apps/playlist.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by wavey@wavey.org
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #ifndef __PLAYLIST_H__
  23 #define __PLAYLIST_H__
  24
  25 #include <stdbool.h>
  26 #include "config.h"
  27 #include "file.h"
  28 #include "kernel.h"
  29 #include "metadata.h"
  30
  31 #define PLAYLIST_ATTR_QUEUED    0x01
  32 #define PLAYLIST_ATTR_INSERTED  0x02
  33 #define PLAYLIST_ATTR_SKIPPED   0x04
  34 #define PLAYLIST_MAX_CACHE      16
  35
  36 #define PLAYLIST_DISPLAY_COUNT  10
  37
  38 #define DEFAULT_DYNAMIC_PLAYLIST_NAME "/dynamic.m3u8"
  39
  40 enum playlist_command {
  41     PLAYLIST_COMMAND_PLAYLIST,
  42     PLAYLIST_COMMAND_ADD,
  43     PLAYLIST_COMMAND_QUEUE,
  44     PLAYLIST_COMMAND_DELETE,
  45     PLAYLIST_COMMAND_SHUFFLE,
  46     PLAYLIST_COMMAND_UNSHUFFLE,
  47     PLAYLIST_COMMAND_RESET,
  48     PLAYLIST_COMMAND_COMMENT
  49 };
  50
  51 enum {
  52     PLAYLIST_PREPEND = -1,
  53     PLAYLIST_INSERT = -2,
  54     PLAYLIST_INSERT_LAST = -3,
  55     PLAYLIST_INSERT_FIRST = -4,
  56     PLAYLIST_INSERT_SHUFFLED = -5,
  57     PLAYLIST_REPLACE = -6,
  58     PLAYLIST_INSERT_LAST_SHUFFLED = -7
  59 };
  60
  61 enum {
  62     PLAYLIST_DELETE_CURRENT = -1
  63 };
  64
  65 struct playlist_control_cache {
  66     enum playlist_command command;
  67     int i1;
  68     int i2;
  69     const char* s1;
  70     const char* s2;
  71     void* data;
  72 };
  73
  74 struct playlist_info
  75 {
  76     bool current;        /* current playing playlist                */
  77     char filename[MAX_PATH];  /* path name of m3u playlist on disk  */
  78     char control_filename[MAX_PATH]; /* full path of control file   */
  79     bool utf8;           /* playlist is in .m3u8 format             */
  80     int  fd;             /* descriptor of the open playlist file    */
  81     int  control_fd;     /* descriptor of the open control file     */
  82     bool control_created; /* has control file been created?         */
  83     int  dirlen;         /* Length of the path to the playlist file */
  84     volatile unsigned long *indices; /* array of indices            */
  85     volatile int *filenames;         /* Array of dircache indices   */
  86     int  max_playlist_size; /* Max number of files in playlist. Mirror of
  87                               global_settings.max_files_in_playlist */
  88     bool in_ram;         /* playlist stored in ram (dirplay)        */
  89     int buffer_handle;   /* handle to the below buffer (-1 if non-buflib) */
  90
  91     union {
  92         volatile char *buffer;/* buffer for in-ram playlists        */
  93         int  *seek_buf;       /* buffer for seeks in real playlists */
  94     };
  95     int  buffer_size;    /* size of buffer                          */
  96     int  buffer_end_pos; /* last position where buffer was written  */
  97     int  index;          /* index of current playing track          */
  98     int  first_index;    /* index of first song in playlist         */
  99     int  amount;         /* number of tracks in the index           */
 100     int  last_insert_pos; /* last position we inserted a track      */
 101     int  seed;           /* shuffle seed                            */
 102     bool shuffle_modified; /* has playlist been shuffled with
 103                               inserted tracks?                      */
 104     bool deleted;        /* have any tracks been deleted?           */
 105     int num_inserted_tracks; /* number of tracks inserted           */
 106     bool started;       /* has playlist been started?               */
 107
 108     /* cache of playlist control commands waiting to be flushed to
 109        to disk                                                      */
 110     struct playlist_control_cache control_cache[PLAYLIST_MAX_CACHE];
 111     int num_cached;      /* number of cached entries                */
 112     bool pending_control_sync; /* control file needs to be synced   */
 113
 114     struct mutex *control_mutex; /* mutex for control file access    */
 115     int last_shuffled_start; /* number of tracks when insert last
