apps/cuesheet.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 Nicolas Pennequin, Jonathan Gordon
  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 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <stdbool.h>
  25 #include <ctype.h>
  26 #include <string.h>
  27 #include "system.h"
  28 #include "audio.h"
  29 #include "kernel.h"
  30 #include "logf.h"
  31 #include "misc.h"
  32 #include "screens.h"
  33 #include "list.h"
  34 #include "action.h"
  35 #include "lang.h"
  36 #include "debug.h"
  37 #include "settings.h"
  38 #include "plugin.h"
  39 #include "playback.h"
  40 #include "cuesheet.h"
  41 #include "gui/wps.h"
  42
  43 #define CUE_DIR ROCKBOX_DIR "/cue"
  44
  45 bool look_for_cuesheet_file(const char *trackpath, char *found_cue_path)
  46 {
  47     /* DEBUGF("look for cue file\n"); */
  48
  49     char cuepath[MAX_PATH];
  50     char *dot, *slash;
  51
  52     slash = strrchr(trackpath, '/');
  53     if (!slash)
  54     {
  55         found_cue_path = NULL;
  56         return false;
  57     }
  58
  59     strlcpy(cuepath, trackpath, MAX_PATH);
  60     dot = strrchr(cuepath, '.');
  61     strcpy(dot, ".cue");
  62
  63     if (!file_exists(cuepath))
  64     {
  65         strcpy(cuepath, CUE_DIR);
  66         strcat(cuepath, slash);
  67         char *dot = strrchr(cuepath, '.');
  68         strcpy(dot, ".cue");
  69         if (!file_exists(cuepath))
  70         {
  71             if (found_cue_path)
  72                 found_cue_path = NULL;
  73             return false;
  74         }
  75     }
  76
  77     if (found_cue_path)
  78         strlcpy(found_cue_path, cuepath, MAX_PATH);
  79     return true;
  80 }
  81
  82 static char *get_string(const char *line)
  83 {
  84     char *start, *end;
  85
  86     start = strchr(line, '"');
  87     if (!start)
  88     {
  89         start = strchr(line, ' ');
  90
  91         if (!start)
  92             return NULL;
  93     }
  94
  95     end = strchr(++start, '"');
  96     if (end)
  97         *end = '\0';
  98
  99     return start;
 100 }
 101
 102 /* parse cuesheet "file" and store the information in "cue" */
 103 bool parse_cuesheet(char *file, struct cuesheet *cue)
 104 {
 105     char line[MAX_PATH];
 106     char *s;
 107     bool utf8 = false;
 108
 109     int fd = open_utf8(file,O_RDONLY);
 110     if (fd < 0)
 111     {
 112         /* couln't open the file */
 113         return false;
 114     }
 115     if(lseek(fd, 0, SEEK_CUR) > 0)
 116         utf8 = true;
 117
 118     /* Initialization */
 119     memset(cue, 0, sizeof(struct cuesheet));
 120     strcpy(cue->path, file);
 121     cue->curr_track = cue->tracks;
 122
 123     while ( read_line(fd,line,MAX_PATH) && cue->track_count < MAX_TRACKS )
 124     {
 125         s = skip_whitespace(line);
 126
 127         if (!strncmp(s, "TRACK", 5))
 128         {
 129             cue->track_count++;
 130         }
 131         else if (!strncmp(s, "INDEX 01", 8))
 132         {
 133             s = strchr(s,' ');
 134             s = skip_whitespace(s);
 135             s = strchr(s,' ');
 136             s = skip_whitespace(s);
 137             cue->tracks[cue->track_count-1].offset = 60*1000 * atoi(s);
 138             s = strchr(s,':') + 1;
 139             cue->tracks[cue->track_count-1].offset += 1000 * atoi(s);
 140             s = strchr(s,':') + 1;
 141             cue->tracks[cue->track_count-1].offset += 13 * atoi(s);
 142         }
 143         else if (!strncmp(s, "TITLE", 5)
 144                  || !strncmp(s, "PERFORMER", 9)
 145                  || !strncmp(s, "SONGWRITER", 10))
 146         {
 147             char *dest = NULL;
 148             char *string = get_string(s);
 149             if (!string)
 150                 break;
 151
 152             switch (*s)
 153             {
 154                 case 'T': /* TITLE */
 155                     dest = (cue->track_count <= 0) ? cue->title :
 156                             cue->tracks[cue->track_count-1].title;
 157                     break;
 158
 159                 case 'P': /* PERFORMER */
 160                     dest = (cue->track_count <= 0) ? cue->performer :
