apps/playback.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005-2007 Miika Pekkarinen
  11  * Copyright (C) 2007-2008 Nicolas Pennequin
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22
  23 /* TODO: Pause should be handled in here, rather than PCMBUF so that voice can
  24  * play whilst audio is paused */
  25
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <ctype.h>
  30
  31 #include "system.h"
  32 #include "thread.h"
  33 #include "file.h"
  34 #include "panic.h"
  35 #include "memory.h"
  36 #include "lcd.h"
  37 #include "font.h"
  38 #include "button.h"
  39 #include "kernel.h"
  40 #include "tree.h"
  41 #include "debug.h"
  42 #include "sprintf.h"
  43 #include "settings.h"
  44 #include "codecs.h"
  45 #include "audio.h"
  46 #include "buffering.h"
  47 #include "appevents.h"
  48 #include "voice_thread.h"
  49 #include "mp3_playback.h"
  50 #include "usb.h"
  51 #include "storage.h"
  52 #include "screens.h"
  53 #include "playlist.h"
  54 #include "playback.h"
  55 #include "pcmbuf.h"
  56 #include "buffer.h"
  57 #include "dsp.h"
  58 #include "abrepeat.h"
  59 #include "cuesheet.h"
  60 #ifdef HAVE_TAGCACHE
  61 #include "tagcache.h"
  62 #endif
  63 #ifdef HAVE_LCD_BITMAP
  64 #include "icons.h"
  65 #include "peakmeter.h"
  66 #include "action.h"
  67 #include "albumart.h"
  68 #endif
  69 #include "lang.h"
  70 #include "bookmark.h"
  71 #include "misc.h"
  72 #include "sound.h"
  73 #include "metadata.h"
  74 #include "splash.h"
  75 #include "talk.h"
  76 #include "ata_idle_notify.h"
  77
  78 #ifdef HAVE_RECORDING
  79 #include "recording.h"
  80 #include "talk.h"
  81 #include "pcm_record.h"
  82 #endif
  83
  84 #ifdef IPOD_ACCESSORY_PROTOCOL
  85 #include "iap.h"
  86 #endif
  87
  88 #define PLAYBACK_VOICE
  89
  90 /* amount of guess-space to allow for codecs that must hunt and peck
  91  * for their correct seeek target, 32k seems a good size */
  92 #define AUDIO_REBUFFER_GUESS_SIZE    (1024*32)
  93
  94 /* Define LOGF_ENABLE to enable logf output in this file */
  95 /*#define LOGF_ENABLE*/
  96 #include "logf.h"
  97
  98 /* macros to enable logf for queues
  99    logging on SYS_TIMEOUT can be disabled */
 100 #ifdef SIMULATOR
 101 /* Define this for logf output of all queuing except SYS_TIMEOUT */
 102 #define PLAYBACK_LOGQUEUES
 103 /* Define this to logf SYS_TIMEOUT messages */
 104 /*#define PLAYBACK_LOGQUEUES_SYS_TIMEOUT*/
 105 #endif
 106
 107 #ifdef PLAYBACK_LOGQUEUES
 108 #define LOGFQUEUE logf
 109 #else
 110 #define LOGFQUEUE(...)
 111 #endif
 112
 113 #ifdef PLAYBACK_LOGQUEUES_SYS_TIMEOUT
 114 #define LOGFQUEUE_SYS_TIMEOUT logf
 115 #else
 116 #define LOGFQUEUE_SYS_TIMEOUT(...)
 117 #endif
 118
 119
 120 /* Define one constant that includes recording related functionality */
 121 #if defined(HAVE_RECORDING) && !defined(SIMULATOR)
 122 #define AUDIO_HAVE_RECORDING
 123 #endif
 124
 125 enum {
 126     Q_NULL = 0,
 127     Q_AUDIO_PLAY = 1,
 128     Q_AUDIO_STOP,
 129     Q_AUDIO_PAUSE,
 130     Q_AUDIO_SKIP,
 131     Q_AUDIO_PRE_FF_REWIND,
 132     Q_AUDIO_FF_REWIND,
 133     Q_AUDIO_CHECK_NEW_TRACK,
 134     Q_AUDIO_FLUSH,
 135     Q_AUDIO_TRACK_CHANGED,
 136     Q_AUDIO_DIR_SKIP,
 137     Q_AUDIO_POSTINIT,
 138     Q_AUDIO_FILL_BUFFER,
 139     Q_AUDIO_FINISH_LOAD,
 140     Q_CODEC_REQUEST_COMPLETE,
 141     Q_CODEC_REQUEST_FAILED,
 142
 143     Q_CODEC_LOAD,
 144     Q_CODEC_LOAD_DISK,
 145
 146 #ifdef AUDIO_HAVE_RECORDING
 147     Q_ENCODER_LOAD_DISK,
 148     Q_ENCODER_RECORD,
 149 #endif
 150
 151     Q_CODEC_DO_CALLBACK,
 152 };
 153
 154 enum filling_state {
 155     STATE_IDLE,     /* audio is stopped: nothing to do */
 156     STATE_FILLING,  /* adding tracks to the buffer */
 157     STATE_FULL,     /* can't add any more tracks */
 158     STATE_END_OF_PLAYLIST, /* all remaining tracks have been added */
 159     STATE_FINISHED, /* all remaining tracks are fully buffered */
 160 };
 161
 162 #define MAX_TRACK       128
 163
 164 #define MAX_TRACK_MASK  (MAX_TRACK-1)
 165
 166 /* As defined in plugins/lib/xxx2wav.h */
 167 #define GUARD_BUFSIZE  (32*1024)
 168
 169 /* As defined in plugin.lds */
 170 #if defined(CPU_PP)
 171 #define CODEC_IRAM_ORIGIN   ((unsigned char *)0x4000c000)
 172 #define CODEC_IRAM_SIZE     ((size_t)0xc000)
 173 #elif defined(IAUDIO_X5) || defined(IAUDIO_M5)
 174 #define CODEC_IRAM_ORIGIN   ((unsigned char *)0x10010000)
 175 #define CODEC_IRAM_SIZE     ((size_t)0x10000)
 176 #else
 177 #define CODEC_IRAM_ORIGIN   ((unsigned char *)0x1000c000)
 178 #define CODEC_IRAM_SIZE     ((size_t)0xc000)
 179 #endif
 180
 181 bool audio_is_initialized = false;
 182 static bool audio_thread_ready SHAREDBSS_ATTR = false;
 183
 184 /* Variables are commented with the threads that use them: *
 185  * A=audio, C=codec, V=voice. A suffix of - indicates that *
 186  * the variable is read but not updated on that thread.    */
 187 /* TBD: Split out "audio" and "playback" (ie. calling) threads */
 188
 189 /* Main state control */
 190 static volatile bool audio_codec_loaded SHAREDBSS_ATTR = false; /* Codec loaded? (C/A-) */
 191 static volatile bool playing SHAREDBSS_ATTR = false; /* Is audio playing? (A) */
 192 static volatile bool paused SHAREDBSS_ATTR = false; /* Is audio paused? (A/C-) */
 193
 194 /* Ring buffer where compressed audio and codecs are loaded */
