X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=playlist.c;h=9a6e4829082a4b6e772338762119f6b9525328a4;hb=9055c71be97f1095dcdbd83da305b600f204f763;hp=272f25ac01edf74d7a7b5f38d8c1efa82b7f2b59;hpb=782375e0897199259d6666c4c2ec7f963210a953;p=paraslash.git diff --git a/playlist.c b/playlist.c index 272f25ac..9a6e4829 100644 --- a/playlist.c +++ b/playlist.c @@ -1,19 +1,27 @@ +/* Copyright (C) 2007 Andre Noll , see file COPYING. */ + +#include +#include +#include + #include "para.h" #include "error.h" +#include "string.h" #include "afh.h" #include "afs.h" -#include "string.h" +#include "ipc.h" +#include "sideband.h" /** \file playlist.c Functions for loading and saving playlists. */ /** Structure used for adding entries to a playlist. */ -struct playlist_info { +struct playlist_instance { /** The name of the playlist. */ char *name; /** The number of entries currently in the playlist. */ unsigned length; }; -static struct playlist_info current_playlist; +static struct playlist_instance current_playlist; /** * Re-insert an audio file into the tree of admissible files. @@ -22,123 +30,202 @@ static struct playlist_info current_playlist; * * \return The return value of score_update(). */ -int playlist_update_audio_file(struct osl_row *aft_row) +static int playlist_update_audio_file(const struct osl_row *aft_row) { /* always re-insert to the top of the tree */ return score_update(aft_row, 0); } -static int add_playlist_entry(char *line, void *data) +static int add_playlist_entry(char *path, void *data) { - struct playlist_info *playlist = data; + struct playlist_instance *playlist = data; struct osl_row *aft_row; - int ret = aft_get_row_of_path(line, &aft_row); + int ret = aft_get_row_of_path(path, &aft_row); if (ret < 0) { - PARA_NOTICE_LOG("path not found in audio file table: %s\n", - line); + PARA_NOTICE_LOG("%s: %s\n", path, para_strerror(-ret)); return 1; } ret = score_add(aft_row, -playlist->length); if (ret < 0) { - PARA_ERROR_LOG("failed to add %s: %d\n", line, ret); + PARA_ERROR_LOG("failed to add %s: %s\n", path, para_strerror(-ret)); return ret; } playlist->length++; return 1; } -static int load_playlist(struct osl_row *row, struct playlist_info *playlist) +static int check_playlist_path(char *path, void *data) { - struct osl_object obj; - int ret; + struct para_buffer *pb = data; + struct osl_row *aft_row; + int ret = aft_get_row_of_path(path, &aft_row); - ret = osl_get_object(playlists_table, row, BLOBCOL_NAME, &obj); - if (ret < 0) - return ret; - playlist->name = para_strdup(obj.data); - playlist->length = 0; - ret = osl_open_disk_object(playlists_table, row, BLOBCOL_DEF, &obj); if (ret < 0) - goto err; - ret = for_each_line_ro(obj.data, obj.size, add_playlist_entry, - playlist); - osl_close_disk_object(&obj); - if (ret < 0) - goto err; - ret = -E_PLAYLIST_EMPTY; - if (!playlist->length) - goto err; - PARA_NOTICE_LOG("loaded playlist %s (%u files)\n", playlist->name, - playlist->length); - return 1; -err: - free(playlist->name); - return ret; + para_printf(pb, "%s: %s\n", path, para_strerror(-ret)); + return 1; /* do not fail the loop on bad paths */ } -/* returns -E_PLAYLIST_LOADED on _success_ to terminate the loop */ -static int playlist_loop(struct osl_row *row, void *data) +static int check_playlist(struct osl_row *row, void *data) { - struct playlist_info *playlist = data; - int ret = load_playlist(row, playlist); - if (ret < 0) { - if (ret != -E_DUMMY_ROW) - PARA_NOTICE_LOG("unable to load playlist, trying next\n"); - return 1; - } - return -E_PLAYLIST_LOADED; -} + struct para_buffer *pb = data; + struct osl_object playlist_def; + char *playlist_name; + int ret = pl_get_name_and_def_by_row(row, &playlist_name, &playlist_def); -static int load_first_available_playlist(struct playlist_info *playlist) -{ - int ret = osl_rbtree_loop(playlists_table, BLOBCOL_NAME, playlist, - playlist_loop); - if (ret == -E_PLAYLIST_LOADED) /* success */ + if (ret < 0) { /* log error, but continue */ + para_printf(pb, "failed to get playlist data: %s\n", + para_strerror(-ret)); return 1; - if (ret < 0) - return ret; /* error */ - PARA_NOTICE_LOG("no valid playlist found\n"); - return -E_NO_PLAYLIST; + } + if (*playlist_name) { /* skip dummy row */ + para_printf(pb, "checking playlist %s...\n", playlist_name); + for_each_line(FELF_READ_ONLY, playlist_def.data, + playlist_def.size, check_playlist_path, pb); + } + osl_close_disk_object(&playlist_def); + return 1; } /** - * Close the current playlist. + * Check the playlist table for inconsistencies. * - * \sa playlist_open(). + * \param aca This callback ignores ->query. + * + * \return Standard. Invalid paths are reported, but are not considered an + * error. */ -void playlist_close(void) +int playlist_check_callback(struct afs_callback_arg *aca) +{ + para_printf(&aca->pbout, "checking playlists...