8?acl=/*1054559_h264_1500k.mp4),
hlsdemux is incorrectly converting the relative URLs of the media
playlists in to absolute URLs. It is incorrectly using the last '/' it
finds in the URL. According to RFC3986 the '/' character is allowed in
the query part of the URL.

https://bugzilla.gnome.org/show_bug.cgi?id=725137
2014-02-26 09:20:58 +01:00
Sebastian Dröge
b3a7242910 hlsdemux: Keep track of timestamps by adding them up during playback
...instead of adding them from the start of playlist every time. This
among other things fixes timestamps for live streams, where the playlist
is some kind of ringbuffer of fragments and thus adding from the beginning
of the playlist will miss the past fragments.

https://bugzilla.gnome.org/show_bug.cgi?id=724983
2014-02-23 15:18:22 +01:00
Sebastian Dröge
a51116add3 hlsdemux: Refactor threading and downloading
We now download fragments as fast as possible and push them downstream
while another thread is just responsible for updating live playlists
every now and then.

This simplifies the code a lot and together with the new buffering
mode for adaptive streams in multiqueue makes streams start much faster.

Also simplify threading a bit and hopefully make the GstTask usage safer.
2014-02-23 00:10:45 +01:00
Sebastian Dröge
e40b72bc9b hlsdemux: Ignore empty lines in the playlist
Based on a patch by Andoni Morales.
2014-02-12 18:50:09 +01:00
Sebastian Dröge
65c1faf553 hlsdemux: Make sure to ignore \r in line endings in every case 2014-02-12 18:47:45 +01:00
Arnaud Vrac
6e54b8ee53 hlsdemux: schedule next update based on the fragment duration 2014-02-12 15:18:29 +01:00
Sebastian Dröge
dc45d236d2 hlsdemux: Use g_ascii_xdigit_value() instead of our own version of it 2014-02-12 14:10:02 +01:00
Sebastian Dröge
5e55bae14b hlsdemux: Don't try decryption if an unsupported method is found 2014-02-11 18:15:45 +01:00
Sebastian Dröge
56faad51bb hlsdemux: Properly parse IV from the playlist
Without this every fragment's first 16 bytes will be corrupted
if not the fallback IV is used by the playlist.
2014-02-11 18:15:07 +01:00
Sebastian Dröge
a4847fd4db hlsdemux: Actually store doubles as such and don't truncate them to ints
Fixes broken duration reporting.
2014-02-10 17:27:10 +01:00
Sebastian Dröge
a5387eb372 hlsdemux: Use locale-independent int/float parsing functions from GLib 2014-02-10 17:27:10 +01:00
Sebastian Dröge
6abed8da20 hlsdemux: Update to non-deprecated GLib thread API 2014-02-09 18:19:33 +01:00
Alessandro Decina
d2d6798087 Make the hls plugin depend on gnutls and move to ext/hls/
gnutls is used to implement AES decryption
2013-03-19 10:54:18 +01:00
Renamed from gst/hls/m3u8.c (Browse further)