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