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sub: move all subtitle timestamp messing code to a central place

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It was split at least across osd.c and sd_ass.c/sd_lavc.c. sd_lavc.c
actually ignored most of the more obscure subtitle timing things.
There's no reason for this - just move it all to dec_sub.c (mostly from
sd_ass.c, because it has some of the most complex stuff).

Now timestamps are transformed as they enter or leave dec_sub.c.

There appear to have been some subtle mismatches about how subtitle
timestamps were transformed, e.g. sd_functions.accepts_packet didn't
apply the subtitle speed to the timestamp. This patch should fix them,
although it's not clear if they caused actual misbehavior.

The semantics of SD_CTRL_SUB_STEP are slightly changed, which is the
reason for the changes in command.c and sd_lavc.c.
This commit is contained in:
wm4
2017-12-29 15:39:38 +01:00
committed by Kevin Mitchell
parent 828bd2963c
commit 3bf7df4a5e
6 changed files with 80 additions and 52 deletions
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3
player/sub.c
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@@ -84,7 +84,6 @@ void uninit_sub_all(struct MPContext *mpctx)
static bool update_subtitle(struct MPContext *mpctx, double video_pts,
struct track *track)
{
struct MPOpts *opts = mpctx->opts;
struct dec_sub *dec_sub = track ? track->d_sub : NULL;
if (!dec_sub || video_pts == MP_NOPTS_VALUE)
@@ -96,8 +95,6 @@ static bool update_subtitle(struct MPContext *mpctx, double video_pts,
sub_control(dec_sub, SD_CTRL_SET_VIDEO_PARAMS, &params);
}
video_pts -= opts->sub_delay;
if (track->demuxer->fully_read && sub_can_preload(dec_sub)) {
// Assume fully_read implies no interleaved audio/video streams.
// (Reading packets will change the demuxer position.)