 195 static unsigned char *filebuf = NULL;       /* Start of buffer (A/C-) */
 196 static unsigned char *malloc_buf = NULL;    /* Start of malloc buffer (A/C-) */
 197 /* FIXME: make filebuflen static */
 198 size_t filebuflen = 0;                      /* Size of buffer (A/C-) */
 199 /* FIXME: make buf_ridx (C/A-) */
 200
 201 /* Possible arrangements of the buffer */
 202 static int buffer_state = AUDIOBUF_STATE_TRASHED; /* Buffer state */
 203
 204 /* These are used to store the current and next (or prev if the current is the last)
 205  * mp3entry's in a round-robin system. This guarentees that the pointer returned
 206  * by audio_current/next_track will be valid for the full duration of the
 207  * currently playing track */
 208 static struct mp3entry mp3entry_buf[2];
 209 static struct mp3entry *thistrack_id3, /* the currently playing track */
 210                        *othertrack_id3; /* prev track during track-change-transition, or end of playlist,
 211                                          * next track otherwise */
 212 static struct mp3entry unbuffered_id3; /* the id3 for the first unbuffered track */
 213
 214 /* Track info structure about songs in the file buffer (A/C-) */
 215 struct track_info {
 216     int audio_hid;             /* The ID for the track's buffer handle */
 217     int id3_hid;               /* The ID for the track's metadata handle */
 218     int codec_hid;             /* The ID for the track's codec handle */
 219 #ifdef HAVE_ALBUMART
 220     int aa_hid;                /* The ID for the track's album art handle */
 221 #endif
 222
 223     size_t filesize;           /* File total length */
 224
 225     bool taginfo_ready;        /* Is metadata read */
 226 };
 227
 228 static struct track_info tracks[MAX_TRACK];
 229 static volatile int track_ridx = 0;  /* Track being decoded (A/C-) */
 230 static int track_widx = 0;           /* Track being buffered (A) */
 231
 232 #define CUR_TI (&tracks[track_ridx]) /* Playing track info pointer (A/C-) */
 233 static struct track_info *prev_ti = NULL;  /* Pointer to the previously played
 234                                               track */
 235
 236 /* Information used only for filling the buffer */
 237 /* Playlist steps from playing track to next track to be buffered (A) */
 238 static int last_peek_offset = 0;
 239
 240 /* Scrobbler support */
 241 static unsigned long prev_track_elapsed = 0; /* Previous track elapsed time (C/A-)*/
 242
 243 static enum filling_state filling;
 244
 245 /* Track change controls */
 246 static bool automatic_skip = false; /* Who initiated in-progress skip? (C/A-) */
 247 static bool dir_skip = false;       /* Is a directory skip pending? (A) */
 248 static bool new_playlist = false;   /* Are we starting a new playlist? (A) */
 249 static int wps_offset = 0;          /* Pending track change offset, to keep WPS responsive (A) */
 250 static bool skipped_during_pause = false; /* Do we need to clear the PCM buffer when playback resumes (A) */
 251
 252 static bool start_play_g = false; /* Used by audio_load_track to notify
 253                                      audio_finish_load_track about start_play */
 254
 255 /* True when a track load is in progress, i.e. audio_load_track() has returned
 256  * but audio_finish_load_track() hasn't been called yet. Used to avoid allowing
 257  * audio_load_track() to get called twice in a row, which would cause problems.
 258  */
 259 static bool track_load_started = false;
 260
 261 /* Set to true if the codec thread should send an audio stop request
 262  * (typically because the end of the playlist has been reached).
 263  */
 264 static bool codec_requested_stop = false;
 265
 266 #ifdef HAVE_DISK_STORAGE
 267 static size_t buffer_margin  = 0; /* Buffer margin aka anti-skip buffer (A/C-) */
 268 #endif
 269
 270 /* Multiple threads */
 271 /* Set the watermark to trigger buffer fill (A/C) */
 272 static void set_filebuf_watermark(void);
 273
 274 /* Audio thread */
 275 static struct event_queue       audio_queue SHAREDBSS_ATTR;
 276 static struct queue_sender_list audio_queue_sender_list SHAREDBSS_ATTR;
 277 static long audio_stack[(DEFAULT_STACK_SIZE + 0x1000)/sizeof(long)];
 278 static const char audio_thread_name[] = "audio";
 279
 280 static void audio_thread(void);
 281 static void audio_initiate_track_change(long direction);
 282 static bool audio_have_tracks(void);
 283 static void audio_reset_buffer(void);
 284 static void audio_stop_playback(void);
 285
 286 /* Codec thread */
 287 extern struct codec_api ci;
 288 static struct event_queue codec_queue SHAREDBSS_ATTR;
 289 static struct queue_sender_list codec_queue_sender_list;
 290 static long codec_stack[(DEFAULT_STACK_SIZE + 0x2000)/sizeof(long)]
 291 IBSS_ATTR;
 292 static const char codec_thread_name[] = "codec";
 293 unsigned int codec_thread_id; /* For modifying thread priority later. */
 294
 295 /* PCM buffer messaging */
 296 static struct event_queue pcmbuf_queue SHAREDBSS_ATTR;
 297
 298 /* Function to be called by pcm buffer callbacks.
 299  * Permissible Context(s): Audio interrupt
 300  */
 301 static void pcmbuf_callback_queue_post(long id, intptr_t data)
 302 {
 303     /* No lock since we're already in audio interrupt context */
 304     queue_post(&pcmbuf_queue, id, data);
 305 }
 306
 307 /* Scan the pcmbuf queue and return true if a message pulled.
