playlist: added XSPF plugin
This commit is contained in:
Max Kellermann
parent
898d885ae2
commit
8391ac4cc8
@ -139,6 +139,7 @@ mpd_headers = \
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src/playlist_plugin.h \
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src/playlist_list.h \
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src/playlist/m3u_playlist_plugin.h \
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src/playlist/xspf_playlist_plugin.h \
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src/poison.h \
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src/riff.h \
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src/aiff.h \
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@ -650,6 +651,7 @@ endif
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PLAYLIST_SRC = \
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src/playlist/m3u_playlist_plugin.c \
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src/playlist/xspf_playlist_plugin.c \
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src/playlist_list.c
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331
src/playlist/xspf_playlist_plugin.c
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331
src/playlist/xspf_playlist_plugin.c
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@ -0,0 +1,331 @@
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/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "playlist/xspf_playlist_plugin.h"
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#include "playlist_plugin.h"
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#include "input_stream.h"
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#include "uri.h"
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#include "song.h"
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#include "tag.h"
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#include <glib.h>
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#include <assert.h>
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#include <string.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "xspf"
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/**
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* This is the state object for the GLib XML parser.
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*/
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struct xspf_parser {
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/**
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* The list of songs (in reverse order because that's faster
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* while adding).
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*/
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GSList *songs;
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/**
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* The current position in the XML file.
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*/
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enum {
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ROOT, PLAYLIST, TRACKLIST, TRACK,
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LOCATION,
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} state;
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/**
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* The current tag within the "track" element. This is only
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* valid if state==TRACK. TAG_NUM_OF_ITEM_TYPES means there
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* is no (known) tag.
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*/
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enum tag_type tag;
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/**
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* The current song. It is allocated after the "location"
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* element.
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*/
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struct song *song;
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};
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static void
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xspf_start_element(G_GNUC_UNUSED GMarkupParseContext *context,
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const gchar *element_name,
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G_GNUC_UNUSED const gchar **attribute_names,
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G_GNUC_UNUSED const gchar **attribute_values,
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gpointer user_data, G_GNUC_UNUSED GError **error)
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{
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struct xspf_parser *parser = user_data;
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switch (parser->state) {
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case ROOT:
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if (strcmp(element_name, "playlist") == 0)
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parser->state = PLAYLIST;
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break;
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case PLAYLIST:
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if (strcmp(element_name, "trackList") == 0)
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parser->state = TRACKLIST;
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break;
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case TRACKLIST:
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if (strcmp(element_name, "track") == 0) {
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parser->state = TRACK;
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parser->song = NULL;
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parser->tag = TAG_NUM_OF_ITEM_TYPES;
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}
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break;
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case TRACK:
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if (strcmp(element_name, "location") == 0)
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parser->state = LOCATION;
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else if (strcmp(element_name, "title") == 0)
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parser->tag = TAG_TITLE;
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else if (strcmp(element_name, "creator") == 0)
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/* TAG_COMPOSER would be more correct
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according to the XSPF spec */
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parser->tag = TAG_ARTIST;
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else if (strcmp(element_name, "annotation") == 0)
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parser->tag = TAG_COMMENT;
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else if (strcmp(element_name, "album") == 0)
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parser->tag = TAG_ALBUM;
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else if (strcmp(element_name, "trackNum") == 0)
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parser->tag = TAG_TRACK;
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break;
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case LOCATION:
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break;
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}
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}
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static void
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xspf_end_element(G_GNUC_UNUSED GMarkupParseContext *context,
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const gchar *element_name,
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gpointer user_data, G_GNUC_UNUSED GError **error)
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{
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struct xspf_parser *parser = user_data;
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switch (parser->state) {
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case ROOT:
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break;
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case PLAYLIST:
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if (strcmp(element_name, "playlist") == 0)
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parser->state = ROOT;
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break;
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case TRACKLIST:
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if (strcmp(element_name, "tracklist") == 0)
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parser->state = PLAYLIST;
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break;
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case TRACK:
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if (strcmp(element_name, "track") == 0) {
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if (parser->song != NULL)
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parser->songs = g_slist_prepend(parser->songs,
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parser->song);
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parser->state = TRACKLIST;
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} else
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parser->tag = TAG_NUM_OF_ITEM_TYPES;
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break;
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case LOCATION:
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parser->state = TRACK;
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break;
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}
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}
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static void
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xspf_text(G_GNUC_UNUSED GMarkupParseContext *context,
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const gchar *text, gsize text_len,
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gpointer user_data, G_GNUC_UNUSED GError **error)
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{
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struct xspf_parser *parser = user_data;
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switch (parser->state) {
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case ROOT:
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case PLAYLIST:
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case TRACKLIST:
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case TRACK:
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if (parser->song != NULL &&
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parser->tag != TAG_NUM_OF_ITEM_TYPES) {
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if (parser->song->tag == NULL)
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parser->song->tag = tag_new();
