Merge master.

[dcpomatic.git] / src / lib / subtitle_decoder.cc

diff --git a/src/lib/subtitle_decoder.cc b/src/lib/subtitle_decoder.cc
index 3daa6e431820ef5b249c1a86ceacc27cf5d85f84..13cf481c8027f70e0b468235ef0736cf47278570 100644 (file)
--- a/src/lib/subtitle_decoder.cc
+++ b/src/lib/subtitle_decoder.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -19,12 +19,15 @@
 
 #include <boost/shared_ptr.hpp>
 #include "subtitle_decoder.h"
+#include "subtitle_content.h"
 
 using std::list;
+using std::cout;
 using boost::shared_ptr;
 using boost::optional;
 
-SubtitleDecoder::SubtitleDecoder ()
+SubtitleDecoder::SubtitleDecoder (shared_ptr<const SubtitleContent> c)
+       : _subtitle_content (c)
 {
 
 }
@@ -33,9 +36,9 @@ SubtitleDecoder::SubtitleDecoder ()
  *  Image may be 0 to say that there is no current subtitle.
  */
 void
-SubtitleDecoder::image_subtitle (ContentTime from, ContentTime to, shared_ptr<Image> image, dcpomatic::Rect<double> rect)
+SubtitleDecoder::image_subtitle (ContentTimePeriod period, shared_ptr<Image> image, dcpomatic::Rect<double> rect)
 {
-       _decoded_image_subtitles.push_back (shared_ptr<ContentImageSubtitle> (new ContentImageSubtitle (from, to, image, rect)));
+       _decoded_image_subtitles.push_back (shared_ptr<ContentImageSubtitle> (new ContentImageSubtitle (period, image, rect)));
 }
 
 void
@@ -46,12 +49,29 @@ SubtitleDecoder::text_subtitle (list<dcp::SubtitleString> s)
 
 template <class T>
 list<shared_ptr<T> >
-get (list<shared_ptr<T> > const & subs, ContentTime from, ContentTime to)
+SubtitleDecoder::get (list<shared_ptr<T> > const & subs, ContentTimePeriod period)
 {
+       if (!_subtitle_content->has_subtitle_during (period)) {
+               return list<shared_ptr<T> > ();
+       }
+
+       if (subs.empty() || period.from < subs.front()->period().from || period.to > (subs.back()->period().to + ContentTime::from_seconds (10))) {
+               /* Either we have no decoded data, or what we do have is a long way from what we want: seek */
+               seek (period.from, true);
+       }
+
+       /* Now enough pass() calls will either:
+        *  (a) give us what we want, or
+        *  (b) hit the end of the decoder.
+        */
+       while (!pass() && (subs.empty() || (subs.front()->period().from > period.from || period.to < subs.back()->period().to))) {}
+
+       /* Now look for what we wanted in the data we have collected */
        /* XXX: inefficient */
+       
        list<shared_ptr<T> > out;
        for (typename list<shared_ptr<T> >::const_iterator i = subs.begin(); i != subs.end(); ++i) {
-               if ((*i)->from() <= to && (*i)->to() >= from) {
+               if ((*i)->period().from <= period.to && (*i)->period().to >= period.from) {
                        out.push_back (*i);
                }
        }
@@ -60,13 +80,20 @@ get (list<shared_ptr<T> > const & subs, ContentTime from, ContentTime to)
 }
 
 list<shared_ptr<ContentTextSubtitle> >
-SubtitleDecoder::get_text_subtitles (ContentTime from, ContentTime to)
+SubtitleDecoder::get_text_subtitles (ContentTimePeriod period)
 {
-       return get<ContentTextSubtitle> (_decoded_text_subtitles, from, to);
+       return get<ContentTextSubtitle> (_decoded_text_subtitles, period);
 }
 
 list<shared_ptr<ContentImageSubtitle> >
-SubtitleDecoder::get_image_subtitles (ContentTime from, ContentTime to)
+SubtitleDecoder::get_image_subtitles (ContentTimePeriod period)
+{
+       return get<ContentImageSubtitle> (_decoded_image_subtitles, period);
+}
+
+void
+SubtitleDecoder::seek (ContentTime, bool)
 {
-       return get<ContentImageSubtitle> (_decoded_image_subtitles, from, to);
+       _decoded_text_subtitles.clear ();
+       _decoded_image_subtitles.clear ();
 }