Ignore HMAC discrepencies when reading DCPs.

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

diff --git a/src/lib/dcp_examiner.cc b/src/lib/dcp_examiner.cc
index 89ddfd6eae907b49c3d1d46237275eea6a280ef6..ffdcad1c144fd0030a70eefc6215497fecc783f2 100644 (file)
--- a/src/lib/dcp_examiner.cc
+++ b/src/lib/dcp_examiner.cc
@@ -53,7 +53,10 @@ using std::cout;
 using std::runtime_error;
 using std::map;
 using std::shared_ptr;
+using std::string;
 using std::dynamic_pointer_cast;
+using boost::optional;
+
 
 DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content, bool tolerant)
        : DCP (content, tolerant)
@@ -108,6 +111,15 @@ DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content, bool tolerant)
        _name = cpl->content_title_text ();
        _content_kind = cpl->content_kind ();
 
+       auto try_to_parse_language = [](optional<string> lang) -> boost::optional<dcp::LanguageTag> {
+               try {
+                       if (lang) {
+                               return dcp::LanguageTag (*lang);
+                       }
+               } catch (...) {}
+               return boost::none;
+       };
+
        for (auto i: cpl->reels()) {
 
                if (i->main_picture ()) {
@@ -159,6 +171,7 @@ DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content, bool tolerant)
                        }
 
                        _audio_length += i->main_sound()->actual_duration();
+                       _audio_language = try_to_parse_language (asset->language());
                }
 
                if (i->main_subtitle ()) {
@@ -169,6 +182,7 @@ DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content, bool tolerant)
                        }
 
                        _text_count[static_cast<int>(TextType::OPEN_SUBTITLE)] = 1;
+                       _open_subtitle_language = try_to_parse_language (i->main_subtitle()->language());
                }
 
                for (auto j: i->closed_captions()) {
@@ -179,11 +193,11 @@ DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content, bool tolerant)
                        }
 
                        _text_count[static_cast<int>(TextType::CLOSED_CAPTION)]++;
-                       _dcp_text_tracks.push_back (DCPTextTrack(j->annotation_text(), j->language().get_value_or(_("Unknown"))));
+                       _dcp_text_tracks.push_back (DCPTextTrack(j->annotation_text(), try_to_parse_language(j->language())));
                }
 
                if (i->main_markers ()) {
-                       map<dcp::Marker, dcp::Time> rm = i->main_markers()->get();
+                       auto rm = i->main_markers()->get();
                        _markers.insert (rm.begin(), rm.end());
                }
 
@@ -212,30 +226,57 @@ DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content, bool tolerant)
        _encrypted = cpl->any_encrypted ();
        _kdm_valid = true;
 
-       /* Check that we can read the first picture, sound and subtitle frames of each reel */
+       /* Check first that anything encrypted has a key.  We must do this, as if we try to
+        * read encrypted data with asdcplib without even offering a key it will just return
+        * the encrypted data.  Secondly, check that we can read the first thing from each
+        * asset in each reel.  This checks that when we do have a key it's the right one.
+        */
        try {
                for (auto i: cpl->reels()) {
-                       auto pic = i->main_picture()->asset ();
-                       auto mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (pic);
-                       auto stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (pic);
+                       auto pic = i->main_picture()->asset();
+                       if (pic->encrypted() && !pic->key()) {
+                               _kdm_valid = false;
+                       }
+                       auto mono = dynamic_pointer_cast<dcp::MonoPictureAsset>(pic);
+                       auto stereo = dynamic_pointer_cast<dcp::StereoPictureAsset>(pic);
 
                        if (mono) {
-                               mono->start_read()->get_frame(0)->xyz_image ();
+                               auto reader = mono->start_read();
+                               reader->set_check_hmac (false);
+                               reader->get_frame(0)->xyz_image();
                        } else {
-                               stereo->start_read()->get_frame(0)->xyz_image(dcp::Eye::LEFT);
+                               auto reader = stereo->start_read();
+                               reader->set_check_hmac (false);
+                               reader->get_frame(0)->xyz_image(dcp::Eye::LEFT);
                        }
 
                        if (i->main_sound()) {
-                               shared_ptr<dcp::SoundAsset> sound = i->main_sound()->asset ();
-                               i->main_sound()->asset()->start_read()->get_frame(0);
+                               auto sound = i->main_sound()->asset ();
+                               if (sound->encrypted() && !sound->key()) {
+                                       _kdm_valid = false;
+                               }
+                               auto reader = i->main_sound()->asset()->start_read();
+                               reader->set_check_hmac (false);
+                               reader->get_frame(0);
                        }
 
                        if (i->main_subtitle()) {
-                               i->main_subtitle()->asset()->subtitles ();
+                               auto sub = i->main_subtitle()->asset();
+                               auto mxf_sub = dynamic_pointer_cast<dcp::MXF>(sub);
+                               if (mxf_sub && mxf_sub->encrypted() && !mxf_sub->key()) {
+                                       _kdm_valid = false;
+                               }
+                               sub->subtitles ();
                        }
 
                        if (i->atmos()) {
-                               i->atmos()->asset()->start_read()->get_frame(0);
+                               auto atmos = i->atmos()->asset();
+                               if (atmos->encrypted() && !atmos->key()) {
+                                       _kdm_valid = false;
+                               }
+                               auto reader = atmos->start_read();
+                               reader->set_check_hmac (false);
+                               reader->get_frame(0);
                        }
                }
        } catch (dcp::ReadError& e) {
@@ -244,8 +285,7 @@ DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content, bool tolerant)
                _kdm_valid = false;
        }
 
-       DCPOMATIC_ASSERT (cpl->standard ());
-       _standard = cpl->standard().get();
+       _standard = cpl->standard();
        _three_d = !cpl->reels().empty() && cpl->reels().front()->main_picture() &&
                dynamic_pointer_cast<dcp::StereoPictureAsset> (cpl->reels().front()->main_picture()->asset());
        _ratings = cpl->ratings();