Commit graph

19 commits

Author SHA1 Message Date
Alex Ashley
95c705ae8f dashdemux: add support for UTCTiming elements for clock drift compensation
Unless the DASH client can compensate for the difference between its
clock and the clock used by the server, the client might request
fragments that either not yet on the server or fragments that have
already been expired from the server. This is an issue because these
requests can propagate all the way back to the origin

ISO/IEC 23009-1:2014/Amd 1 [PDAM1] defines a new UTCTiming element to allow
a DASH client to track the clock used by the server generating the
DASH stream. Multiple UTCTiming elements might be present, to indicate
support for multiple methods of UTC time gathering. Each element can
contain a white space separated list of URLs that can be contacted
to discover the UTC time from the server's perspective.

This commit provides parsing of UTCTiming elements, unit tests of this
parsing and a function to poll a time server. This function
supports the following methods:
    urn:mpeg:dash:utc:ntp:2014
    urn:mpeg:dash:utc:http-xsdate:2014
    urn:mpeg:dash:utc:http-iso:2014
    urn:mpeg:dash:utc:http-ntp:2014

The manifest update task is used to poll the clock time server,
to save having to create a new thread.

When choosing the starting fragment number and when waiting for a
fragment to become available, the difference between the server's idea
of UTC and the client's idea of UTC is taken into account. For example,
if the server's time is behind the client's idea of UTC, we wait for
longer before requesting a fragment

[PDAM1]: http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=66068

dashdemux: support NTP time servers in UTCTiming elements

Use the gst_ntp_clock to support the use of an NTP server.

https://bugzilla.gnome.org/show_bug.cgi?id=752413
2015-08-14 06:47:20 -03:00
Thiago Santos
9d431e605f tests: dash_mpd: add check for segmenttemplate inheritance
Checks if the values are properly inherited and overwriten
2015-08-01 16:11:07 -03:00
Thiago Santos
9c291904f5 tests: dash_mpd: add one more baseURL test
This other type of baseURL test was replaced by a more complex one,
better have both to keep both options working

Also adds another 2 variations of how baseURL can be generated

https://bugzilla.gnome.org/show_bug.cgi?id=752776
2015-08-01 16:11:01 -03:00
Florin Apostol
6ce65709bd dashdemux: tests: added duration format test
https://bugzilla.gnome.org/show_bug.cgi?id=752776
2015-08-01 16:10:55 -03:00
Florin Apostol
86c12c7357 dashdemux: tests: update unit test for baseURL
Update the unit test for baseURL to test that it is properly
resolved taking into account parent baseURL elements.

https://bugzilla.gnome.org/show_bug.cgi?id=752776
2015-08-01 11:52:26 -03:00
Sebastian Dröge
cd47556351 mpdparser: Fix some memory leaks in the MPD parser and unit test 2015-07-08 23:15:14 +03:00
Florin Apostol
d525d9c391 dashdemux: tests: added unit tests to test all functions
Added unit tests for all functions. Code coverage:
Overall coverage rate:
  lines......: 83.8% (1941 of 2316 lines)
  functions..: 100.0% (141 of 141 functions)
2015-07-08 23:15:14 +03:00
Florin Apostol
57042af9d6 dashdemux: tests: added indentation in xml strings to improve readability
https://bugzilla.gnome.org/show_bug.cgi?id=752027
2015-07-07 14:13:53 +03:00
Florin Apostol
397fa37093 dashdemux: tests: corrected code layout
deleted the empty line between gst_mpd_parse call and its check so that
the assert is next to the function it is testing

https://bugzilla.gnome.org/show_bug.cgi?id=752027
2015-07-07 14:01:03 +03:00
Florin Apostol
e2d1126391 dashdemux: corrected recognition of $$$ in segment templates
fixed recognition of $$ after a $ that ends an identifier, eg $Time$$$

https://bugzilla.gnome.org/show_bug.cgi?id=751682
2015-06-29 19:28:56 -03:00
Florin Apostol
87a4d523b9 tests: dashdemux: renamed functions
Renamed 2 testcase functions:
- dash_mpdparser_program_information
- dash_mpdparser_base_URL
2015-06-25 10:13:23 +02:00
Florin Apostol
b8cb37f04d tests: dashdemux: added explicit type conversions
flexelint (http://www.gimpel.com/html/flex.htm) static code analyser
complained about implicit conversions from unsigned to signed, so I added
explicit conversions.

