playlist_plugin: new plugin API for playlist parsers

Based on this API, we will add parsers for EXTM3U, PLS, ASX, last.fm
radio and others.

There is no integration into the MPD core yet.  Right now, we have a
command line test program.  This is work in progress.

2 files changed, 114 insertions, 0 deletions

diff --git a/src/playlist/m3u_playlist_plugin.c b/src/playlist/m3u_playlist_plugin.c
new file mode 100644
index 000000000..1eb2680a9
--- /dev/null
+++ b/src/playlist/m3u_playlist_plugin.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2003-2009 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 "playlist/m3u_playlist_plugin.h"
+#include "playlist_plugin.h"
+#include "text_input_stream.h"
+#include "uri.h"
+#include "song.h"
+
+#include <glib.h>
+
+struct m3u_playlist {
+	struct playlist_provider base;
+
+	struct text_input_stream *tis;
+};
+
+static struct playlist_provider *
+m3u_open_stream(struct input_stream *is)
+{
+	struct m3u_playlist *playlist = g_new(struct m3u_playlist, 1);
+
+	playlist_provider_init(&playlist->base, &m3u_playlist_plugin);
+	playlist->tis = text_input_stream_new(is);
+
+	return &playlist->base;
+}
+
+static void
+m3u_close(struct playlist_provider *_playlist)
+{
+	struct m3u_playlist *playlist = (struct m3u_playlist *)_playlist;
+
+	text_input_stream_free(playlist->tis);
+	g_free(playlist);
+}
+
+static struct song *
+m3u_read(struct playlist_provider *_playlist)
+{
+	struct m3u_playlist *playlist = (struct m3u_playlist *)_playlist;
+	const char *line;
+
+	do {
+		line = text_input_stream_read(playlist->tis);
+		if (line == NULL)
+			return NULL;
+
+		while (*line != 0 && g_ascii_isspace(*line))
+			++line;
+	} while (line[0] == '#' || !uri_has_scheme(line));
+
+	return song_remote_new(line);
+}
+
+static const char *const m3u_suffixes[] = {
+	"m3u",
+	NULL
+};
+
+static const char *const m3u_mime_types[] = {
+	"audio/x-mpegurl",
+	NULL
+};
+
+const struct playlist_plugin m3u_playlist_plugin = {
+	.open_stream = m3u_open_stream,
+	.close = m3u_close,
+	.read = m3u_read,
+
+	.suffixes = m3u_suffixes,
+	.mime_types = m3u_mime_types,
+};
diff --git a/src/playlist/m3u_playlist_plugin.h b/src/playlist/m3u_playlist_plugin.h
new file mode 100644
index 000000000..3cb4b8874
--- /dev/null
+++ b/src/playlist/m3u_playlist_plugin.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2003-2009 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.
+ */
+
+#ifndef MPD_PLAYLIST_M3U_PLAYLIST_PLUGIN_H
+#define MPD_PLAYLIST_M3U_PLAYLIST_PLUGIN_H
+
+extern const struct playlist_plugin m3u_playlist_plugin;
+
+#endif