 308  * Permissible Context(s): Thread
 309  */
 310 static bool pcmbuf_queue_scan(struct queue_event *ev)
 311 {
 312     if (!queue_empty(&pcmbuf_queue))
 313     {
 314         /* Transfer message to audio queue */
 315         pcm_play_lock();
 316         /* Pull message - never, ever any blocking call! */
 317         queue_wait_w_tmo(&pcmbuf_queue, ev, 0);
 318         pcm_play_unlock();
 319         return true;
 320     }
 321
 322     return false;
 323 }
 324
 325 /* Clear the pcmbuf queue of messages
 326  * Permissible Context(s): Thread
 327  */
 328 static void pcmbuf_queue_clear(void)
 329 {
 330     pcm_play_lock();
 331     queue_clear(&pcmbuf_queue);
 332     pcm_play_unlock();
 333 }
 334
 335 /* --- Helper functions --- */
 336
 337 static struct mp3entry *bufgetid3(int handle_id)
 338 {
 339     if (handle_id < 0)
 340         return NULL;
 341
 342     struct mp3entry *id3;
 343     ssize_t ret = bufgetdata(handle_id, 0, (void *)&id3);
 344
 345     if (ret < 0 || ret != sizeof(struct mp3entry))
 346         return NULL;
 347
 348     return id3;
 349 }
 350
 351 static bool clear_track_info(struct track_info *track)
 352 {
 353     /* bufclose returns true if the handle is not found, or if it is closed
 354      * successfully, so these checks are safe on non-existant handles */
 355     if (!track)
 356         return false;
 357
 358     if (track->codec_hid >= 0) {
 359         if (bufclose(track->codec_hid))
 360             track->codec_hid = -1;
 361         else
 362             return false;
 363     }
 364
 365     if (track->id3_hid >= 0) {
 366         if (bufclose(track->id3_hid))
 367             track->id3_hid = -1;
 368         else
 369             return false;
 370     }
 371
 372     if (track->audio_hid >= 0) {
 373         if (bufclose(track->audio_hid))
 374             track->audio_hid = -1;
 375         else
 376             return false;
 377     }
 378
 379 #ifdef HAVE_ALBUMART
 380     if (track->aa_hid >= 0) {
 381         if (bufclose(track->aa_hid))
 382             track->aa_hid = -1;
 383         else
 384             return false;
 385     }
 386 #endif
 387
 388     track->filesize = 0;
 389     track->taginfo_ready = false;
 390
 391     return true;
 392 }
 393
 394 /* --- External interfaces --- */
 395
 396 /* This sends a stop message and the audio thread will dump all it's
 397    subsequenct messages */
 398 void audio_hard_stop(void)
 399 {
 400     /* Stop playback */
 401     LOGFQUEUE("audio >| audio Q_AUDIO_STOP: 1");
 402     queue_send(&audio_queue, Q_AUDIO_STOP, 1);
 403 #ifdef PLAYBACK_VOICE
 404     voice_stop();
 405 #endif
 406 }
 407
 408 bool audio_restore_playback(int type)
 409 {
 410     switch (type)
 411     {
 412     case AUDIO_WANT_PLAYBACK:
 413         if (buffer_state != AUDIOBUF_STATE_INITIALIZED)
 414             audio_reset_buffer();
 415         return true;
 416     case AUDIO_WANT_VOICE:
 417         if (buffer_state == AUDIOBUF_STATE_TRASHED)
 418             audio_reset_buffer();
 419         return true;
 420     default:
 421         return false;
 422     }
 423 }
 424
 425 unsigned char *audio_get_buffer(bool talk_buf, size_t *buffer_size)
 426 {
 427     unsigned char *buf, *end;
 428
 429     if (audio_is_initialized)
 430     {
 431         audio_hard_stop();
 432     }
 433     /* else buffer_state will be AUDIOBUF_STATE_TRASHED at this point */
 434
 435     /* Reset the buffering thread so that it doesn't try to use the data */
 436     buffering_reset(filebuf, filebuflen);
 437
 438     if (buffer_size == NULL)
 439     {
 440         /* Special case for talk_init to use since it already knows it's
 441            trashed */
 442         buffer_state = AUDIOBUF_STATE_TRASHED;
 443         return NULL;
 444     }
 445
 446     if (talk_buf || buffer_state == AUDIOBUF_STATE_TRASHED
 447            || !talk_voice_required())
 448     {
 449         logf("get buffer: talk, audio");
 450         /* Ok to use everything from audiobuf to audiobufend - voice is loaded,
 451            the talk buffer is not needed because voice isn't being used, or
 452            could be AUDIOBUF_STATE_TRASHED already. If state is
 453            AUDIOBUF_STATE_VOICED_ONLY, no problem as long as memory isn't written
 454            without the caller knowing what's going on. Changing certain settings
 455            may move it to a worse condition but the memory in use by something
 456            else will remain undisturbed.
 457          */
 458         if (buffer_state != AUDIOBUF_STATE_TRASHED)
 459         {
 460             talk_buffer_steal();
 461             buffer_state = AUDIOBUF_STATE_TRASHED;
 462         }
 463
 464         buf = audiobuf;
 465         end = audiobufend;
 466     }
 467     else
 468     {
 469         /* Safe to just return this if already AUDIOBUF_STATE_VOICED_ONLY or
 470            still AUDIOBUF_STATE_INITIALIZED */
 471         /* Skip talk buffer and move pcm buffer to end to maximize available
 472            contiguous memory - no audio running means voice will not need the
 473            swap space */
 474         logf("get buffer: audio");
 475         buf = audiobuf + talk_get_bufsize();
 476         end = audiobufend - pcmbuf_init(audiobufend);
 477         buffer_state = AUDIOBUF_STATE_VOICED_ONLY;
 478     }
 479
 480     *buffer_size = end - buf;
 481
 482     return buf;
 483 }
 484
 485 int audio_buffer_state(void)
 486 {
 487     return buffer_state;
 488 }
 489
 490 #ifdef HAVE_RECORDING
 491 unsigned char *audio_get_recording_buffer(size_t *buffer_size)
 492 {
 493     /* Stop audio, voice and obtain all available buffer space */
 494     audio_hard_stop();
 495     talk_buffer_steal();
 496
 497     unsigned char *end = audiobufend;
 498     buffer_state = AUDIOBUF_STATE_TRASHED;
 499     *buffer_size = end - audiobuf;
 500
 501     return (unsigned char *)audiobuf;
 502 }
 503
 504 bool audio_load_encoder(int afmt)
 505 {
 506 #ifndef SIMULATOR
 507     const char *enc_fn = get_codec_filename(afmt | CODEC_TYPE_ENCODER);
 508     if (!enc_fn)
 509         return false;
 510
 511     audio_remove_encoder();
 512     ci.enc_codec_loaded = 0; /* clear any previous error condition */
 513
 514     LOGFQUEUE("codec > Q_ENCODER_LOAD_DISK");
 515     queue_post(&codec_queue, Q_ENCODER_LOAD_DISK, (intptr_t)enc_fn);
 516
 517     while (ci.enc_codec_loaded == 0)
 518         yield();
 519
 520     logf("codec loaded: %d", ci.enc_codec_loaded);
 521
 522     return ci.enc_codec_loaded > 0;
 523 #else
 524     (void)afmt;
 525     return true;
 526 #endif
 527 } /* audio_load_encoder */
 528
 529 void audio_remove_encoder(void)
 530 {
 531 #ifndef SIMULATOR
 532     /* force encoder codec unload (if currently loaded) */
 533     if (ci.enc_codec_loaded <= 0)
 534         return;
 535
 536     ci.stop_encoder = true;
 537     while (ci.enc_codec_loaded > 0)
 538         yield();
 539 #endif
 540 } /* audio_remove_encoder */
 541
 542 #endif /* HAVE_RECORDING */
 543
 544 #ifdef HAVE_ALBUMART
 545 int audio_current_aa_hid(void)
 546 {
 547     int cur_idx;
 548     int offset = ci.new_track + wps_offset;
 549
 550     cur_idx = track_ridx + offset;
 551     cur_idx &= MAX_TRACK_MASK;
 552
 553     return tracks[cur_idx].aa_hid;
 554 }
 555 #endif
 556
 557 struct mp3entry* audio_current_track(void)
 558 {
 559     const char *filename;
 560     static struct mp3entry temp_id3;
 561     struct playlist_track_info trackinfo;
 562     int cur_idx;
 563     int offset = ci.new_track + wps_offset;
 564
 565     cur_idx = (track_ridx + offset) & MAX_TRACK_MASK;
 566
 567     if (cur_idx == track_ridx && *thistrack_id3->path)
 568     {
 569         /* The usual case */
 570         return thistrack_id3;
 571     }
 572     else if (automatic_skip && offset == -1 && *othertrack_id3->path)
 573     {
 574         /* We're in a track transition. The codec has moved on to the next track,
 575              but the audio being played is still the same (now previous) track.
