afs.h

   1 /*
   2  * Copyright (C) 2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file afs.h Exported symbos of the audio file selector. */
   8
   9 #include <regex.h>
  10 #include "osl.h"
  11 #include "hash.h"
  12
  13 /** Audio file selector data stored in the audio file table. */
  14 struct afs_info {
  15         /** Seconds since the epoch. */
  16         uint64_t last_played;
  17         /** Bit field of set attributes. */
  18         uint64_t attributes;
  19         /** Counts how many times the file was selected. */
  20         uint32_t num_played;
  21         /** Image blob associated with this file (foreign key). */
  22         uint32_t image_id;
  23         /** Lyrics blob associated with this file (foreign key). */
  24         uint32_t lyrics_id;
  25         /** Mp3, ogg or aac. */
  26         uint8_t audio_format_id;
  27 };
  28
  29 enum afs_events {
  30         ATTRIBUTE_ADD,
  31         ATTRIBUTE_RENAME,
  32         ATTRIBUTE_REMOVE,
  33         AFSI_CHANGE,
  34         AFHI_CHANGE,
  35         AUDIO_FILE_RENAME,
  36         AUDIO_FILE_ADD,
  37         AUDIO_FILE_REMOVE,
  38         BLOB_ADD,
  39         BLOB_RENAME,
  40         BLOB_REMOVE,
  41
  42 };
  43
  44 struct rmatt_event_data {
  45         const char *name;
  46         unsigned char bitnum;
  47 };
  48
  49
  50 struct addatt_event_data {
  51         const char *name;
  52         unsigned char bitnum;
  53 };
  54
  55 struct afsi_change_event_data {
  56         const struct osl_row *aft_row;
  57         struct afs_info *old_afsi;
  58 };
  59
  60 struct afs_table {
  61         void (*init)(struct afs_table *t);
  62         const char *name;
  63         int (*open)(const char *base_dir);
  64         void (*close)(void);
  65         int (*create)(const char *);
  66         int (*event_handler)(enum afs_events event, struct para_buffer *pb,
  67                 void *data);
  68         /* int *(check)() */
  69 };
  70
  71 enum play_mode {PLAY_MODE_MOOD, PLAY_MODE_PLAYLIST};
  72
  73 struct audio_file_data {
  74         enum play_mode current_play_mode;
  75         int fd;
  76         long score;
  77         struct afs_info afsi;
  78         struct audio_format_info afhi;
  79         char *path;
  80 };
  81
  82 enum afs_server_code {
  83         NEXT_AUDIO_FILE,
  84         AFD_CHANGE
  85 };
  86
  87 /** Flags passed to for_each_matching_row(). */
  88 enum pattern_match_flags {
  89         /** Loop in reverse order. */
  90         PM_REVERSE_LOOP = 1,
  91         /** If no pattern is given, loop over all rows. */
  92         PM_NO_PATTERN_MATCHES_EVERYTHING = 2,
  93         /** If the data in match_column is the empty string, skip this row. */
  94         PM_SKIP_EMPTY_NAME = 4,
  95 };
  96
  97 /** Structure passed to for_each_matching_row(). */
  98 struct pattern_match_data {
  99         /** Loop over all rows in this table. */
 100         struct osl_table *table;
 101         /** Determines the loop order. Must be an rbtree column. */
 102         unsigned loop_col_num;
 103         /** Data from this column is matched against the given patterns. */
 104         unsigned match_col_num;
 105         /** \see pattern_match_flags. */
 106         unsigned pm_flags;
 107         /** This value is passed verbatim to fnmatch(). */
 108         int fnmatch_flags;
 109         /** Null-terminated array of patterns. */
 110         struct osl_object patterns;
 111         /** Data pointer passed to the action function. */
 112         void *data;
 113         /** For each matching row, this function will be called. */
 114         int (*action)(struct osl_table *table, struct osl_row *row, const char *name, void *data);
 115 };
 116
 117 /* afs */
 118 typedef int callback_function(const struct osl_object *, struct osl_object *);
 119 __noreturn void afs_init(uint32_t cookie, int socket_fd);
 120 void afs_event(enum afs_events event, struct para_buffer *pb,
 121         void *data);
 122 int send_callback_request(callback_function *f, struct osl_object *query,
 123         struct osl_object *result);
 124 int send_standard_callback_request(int argc, char * const * const argv,
 125                 callback_function *f, struct osl_object *result);
 126 int send_option_arg_callback_request(struct osl_object *options,
 127         int argc, char * const * const argv, callback_function *f,
 128         struct osl_object *result);
 129 int stdin_command(int fd, struct osl_object *arg_obj, callback_function *f,
 130                 unsigned max_len, struct osl_object *result);
 131 int string_compare(const struct osl_object *obj1, const struct osl_object *obj2);
