History

Armin Le Grand (allotropia) 789a737ac9 Remove DeleteItemOnIdlex There are some CrashReports in 7.6 which have DeleteItemOnIdle on the stack, but there is nothing reproducable. So I took a look... I first thought it's a MCGR regression, due to classes on the stack. But the Item involved is just random, can happen with any Item. Then I thought it may have to do with ITEM refactorings, but it happens with DeleteItemOnIdle involved, so also not the case. I already saw DeleteItemOnIdle when doing these and qualified as 'hack' in the way. already It is only on Windows and DeleteItemOnIdle is involved. This again (took a deeper look now) is an old hack to keep an SfxPoolItem 'alive' for some 'time'. For that, it triggers an async reschedule which then deletes the Item when being called. If the Item will be used after that is pure coincidence - seems to work in most cases. It seems as if for Windows the timing slightly changed for some scenarios, so a reschedule is too early. This can happen with this hack anytime. DeleteItemOnIdle is used in scenarios where SfxPoolItem* is e.g. returned, but is not anchored, so e.g. not member of an SfxItemSet. Or in short: Lifetime is not safe. DeleteItemOnIdle exists since 1st import, but was changed to AsyncEvent ca. 4 months ago (see `57145acf9e`), so that may have caused it. It is possible that these errors happen on Windows since then. Before something more complicated was used to delete it late, but surely also not really safe. Due to ITEM refactor I have the knowledge/tooling to solve this. It will not be a 1-5 lines fix, but it is a hack and in the way for further ITEM refactor anyways. What we have nowadays is a SfxPoolItemHolder -> it's like an SfxItemSet for a single Item. It safely holds/ controls the lifetime of an SfxPoolItem. It is already used in quite some places. It helps to solve many hacks, also the ones putting Items directly to the Pool - due to there never was an alternative for that. In principle the ItemPool/ItemSet/Item paradigm was never complete without SfxPoolItemHolder. Thus I started to fix that (and remove that hack for good, sooo many changes over the years, sigh), but as said is not straightforward. Will have to change retvals of involved stuff to SfxPoolItemHolder - it's just two pointers and designed to be copied (one is a Pool, needed to cleanup when destructing). CopyConstruct/destroy just counts the RefCnt up/down, so cheap. 1st version compiling, let's check on gerrit... Corrected one error in QueryState for securitypage, also added some security features/asserts. Change-Id: Ida49fd35ca88ead84b11d93e18b978cb9e395090 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/161083 Tested-by: Jenkins Reviewed-by: Armin Le Grand <Armin.Le.Grand@me.com>		2023-12-21 21:13:55 +01:00
..
inc	Extended loplugin:ostr: Rewrite some O[U]StringLiteral -> O[U]String	2023-10-23 11:04:42 +02:00
source	Remove DeleteItemOnIdlex	2023-12-21 21:13:55 +01:00
util
AllLangMoTarget_avmedia.mk
IwyuFilter_avmedia.yaml	replace usage of blacklist with excludelist for IWYU	2020-07-10 02:03:40 +02:00
Library_avmedia.mk	Use less epoxy external headers dependency	2023-09-23 10:38:36 +02:00
Library_avmediagst.mk	tdf#149971 avmedia: implement video crop support in the gsteamer backend	2022-08-26 11:48:41 +02:00
Library_avmediagtk.mk	first cut at using Gtk4 built in video playback	2022-02-18 20:40:01 +01:00
Library_avmediaMacAVF.mk	Generally determine Rdb content from gb_*_set_componentfile calls	2021-12-10 08:14:24 +01:00
Library_avmediawin.mk	Generally determine Rdb content from gb_*_set_componentfile calls	2021-12-10 08:14:24 +01:00
Makefile
Module_avmedia.mk	first cut at using Gtk4 built in video playback	2022-02-18 20:40:01 +01:00
README.md	Updated README.md files to represent current code / use Markdown format	2021-04-07 17:47:16 +02:00

README.md

Audio / video Media Implementation.

Provides per-platform implementations of multimedia functionality. Currently no stream API is provided, only a URI based one, so streaming has to be wrapped around it via temp files.

Also provides (in source/framework/mediacontrol.cxx) an implementation of the graphical media playback control that appears in the toolbar / mediaobject bar when media is selected under the .uno:AVMediaToolBox item.

avmedia / gstreamer

The avmedia component is implementation of manager service defined in offapi/com/sun/star/media/. Radek has added implementation based on gstreamer so that we can add audio and video files into impress presentation on Linux with gstreamer.

The implementation is pretty straightforward, sometimes it has problems when gstreamer installation is incomplete.

In the beginning the media files were not embedded, Thorsten added support for that later.

Future Works

it might be worthwhile to revamp the avmedia UI.