 576              othertrack_id3.elapsed is being updated in an ISR by
 577              codec_pcmbuf_position_callback */
 578         return othertrack_id3;
 579     }
 580     else if (tracks[cur_idx].id3_hid >= 0)
 581     {
 582         /* The current track's info has been buffered but not read yet, so get it */
 583         if (bufread(tracks[cur_idx].id3_hid, sizeof(struct mp3entry), &temp_id3)
 584              == sizeof(struct mp3entry))
 585             return &temp_id3;
 586     }
 587
 588     /* We didn't find the ID3 metadata, so we fill temp_id3 with the little info
 589        we have and return that. */
 590
 591     memset(&temp_id3, 0, sizeof(struct mp3entry));
 592
 593     playlist_get_track_info(NULL, playlist_next(0)+wps_offset, &trackinfo);
 594     filename = trackinfo.filename;
 595     if (!filename)
 596         filename = "No file!";
 597
 598 #if defined(HAVE_TC_RAMCACHE) && defined(HAVE_DIRCACHE)
 599     if (tagcache_fill_tags(&temp_id3, filename))
 600         return &temp_id3;
 601 #endif
 602
 603     strncpy(temp_id3.path, filename, sizeof(temp_id3.path)-1);
 604     temp_id3.title = strrchr(temp_id3.path, '/');
 605     if (!temp_id3.title)
 606         temp_id3.title = &temp_id3.path[0];
 607     else
 608         temp_id3.title++;
 609
 610     return &temp_id3;
 611 }
 612
 613 struct mp3entry* audio_next_track(void)
 614 {
 615     int next_idx;
 616     int offset = ci.new_track + wps_offset;
 617
 618     if (!audio_have_tracks())
 619         return NULL;
 620
 621     if (wps_offset == -1 && *thistrack_id3->path)
 622     {
 623         /* We're in a track transition. The next track for the WPS is the one
 624            currently being decoded. */
 625         return thistrack_id3;
 626     }
 627
 628     next_idx = (track_ridx + offset + 1) & MAX_TRACK_MASK;
 629
 630     if (tracks[next_idx].id3_hid >= 0)
 631     {
 632         if (bufread(tracks[next_idx].id3_hid, sizeof(struct mp3entry), othertrack_id3)
 633              == sizeof(struct mp3entry))
 634             return othertrack_id3;
 635         else
 636             return NULL;
 637     }
 638
 639     if (next_idx == track_widx)
 640     {
 641         /* The next track hasn't been buffered yet, so we return the static
 642            version of its metadata. */
 643         return &unbuffered_id3;
 644     }
 645
 646     return NULL;
 647 }
 648
 649 void audio_play(long offset)
 650 {
 651     logf("audio_play");
 652
 653 #ifdef PLAYBACK_VOICE
 654     /* Truncate any existing voice output so we don't have spelling
 655      * etc. over the first part of the played track */
 656     talk_force_shutup();
 657 #endif
 658
 659     /* Start playback */
 660     LOGFQUEUE("audio >| audio Q_AUDIO_PLAY: %ld", offset);
 661     /* Don't return until playback has actually started */
 662     queue_send(&audio_queue, Q_AUDIO_PLAY, offset);
 663 }
 664
 665 void audio_stop(void)
 666 {
 667     /* Stop playback */
 668     LOGFQUEUE("audio >| audio Q_AUDIO_STOP");
 669     /* Don't return until playback has actually stopped */
 670     queue_send(&audio_queue, Q_AUDIO_STOP, 0);
 671 }
 672
 673 void audio_pause(void)
 674 {
 675     LOGFQUEUE("audio >| audio Q_AUDIO_PAUSE");
 676     /* Don't return until playback has actually paused */
 677     queue_send(&audio_queue, Q_AUDIO_PAUSE, true);
 678 }
 679
 680 void audio_resume(void)
 681 {
 682     LOGFQUEUE("audio >| audio Q_AUDIO_PAUSE resume");
 683     /* Don't return until playback has actually resumed */
 684     queue_send(&audio_queue, Q_AUDIO_PAUSE, false);
 685 }
 686
 687 void audio_skip(int direction)
 688 {
 689     if (playlist_check(ci.new_track + wps_offset + direction))
 690     {
 691         if (global_settings.beep)
 692             pcmbuf_beep(2000, 100, 2500*global_settings.beep);
 693
 694         LOGFQUEUE("audio > audio Q_AUDIO_SKIP %d", direction);
 695         queue_post(&audio_queue, Q_AUDIO_SKIP, direction);
 696         /* Update wps while our message travels inside deep playback queues. */
 697         wps_offset += direction;
 698     }
 699     else
 700     {
 701         /* No more tracks. */
 702         if (global_settings.beep)
 703             pcmbuf_beep(1000, 100, 1500*global_settings.beep);
 704     }
 705 }
 706
 707 void audio_next(void)
 708 {
 709     audio_skip(1);
 710 }
 711
 712 void audio_prev(void)
 713 {
 714     audio_skip(-1);
 715 }
 716
 717 void audio_next_dir(void)
 718 {
