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/*
Copyright (C) 2012-2021 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/>.
*/
/** @file src/filter.cc
* @brief A class to describe one of FFmpeg's video or audio filters.
*/
#include "dcpomatic_assert.h"
#include "filter.h"
#include <dcp/warnings.h>
LIBDCP_DISABLE_WARNINGS
extern "C" {
#include <libavfilter/avfilter.h>
}
LIBDCP_ENABLE_WARNINGS
#include <algorithm>
#include "i18n.h"
using std::string;
using std::vector;
using boost::optional;
vector<Filter> Filter::_filters;
/** @param id Our id.
* @param name User-visible name.
* @param category User-visible category.
* @param ffmpeg_string String for a FFmpeg filter descriptor.
*/
Filter::Filter(string id, string name, string category, string ffmpeg_string)
: _id(id)
, _name(name)
, _category(category)
, _ffmpeg(ffmpeg_string)
{
}
/** @return All available filters */
vector<Filter>
Filter::all ()
{
return _filters;
}
/** Set up the static _filters vector; must be called before from_*
* methods are used.
*/
void
Filter::setup_filters ()
{
/* Note: "none" is a magic id name, so don't use it here */
auto maybe_add = [](string id, string name, string category, string ffmpeg)
{
string check_name = ffmpeg;
size_t end = check_name.find("=");
if (end != string::npos) {
check_name = check_name.substr(0, end);
}
if (avfilter_get_by_name(check_name.c_str())) {
_filters.push_back(Filter(id, name, category, ffmpeg));
}
};
maybe_add (N_("vflip"), _("Vertical flip"), _("Orientation"), N_("vflip"));
maybe_add (N_("hflip"), _("Horizontal flip"), _("Orientation"), N_("hflip"));
maybe_add (N_("90clock"), _("Rotate 90 degrees clockwise"), _("Orientation"), N_("transpose=dir=clock"));
maybe_add (N_("90anticlock"), _("Rotate 90 degrees anti-clockwise"), _("Orientation"), N_("transpose=dir=cclock"));
maybe_add (N_("mcdeint"), _("Motion compensating deinterlacer"), _("De-interlacing"), N_("mcdeint"));
maybe_add (N_("kerndeint"), _("Kernel deinterlacer"), _("De-interlacing"), N_("kerndeint"));
maybe_add (N_("yadif"), _("Yet Another Deinterlacing Filter"), _("De-interlacing"), N_("yadif"));
maybe_add (N_("bwdif"), _("Bob Weaver Deinterlacing Filter"), _("De-interlacing"), N_("bwdif"));
maybe_add (N_("weave"), _("Weave filter"), _("De-interlacing"), N_("weave"));
maybe_add (N_("gradfun"), _("Gradient debander"), _("Misc"), N_("gradfun"));
maybe_add (N_("unsharp"), _("Unsharp mask and Gaussian blur"), _("Misc"), N_("unsharp"));
maybe_add (N_("denoise3d"), _("3D denoiser"), _("Noise reduction"), N_("denoise3d"));
maybe_add (N_("hqdn3d"), _("High quality 3D denoiser"), _("Noise reduction"), N_("hqdn3d"));
maybe_add (N_("telecine"), _("Telecine filter"), _("Misc"), N_("telecine"));
maybe_add (N_("ow"), _("Overcomplete wavelet denoiser"), _("Noise reduction"), N_("mp=ow"));
maybe_add (N_("premultiply"), _("Premultiply alpha channel"), _("Misc"), N_("premultiply=inplace=1"));
}
/** @param filters Set of filters.
* @return String to pass to FFmpeg for the video filters.
*/
string
Filter::ffmpeg_string(vector<Filter> const& filters)
{
string ff;
for (auto const& i: filters) {
if (!ff.empty ()) {
ff += N_(",");
}
ff += i.ffmpeg();
}
return ff;
}
/** @param d Our id.
* @return Corresponding Filter, if found.
*/
optional<Filter>
Filter::from_id(string id)
{
auto iter = std::find_if(_filters.begin(), _filters.end(), [id](Filter const& filter) { return filter.id() == id; });
if (iter == _filters.end()) {
return {};
}
return *iter;
}
bool
operator==(Filter const& a, Filter const& b)
{
return a.id() == b.id() && a.name() == b.name() && a.category() == b.category() && a.ffmpeg() == b.ffmpeg();
}
bool
operator!=(Filter const& a, Filter const& b)
{
return a.id() != b.id() || a.name() != b.name() || a.category() != b.category() || a.ffmpeg() != b.ffmpeg();
}
bool
operator<(Filter const& a, Filter const& b)
{
if (a.id() != b.id()) {
return a.id() < b.id();
}
if (a.name() != b.name()) {
return a.name() < b.name();
}
if (a.category() != b.category()) {
return a.category() < b.category();
}
return a.ffmpeg() < b.ffmpeg();
}
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