Commit graph

88 commits

Author SHA1 Message Date
George Kiagiadakis
ea90ceac01 dashdemux: support downloading segments in reverse order
When a seek with a negative rate is requested, find the target
segment where gstsegment.stop belongs in and then download from
this segment backwards until the first segment.

This allows proper reverse playback.
2014-08-07 16:52:37 +03:00
Sebastian Dröge
ae679506b1 dashdemux: 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 12:47:51 +02:00
Thiago Santos
16d969b945 dashdemux: mpdparser: properly unref gstdatetime
Avoid leaking the GstDateTime instances when summing dates

CID #1212143
2014-05-13 11:22:58 -03:00
Thiago Santos
288e8d5c0e dashdemux: mpdparser: avoid double free of segment timeline node
The parsing function already frees the old value (if any), avoid a double
free by not freeing it before calling the function without setting the
pointer to NULL

Coverity ID: 1212178
2014-05-13 10:45:29 -03:00
Thiago Santos
64bea0252b dashdemux: mpdparser: avoid double free
The _parse_url function already frees the previous pointer, avoid
freeing it before without setting to null or we have a double free.

Coverity ID: 1212181
Coverity ID: 1212180
Coverity ID: 1212179
2014-05-13 10:13:37 -03:00
Edward Hervey
651a4ae2e7 dash: Don't leak GstActiveStream
CID #1212142
2014-05-13 13:52:48 +02:00
Wim Taymans
6c014f7e36 mpdparse: only add location when node existed
Actually return FALSE when the location node was non-existing
Only add the location node when it existed
2014-04-03 11:48:07 +02:00
Thiago Santos
3d2f3bcf62 dashdemux: remove unnecessary variable
Instead of using 2 indexes that were actually the same, use only
one. Saves a variable.
2014-01-09 09:13:48 -03:00
Thiago Santos
cea909b877 dashdemux: fix seeking when the mpd uses a segment template
Remove the dashdemux seeking function to use the one implemented
in mpdparser as it is more complete. This also makes dashdemux not
crash when seeking on streams that use segment templates.
2014-01-09 09:11:23 -03:00
Thiago Santos
d353d229b1 dash: detect EOS when segments are generated by template
Use the Period duration do know when to end the stream
2013-12-24 17:07:52 -03:00
Thiago Santos
1d2de4a034 dashdemux: run gst-indent
Lots of indentation issues making it very annoying to commit
because of the indent hook. Fix this for once.
2013-12-24 17:07:51 -03:00
Thiago Santos
08636f3bab dashdemux: expose all streams
always expose all streams instead of only exposing one of each type.

This is more aligned with gstreamer's way of working. Allows the user
to select the stream that it wants to use by linking its pad and leaving
the unused ones as unlinked.
2013-12-24 17:07:51 -03:00
Alex Ashley
42fd04ce48 dashdemux: stop fetching live fragments that don't yet exist
There is an issue for live streams where download_loop will keep
downloading segments until it gets a 404 error for a segment
that has not yet been published. This is a problem because this
request for a segment that doesn't exist will propagate all the
way back to the origin server(s). This means that dashdemux causes
extra load on the origin server(s) for segments that aren't yet
available.

This patch uses availabilityStartTime, period
and the host's idea of UTC to decide if a fragment is available to
be requested from an HTTP server and filter out requests for fragments
that are not yet available.

https://bugzilla.gnome.org/show_bug.cgi?id=701404
2013-10-03 09:15:37 -03:00
Josep Torra
0b54b0568d dashdemux: Fix warnings when building in OS X Snow Leopard
gstmpdparser.h:530: warning: type qualifiers ignored on function return type
gstmpdparser.c:4177: warning: type qualifiers ignored on function return type
2013-08-30 21:36:19 +02:00
Chris Bass
7f21226956 dashdemux: offset segment numbers by startNumber
For SegmentTemplate elements containing a startNumber attribute, the
`number' member of GstMediaSegments should be offset by the value of
startNumber; however, this is not currently the case. As a result, the
first URI(s) requested by the download loop will be wrong.

This commit ensures that segment numbers will be offset by startNumber
when one is present in a SegmentTemplate element.

https://bugzilla.gnome.org/show_bug.cgi?id=705661
2013-08-16 11:15:47 -03:00
Chris Bass
19a45554bf dashdemux: remove incorrect timestamp scaling.
When using a SegmentTemplate element, the timestamps of the buffers
output by dashdemux are incorrect, causing problems downstream.