\n"); + return osl(osl_rbtree_loop(playlists_table, BLOBCOL_ID, &aca->pbout, + check_playlist)); +} + +/** Free all resources of the current playlist, if any. */ +void playlist_unload(void) { + if (!current_playlist.name) + return; free(current_playlist.name); current_playlist.name = NULL; + current_playlist.length = 0; } /** - * Open the given playlist. + * Populate the score table from the paths of a playlist database object. * - * \param name The name of the playlist to open. + * This loads the blob object which corresponds to the given name from the + * playlist table. Each line of the blob is regarded as a path which is looked + * up in the audio file table. If the path lookup succeeds, a reference to the + * corresponding row of the audio file table is added to the score table. * - * If name is \p NULL, load the first available playlist. Files which are - * listed in the playlist, but not contained in the database are ignored. - * This is not considered an error. + * \param name The name of the playlist to load. + * \param msg Error message or playlist info is returned here. * - * \return Positive on success, negative on errors. Possible errors - * include: Given playlist not found, -E_NO_PLAYLIST (no playlist defined). + * \return The length of the loaded playlist on success, negative error code + * else. Files which are listed in the playlist, but are not contained in the + * database are ignored. This is not considered an error. */ -int playlist_open(char *name) +int playlist_load(const char *name, char **msg) { - struct osl_object obj; int ret; - struct osl_row *row; + struct playlist_instance *playlist = ¤t_playlist; + struct osl_object playlist_def; - if (!name) - return load_first_available_playlist(¤t_playlist); - obj.data = name; - obj.size = strlen(obj.data); - ret = osl_get_row(playlists_table, BLOBCOL_NAME, &obj, &row); + ret = pl_get_def_by_name(name, &playlist_def); if (ret < 0) { - PARA_NOTICE_LOG("failed to load playlist %s\n", name); + *msg = make_message("could not read playlist %s\n", name); + return ret; + } + playlist_unload(); + ret = for_each_line(FELF_READ_ONLY, playlist_def.data, + playlist_def.size, add_playlist_entry, playlist); + osl_close_disk_object(&playlist_def); + if (ret < 0) + goto err; + ret = -E_PLAYLIST_EMPTY; + if (!playlist->length) + goto err; + playlist->name = para_strdup(name); + *msg = make_message("loaded playlist %s (%u files)\n", playlist->name, + playlist->length); + /* success */ + return current_playlist.length; +err: + PARA_NOTICE_LOG("unable to load playlist %s\n", name); + *msg = make_message("unable to load playlist %s\n", name); + return ret; +} + +static int search_path(char *path, void *data) +{ + if (strcmp(path, data)) + return 1; + return -E_PATH_FOUND; +} + +static int handle_audio_file_event(enum afs_events event, void *data) +{ + int ret; + bool was_admissible = false, is_admissible; + struct osl_object playlist_def; + char *new_path; + const struct osl_row *row = data; + + if (event == AUDIO_FILE_RENAME) + was_admissible = row_belongs_to_score_table(row); + ret = get_audio_file_path_of_row(row, &new_path); + if (ret < 0) + return ret; + ret = pl_get_def_by_name(current_playlist.name, &playlist_def); + if (ret < 0) return ret; + ret = for_each_line(FELF_READ_ONLY, playlist_def.data, + playlist_def.size, search_path, new_path); + osl_close_disk_object(&playlist_def); + is_admissible = (ret < 0); + if (was_admissible && is_admissible) + return 1; + if (!was_admissible && !is_admissible) + return 1; + if (was_admissible && !is_admissible) { + current_playlist.length--; + return score_delete(row); + } + /* !was_admissible && is_admissible */ + current_playlist.length++; + return score_add(row, 0); /* play it immediately */ +} + +/** + * Handle afs events relevant to playlists. + * + * \param event The event type. + * \param pb Unused. + * \param data Depends on the event type. + * + * \return Standard. + */ +int playlists_event_handler(enum afs_events event, + __a_unused struct para_buffer *pb, void *data) +{ + struct afsi_change_event_data *aced = data; + + if (!current_playlist.name) + return 1; + switch (event) { + case AFSI_CHANGE: + return playlist_update_audio_file(aced->aft_row); + case AUDIO_FILE_RENAME: + case AUDIO_FILE_ADD: + return handle_audio_file_event(event, data); + case AUDIO_FILE_REMOVE: + if (!row_belongs_to_score_table(data)) + return 1; + current_playlist.length--; + return score_delete(data); + default: + return 1; } - return load_playlist(row, ¤t_playlist); }