apps/cuesheet.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $$
   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 <string.h>
  25 #include "system.h"
  26 #include "audio.h"
  27 #include "kernel.h"
  28 #include "logf.h"
  29 #include "sprintf.h"
  30 #include "misc.h"
  31 #include "screens.h"
  32 #include "splash.h"
  33 #include "list.h"
  34 #include "action.h"
  35 #include "lang.h"
  36 #include "debug.h"
  37 #include "settings.h"
  38 #include "buffer.h"
  39 #include "plugin.h"
  40 #include "playback.h"
  41 #include "cuesheet.h"
  42
  43 #if CONFIG_CODEC != SWCODEC
  44 /* special trickery because the hwcodec playback engine is in firmware/ */
  45 static bool cuesheet_handler(const char *filename)
  46 {
  47     return cuesheet_is_enabled() && look_for_cuesheet_file(filename);
  48 }
  49 #endif
  50
  51 void cuesheet_init(void)
  52 {
  53     if (global_settings.cuesheet) {
  54         curr_cue = (struct cuesheet *)buffer_alloc(sizeof(struct cuesheet));
  55         temp_cue = (struct cuesheet *)buffer_alloc(sizeof(struct cuesheet));
  56 #if CONFIG_CODEC != SWCODEC
  57         audio_set_cuesheet_callback(cuesheet_handler);
  58 #endif
  59     } else {
  60         curr_cue = NULL;
  61         temp_cue = NULL;
  62     }
  63 }
  64
  65 bool cuesheet_is_enabled(void)
  66 {
  67     return (curr_cue != NULL);
  68 }
  69
  70 bool look_for_cuesheet_file(const char *trackpath)
  71 {
  72     char cuepath[MAX_PATH];
  73     strncpy(cuepath, trackpath, MAX_PATH);
  74     char *dot = strrchr(cuepath, '.');
  75     strcpy(dot, ".cue");
  76
  77     int fd = open(cuepath,O_RDONLY);
  78     if (fd < 0)
  79     {
  80         return false;
  81     }
  82     else
  83     {
  84         close(fd);
  85         return true;
  86     }
  87 }
  88
  89 static char *skip_whitespace(char* buf)
  90 {
  91     char *r = buf;
  92     while (*r && isspace(*r))
  93         r++;
  94     return r;
  95 }
  96
  97
  98 static char *get_string(const char *line)
  99 {
 100     char *start, *end;
 101
 102     start = strchr(line, '"');
 103     if (!start)
 104     {
 105         start = strchr(line, ' ');
 106
 107         if (!start)
 108             return NULL;
 109     }
 110
 111     end = strchr(++start, '"');
 112     if (end)
 113         *end = '\0';
 114
 115     return start;
 116 }
 117
 118 /* parse cuesheet "file" and store the information in "cue" */
 119 bool parse_cuesheet(char *file, struct cuesheet *cue)
 120 {
 121     char line[MAX_PATH];
 122     char *s;
 123
 124     int fd = open(file,O_RDONLY);
 125     if (fd < 0)
 126     {
 127         /* couln't open the file */
 128         return false;
 129     }
 130
 131     /* Initialization */
 132     memset(cue, 0, sizeof(struct cuesheet));
 133     strcpy(cue->path, file);
 134     cue->curr_track = cue->tracks;
 135
 136     while ( read_line(fd,line,MAX_PATH) && cue->track_count < MAX_TRACKS )
 137     {
 138         s = skip_whitespace(line);
 139
 140         if (!strncmp(s, "TRACK", 5))
 141         {
 142             cue->track_count++;
 143         }
 144         else if (!strncmp(s, "INDEX 01", 8))
 145         {
 146             s = strchr(s,' ');
 147             s = skip_whitespace(s);
 148             s = strchr(s,' ');
 149             s = skip_whitespace(s);
 150             cue->tracks[cue->track_count-1].offset = 60*1000 * atoi(s);
 151             s = strchr(s,':') + 1;
 152             cue->tracks[cue->track_count-1].offset += 1000 * atoi(s);
 153             s = strchr(s,':') + 1;
 154             cue->tracks[cue->track_count-1].offset += 13 * atoi(s);
 155         }
 156         else if (!strncmp(s, "TITLE", 5)
 157                  || !strncmp(s, "PERFORMER", 9)
 158                  || !strncmp(s, "SONGWRITER", 10))
