apps/iap.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Alan Korr & Nick Robinson
  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 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <stdarg.h>
  22 #include <memory.h>
  23 #include <string.h>
  24
  25 #include "iap.h"
  26 #include "button.h"
  27 #include "config.h"
  28 #include "cpu.h"
  29 #include "system.h"
  30 #include "kernel.h"
  31 #include "serial.h"
  32 #include "appevents.h"
  33
  34 #include "playlist.h"
  35 #include "playback.h"
  36 #include "audio.h"
  37 #include "settings.h"
  38 #include "metadata.h"
  39 #include "wps.h"
  40 #include "sound.h"
  41 #include "action.h"
  42 #include "powermgmt.h"
  43
  44 #include "tuner.h"
  45 #include "ipod_remote_tuner.h"
  46
  47 static volatile int iap_pollspeed = 0;
  48 static volatile bool iap_remotetick = true;
  49 static bool iap_setupflag = false, iap_updateflag = false;
  50 static int iap_changedctr = 0;
  51
  52 static unsigned long iap_remotebtn = 0;
  53 static int iap_repeatbtn = 0;
  54 static bool iap_btnrepeat = false, iap_btnshuffle = false;
  55
  56 unsigned char serbuf[RX_BUFLEN];
  57 static int serbuf_i = 0;
  58
  59 static unsigned char response[TX_BUFLEN];
  60 static int responselen;
  61
  62 static void iap_task(void)
  63 {
  64     static int count = 0;
  65
  66     count += iap_pollspeed;
  67     if (count < (500/10)) return;
  68
  69     /* exec every 500ms if pollspeed == 1 */
  70     count = 0;
  71     queue_post(&button_queue, SYS_IAP_PERIODIC, 0);
  72 }
  73
  74 void iap_setup(int ratenum)
  75 {
  76     iap_bitrate_set(ratenum);
  77     iap_pollspeed = 0;
  78     iap_remotetick = true;
  79     iap_updateflag = false;
  80     iap_changedctr = 0;
  81     iap_setupflag = true;
  82     iap_remotebtn = BUTTON_NONE;
  83     tick_add_task(iap_task);
  84     add_event(PLAYBACK_EVENT_TRACK_CHANGE, false, iap_track_changed);
  85 }
  86
  87 void iap_bitrate_set(int ratenum)
  88 {
  89     switch(ratenum)
  90     {
  91         case 0:
  92             serial_bitrate(0);
  93             break;
  94         case 1:
  95             serial_bitrate(9600);
  96             break;
  97         case 2:
  98             serial_bitrate(19200);
  99             break;
 100         case 3:
 101             serial_bitrate(38400);
 102             break;
 103         case 4:
 104             serial_bitrate(57600);
 105             break;
 106     }
 107 }
 108
 109 /* Message format:
 110    0xff
 111    0x55
 112    length
 113    mode
 114    command (2 bytes)
 115    parameters (0-n bytes)
 116    checksum (length+mode+parameters+checksum == 0)
 117 */
 118
 119 void iap_send_pkt(const unsigned char * data, int len)
 120 {
 121     int i, chksum;
 122
 123     if(len > TX_BUFLEN-4) len = TX_BUFLEN-4;
 124     responselen = len + 4;
 125
 126     response[0] = 0xFF;
 127     response[1] = 0x55;
 128
 129     chksum = response[2] = len;
 130     for(i = 0; i < len; i ++)
 131     {
 132         chksum += data[i];
 133         response[i+3] = data[i];
 134     }
 135
 136     response[i+3] = 0x100 - (chksum & 0xFF);
 137
 138     for(i = 0; i < responselen; i ++)
 139     {
 140         while (!tx_rdy()) ;
 141         tx_writec(response[i]);
 142     }
 143 }
 144
 145 int iap_getc(unsigned char x)
 146 {
 147     static unsigned char last_x = 0;
 148     static bool newpkt = true;
 149     static unsigned char chksum = 0;
 150
 151     /* Restart if the sync word is seen */
 152     if(x == 0x55 && last_x == 0xff/* && newpkt*/)
 153     {
 154         serbuf[0] = 0;
 155         serbuf_i = 0;
 156         chksum = 0;
 157         newpkt = false;
 158     }
 159     else
 160     {
 161         if(serbuf_i >= RX_BUFLEN)
 162             serbuf_i = 0;
 163
 164         serbuf[serbuf_i++] = x;
 165         chksum += x;
 166     }
 167     last_x = x;
 168
 169     /* Broadcast to queue if we have a complete message */
 170     if(serbuf_i && (serbuf_i == serbuf[0]+2))