The reason is that GstMediaSegment start times are calculated (in
gst_mpdparser_get_chunk_by_index) by multiplying segment index by
segment duration and then scaling the result according the `timebase'
attribute from the MPD. However, the segment duration is already a
GstClockTime (i.e., it has already been scaled according to the timebase
from the MPD and converted to a nanosecond value), so multiplying it by
the segment index will give the correct timestamp without the need for
any further scaling.

https://bugzilla.gnome.org/show_bug.cgi?id=705679
2013-08-16 10:22:21 -03:00
Edward Hervey
97426a1caa all: Fix for GST_DISABLE_GST_DEBUG
Where applicable, remove methods that don't do anything different than
the default implementation.
2013-07-29 09:42:12 +02:00
Thiago Santos
5a5e66ec90 dashdemux: handle live playback resync
During a live stream it is possible for dashdemux to lag behind on a
slow connection or to rush ahead of the connection os too fast.

For the first case it is necessary to jump some segments ahead to be able to
continue playback as old segments are usually deleted from the server.

For the later, dashdemux should wait a little before attempting another
download do give time to the server to produce a new segment
2013-07-08 23:40:14 -03:00
Thiago Santos
b316d8a677 dashdemux: fix template based segment generation
When using a template based segment list, do not try to
contruct a finite segment list for the limits of the available periods.

We might not know when the period ends (for live streams) and we can
always create the segment on demand when requested by dashdemux,
avoiding use of some memory and cpu when re-creating this list.
2013-07-08 23:39:49 -03:00
Thiago Santos
a8a355108a dashdemux: use more appropriate data structures for parsing
Replaces the 2 likely larger lists with more appropriate structures
to improve performance.

Replaces S nodes GList for a GQueue, this reduces latency to startup
because of traversing the list just append an element.

Replaces the processed media segments GList for a GPtrArray as it is
constantly acessed by index during playback.
2013-07-08 23:39:49 -03:00
Thiago Santos
9a38127467 dashdemux: prevent assertion when duration is unknown
Duration from segment being unknown is a issue from the MPD and not
a programming issue, so the assert isn't useful here. Instead check
and return an error code so the caller can fallback to alternatives
2013-07-03 19:11:45 -03:00
Thiago Santos
788757dc1f dashdemux: various cleanups
Removing unused function, replacing // comments with /* */ and
replacing some GST_WARNING with GST_INFO/_DEBUG as they are meant
to be
2013-07-03 15:34:41 -03:00
Alex Ashley
5ad2a2d161 dashdemux: Change first fragment selection for live streams
When dashdemux selects its first fragment, it always selects the
first fragment listed in the manifest. For on-demand content,
this is the correct behaviour. However for live content, this
behaviour is undesirable because the first fragment listed in the
manifest might be some considerable time behind "now".

The commit uses the host's idea of UTC and tries to find the
oldest fragment that contains samples for this time of day.

https://bugzilla.gnome.org/show_bug.cgi?id=701509
2013-07-03 15:34:30 -03:00
Thiago Santos
5c480dfc13 dashdemux: only generate index segment uri if there is a template
Simple fix to avoid an assertion.
2013-07-03 10:23:45 -03:00
Greg Rutz
5920ee2777 dashdemux: Implement inheritance for certain MPD elements
According to the MPEG-DASH spec, certain elements (i.e.
SegmentBase, SegmentTemplate, and SegmentList) should inherit
attributes from the same elements in the containing AdaptationSet
or Period.

Updated the SegmentBase, SegmentTemplate, and SegmentList parsers
to properly inherit attributes from the corresponding elements in
AdaptationSet and/or Period.

https://bugzilla.gnome.org/show_bug.cgi?id=702677
2013-07-03 10:23:45 -03:00
Greg Rutz
5e0ed52880 dashdemux: Properly detect presence of xml attributes
Convert all xml attribute/content parsing functions to return a
boolean value indicating whether or not the attribute/content was
present.  We need this finer-grained control in order to properly
implement the inheritance policies described in the spec

Also fixed several memory leak conditions when handling errors in
the xml attribute/content parsing functions.

https://bugzilla.gnome.org/show_bug.cgi?id=702677
2013-07-03 10:23:45 -03:00
Thiago Santos
467b22c567 dashdemux: change debug message from warning to info
It isn't a warning/issue.
2013-07-03 10:23:45 -03:00
Thiago Santos
94c6497dfa dashdemux: protect from access to empty list data
Check if the list has elements before trying to access the last one
and causing a segfault
2013-07-03 10:23:45 -03:00
Olivier Crête
3f26bb9154 dashdemux: Handle case without an initialization segment
If no initialization segment is defined, then don't print a
critical or a warning, just ignore it.

https://bugzilla.gnome.org/show_bug.cgi?id=701961
2013-07-02 01:30:24 -03:00
Thiago Santos
4c89fab390 dash: save 1 or 2 string copies when getting fragment uris
Only create new string if required, saving maybe 1 or 2 str copies per
fragment.
2013-07-01 18:52:08 -03:00
Thiago Santos
aa1fe88a08 dashdemux: each fragment can have its own index
Return index URI/range to dashdemux from the mpdparser to be able
to download and deliver them downstream for playback.
2013-07-01 18:52:08 -03:00
Thiago Santos
d68fffc217 dashdemux: handle top-level index urls
Parse and provide access to top-level index segments if available.
dashdemux should push those whenever a header is pushed.