Ideally, the size parameter of gst_mpd_parse function should be unsigned,
but I don't want to change the API.
2015-06-24 12:22:44 +02:00
Florin Apostol
d02f9d30af tests: dashdemux: corrected return type for duration_to_ms function
The duration_to_ms function converts a time specified by year, month, day,
hour, minute, second, millisecond to a millisecond value. Because all the
arguments are positive numbers, the result must also be positive.

This patch changes the returned value from a gint64 to a guint64 type.
2015-06-24 12:22:33 +02:00
Florin Apostol
d310a1edcf tests: dashdemux: added parsing of period element
Improved dash_mpd unit tests by adding new tests that parse the Period element.

Code coverage reported by lcov for dash/gstmpdparser.c is:
  lines......: 43.0% (985 of 2290 lines)
  functions..: 47.5% (67 of 141 functions)
2015-06-22 18:22:57 +02:00
Florin Apostol
05198e2df1 tests: dashdemux: extended MPD element test to test xml namespaces
Extended the dash_mpdparser_mpd testcase to also test parsing the xml
namespace attribute.

https://bugzilla.gnome.org/show_bug.cgi?id=750863
2015-06-22 13:55:46 +02:00
Florin Apostol
8336d7a60b dashdemux: corrected computation of period's duration
According to ISO/IEC 23009-1:2014(E), chapter 5.3.2.1
"The Period extends until the PeriodStart of the next Period, or until
the end of the Media Presentation in the case of the last Period."

This means that a configured value for optional attribute period duration
should be ignored if the next period contains a start attribute or it is
the last period and the MPD contains a mediaPresentationDuration attribute.

https://bugzilla.gnome.org/show_bug.cgi?id=750797
2015-06-22 13:47:54 +02:00
Florin Apostol
9f56cc27ab dashdemux: fixed getting representation based on max bandwidth
The gst_mpdparser_get_rep_idx_with_max_bandwidth function assumes
representations are ordered by bandwidth and incorrectly returns the
first one when wanting the one with minimum bandwidth.

Corrected gst_mpdparser_get_rep_idx_with_max_bandwidth function to get the
correct representation in case max_bandwidth parameter is 0.

https://bugzilla.gnome.org/show_bug.cgi?id=751153
2015-06-18 11:29:45 -03:00
Florin Apostol
b23e4452a2 dashdemux: fixed segfault for missing default namespace
Added a check for a_node->ns before accessing a_node->ns->href in
gst_mpdparser_get_xml_node_namespace. This could happen if the xml
is missing the default namespace.

https://bugzilla.gnome.org/show_bug.cgi?id=750866
2015-06-12 22:45:51 +02:00
Florin Apostol
8b18be5bfb tests: dashdemux: add unit tests for checking the parsing of MPD element
Create a dash test target and add unit tests that check the parsing of
attributes of the MPD element and the following child elements:
 - baseURL
 - program information
 - location
 - metrics

These tests check the compliance of parts of the MPD parser in the
dashdemux element against the DASH specification [1].

    [1] http://standards.iso.org/ittf/PubliclyAvailableStandards/c065274_ISO_IEC_23009-1_2014_Electronic_inserts.zip
        http://standards.iso.org/ittf/PubliclyAvailableStandards/c065274_ISO_IEC_23009-1_2014.zip

https://bugzilla.gnome.org/show_bug.cgi?id=750390
2015-06-08 13:17:49 -03:00