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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 "atmos_mxf_content.h"
#include "dcp_content.h"
#include "dcp_decoder.h"
#include "dcpomatic_assert.h"
#include "film.h"
#include "playlist.h"
#include "reusable_reel_asset.h"
#include <dcp/reel.h>
#include <dcp/reel_asset.h>
#include <dcp/reel_atmos_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::make_shared;
using std::max;
using std::min;
using std::shared_ptr;
using std::dynamic_pointer_cast;
using boost::scoped_ptr;
using namespace dcpomatic;
static void
maybe_add_asset(list<ReusableReelAsset>& a, shared_ptr<dcp::ReelFileAsset> r, Frame reel_trim_start, Frame reel_trim_end, DCPTime from, int const ffr, bool reference)
{
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 (
ReusableReelAsset(
r,
DCPTimePeriod(from, from + DCPTime::from_frames(r->actual_duration(), ffr)),
reference ? ReuseType::REFERENCE : ReuseType::COPY
)
);
}
}
static
void
add_reusable_reel_assets_from_dcp(shared_ptr<const Film> film, shared_ptr<const DCPContent> dcp, list<ReusableReelAsset>& reel_assets)
{
if (
!dcp->can_reuse_video(film, {}) &&
!dcp->can_reuse_audio(film, {}) &&
!dcp->can_reuse_text(film, TextType::OPEN_SUBTITLE, {}) &&
!dcp->can_reuse_text(film, TextType::CLOSED_CAPTION, {})
) {
return;
}
scoped_ptr<DCPDecoder> decoder;
try {
decoder.reset(new DCPDecoder(film, dcp, false, false, shared_ptr<DCPDecoder>()));
} catch (...) {
return;
}
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 = dcp->position() + std::max(DCPTime(), DCPTime::from_frames(offset_from_start - trim_start, frame_rate));
if (dcp->can_reuse_video(film, {})) {
maybe_add_asset(reel_assets, reel->main_picture(), reel_trim_start, reel_trim_end, from, frame_rate, dcp->reference_video());
}
if (dcp->can_reuse_audio(film, {})) {
maybe_add_asset(reel_assets, reel->main_sound(), reel_trim_start, reel_trim_end, from, frame_rate, dcp->reference_audio());
}
if (dcp->can_reuse_text(film, TextType::OPEN_SUBTITLE, {}) && reel->main_subtitle()) {
maybe_add_asset(reel_assets, reel->main_subtitle(), reel_trim_start, reel_trim_end, from, frame_rate, dcp->reference_text(TextType::OPEN_SUBTITLE));
}
if (dcp->can_reuse_text(film, TextType::CLOSED_CAPTION, {})) {
for (auto caption: reel->closed_captions()) {
maybe_add_asset(reel_assets, caption, reel_trim_start, reel_trim_end, from, frame_rate, dcp->reference_text(TextType::CLOSED_CAPTION));
}
}
offset_from_start += reel_duration;
offset_from_end -= reel_duration;
}
}
static
void
add_reusable_reel_assets_for_atmos(shared_ptr<const Film> film, shared_ptr<const AtmosMXFContent> atmos, list<ReusableReelAsset>& reel_assets)
{
if (!atmos->can_reuse(film)) {
return;
}
auto const vfr = film->video_frame_rate();
auto asset = make_shared<dcp::AtmosAsset>(atmos->path(0));
auto period = atmos->period(film);
auto entry_point = atmos->trim_start().frames_round(vfr);
for (auto reel: film->reels()) {
if (reel.overlap(period)) {
/* We already checked that the trimmed Atmos content overlaps complete reels,
* so we can assume that here.
*/
auto reel_asset = make_shared<dcp::ReelAtmosAsset>(asset, entry_point);
reel_asset->set_duration(reel.duration().frames_round(vfr));
entry_point += reel_asset->actual_duration();
reel_assets.push_back(
ReusableReelAsset(reel_asset, reel, ReuseType::COPY)
);
}
}
}
/** @return Details of all the DCP assets in a playlist that are marked to refer to */
list<ReusableReelAsset>
get_reusable_reel_assets(shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
{
list<ReusableReelAsset> reel_assets;
for (auto content: playlist->content()) {
if (auto dcp = dynamic_pointer_cast<DCPContent>(content)) {
add_reusable_reel_assets_from_dcp(film, dcp, reel_assets);
} else if (auto atmos = dynamic_pointer_cast<AtmosMXFContent>(content)) {
add_reusable_reel_assets_for_atmos(film, atmos, reel_assets);
}
}
return reel_assets;
}
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