mirror of https://github.com/odrling/Aegisub
126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
// Copyright (c) 2011, Thomas Goyne <plorkyeran@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/// @file keyframe.cpp
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/// @see keyframe.h
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/// @ingroup libaegisub
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///
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#include "libaegisub/keyframe.h"
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#include <sstream>
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#include "libaegisub/io.h"
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#include "libaegisub/line_iterator.h"
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#include <boost/algorithm/string/predicate.hpp>
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#include <boost/range/algorithm/copy.hpp>
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namespace {
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std::vector<int> agi_keyframes(std::istream &file) {
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double fps;
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std::string fps_str;
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file >> fps_str;
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file >> fps;
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return std::vector<int>(agi::line_iterator<int>(file), agi::line_iterator<int>());
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}
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std::vector<int> enumerated_keyframes(std::istream &file, char (*func)(std::string const&)) {
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int count = 0;
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std::vector<int> ret;
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for (auto line : agi::line_iterator<std::string>(file)) {
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char c = tolower(func(line));
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if (c == 'i')
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ret.push_back(count++);
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else if (c == 'p' || c == 'b')
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++count;
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}
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return ret;
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}
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std::vector<int> indexed_keyframes(std::istream &file, int (*func)(std::string const&)) {
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std::vector<int> ret;
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for (auto line : agi::line_iterator<std::string>(file)) {
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int frame_no = func(line);
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if (frame_no >= 0)
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ret.push_back(frame_no);
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}
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return ret;
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}
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char xvid(std::string const& line) {
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return line.empty() ? 0 : line[0];
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}
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char divx(std::string const& line) {
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char chrs[] = "IPB";
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for (int i = 0; i < 3; ++i) {
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std::string::size_type pos = line.find(chrs[i]);
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if (pos != line.npos)
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return line[pos];
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}
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return 0;
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}
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char x264(std::string const& line) {
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std::string::size_type pos = line.find("type:");
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if (pos == line.npos || pos + 5 >= line.size()) return 0;
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return line[pos + 5];
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}
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int wwxd(std::string const& line) {
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if (line.empty() || line[0] == '#')
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return -1;
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std::istringstream ss(line);
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int frame_no;
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char frame_type;
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ss >> frame_no >> frame_type;
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if (ss.fail())
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throw agi::keyframe::KeyframeFormatParseError("WWXD keyframe file not in qpfile format");
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if (frame_type == 'I')
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return frame_no;
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return -1;
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}
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}
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namespace agi { namespace keyframe {
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void Save(agi::fs::path const& filename, std::vector<int> const& keyframes) {
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io::Save file(filename);
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std::ostream& of = file.Get();
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of << "# keyframe format v1" << std::endl;
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of << "fps " << 0 << std::endl;
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boost::copy(keyframes, std::ostream_iterator<int>(of, "\n"));
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}
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std::vector<int> Load(agi::fs::path const& filename) {
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auto file = io::Open(filename);
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std::istream &is(*file);
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std::string header;
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getline(is, header);
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if (header == "# keyframe format v1") return agi_keyframes(is);
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if (boost::starts_with(header, "# XviD 2pass stat file")) return enumerated_keyframes(is, xvid);
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if (boost::starts_with(header, "# ffmpeg 2-pass log file, using xvid codec")) return enumerated_keyframes(is, xvid);
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if (boost::starts_with(header, "# avconv 2-pass log file, using xvid codec")) return enumerated_keyframes(is, xvid);
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if (boost::starts_with(header, "##map version")) return enumerated_keyframes(is, divx);
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if (boost::starts_with(header, "#options:")) return enumerated_keyframes(is, x264);
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if (boost::starts_with(header, "# WWXD log file, using qpfile format")) return indexed_keyframes(is, wwxd);
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throw UnknownKeyframeFormatError("File header does not match any known formats");
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}
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} }
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