When using libass with a VO that has direct EOSD support the vf_ass
video filter is unnecessary and is not added automatically, but the
code that adds the filter when it is needed produced misleading output
messages in this case. The following two messages were printed at
MSGL_ERR level, making it look like an error condition:
Couldn't open video filter 'ass'.
ASS: cannot add video filter
Add a version of vf_open_plugin() called vf_open_plugin_noerr() that
does not itself print an error message if opening a vf fails and that
returns the exact status code returned by the vf open() function. Make
vf_ass return a different status code depending on whether there was
an actual error or if it determined a filter would be redundant. Use
the _noerr function in the code adding the filter to avoid the first
message and check the status code to avoid the second.
The filter copied the chroma planes from every potentially changed row
of the original image to its non-subsampled work area. Change it to
calculate the minimum and maximum x coordinate for each chroma row and
only copy the part between those.
The performance increase is only minor (though observable), but I
think the resulting code is no more complex than the original.
The effect of alpha blending was calculated as
color = orig_color * alpha / 255
where alpha and color range from 0 to 255.
Change this to
color = (orig_color * alpha + 255) / 256
where the "/ 256" can be expressed as a shift whereas the compiler
would probably generate a multiply+shift for the original "/ 255".
This formula gives a result that is too high by 1 for some inputs.
However it gives the exact result if alpha is 0 or 255 which is
probably the case where small errors would matter most.
If it is set, renderer is reconfigured before the next frame.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25841 b3059339-0415-0410-9bf9-f77b7e298cf2
The use of inttypes.h is more common throughout MPlayer and stdint.h
can create problems on obscure systems like HP-UX, see Bugzilla #831.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24565 b3059339-0415-0410-9bf9-f77b7e298cf2
It is possible to separately configure hinting for scaled and unscaled osd.
The default is native hinter for unscaled osd (only vo_gl at this point),
no hinting for vf_ass.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@23152 b3059339-0415-0410-9bf9-f77b7e298cf2
Recent libass api changes moved fontconfig initialization to filter's
config() function. It is bad, because cache update can take a long time,
resulting in unpleasant sound effects. This change restores the original
behaviour.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20722 b3059339-0415-0410-9bf9-f77b7e298cf2
- ass_instance_t renamed to ass_renderer_t
- ass_library_t introduced
- use of mplayer-specific global variables limited to ass_mp.c
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20493 b3059339-0415-0410-9bf9-f77b7e298cf2
FontConfig initialization moved from ass_init() to ass_set_fonts().
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20462 b3059339-0415-0410-9bf9-f77b7e298cf2