 171     {
 172         serbuf_i = 0;
 173         newpkt = true;
 174         if(chksum == 0)
 175             queue_post(&button_queue, SYS_IAP_HANDLEPKT, 0);
 176     }
 177     return newpkt;
 178 }
 179
 180 /* called by playback when the next track starts */
 181 void iap_track_changed(void *ignored)
 182 {
 183     (void)ignored;
 184     iap_changedctr = 1;
 185 }
 186
 187 void iap_periodic(void)
 188 {
 189     if(!iap_setupflag) return;
 190     if(!iap_pollspeed) return;
 191
 192     unsigned char data[] = {0x04, 0x00, 0x27, 0x04, 0x00, 0x00, 0x00, 0x00};
 193     unsigned long time_elapsed = audio_current_track()->elapsed;
 194
 195     time_elapsed += wps_get_ff_rewind_count();
 196
 197     data[3] = 0x04; /* playing */
 198
 199     /* If info has changed, don't flag it right away */
 200     if(iap_changedctr && iap_changedctr++ >= iap_pollspeed * 2)
 201     {
 202         /* track info has changed */
 203         iap_changedctr = 0;
 204         data[3] = 0x01; /* 0x02 has same effect?  */
 205         iap_updateflag = true;
 206     }
 207
 208     data[4] = time_elapsed >> 24;
 209     data[5] = time_elapsed >> 16;
 210     data[6] = time_elapsed >> 8;
 211     data[7] = time_elapsed;
 212     iap_send_pkt(data, sizeof(data));
 213 }
 214
 215 void iap_set_remote_volume(void)
 216 {
 217     unsigned char data[] = {0x03, 0x0D, 0x04, 0x00, 0x00};
 218     data[4] = (char)((global_settings.volume+58) * 4);
 219     iap_send_pkt(data, sizeof(data));
 220 }
 221
 222 void iap_handlepkt(void)
 223 {
 224
 225     if(!iap_setupflag) return;
 226     if(serbuf[0] == 0) return;
 227
 228     /* if we are waiting for a remote button to go out,
 229        delay the handling of the new packet */
 230     if(!iap_remotetick)
 231     {
 232         queue_post(&button_queue, SYS_IAP_HANDLEPKT, 0);
 233         return;
 234     }
 235
 236     /* Handle Mode 0 */
 237     if (serbuf[1] == 0x00)
 238     {
 239         switch (serbuf[2])
 240         {
 241             case 0x24:
 242             {
 243                 /* ipod video send this */
 244                 unsigned char data[] = {0x00, 0x25, 0x00, 0x00, 0x00,
 245                                                 0x00, 0x00, 0x00, 0x00,0x01};
 246                 iap_send_pkt(data, sizeof(data));
 247                 break;
 248             }
 249
 250             case 0x18:
 251             {
 252                 /* ciphered authentication command */
 253                 /* Isn't used since we don't send the 0x00 0x17 command */
 254                 break;
 255             }
 256
 257             case 0x15:
 258             {
 259                 unsigned char data0[] = {0x00, 0x16, 0x00};
 260                 iap_send_pkt(data0, sizeof(data0));
 261                 unsigned char data1[] = {0x00, 0x27, 0x00};
 262                 iap_send_pkt(data1, sizeof(data1));
 263                 /* authentication ack, mandatory to enable some hardware */
 264                 unsigned char data2[] = {0x00, 0x19, 0x00};
 265                 iap_send_pkt(data2, sizeof(data2));
 266                 if (radio_present == 1)
 267                 {
 268                     /* get tuner capacities */
 269                     unsigned char data3[] = {0x07, 0x01};
 270                     iap_send_pkt(data3, sizeof(data3));
 271                 }
 272                 iap_set_remote_volume();
 273                 break;
 274             }
 275
 276             case 0x13:
 277             {
 278                 unsigned char data[] = {0x00, 0x02, 0x00, 0x13};
 279                 iap_send_pkt(data, sizeof(data));
 280
 281                 if (serbuf[6] == 0x35)
 282                 /* FM transmitter sends this: */
 283                 /* FF 55 0E 00 13 00 00 00 35 00 00 00 04 00 00 00 00 A6 (??)*/
 284                 {
 285                     unsigned char data2[] = {0x00, 0x27, 0x00};
 286                     iap_send_pkt(data2, sizeof(data2));