 719     LOGFQUEUE("audio > audio Q_AUDIO_DIR_SKIP 1");
 720     queue_post(&audio_queue, Q_AUDIO_DIR_SKIP, 1);
 721 }
 722
 723 void audio_prev_dir(void)
 724 {
 725     LOGFQUEUE("audio > audio Q_AUDIO_DIR_SKIP -1");
 726     queue_post(&audio_queue, Q_AUDIO_DIR_SKIP, -1);
 727 }
 728
 729 void audio_pre_ff_rewind(void)
 730 {
 731     LOGFQUEUE("audio > audio Q_AUDIO_PRE_FF_REWIND");
 732     queue_post(&audio_queue, Q_AUDIO_PRE_FF_REWIND, 0);
 733 }
 734
 735 void audio_ff_rewind(long newpos)
 736 {
 737     LOGFQUEUE("audio > audio Q_AUDIO_FF_REWIND");
 738     queue_post(&audio_queue, Q_AUDIO_FF_REWIND, newpos);
 739 }
 740
 741 void audio_flush_and_reload_tracks(void)
 742 {
 743     LOGFQUEUE("audio > audio Q_AUDIO_FLUSH");
 744     queue_post(&audio_queue, Q_AUDIO_FLUSH, 0);
 745 }
 746
 747 void audio_error_clear(void)
 748 {
 749 #ifdef AUDIO_HAVE_RECORDING
 750     pcm_rec_error_clear();
 751 #endif
 752 }
 753
 754 int audio_status(void)
 755 {
 756     int ret = 0;
 757
 758     if (playing)
 759         ret |= AUDIO_STATUS_PLAY;
 760
 761     if (paused)
 762         ret |= AUDIO_STATUS_PAUSE;
 763
 764 #ifdef HAVE_RECORDING
 765     /* Do this here for constitency with mpeg.c version */
 766     ret |= pcm_rec_status();
 767 #endif
 768
 769     return ret;
 770 }
 771
 772 int audio_get_file_pos(void)
 773 {
 774     return 0;
 775 }
 776
 777 #ifdef HAVE_DISK_STORAGE
 778 void audio_set_buffer_margin(int setting)
 779 {
 780     static const int lookup[] = {5, 15, 30, 60, 120, 180, 300, 600};
 781     buffer_margin = lookup[setting];
 782     logf("buffer margin: %ld", (long)buffer_margin);
 783     set_filebuf_watermark();
 784 }
 785 #endif
 786
 787 /* Take necessary steps to enable or disable the crossfade setting */
 788 void audio_set_crossfade(int enable)
 789 {
 790     size_t offset;
 791     bool was_playing;
 792     size_t size;
 793
 794     /* Tell it the next setting to use */
 795     pcmbuf_crossfade_enable(enable);
 796
 797     /* Return if size hasn't changed or this is too early to determine
 798        which in the second case there's no way we could be playing
 799        anything at all */
 800     if (pcmbuf_is_same_size())
 801     {
 802         /* This function is a copout and just syncs some variables -
 803            to be removed at a later date */
 804         pcmbuf_crossfade_enable_finished();
 805         return;
 806     }
 807
 808     offset = 0;
 809     was_playing = playing;
 810
 811     /* Playback has to be stopped before changing the buffer size */
 812     if (was_playing)
 813     {
 814         /* Store the track resume position */
 815         offset = thistrack_id3->offset;
 816     }
 817
 818     /* Blast it - audio buffer will have to be setup again next time
 819        something plays */
 820     audio_get_buffer(true, &size);
 821
 822     /* Restart playback if audio was running previously */
 823     if (was_playing)
 824         audio_play(offset);
 825 }
 826
 827 /* --- Routines called from multiple threads --- */
 828
 829 static void set_filebuf_watermark(void)
 830 {
 831     if (!filebuf)
 832         return;     /* Audio buffers not yet set up */
 833
 834 #ifdef HAVE_FLASH_STORAGE
 835     int seconds = 1;
 836 #else
 837     int seconds;
 838     int spinup = ata_spinup_time();
 839     if (spinup)
 840         seconds = (spinup / HZ) + 1;
 841     else
 842         seconds = 5;
 843 #endif
 844
 845     /* bitrate of last track in buffer dictates watermark */
 846     struct mp3entry* id3 = NULL;
 847     if (tracks[track_widx].taginfo_ready)
 848         id3 = bufgetid3(tracks[track_widx].id3_hid);
 849     else
 850         id3 = bufgetid3(tracks[track_widx-1].id3_hid);
 851     if (!id3) {
 852         logf("fwmark: No id3 for last track (r%d/w%d), aborting!", track_ridx, track_widx);
 853         return;
 854     }
 855     size_t bytes = id3->bitrate * (1000/8) * seconds;
 856     buf_set_watermark(bytes);
 857     logf("fwmark: %d", bytes);
 858 }
 859
 860 const char *get_codec_filename(int cod_spec)
 861 {
 862     const char *fname;
 863
 864 #ifdef HAVE_RECORDING
 865     /* Can choose decoder or encoder if one available */
 866     int type = cod_spec & CODEC_TYPE_MASK;
 867     int afmt = cod_spec & CODEC_AFMT_MASK;
 868
 869     if ((unsigned)afmt >= AFMT_NUM_CODECS)
 870         type = AFMT_UNKNOWN | (type & CODEC_TYPE_MASK);
 871
 872     fname = (type == CODEC_TYPE_ENCODER) ?
