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 "sprintf.h"
  32 #include "misc.h"
  33 #include "screens.h"
  34 #include "list.h"
  35 #include "action.h"
  36 #include "lang.h"
  37 #include "debug.h"
  38 #include "settings.h"
  39 #include "plugin.h"
  40 #include "playback.h"
  41 #include "cuesheet.h"
  42 #include "gui/wps.h"
  43
  44 #define CUE_DIR ROCKBOX_DIR "/cue"
  45
  46 bool look_for_cuesheet_file(const char *trackpath, char *found_cue_path)
  47 {
  48     /* DEBUGF("look for cue file\n"); */
  49
  50     char cuepath[MAX_PATH];
  51     char *dot, *slash;
  52
  53     slash = strrchr(trackpath, '/');
  54     if (!slash)
  55     {
  56         found_cue_path = NULL;
  57         return false;
  58     }
  59
  60     strlcpy(cuepath, trackpath, MAX_PATH);
  61     dot = strrchr(cuepath, '.');
  62     strcpy(dot, ".cue");
  63
  64     if (!file_exists(cuepath))
  65     {
  66         strcpy(cuepath, CUE_DIR);
  67         strcat(cuepath, slash);
  68         char *dot = strrchr(cuepath, '.');
  69         strcpy(dot, ".cue");
  70         if (!file_exists(cuepath))
  71         {
  72             if (found_cue_path)
  73                 found_cue_path = NULL;
  74             return false;
  75         }
  76     }
  77
  78     if (found_cue_path)
  79         strlcpy(found_cue_path, cuepath, MAX_PATH);
  80     return true;
  81 }
  82
  83 static char *get_string(const char *line)
  84 {
  85     char *start, *end;
  86
  87     start = strchr(line, '"');
  88     if (!start)
  89     {
  90         start = strchr(line, ' ');
  91
  92         if (!start)
  93             return NULL;
  94     }
  95
  96     end = strchr(++start, '"');
  97     if (end)
  98         *end = '\0';
  99
 100     return start;
 101 }
 102
 103 /* parse cuesheet "file" and store the information in "cue" */
 104 bool parse_cuesheet(char *file, struct cuesheet *cue)
 105 {
 106     char line[MAX_PATH];
 107     char *s;
 108     bool utf8 = false;
 109
 110     int fd = open_utf8(file,O_RDONLY);
 111     if (fd < 0)
 112     {
 113         /* couln't open the file */
 114         return false;
 115     }
 116     if(lseek(fd, 0, SEEK_CUR) > 0)
 117         utf8 = true;
 118
 119     /* Initialization */
 120     memset(cue, 0, sizeof(struct cuesheet));
 121     strcpy(cue->path, file);
 122     cue->curr_track = cue->tracks;
 123
 124     while ( read_line(fd,line,MAX_PATH) && cue->track_count < MAX_TRACKS )
 125     {
 126         s = skip_whitespace(line);
 127
 128         if (!strncmp(s, "TRACK", 5))
 129         {
 130             cue->track_count++;
 131         }
 132         else if (!strncmp(s, "INDEX 01", 8))
 133         {
 134             s = strchr(s,' ');
 135             s = skip_whitespace(s);
 136             s = strchr(s,' ');
 137             s = skip_whitespace(s);
 138             cue->tracks[cue->track_count-1].offset = 60*1000 * atoi(s);
 139             s = strchr(s,':') + 1;
 140             cue->tracks[cue->track_count-1].offset += 1000 * atoi(s);
 141             s = strchr(s,':') + 1;
 142             cue->tracks[cue->track_count-1].offset += 13 * atoi(s);
 143         }
 144         else if (!strncmp(s, "TITLE", 5)
 145                  || !strncmp(s, "PERFORMER", 9)
 146                  || !strncmp(s, "SONGWRITER", 10))
 147         {
 148             char *dest = NULL;
 149             char *string = get_string(s);
 150             if (!string)
 151                 break;
 152
 153             switch (*s)
 154             {
 155                 case 'T': /* TITLE */
 156                     dest = (cue->track_count <= 0) ? cue->title :
 157                             cue->tracks[cue->track_count-1].title;
 158                     break;
 159
 160                 case 'P': /* PERFORMER */
 161                     dest = (cue->track_count <= 0) ? cue->performer :
 162                         cue->tracks[cue->track_count-1].performer;
 163                     break;
 164
 165                 case 'S': /* SONGWRITER */
