Move get_reel_assets() out of Player, as it doesn't need to be there.

1 files changed, 136 insertions, 0 deletions

diff --git a/src/lib/referenced_reel_asset.cc b/src/lib/referenced_reel_asset.cc
new file mode 100644
index 000000000..bd87b905a
--- /dev/null
+++ b/src/lib/referenced_reel_asset.cc
@@ -0,0 +1,136 @@
+/*
+    Copyright (C) 2015 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic 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.
+
+    DCP-o-matic 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 DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "dcp_content.h"
+#include "dcp_decoder.h"
+#include "dcpomatic_assert.h"
+#include "film.h"
+#include "playlist.h"
+#include "referenced_reel_asset.h"
+#include <dcp/reel.h>
+#include <dcp/reel_asset.h>
+#include <dcp/reel_closed_caption_asset.h>
+#include <dcp/reel_picture_asset.h>
+#include <dcp/reel_sound_asset.h>
+#include <dcp/reel_subtitle_asset.h>
+#include <cmath>
+
+
+using std::list;
+using std::max;
+using std::min;
+using std::shared_ptr;
+using boost::dynamic_pointer_cast;
+using boost::scoped_ptr;
+using namespace dcpomatic;
+
+
+static void
+maybe_add_asset (list<ReferencedReelAsset>& a, shared_ptr<dcp::ReelAsset> r, Frame reel_trim_start, Frame reel_trim_end, DCPTime from, int const ffr)
+{
+	DCPOMATIC_ASSERT (r);
+	r->set_entry_point (r->entry_point().get_value_or(0) + reel_trim_start);
+	r->set_duration (r->actual_duration() - reel_trim_start - reel_trim_end);
+	if (r->actual_duration() > 0) {
+		a.push_back (
+			ReferencedReelAsset(r, DCPTimePeriod(from, from + DCPTime::from_frames(r->actual_duration(), ffr)))
+			);
+	}
+}
+
+
+
+/** @return Details of all the DCP assets in a playlist that are marked to refer to */
+list<ReferencedReelAsset>
+get_referenced_reel_assets(shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
+{
+	list<ReferencedReelAsset> reel_assets;
+
+	for (auto content: playlist->content()) {
+		auto dcp = dynamic_pointer_cast<DCPContent>(content);
+		if (!dcp) {
+			continue;
+		}
+
+		if (!dcp->reference_video() && !dcp->reference_audio() && !dcp->reference_text(TextType::OPEN_SUBTITLE) && !dcp->reference_text(TextType::CLOSED_CAPTION)) {
+			continue;
+		}
+
+		scoped_ptr<DCPDecoder> decoder;
+		try {
+			decoder.reset(new DCPDecoder(film, dcp, false, false, shared_ptr<DCPDecoder>()));
+		} catch (...) {
+			return reel_assets;
+		}
+
+		auto const frame_rate = film->video_frame_rate();
+		DCPOMATIC_ASSERT (dcp->video_frame_rate());
+		/* We should only be referencing if the DCP rate is the same as the film rate */
+		DCPOMATIC_ASSERT (std::round(dcp->video_frame_rate().get()) == frame_rate);
+
+		Frame const trim_start = dcp->trim_start().frames_round(frame_rate);
+		Frame const trim_end = dcp->trim_end().frames_round(frame_rate);
+
+		/* position in the asset from the start */
+		int64_t offset_from_start = 0;
+		/* position i the asset from the end */
+		int64_t offset_from_end = 0;
+		for (auto reel: decoder->reels()) {
+			/* Assume that main picture duration is the length of the reel */
+			offset_from_end += reel->main_picture()->actual_duration();
+		}
+
+		for (auto reel: decoder->reels()) {
+
+			/* Assume that main picture duration is the length of the reel */
+			int64_t const reel_duration = reel->main_picture()->actual_duration();
+
+			/* See doc/design/trim_reels.svg */
+			Frame const reel_trim_start = min(reel_duration, max(int64_t(0), trim_start - offset_from_start));
+			Frame const reel_trim_end =   min(reel_duration, max(int64_t(0), reel_duration - (offset_from_end - trim_end)));
+
+			auto const from = content->position() + std::max(DCPTime(), DCPTime::from_frames(offset_from_start - trim_start, frame_rate));
+			if (dcp->reference_video()) {
+				maybe_add_asset (reel_assets, reel->main_picture(), reel_trim_start, reel_trim_end, from, frame_rate);
+			}
+
+			if (dcp->reference_audio()) {
+				maybe_add_asset (reel_assets, reel->main_sound(), reel_trim_start, reel_trim_end, from, frame_rate);
+			}
+
+			if (dcp->reference_text(TextType::OPEN_SUBTITLE)) {
+				maybe_add_asset (reel_assets, reel->main_subtitle(), reel_trim_start, reel_trim_end, from, frame_rate);
+			}
+
+			if (dcp->reference_text(TextType::CLOSED_CAPTION)) {
+				for (auto caption: reel->closed_captions()) {
+					maybe_add_asset (reel_assets, caption, reel_trim_start, reel_trim_end, from, frame_rate);
+				}
+			}
+
+			offset_from_start += reel_duration;
+			offset_from_end -= reel_duration;
+		}
+	}
+
+	return reel_assets;
+}
+