/*
- Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of libdcp.
+
+ libdcp is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ libdcp is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
*/
/** @file src/smpte_subtitle_asset.cc
#include "smpte_subtitle_asset.h"
#include "smpte_load_font_node.h"
-#include "font_node.h"
#include "exceptions.h"
#include "xml.h"
#include "raw_convert.h"
#include "dcp_assert.h"
#include "util.h"
-#include "AS_DCP.h"
-#include "KM_util.h"
#include "compose.hpp"
+#include "encryption_context.h"
+#include "decryption_context.h"
+#include <asdcp/AS_DCP.h>
+#include <asdcp/KM_util.h>
#include <libxml++/libxml++.h>
#include <boost/foreach.hpp>
#include <boost/algorithm/string.hpp>
using std::string;
using std::list;
-using std::stringstream;
-using std::cout;
using std::vector;
using std::map;
using boost::shared_ptr;
shared_ptr<cxml::Document> xml (new cxml::Document ("SubtitleReel"));
shared_ptr<ASDCP::TimedText::MXFReader> reader (new ASDCP::TimedText::MXFReader ());
- Kumu::Result_t r = reader->OpenRead (file.string().c_str ());
-
+ Kumu::Result_t r = reader->OpenRead (_file->string().c_str ());
if (!ASDCP_FAILURE (r)) {
- string s;
- reader->ReadTimedTextResource (s, 0, 0);
- stringstream t;
- t << s;
- xml->read_stream (t);
+ /* MXF-wrapped */
ASDCP::WriterInfo info;
reader->FillWriterInfo (info);
_id = read_writer_info (info);
+ if (!_key_id) {
+ /* Not encrypted; read it in now */
+ string s;
+ reader->ReadTimedTextResource (s);
+ xml->read_string (s);
+ parse_xml (xml);
+ read_mxf_descriptor (reader, shared_ptr<DecryptionContext> (new DecryptionContext ()));
+ }
} else {
- reader.reset ();
+ /* Plain XML */
try {
+ xml.reset (new cxml::Document ("SubtitleReel"));
xml->read_file (file);
- _id = xml->string_child ("Id").substr (9);
+ parse_xml (xml);
+ _id = remove_urn_uuid (xml->string_child ("Id"));
} catch (cxml::Error& e) {
boost::throw_exception (
DCPReadError (
- String::compose ("could not read subtitles from %1; MXF failed with %2, XML failed with %3", file, static_cast<int> (r), e.what ())
+ String::compose (
+ "Failed to read subtitle file %1; MXF failed with %2, XML failed with %3",
+ file, static_cast<int> (r), e.what ()
+ )
)
);
}
}
+}
+void
+SMPTESubtitleAsset::parse_xml (shared_ptr<cxml::Document> xml)
+{
_load_font_nodes = type_children<dcp::SMPTELoadFontNode> (xml, "LoadFont");
_content_title_text = xml->string_child ("ContentTitleText");
_start_time = Time (xml->string_child ("StartTime"), _time_code_rate);
}
- shared_ptr<cxml::Node> subtitle_list = xml->optional_node_child ("SubtitleList");
+ /* Now we need to drop down to xmlpp */
- list<cxml::NodePtr> f = subtitle_list->node_children ("Font");
- list<shared_ptr<dcp::FontNode> > font_nodes;
- BOOST_FOREACH (cxml::NodePtr& i, f) {
- font_nodes.push_back (shared_ptr<FontNode> (new FontNode (i, _time_code_rate)));
+ list<ParseState> ps;
+ xmlpp::Node::NodeList c = xml->node()->get_children ();
+ for (xmlpp::Node::NodeList::const_iterator i = c.begin(); i != c.end(); ++i) {
+ xmlpp::Element const * e = dynamic_cast<xmlpp::Element const *> (*i);
+ if (e && e->get_name() == "SubtitleList") {
+ parse_subtitles (e, ps, _time_code_rate, SMPTE);
+ }
}
- parse_subtitles (xml, font_nodes);
+ /* Guess intrinsic duration */
+ _intrinsic_duration = latest_subtitle_out().as_editable_units (_edit_rate.numerator / _edit_rate.denominator);
+}
- if (reader) {
- ASDCP::TimedText::TimedTextDescriptor descriptor;
- reader->FillTimedTextDescriptor (descriptor);
+void
+SMPTESubtitleAsset::read_mxf_descriptor (shared_ptr<ASDCP::TimedText::MXFReader> reader, shared_ptr<DecryptionContext> dec)
+{
+ ASDCP::TimedText::TimedTextDescriptor descriptor;
+ reader->FillTimedTextDescriptor (descriptor);
- /* Load fonts */
+ /* Load fonts */
- for (
- ASDCP::TimedText::ResourceList_t::const_iterator i = descriptor.ResourceList.begin();
- i != descriptor.ResourceList.end();
- ++i) {
+ for (
+ ASDCP::TimedText::ResourceList_t::const_iterator i = descriptor.ResourceList.begin();
+ i != descriptor.ResourceList.end();
+ ++i) {
- if (i->Type == ASDCP::TimedText::MT_OPENTYPE) {
