Bv2.1 7.2.3: Check that subtitle <StartTime> exists and is 0.

[libdcp.git] / src / subtitle_image.cc

diff --git a/src/subtitle_image.cc b/src/subtitle_image.cc
index d8215850784e6abb1c1255165e7fcd3bdf6b2dc5..99d63d27b8bf4c32f9b163f3364318941d55f19a 100644 (file)
--- a/src/subtitle_image.cc
+++ b/src/subtitle_image.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2018 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2018-2020 Carl Hetherington <cth@carlh.net>
 
     This file is part of libdcp.
 
@@ -36,6 +36,7 @@
 
 using std::ostream;
 using std::string;
+using std::shared_ptr;
 using namespace dcp;
 
 SubtitleImage::SubtitleImage (
@@ -112,6 +113,71 @@ dcp::operator!= (SubtitleImage const & a, SubtitleImage const & b)
        return !(a == b);
 }
 
+bool
+SubtitleImage::equals (shared_ptr<SubtitleImage> other, EqualityOptions options, NoteHandler note)
+{
+       if (png_image() != other->png_image()) {
+               note (DCP_ERROR, "subtitle image PNG data differs");
+               if (options.export_differing_subtitles) {
+                       string const base = "dcpdiff_subtitle_";
+                       if (boost::filesystem::exists(base + "A.png")) {
+                               note (DCP_ERROR, "could not export subtitle as " + base + "A.png already exists");
+                       } else {
+                               png_image().write(base + "A.png");
+                       }
+                       if (boost::filesystem::exists(base + "B.png")) {
+                               note (DCP_ERROR, "could not export subtitle as " + base + "B.png already exists");
+                       } else {
+                               other->png_image().write(base + "B.png");
+                       }
+                       options.export_differing_subtitles = false;
+               }
+               return false;
+       }
+
+       if (in() != other->in()) {
+               note (DCP_ERROR, "subtitle in times differ");
+               return false;
+       }
+
+       if (out() != other->out()) {
+               note (DCP_ERROR, "subtitle out times differ");
+               return false;
+       }
+
+       if (h_position() != other->h_position()) {
+               note (DCP_ERROR, "subtitle horizontal positions differ");
+               return false;
+       }
+
+       if (h_align() != other->h_align()) {
+               note (DCP_ERROR, "subtitle horizontal alignments differ");
+               return false;
+       }
+
+       if (v_position() != other->v_position()) {
+               note (DCP_ERROR, "subtitle vertical positions differ");
+               return false;
+       }
+
+       if (v_align() != other->v_align()) {
+               note (DCP_ERROR, "subtitle vertical alignments differ");
+               return false;
+       }
+
+       if (fade_up_time() != other->fade_up_time()) {
+               note (DCP_ERROR, "subtitle fade-up times differ");
+               return false;
+       }
+
+       if (fade_down_time() != other->fade_down_time()) {
+               note (DCP_ERROR, "subtitle fade-down times differ");
+               return false;
+       }
+
+       return true;
+}
+
 ostream&
 dcp::operator<< (ostream& s, SubtitleImage const & sub)
 {
@@ -122,3 +188,4 @@ dcp::operator<< (ostream& s, SubtitleImage const & sub)
 
        return s;
 }
+