 132 int close_audio_file(struct audio_file_data *afd);
 133 int for_each_matching_row(struct pattern_match_data *pmd);
 134
 135 /* score */
 136 void score_init(struct afs_table *t);
 137 int admissible_file_loop(void *data, osl_rbtree_loop_func *func);
 138 int admissible_file_loop_reverse(void *data, osl_rbtree_loop_func *func);
 139 int score_get_best(struct osl_row **aft_row, long *score);
 140 int get_score_and_aft_row(struct osl_row *score_row, long *score, struct osl_row **aft_row);
 141 int score_add(const struct osl_row *row, long score);
 142 int score_update(const struct osl_row *aft_row, long new_score);
 143 int get_num_admissible_files(unsigned *num);
 144 int score_delete(const struct osl_row *aft_row);
 145 int clear_score_table(void);
 146 int row_belongs_to_score_table(const struct osl_row *aft_row, unsigned *rank);
 147
 148 /* attribute */
 149 void attribute_init(struct afs_table *t);
 150 void get_attribute_bitmap(const uint64_t *atts, char *buf); /* needed by com_ls() */
 151 int get_attribute_bitnum_by_name(const char *att_name, unsigned char *bitnum);
 152 int get_attribute_text(uint64_t *atts, const char *delim, char **text);
 153
 154 /* aft */
 155 void aft_init(struct afs_table *t);
 156 int aft_get_row_of_path(const char *path, struct osl_row **row);
 157 int open_and_update_audio_file(struct osl_row *aft_row, struct audio_file_data *afd);
 158 int load_afd(int shmid, struct audio_file_data *afd);
 159 int load_afsi(struct afs_info *afsi, struct osl_object *obj);
 160 void save_afsi(struct afs_info *afsi, struct osl_object *obj);
 161 int get_afsi_of_row(const struct osl_row *row, struct afs_info *afsi);
 162 int get_afhi_of_row(const struct osl_row *row, struct audio_format_info *afhi);
 163 int get_afsi_of_path(const char *path, struct afs_info *afsi);
 164 int get_audio_file_path_of_row(const struct osl_row *row, char **path);
 165 int get_afsi_object_of_row(const struct osl_row *row, struct osl_object *obj);
 166 int audio_file_loop(void *private_data, osl_rbtree_loop_func *func);
 167 int aft_check_callback(const struct osl_object *query, struct osl_object *result);
 168
 169 /* mood */
 170 int change_current_mood(char *mood_name);
 171 void close_current_mood(void);
 172 int reload_current_mood(void);
 173 int mood_check_callback(__a_unused const struct osl_object *query,
 174         struct osl_object *result);
 175
 176
 177 /* playlist */
 178 int playlist_open(char *name);
 179 void playlist_close(void);
 180 int playlist_update_audio_file(struct osl_row *aft_row);
 181 int playlist_check_callback(__a_unused const struct osl_object *query,
 182         struct osl_object *result);
 183
 184 /** evaluates to 1 if x < y, to -1 if x > y and to 0 if x == y */
 185 #define NUM_COMPARE(x, y) ((int)((x) < (y)) - (int)((x) > (y)))
 186
 187
 188 #define DECLARE_BLOB_SYMBOLS(table_name, cmd_prefix) \
 189         void table_name ## _init(struct afs_table *t); \
 190         int cmd_prefix ## _get_name_by_id(uint32_t id, char **name); \
 191         int cmd_prefix ## _get_def_by_id(uint32_t id, struct osl_object *def); \
 192         int cmd_prefix ## _get_def_by_name(char *name, struct osl_object *def); \
 193         int cmd_prefix ## _get_name_and_def_by_row(const struct osl_row *row, \
 194                 char **name, struct osl_object *def); \
 195         int table_name ##_event_handler(enum afs_events event, \
 196                 struct para_buffer *pb, void *data); \
 197         extern struct osl_table *table_name ## _table;
 198
 199 DECLARE_BLOB_SYMBOLS(lyrics, lyr);
 200 DECLARE_BLOB_SYMBOLS(images, img);
 201 DECLARE_BLOB_SYMBOLS(moods, mood);
 202 DECLARE_BLOB_SYMBOLS(playlists, pl);
 203
 204 /** The columns of an abstract blob table. */
 205 enum blob_table_columns {
 206         /** The identifier, a positive integer that never repeats. */
 207         BLOBCOL_ID,
 208         /** The unique name of the blob. */
 209         BLOBCOL_NAME,
 210         /** The actual blob contents. */
 211         BLOBCOL_DEF,
 212         /** A blob table has that many columns. */
 213         NUM_BLOB_COLUMNS
 214 };
 215
 216 #define DEFINE_BLOB_TABLE_DESC(table_name) \
 217         struct osl_table_description table_name ## _table_desc = { \
 218                 .name = #table_name, \
 219                 .num_columns = NUM_BLOB_COLUMNS, \
 220                 .flags = OSL_LARGE_TABLE, \
 221                 .column_descriptions = blob_cols \
 222         };
 223
 224 #define DEFINE_BLOB_TABLE_PTR(table_name) struct osl_table *table_name ## _table;
 225
 226 #define INIT_BLOB_TABLE(table_name) \
 227         DEFINE_BLOB_TABLE_DESC(table_name); \
 228         DEFINE_BLOB_TABLE_PTR(table_name);
 229