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Remove FMPS parser

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This commit is contained in:
Jonas Kvinge 2020-08-21 22:38:40 +02:00
parent 8f32038891
commit f645099a39
5 changed files with 1 additions and 236 deletions
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2
ext/libstrawberry-tagreader/CMakeLists.txt
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@ -1,7 +1,7 @@
cmake_minimum_required(VERSION 3.0)
set(MESSAGES tagreadermessages.proto)
set(SOURCES fmpsparser.cpp tagreader.cpp)
set(SOURCES tagreader.cpp)
protobuf_generate_cpp(PROTO_SOURCES PROTO_HEADERS ${MESSAGES})

132
ext/libstrawberry-tagreader/fmpsparser.cpp
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@ -1,132 +0,0 @@
/* This file is part of Strawberry.
Copyright 2010, David Sansome <me@davidsansome.com>
Strawberry 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 3 of the License, or
(at your option) any later version.
Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <functional>
#include <QList>
#include <QVariant>
#include <QString>
#include <QChar>
#include <QRegularExpression>
#include <QRegularExpressionMatch>
#include "fmpsparser.h"
using std::placeholders::_1;
using std::placeholders::_2;
FMPSParser::FMPSParser() :
// The float regex ends with (?:$|(?=::|;;)) to ensure it matches all the way
// up to the end of the value. Without it, it would match a string that
// starts with a number, like "123abc".
float_re_("\\s*([+-]?\\d+(?:\\.\\d+)?)\\s*(?:$|(?=::|;;))"),
// Matches any character except unescaped slashes, colons and semicolons.
string_re_("((?:[^\\\\;:]|(?:\\\\[\\\\:;]))+)(?:$|(?=::|;;))"),
// Used for replacing escaped characters.
escape_re_("\\\\([\\\\:;])") {}
// Parses a list of things (of type T) that are separated by two consecutive
// Separator characters. Each individual thing is parsed by the F function.
// For example, to parse this data:
// foo::bar::baz
// Use:
// QVariantList ret;
// ParseContainer<':'>(data, ParseValue, &ret);
// ret will then contain "foo", "bar", and "baz".
// Returns the number of characters that were consumed from data.
//
// You can parse lists of lists by using different separator characters:
// ParseContainer<';'>(data, ParseContainer<':'>, &ret);
template <char Separator, typename F, typename T>
static int ParseContainer(const QStringRef& data, F f, QList<T>* ret) {
ret->clear();
T value;
int pos = 0;
while (pos < data.length()) {
const int len = data.length() - pos;
int matched_len = f(QStringRef(data.string(), data.position() + pos, len), &value);
if (matched_len == -1 || matched_len > len)
break;
ret->append(value);
pos += matched_len;
// Expect two separators in a row
if (pos + 2 <= data.length() && data.at(pos) == Separator && data.at(pos+1) == Separator) {
pos += 2;
} else {
break;
}
}
return pos;
}
bool FMPSParser::Parse(const QString &data) {
result_ = Result();
// Only return success if we matched the whole string
return ParseListList(data, &result_) == data.length();
}
int FMPSParser::ParseValueRef(const QStringRef& data, QVariant* ret) const {
// Try to match a float
QRegularExpressionMatch re_match = float_re_.match(*data.string(), data.position());
if (re_match.capturedStart() == data.position()) {
*ret = re_match.captured(1).toDouble();
return re_match.capturedLength();
}
// Otherwise try to match a string
re_match = string_re_.match(*data.string(), data.position());
if (re_match.capturedStart() == data.position()) {
// Replace escape sequences with their actual characters
QString value = re_match.captured(1);
value.replace(escape_re_, "\\1");
*ret = value;
return re_match.capturedLength();
}
return -1;
}
// Parses an inner list - a list of values
int FMPSParser::ParseListRef(const QStringRef &data, QVariantList *ret) const {
return ParseContainer<':'>(data, std::bind(&FMPSParser::ParseValueRef, this, _1, _2), ret);
}
// Parses an outer list - a list of lists
int FMPSParser::ParseListListRef(const QStringRef &data, Result *ret) const {
return ParseContainer<';'>(data, std::bind(&FMPSParser::ParseListRef, this, _1, _2), ret);
}
// Convenience functions that take QStrings instead of QStringRefs. Use the QStringRef versions if possible, they're faster.
int FMPSParser::ParseValue(const QString &data, QVariant *ret) const {
return ParseValueRef(QStringRef(&data), ret);
}
int FMPSParser::ParseList(const QString &data, QVariantList *ret) const {
return ParseListRef(QStringRef(&data), ret);
}
int FMPSParser::ParseListList(const QString &data, Result *ret) const {
return ParseListListRef(QStringRef(&data), ret);
}

