Basic support for decryption of imported DCPs.

9 files changed, 136 insertions, 8 deletions

diff --git a/src/lib/dcp_content.cc b/src/lib/dcp_content.cc
index 0eef075d7..9d4ee6388 100644
--- a/src/lib/dcp_content.cc
+++ b/src/lib/dcp_content.cc
@@ -18,16 +18,22 @@
 */
 
 #include <dcp/dcp.h>
+#include <dcp/exceptions.h>
 #include "dcp_content.h"
 #include "dcp_examiner.h"
 #include "job.h"
 #include "film.h"
+#include "config.h"
 #include "compose.hpp"
 
 #include "i18n.h"
 
 using std::string;
+using std::cout;
 using boost::shared_ptr;
+using boost::optional;
+
+int const DCPContentProperty::CAN_BE_PLAYED = 600;
 
 DCPContent::DCPContent (shared_ptr<const Film> f, boost::filesystem::path p)
 	: Content (f)
@@ -35,7 +41,9 @@ DCPContent::DCPContent (shared_ptr<const Film> f, boost::filesystem::path p)
 	, SingleStreamAudioContent (f)
 	, SubtitleContent (f)
 	, _has_subtitles (false)
+	, _encrypted (false)
 	, _directory (p)
+	, _kdm_valid (false)
 {
 	read_directory (p);
 }
@@ -49,6 +57,8 @@ DCPContent::DCPContent (shared_ptr<const Film> f, cxml::ConstNodePtr node, int v
 	_name = node->string_child ("Name");
 	_has_subtitles = node->bool_child ("HasSubtitles");
 	_directory = node->string_child ("Directory");
+	_encrypted = node->bool_child ("Encrypted");
+	_kdm_valid = node->bool_child ("KDMValid");
 }
 
 void
@@ -66,6 +76,8 @@ DCPContent::read_directory (boost::filesystem::path p)
 void
 DCPContent::examine (shared_ptr<Job> job)
 {
+	bool const could_be_played = can_be_played ();
+		
 	job->set_progress_unknown ();
 	Content::examine (job);
 	
@@ -76,6 +88,12 @@ DCPContent::examine (shared_ptr<Job> job)
 	boost::mutex::scoped_lock lm (_mutex);
 	_name = examiner->name ();
 	_has_subtitles = examiner->has_subtitles ();
+	_encrypted = examiner->encrypted ();
+	_kdm_valid = examiner->kdm_valid ();
+
+	if (could_be_played != can_be_played ()) {
+		signal_changed (DCPContentProperty::CAN_BE_PLAYED);
+	}
 }
 
 string
@@ -106,7 +124,10 @@ DCPContent::as_xml (xmlpp::Node* node) const
 	boost::mutex::scoped_lock lm (_mutex);
 	node->add_child("Name")->add_child_text (_name);
 	node->add_child("HasSubtitles")->add_child_text (_has_subtitles ? "1" : "0");
+	node->add_child("Encrypted")->add_child_text (_encrypted ? "1" : "0");
 	node->add_child("Directory")->add_child_text (_directory.string ());
+	/* XXX: KDM */
+	node->add_child("KDMValid")->add_child_text (_kdm_valid ? "1" : "0");
 }
 
 DCPTime
@@ -123,9 +144,14 @@ DCPContent::identifier () const
 	return SubtitleContent::identifier ();
 }
 
+void
+DCPContent::add_kdm (dcp::EncryptedKDM k)
+{
+	_kdm = k;
+}
+
 bool
-DCPContent::has_subtitles () const
+DCPContent::can_be_played () const
 {
-	boost::mutex::scoped_lock lm (_mutex);
-	return _has_subtitles;
+	return !_encrypted || _kdm_valid;
 }
diff --git a/src/lib/dcp_content.h b/src/lib/dcp_content.h
index 60b7142de..da78e6d72 100644
--- a/src/lib/dcp_content.h
+++ b/src/lib/dcp_content.h
@@ -17,15 +17,26 @@
 
 */
 
+#ifndef DCPOMATIC_DCP_CONTENT_H
+#define DCPOMATIC_DCP_CONTENT_H
+
 /** @file  src/lib/dcp_content.h
  *  @brief DCPContent class.
  */
 
 #include <libcxml/cxml.h>
+#include <dcp/encrypted_kdm.h>
+#include <dcp/decrypted_kdm.h>
 #include "video_content.h"
 #include "single_stream_audio_content.h"
 #include "subtitle_content.h"
 
+class DCPContentProperty
+{
+public:
+	static int const CAN_BE_PLAYED;
+};
+
 /** @class DCPContent
  *  @brief An existing DCP used as input.
  */
@@ -48,17 +59,40 @@ public:
 	std::string identifier () const;
 
