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  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <stdbool.h>
  23 #include <atoi.h>
  24 #include <ctype.h>
  25 #include <string.h>
  26 #include "system.h"
  27 #include "audio.h"
  28 #include "kernel.h"
  29 #include "logf.h"
  30 #include "sprintf.h"
  31 #include "misc.h"
  32 #include "screens.h"
  33 #include "splash.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 struct cuesheet *temp_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         temp_cue = (struct cuesheet *)buffer_alloc(sizeof(struct cuesheet));
  62 #if CONFIG_CODEC != SWCODEC
  63         audio_set_cuesheet_callback(cuesheet_handler);
  64 #endif
  65     } else {
  66         curr_cue = NULL;
  67         temp_cue = NULL;
  68     }
  69 }
  70
  71 bool cuesheet_is_enabled(void)
  72 {
  73     return (curr_cue != NULL);
  74 }
  75
  76 bool look_for_cuesheet_file(const char *trackpath, char *found_cue_path)
  77 {
  78     DEBUGF("look for cue file\n");
  79     char cuepath[MAX_PATH];
  80     strncpy(cuepath, trackpath, MAX_PATH);
  81     char *dot = strrchr(cuepath, '.');
  82     strcpy(dot, ".cue");
  83
  84     int fd = open(cuepath,O_RDONLY);
  85     if (fd < 0)
  86     {
  87         strcpy(cuepath, CUE_DIR);
  88         strcat(cuepath, strrchr(trackpath, '/'));
  89         char *dot = strrchr(cuepath, '.');
  90         strcpy(dot, ".cue");
  91         fd = open(cuepath,O_RDONLY);
  92         if (fd < 0)
  93         {
  94             if (found_cue_path)
  95                 found_cue_path = NULL;
  96             return false;
  97         }
  98     }
  99     close(fd);
 100     if (found_cue_path)
 101         strncpy(found_cue_path, cuepath, MAX_PATH);
 102     return true;
 103 }
 104
 105 static char *skip_whitespace(char* buf)
 106 {
 107     char *r = buf;
 108     while (*r && isspace(*r))
 109         r++;
 110     return r;
 111 }
 112
 113
 114 static char *get_string(const char *line)
 115 {
 116     char *start, *end;
 117
 118     start = strchr(line, '"');
 119     if (!start)
 120     {
 121         start = strchr(line, ' ');
 122
 123         if (!start)
 124             return NULL;
 125     }
 126
 127     end = strchr(++start, '"');
 128     if (end)
 129         *end = '\0';
 130
 131     return start;
 132 }
 133
 134 /* parse cuesheet "file" and store the information in "cue" */
 135 bool parse_cuesheet(char *file, struct cuesheet *cue)
 136 {
 137     char line[MAX_PATH];
 138     char *s;
 139
 140     DEBUGF("cue parse\n");
 141     int fd = open(file,O_RDONLY);
 142     if (fd < 0)
 143     {
 144         /* couln't open the file */
 145         return false;
 146     }
 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                 dest = iso_decode(string, dest, -1, MIN(strlen(string), MAX_NAME));
 202                 *dest = '\0';
 203             }
 204         }
 205     }
 206     close(fd);
 207
 208     /* If some songs don't have performer info, we copy the cuesheet performer */
 209     int i;
 210     for (i = 0; i < cue->track_count; i++)
 211     {
 212         if (*(cue->tracks[i].performer) == '\0')
 213             strncpy(cue->tracks[i].performer, cue->performer, MAX_NAME);
 214
 215         if (*(cue->tracks[i].songwriter) == '\0')
 216             strncpy(cue->tracks[i].songwriter, cue->songwriter, MAX_NAME);
 217     }
 218
 219     return true;
 220 }
 221
 222 /* takes care of seeking to a track in a playlist
 223  * returns false if audio  isn't playing */
 224 static bool seek(unsigned long pos)
 225 {
 226     if (!(audio_status() & AUDIO_STATUS_PLAY))
 227     {
 228         return false;
 229     }
 230     else
 231     {
 232 #if (CONFIG_CODEC == SWCODEC)
 233         audio_pre_ff_rewind();
 234         audio_ff_rewind(pos);
 235 #else
 236         audio_pause();
 237         audio_ff_rewind(pos);
 238         audio_resume();
 239 #endif
 240         return true;
 241     }
 242 }
 243
 244 /* returns the index of the track currently being played
 245    and updates the information about the current track. */
 246 int cue_find_current_track(struct cuesheet *cue, unsigned long curpos)
 247 {
 248     int i=0;
 249     while (i < cue->track_count-1 && cue->tracks[i+1].offset < curpos)
 250         i++;
 251
 252     cue->curr_track_idx = i;
 253     cue->curr_track = cue->tracks + i;
 254     return i;
 255 }
 256
 257 /* callback that gives list item titles for the cuesheet browser */
 258 static char *list_get_name_cb(int selected_item,
 259                              void *data,
 260                              char *buffer)
 261 {
 262     struct cuesheet *cue = (struct cuesheet *)data;
 263
 264     if (selected_item & 1)
 265         snprintf(buffer, MAX_PATH, "%s",
 266                  cue->tracks[selected_item/2].title);
 267     else
 268         snprintf(buffer, MAX_PATH, "%02d. %s", selected_item/2+1,
 269                  cue->tracks[selected_item/2].performer);
 270
 271     return buffer;
 272 }
 273
 274 void browse_cuesheet(struct cuesheet *cue)
 275 {
 276     struct gui_synclist lists;
 277     int action;
 278     bool done = false;
 279     int sel;
 280     char title[MAX_PATH];
 281     char cuepath[MAX_PATH];
 282     struct mp3entry *id3 = audio_current_track();
 283
 284     snprintf(title, MAX_PATH, "%s: %s", cue->performer, cue->title);
 285     gui_synclist_init(&lists, list_get_name_cb, cue, false, 2);
 286     gui_synclist_set_nb_items(&lists, 2*cue->track_count);
 287     gui_synclist_set_title(&lists, title, 0);
 288
 289     if (id3 && *id3->path && strcmp(id3->path, "No file!"))
