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/*
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_picture_asset.h>
#include <dcp/reel_sound_asset.h>
#include <dcp/reel_text_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::abs(dcp->video_frame_rate().get() - frame_rate.as_float()) < 1e-3);
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) && reel->main_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;
}
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