sub/dec_sub.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdlib.h>
  20 #include <stdbool.h>
  21 #include <assert.h>
  22
  23 #include "config.h"
  24 #include "libmpdemux/stheader.h"
  25 #include "sd.h"
  26 #include "dec_sub.h"
  27 #include "options.h"
  28
  29 extern const struct sd_functions sd_ass;
  30 extern const struct sd_functions sd_lavc;
  31
  32 void sub_init(struct sh_sub *sh, struct osd_state *osd)
  33 {
  34     struct MPOpts *opts = sh->opts;
  35
  36     assert(!osd->sh_sub);
  37 #ifdef CONFIG_ASS
  38     if (opts->ass_enabled && is_text_sub(sh->type))
  39         sh->sd_driver = &sd_ass;
  40 #endif
  41     if (strchr("bpx", sh->type))
  42         sh->sd_driver = &sd_lavc;
  43     if (sh->sd_driver) {
  44         if (sh->sd_driver->init(sh, osd) < 0)
  45             return;
  46         osd->sh_sub = sh;
  47         osd->bitmap_id = ++osd->bitmap_pos_id;
  48         sh->initialized = true;
  49         sh->active = true;
  50     }
  51 }
  52
  53 void sub_decode(struct sh_sub *sh, struct osd_state *osd, void *data,
  54                 int data_len, double pts, double duration)
  55 {
  56     if (sh->active && sh->sd_driver->decode)
  57         sh->sd_driver->decode(sh, osd, data, data_len, pts, duration);
  58 }
  59
  60 void sub_get_bitmaps(struct osd_state *osd, struct sub_bitmaps *res)
  61 {
  62     struct MPOpts *opts = osd->opts;
  63
  64     *res = (struct sub_bitmaps){ .type = SUBBITMAP_EMPTY,
  65                                  .bitmap_id = osd->bitmap_id,
  66                                  .bitmap_pos_id = osd->bitmap_pos_id };
  67     if (!opts->sub_visibility || !osd->sh_sub || !osd->sh_sub->active) {
  68         /* Change ID in case we just switched from visible subtitles
  69          * to current state. Hopefully, unnecessarily claiming that
  70          * things may have changed is harmless for empty contents.
  71          * Increase osd-> values ahead so that _next_ returned id
  72          * is also guaranteed to differ from this one.
  73          */
  74         res->bitmap_id = ++res->bitmap_pos_id;
  75         osd->bitmap_id = osd->bitmap_pos_id += 2;
  76         return;
  77     }
  78     if (osd->sh_sub->sd_driver->get_bitmaps)
  79         osd->sh_sub->sd_driver->get_bitmaps(osd->sh_sub, osd, res);
  80     osd->bitmap_id = res->bitmap_id;
  81     osd->bitmap_pos_id = res->bitmap_pos_id;
  82 }
  83
  84 void sub_reset(struct sh_sub *sh, struct osd_state *osd)
  85 {
  86     if (sh->active && sh->sd_driver->reset)
  87         sh->sd_driver->reset(sh, osd);
  88 }
  89
  90 void sub_switchoff(struct sh_sub *sh, struct osd_state *osd)
  91 {
  92     if (sh->active && sh->sd_driver->switch_off) {
  93         assert(osd->sh_sub == sh);
  94         sh->sd_driver->switch_off(sh, osd);
  95     }
  96     sh->active = false;
  97     osd->sh_sub = NULL;
  98 }
  99
 100 void sub_uninit(struct sh_sub *sh)
 101 {
 102     assert (!sh->active);
 103     if (sh->initialized && sh->sd_driver->uninit)
 104         sh->sd_driver->uninit(sh);
 105     sh->initialized = false;
 106 }