 287                     unsigned char data3[] = {0x05, 0x02};
 288                     iap_send_pkt(data3, sizeof(data3));
 289                 }
 290
 291                 else
 292                 {
 293                     /* ipod fm remote sends this: */
 294                     /* FF 55 0E 00 13 00 00 00 8D 00 00 00 0E 00 00 00 03 41 */
 295                     if (serbuf[6] |= 0x80)
 296                         radio_present = 1;
 297                     unsigned char data4[] = {0x00, 0x14};
 298                     iap_send_pkt(data4, sizeof(data4));
 299                 }
 300                 break;
 301             }
 302
 303             /* Init */
 304             case 0x0F:
 305             {
 306                 unsigned char data[] = {0x00, 0x10, 0x00, 0x01, 0x05};
 307                 data[2] = serbuf[3];
 308                 iap_send_pkt(data, sizeof(data));
 309                 break;
 310             }
 311
 312             /* get model info */
 313             case 0x0D:
 314             {
 315                 /* ipod is supposed to work only with 5G and nano 2G */
 316                 /*{0x00, 0x0E, 0x00, 0x0B, 0x00, 0x05, 0x50, 0x41, 0x31, 0x34,
 317                         0x37, 0x4C, 0x4C, 0x00};    PA147LL (IPOD 5G 60 GO) */
 318                 unsigned char data[] = {0x00, 0x0E, 0x00, 0x0B, 0x00, 0x10,
 319                                     'R', 'O', 'C', 'K', 'B', 'O', 'X', 0x00};
 320                 iap_send_pkt(data, sizeof(data));
 321                 break;
 322             }
 323
 324             /* Ipod FM remote sends this: FF 55 02 00 09 F5  */
 325             case 0x09:
 326             {
 327                 /* ipod5G firmware version */
 328                 unsigned char data[] = {0x00, 0x0A, 0x01, 0x02, 0x01 };
 329                 iap_send_pkt(data, sizeof(data));
 330                 break;
 331             }
 332
 333             /* FM transmitter sends this: */
 334             /* FF 55 02 00 05 F9 (mode switch: AiR mode) */
 335             case 0x05:
 336             {
 337                 unsigned char data[] = {0x00, 0x02, 0x06,
 338                                         0x05, 0x00, 0x00, 0x0B, 0xB8, 0x28};
 339                 iap_send_pkt(data, sizeof(data));
 340                 unsigned char data2[] = {0x00, 0x02, 0x00, 0x05};
 341                 iap_send_pkt(data2, sizeof(data2));
 342                 break;
 343             }
 344
 345             case 0x01:
 346             {
 347                 /* FM transmitter sends this: */
 348                 /* FF 55 06 00 01 05 00 02 01 F1 (mode switch) */
 349                 if(serbuf[3] == 0x05)
 350                 {
 351                     sleep(HZ/3);
 352                     unsigned char data[] = {0x05, 0x02};
 353                     iap_send_pkt(data, sizeof(data));
 354                 }
 355                 /* FM remote sends this: */
 356                 /* FF 55 03 00 01 02 FA (1st thing sent) */
 357                 else if(serbuf[3] == 0x02)
 358                 {
 359                     /* useful only for apple firmware */
 360                 }
 361                 break;
 362             }
 363
 364             /* default response is with cmd ok packet */
 365             default:
 366             {
 367                 unsigned char data[] = {0x00, 0x02, 0x00, 0x00};
 368                 data[3] = serbuf[2]; /* respond with cmd */
 369                 iap_send_pkt(data, sizeof(data));
 370                 break;
 371             }
 372         }
 373     }
 374     /* Handle Mode 2 */
 375     else if (serbuf[1] == 0x02)
 376     {
 377         if(serbuf[2] != 0) return;
 378         iap_remotebtn = BUTTON_NONE;
 379         iap_remotetick = false;
 380
 381         if(serbuf[0] >= 3 && serbuf[3] != 0)
 382         {
 383             if(serbuf[3] & 1)
 384                 iap_remotebtn |= BUTTON_RC_PLAY;
 385             if(serbuf[3] & 2)
 386                 iap_remotebtn |= BUTTON_RC_VOL_UP;
