diff options
Diffstat (limited to 'src/cue/cue_parser.c')
-rw-r--r-- | src/cue/cue_parser.c | 403 |
1 files changed, 0 insertions, 403 deletions
diff --git a/src/cue/cue_parser.c b/src/cue/cue_parser.c deleted file mode 100644 index bee757c9c..000000000 --- a/src/cue/cue_parser.c +++ /dev/null @@ -1,403 +0,0 @@ -/* - * Copyright (C) 2003-2011 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" -#include "cue_parser.h" -#include "string_util.h" -#include "song.h" -#include "tag.h" - -#include <glib.h> - -#include <assert.h> -#include <stdlib.h> - -struct cue_parser { - enum { - /** - * Parsing the CUE header. - */ - HEADER, - - /** - * Parsing a "FILE ... WAVE". - */ - WAVE, - - /** - * Ignore everything until the next "FILE". - */ - IGNORE_FILE, - - /** - * Parsing a "TRACK ... AUDIO". - */ - TRACK, - - /** - * Ignore everything until the next "TRACK". - */ - IGNORE_TRACK, - } state; - - struct tag *tag; - - char *filename; - - /** - * The song currently being edited. - */ - struct song *current; - - /** - * The previous song. It is remembered because its end_time - * will be set to the current song's start time. - */ - struct song *previous; - - /** - * A song that is completely finished and can be returned to - * the caller via cue_parser_get(). - */ - struct song *finished; - - /** - * Set to true after previous.end_time has been updated to the - * start time of the current song. - */ - bool last_updated; - - /** - * Tracks whether cue_parser_finish() has been called. If - * true, then all remaining (partial) results will be - * delivered by cue_parser_get(). - */ - bool end; -}; - -struct cue_parser * -cue_parser_new(void) -{ - struct cue_parser *parser = g_new(struct cue_parser, 1); - parser->state = HEADER; - parser->tag = tag_new(); - parser->filename = NULL; - parser->current = NULL; - parser->previous = NULL; - parser->finished = NULL; - parser->end = false; - return parser; -} - -void -cue_parser_free(struct cue_parser *parser) -{ - tag_free(parser->tag); - g_free(parser->filename); - - if (parser->current != NULL) - song_free(parser->current); - - if (parser->previous != NULL) - song_free(parser->previous); - - if (parser->finished != NULL) - song_free(parser->finished); - - g_free(parser); -} - -static const char * -cue_next_word(char *p, char **pp) -{ - assert(p >= *pp); - assert(!g_ascii_isspace(*p)); - - const char *word = p; - while (*p != 0 && !g_ascii_isspace(*p)) - ++p; - - *p = 0; - *pp = p + 1; - return word; -} - -static const char * -cue_next_quoted(char *p, char **pp) -{ - assert(p >= *pp); - assert(p[-1] == '"'); - - char *end = strchr(p, '"'); - if (end == NULL) { - /* syntax error - ignore it silently */ - *pp = p + strlen(p); - return p; - } - - *end = 0; - *pp = end + 1; - - return p; -} - -static const char * -cue_next_token(char **pp) -{ - char *p = strchug_fast(*pp); - if (*p == 0) - return NULL; - - return cue_next_word(p, pp); -} - -static const char * -cue_next_value(char **pp) -{ - char *p = strchug_fast(*pp); - if (*p == 0) - return NULL; - - if (*p == '"') - return cue_next_quoted(p + 1, pp); - else - return cue_next_word(p, pp); -} - -static void -cue_add_tag(struct tag *tag, enum tag_type type, char *p) -{ - const char *value = cue_next_value(&p); - if (value != NULL) - tag_add_item(tag, type, value); - -} - -static void -cue_parse_rem(char *p, struct tag *tag) -{ - const char *type = cue_next_token(&p); - if (type == NULL) - return; - - enum tag_type type2 = tag_name_parse_i(type); - if (type2 != TAG_NUM_OF_ITEM_TYPES) - cue_add_tag(tag, type2, p); -} - -static struct tag * -cue_current_tag(struct cue_parser *parser) -{ - if (parser->state == HEADER) - return parser->tag; - else if (parser->state == TRACK) - return parser->current->tag; - else - return NULL; -} - -static int -cue_parse_position(const char *p) -{ - char *endptr; - unsigned long minutes = strtoul(p, &endptr, 10); - if (endptr == p || *endptr != ':') - return -1; - - p = endptr + 1; - unsigned long seconds = strtoul(p, &endptr, 10); - if (endptr == p || *endptr != ':') - return -1; - - p = endptr + 1; - unsigned long frames = strtoul(p, &endptr, 10); - if (endptr == p || *endptr != 0) - return -1; - - return minutes * 60000 + seconds * 1000 + frames * 1000 / 75; -} - -/** - * Commit the current song. It will be moved to "previous", so the - * next song may soon edit its end time (using the next song's start - * time). - */ -static void -cue_parser_commit(struct cue_parser *parser) -{ - /* the caller of this library must call cue_parser_get() often - enough */ - assert(parser->finished == NULL); - assert(!parser->end); - - if (parser->current == NULL) - return; - - parser->finished = parser->previous; - parser->previous = parser->current; - parser->current = NULL; -} - -static void -cue_parser_feed2(struct cue_parser *parser, char *p) -{ - assert(parser != NULL); - assert(!parser->end); - assert(p != NULL); - - const char *command = cue_next_token(&p); - if (command == NULL) - return; - - if (strcmp(command, "REM") == 0) { - struct tag *tag = cue_current_tag(parser); - if (tag != NULL) - cue_parse_rem(p, tag); - } else if (strcmp(command, "PERFORMER") == 0) { - /* MPD knows a "performer" tag, but it is not a good - match for this CUE tag; from the Hydrogenaudio - Knowledgebase: "At top-level this will specify the - CD artist, while at track-level it specifies the - track artist." */ - - enum tag_type type = parser->state == TRACK - ? TAG_ARTIST - : TAG_ALBUM_ARTIST; - - struct tag *tag = cue_current_tag(parser); - if (tag != NULL) - cue_add_tag(tag, type, p); - } else if (strcmp(command, "TITLE") == 0) { - if (parser->state == HEADER) - cue_add_tag(parser->tag, TAG_ALBUM, p); - else if (parser->state == TRACK) - cue_add_tag(parser->current->tag, TAG_TITLE, p); - } else if (strcmp(command, "FILE") == 0) { - cue_parser_commit(parser); - - const char *filename = cue_next_value(&p); - if (filename == NULL) - return; - - const char *type = cue_next_token(&p); - if (type == NULL) - return; - - if (strcmp(type, "WAVE") != 0 && - strcmp(type, "MP3") != 0 && - strcmp(type, "AIFF") != 0) { - parser->state = IGNORE_FILE; - return; - } - - parser->state = WAVE; - g_free(parser->filename); - parser->filename = g_strdup(filename); - } else if (parser->state == IGNORE_FILE) { - return; - } else if (strcmp(command, "TRACK") == 0) { - cue_parser_commit(parser); - - const char *nr = cue_next_token(&p); - if (nr == NULL) - return; - - const char *type = cue_next_token(&p); - if (type == NULL) - return; - - if (strcmp(type, "AUDIO") != 0) { - parser->state = IGNORE_TRACK; - return; - } - - parser->state = TRACK; - parser->current = song_remote_new(parser->filename); - assert(parser->current->tag == NULL); - parser->current->tag = tag_dup(parser->tag); - tag_add_item(parser->current->tag, TAG_TRACK, nr); - parser->last_updated = false; - } else if (parser->state == IGNORE_TRACK) { - return; - } else if (parser->state == TRACK && strcmp(command, "INDEX") == 0) { - const char *nr = cue_next_token(&p); - if (nr == NULL) - return; - - const char *position = cue_next_token(&p); - if (position == NULL) - return; - - int position_ms = cue_parse_position(position); - if (position_ms < 0) - return; - - if (!parser->last_updated && parser->previous != NULL && - parser->previous->start_ms < (unsigned)position_ms) { - parser->last_updated = true; - parser->previous->end_ms = position_ms; - parser->previous->tag->time = - (parser->previous->end_ms - parser->previous->start_ms + 500) / 1000; - } - - parser->current->start_ms = position_ms; - } -} - -void -cue_parser_feed(struct cue_parser *parser, const char *line) -{ - assert(parser != NULL); - assert(!parser->end); - assert(line != NULL); - - char *allocated = g_strdup(line); - cue_parser_feed2(parser, allocated); - g_free(allocated); -} - -void -cue_parser_finish(struct cue_parser *parser) -{ - if (parser->end) - /* has already been called, ignore */ - return; - - cue_parser_commit(parser); - parser->end = true; -} - -struct song * -cue_parser_get(struct cue_parser *parser) -{ - assert(parser != NULL); - - if (parser->finished == NULL && parser->end) { - /* cue_parser_finish() has been called already: - deliver all remaining (partial) results */ - assert(parser->current == NULL); - - parser->finished = parser->previous; - parser->previous = NULL; - } - - struct song *song = parser->finished; - parser->finished = NULL; - return song; -} |