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562 lines
12 KiB
562 lines
12 KiB
/*************************************************************************** |
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* Copyright (C) 2008-2009 by Andrzej Rybczak * |
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* electricityispower@gmail.com * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the * |
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* Free Software Foundation, Inc., * |
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. * |
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***************************************************************************/ |
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#ifdef HAVE_CONFIG_H |
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#include <config.h> |
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#endif |
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#include <cstring> |
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#include <iomanip> |
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#include <sstream> |
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#include <stdexcept> |
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#include "charset.h" |
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#include "conv.h" |
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#include "error.h" |
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#include "song.h" |
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|
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namespace |
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{ |
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unsigned calc_hash(const char *p) |
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{ |
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unsigned hash = 5381; |
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while (*p) |
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hash = (hash << 5) + hash + *p++; |
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return hash; |
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} |
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} |
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MPD::Song::Song(mpd_song *s, bool copy_ptr) : itsSong(s), |
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itsFile(0), |
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itsTags(0), |
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itsSlash(std::string::npos), |
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itsHash(0), |
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copyPtr(copy_ptr), |
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isLocalised(0) |
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{ |
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if (itsSong) |
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SetHashAndSlash(); |
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} |
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MPD::Song::Song(const Song &s) : itsSong(s.copyPtr ? s.itsSong : mpd_song_dup(s.itsSong)), |
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itsFile(s.itsFile ? strdup(s.itsFile) : 0), |
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itsTags(s.itsTags ? new TagMap(*s.itsTags) : 0), |
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itsNewName(s.itsNewName), |
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itsSlash(s.itsSlash), |
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itsHash(s.itsHash), |
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copyPtr(s.copyPtr), |
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isLocalised(s.isLocalised) |
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{ |
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} |
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MPD::Song::~Song() |
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{ |
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if (itsSong) |
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mpd_song_free(itsSong); |
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delete [] itsFile; |
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delete itsTags; |
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} |
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std::string MPD::Song::GetLength(unsigned pos) const |
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{ |
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if (pos > 0) |
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return ""; |
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unsigned len = mpd_song_get_duration(itsSong); |
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return !len ? "-:--" : ShowTime(len); |
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} |
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void MPD::Song::Localize() |
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{ |
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# ifdef HAVE_ICONV_H |
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if (isLocalised) |
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return; |
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const char *tag, *conv_tag; |
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conv_tag = tag = mpd_song_get_uri(itsSong); |
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utf_to_locale(conv_tag, 0); |
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if (tag != conv_tag) // file has been converted |
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{ |
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itsFile = conv_tag; |
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SetHashAndSlash(); |
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} |
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for (unsigned t = MPD_TAG_ARTIST; t <= MPD_TAG_DISC; ++t) |
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{ |
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unsigned pos = 0; |
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for (; (tag = mpd_song_get_tag(itsSong, mpd_tag_type(t), pos)); ++pos) |
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{ |
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conv_tag = tag; |
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utf_to_locale(conv_tag, 0); |
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if (tag != conv_tag) // tag has been converted |
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{ |
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SetTag(mpd_tag_type(t), pos, conv_tag); |
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delete [] conv_tag; |
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} |
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} |
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} |
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isLocalised = 1; |
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# endif // HAVE_ICONV_H |
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} |
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void MPD::Song::Clear() |
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{ |
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if (itsSong) |
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mpd_song_free(itsSong); |
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itsSong = 0; |
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delete [] itsFile; |
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itsFile = 0; |
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delete itsTags; |
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itsTags = 0; |
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itsNewName.clear(); |
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itsSlash = std::string::npos; |
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itsHash = 0; |
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isLocalised = 0; |
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copyPtr = 0; |
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} |
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bool MPD::Song::Empty() const |
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{ |
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return !itsSong; |
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} |
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bool MPD::Song::isFromDB() const |
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{ |
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return (MyFilename()[0] != '/') || itsSlash == std::string::npos; |
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} |
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bool MPD::Song::isStream() const |
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{ |
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return !strncmp(MyFilename(), "http://", 7); |
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} |
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std::string MPD::Song::GetFile(unsigned pos) const |
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{ |
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return pos > 0 ? "" : MyFilename(); |
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} |
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std::string MPD::Song::GetName(unsigned pos) const |
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{ |
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if (pos > 0) |
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return ""; |
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std::string name = GetTag(MPD_TAG_NAME, 0); |
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if (!name.empty()) |
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return name; |
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else if (itsSlash != std::string::npos) |
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return MyFilename()+itsSlash+1; |
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else |
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return MyFilename(); |
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} |
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std::string MPD::Song::GetDirectory(unsigned pos) const |
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{ |
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if (pos > 0 || isStream()) |
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return ""; |
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else if (itsSlash == std::string::npos) |
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return "/"; |
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else |
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return std::string(MyFilename(), itsSlash); |
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} |
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std::string MPD::Song::GetArtist(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_ARTIST, pos); |
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} |
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std::string MPD::Song::GetTitle(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_TITLE, pos); |
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} |
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std::string MPD::Song::GetAlbum(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_ALBUM, pos); |
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} |
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std::string MPD::Song::GetTrack(unsigned pos) const |
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{ |
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std::string track = GetTag(MPD_TAG_TRACK, pos); |
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return track.length() == 1 && track[0] != '0' ? "0"+track : track; |