 387             if(serbuf[3] & 4)
 388                 iap_remotebtn |= BUTTON_RC_VOL_DOWN;
 389             if(serbuf[3] & 8)
 390                 iap_remotebtn |= BUTTON_RC_RIGHT;
 391             if(serbuf[3] & 16)
 392                 iap_remotebtn |= BUTTON_RC_LEFT;
 393         }
 394         else if(serbuf[0] >= 4 && serbuf[4] != 0)
 395         {
 396             if(serbuf[4] & 1) /* play */
 397             {
 398                 if (audio_status() != AUDIO_STATUS_PLAY)
 399                 {
 400                     iap_remotebtn |= BUTTON_RC_PLAY;
 401                     iap_repeatbtn = 2;
 402                     iap_remotetick = false;
 403                     iap_changedctr = 1;
 404                 }
 405             }
 406             if(serbuf[4] & 2) /* pause */
 407             {
 408                 if (audio_status() == AUDIO_STATUS_PLAY)
 409                 {
 410                     iap_remotebtn |= BUTTON_RC_PLAY;
 411                     iap_repeatbtn = 2;
 412                     iap_remotetick = false;
 413                     iap_changedctr = 1;
 414                 }
 415             }
 416             if((serbuf[4] & 128) && !iap_btnshuffle) /* shuffle */
 417             {
 418                 iap_btnshuffle = true;
 419                 if(!global_settings.playlist_shuffle)
 420                 {
 421                     global_settings.playlist_shuffle = 1;
 422                     settings_save();
 423                     if (audio_status() & AUDIO_STATUS_PLAY)
 424                         playlist_randomise(NULL, current_tick, true);
 425                 }
 426                 else if(global_settings.playlist_shuffle)
 427                 {
 428                     global_settings.playlist_shuffle = 0;
 429                     settings_save();
 430                     if (audio_status() & AUDIO_STATUS_PLAY)
 431                         playlist_sort(NULL, true);
 432                 }
 433             }
 434             else
 435                 iap_btnshuffle = false;
 436         }
 437         else if(serbuf[0] >= 5 && serbuf[5] != 0)
 438         {
 439             if((serbuf[5] & 1) && !iap_btnrepeat) /* repeat */
 440             {
 441                 int oldmode = global_settings.repeat_mode;
 442                 iap_btnrepeat = true;
 443
 444                 if (oldmode == REPEAT_ONE)
 445                         global_settings.repeat_mode = REPEAT_OFF;
 446                 else if (oldmode == REPEAT_ALL)
 447                         global_settings.repeat_mode = REPEAT_ONE;
 448                 else if (oldmode == REPEAT_OFF)
 449                         global_settings.repeat_mode = REPEAT_ALL;
 450
 451                 settings_save();
 452                 if (audio_status() & AUDIO_STATUS_PLAY)
 453                 audio_flush_and_reload_tracks();
 454             }
 455             else
 456                 iap_btnrepeat = false;
 457
 458             if(serbuf[5] & 16) /* ffwd */
 459             {
 460                 iap_remotebtn |= BUTTON_RC_RIGHT;
 461             }
 462             if(serbuf[5] & 32) /* frwd */
 463             {
 464                 iap_remotebtn |= BUTTON_RC_LEFT;
 465             }
 466         }
 467     }
 468     /* Handle Mode 3 */
 469     else if (serbuf[1] == 0x03)
 470     {
 471         switch(serbuf[2])
 472         {
 473             /* some kind of status packet? */
 474             case 0x01:
 475             {
 476                 unsigned char data[] = {0x03, 0x02, 0x00, 0x00, 0x00, 0x00};
 477                 iap_send_pkt(data, sizeof(data));
 478                 break;
 479             }
 480
 481             case 0x08:
 482             {
 483                 /* ACK */
 484                 unsigned char data[] = {0x03, 0x00, 0x00, 0x08};
 485                 iap_send_pkt(data, sizeof(data));
 486                 break;
 487             }
 488
 489             case 0x0C:
 490             {
 491                 /* request ipod volume */