 873                 audio_formats[afmt].codec_enc_root_fn :
 874                 audio_formats[afmt].codec_root_fn;
 875
 876     logf("%s: %d - %s",
 877         (type == CODEC_TYPE_ENCODER) ? "Encoder" : "Decoder",
 878         afmt, fname ? fname : "<unknown>");
 879 #else /* !HAVE_RECORDING */
 880     /* Always decoder */
 881     if ((unsigned)cod_spec >= AFMT_NUM_CODECS)
 882         cod_spec = AFMT_UNKNOWN;
 883     fname = audio_formats[cod_spec].codec_root_fn;
 884     logf("Codec: %d - %s",  cod_spec, fname ? fname : "<unknown>");
 885 #endif /* HAVE_RECORDING */
 886
 887     return fname;
 888 } /* get_codec_filename */
 889
 890 /* --- Codec thread --- */
 891 static bool codec_pcmbuf_insert_callback(
 892         const void *ch1, const void *ch2, int count)
 893 {
 894     const char *src[2] = { ch1, ch2 };
 895
 896     while (count > 0)
 897     {
 898         int out_count = dsp_output_count(ci.dsp, count);
 899         int inp_count;
 900         char *dest;
 901
 902         /* Prevent audio from a previous track from playing */
 903         if (ci.new_track || ci.stop_codec)
 904             return true;
 905
 906         while ((dest = pcmbuf_request_buffer(&out_count)) == NULL)
 907         {
 908             cancel_cpu_boost();
 909             sleep(1);
 910             if (ci.seek_time || ci.new_track || ci.stop_codec)
 911                 return true;
 912         }
 913
 914         /* Get the real input_size for output_size bytes, guarding
 915          * against resampling buffer overflows. */
 916         inp_count = dsp_input_count(ci.dsp, out_count);
 917
 918         if (inp_count <= 0)
 919             return true;
 920
 921         /* Input size has grown, no error, just don't write more than length */
 922         if (inp_count > count)
 923             inp_count = count;
 924
 925         out_count = dsp_process(ci.dsp, dest, src, inp_count);
 926
 927         if (out_count <= 0)
 928             return true;
 929
 930         pcmbuf_write_complete(out_count);
 931
 932         count -= inp_count;
 933     }
 934
 935     return true;
 936 } /* codec_pcmbuf_insert_callback */
 937
 938 static void* codec_get_buffer(size_t *size)
 939 {
 940     if (codec_size >= CODEC_SIZE)
 941         return NULL;
 942     *size = CODEC_SIZE - codec_size;
 943     return &codecbuf[codec_size];
 944 }
 945
 946 /* Between the codec and PCM track change, we need to keep updating the
 947    "elapsed" value of the previous (to the codec, but current to the
 948    user/PCM/WPS) track, so that the progressbar reaches the end.
 949    During that transition, the WPS will display prevtrack_id3. */
 950 static void codec_pcmbuf_position_callback(size_t size) ICODE_ATTR;
 951 static void codec_pcmbuf_position_callback(size_t size)
 952 {
 953     /* This is called from an ISR, so be quick */
 954     unsigned int time = size * 1000 / 4 / NATIVE_FREQUENCY +
 955         othertrack_id3->elapsed;
 956
 957     if (time >= othertrack_id3->length)
 958     {
 959         pcmbuf_set_position_callback(NULL);
 960         othertrack_id3->elapsed = othertrack_id3->length;
 961     }
 962     else
 963         othertrack_id3->elapsed = time;
 964 }
 965
 966 static void codec_set_elapsed_callback(unsigned int value)
 967 {
 968     unsigned int latency;
 969     if (ci.seek_time)
 970         return;
 971
 972 #ifdef AB_REPEAT_ENABLE
 973     ab_position_report(value);
 974 #endif
 975
 976     latency = pcmbuf_get_latency();
 977     if (value < latency)
 978         thistrack_id3->elapsed = 0;
 979     else if (value - latency > thistrack_id3->elapsed ||
 980             value - latency < thistrack_id3->elapsed - 2)
 981     {
 982         thistrack_id3->elapsed = value - latency;
 983     }
 984 }
 985
 986 static void codec_set_offset_callback(size_t value)
 987 {
 988     unsigned int latency;
 989
 990     if (ci.seek_time)
 991         return;
 992
 993     latency = pcmbuf_get_latency() * thistrack_id3->bitrate / 8;
 994     if (value < latency)
 995         thistrack_id3->offset = 0;
 996     else
 997         thistrack_id3->offset = value - latency;
 998 }
 999
1000 static void codec_advance_buffer_counters(size_t amount)
1001 {
1002     bufadvance(CUR_TI->audio_hid, amount);
1003     ci.curpos += amount;
1004 }
1005
1006 /* copy up-to size bytes into ptr and return the actual size copied */
1007 static size_t codec_filebuf_callback(void *ptr, size_t size)
1008 {
1009     ssize_t copy_n;
1010
1011     if (ci.stop_codec || !playing)
1012         return 0;
1013
1014     copy_n = bufread(CUR_TI->audio_hid, size, ptr);
1015
1016     /* Nothing requested OR nothing left */
1017     if (copy_n == 0)
1018         return 0;
1019
1020     /* Update read and other position pointers */
1021     codec_advance_buffer_counters(copy_n);
1022
1023     /* Return the actual amount of data copied to the buffer */
1024     return copy_n;
1025 } /* codec_filebuf_callback */
1026
1027 static void* codec_request_buffer_callback(size_t *realsize, size_t reqsize)
1028 {
1029     size_t copy_n = reqsize;
1030     ssize_t ret;
1031     void *ptr;
1032
1033     if (!playing)
1034     {
1035         *realsize = 0;
1036         return NULL;
1037     }
1038
1039     ret = bufgetdata(CUR_TI->audio_hid, reqsize, &ptr);
1040     if (ret >= 0)
1041         copy_n = MIN((size_t)ret, reqsize);
1042
1043     if (copy_n == 0)
1044     {
1045         *realsize = 0;
1046         return NULL;
1047     }
1048
1049     *realsize = copy_n;
1050
1051     return ptr;
1052 } /* codec_request_buffer_callback */
1053
1054 static int get_codec_base_type(int type)
1055 {
1056     switch (type) {
1057         case AFMT_MPA_L1:
1058         case AFMT_MPA_L2:
1059         case AFMT_MPA_L3:
1060             return AFMT_MPA_L3;
1061     }
1062
1063     return type;
1064 }
1065
1066 static void codec_advance_buffer_callback(size_t amount)
1067 {
1068     codec_advance_buffer_counters(amount);
1069     codec_set_offset_callback(ci.curpos);
1070 }
1071
1072 static void codec_advance_buffer_loc_callback(void *ptr)
1073 {
1074     size_t amount = buf_get_offset(CUR_TI->audio_hid, ptr);
1075     codec_advance_buffer_callback(amount);
1076 }
1077
1078 static void codec_seek_complete_callback(void)
1079 {
1080     logf("seek_complete");
1081     if (pcm_is_paused())
1082     {
1083         /* If this is not a seamless seek, clear the buffer */
1084         pcmbuf_play_stop();
1085         dsp_configure(ci.dsp, DSP_FLUSH, 0);
1086
1087         /* If playback was not 'deliberately' paused, unpause now */
1088         if (!paused)
1089             pcmbuf_pause(false);
1090     }
1091     ci.seek_time = 0;
1092 }
1093
