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author | wm4 <wm4@nowhere> | 2019-05-22 23:15:34 +0200 |
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committer | wm4 <wm4@nowhere> | 2019-09-19 20:37:04 +0200 |
commit | 27c5550de2693d27ed24d3838a4ae16a06a9dd5d (patch) | |
tree | 15d8955dac3d0515e3d2bae878738df4710afbf1 /sub | |
parent | f06b3d7f887a9515dbad314f9d57351169e08a9b (diff) | |
download | mpv-27c5550de2693d27ed24d3838a4ae16a06a9dd5d.tar.bz2 mpv-27c5550de2693d27ed24d3838a4ae16a06a9dd5d.tar.xz |
sd_lavc: implement --sub-pos for bitmap subtitles
Simple enough to do. May have mixed results. Typically, bitmap subtitles
will have a tight bounding box around the rendered text. But if for
example there is text on the top and bottom, it may be a single big
bitmap with a large transparent area between top and bottom. In
particular, DVD subtitles are really just a single screen-sized
RLE-encoded bitmap, though libavcodec will crop off transparent areas.
Like with sd_ass, you can't move subtitles _down_ if they are already in
their origin position. This could probably be improved, but I don't want
to deal with that right now.
Diffstat (limited to 'sub')
-rw-r--r-- | sub/sd_lavc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sub/sd_lavc.c b/sub/sd_lavc.c index 11f7711b7e..ef46521f0b 100644 --- a/sub/sd_lavc.c +++ b/sub/sd_lavc.c @@ -447,6 +447,23 @@ static void get_bitmaps(struct sd *sd, struct mp_osd_res d, int format, w = priv->video_params.w; h = priv->video_params.h; } + + if (opts->sub_pos != 100 && opts->ass_style_override) { + int offset = (100 - opts->sub_pos) / 100.0 * h; + + for (int n = 0; n < res->num_parts; n++) { + struct sub_bitmap *sub = &res->parts[n]; + + // Decide by heuristic whether this is a sub-title or something + // else (top-title, covering whole screen). + if (sub->y < h / 2) + continue; + + // Allow moving up the subtitle, but only until it clips. + sub->y = MPMAX(sub->y - offset, 0); + } + } + osd_rescale_bitmaps(res, w, h, d, video_par); } |