 492                 if (serbuf[3] == 0x04)
 493                 {
 494                     iap_set_remote_volume();
 495                 }
 496                 break;
 497             }
 498             /* get volume from accessory */
 499             case 0x0E:
 500                 if (serbuf[3] == 0x04)
 501                     global_settings.volume = (-58)+((int)serbuf[5]+1)/4;
 502                     sound_set_volume(global_settings.volume);
 503                 break;
 504         }
 505     }
 506     /* Handle Mode 4 */
 507     else if (serbuf[1] == 0x04)
 508     {
 509         switch (((unsigned long)serbuf[2] << 8) | serbuf[3])
 510         {
 511             /* Get data updated??? flag */
 512             case 0x0009:
 513             {
 514                 unsigned char data[] = {0x04, 0x00, 0x0A, 0x00};
 515                 data[3] = iap_updateflag ? 0 : 1;
 516                 iap_send_pkt(data, sizeof(data));
 517                 break;
 518             }
 519             /* Set data updated??? flag */
 520             case 0x000B:
 521             {
 522                 iap_updateflag = serbuf[4] ? 0 : 1;
 523                 /* respond with cmd ok packet */
 524                 unsigned char data[] = {0x04, 0x00, 0x01, 0x00, 0x00, 0x0B};
 525                 iap_send_pkt(data, sizeof(data));
 526                 break;
 527             }
 528             /* Get iPod size? */
 529             case 0x0012:
 530             {
 531                 unsigned char data[] = {0x04, 0x00, 0x13, 0x01, 0x0B};
 532                 iap_send_pkt(data, sizeof(data));
 533                 break;
 534             }
 535             /* Get count of given types */
 536             case 0x0018:
 537             {
 538                 unsigned char data[] = {0x04, 0x00, 0x19, 0x00, 0x00, 0x00, 0x00};
 539                 unsigned long num = 0;
 540                 switch(serbuf[4]) /* type number */
 541                 {
 542                     case 0x01: /* total number of playlists */
 543                         num = 1;
 544                         break;
 545                     case 0x05: /* total number of songs */
 546                         num = 1;
 547                 }
 548                 data[3] = num >> 24;
 549                 data[4] = num >> 16;
 550                 data[5] = num >> 8;
 551                 data[6] = num;
 552                 iap_send_pkt(data, sizeof(data));
 553                 break;
 554             }
 555             /* Get time and status */
 556             case 0x001C:
 557             {
 558                 unsigned char data[] = {0x04, 0x00, 0x1D, 0x00, 0x00, 0x00,
 559                                         0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 560                 struct mp3entry *id3 = audio_current_track();
 561                 unsigned long time_total = id3->length;
 562                 unsigned long time_elapsed = id3->elapsed;
 563                 int status = audio_status();
 564                 data[3] = time_total >> 24;
 565                 data[4] = time_total >> 16;
 566                 data[5] = time_total >> 8;
 567                 data[6] = time_total;
 568                 data[7] = time_elapsed >> 24;
 569                 data[8] = time_elapsed >> 16;
 570                 data[9] = time_elapsed >> 8;
 571                 data[10] = time_elapsed;
 572                 if (status == AUDIO_STATUS_PLAY)
 573                     data[11] = 0x01; /* play */
 574                 else if (status & AUDIO_STATUS_PAUSE)
 575                     data[11] = 0x02; /* pause */
 576                 iap_send_pkt(data, sizeof(data));
 577                 break;
 578             }
 579             /* Get current pos in playlist */
 580             case 0x001E:
 581             {
 582                 unsigned char data[] = {0x04, 0x00, 0x1F, 0x00, 0x00, 0x00, 0x00};
 583                 long playlist_pos = playlist_next(0);
