player: remove OSD subtitle render path

This was used with --no-sub-ass (aka --no-ass). This option (which is
not yet removed) strips all styling from the subtitles, and renders them
as plaintext only. For some reason, it originally seemed convenient to
reuse all the OSD text rendering code (osd_libass.c). While this was
indeed simple, it had a bad influence on the rest of the code. For
example, it had to decide whether to go through the OSD code path, or
the proper subtitle renderer in sd_ass.c.

Kill the OSD subtitle renderer. Reimplement --no-sub-ass and also
"secondary" subtitles in sd_ass.c. fill_plaintext() contains some rather
minor code duplication with osd_libass.c for setting up a dummy
ASS_Event and escaping the stripped text. Since sd_ass.c already has to
handle "normal" text subtitles, and has code for stripping ASS tags,
this remains all relatively simple.

Remove all the unnecessary crap from the rest of the code.

1 files changed, 3 insertions, 4 deletions

diff --git a/player/command.c b/player/command.c
index f6ccf22cae..7d520d78ac 100644
--- a/player/command.c
+++ b/player/command.c
@@ -4472,14 +4472,13 @@ int run_command(struct MPContext *mpctx, struct mp_cmd *cmd, struct mpv_node *re
     case MP_CMD_SUB_SEEK: {
         if (!mpctx->playback_initialized)
             return -1;
-        struct osd_sub_state state;
-        update_osd_sub_state(mpctx, 0, &state);
+        struct dec_sub *sub = mpctx->d_sub[0];
         double refpts = get_current_time(mpctx);
-        if (state.dec_sub && refpts != MP_NOPTS_VALUE) {
+        if (sub && refpts != MP_NOPTS_VALUE) {
             double a[2];
             a[0] = refpts - opts->sub_delay;
             a[1] = cmd->args[0].v.i;
-            if (sub_control(state.dec_sub, SD_CTRL_SUB_STEP, a) > 0) {
+            if (sub_control(sub, SD_CTRL_SUB_STEP, a) > 0) {
                 if (cmd->id == MP_CMD_SUB_STEP) {
                     opts->sub_delay -= a[0];
                     osd_changed_all(mpctx->osd);