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Diffstat (limited to 'src/SongUpdate.cxx')
| -rw-r--r-- | src/SongUpdate.cxx | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/SongUpdate.cxx b/src/SongUpdate.cxx new file mode 100644 index 000000000..114ad875c --- /dev/null +++ b/src/SongUpdate.cxx @@ -0,0 +1,210 @@ +/* + * Copyright (C) 2003-2013 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 "config.h" /* must be first for large file support */ + +extern "C" { +#include "song.h" +#include "uri.h" +} + +#include "directory.h" + +extern "C" { +#include "mapper.h" +#include "decoder_list.h" +#include "decoder_plugin.h" +#include "tag_ape.h" +#include "tag_id3.h" +#include "tag.h" +#include "tag_handler.h" +#include "input_stream.h" +} + +#include <glib.h> + +#include <assert.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <stdio.h> + +struct song * +song_file_load(const char *path, struct directory *parent) +{ + struct song *song; + bool ret; + + assert((parent == NULL) == g_path_is_absolute(path)); + assert(!uri_has_scheme(path)); + assert(strchr(path, '\n') == NULL); + + song = song_file_new(path, parent); + + //in archive ? + if (parent != NULL && parent->device == DEVICE_INARCHIVE) { + ret = song_file_update_inarchive(song); + } else { + ret = song_file_update(song); + } + if (!ret) { + song_free(song); + return NULL; + } + + return song; +} + +/** + * Attempts to load APE or ID3 tags from the specified file. + */ +static bool +tag_scan_fallback(const char *path, + const struct tag_handler *handler, void *handler_ctx) +{ + return tag_ape_scan2(path, handler, handler_ctx) || + tag_id3_scan(path, handler, handler_ctx); +} + +bool +song_file_update(struct song *song) +{ + const char *suffix; + char *path_fs; + const struct decoder_plugin *plugin; + struct stat st; + struct input_stream *is = NULL; + + assert(song_is_file(song)); + + /* check if there's a suffix and a plugin */ + + suffix = uri_get_suffix(song->uri); + if (suffix == NULL) + return false; + + plugin = decoder_plugin_from_suffix(suffix, NULL); + if (plugin == NULL) + return false; + + path_fs = map_song_fs(song); + if (path_fs == NULL) + return false; + + if (song->tag != NULL) { + tag_free(song->tag); + song->tag = NULL; + } + + if (stat(path_fs, &st) < 0 || !S_ISREG(st.st_mode)) { + g_free(path_fs); + return false; + } + + song->mtime = st.st_mtime; + + GMutex *mutex = NULL; + GCond *cond; +#if !GCC_CHECK_VERSION(4, 2) + /* work around "may be used uninitialized in this function" + false positive */ + cond = NULL; +#endif + + do { + /* load file tag */ + song->tag = tag_new(); + if (decoder_plugin_scan_file(plugin, path_fs, + &full_tag_handler, song->tag)) + break; + + tag_free(song->tag); + song->tag = NULL; + + /* fall back to stream tag */ + if (plugin->scan_stream != NULL) { + /* open the input_stream (if not already + open) */ + if (is == NULL) { + mutex = g_mutex_new(); + cond = g_cond_new(); + is = input_stream_open(path_fs, mutex, cond, + NULL); + } + + /* now try the stream_tag() method */ + if (is != NULL) { + song->tag = tag_new(); + if (decoder_plugin_scan_stream(plugin, is, + &full_tag_handler, + song->tag)) + break; + + tag_free(song->tag); + song->tag = NULL; + + input_stream_lock_seek(is, 0, SEEK_SET, NULL); + } + } + + plugin = decoder_plugin_from_suffix(suffix, plugin); + } while (plugin != NULL); + + if (is != NULL) + input_stream_close(is); + + if (mutex != NULL) { + g_cond_free(cond); + g_mutex_free(mutex); + } + + if (song->tag != NULL && tag_is_empty(song->tag)) + tag_scan_fallback(path_fs, &full_tag_handler, song->tag); + + g_free(path_fs); + return song->tag != NULL; +} + +bool +song_file_update_inarchive(struct song *song) +{ + const char *suffix; + const struct decoder_plugin *plugin; + + assert(song_is_file(song)); + + /* check if there's a suffix and a plugin */ + + suffix = uri_get_suffix(song->uri); + if (suffix == NULL) + return false; + + plugin = decoder_plugin_from_suffix(suffix, nullptr); + if (plugin == NULL) + return false; + + if (song->tag != NULL) + tag_free(song->tag); + + //accept every file that has music suffix + //because we don't support tag reading through + //input streams + song->tag = tag_new(); + + return true; +} |