Commit graph

87 commits

Author SHA1 Message Date
Tim-Philipp Müller
d9f83ad938 dvbsuboverlay: fix atomic access 2010-12-17 10:50:36 +00:00
Janne Grunau
b73ae45460 dvbsuboverlay: fix rendering artefacts
Initialize source x position for odd height special case.
2010-12-16 15:33:59 +00:00
Edward Hervey
b191fb2b05 dvbsuboverlay: The enable property is a boolean and not an integer 2010-12-16 11:29:07 +01:00
Sebastian Dröge
a99e13cd5a dvbsuboverlay: Rename DVB subtitling media type to subpicture/x-dvb 2010-12-15 21:11:29 +01:00
Sebastian Dröge
a71c3f7e48 dvbsuboverlay: Don't draw anything on the video if the enable property is set to FALSE 2010-12-15 20:54:35 +01:00
Sebastian Dröge
65598884d2 dvbsuboverlay: Add #defines for the property default values 2010-12-15 20:53:21 +01:00
Sebastian Dröge
e9fa2fcd8b dvbsuboverlay: Use g_atomic_int_get() for reading the max_page_timeout field 2010-12-15 20:51:12 +01:00
Janne Grunau
9b3b1aedea dvbsuboverlay: use atomic instructions to set/get enable property 2010-12-15 20:47:25 +01:00
Janne Grunau
533453186e dvbsuboverlay: add property to limit page_time_out to a setable maximum 2010-12-15 20:47:25 +01:00
Janne Grunau
36b101cfb8 dvbsuboverlay: implement display definition segment subtitle windows
simplifies subtitle scaling in blit_i420()
2010-12-15 20:47:25 +01:00
Janne Grunau
4d8220b033 dvbsuboverlay: scale subtitles according to the display size
Display size is either transmitted in the display definition segment or
implicitly defined to 720x576. The subtitle window information also present in
the display definition segment is not yet used.
2010-12-15 20:47:25 +01:00
Janne Grunau
83a84ba230 dvbsuboverlay: implement display definition segment parsing 2010-12-15 20:47:25 +01:00
Janne Grunau
2f6f78caa3 dvbsuboverlay: fix luma stride for scaled subtitles (display width != width) 2010-12-15 20:47:24 +01:00
Alessandro Decina
5c097c447b dvbsuboverlay: fix compiler warnings on OSX. 2010-12-08 19:36:48 +01:00
Sebastian Dröge
04eb581480 dvbsuboverlay: Implement nearest neighbour scaling for the subpictures
This becomes necessary when SDTV subtitles are used for HDTV videos.
2010-12-08 16:30:12 +01:00
Sebastian Dröge
8974371914 dvbsuboverlay: Revert some parts of last commit that shouldn't be committed 2010-12-08 16:30:11 +01:00
Sebastian Dröge
68b8fca047 dvbsuboverlay: Really choose the latest possible subpictures
And not the first subpictures that are still valid according to the
page timeout.
2010-12-08 16:30:11 +01:00
Sebastian Dröge
e25a1dc0cc dvbsuboverlay: Refactor blending function and take average of all chroma values 2010-12-08 16:30:11 +01:00
Sebastian Dröge
2282a08890 dvbsuboverlay: Improve selection of current to be displayed subpictures
Drop all subpictures that are too old anyway and clear the currently
displayed subpictures if num_rects==0 happens.
2010-12-08 16:30:11 +01:00
Sebastian Dröge
01cf79ae59 dvbsuboverlay: Implement clipping of video buffers
Also don't clip subpicture buffers, they have no duration and
clipping them doesn't make much sense here.
2010-12-08 16:30:11 +01:00
Sebastian Dröge
672cb276be dvbsuboverlay: Clean up locking some more 2010-12-08 16:30:10 +01:00
Sebastian Dröge
92109fdfbc dvbsuboverlay: Flush subtitles and all internal state when needed 2010-12-08 16:30:10 +01:00
Sebastian Dröge
472cace08b dvbsuboverlay: Set the global library log function exactly once
And don't use one of the possibly many renderer instances, this is only
calling for crashes.
2010-12-08 16:30:10 +01:00
Sebastian Dröge
2a976ae133 dvbsuboverlay: Remove lots of commented out and unused code and clean up locking 2010-12-08 16:30:10 +01:00
Mart Raudsepp
a203ad1aab dvbsuboverlay: Fix more of the blending, so it looks quite good now
* libdvbsub gives us alpha channel already, not transparency level, so
don't do another "alpha = 255 - alpha", this is done by libdvbsub.
* Fix alpha channel handling in interpolation - assrender had an additional
1bpp alpha bitmap as a possible mask, we don't. So don't use the palette
index array as alpha values; bug from quick code porting long ago to
changing pixel colors (assrender has a single pixel color for whole
regions or something, unlike dvbsub, which has indexed colors).
* Don't forget to reassign our YUV and other local pixel color variables
after shifting to work on the bottom part of a 2x2 subsample block, or
it's obviously very blocky.