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} |
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std::string MPD::Song::GetTrackNumber(unsigned pos) const |
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{ |
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std::string track = GetTag(MPD_TAG_TRACK, pos); |
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size_t slash = track.find('/'); |
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if (slash != std::string::npos) |
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track.resize(slash); |
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return track.length() == 1 && track[0] != '0' ? "0"+track : track; |
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} |
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std::string MPD::Song::GetDate(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_DATE, pos); |
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} |
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std::string MPD::Song::GetGenre(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_GENRE, pos); |
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} |
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std::string MPD::Song::GetComposer(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_COMPOSER, pos); |
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} |
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std::string MPD::Song::GetPerformer(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_PERFORMER, pos); |
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} |
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std::string MPD::Song::GetDisc(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_DISC, pos); |
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} |
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std::string MPD::Song::GetComment(unsigned pos) const |
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{ |
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return GetTag(MPD_TAG_COMMENT, pos); |
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} |
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std::string MPD::Song::GetTags(GetFunction f) const |
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{ |
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unsigned pos = 0; |
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std::string result; |
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for (std::string tag; !(tag = (this->*f)(pos)).empty(); ++pos) |
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{ |
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if (!result.empty()) |
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result += ", "; |
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result += tag; |
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} |
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return result; |
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} |
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void MPD::Song::SetArtist(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_ARTIST, pos, str); |
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} |
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void MPD::Song::SetTitle(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_TITLE, pos, str); |
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} |
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void MPD::Song::SetAlbum(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_ALBUM, pos, str); |
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} |
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void MPD::Song::SetTrack(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_TRACK, pos, str); |
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} |
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void MPD::Song::SetTrack(unsigned track, unsigned pos) |
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{ |
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SetTag(MPD_TAG_TRACK, pos, IntoStr(track)); |
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} |
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void MPD::Song::SetDate(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_DATE, pos, str); |
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} |
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void MPD::Song::SetDate(unsigned year, unsigned pos) |
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{ |
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SetTag(MPD_TAG_DATE, pos, IntoStr(year)); |
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} |
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void MPD::Song::SetGenre(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_GENRE, pos, str); |
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} |
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void MPD::Song::SetComposer(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_COMPOSER, pos, str); |
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} |
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void MPD::Song::SetPerformer(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_PERFORMER, pos, str); |
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} |
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void MPD::Song::SetDisc(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_DISC, pos, str); |
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} |
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void MPD::Song::SetComment(const std::string &str, unsigned pos) |
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{ |
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SetTag(MPD_TAG_COMMENT, pos, str); |
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} |
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void MPD::Song::SetPosition(unsigned pos) |
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{ |
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mpd_song_set_pos(itsSong, pos); |
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} |
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void MPD::Song::SetTags(SetFunction f, const std::string &value) |
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{ |
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unsigned pos = 0; |
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// tag editor can save multiple instances of performer and composer |
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// tag, so we need to split them and allow it to read them separately. |
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if (f == &Song::SetComposer || f == &Song::SetPerformer) |
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{ |
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for (size_t i = 0; i != std::string::npos; i = value.find(",", i)) |
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{ |
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if (i) |
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++i; |
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while (value[i] == ' ') |
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++i; |
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size_t j = value.find(",", i); |
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(this->*f)(value.substr(i, j-i), pos++); |
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} |
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} |
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else |
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(this->*f)(value, pos++); |
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// there should be empty tag at the end since if we are |
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// reading them, original tag from mpd_song at the position |
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// after the last one locally set can be non-empty and in this |
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// case GetTags() would read it, which is undesirable. |
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(this->*f)("", pos); |
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} |
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std::string MPD::Song::ParseFormat(std::string::const_iterator &it, const char *escape_chars) const |
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{ |
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std::string result; |
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bool has_some_tags = 0; |
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MPD::Song::GetFunction get = 0; |
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while (*++it != '}') |
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{ |
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while (*it == '{') |
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{ |
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std::string tags = ParseFormat(it, escape_chars); |
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if (!tags.empty()) |
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{ |
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has_some_tags = 1; |
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result += tags; |
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} |
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} |
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if (*it == '}') |
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break; |
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if (*it == '%') |
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{ |
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switch (*++it) |
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{ |
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case 'l': |
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get = &MPD::Song::GetLength; |
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break; |
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case 'D': |
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get = &MPD::Song::GetDirectory; |
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break; |
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case 'f': |
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get = &MPD::Song::GetName; |
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break; |
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case 'a': |
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get = &MPD::Song::GetArtist; |
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break; |
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case 'b': |
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get = &MPD::Song::GetAlbum; |
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break; |
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case 'y': |
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get = &MPD::Song::GetDate; |
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break; |
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case 'n': |
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get = &MPD::Song::GetTrackNumber; |
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break; |
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case 'N': |
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get = &MPD::Song::GetTrack; |
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break; |
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case 'g': |
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get = &MPD::Song::GetGenre; |
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break; |
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case 'c': |
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get = &MPD::Song::GetComposer; |
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break; |
