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-rw-r--r--src/playlist/plugins/XspfPlaylistPlugin.cxx234
1 files changed, 234 insertions, 0 deletions
diff --git a/src/playlist/plugins/XspfPlaylistPlugin.cxx b/src/playlist/plugins/XspfPlaylistPlugin.cxx
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+++ b/src/playlist/plugins/XspfPlaylistPlugin.cxx
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+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "XspfPlaylistPlugin.hxx"
+#include "../PlaylistPlugin.hxx"
+#include "../MemorySongEnumerator.hxx"
+#include "DetachedSong.hxx"
+#include "input/InputStream.hxx"
+#include "tag/TagBuilder.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+#include "lib/expat/ExpatParser.hxx"
+#include "Log.hxx"
+
+#include <string.h>
+
+static constexpr Domain xspf_domain("xspf");
+
+/**
+ * This is the state object for the GLib XML parser.
+ */
+struct XspfParser {
+ /**
+ * The list of songs (in reverse order because that's faster
+ * while adding).
+ */
+ std::forward_list<DetachedSong> songs;
+
+ /**
+ * The current position in the XML file.
+ */
+ enum {
+ ROOT, PLAYLIST, TRACKLIST, TRACK,
+ LOCATION,
+ } state;
+
+ /**
+ * The current tag within the "track" element. This is only
+ * valid if state==TRACK. TAG_NUM_OF_ITEM_TYPES means there
+ * is no (known) tag.
+ */
+ TagType tag_type;
+
+ /**
+ * The current song URI. It is set by the "location" element.
+ */
+ std::string location;
+
+ TagBuilder tag_builder;
+
+ XspfParser()
+ :state(ROOT) {}
+};
+
+static void XMLCALL
+xspf_start_element(void *user_data, const XML_Char *element_name,
+ gcc_unused const XML_Char **atts)
+{
+ XspfParser *parser = (XspfParser *)user_data;
+
+ switch (parser->state) {
+ case XspfParser::ROOT:
+ if (strcmp(element_name, "playlist") == 0)
+ parser->state = XspfParser::PLAYLIST;
+
+ break;
+
+ case XspfParser::PLAYLIST:
+ if (strcmp(element_name, "trackList") == 0)
+ parser->state = XspfParser::TRACKLIST;
+
+ break;
+
+ case XspfParser::TRACKLIST:
+ if (strcmp(element_name, "track") == 0) {
+ parser->state = XspfParser::TRACK;
+ parser->location.clear();
+ parser->tag_type = TAG_NUM_OF_ITEM_TYPES;
+ }
+
+ break;
+
+ case XspfParser::TRACK:
+ if (strcmp(element_name, "location") == 0)
+ parser->state = XspfParser::LOCATION;
+ else if (strcmp(element_name, "title") == 0)
+ parser->tag_type = TAG_TITLE;
+ else if (strcmp(element_name, "creator") == 0)
+ /* TAG_COMPOSER would be more correct
+ according to the XSPF spec */
+ parser->tag_type = TAG_ARTIST;
+ else if (strcmp(element_name, "annotation") == 0)
+ parser->tag_type = TAG_COMMENT;
+ else if (strcmp(element_name, "album") == 0)
+ parser->tag_type = TAG_ALBUM;
+ else if (strcmp(element_name, "trackNum") == 0)
+ parser->tag_type = TAG_TRACK;
+
+ break;
+
+ case XspfParser::LOCATION:
+ break;
+ }
+}
+
+static void XMLCALL
+xspf_end_element(void *user_data, const XML_Char *element_name)
+{
+ XspfParser *parser = (XspfParser *)user_data;
+
+ switch (parser->state) {
+ case XspfParser::ROOT:
+ break;
+
+ case XspfParser::PLAYLIST:
+ if (strcmp(element_name, "playlist") == 0)
+ parser->state = XspfParser::ROOT;
+
+ break;
+
+ case XspfParser::TRACKLIST:
+ if (strcmp(element_name, "tracklist") == 0)
+ parser->state = XspfParser::PLAYLIST;
+
+ break;
+
+ case XspfParser::TRACK:
+ if (strcmp(element_name, "track") == 0) {
+ if (!parser->location.empty())
+ parser->songs.emplace_front(std::move(parser->location),
+ parser->tag_builder.Commit());
+
+ parser->state = XspfParser::TRACKLIST;
+ } else
+ parser->tag_type = TAG_NUM_OF_ITEM_TYPES;
+
+ break;
+
+ case XspfParser::LOCATION:
+ parser->state = XspfParser::TRACK;
+ break;
+ }
+}
+
+static void XMLCALL
+xspf_char_data(void *user_data, const XML_Char *s, int len)
+{
+ XspfParser *parser = (XspfParser *)user_data;
+
+ switch (parser->state) {
+ case XspfParser::ROOT:
+ case XspfParser::PLAYLIST:
+ case XspfParser::TRACKLIST:
+ break;
+
+ case XspfParser::TRACK:
+ if (!parser->location.empty() &&
+ parser->tag_type != TAG_NUM_OF_ITEM_TYPES)
+ parser->tag_builder.AddItem(parser->tag_type, s, len);
+
+ break;
+
+ case XspfParser::LOCATION:
+ parser->location.assign(s, len);
+
+ break;
+ }
+}
+
+/*
+ * The playlist object
+ *
+ */
+
+static SongEnumerator *
+xspf_open_stream(InputStream &is)
+{
+ XspfParser parser;
+
+ {
+ ExpatParser expat(&parser);
+ expat.SetElementHandler(xspf_start_element, xspf_end_element);
+ expat.SetCharacterDataHandler(xspf_char_data);
+
+ Error error;
+ if (!expat.Parse(is, error)) {
+ LogError(error);
+ return nullptr;
+ }
+ }
+
+ parser.songs.reverse();
+ return new MemorySongEnumerator(std::move(parser.songs));
+}
+
+static const char *const xspf_suffixes[] = {
+ "xspf",
+ nullptr
+};
+
+static const char *const xspf_mime_types[] = {
+ "application/xspf+xml",
+ nullptr
+};
+
+const struct playlist_plugin xspf_playlist_plugin = {
+ "xspf",
+
+ nullptr,
+ nullptr,
+ nullptr,
+ xspf_open_stream,
+
+ nullptr,
+ xspf_suffixes,
+ xspf_mime_types,
+};