Remaining issues in blending:

* Should probably be interpolating or doing something else useful with the
resulting U and V channels, so that most of the source pixel UV values would
actually be actually cared about, except for just one out of possibly four.

* Don't convert AYUV to ARGB in libdvbsub, and then back from ARGB to AYUV in
dvbsuboverlay for no reason

* Re-factor the whole thing to something more like textoverlay blending
* Related to that, perhaps cache the current spu in a good format for quick
blending on each frame, after which the more often called blending parts
might become more straightforward
2010-12-08 16:30:10 +01:00
Mart Raudsepp
efa1e9a1fe dvbsuboverlay: Fix blending bug regarding color channel addressing.
libdvbsub gives us ARGB ordered pixels right now, not RGBA.
2010-12-08 16:30:10 +01:00
Mart Raudsepp
21abf9c4a8 dvbsuboverlay: Do blending calls when appropriate
This gives us actually shown subtitles, however with bugs in the
current blitting code, resulting in very transparent subtitles.
2010-12-08 16:30:10 +01:00
Mart Raudsepp
84b52f6eb4 dvbsuboverlay: Implement fallback page_time_out honoring
The spec has a page_time_out in the page composition segment to ensure
subtitles don't get stuck on screen for too much longer than intended,
when future page composition segments get lost on bad reception, or other
problems. Honor it in the gst plugin side.
2010-12-08 16:30:10 +01:00
Mart Raudsepp
3d09a3b18a dvbsuboverlay: Implement subtitle queueing and syncing with video
Push incoming subtitle pages in a FIFO queue (pending_subtitles)
and dequeue the head when it's time to show it (when video running
time reaches the subtitle page running time).
Keep the subtitle page, that is supposed to be blended on top of video
currently, in a separate object variable (current_subtitle). As a
next step we can then pre-render current_subtitle to a better to blend
format.
2010-12-08 16:30:10 +01:00
Mart Raudsepp
41c82583f5 dvbsuboverlay: Make the new dvb_subtitles_free() accept NULL
Don't crash if dvb_subtitles_free(NULL) gets passed, like most other
*_free functions are happy with.
2010-12-08 16:30:10 +01:00
Mart Raudsepp
7e2e52cab8 dvbsuboverlay: Pass page_time_out and pts with the DVBSubtitles structure
Eases holding onto the information in gst plugins side queue of
DVBSubtitles, so we won't need to create yet another temporary struct
to keep the pts and page_time_out too.
And this really logically belongs at the toplevel information set anyway
and in that struct...
2010-12-08 16:30:09 +01:00
Mart Raudsepp
aca7237878 dvbsuboverlay: Make the libdvbsub callback handler responsible for memory cleanup
We want to allow queueing of raw region image data in the gst plugin side,
and keep the data around until we pop the item from the queue. So make
the callback handler responsible for memory cleanup, if one is installed.
2010-12-08 16:30:09 +01:00
Mart Raudsepp
4a68decb52 dvbsuboverlay: Work with GstClockTime instead of PTS for subtitle timing
Abuse libdvbsub PTS tracking to just store our running time in it, to get
it back in the callbacks. As GStreamer does its own PTS handling behind our
back (especially for video), we should just sync with video per running time,
not try to do it with PTS, which doesn't seem well accessible for video chain.
We can later relabel dvb-sub.c pts naming convention if wanted, it's just
passing along guint64 values, which GstClockTime fortunately is too.

The current idea is to collect the regions returned by the callback into
a FIFO buffer and pop and pre-render the top one into a separate
quick-to-blend cached format, which is then appropriately blended in the
video chain until the next one on top of the stack reaches the video chains
running time (or the fallback timer hits).
2010-12-08 16:30:09 +01:00
Mart Raudsepp
316cd44c8d dvbsuboverlay: Add FIXME note about non-constant PTS for a display set handling. 2010-12-08 16:30:09 +01:00
Mart Raudsepp
7cab41013e dvbsuboverlay: Remove dvb_sub_feed() API
GStreamer will only use dvb_sub_feed_with_pts, as it has its own PES filter
to do the header parsing.
2010-12-08 16:30:09 +01:00
Tim-Philipp Müller
08c355823b dvbsuboverlay: more TODO 2010-12-08 16:30:09 +01:00
Mart Raudsepp
a8d891dc5e dvbsuboverlay: initial version, work in progress 2010-12-08 16:30:09 +01:00