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case 'p': |
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get = &MPD::Song::GetPerformer; |
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break; |
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case 'd': |
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get = &MPD::Song::GetDisc; |
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break; |
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case 'C': |
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get = &MPD::Song::GetComment; |
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break; |
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case 't': |
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get = &MPD::Song::GetTitle; |
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break; |
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case '%': |
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result += *it; // no break here |
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default: |
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get = 0; |
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break; |
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} |
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if (get) |
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{ |
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std::string tag = GetTags(get); |
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if (escape_chars) // prepend format escape character to all given chars to escape |
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for (const char *ch = escape_chars; *ch; ++ch) |
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for (size_t i = tag.find(*ch); i != std::string::npos; i = tag.find(*ch, i += 2)) |
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tag.replace(i, 1, std::string(1, FormatEscapeCharacter) + ch); |
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if (!tag.empty() && (get != &MPD::Song::GetLength || GetTotalLength())) |
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{ |
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has_some_tags = 1; |
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result += tag; |
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} |
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else |
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break; |
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} |
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} |
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else |
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result += *it; |
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} |
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int brace_counter = 0; |
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if (*it != '}' || !has_some_tags) |
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{ |
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for (; *it != '}' || brace_counter; ++it) |
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{ |
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if (*it == '{') |
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++brace_counter; |
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else if (*it == '}') |
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--brace_counter; |
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} |
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if (*++it == '|') |
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return ParseFormat(++it, escape_chars); |
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else |
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return ""; |
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} |
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else |
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{ |
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if (*(it+1) == '|') |
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{ |
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for (; *it != '}' || *(it+1) == '|' || brace_counter; ++it) |
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{ |
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if (*it == '{') |
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++brace_counter; |
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else if (*it == '}') |
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--brace_counter; |
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} |
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} |
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++it; |
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return result; |
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} |
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} |
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std::string MPD::Song::toString(const std::string &format, const char *escape_chars) const |
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{ |
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std::string::const_iterator it = format.begin(); |
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return ParseFormat(it, escape_chars); |
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} |
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MPD::Song &MPD::Song::operator=(const MPD::Song &s) |
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{ |
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if (this == &s) |
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return *this; |
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if (itsSong) |
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mpd_song_free(itsSong); |
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delete [] itsFile; |
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delete itsTags; |
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itsSong = s.copyPtr ? s.itsSong : (s.itsSong ? mpd_song_dup(s.itsSong) : 0); |
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itsFile = s.itsFile ? strdup(s.itsFile) : 0; |
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itsTags = s.itsTags ? new TagMap(*s.itsTags) : 0; |
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itsNewName = s.itsNewName; |
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itsSlash = s.itsSlash; |
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itsHash = s.itsHash; |
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copyPtr = s.copyPtr; |
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isLocalised = s.isLocalised; |
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return *this; |
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} |
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std::string MPD::Song::ShowTime(int length) |
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{ |
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std::ostringstream ss; |
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int hours = length/3600; |
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length -= hours*3600; |
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int minutes = length/60; |
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length -= minutes*60; |
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int seconds = length; |
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if (hours > 0) |
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{ |
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ss << hours << ":" |
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<< std::setw(2) << std::setfill('0') << minutes << ":" |
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<< std::setw(2) << std::setfill('0') << seconds; |
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} |
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else |
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{ |
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ss << minutes << ":" |
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<< std::setw(2) << std::setfill('0') << seconds; |
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} |
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return ss.str(); |
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} |
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void MPD::Song::ValidateFormat(const std::string &type, const std::string &s) |
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{ |
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int braces = 0; |
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for (std::string::const_iterator it = s.begin(); it != s.end(); ++it) |
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{ |
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if (*it == '{') |
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++braces; |
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else if (*it == '}') |
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--braces; |
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} |
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if (braces) |
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FatalError(type + ": number of opening and closing braces does not equal!"); |
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} |
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void MPD::Song::SetHashAndSlash() |
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{ |
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const char *filename = MyFilename(); |
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if (!isStream()) |
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{ |
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const char *tmp = strrchr(filename, '/'); |
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itsSlash = tmp ? tmp-filename : std::string::npos; |
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} |
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if (!itsFile) |
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itsHash = calc_hash(filename); |
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} |
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const char *MPD::Song::MyFilename() const |
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{ |
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return itsFile ? itsFile : mpd_song_get_uri(itsSong); |
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} |
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void MPD::Song::SetTag(mpd_tag_type type, unsigned pos, const std::string &value) |
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{ |
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if (!itsTags) |
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itsTags = new TagMap; |
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(*itsTags)[std::make_pair(type, pos)] = value; |
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} |
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std::string MPD::Song::GetTag(mpd_tag_type type, unsigned pos) const |
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{ |
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if (itsTags) |
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{ |
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TagMap::const_iterator it = itsTags->find(std::make_pair(type, pos)); |
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if (it != itsTags->end()) |
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return it->second; |
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} |
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const char *tag = mpd_song_get_tag(itsSong, type, pos); |
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return tag ? tag : ""; |
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} |
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