Basics of DCP import.

1 files changed, 84 insertions, 0 deletions

diff --git a/src/lib/dcp_examiner.cc b/src/lib/dcp_examiner.cc
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+++ b/src/lib/dcp_examiner.cc
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+/*
+    Copyright (C) 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
+    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,
+    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.
+
+*/
+
+#include <dcp/dcp.h>
+#include <dcp/cpl.h>
+#include <dcp/reel.h>
+#include <dcp/reel_picture_asset.h>
+#include <dcp/reel_sound_asset.h>
+#include <dcp/sound_mxf.h>
+#include "dcp_examiner.h"
+#include "dcp_content.h"
+#include "exceptions.h"
+
+#include "i18n.h"
+
+using std::list;
+using boost::shared_ptr;
+
+DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content)
+{
+	dcp::DCP dcp (content->directory ());
+	dcp.read ();
+
+	if (dcp.cpls().size() == 0) {
+		throw DCPError ("No CPLs found in DCP");
+	} else if (dcp.cpls().size() > 1) {
+		throw DCPError ("Multiple CPLs found in DCP");
+	}
+
+	list<shared_ptr<dcp::Reel> > reels = dcp.cpls().front()->reels ();
+	for (list<shared_ptr<dcp::Reel> >::const_iterator i = reels.begin(); i != reels.end(); ++i) {
+
+		if ((*i)->main_picture ()) {
+			dcp::Fraction const frac = (*i)->main_picture()->frame_rate ();
+			float const fr = float(frac.numerator) / frac.denominator;
+			if (!_video_frame_rate) {
+				_video_frame_rate = fr;
+			} else if (_video_frame_rate.get() != fr) {
+				throw DCPError (_("Mismatched frame rates in DCP"));
+			}
+
+			shared_ptr<dcp::PictureMXF> mxf = (*i)->main_picture()->mxf ();
+			if (!_video_size) {
+				_video_size = mxf->size ();
+			} else if (_video_size.get() != mxf->size ()) {
+				throw DCPError (_("Mismatched video sizes in DCP"));
+			}
+
+			_video_length += ContentTime::from_frames ((*i)->main_picture()->duration(), _video_frame_rate.get ());
+		}
+			
+		if ((*i)->main_sound ()) {
+			shared_ptr<dcp::SoundMXF> mxf = (*i)->main_sound()->mxf ();
+
+			if (!_audio_channels) {
+				_audio_channels = mxf->channels ();
+			} else if (_audio_channels.get() != mxf->channels ()) {
+				throw DCPError (_("Mismatched audio channel counts in DCP"));
+			}
+
+			if (!_audio_frame_rate) {
+				_audio_frame_rate = mxf->sampling_rate ();
+			} else if (_audio_frame_rate.get() != mxf->sampling_rate ()) {
+				throw DCPError (_("Mismatched audio frame rates in DCP"));
+			}
+		}
+	}
+}