- ASDCP::TimedText::FrameBuffer buffer;
- buffer.Capacity (10 * 1024 * 1024);
- reader->ReadAncillaryResource (i->ResourceID, buffer);
+ if (i->Type == ASDCP::TimedText::MT_OPENTYPE) {
+ ASDCP::TimedText::FrameBuffer buffer;
+ buffer.Capacity (10 * 1024 * 1024);
+ reader->ReadAncillaryResource (i->ResourceID, buffer, dec->decryption());
- char id[64];
- Kumu::bin2UUIDhex (i->ResourceID, ASDCP::UUIDlen, id, sizeof (id));
+ char id[64];
+ Kumu::bin2UUIDhex (i->ResourceID, ASDCP::UUIDlen, id, sizeof (id));
- shared_array<uint8_t> data (new uint8_t[buffer.Size()]);
- memcpy (data.get(), buffer.RoData(), buffer.Size());
+ shared_array<uint8_t> data (new uint8_t[buffer.Size()]);
+ memcpy (data.get(), buffer.RoData(), buffer.Size());
- list<shared_ptr<SMPTELoadFontNode> >::const_iterator j = _load_font_nodes.begin ();
- while (j != _load_font_nodes.end() && (*j)->urn != id) {
- ++j;
- }
+ list<shared_ptr<SMPTELoadFontNode> >::const_iterator j = _load_font_nodes.begin ();
+ while (j != _load_font_nodes.end() && (*j)->urn != id) {
+ ++j;
+ }
- if (j != _load_font_nodes.end ()) {
- _fonts.push_back (Font ((*j)->id, (*j)->urn, Data (data, buffer.Size ())));
- }
+ if (j != _load_font_nodes.end ()) {
+ _fonts.push_back (Font ((*j)->id, (*j)->urn, Data (data, buffer.Size ())));
}
}
+ }
- /* Get intrinsic duration */
- _intrinsic_duration = descriptor.ContainerDuration;
- } else {
- /* Guess intrinsic duration */
- _intrinsic_duration = latest_subtitle_out().as_editable_units (_edit_rate.numerator / _edit_rate.denominator);
+ /* Get intrinsic duration */
+ _intrinsic_duration = descriptor.ContainerDuration;
+}
+
+void
+SMPTESubtitleAsset::set_key (Key key)
+{
+ /* See if we already have a key; if we do, and we have a file, we'll already
+ have read that file.
+ */
+ bool const had_key = static_cast<bool> (_key);
+
+ MXF::set_key (key);
+
+ if (!_key_id || !_file || had_key) {
+ /* Either we don't have any data to read, it wasn't
+ encrypted, or we've already read it, so we don't
+ need to do anything else.
+ */
+ return;
+ }
+
+ /* Our data was encrypted; now we can decrypt it */
+
+ shared_ptr<ASDCP::TimedText::MXFReader> reader (new ASDCP::TimedText::MXFReader ());
+ Kumu::Result_t r = reader->OpenRead (_file->string().c_str ());
+ if (ASDCP_FAILURE (r)) {
+ boost::throw_exception (
+ DCPReadError (
+ String::compose ("Could not read encrypted subtitle MXF (%1)", static_cast<int> (r))
+ )
+ );
}
+
+ string s;
+ shared_ptr<DecryptionContext> dec (new DecryptionContext (key));
+ reader->ReadTimedTextResource (s, dec->decryption());
+ shared_ptr<cxml::Document> xml (new cxml::Document ("SubtitleReel"));
+ xml->read_string (s);
+ parse_xml (xml);
+ read_mxf_descriptor (reader, dec);
}
list<shared_ptr<LoadFontNode> >
return !ASDCP_FAILURE (r);
}
-Glib::ustring
+string
SMPTESubtitleAsset::xml_as_string () const
{
xmlpp::Document doc;
subtitles_as_xml (root->add_child ("SubtitleList", "dcst"), _time_code_rate, SMPTE);
- return doc.write_to_string_formatted ("UTF-8");
+ return doc.write_to_string ("UTF-8");
}
/** Write this content to a MXF file */
void
SMPTESubtitleAsset::write (boost::filesystem::path p) const
{
+ EncryptionContext enc (key (), SMPTE);
+
ASDCP::WriterInfo writer_info;
fill_writer_info (&writer_info, _id, SMPTE);
}
/* XXX: no encryption */
- r = writer.WriteTimedTextResource (xml_as_string ());
+ r = writer.WriteTimedTextResource (xml_as_string (), enc.encryption(), enc.hmac());
if (ASDCP_FAILURE (r)) {
boost::throw_exception (MXFFileError ("could not write XML to timed text resource", p.string(), r));
}
}
if (j != _fonts.end ()) {
ASDCP::TimedText::FrameBuffer buffer;
- buffer.SetData (j->data.data.get(), j->data.size);
- buffer.Size (j->data.size);
- r = writer.WriteAncillaryResource (buffer);
+ buffer.SetData (j->data.data().get(), j->data.size());
+ buffer.Size (j->data.size());
+ r = writer.WriteAncillaryResource (buffer, enc.encryption(), enc.hmac());
if (ASDCP_FAILURE (r)) {
boost::throw_exception (MXFFileError ("could not write font to timed text resource", p.string(), r));
}
projects / libdcp.git / blobdiff