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 "buffer.h"
  40 #include "plugin.h"
  41 #include "playback.h"
  42 #include "cuesheet.h"
  43
  44 #define CUE_DIR ROCKBOX_DIR "/cue"
  45
  46 struct cuesheet *curr_cue;
  47
  48 #if CONFIG_CODEC != SWCODEC
  49 /* special trickery because the hwcodec playback engine is in firmware/ */
  50 static bool cuesheet_handler(const char *filename)
  51 {
  52     return cuesheet_is_enabled() && look_for_cuesheet_file(filename, NULL);
  53 }
  54 #endif
  55
  56 void cuesheet_init(void)
  57 {
  58     if (global_settings.cuesheet) {
  59         curr_cue = (struct cuesheet *)buffer_alloc(sizeof(struct cuesheet));
  60 #if CONFIG_CODEC != SWCODEC
  61         audio_set_cuesheet_callback(cuesheet_handler);
  62 #endif
  63     } else {
  64         curr_cue = NULL;
  65     }
  66 }
  67
  68 bool cuesheet_is_enabled(void)
  69 {
  70     return (curr_cue != NULL);
  71 }
  72
  73 bool look_for_cuesheet_file(const char *trackpath, char *found_cue_path)
  74 {
  75     /* DEBUGF("look for cue file\n"); */
  76
  77     char cuepath[MAX_PATH];
  78     char *dot, *slash;
  79
  80     slash = strrchr(trackpath, '/');
  81     if (!slash)
  82     {
  83         found_cue_path = NULL;
  84         return false;
  85     }
  86
  87     strncpy(cuepath, trackpath, MAX_PATH);
  88     dot = strrchr(cuepath, '.');
  89     strcpy(dot, ".cue");
  90
  91     if (!file_exists(cuepath))
  92     {
  93         strcpy(cuepath, CUE_DIR);
  94         strcat(cuepath, slash);
  95         char *dot = strrchr(cuepath, '.');
  96         strcpy(dot, ".cue");
  97         if (!file_exists(cuepath))
  98         {
  99             if (found_cue_path)
 100                 found_cue_path = NULL;
 101             return false;
 102         }
 103     }
 104
 105     if (found_cue_path)
 106         strncpy(found_cue_path, cuepath, MAX_PATH);
 107     return true;
 108 }
 109
 110 static char *get_string(const char *line)
 111 {
 112     char *start, *end;
 113
 114     start = strchr(line, '"');
 115     if (!start)
 116     {
 117         start = strchr(line, ' ');
 118
 119         if (!start)
 120             return NULL;
 121     }
 122
 123     end = strchr(++start, '"');
 124     if (end)
 125         *end = '\0';
 126
 127     return start;
 128 }
 129
 130 /* parse cuesheet "file" and store the information in "cue" */
 131 bool parse_cuesheet(char *file, struct cuesheet *cue)
 132 {
 133     char line[MAX_PATH];
 134     char *s;
 135     bool utf8 = false;
 136
 137     DEBUGF("cue parse\n");
 138     int fd = open_utf8(file,O_RDONLY);
 139     if (fd < 0)
 140     {
 141         /* couln't open the file */
 142         return false;
 143     }
 144     if(lseek(fd, 0, SEEK_CUR) > 0)
 145         utf8 = true;
 146
 147     /* Initialization */
 148     memset(cue, 0, sizeof(struct cuesheet));
 149     strcpy(cue->path, file);
 150     cue->curr_track = cue->tracks;
 151
 152     while ( read_line(fd,line,MAX_PATH) && cue->track_count < MAX_TRACKS )
 153     {
 154         s = skip_whitespace(line);
 155
 156         if (!strncmp(s, "TRACK", 5))
 157         {
 158             cue->track_count++;
 159         }
 160         else if (!strncmp(s, "INDEX 01", 8))
 161         {
 162             s = strchr(s,' ');
 163             s = skip_whitespace(s);
 164             s = strchr(s,' ');
 165             s = skip_whitespace(s);
 166             cue->tracks[cue->track_count-1].offset = 60*1000 * atoi(s);
 167             s = strchr(s,':') + 1;
 168             cue->tracks[cue->track_count-1].offset += 1000 * atoi(s);
 169             s = strchr(s,':') + 1;
 170             cue->tracks[cue->track_count-1].offset += 13 * atoi(s);
 171         }
 172         else if (!strncmp(s, "TITLE", 5)
 173                  || !strncmp(s, "PERFORMER", 9)
 174                  || !strncmp(s, "SONGWRITER", 10))
 175         {
 176             char *dest = NULL;
 177             char *string = get_string(s);
 178             if (!string)
