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/*
Copyright (C) 2016 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 "hints.h"
#include "types.h"
#include "film.h"
#include "content.h"
#include "video_content.h"
#include "subtitle_content.h"
#include "font.h"
#include "ratio.h"
#include "audio_analysis.h"
#include "compose.hpp"
#include "util.h"
#include <dcp/raw_convert.h>
#include <boost/foreach.hpp>
#include <boost/algorithm/string.hpp>
#include "i18n.h"
using std::vector;
using std::string;
using std::max;
using boost::shared_ptr;
using boost::optional;
vector<string>
get_hints (shared_ptr<const Film> film)
{
vector<string> hints;
ContentList content = film->content ();
bool big_font_files = false;
if (film->interop ()) {
BOOST_FOREACH (shared_ptr<Content> i, content) {
if (i->subtitle) {
BOOST_FOREACH (shared_ptr<Font> j, i->subtitle->fonts ()) {
for (int k = 0; k < FontFiles::VARIANTS; ++k) {
optional<boost::filesystem::path> const p = j->file (static_cast<FontFiles::Variant> (k));
if (p && boost::filesystem::file_size (p.get()) >= (640 * 1024)) {
big_font_files = true;
}
}
}
}
}
}
if (big_font_files) {
hints.push_back (_("You have specified a font file which is larger than 640kB. This is very likely to cause problems on playback."));
}
if (film->audio_channels() < 6) {
hints.push_back (_("Your DCP has fewer than 6 audio channels. This may cause problems on some projectors."));
}
int flat_or_narrower = 0;
int scope = 0;
BOOST_FOREACH (shared_ptr<const Content> i, content) {
if (i->video) {
Ratio const * r = i->video->scale().ratio ();
if (r && r->id() == "239") {
++scope;
} else if (r && r->id() != "239" && r->id() != "full-frame") {
++flat_or_narrower;
}
}
}
if (scope && !flat_or_narrower && film->container()->id() == "185") {
hints.push_back (_("All of your content is in Scope (2.39:1) but your DCP's container is Flat (1.85:1). This will letter-box your content inside a Flat (1.85:1) frame. You may prefer to set your DCP's container to Scope (2.39:1) in the \"DCP\" tab."));
}
if (!scope && flat_or_narrower && film->container()->id() == "239") {
hints.push_back (_("All of your content is at 1.85:1 or narrower but your DCP's container is Scope (2.39:1). This will pillar-box your content inside a Flat (1.85:1) frame. You may prefer to set your DCP's container to Flat (1.85:1) in the \"DCP\" tab."));
}
if (film->video_frame_rate() != 24 && film->video_frame_rate() != 48) {
hints.push_back (String::compose (_("Your DCP frame rate (%1 fps) may cause problems in a few (mostly older) projectors. Use 24 or 48 frames per second to be on the safe side."), film->video_frame_rate()));
}
if (film->j2k_bandwidth() >= 245000000) {
hints.push_back (_("A few projectors have problems playing back very high bit-rate DCPs. It is a good idea to drop the JPEG2000 bandwidth down to about 200Mbit/s; this is unlikely to have any visible effect on the image."));
}
if (film->interop() && film->video_frame_rate() != 24 && film->video_frame_rate() != 48) {
hints.push_back (_("You are set up for an Interop DCP at a frame rate which is not officially supported. You are advised to make a SMPTE DCP instead."));
}
int vob = 0;
BOOST_FOREACH (shared_ptr<const Content> i, content) {
if (boost::algorithm::starts_with (i->path(0).filename().string(), "VTS_")) {
++vob;
}
}
if (vob > 1) {
hints.push_back (String::compose (_("You have %1 files that look like they are VOB files from DVD. You should join them to ensure smooth joins between the files."), vob));
}
int three_d = 0;
BOOST_FOREACH (shared_ptr<const Content> i, content) {
if (i->video && i->video->frame_type() != VIDEO_FRAME_TYPE_2D) {
++three_d;
}
}
if (three_d > 0 && !film->three_d()) {
hints.push_back (_("You are using 3D content but your DCP is set to 2D. Set the DCP to 3D if you want to play it back on a 3D system (e.g. Real-D, MasterImage etc.)"));
}
boost::filesystem::path path = film->audio_analysis_path (film->playlist ());
if (boost::filesystem::exists (path)) {
shared_ptr<AudioAnalysis> an (new AudioAnalysis (path));
string ch;
vector<AudioAnalysis::PeakTime> sample_peak = an->sample_peak ();
vector<float> true_peak = an->true_peak ();
for (size_t i = 0; i < sample_peak.size(); ++i) {
float const peak = max (sample_peak[i].peak, true_peak.empty() ? 0 : true_peak[i]);
float const peak_dB = 20 * log10 (peak) + an->gain_correction (film->playlist ());
if (peak_dB > -3) {
ch += dcp::raw_convert<string> (short_audio_channel_name (i)) + ", ";
}
}
ch = ch.substr (0, ch.length() - 2);
if (!ch.empty ()) {
hints.push_back (
String::compose (
_("Your audio level is very high (on %1). You should reduce the gain of your audio content."),
ch
)
);
}
}
return hints;
}
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