 159         {
 160             char *dest = NULL;
 161             char *string = get_string(s);
 162             if (!string)
 163                 break;
 164
 165             switch (*s)
 166             {
 167                 case 'T': /* TITLE */
 168                     dest = (cue->track_count <= 0) ? cue->title :
 169                             cue->tracks[cue->track_count-1].title;
 170                     break;
 171
 172                 case 'P': /* PERFORMER */
 173                     dest = (cue->track_count <= 0) ? cue->performer :
 174                         cue->tracks[cue->track_count-1].performer;
 175                     break;
 176
 177                 case 'S': /* SONGWRITER */
 178                     dest = (cue->track_count <= 0) ? cue->songwriter :
 179                             cue->tracks[cue->track_count-1].songwriter;
 180                     break;
 181             }
 182
 183             if (dest)
 184                 strncpy(dest, string, MAX_NAME);
 185         }
 186     }
 187     close(fd);
 188
 189     /* If some songs don't have performer info, we copy the cuesheet performer */
 190     int i;
 191     for (i = 0; i < cue->track_count; i++)
 192     {
 193         if (*(cue->tracks[i].performer) == '\0')
 194             strncpy(cue->tracks[i].performer, cue->performer, MAX_NAME);
 195
 196         if (*(cue->tracks[i].songwriter) == '\0')
 197             strncpy(cue->tracks[i].songwriter, cue->songwriter, MAX_NAME);
 198     }
 199
 200     return true;
 201 }
 202
 203 /* takes care of seeking to a track in a playlist
 204  * returns false if audio  isn't playing */
 205 static bool seek(unsigned long pos)
 206 {
 207     if (!(audio_status() & AUDIO_STATUS_PLAY))
 208     {
 209         return false;
 210     }
 211     else
 212     {
 213 #if (CONFIG_CODEC == SWCODEC)
 214         audio_pre_ff_rewind();
 215         audio_ff_rewind(pos);
 216 #else
 217         audio_pause();
 218         audio_ff_rewind(pos);
 219         audio_resume();
 220 #endif
 221         return true;
 222     }
 223 }
 224
 225 /* returns the index of the track currently being played
 226    and updates the information about the current track. */
 227 int cue_find_current_track(struct cuesheet *cue, unsigned long curpos)
 228 {
 229     int i=0;
 230     while (i < cue->track_count-1 && cue->tracks[i+1].offset < curpos)
 231         i++;
 232
 233     cue->curr_track_idx = i;
 234     cue->curr_track = cue->tracks + i;
 235     return i;
 236 }
 237
 238 /* callback that gives list item titles for the cuesheet browser */
 239 static char *list_get_name_cb(int selected_item,
 240                              void *data,
 241                              char *buffer)
 242 {
 243     struct cuesheet *cue = (struct cuesheet *)data;
 244
 245     if (selected_item & 1)
 246         snprintf(buffer, MAX_PATH, "%s",
 247                  cue->tracks[selected_item/2].title);
 248     else
 249         snprintf(buffer, MAX_PATH, "%02d. %s", selected_item/2+1,
 250                  cue->tracks[selected_item/2].performer);
 251
 252     return buffer;
 253 }
 254
 255 static void browse_cuesheet(struct cuesheet *cue)
 256 {
 257     struct gui_synclist lists;
 258     int action;
 259     bool done = false;
 260     int sel;
 261     char title[MAX_PATH];
 262     char cuepath[MAX_PATH];
 263     char *dot;
 264     struct mp3entry *id3 = audio_current_track();
 265
 266     snprintf(title, MAX_PATH, "%s: %s", cue->performer, cue->title);
 267     gui_synclist_init(&lists, list_get_name_cb, cue, false, 2);
 268     gui_synclist_set_nb_items(&lists, 2*cue->track_count);
 269     gui_synclist_set_title(&lists, title, 0);
 270
 271     if (id3 && *id3->path && strcmp(id3->path, "No file!"))
