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.

1 files changed, 117 insertions, 0 deletions

diff --git a/test/dump_playlist.c b/test/dump_playlist.c
new file mode 100644
index 00000000..3134d95b
--- /dev/null
+++ b/test/dump_playlist.c
@@ -0,0 +1,117 @@
+/*
+ * 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 "input_stream.h"
+#include "tag_pool.h"
+#include "tag_save.h"
+#include "conf.h"
+#include "song.h"
+#include "playlist_list.h"
+#include "playlist_plugin.h"
+
+#include <glib.h>
+
+#include <unistd.h>
+
+static void
+my_log_func(const gchar *log_domain, G_GNUC_UNUSED GLogLevelFlags log_level,
+	    const gchar *message, G_GNUC_UNUSED gpointer user_data)
+{
+	if (log_domain != NULL)
+		g_printerr("%s: %s\n", log_domain, message);
+	else
+		g_printerr("%s\n", message);
+}
+
+int main(int argc, char **argv)
+{
+	const char *uri;
+	struct input_stream is;
+	bool success;
+	struct playlist_provider *playlist;
+	struct song *song;
+
+	if (argc != 2) {
+		g_printerr("Usage: dump_playlist URI\n");
+		return 1;
+	}
+
+	uri = argv[1];
+
+	/* initialize GLib */
+
+	g_thread_init(NULL);
+	g_log_set_default_handler(my_log_func, NULL);
+
+	/* initialize MPD */
+
+	tag_pool_init();
+	config_global_init();
+	input_stream_global_init();
+	playlist_list_global_init();
+
+	/* open the stream and wait until it becomes ready */
+
+	success = input_stream_open(&is, uri);
+	if (!success) {
+		g_printerr("input_stream_open() failed\n");
+		return 2;
+	}
+
+	while (!is.ready) {
+		int ret = input_stream_buffer(&is);
+		if (ret < 0)
+			/* error */
+			return 2;
+
+		if (ret == 0)
+			/* nothing was buffered - wait */
+			g_usleep(10000);
+	}
+
+	/* open the playlist */
+
+	playlist = playlist_list_open_stream(&is, uri);
+	if (playlist == NULL) {
+		input_stream_close(&is);
+		g_printerr("Failed to open playlist\n");
+		return 2;
+	}
+
+	/* dump the playlist */
+
+	while ((song = playlist_plugin_read(playlist)) != NULL) {
+		g_print("%s\n", song->url);
+		if (song->tag != NULL)
+			tag_save(stdout, song->tag);
+
+		song_free(song);
+	}
+
+	/* deinitialize everything */
+
+	playlist_plugin_close(playlist);
+	input_stream_close(&is);
+	playlist_list_global_finish();
+	input_stream_global_finish();
+	config_global_finish();
+	tag_pool_deinit();
+
+	return 0;
+}