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-rw-r--r--src/playlist/plugins/EmbeddedCuePlaylistPlugin.cxx184
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diff --git a/src/playlist/plugins/EmbeddedCuePlaylistPlugin.cxx b/src/playlist/plugins/EmbeddedCuePlaylistPlugin.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.
+ */
+
+/** \file
+ *
+ * Playlist plugin that reads embedded cue sheets from the "CUESHEET"
+ * tag of a music file.
+ */
+
+#include "config.h"
+#include "EmbeddedCuePlaylistPlugin.hxx"
+#include "../PlaylistPlugin.hxx"
+#include "../SongEnumerator.hxx"
+#include "../cue/CueParser.hxx"
+#include "tag/TagHandler.hxx"
+#include "tag/TagId3.hxx"
+#include "tag/ApeTag.hxx"
+#include "DetachedSong.hxx"
+#include "TagFile.hxx"
+#include "fs/Traits.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "util/ASCII.hxx"
+
+#include <string.h>
+
+class EmbeddedCuePlaylist final : public SongEnumerator {
+public:
+ /**
+ * This is an override for the CUE's "FILE". An embedded CUE
+ * sheet must always point to the song file it is contained
+ * in.
+ */
+ std::string filename;
+
+ /**
+ * The value of the file's "CUESHEET" tag.
+ */
+ std::string cuesheet;
+
+ /**
+ * The offset of the next line within "cuesheet".
+ */
+ char *next;
+
+ CueParser *parser;
+
+public:
+ EmbeddedCuePlaylist()
+ :parser(nullptr) {
+ }
+
+ virtual ~EmbeddedCuePlaylist() {
+ delete parser;
+ }
+
+ virtual DetachedSong *NextSong() override;
+};
+
+static void
+embcue_tag_pair(const char *name, const char *value, void *ctx)
+{
+ EmbeddedCuePlaylist *playlist = (EmbeddedCuePlaylist *)ctx;
+
+ if (playlist->cuesheet.empty() &&
+ StringEqualsCaseASCII(name, "cuesheet"))
+ playlist->cuesheet = value;
+}
+
+static const struct tag_handler embcue_tag_handler = {
+ nullptr,
+ nullptr,
+ embcue_tag_pair,
+};
+
+static SongEnumerator *
+embcue_playlist_open_uri(const char *uri,
+ gcc_unused Mutex &mutex,
+ gcc_unused Cond &cond)
+{
+ if (!PathTraitsUTF8::IsAbsolute(uri))
+ /* only local files supported */
+ return nullptr;
+
+ const auto path_fs = AllocatedPath::FromUTF8(uri);
+ if (path_fs.IsNull())
+ return nullptr;
+
+ const auto playlist = new EmbeddedCuePlaylist();
+
+ tag_file_scan(path_fs, embcue_tag_handler, playlist);
+ if (playlist->cuesheet.empty()) {
+ tag_ape_scan2(path_fs, &embcue_tag_handler, playlist);
+ if (playlist->cuesheet.empty())
+ tag_id3_scan(path_fs, &embcue_tag_handler, playlist);
+ }
+
+ if (playlist->cuesheet.empty()) {
+ /* no "CUESHEET" tag found */
+ delete playlist;
+ return nullptr;
+ }
+
+ playlist->filename = PathTraitsUTF8::GetBase(uri);
+
+ playlist->next = &playlist->cuesheet[0];
+ playlist->parser = new CueParser();
+
+ return playlist;
+}
+
+DetachedSong *
+EmbeddedCuePlaylist::NextSong()
+{
+ DetachedSong *song = parser->Get();
+ if (song != nullptr)
+ return song;
+
+ while (*next != 0) {
+ const char *line = next;
+ char *eol = strpbrk(next, "\r\n");
+ if (eol != nullptr) {
+ /* null-terminate the line */
+ *eol = 0;
+ next = eol + 1;
+ } else
+ /* last line; put the "next" pointer to the
+ end of the buffer */
+ next += strlen(line);
+
+ parser->Feed(line);
+ song = parser->Get();
+ if (song != nullptr) {
+ song->SetURI(filename);
+ return song;
+ }
+ }
+
+ parser->Finish();
+ song = parser->Get();
+ if (song != nullptr)
+ song->SetURI(filename);
+ return song;
+}
+
+static const char *const embcue_playlist_suffixes[] = {
+ /* a few codecs that are known to be supported; there are
+ probably many more */
+ "flac",
+ "mp3", "mp2",
+ "mp4", "mp4a", "m4b",
+ "ape",
+ "wv",
+ "ogg", "oga",
+ nullptr
+};
+
+const struct playlist_plugin embcue_playlist_plugin = {
+ "cue",
+
+ nullptr,
+ nullptr,
+ embcue_playlist_open_uri,
+ nullptr,
+
+ embcue_playlist_suffixes,
+ nullptr,
+ nullptr,
+};