64
ext/libstrawberry-tagreader/fmpsparser.h
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@ -1,64 +0,0 @@
/* This file is part of Strawberry.
Copyright 2010, David Sansome <me@davidsansome.com>
Strawberry 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 3 of the License, or
(at your option) any later version.
Strawberry 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 Strawberry. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef FMPSPARSER_H
#define FMPSPARSER_H
#include "config.h"
#include <QList>
#include <QMetaType>
#include <QString>
#include <QRegularExpression>
class QVariant;
class FMPSParser {
public:
FMPSParser();
// A FMPS result is a list of lists of values (where a value is a string or
// a float).
typedef QList<QVariantList> Result;
// Parses a FMPS value and returns true on success.
bool Parse(const QString &data);
// Gets the result of the last successful Parse.
Result result() const { return result_; }
// Returns true if result() is empty.
bool is_empty() const { return result().isEmpty() || result()[0].isEmpty(); }
// Internal functions, public for unit tests
int ParseValue(const QString &data, QVariant *ret) const;
int ParseValueRef(const QStringRef &data, QVariant *ret) const;
int ParseList(const QString &data, QVariantList *ret) const;
int ParseListRef(const QStringRef &data, QVariantList *ret) const;
int ParseListList(const QString &data, Result *ret) const;
int ParseListListRef(const QStringRef &data, Result *ret) const;
private:
QRegularExpression float_re_;
QRegularExpression string_re_;
QRegularExpression escape_re_;
Result result_;
};
#endif // FMPSPARSER_H

38
ext/libstrawberry-tagreader/tagreader.cpp
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@ -90,8 +90,6 @@
#include "core/logging.h"
#include "core/messagehandler.h"
#include "fmpsparser.h"
#include "core/timeconstants.h"
class FileRefFactory {
@ -300,15 +298,6 @@ void TagReader::ReadFile(const QString &filename, pb::tagreader::SongMetadata *s
}
}
// Parse FMPS frames
for (uint i = 0; i < map["TXXX"].size(); ++i) {
const TagLib::ID3v2::UserTextIdentificationFrame *frame = dynamic_cast<const TagLib::ID3v2::UserTextIdentificationFrame*>(map["TXXX"][i]);
if (frame && frame->description().startsWith("FMPS_")) {
ParseFMPSFrame(TStringToQString(frame->description()), TStringToQString(frame->fieldList()[1]), song);
}
}
}
}
@ -523,33 +512,6 @@ void TagReader::ParseAPETag(const TagLib::APE::ItemListMap &map, const QTextCode
}
void TagReader::ParseFMPSFrame(const QString &name, const QString &value, pb::tagreader::SongMetadata *song) const {
qLog(Debug) << "Parsing FMPSFrame" << name << ", " << value;
FMPSParser parser;
if (!parser.Parse(value) || parser.is_empty()) return;
QVariant var;
if (name == "FMPS_PlayCount") {
var = parser.result()[0][0];
if (var.type() == QVariant::Double) {
song->set_playcount(var.toDouble());
}
}
else if (name == "FMPS_PlayCount_User") {
// Take a user playcount only if there's no playcount already set
if (song->playcount() == 0 && parser.result()[0].count() >= 2) {
var = parser.result()[0][1];
if (var.type() == QVariant::Double) {
song->set_playcount(var.toDouble());
}
}
}
}
void TagReader::SetVorbisComments(TagLib::Ogg::XiphComment *vorbis_comments, const pb::tagreader::SongMetadata &song) const {
vorbis_comments->addField("COMPOSER", StdStringToTaglibString(song.composer()), true);

1
ext/libstrawberry-tagreader/tagreader.h
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@ -66,7 +66,6 @@ class TagReader {
void ParseOggTag(const TagLib::Ogg::FieldListMap &map, const QTextCodec *codec, QString *disc, QString *compilation, pb::tagreader::SongMetadata *song) const;
void ParseAPETag(const TagLib::APE::ItemListMap &map, const QTextCodec *codec, QString *disc, QString *compilation, pb::tagreader::SongMetadata *song) const;
void ParseFMPSFrame(const QString &name, const QString &value, pb::tagreader::SongMetadata *song) const;
void SetVorbisComments(TagLib::Ogg::XiphComment *vorbis_comments, const pb::tagreader::SongMetadata &song) const;
void SaveAPETag(TagLib::APE::Tag *tag, const pb::tagreader::SongMetadata &song) const;