 584                 playlist_pos -= playlist_get_first_index(NULL);
 585                 if(playlist_pos < 0)
 586                     playlist_pos += playlist_amount();
 587                 data[3] = playlist_pos >> 24;
 588                 data[4] = playlist_pos >> 16;
 589                 data[5] = playlist_pos >> 8;
 590                 data[6] = playlist_pos;
 591                 iap_send_pkt(data, sizeof(data));
 592                 break;
 593             }
 594             /* Get title of a song number */
 595             case 0x0020:
 596             /* Get artist of a song number */
 597             case 0x0022:
 598             /* Get album of a song number */
 599             case 0x0024:
 600             {
 601                 unsigned char data[70] = {0x04, 0x00, 0xFF};
 602                 struct mp3entry id3;
 603                 int fd;
 604                 size_t len;
 605                 long tracknum = (signed long)serbuf[4] << 24 |
 606                                 (signed long)serbuf[5] << 16 |
 607                                 (signed long)serbuf[6] << 8 | serbuf[7];
 608                 data[2] = serbuf[3] + 1;
 609                 memcpy(&id3, audio_current_track(), sizeof(id3));
 610                 tracknum += playlist_get_first_index(NULL);
 611                 if(tracknum >= playlist_amount())
 612                     tracknum -= playlist_amount();
 613
 614                 /* If the tracknumber is not the current one,
 615                    read id3 from disk */
 616                 if(playlist_next(0) != tracknum)
 617                 {
 618                     struct playlist_track_info info;
 619                     playlist_get_track_info(NULL, tracknum, &info);
 620                     fd = open(info.filename, O_RDONLY);
 621                     memset(&id3, 0, sizeof(struct mp3entry));
 622                     get_metadata(&id3, fd, info.filename);
 623                     close(fd);
 624                 }
 625
 626                 /* Return the requested track data */
 627                 switch(serbuf[3])
 628                 {
 629                     case 0x20:
 630                         len = strlcpy((char *)&data[3], id3.title, 64);
 631                             iap_send_pkt(data, 4+len);
 632                         break;
 633                     case 0x22:
 634                         len = strlcpy((char *)&data[3], id3.artist, 64);
 635                             iap_send_pkt(data, 4+len);
 636                         break;
 637                     case 0x24:
 638                         len = strlcpy((char *)&data[3], id3.album, 64);
 639                             iap_send_pkt(data, 4+len);
 640                         break;
 641                 }
 642                 break;
 643             }
 644             /* Set polling mode */
 645             case 0x0026:
 646             {
 647                 iap_pollspeed = serbuf[4] ? 1 : 0;
 648                 /*responsed with cmd ok packet */
 649                 unsigned char data[] = {0x04, 0x00, 0x01, 0x00, 0x00, 0x26};
 650                 iap_send_pkt(data, sizeof(data));
 651                 break;
 652             }
 653             /* AiR playback control */
 654             case 0x0029:
 655             {
 656                 /* respond with cmd ok packet */
 657                 unsigned char data[] = {0x04, 0x00, 0x01, 0x00, 0x00, 0x29};
 658                 iap_send_pkt(data, sizeof(data));
 659                 switch(serbuf[4])
 660                 {
 661                     case 0x01: /* play/pause */
 662                         iap_remotebtn = BUTTON_RC_PLAY;
 663                         iap_repeatbtn = 2;
 664                         iap_remotetick = false;
 665                         iap_changedctr = 1;
 666                         break;
 667                     case 0x02: /* stop */
 668                         iap_remotebtn = BUTTON_RC_PLAY|BUTTON_REPEAT;
 669                         iap_repeatbtn = 2;