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tag_add_item_n(parser->song->tag, parser->tag,
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text, text_len);
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}
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break;
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case LOCATION:
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if (parser->song == NULL) {
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char *uri = g_strndup(text, text_len);
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parser->song = song_remote_new(uri);
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g_free(uri);
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}
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break;
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}
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}
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static const GMarkupParser xspf_parser = {
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.start_element = xspf_start_element,
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.end_element = xspf_end_element,
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.text = xspf_text,
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};
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static void
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song_free_callback(gpointer data, G_GNUC_UNUSED gpointer user_data)
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{
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struct song *song = data;
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song_free(song);
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}
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static void
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xspf_parser_destroy(gpointer data)
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{
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struct xspf_parser *parser = data;
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if (parser->state >= TRACK && parser->song != NULL)
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song_free(parser->song);
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g_slist_foreach(parser->songs, song_free_callback, NULL);
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g_slist_free(parser->songs);
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}
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/*
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* The playlist object
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*
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*/
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struct xspf_playlist {
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struct playlist_provider base;
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GSList *songs;
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};
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static struct playlist_provider *
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xspf_open_stream(struct input_stream *is)
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{
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struct xspf_parser parser = {
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.songs = NULL,
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.state = ROOT,
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};
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struct xspf_playlist *playlist;
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GMarkupParseContext *context;
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char buffer[1024];
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size_t nbytes;
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bool success;
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GError *error = NULL;
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/* parse the XSPF XML file */
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context = g_markup_parse_context_new(&xspf_parser,
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G_MARKUP_TREAT_CDATA_AS_TEXT,
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&parser, xspf_parser_destroy);
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while (true) {
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nbytes = input_stream_read(is, buffer, sizeof(buffer));
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if (nbytes == 0)
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break;
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success = g_markup_parse_context_parse(context, buffer, nbytes,
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&error);
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if (!success) {
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g_warning("XML parser failed: %s", error->message);
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g_error_free(error);
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g_markup_parse_context_free(context);
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return NULL;
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}
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}
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success = g_markup_parse_context_end_parse(context, &error);
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if (!success) {
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g_warning("XML parser failed: %s", error->message);
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g_error_free(error);
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g_markup_parse_context_free(context);
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return NULL;
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}
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/* create a #xspf_playlist object from the parsed song list */
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playlist = g_new(struct xspf_playlist, 1);
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playlist_provider_init(&playlist->base, &xspf_playlist_plugin);
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playlist->songs = g_slist_reverse(parser.songs);
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parser.songs = NULL;
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g_markup_parse_context_free(context);
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return &playlist->base;
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}
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static void
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xspf_close(struct playlist_provider *_playlist)
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{
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struct xspf_playlist *playlist = (struct xspf_playlist *)_playlist;
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g_slist_foreach(playlist->songs, song_free_callback, NULL);
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g_slist_free(playlist->songs);
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g_free(playlist);
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}
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static struct song *
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xspf_read(struct playlist_provider *_playlist)
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{
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struct xspf_playlist *playlist = (struct xspf_playlist *)_playlist;
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struct song *song;
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if (playlist->songs == NULL)
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return NULL;
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song = playlist->songs->data;
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playlist->songs = g_slist_remove(playlist->songs, song);
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return song;
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}
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static const char *const xspf_suffixes[] = {
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"xspf",
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NULL
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};
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static const char *const xspf_mime_types[] = {
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"application/xspf+xml",
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NULL
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};
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const struct playlist_plugin xspf_playlist_plugin = {
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.name = "xspf",
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.open_stream = xspf_open_stream,
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.close = xspf_close,
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.read = xspf_read,
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.suffixes = xspf_suffixes,
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.mime_types = xspf_mime_types,
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};
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25
src/playlist/xspf_playlist_plugin.h
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25
src/playlist/xspf_playlist_plugin.h
Normal file
@ -0,0 +1,25 @@
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/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_PLAYLIST_XSPF_PLAYLIST_PLUGIN_H
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#define MPD_PLAYLIST_XSPF_PLAYLIST_PLUGIN_H
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extern const struct playlist_plugin xspf_playlist_plugin;
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#endif
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@ -20,6 +20,7 @@
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#include "playlist_list.h"
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#include "playlist_plugin.h"
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#include "playlist/m3u_playlist_plugin.h"
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#include "playlist/xspf_playlist_plugin.h"
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#include "input_stream.h"
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#include "uri.h"
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#include "utils.h"
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@ -32,6 +33,7 @@
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static const struct playlist_plugin *const playlist_plugins[] = {
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&m3u_playlist_plugin,
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&xspf_playlist_plugin,
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NULL
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};
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