 	/* SubtitleContent */
-	bool has_subtitles () const;
+	bool has_subtitles () const {
+		boost::mutex::scoped_lock lm (_mutex);
+		return _has_subtitles;
+	}
 	
 	boost::filesystem::path directory () const {
 		boost::mutex::scoped_lock lm (_mutex);
 		return _directory;
 	}
 
+	bool encrypted () const {
+		boost::mutex::scoped_lock lm (_mutex);
+		return _encrypted;
+	}
+
+	void add_kdm (dcp::EncryptedKDM);
+
+	boost::optional<dcp::EncryptedKDM> kdm () const {
+		return _kdm;
+	}
+
+	bool can_be_played () const;
+	
 private:
 	void read_directory (boost::filesystem::path);
 	
 	std::string _name;
 	bool _has_subtitles;
+	/** true if our DCP is encrypted */
+	bool _encrypted;
 	boost::filesystem::path _directory;
+	boost::optional<dcp::EncryptedKDM> _kdm;
+	/** true if _kdm successfully decrypts the first frame of our DCP */
+	bool _kdm_valid;
 };
+
+#endif
diff --git a/src/lib/dcp_decoder.cc b/src/lib/dcp_decoder.cc
index d0642d8b6..bf016ef87 100644
--- a/src/lib/dcp_decoder.cc
+++ b/src/lib/dcp_decoder.cc
@@ -31,6 +31,7 @@
 #include "dcp_content.h"
 #include "j2k_image_proxy.h"
 #include "image.h"
+#include "config.h"
 
 using std::list;
 using std::cout;
@@ -46,6 +47,9 @@ DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log)
 {
 	dcp::DCP dcp (c->directory ());
 	dcp.read ();
+	if (c->kdm ()) {
+		dcp.add (dcp::DecryptedKDM (c->kdm().get (), Config::instance()->decryption_private_key ()));
+	}
 	assert (dcp.cpls().size() == 1);
 	_reels = dcp.cpls().front()->reels ();
 	_reel = _reels.begin ();
@@ -54,7 +58,7 @@ DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log)
 bool
 DCPDecoder::pass ()
 {
-	if (_reel == _reels.end ()) {
+	if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
 		return true;
 	}
 
diff --git a/src/lib/dcp_examiner.cc b/src/lib/dcp_examiner.cc
index 625276e18..1e4cc899d 100644
--- a/src/lib/dcp_examiner.cc
+++ b/src/lib/dcp_examiner.cc
@@ -22,21 +22,38 @@
 #include <dcp/reel.h>
 #include <dcp/reel_picture_asset.h>
 #include <dcp/reel_sound_asset.h>
+#include <dcp/mono_picture_mxf.h>
+#include <dcp/mono_picture_frame.h>
+#include <dcp/stereo_picture_mxf.h>
+#include <dcp/stereo_picture_frame.h>
 #include <dcp/sound_mxf.h>
 #include "dcp_examiner.h"
 #include "dcp_content.h"
 #include "exceptions.h"
+#include "image.h"
+#include "config.h"
 
 #include "i18n.h"
 
 using std::list;
+using std::cout;
 using boost::shared_ptr;
+using boost::dynamic_pointer_cast;
 
 DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content)
+	: _video_length (0)
+	, _audio_length (0)
+	, _has_subtitles (false)
+	, _encrypted (false)
+	, _kdm_valid (false)
 {
 	dcp::DCP dcp (content->directory ());
 	dcp.read ();
 
+	if (content->kdm ()) {
+		dcp.add (dcp::DecryptedKDM (content->kdm().get(), Config::instance()->decryption_private_key ()));
+	}
+
 	if (dcp.cpls().size() == 0) {
 		throw DCPError ("No CPLs found in DCP");
 	} else if (dcp.cpls().size() > 1) {
@@ -89,4 +106,31 @@ DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content)
 			_has_subtitles = true;
 		}
 	}
+
+	_encrypted = dcp.encrypted ();
+	_kdm_valid = true;
+	
+	/* Check that we can read the first picture frame */
+	try {
+		if (!dcp.cpls().empty () && !dcp.cpls().front()->reels().empty ()) {
+			shared_ptr<dcp::PictureMXF> mxf = dcp.cpls().front()->reels().front()->main_picture()->mxf ();
+			shared_ptr<dcp::MonoPictureMXF> mono = dynamic_pointer_cast<dcp::MonoPictureMXF> (mxf);
+			shared_ptr<dcp::StereoPictureMXF> stereo = dynamic_pointer_cast<dcp::StereoPictureMXF> (mxf);
+			
+			shared_ptr<Image> image (new Image (PIX_FMT_RGB24, _video_size.get(), false));
+			
+			if (mono) {
+				mono->get_frame(0)->rgb_frame (image->data()[0]);
+			} else {
+				stereo->get_frame(0)->rgb_frame (dcp::EYE_LEFT, image->data()[0]);
+			}
+			
+		}
+	} catch (dcp::DCPReadError& e) {
+		_kdm_valid = false;
+		if (_encrypted && content->kdm ()) {
+			/* XXX: maybe don't use an exception for this */
+			throw StringError (_("The KDM does not decrypt the DCP.  Perhaps it is targeted at the wrong CPL"));
+		}
+	}
 }
diff --git a/src/lib/dcp_examiner.h b/src/lib/dcp_examiner.h
index 5b510743b..03d43d0f6 100644
--- a/src/lib/dcp_examiner.h
+++ b/src/lib/dcp_examiner.h
@@ -47,6 +47,10 @@ public:
 		return _has_subtitles;
 	}
 