 670                         iap_remotetick = false;
 671                         iap_changedctr = 1;
 672                         break;
 673                     case 0x03: /* skip++ */
 674                         iap_remotebtn = BUTTON_RC_RIGHT;
 675                         iap_repeatbtn = 2;
 676                         iap_remotetick = false;
 677                         break;
 678                     case 0x04: /* skip-- */
 679                         iap_remotebtn = BUTTON_RC_LEFT;
 680                         iap_repeatbtn = 2;
 681                         iap_remotetick = false;
 682                         break;
 683                     case 0x05: /* ffwd */
 684                         iap_remotebtn = BUTTON_RC_RIGHT;
 685                         iap_remotetick = false;
 686                         if(iap_pollspeed) iap_pollspeed = 5;
 687                         break;
 688                     case 0x06: /* frwd */
 689                         iap_remotebtn = BUTTON_RC_LEFT;
 690                         iap_remotetick = false;
 691                         if(iap_pollspeed) iap_pollspeed = 5;
 692                         break;
 693                     case 0x07: /* end ffwd/frwd */
 694                         iap_remotebtn = BUTTON_NONE;
 695                         iap_remotetick = false;
 696                         if(iap_pollspeed) iap_pollspeed = 1;
 697                         break;
 698                 }
 699                 break;
 700             }
 701             /* Get shuffle mode */
 702             case 0x002C:
 703             {
 704                 unsigned char data[] = {0x04, 0x00, 0x2D, 0x00};
 705                 data[3] = global_settings.playlist_shuffle ? 1 : 0;
 706                 iap_send_pkt(data, sizeof(data));
 707                 break;
 708             }
 709             /* Set shuffle mode */
 710             case 0x002E:
 711             {
 712                 if(serbuf[4] && !global_settings.playlist_shuffle)
 713                 {
 714                     global_settings.playlist_shuffle = 1;
 715                     settings_save();
 716                     if (audio_status() & AUDIO_STATUS_PLAY)
 717                         playlist_randomise(NULL, current_tick, true);
 718                 }
 719                 else if(!serbuf[4] && global_settings.playlist_shuffle)
 720                 {
 721                     global_settings.playlist_shuffle = 0;
 722                     settings_save();
 723                     if (audio_status() & AUDIO_STATUS_PLAY)
 724                         playlist_sort(NULL, true);
 725                 }
 726
 727
 728                 /* respond with cmd ok packet */
 729                 unsigned char data[] = {0x04, 0x00, 0x01, 0x00, 0x00, 0x2E};
 730                 iap_send_pkt(data, sizeof(data));
 731                 break;
 732             }
 733             /* Get repeat mode */
 734             case 0x002F:
 735             {
 736                 unsigned char data[] = {0x04, 0x00, 0x30, 0x00};
 737                 if(global_settings.repeat_mode == REPEAT_OFF)
 738                     data[3] = 0;
 739                 else if(global_settings.repeat_mode == REPEAT_ONE)
 740                     data[3] = 1;
 741                 else
 742                     data[3] = 2;
 743                 iap_send_pkt(data, sizeof(data));
 744                 break;
 745             }
 746             /* Set repeat mode */
 747             case 0x0031:
 748             {
 749                 int oldmode = global_settings.repeat_mode;
 750                 if (serbuf[4] == 0)
 751                     global_settings.repeat_mode = REPEAT_OFF;
 752                 else if (serbuf[4] == 1)
 753                     global_settings.repeat_mode = REPEAT_ONE;
 754                 else if (serbuf[4] == 2)
 755                     global_settings.repeat_mode = REPEAT_ALL;
 756
 757                 if (oldmode != global_settings.repeat_mode)
 758                 {