 272     {
 273         strncpy(cuepath, id3->path, MAX_PATH);
 274         dot = strrchr(cuepath, '.');
 275         strcpy(dot, ".cue");
 276     }
 277
 278     if (id3 && id3->cuesheet_type && !strcmp(cue->path, cuepath))
 279     {
 280         gui_synclist_select_item(&lists,
 281                                  2*cue_find_current_track(cue, id3->elapsed));
 282     }
 283
 284     while (!done)
 285     {
 286         gui_synclist_draw(&lists);
 287         action = get_action(CONTEXT_LIST,TIMEOUT_BLOCK);
 288         if (gui_synclist_do_button(&lists,action,LIST_WRAP_UNLESS_HELD))
 289             continue;
 290         switch (action)
 291         {
 292             case ACTION_STD_OK:
 293                 id3 = audio_current_track();
 294                 if (id3 && *id3->path && strcmp(id3->path, "No file!"))
 295                 {
 296                     strncpy(cuepath, id3->path, MAX_PATH);
 297                     dot = strrchr(cuepath, '.');
 298                     strcpy(dot, ".cue");
 299                     if (id3->cuesheet_type && !strcmp(cue->path, cuepath))
 300                     {
 301                         sel = gui_synclist_get_sel_pos(&lists);
 302                         seek(cue->tracks[sel/2].offset);
 303                     }
 304                 }
 305                 break;
 306             case ACTION_STD_CANCEL:
 307                 done = true;
 308         }
 309     }
 310     action_signalscreenchange();
 311 }
 312
 313 bool display_cuesheet_content(char* filename)
 314 {
 315     unsigned int bufsize = 0;
 316     struct cuesheet *cue = (struct cuesheet *)plugin_get_buffer(&bufsize);
 317     if (!cue || bufsize < sizeof(struct cuesheet))
 318         return false;
 319
 320     if (!parse_cuesheet(filename, cue))
 321         return false;
 322
 323     browse_cuesheet(cue);
 324     return true;
 325 }
 326
 327 /* skips backwards or forward in the current cuesheet
 328  * the return value indicates whether we're still in a cusheet after skipping
 329  * it also returns false if we weren't in a cuesheet.
 330  * direction should be 1 or -1.
 331  */
 332 bool curr_cuesheet_skip(int direction, unsigned long curr_pos)
 333 {
 334     int track = cue_find_current_track(curr_cue, curr_pos);
 335
 336     if (direction >= 0 && track == curr_cue->track_count - 1)
 337     {
 338         /* we want to get out of the cuesheet */
 339         return false;
 340     }
 341     else
 342     {
 343         if (!(direction <= 0 && track == 0))
 344             track += direction;
 345
 346         seek(curr_cue->tracks[track].offset);
 347         return true;
 348     }
 349
 350 }
 351
 352 void cue_spoof_id3(struct cuesheet *cue, struct mp3entry *id3)
 353 {
 354     if (!cue || !cue->curr_track)
 355         return;
 356
 357     struct cue_track_info *track = cue->curr_track;
 358
 359     id3->title = *track->title ? track->title : NULL;
 360     id3->artist = *track->performer ? track->performer : NULL;
 361     id3->composer = *track->songwriter ? track->songwriter : NULL;
 362     id3->album = *cue->title ? cue->title : NULL;
 363
 364     /* if the album artist is the same as the track artist, we hide it. */
 365     if (strcmp(cue->performer, track->performer))
 366         id3->albumartist = *cue->performer ? cue->performer : NULL;
 367     else
 368         id3->albumartist = NULL;
 369
 370     int i = cue->curr_track_idx;
 371     id3->tracknum = i+1;
 372     if (id3->track_string)
 373         snprintf(id3->track_string, 10, "%d/%d", i+1, cue->track_count);
 374 }
 375
 376 #ifdef HAVE_LCD_BITMAP
 377 static inline void draw_veritcal_line_mark(struct screen * screen,
 378                                            int x, int y, int h)
 379 {
 380     screen->set_drawmode(DRMODE_COMPLEMENT);
 381     screen->vline(x, y, y+h-1);
 382 }
 383
 384 /* draw the cuesheet markers for a track of length "tracklen",
 385    between (x1,y) and (x2,y) */
 386 void cue_draw_markers(struct screen *screen, 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 < curr_cue->track_count; i++)
 392     {
 393         xi = x1 + (w * curr_cue->tracks[i].offset)/tracklen;
 394         draw_veritcal_line_mark(screen, xi, y, h);
 395     }
 396 }
 397 #endif