 179                 break;
 180
 181             switch (*s)
 182             {
 183                 case 'T': /* TITLE */
 184                     dest = (cue->track_count <= 0) ? cue->title :
 185                             cue->tracks[cue->track_count-1].title;
 186                     break;
 187
 188                 case 'P': /* PERFORMER */
 189                     dest = (cue->track_count <= 0) ? cue->performer :
 190                         cue->tracks[cue->track_count-1].performer;
 191                     break;
 192
 193                 case 'S': /* SONGWRITER */
 194                     dest = (cue->track_count <= 0) ? cue->songwriter :
 195                             cue->tracks[cue->track_count-1].songwriter;
 196                     break;
 197             }
 198
 199             if (dest)
 200             {
 201                 if (!utf8)
 202                 {
 203                     dest = iso_decode(string, dest, -1, MIN(strlen(string), MAX_NAME));
 204                     *dest = '\0';
 205                 }
 206                 else
 207                 {
 208                     strncpy(dest, string, MAX_NAME*3);
 209                     dest[MAX_NAME*3] = '\0';
 210                 }
 211             }
 212         }
 213     }
 214     close(fd);
 215
 216     /* If some songs don't have performer info, we copy the cuesheet performer */
 217     int i;
 218     for (i = 0; i < cue->track_count; i++)
 219     {
 220         if (*(cue->tracks[i].performer) == '\0')
 221             strncpy(cue->tracks[i].performer, cue->performer, MAX_NAME*3);
 222
 223         if (*(cue->tracks[i].songwriter) == '\0')
 224             strncpy(cue->tracks[i].songwriter, cue->songwriter, MAX_NAME*3);
 225     }
 226
 227     return true;
 228 }
 229
 230 /* takes care of seeking to a track in a playlist
 231  * returns false if audio  isn't playing */
 232 static bool seek(unsigned long pos)
 233 {
 234     if (!(audio_status() & AUDIO_STATUS_PLAY))
 235     {
 236         return false;
 237     }
 238     else
 239     {
 240 #if (CONFIG_CODEC == SWCODEC)
 241         audio_pre_ff_rewind();
 242         audio_ff_rewind(pos);
 243 #else
 244         audio_pause();
 245         audio_ff_rewind(pos);
 246         audio_resume();
 247 #endif
 248         return true;
 249     }
 250 }
 251
 252 /* returns the index of the track currently being played
 253    and updates the information about the current track. */
 254 int cue_find_current_track(struct cuesheet *cue, unsigned long curpos)
 255 {
 256     int i=0;
 257     while (i < cue->track_count-1 && cue->tracks[i+1].offset < curpos)
 258         i++;
 259
 260     cue->curr_track_idx = i;
 261     cue->curr_track = cue->tracks + i;
 262     return i;
 263 }
 264
 265 /* callback that gives list item titles for the cuesheet browser */
 266 static char *list_get_name_cb(int selected_item,
 267                               void *data,
 268                               char *buffer,
 269                               size_t buffer_len)
 270 {
 271     struct cuesheet *cue = (struct cuesheet *)data;
 272
 273     if (selected_item & 1)
 274         strncpy(buffer, cue->tracks[selected_item/2].title, buffer_len);
 275     else
 276         snprintf(buffer, buffer_len, "%02d. %s", selected_item/2+1,
 277                  cue->tracks[selected_item/2].performer);
 278
 279     return buffer;
 280 }
 281
 282 void browse_cuesheet(struct cuesheet *cue)
 283 {
 284     struct gui_synclist lists;
 285     int action;
 286     bool done = false;
 287     int sel;
 288     char title[MAX_PATH];
 289     char cuepath[MAX_PATH];
 290     struct mp3entry *id3 = audio_current_track();
 291
 292     snprintf(title, MAX_PATH, "%s: %s", cue->performer, cue->title);
 293     gui_synclist_init(&lists, list_get_name_cb, cue, false, 2, NULL);
 294     gui_synclist_set_nb_items(&lists, 2*cue->track_count);
 295     gui_synclist_set_title(&lists, title, 0);
 296
 297     if (id3 && *id3->path && strcmp(id3->path, "No file!"))