 161                         cue->tracks[cue->track_count-1].performer;
 162                     break;
 163
 164                 case 'S': /* SONGWRITER */
 165                     dest = (cue->track_count <= 0) ? cue->songwriter :
 166                             cue->tracks[cue->track_count-1].songwriter;
 167                     break;
 168             }
 169
 170             if (dest)
 171             {
 172                 if (!utf8)
 173                 {
 174                     dest = iso_decode(string, dest, -1, MIN(strlen(string), MAX_NAME));
 175                     *dest = '\0';
 176                 }
 177                 else
 178                 {
 179                     strlcpy(dest, string, MAX_NAME*3 + 1);
 180                 }
 181             }
 182         }
 183     }
 184     close(fd);
 185
 186     /* If some songs don't have performer info, we copy the cuesheet performer */
 187     int i;
 188     for (i = 0; i < cue->track_count; i++)
 189     {
 190         if (*(cue->tracks[i].performer) == '\0')
 191             strlcpy(cue->tracks[i].performer, cue->performer, MAX_NAME*3);
 192
 193         if (*(cue->tracks[i].songwriter) == '\0')
 194             strlcpy(cue->tracks[i].songwriter, cue->songwriter, MAX_NAME*3);
 195     }
 196
 197     return true;
 198 }
 199
 200 /* takes care of seeking to a track in a playlist
 201  * returns false if audio  isn't playing */
 202 static bool seek(unsigned long pos)
 203 {
 204     if (!(audio_status() & AUDIO_STATUS_PLAY))
 205     {
 206         return false;
 207     }
 208     else
 209     {
 210 #if (CONFIG_CODEC == SWCODEC)
 211         audio_pre_ff_rewind();
 212         audio_ff_rewind(pos);
 213 #else
 214         audio_pause();
 215         audio_ff_rewind(pos);
 216         audio_resume();
 217 #endif
 218         return true;
 219     }
 220 }
 221
 222 /* returns the index of the track currently being played
 223    and updates the information about the current track. */
 224 int cue_find_current_track(struct cuesheet *cue, unsigned long curpos)
 225 {
 226     int i=0;
 227     while (i < cue->track_count-1 && cue->tracks[i+1].offset < curpos)
 228         i++;
 229
 230     cue->curr_track_idx = i;
 231     cue->curr_track = cue->tracks + i;
 232     return i;
 233 }
 234
 235 /* callback that gives list item titles for the cuesheet browser */
 236 static const char* list_get_name_cb(int selected_item,
 237                                     void *data,
 238                                     char *buffer,
 239                                     size_t buffer_len)
 240 {
 241     struct cuesheet *cue = (struct cuesheet *)data;
 242
 243     if (selected_item & 1)
 244         strlcpy(buffer, cue->tracks[selected_item/2].title, buffer_len);
 245     else
 246         snprintf(buffer, buffer_len, "%02d. %s", selected_item/2+1,
 247                  cue->tracks[selected_item/2].performer);
 248
 249     return buffer;
 250 }
 251
 252 void browse_cuesheet(struct cuesheet *cue)
 253 {
 254     struct gui_synclist lists;
 255     int action;
 256     bool done = false;
 257     int sel;
 258     char title[MAX_PATH];
 259     char cuepath[MAX_PATH];
 260     struct mp3entry *id3 = audio_current_track();
 261
 262     snprintf(title, MAX_PATH, "%s: %s", cue->performer, cue->title);
 263     gui_synclist_init(&lists, list_get_name_cb, cue, false, 2, NULL);
 264     gui_synclist_set_nb_items(&lists, 2*cue->track_count);
 265     gui_synclist_set_title(&lists, title, 0);
 266
 267
 268     if (id3)
 269     {
 270         gui_synclist_select_item(&lists,
 271                                  2*cue_find_current_track(cue, id3->elapsed));
 272     }
 273
 274     while (!done)
 275     {
 276         gui_synclist_draw(&lists);
 277         action = get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 278         if (gui_synclist_do_button(&lists, &action, LIST_WRAP_UNLESS_HELD))
 279             continue;
 280         switch (action)
 281         {
 282             case ACTION_STD_OK:
 283                 id3 = audio_current_track();
 284                 if (id3 && *id3->path && strcmp(id3->path, "No file!"))