1094 static bool codec_seek_buffer_callback(size_t newpos)
1095 {
1096     logf("codec_seek_buffer_callback");
1097
1098     int ret = bufseek(CUR_TI->audio_hid, newpos);
1099     if (ret == 0) {
1100         ci.curpos = newpos;
1101         return true;
1102     }
1103     else {
1104         return false;
1105     }
1106 }
1107
1108 static void codec_configure_callback(int setting, intptr_t value)
1109 {
1110     switch (setting) {
1111     default:
1112         if (!dsp_configure(ci.dsp, setting, value))
1113             { logf("Illegal key:%d", setting); }
1114     }
1115 }
1116
1117 static void codec_track_changed(void)
1118 {
1119     LOGFQUEUE("codec > audio Q_AUDIO_TRACK_CHANGED");
1120     queue_post(&audio_queue, Q_AUDIO_TRACK_CHANGED, 0);
1121 }
1122
1123 static void codec_pcmbuf_track_changed_callback(void)
1124 {
1125     pcmbuf_set_position_callback(NULL);
1126     pcmbuf_callback_queue_post(Q_AUDIO_TRACK_CHANGED, 0);
1127 }
1128
1129 static void codec_discard_codec_callback(void)
1130 {
1131     if (CUR_TI->codec_hid >= 0)
1132     {
1133         bufclose(CUR_TI->codec_hid);
1134         CUR_TI->codec_hid = -1;
1135     }
1136 }
1137
1138 static inline void codec_gapless_track_change(void)
1139 {
1140     /* callback keeps the progress bar moving while the pcmbuf empties */
1141     pcmbuf_set_position_callback(codec_pcmbuf_position_callback);
1142     /* set the pcmbuf callback for when the track really changes */
1143     pcmbuf_set_event_handler(codec_pcmbuf_track_changed_callback);
1144 }
1145
1146 static inline void codec_crossfade_track_change(void)
1147 {
1148     /* Initiate automatic crossfade mode */
1149     pcmbuf_crossfade_init(false);
1150     /* Notify the wps that the track change starts now */
1151     codec_track_changed();
1152 }
1153
1154 static void codec_track_skip_done(bool was_manual)
1155 {
1156     /* Manual track change (always crossfade or flush audio). */
1157     if (was_manual)
1158     {
1159         pcmbuf_crossfade_init(true);
1160         LOGFQUEUE("codec > audio Q_AUDIO_TRACK_CHANGED");
1161         queue_post(&audio_queue, Q_AUDIO_TRACK_CHANGED, 0);
1162     }
1163     /* Automatic track change w/crossfade, if not in "Track Skip Only" mode. */
1164     else if (pcmbuf_is_crossfade_enabled() && !pcmbuf_is_crossfade_active()
1165              && global_settings.crossfade != CROSSFADE_ENABLE_TRACKSKIP)
1166     {
1167         if (global_settings.crossfade == CROSSFADE_ENABLE_SHUFFLE_AND_TRACKSKIP)
1168         {
1169             if (global_settings.playlist_shuffle)
1170                 /* shuffle mode is on, so crossfade: */
1171                 codec_crossfade_track_change();
1172             else
1173                 /* shuffle mode is off, so do a gapless track change */
1174                 codec_gapless_track_change();
1175         }
1176         else
1177             /* normal crossfade:  */
1178             codec_crossfade_track_change();
1179     }
1180     else
1181         /* normal gapless playback. */
1182         codec_gapless_track_change();
1183 }
1184
1185 static bool codec_load_next_track(void)
1186 {
1187     intptr_t result = Q_CODEC_REQUEST_FAILED;
1188
1189     prev_track_elapsed = thistrack_id3->elapsed;
1190
1191 #ifdef AB_REPEAT_ENABLE
1192     ab_end_of_track_report();
1193 #endif
1194
1195     logf("Request new track");
1196
1197     if (ci.new_track == 0)
1198     {
1199         ci.new_track++;
1200         automatic_skip = true;
1201     }
1202
1203     if (!ci.stop_codec)
1204     {
1205         trigger_cpu_boost();
1206         LOGFQUEUE("codec >| audio Q_AUDIO_CHECK_NEW_TRACK");
1207         result = queue_send(&audio_queue, Q_AUDIO_CHECK_NEW_TRACK, 0);
1208     }
1209
1210     switch (result)
1211     {
1212         case Q_CODEC_REQUEST_COMPLETE:
1213             LOGFQUEUE("codec |< Q_CODEC_REQUEST_COMPLETE");
1214             codec_track_skip_done(!automatic_skip);
1215             return true;
1216
1217         case Q_CODEC_REQUEST_FAILED:
1218             LOGFQUEUE("codec |< Q_CODEC_REQUEST_FAILED");
1219             ci.new_track = 0;
1220             ci.stop_codec = true;
1221             codec_requested_stop = true;
1222             return false;
1223
1224         default:
1225             LOGFQUEUE("codec |< default");
1226             ci.stop_codec = true;
1227             codec_requested_stop = true;
1228             return false;
1229     }
1230 }
1231
1232 static bool codec_request_next_track_callback(void)
1233 {
1234     int prev_codectype;
1235
1236     if (ci.stop_codec || !playing)
1237         return false;
1238
1239     prev_codectype = get_codec_base_type(thistrack_id3->codectype);
1240     if (!codec_load_next_track())
1241         return false;
1242
1243     /* Seek to the beginning of the new track because if the struct
1244        mp3entry was buffered, "elapsed" might not be zero (if the track has
1245        been played already but not unbuffered) */
1246     codec_seek_buffer_callback(thistrack_id3->first_frame_offset);
1247     /* Check if the next codec is the same file. */
1248     if (prev_codectype == get_codec_base_type(thistrack_id3->codectype))
1249     {
1250         logf("New track loaded");
1251         codec_discard_codec_callback();
1252         return true;
1253     }
1254     else
1255     {
1256         logf("New codec:%d/%d", thistrack_id3->codectype, prev_codectype);
1257         return false;
1258     }
1259 }
1260
1261 static void codec_thread(void)
1262 {
1263     struct queue_event ev;
1264     int status;
1265
1266     while (1) {
1267         status = 0;
1268
1269         if (!pcmbuf_is_crossfade_active()) {
1270             cancel_cpu_boost();
1271         }
1272
1273         queue_wait(&codec_queue, &ev);
1274         codec_requested_stop = false;
1275
1276         switch (ev.id) {
1277             case Q_CODEC_LOAD_DISK:
1278                 LOGFQUEUE("codec < Q_CODEC_LOAD_DISK");
1279                 queue_reply(&codec_queue, 1);
1280                 audio_codec_loaded = true;
1281                 ci.stop_codec = false;
1282                 status = codec_load_file((const char *)ev.data, &ci);
1283                 LOGFQUEUE("codec_load_file %s %d\n", (const char *)ev.data, status);
1284                 break;
1285
1286             case Q_CODEC_LOAD:
1287                 LOGFQUEUE("codec < Q_CODEC_LOAD");
1288                 if (CUR_TI->codec_hid < 0) {
1289                     logf("Codec slot is empty!");
1290                     /* Wait for the pcm buffer to go empty */
1291                     while (pcm_is_playing())
1292                         yield();
1293                     /* This must be set to prevent an infinite loop */
1294                     ci.stop_codec = true;
