+/*
+ 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;
+}
+