X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Flyrics.c;h=43800eb48fb6d128dd65623f4084ee82a5d28899;hb=607bf2d55826f861d12b774884cb201bc683051c;hp=f26de837286f59e5fdc8f79cbfc663a8acbac1df;hpb=2ef2f5cd06ceaf086fe5410badd811b8feb980c0;p=ncmpc.git diff --git a/src/lyrics.c b/src/lyrics.c index f26de83..43800eb 100644 --- a/src/lyrics.c +++ b/src/lyrics.c @@ -1,292 +1,48 @@ -/* ncmpc - * Copyright (C) 2008 Max Kellermann - * This project's homepage is: http://www.musicpd.org - * +/* ncmpc (Ncurses MPD Client) + * (c) 2004-2009 The Music Player Daemon Project + * Project homepage: http://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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ + + * 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 "lyrics.h" -#include "../config.h" +#include "config.h" #include -#include -#include -#include -#include -#include -#include - -static GPtrArray *plugins; - -struct lyrics_loader { - char *artist, *title; - - lyrics_callback_t callback; - void *callback_data; - guint next_plugin; - - pid_t pid; - int fd; - GIOChannel *channel; - guint event_id; - - GString *data; -}; - -static int lyrics_register_plugin(const char *path0) -{ - int ret; - struct stat st; - char *path; - - ret = stat(path0, &st); - if (ret < 0) - return -1; - - path = g_strdup(path0); - g_ptr_array_add(plugins, path); - return 0; -} +static struct plugin_list plugins; void lyrics_init(void) { - GDir *dir; - - plugins = g_ptr_array_new(); - - dir = g_dir_open(LYRICS_PLUGIN_DIR, 0, NULL); - if (dir != NULL) { - const char *name; - char path[sizeof(LYRICS_PLUGIN_DIR) + 128]; - - memcpy(path, LYRICS_PLUGIN_DIR, sizeof(LYRICS_PLUGIN_DIR) - 1); - path[sizeof(LYRICS_PLUGIN_DIR) - 1] = G_DIR_SEPARATOR; - - while ((name = g_dir_read_name(dir)) != NULL) { - g_strlcpy(path + sizeof(LYRICS_PLUGIN_DIR), name, - sizeof(path) - sizeof(LYRICS_PLUGIN_DIR)); - lyrics_register_plugin(path); - } - - g_dir_close(dir); - } + plugin_list_init(&plugins); + plugin_list_load_directory(&plugins, LYRICS_PLUGIN_DIR); } void lyrics_deinit(void) { - guint i; - - for (i = 0; i < plugins->len; ++i) - free(g_ptr_array_index(plugins, i)); - g_ptr_array_free(plugins, TRUE); -} - -static void -lyrics_next_plugin(struct lyrics_loader *loader); - -static void -lyrics_eof(struct lyrics_loader *loader) -{ - int ret, status; - - g_io_channel_unref(loader->channel); - close(loader->fd); - loader->fd = -1; - - ret = waitpid(loader->pid, &status, 0); - loader->pid = -1; - - if (ret < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { - g_string_free(loader->data, TRUE); - loader->data = NULL; - - lyrics_next_plugin(loader); - } else { - loader->callback(loader->data, loader->callback_data); - } -} - -static gboolean -lyrics_data(G_GNUC_UNUSED GIOChannel *source, - G_GNUC_UNUSED GIOCondition condition, gpointer data) -{ - struct lyrics_loader *loader = data; - char buffer[256]; - ssize_t nbytes; - - assert(loader != NULL); - assert(loader->fd >= 0); - assert(loader->pid > 0); - assert(source == loader->channel); - - if ((condition & G_IO_IN) == 0) { - lyrics_eof(loader); - return FALSE; - } - - nbytes = condition & G_IO_IN - ? read(loader->fd, buffer, sizeof(buffer)) - : 0; - if (nbytes <= 0) { - lyrics_eof(loader); - return FALSE; - } - - g_string_append_len(loader->data, buffer, nbytes); - return TRUE; -} - -/** - * This is a timer callback which calls the lyrics callback "some - * timer later". This solves the problem that lyrics_load() may fail - * immediately, leaving its return value in an undefined state. - * Instead, install a timer which calls the lyrics callback in the - * moment after. - */ -static gboolean -lyrics_delayed_fail(gpointer data) -{ - struct lyrics_loader *loader = data; - - assert(loader != NULL); - assert(loader->fd < 0); - assert(loader->pid < 0); - assert(loader->data == NULL); - - loader->callback(NULL, loader->callback_data); - - return FALSE; -} - -static int -lyrics_start_plugin(struct lyrics_loader *loader, const char *plugin_path) -{ - int ret, fds[2]; - pid_t pid; - - assert(loader != NULL); - assert(loader->pid < 0); - assert(loader->fd < 0); - assert(loader->data == NULL); - - ret = pipe(fds); - if (ret < 0) - return -1; - - pid = fork(); - - if (pid < 0) { - close(fds[0]); - close(fds[1]); - return -1; - } - - if (pid == 0) { - dup2(fds[1], 1); - dup2(fds[1], 1); - close(fds[0]); - close(fds[1]); - close(0); - /* XXX close other fds? */ - - execl(plugin_path, plugin_path, - loader->artist, loader->title, NULL); - _exit(1); - } - - close(fds[1]); - - loader->pid = pid; - loader->fd = fds[0]; - loader->data = g_string_new(NULL); - - /* XXX CLOEXEC? */ - - loader->channel = g_io_channel_unix_new(loader->fd); - loader->event_id = g_io_add_watch(loader->channel, G_IO_IN|G_IO_HUP, - lyrics_data, loader); - - return 0; -} - -static void -lyrics_next_plugin(struct lyrics_loader *loader) -{ - const char *plugin_path; - int ret = -1; - - assert(loader->pid < 0); - assert(loader->fd < 0); - assert(loader->data == NULL); - - if (loader->next_plugin >= plugins->len) { - /* no plugins left */ - g_timeout_add(0, lyrics_delayed_fail, loader); - return; - } - - plugin_path = g_ptr_array_index(plugins, loader->next_plugin++); - ret = lyrics_start_plugin(loader, plugin_path); - if (ret < 0) { - /* system error */ - g_timeout_add(0, lyrics_delayed_fail, loader); - return; - } + plugin_list_deinit(&plugins); } -struct lyrics_loader * +struct plugin_cycle * lyrics_load(const char *artist, const char *title, - lyrics_callback_t callback, void *data) + plugin_callback_t callback, void *data) { - struct lyrics_loader *loader = g_new(struct lyrics_loader, 1); + const char *args[3] = { artist, title, NULL }; assert(artist != NULL); assert(title != NULL); - loader->artist = g_strdup(artist); - loader->title = g_strdup(title); - loader->callback = callback; - loader->data = data; - loader->next_plugin = 0; - loader->pid = -1; - loader->fd = -1; - loader->data = NULL; - - lyrics_next_plugin(loader); - - return loader; -} - -void -lyrics_free(struct lyrics_loader *loader) -{ - if (loader->fd >= 0) { - g_source_remove(loader->event_id); - g_io_channel_unref(loader->channel); - close(loader->fd); - } - - if (loader->pid > 0) { - int status; - - kill(loader->pid, SIGTERM); - waitpid(loader->pid, &status, 0); - } - - if (loader->data != NULL) - g_string_free(loader->data, TRUE); - - g_free(loader); + return plugin_run(&plugins, args, callback, data); }