 290     {
 291         look_for_cuesheet_file(id3->path, cuepath);
 292     }
 293
 294     if (id3 && id3->cuesheet_type && !strcmp(cue->path, cuepath))
 295     {
 296         gui_synclist_select_item(&lists,
 297                                  2*cue_find_current_track(cue, id3->elapsed));
 298     }
 299
 300     while (!done)
 301     {
 302         gui_synclist_draw(&lists);
 303         action = get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 304         if (gui_synclist_do_button(&lists, &action, LIST_WRAP_UNLESS_HELD))
 305             continue;
 306         switch (action)
 307         {
 308             case ACTION_STD_OK:
 309                 id3 = audio_current_track();
 310                 if (id3 && *id3->path && strcmp(id3->path, "No file!"))
 311                 {
 312                     look_for_cuesheet_file(id3->path, cuepath);
 313                     if (id3->cuesheet_type && !strcmp(cue->path, cuepath))
 314                     {
 315                         sel = gui_synclist_get_sel_pos(&lists);
 316                         seek(cue->tracks[sel/2].offset);
 317                     }
 318                 }
 319                 break;
 320             case ACTION_STD_CANCEL:
 321                 done = true;
 322         }
 323     }
 324 }
 325
 326 bool display_cuesheet_content(char* filename)
 327 {
 328     size_t bufsize = 0;
 329     struct cuesheet *cue = (struct cuesheet *)plugin_get_buffer(&bufsize);
 330     if (!cue || bufsize < sizeof(struct cuesheet))
 331         return false;
 332
 333     if (!parse_cuesheet(filename, cue))
 334         return false;
 335
 336     browse_cuesheet(cue);
 337     return true;
 338 }
 339
 340 /* skips backwards or forward in the current cuesheet
 341  * the return value indicates whether we're still in a cusheet after skipping
 342  * it also returns false if we weren't in a cuesheet.
 343  * direction should be 1 or -1.
 344  */
 345 bool curr_cuesheet_skip(int direction, unsigned long curr_pos)
 346 {
 347     int track = cue_find_current_track(curr_cue, curr_pos);
 348
 349     if (direction >= 0 && track == curr_cue->track_count - 1)
 350     {
 351         /* we want to get out of the cuesheet */
 352         return false;
 353     }
 354     else
 355     {
 356         if (!(direction <= 0 && track == 0))
 357             track += direction;
 358
 359         seek(curr_cue->tracks[track].offset);
 360         return true;
 361     }
 362
 363 }
 364
 365 void cue_spoof_id3(struct cuesheet *cue, struct mp3entry *id3)
 366 {
 367     if (!cue || !cue->curr_track)
 368         return;
 369
 370     struct cue_track_info *track = cue->curr_track;
 371
 372     id3->title = *track->title ? track->title : NULL;
 373     id3->artist = *track->performer ? track->performer : NULL;
 374     id3->composer = *track->songwriter ? track->songwriter : NULL;
 375     id3->album = *cue->title ? cue->title : NULL;
 376
 377     /* if the album artist is the same as the track artist, we hide it. */
 378     if (strcmp(cue->performer, track->performer))
 379         id3->albumartist = *cue->performer ? cue->performer : NULL;
 380     else
 381         id3->albumartist = NULL;
 382
 383     int i = cue->curr_track_idx;
 384     id3->tracknum = i+1;
 385     if (id3->track_string)
 386         snprintf(id3->track_string, 10, "%d/%d", i+1, cue->track_count);
 387 }
 388
 389 #ifdef HAVE_LCD_BITMAP
 390 static inline void draw_veritcal_line_mark(struct screen * screen,
 391                                            int x, int y, int h)
 392 {
 393     screen->set_drawmode(DRMODE_COMPLEMENT);
 394     screen->vline(x, y, y+h-1);
 395 }
 396
 397 /* draw the cuesheet markers for a track of length "tracklen",
 398    between (x1,y) and (x2,y) */
 399 void cue_draw_markers(struct screen *screen, unsigned long tracklen,
 400                       int x1, int x2, int y, int h)
 401 {
 402     int i,xi;
 403     int w = x2 - x1;
 404     for (i=1; i < curr_cue->track_count; i++)
 405     {
 406         xi = x1 + (w * curr_cue->tracks[i].offset)/tracklen;
 407         draw_veritcal_line_mark(screen, xi, y, h);
 408     }
 409 }
 410 #endif