+	bool encrypted () const {
+		return _encrypted;
+	}
+
 	int audio_channels () const {
 		return _audio_channels.get_value_or (0);
 	}
@@ -59,6 +63,10 @@ public:
 		return _audio_frame_rate.get_value_or (48000);
 	}
 
+	bool kdm_valid () const {
+		return _kdm_valid;
+	}
+
 private:
 	boost::optional<float> _video_frame_rate;
 	boost::optional<dcp::Size> _video_size;
@@ -68,4 +76,6 @@ private:
 	ContentTime _audio_length;
 	std::string _name;
 	bool _has_subtitles;
+	bool _encrypted;
+	bool _kdm_valid;
 };
diff --git a/src/lib/film.cc b/src/lib/film.cc
index c3194eca8..99a668e37 100644
--- a/src/lib/film.cc
+++ b/src/lib/film.cc
@@ -940,6 +940,13 @@ Film::content () const
 }
 
 void
+Film::examine_content (shared_ptr<Content> c)
+{
+	shared_ptr<Job> j (new ExamineContentJob (shared_from_this(), c));
+	JobManager::instance()->add (j);
+}
+
+void
 Film::examine_and_add_content (shared_ptr<Content> c)
 {
 	if (dynamic_pointer_cast<FFmpegContent> (c)) {
@@ -1083,7 +1090,7 @@ Film::make_kdm (
 	}
 	
 	return dcp::DecryptedKDM (
-		cpl, from, until, "DCP-o-matic", cpl->content_title_text(), dcp::LocalTime().as_string()
+		cpl, key(), from, until, "DCP-o-matic", cpl->content_title_text(), dcp::LocalTime().as_string()
 		).encrypt (signer, target, formulation);
 }
 
diff --git a/src/lib/film.h b/src/lib/film.h
index 6c3f78895..dea669d98 100644
--- a/src/lib/film.h
+++ b/src/lib/film.h
@@ -250,6 +250,7 @@ public:
 	void set_directory (boost::filesystem::path);
 	void set_name (std::string);
 	void set_use_isdcf_name (bool);
+	void examine_content (boost::shared_ptr<Content>);
 	void examine_and_add_content (boost::shared_ptr<Content>);
 	void add_content (boost::shared_ptr<Content>);
 	void remove_content (boost::shared_ptr<Content>);
diff --git a/src/lib/player.cc b/src/lib/player.cc
index c8ac591a7..06f9e1365 100644
--- a/src/lib/player.cc
+++ b/src/lib/player.cc
@@ -31,6 +31,7 @@
 #include "subtitle_content.h"
 #include "subrip_decoder.h"
 #include "subrip_content.h"
+#include "dcp_content.h"
 #include "playlist.h"
 #include "job.h"
 #include "image.h"
@@ -189,7 +190,8 @@ Player::content_changed (weak_ptr<Content> w, int property, bool frequent)
 		property == ContentProperty::TRIM_START ||
 		property == ContentProperty::TRIM_END ||
 		property == ContentProperty::PATH ||
-		property == VideoContentProperty::VIDEO_FRAME_TYPE
+		property == VideoContentProperty::VIDEO_FRAME_TYPE ||
+		property == DCPContentProperty::CAN_BE_PLAYED
 		) {
 		
 		_have_valid_pieces = false;
diff --git a/src/lib/video_content.cc b/src/lib/video_content.cc
index a8590ce55..0d9a8fc45 100644
--- a/src/lib/video_content.cc
+++ b/src/lib/video_content.cc
@@ -192,7 +192,7 @@ VideoContent::take_from_video_examiner (shared_ptr<VideoExaminer> d)
 	dcp::Size const vs = d->video_size ();
 	float const vfr = d->video_frame_rate ();
 	ContentTime vl = d->video_length ();
-	
+
 	{
 		boost::mutex::scoped_lock lm (_mutex);
 		_video_size = vs;