 166                     dest = (cue->track_count <= 0) ? cue->songwriter :
 167                             cue->tracks[cue->track_count-1].songwriter;
 168                     break;
 169             }
 170
 171             if (dest)
 172             {
 173                 if (!utf8)
 174                 {
 175                     dest = iso_decode(string, dest, -1, MIN(strlen(string), MAX_NAME));
 176                     *dest = '\0';
 177                 }
 178                 else
 179                 {
 180                     strlcpy(dest, string, MAX_NAME*3 + 1);
 181                 }
 182             }
 183         }
 184     }
 185     close(fd);
 186
 187     /* If some songs don't have performer info, we copy the cuesheet performer */
 188     int i;
 189     for (i = 0; i < cue->track_count; i++)
 190     {
 191         if (*(cue->tracks[i].performer) == '\0')
 192             strlcpy(cue->tracks[i].performer, cue->performer, MAX_NAME*3);
 193
 194         if (*(cue->tracks[i].songwriter) == '\0')
 195             strlcpy(cue->tracks[i].songwriter, cue->songwriter, MAX_NAME*3);
 196     }
 197
 198     return true;
 199 }
 200
 201 /* takes care of seeking to a track in a playlist
 202  * returns false if audio  isn't playing */
 203 static bool seek(unsigned long pos)
 204 {
 205     if (!(audio_status() & AUDIO_STATUS_PLAY))
 206     {
 207         return false;
 208     }
 209     else
 210     {
 211 #if (CONFIG_CODEC == SWCODEC)
 212         audio_pre_ff_rewind();
 213         audio_ff_rewind(pos);
 214 #else
 215         audio_pause();
 216         audio_ff_rewind(pos);
 217         audio_resume();
 218 #endif
 219         return true;
 220     }
 221 }
 222
 223 /* returns the index of the track currently being played
 224    and updates the information about the current track. */
 225 int cue_find_current_track(struct cuesheet *cue, unsigned long curpos)
 226 {
 227     int i=0;
 228     while (i < cue->track_count-1 && cue->tracks[i+1].offset < curpos)
 229         i++;
 230
 231     cue->curr_track_idx = i;
 232     cue->curr_track = cue->tracks + i;
 233     return i;
 234 }
 235
 236 /* callback that gives list item titles for the cuesheet browser */
 237 static const char* list_get_name_cb(int selected_item,
 238                                     void *data,
 239                                     char *buffer,
 240                                     size_t buffer_len)
 241 {
 242     struct cuesheet *cue = (struct cuesheet *)data;
 243
 244     if (selected_item & 1)
 245         strlcpy(buffer, cue->tracks[selected_item/2].title, buffer_len);
 246     else
 247         snprintf(buffer, buffer_len, "%02d. %s", selected_item/2+1,
 248                  cue->tracks[selected_item/2].performer);
 249
 250     return buffer;
 251 }
 252
 253 void browse_cuesheet(struct cuesheet *cue)
 254 {
 255     struct gui_synclist lists;
 256     int action;
 257     bool done = false;
 258     int sel;
 259     char title[MAX_PATH];
 260     char cuepath[MAX_PATH];
 261     struct mp3entry *id3 = audio_current_track();
 262
 263     snprintf(title, MAX_PATH, "%s: %s", cue->performer, cue->title);
 264     gui_synclist_init(&lists, list_get_name_cb, cue, false, 2, NULL);
 265     gui_synclist_set_nb_items(&lists, 2*cue->track_count);
 266     gui_synclist_set_title(&lists, title, 0);
 267
 268
 269     if (id3)
 270     {
 271         gui_synclist_select_item(&lists,
 272                                  2*cue_find_current_track(cue, id3->elapsed));
 273     }
 274
 275     while (!done)
 276     {
 277         gui_synclist_draw(&lists);
 278         action = get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 279         if (gui_synclist_do_button(&lists, &action, LIST_WRAP_UNLESS_HELD))
 280             continue;
 281         switch (action)
 282         {
 283             case ACTION_STD_OK:
 284                 id3 = audio_current_track();
 285                 if (id3 && *id3->path && strcmp(id3->path, "No file!"))