 759                     settings_save();
 760                     if (audio_status() & AUDIO_STATUS_PLAY)
 761                         audio_flush_and_reload_tracks();
 762                 }
 763
 764                 /* respond with cmd ok packet */
 765                 unsigned char data[] = {0x04, 0x00, 0x01, 0x00, 0x00, 0x31};
 766                 iap_send_pkt(data, sizeof(data));
 767                 break;
 768             }
 769             /* Get Max Screen Size for Picture Upload??? */
 770             case 0x0033:
 771             {
 772                 unsigned char data[] = {0x04, 0x00, 0x34, 0x01, 0x36, 0x00, 0xA8, 0x01};
 773                 iap_send_pkt(data, sizeof(data));
 774                 break;
 775             }
 776             /* Get number songs in current playlist */
 777             case 0x0035:
 778             {
 779                 unsigned char data[] = {0x04, 0x00, 0x36, 0x00, 0x00, 0x00, 0x00};
 780                 unsigned long playlist_amt = playlist_amount();
 781                 data[3] = playlist_amt >> 24;
 782                 data[4] = playlist_amt >> 16;
 783                 data[5] = playlist_amt >> 8;
 784                 data[6] = playlist_amt;
 785                 iap_send_pkt(data, sizeof(data));
 786                 break;
 787             }
 788             /* Jump to track number in current playlist */
 789             case 0x0037:
 790             {
 791                 int paused = (is_wps_fading() || (audio_status() & AUDIO_STATUS_PAUSE));
 792                 long tracknum = (signed long)serbuf[4] << 24 |
 793                                 (signed long)serbuf[5] << 16 |
 794                                 (signed long)serbuf[6] << 8 | serbuf[7];
 795                 audio_pause();
 796                 audio_skip(tracknum - playlist_next(0));
 797                 if (!paused)
 798                     audio_resume();
 799
 800                 /* respond with cmd ok packet */
 801                 unsigned char data[] = {0x04, 0x00, 0x01, 0x00, 0x00, 0x00};
 802                 data[4] = serbuf[2];
 803                 data[5] = serbuf[3];
 804                 iap_send_pkt(data, sizeof(data));
 805                 break;
 806             }
 807             default:
 808             {
 809                 /* default response is with cmd ok packet */
 810                 unsigned char data[] = {0x04, 0x00, 0x01, 0x00, 0x00, 0x00};
 811                 data[4] = serbuf[2];
 812                 data[5] = serbuf[3];
 813                 iap_send_pkt(data, sizeof(data));
 814                 break;
 815             }
 816         }
 817     }
 818     /* Handle Mode 7 */
 819     else if (serbuf[1] == 0x07)
 820     {
 821         switch(serbuf[2])
 822         {
 823             /* tuner capabilities */
 824             case 0x02:
 825             {
 826                 /* do nothing */
 827
 828                 unsigned char data[] = {0x00, 0x27, 0x00};
 829                 iap_send_pkt(data, sizeof(data));
 830                 break;
 831             }
 832             /* actual tuner frequency */
 833             case 0x0A:
 834             /* fall through */
 835             /* tuner frequency from scan */
 836             case 0x13:
 837             {
 838                 rmt_tuner_freq();
 839                 break;
 840             }
 841             /* RDS station name 0x21 1E 00 + ASCII text*/
 842             case 0x21:
 843             {
 844                 rmt_tuner_rds_data();
 845                 break;
 846             }
 847         }
 848     }
 849     serbuf[0] = 0;
 850 }
 851
 852 int remote_control_rx(void)
 853 {
 854     int btn = iap_remotebtn;
 855     if(iap_repeatbtn)
 856     {
 857         iap_repeatbtn--;
 858         if(!iap_repeatbtn)
 859         {
 860             iap_remotebtn = BUTTON_NONE;
 861             iap_remotetick = true;
 862         }
 863     }
 864     else
 865         iap_remotetick = true;
 866
 867     return btn;
 868 }