 116                                     shuffled command start */
 117 };
 118
 119 struct playlist_track_info
 120 {
 121     char filename[MAX_PATH]; /* path name of mp3 file               */
 122     int  attr;               /* playlist attributes for track       */
 123     int  index;              /* index of track in playlist          */
 124     int  display_index;      /* index of track for display          */
 125 };
 126
 127 /* Exported functions only for current playlist. */
 128 void playlist_init(void) INIT_ATTR;
 129 void playlist_shutdown(void);
 130 int playlist_create(const char *dir, const char *file);
 131 int playlist_resume(void);
 132 int playlist_add(const char *filename);
 133 int playlist_shuffle(int random_seed, int start_index);
 134 unsigned int playlist_get_filename_crc32(struct playlist_info *playlist,
 135                                          int index);
 136 void playlist_resume_track(int start_index, unsigned int crc, int offset);
 137 void playlist_start(int start_index, int offset);
 138 bool playlist_check(int steps);
 139 const char *playlist_peek(int steps, char* buf, size_t buf_size);
 140 int playlist_next(int steps);
 141 #if CONFIG_CODEC == SWCODEC
 142 bool playlist_next_dir(int direction);
 143 #endif
 144 int playlist_get_resume_info(int *resume_index);
 145 int playlist_update_resume_info(const struct mp3entry* id3);
 146 int playlist_get_display_index(void);
 147 int playlist_amount(void);
 148 void playlist_set_last_shuffled_start(void);
 149 struct playlist_info *playlist_get_current(void);
 150
 151 /* Exported functions for all playlists.  Pass NULL for playlist_info
 152    structure to work with current playlist. */
 153 int playlist_create_ex(struct playlist_info* playlist,
 154                        const char* dir, const char* file,
 155                        void* index_buffer, int index_buffer_size,
 156                        void* temp_buffer, int temp_buffer_size);
 157 int playlist_set_current(struct playlist_info* playlist);
 158 void playlist_close(struct playlist_info* playlist);
 159 void playlist_sync(struct playlist_info* playlist);
 160 int playlist_insert_track(struct playlist_info* playlist, const char *filename,
 161                           int position, bool queue, bool sync);
 162 int playlist_insert_directory(struct playlist_info* playlist,
 163                               const char *dirname, int position, bool queue,
 164                               bool recurse);
 165 int playlist_insert_playlist(struct playlist_info* playlist, const char *filename,
 166                              int position, bool queue);
 167 #if CONFIG_CODEC == SWCODEC
 168 void playlist_skip_entry(struct playlist_info *playlist, int steps);
 169 #endif
 170 int playlist_delete(struct playlist_info* playlist, int index);
 171 int playlist_move(struct playlist_info* playlist, int index, int new_index);
 172 int playlist_randomise(struct playlist_info* playlist, unsigned int seed,
 173                        bool start_current);
 174 int playlist_sort(struct playlist_info* playlist, bool start_current);
 175 bool playlist_modified(const struct playlist_info* playlist);
 176 int playlist_get_first_index(const struct playlist_info* playlist);
 177 int playlist_get_seed(const struct playlist_info* playlist);
 178 int playlist_amount_ex(const struct playlist_info* playlist);
 179 char *playlist_name(const struct playlist_info* playlist, char *buf,
 180                     int buf_size);
 181 char *playlist_get_name(const struct playlist_info* playlist, char *buf,
 182                         int buf_size);
 183 int playlist_get_track_info(struct playlist_info* playlist, int index,
 184                             struct playlist_track_info* info);
 185 int playlist_save(struct playlist_info* playlist, char *filename);
 186 int playlist_directory_tracksearch(const char* dirname, bool recurse,
 187                                    int (*callback)(char*, void*),
 188                                    void* context);
 189 int playlist_remove_all_tracks(struct playlist_info *playlist);
 190
 191 #endif /* __PLAYLIST_H__ */