 298     {
 299         look_for_cuesheet_file(id3->path, cuepath);
 300     }
 301
 302     if (id3 && id3->cuesheet_type && !strcmp(cue->path, cuepath))
 303     {
 304         gui_synclist_select_item(&lists,
 305                                  2*cue_find_current_track(cue, id3->elapsed));
 306     }
 307
 308     while (!done)
 309     {
 310         gui_synclist_draw(&lists);
 311         action = get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 312         if (gui_synclist_do_button(&lists, &action, LIST_WRAP_UNLESS_HELD))
 313             continue;
 314         switch (action)
 315         {
 316             case ACTION_STD_OK:
 317                 id3 = audio_current_track();
 318                 if (id3 && *id3->path && strcmp(id3->path, "No file!"))
 319                 {
 320                     look_for_cuesheet_file(id3->path, cuepath);
 321                     if (id3->cuesheet_type && !strcmp(cue->path, cuepath))
 322                     {
 323                         sel = gui_synclist_get_sel_pos(&lists);
 324                         seek(cue->tracks[sel/2].offset);
 325                     }
 326                 }
 327                 break;
 328             case ACTION_STD_CANCEL:
 329                 done = true;
 330         }
 331     }
 332 }
 333
 334 bool display_cuesheet_content(char* filename)
 335 {
 336     size_t bufsize = 0;
 337     struct cuesheet *cue = (struct cuesheet *)plugin_get_buffer(&bufsize);
 338     if (!cue || bufsize < sizeof(struct cuesheet))
 339         return false;
 340
 341     if (!parse_cuesheet(filename, cue))
 342         return false;
 343
 344     browse_cuesheet(cue);
 345     return true;
 346 }
 347
 348 /* skips backwards or forward in the current cuesheet
 349  * the return value indicates whether we're still in a cusheet after skipping
 350  * it also returns false if we weren't in a cuesheet.
 351  * direction should be 1 or -1.
 352  */
 353 bool curr_cuesheet_skip(int direction, unsigned long curr_pos)
 354 {
 355     int track = cue_find_current_track(curr_cue, curr_pos);
 356
 357     if (direction >= 0 && track == curr_cue->track_count - 1)
 358     {
 359         /* we want to get out of the cuesheet */
 360         return false;
 361     }
 362     else
 363     {
 364         if (!(direction <= 0 && track == 0))
 365             track += direction;
 366
 367         seek(curr_cue->tracks[track].offset);
 368         return true;
 369     }
 370
 371 }
 372
 373 void cue_spoof_id3(struct cuesheet *cue, struct mp3entry *id3)
 374 {
 375     if (!cue || !cue->curr_track)
 376         return;
 377
 378     struct cue_track_info *track = cue->curr_track;
 379
 380     id3->title = *track->title ? track->title : NULL;
 381     id3->artist = *track->performer ? track->performer : NULL;
 382     id3->composer = *track->songwriter ? track->songwriter : NULL;
 383     id3->album = *cue->title ? cue->title : NULL;
 384
 385     /* if the album artist is the same as the track artist, we hide it. */
 386     if (strcmp(cue->performer, track->performer))
 387         id3->albumartist = *cue->performer ? cue->performer : NULL;
 388     else
 389         id3->albumartist = NULL;
 390
 391     int i = cue->curr_track_idx;
 392     id3->tracknum = i+1;
 393     if (id3->track_string)
 394         snprintf(id3->track_string, 10, "%d/%d", i+1, cue->track_count);
 395 }
 396
 397 #ifdef HAVE_LCD_BITMAP
 398 static inline void draw_veritcal_line_mark(struct screen * screen,
 399                                            int x, int y, int h)
 400 {
 401     screen->set_drawmode(DRMODE_COMPLEMENT);
 402     screen->vline(x, y, y+h-1);
 403 }
 404
 405 /* draw the cuesheet markers for a track of length "tracklen",
 406    between (x1,y) and (x2,y) */
 407 void cue_draw_markers(struct screen *screen, unsigned long tracklen,
 408                       int x1, int x2, int y, int h)
 409 {
 410     int i,xi;
 411     int w = x2 - x1;
 412     for (i=1; i < curr_cue->track_count; i++)
 413     {
 414         xi = x1 + (w * curr_cue->tracks[i].offset)/tracklen;
 415         draw_veritcal_line_mark(screen, xi, y, h);
 416     }
 417 }
 418 #endif