 285                 {
 286                     look_for_cuesheet_file(id3->path, cuepath);
 287                     if (id3->cuesheet && !strcmp(cue->path, cuepath))
 288                     {
 289                         sel = gui_synclist_get_sel_pos(&lists);
 290                         seek(cue->tracks[sel/2].offset);
 291                     }
 292                 }
 293                 break;
 294             case ACTION_STD_CANCEL:
 295                 done = true;
 296         }
 297     }
 298 }
 299
 300 bool display_cuesheet_content(char* filename)
 301 {
 302     size_t bufsize = 0;
 303     struct cuesheet *cue = (struct cuesheet *)plugin_get_buffer(&bufsize);
 304     if (!cue || bufsize < sizeof(struct cuesheet))
 305         return false;
 306
 307     if (!parse_cuesheet(filename, cue))
 308         return false;
 309
 310     browse_cuesheet(cue);
 311     return true;
 312 }
 313
 314 /* skips backwards or forward in the current cuesheet
 315  * the return value indicates whether we're still in a cusheet after skipping
 316  * it also returns false if we weren't in a cuesheet.
 317  * direction should be 1 or -1.
 318  */
 319 bool curr_cuesheet_skip(struct cuesheet *cue, int direction, unsigned long curr_pos)
 320 {
 321     int track = cue_find_current_track(cue, curr_pos);
 322
 323     if (direction >= 0 && track == cue->track_count - 1)
 324     {
 325         /* we want to get out of the cuesheet */
 326         return false;
 327     }
 328     else
 329     {
 330         if (!(direction <= 0 && track == 0))
 331         {
 332             /* If skipping forward, skip to next cuesheet segment. If skipping
 333             backward before DEFAULT_SKIP_TRESH milliseconds have elapsed, skip
 334             to previous cuesheet segment. If skipping backward after
 335             DEFAULT_SKIP_TRESH seconds have elapsed, skip to the start of the
 336             current cuesheet segment */
 337             if (direction == 1 ||
 338                   ((curr_pos - cue->tracks[track].offset) < DEFAULT_SKIP_TRESH))
 339             {
 340                 track += direction;
 341             }
 342         }
 343
 344         seek(cue->tracks[track].offset);
 345         return true;
 346     }
 347
 348 }
 349
 350 #ifdef HAVE_LCD_BITMAP
 351 static inline void draw_veritcal_line_mark(struct screen * screen,
 352                                            int x, int y, int h)
 353 {
 354     screen->set_drawmode(DRMODE_COMPLEMENT);
 355     screen->vline(x, y, y+h-1);
 356 }
 357
 358 /* draw the cuesheet markers for a track of length "tracklen",
 359    between (x,y) and (x+w,y) */
 360 void cue_draw_markers(struct screen *screen, struct cuesheet *cue,
 361                       unsigned long tracklen,
 362                       int x, int y, int w, int h)
 363 {
 364     int i,xi;
 365     for (i=1; i < cue->track_count; i++)
 366     {
 367         xi = x + (w * cue->tracks[i].offset)/tracklen;
 368         draw_veritcal_line_mark(screen, xi, y, h);
 369     }
 370 }
 371 #endif
 372
 373 bool cuesheet_subtrack_changed(struct mp3entry *id3)
 374 {
 375     struct cuesheet *cue = id3->cuesheet;
 376     if (cue && (id3->elapsed < cue->curr_track->offset
 377             || (cue->curr_track_idx < cue->track_count - 1
 378                 && id3->elapsed >= (cue->curr_track+1)->offset)))
 379     {
 380         cue_find_current_track(cue, id3->elapsed);
 381         return true;
 382     }
 383     return false;
 384 }