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/*
Copyright (C) 2023 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 "compose.hpp"
#include "constants.h"
#include "dcpomatic_assert.h"
#include "font_id_allocator.h"
#include <dcp/reel.h>
#include <dcp/reel_closed_caption_asset.h>
#include <dcp/reel_subtitle_asset.h>
#include <dcp/subtitle_asset.h>
#include <set>
#include <string>
#include <vector>
using std::shared_ptr;
using std::set;
using std::string;
using std::vector;
void
FontIDAllocator::add_fonts_from_reels(vector<shared_ptr<dcp::Reel>> const& reels)
{
int reel_index = 0;
for (auto reel: reels) {
if (auto sub = reel->main_subtitle()) {
if (sub->asset_ref().resolved()) {
add_fonts_from_asset(reel_index, sub->asset());
}
}
for (auto ccap: reel->closed_captions()) {
if (ccap->asset_ref().resolved()) {
add_fonts_from_asset(reel_index, ccap->asset());
}
}
++reel_index;
}
}
void
FontIDAllocator::add_fonts_from_asset(int reel_index, shared_ptr<const dcp::SubtitleAsset> asset)
{
for (auto const& font: asset->font_data()) {
add_font(reel_index, asset->id(), font.first);
}
}
void
FontIDAllocator::add_font(int reel_index, string asset_id, string font_id)
{
auto font = Font(reel_index, asset_id, font_id);
if (!_default_font) {
_default_font = font;
}
_map[font] = 0;
}
void
FontIDAllocator::allocate()
{
/* Last reel index that we have; i.e. the last prefix number that would be used by "old"
* font IDs (i.e. ones before this FontIDAllocator was added and used)
*/
auto const last_reel = std::max_element(
_map.begin(),
_map.end(),
[] (std::pair<Font, int> const& a, std::pair<Font, int> const& b) {
return a.first.reel_index < b.first.reel_index;
})->first.reel_index;
/* Number of times each ID has been used */
std::map<string, int> used_count;
for (auto& font: _map) {
auto const proposed = String::compose("%1_%2", font.first.reel_index, font.first.font_id);
if (used_count.find(proposed) != used_count.end()) {
/* This ID was already used; we need to disambiguate it. Do so by using
* an ID above last_reel
*/
font.second = last_reel + used_count[proposed];
++used_count[proposed];
} else {
/* This ID was not yet used */
used_count[proposed] = 1;
font.second = font.first.reel_index;
}
}
}
string
FontIDAllocator::font_id(int reel_index, string asset_id, string font_id) const
{
auto iter = _map.find(Font(reel_index, asset_id, font_id));
DCPOMATIC_ASSERT(iter != _map.end());
return String::compose("%1_%2", iter->second, font_id);
}
string
FontIDAllocator::default_font_id() const
{
if (_default_font) {
return font_id(_default_font->reel_index, _default_font->asset_id, _default_font->font_id);
}
return "default";
}
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