 286                 {
 287                     look_for_cuesheet_file(id3->path, cuepath);
 288                     if (id3->cuesheet && !strcmp(cue->path, cuepath))
 289                     {
 290                         sel = gui_synclist_get_sel_pos(&lists);
 291                         seek(cue->tracks[sel/2].offset);
 292                     }
 293                 }
 294                 break;
 295             case ACTION_STD_CANCEL:
 296                 done = true;
 297         }
 298     }
 299 }
 300
 301 bool display_cuesheet_content(char* filename)
 302 {
 303     size_t bufsize = 0;
 304     struct cuesheet *cue = (struct cuesheet *)plugin_get_buffer(&bufsize);
 305     if (!cue || bufsize < sizeof(struct cuesheet))
 306         return false;
 307
 308     if (!parse_cuesheet(filename, cue))
 309         return false;
 310
 311     browse_cuesheet(cue);
 312     return true;
 313 }
 314
 315 /* skips backwards or forward in the current cuesheet
 316  * the return value indicates whether we're still in a cusheet after skipping
 317  * it also returns false if we weren't in a cuesheet.
 318  * direction should be 1 or -1.
 319  */
 320 bool curr_cuesheet_skip(struct cuesheet *cue, int direction, unsigned long curr_pos)
 321 {
 322     int track = cue_find_current_track(cue, curr_pos);
 323
 324     if (direction >= 0 && track == cue->track_count - 1)
 325     {
 326         /* we want to get out of the cuesheet */
 327         return false;
 328     }
 329     else
 330     {
 331         if (!(direction <= 0 && track == 0))
 332         {
 333             /* If skipping forward, skip to next cuesheet segment. If skipping
 334             backward before DEFAULT_SKIP_TRESH milliseconds have elapsed, skip
 335             to previous cuesheet segment. If skipping backward after
 336             DEFAULT_SKIP_TRESH seconds have elapsed, skip to the start of the
 337             current cuesheet segment */
 338             if (direction == 1 ||
 339                   ((curr_pos - cue->tracks[track].offset) < DEFAULT_SKIP_TRESH))
 340             {
 341                 track += direction;
 342             }
 343         }
 344
 345         seek(cue->tracks[track].offset);
 346         return true;
 347     }
 348
 349 }
 350
 351 void cue_spoof_id3(struct cuesheet *cue, struct mp3entry *id3)
 352 {
 353     if (!cue || !cue->curr_track)
 354         return;
 355
 356     struct cue_track_info *track = cue->curr_track;
 357
 358     id3->title = *track->title ? track->title : NULL;
 359     id3->artist = *track->performer ? track->performer : NULL;
 360     id3->composer = *track->songwriter ? track->songwriter : NULL;
 361     id3->album = *cue->title ? cue->title : NULL;
 362
 363     /* if the album artist is the same as the track artist, we hide it. */
 364     if (strcmp(cue->performer, track->performer))
 365         id3->albumartist = *cue->performer ? cue->performer : NULL;
 366     else
 367         id3->albumartist = NULL;
 368
 369     int i = cue->curr_track_idx;
 370     id3->tracknum = i+1;
 371     if (id3->track_string)
 372         snprintf(id3->track_string, 10, "%d/%d", i+1, cue->track_count);
 373 }
 374
 375 #ifdef HAVE_LCD_BITMAP
 376 static inline void draw_veritcal_line_mark(struct screen * screen,
 377                                            int x, int y, int h)
 378 {
 379     screen->set_drawmode(DRMODE_COMPLEMENT);
 380     screen->vline(x, y, y+h-1);
 381 }
 382
 383 /* draw the cuesheet markers for a track of length "tracklen",
 384    between (x1,y) and (x2,y) */
 385 void cue_draw_markers(struct screen *screen, struct cuesheet *cue,
 386                       unsigned long tracklen,
 387                       int x1, int x2, int y, int h)
 388 {
 389     int i,xi;
 390     int w = x2 - x1;
 391     for (i=1; i < cue->track_count; i++)
 392     {
 393         xi = x1 + (w * cue->tracks[i].offset)/tracklen;
 394         draw_veritcal_line_mark(screen, xi, y, h);
 395     }
 396 }
 397 #endif
 398
 399 bool cuesheet_subtrack_changed(struct mp3entry *id3)
 400 {
 401     struct cuesheet *cue = id3->cuesheet;
 402     if (cue && (id3->elapsed < cue->curr_track->offset
 403             || (cue->curr_track_idx < cue->track_count - 1
 404                 && id3->elapsed >= (cue->curr_track+1)->offset)))
 405     {
 406         cue_find_current_track(cue, id3->elapsed);
 407         cue_spoof_id3(cue, id3);
 408         return true;
 409     }
 410     return false;
 411 }