Fixes #700489
2013-07-01 18:52:08 -03:00
Arthur Shipkowski
54d87f071c dashdemux: Fix critical error output when Initialization has no URL
Issue evinced by
http://yt-dash-mse-test.commondatastorage.googleapis.com/car-20120827-manifest.mpd
which produces output like ** (gst-launch-1.0:8060): CRITICAL **:
gst_mpdparser_get_initializationURL: assertion `InitializationURL->sourceURL
!= NULL' failed

https://bugzilla.gnome.org/show_bug.cgi?id=700489
2013-07-01 18:51:30 -03:00
Thiago Santos
d9c324c6c7 dashdemux: prevent crash by checking if the segment node is present
Do not try to access range data if there is no segment node
2013-07-01 14:35:02 -03:00
Thiago Santos
d0befd39f0 dash: use same debug category for dashdemux and the mpd parser
Makes debugging easier
2013-07-01 14:22:02 -03:00
Thiago Santos
4f17112392 dashdemux: add support for range based segments
Use the mediaRange information and pass it to the uridownloader
to correctly download only the segment ranges indicated in the
MPD

https://bugzilla.gnome.org/show_bug.cgi?id=702206
2013-07-01 14:22:01 -03:00
Greg Rutz
45111f2efe dashdemux: Cleanup memory allocation/deallocation
Ensure that g_free/xmlFree is used correctly based on how the
memory was allocated.

When deallocating GLists, there were many places that were using
g_list_foreach and g_list_free.  Converted these occurrences to
call g_list_free_full.

Add NULL checks to all xmlFree calls since the documentation does
not guarantee that passing NULL is safe

In places where we are strdup'ing memory allocated by libxml2,
changed those calls to use xmlMemStrdup().

There were several places where we were missing g_slice_free when
deallocating a top-level node structure.

https://bugzilla.gnome.org/show_bug.cgi?id=702837
2013-06-25 20:53:17 -03:00
Olivier Crête
220f075423 dashdemux: Announce correct mpegts caps 2013-05-15 22:24:29 -04:00
Thiago Santos
919cb34fee dash: do not use deprecated glib mutex API 2013-05-08 18:14:46 -03:00
Thiago Santos
34e1b59eca dashdemux: fixing compiler warnings about print formats 2013-05-08 18:14:46 -03:00
Thiago Santos
d9baed8302 dash: mpdparser: do not cleanup xml lib too early
The xmlCleanupParser function seems to cleanup all statically
allocated libxml variables, making it unusable. We can't guarantee
that dashdemux won't need it anymore, so better not call it.
2013-05-08 18:14:42 -03:00
Thiago Santos
14feeb3ccb dashdemux: reimplementing live streams manifest updates
Manifest updates should be done periodically for live streams,
this patch makes the demuxer create a new manifest client for
the new version and transfers the stream position to the new
one, discarding the old one afterwards.
2013-05-08 18:14:42 -03:00
Thiago Santos
b01a3729c0 dash: mpdparser: allow periods without start time for live streams
Live streams can have undefined start times for the periods and
mpdparser can let that pass instead of erroring out
2013-05-08 18:14:41 -03:00
Thiago Santos
cff4498f7c dash: mpdparser: use guint64 for timestamps
The timestamps can be pretty big, so use guint64 for them
2013-05-08 18:14:41 -03:00
Thiago Santos
a53fd87508 dashdemux: mpd parsing: fix query parameter parsing
Try harder to detect URL parameters and split them to accomodate
the fragment url in the concat:

base-url + fragment-url + url-parameters
2013-05-08 18:14:41 -03:00
Thiago Santos
4ca530f2fe dashdemux: plug some leaks
Add some missing free/unrefs spotted by valgrind
2013-05-08 18:14:41 -03:00
Andre Moreira Magalhaes (andrunko)
b9272dc0e6 dashdemux: Properly parse base uri from mpd. 2013-05-08 18:14:40 -03:00
Thiago Santos
770df6277a dashdemux: refactor to use the uridownloader lib instead of internal copy 2013-05-08 18:14:39 -03:00
Thiago Santos
83c0e1e25d dashdemux: download the next fragment with smaller timestamp
Instead of downloading 1 fragment per stream per download loop,
select the stream with the earlier timestamp and get a fragment
only for that one.

The old algorithm would lead to problems when the fragment durations
were too different for streams.
2013-05-08 18:14:39 -03:00
Thiago Santos
2d85107299 dashdemux: correctly signal EOS on manifest end
Put EOS on the streams queues after the last fragment from the
last period for each stream. This way we keep it serialized
with the buffers and it will work when streams have different
ending times
2013-05-08 18:14:34 -03:00