1295                     LOGFQUEUE("codec > codec Q_AUDIO_PLAY");
1296                     queue_post(&codec_queue, Q_AUDIO_PLAY, 0);
1297                     break;
1298                 }
1299
1300                 audio_codec_loaded = true;
1301                 ci.stop_codec = false;
1302                 status = codec_load_buf(CUR_TI->codec_hid, &ci);
1303                 LOGFQUEUE("codec_load_buf %d\n", status);
1304                 break;
1305
1306             case Q_CODEC_DO_CALLBACK:
1307                 LOGFQUEUE("codec < Q_CODEC_DO_CALLBACK");
1308                 queue_reply(&codec_queue, 1);
1309                 if ((void*)ev.data != NULL)
1310                 {
1311                     cpucache_invalidate();
1312                     ((void (*)(void))ev.data)();
1313                     cpucache_flush();
1314                 }
1315                 break;
1316
1317 #ifdef AUDIO_HAVE_RECORDING
1318             case Q_ENCODER_LOAD_DISK:
1319                 LOGFQUEUE("codec < Q_ENCODER_LOAD_DISK");
1320                 audio_codec_loaded = false; /* Not audio codec! */
1321                 logf("loading encoder");
1322                 ci.stop_encoder = false;
1323                 status = codec_load_file((const char *)ev.data, &ci);
1324                 logf("encoder stopped");
1325                 break;
1326 #endif /* AUDIO_HAVE_RECORDING */
1327
1328             default:
1329                 LOGFQUEUE("codec < default");
1330         }
1331
1332         if (audio_codec_loaded)
1333         {
1334             if (ci.stop_codec)
1335             {
1336                 status = CODEC_OK;
1337                 if (!playing)
1338                     pcmbuf_play_stop();
1339
1340             }
1341             audio_codec_loaded = false;
1342         }
1343
1344         switch (ev.id) {
1345             case Q_CODEC_LOAD_DISK:
1346             case Q_CODEC_LOAD:
1347                 LOGFQUEUE("codec < Q_CODEC_LOAD");
1348                 if (playing)
1349                 {
1350                     if (ci.new_track || status != CODEC_OK)
1351                     {
1352                         if (!ci.new_track)
1353                         {
1354                             logf("Codec failure, %d %d", ci.new_track, status);
1355                             splash(HZ*2, "Codec failure");
1356                         }
1357
1358                         if (!codec_load_next_track())
1359                         {
1360                             LOGFQUEUE("codec > audio Q_AUDIO_STOP");
1361                             /* End of playlist */
1362                             queue_post(&audio_queue, Q_AUDIO_STOP, 0);
1363                             break;
1364                         }
1365                     }
1366                     else
1367                     {
1368                         logf("Codec finished");
1369                         if (ci.stop_codec)
1370                         {
1371                             /* Wait for the audio to stop playing before
1372                              * triggering the WPS exit */
1373                             while(pcm_is_playing())
1374                             {
1375                                 /* There has been one too many struct pointer swaps by now
1376                                  * so even though it says othertrack_id3, its the correct one! */
1377                                 othertrack_id3->elapsed =
1378                                     othertrack_id3->length - pcmbuf_get_latency();
1379                                 sleep(1);
1380                             }
1381
1382                             if (codec_requested_stop)
1383                             {
1384                                 LOGFQUEUE("codec > audio Q_AUDIO_STOP");
1385                                 queue_post(&audio_queue, Q_AUDIO_STOP, 0);
1386                             }
1387                             break;
1388                         }
1389                     }
1390
1391                     if (CUR_TI->codec_hid >= 0)
1392                     {
1393                         LOGFQUEUE("codec > codec Q_CODEC_LOAD");
1394                         queue_post(&codec_queue, Q_CODEC_LOAD, 0);
1395                     }
1396                     else
1397                     {
1398                         const char *codec_fn =
1399                             get_codec_filename(thistrack_id3->codectype);
1400                         if (codec_fn)
1401                         {
1402                             LOGFQUEUE("codec > codec Q_CODEC_LOAD_DISK");
1403                             queue_post(&codec_queue, Q_CODEC_LOAD_DISK,
1404                                        (intptr_t)codec_fn);
1405                         }
1406                     }
1407                 }
1408                 break;
1409
1410 #ifdef AUDIO_HAVE_RECORDING
1411             case Q_ENCODER_LOAD_DISK:
1412                 LOGFQUEUE("codec < Q_ENCODER_LOAD_DISK");
1413
1414                 if (status == CODEC_OK)
1415                     break;
1416
1417                 logf("Encoder failure");
1418                 splash(HZ*2, "Encoder failure");
1419
1420                 if (ci.enc_codec_loaded < 0)
1421                     break;
1422
1423                 logf("Encoder failed to load");
1424                 ci.enc_codec_loaded = -1;
1425                 break;
1426 #endif /* AUDIO_HAVE_RECORDING */
1427
1428             default:
1429                 LOGFQUEUE("codec < default");
1430
1431         } /* end switch */
1432     }
1433 }
1434
1435 /* Borrow the codec thread and return the ID */
1436 void codec_thread_do_callback(void (*fn)(void), unsigned int *id)
1437 {
1438     /* Set id before telling thread to call something; it may be
1439      * needed before this function returns. */
1440     if (id != NULL)
1441         *id = codec_thread_id;
1442
1443     /* Codec thread will signal just before entering callback */
1444     LOGFQUEUE("codec >| Q_CODEC_DO_CALLBACK");
1445     queue_send(&codec_queue, Q_CODEC_DO_CALLBACK, (intptr_t)fn);
1446 }
1447
1448 /* --- Buffering callbacks --- */
1449
1450 static void buffering_low_buffer_callback(void *data)
1451 {
1452     (void)data;
1453     logf("low buffer callback");
1454
1455     if (filling == STATE_FULL || filling == STATE_END_OF_PLAYLIST) {
1456         /* force a refill */
1457         LOGFQUEUE("buffering > audio Q_AUDIO_FILL_BUFFER");
1458         queue_post(&audio_queue, Q_AUDIO_FILL_BUFFER, 0);
1459     }
1460 }
1461
1462 static void buffering_handle_rebuffer_callback(void *data)
1463 {
1464     (void)data;
1465     LOGFQUEUE("audio >| audio Q_AUDIO_FLUSH");
1466     queue_post(&audio_queue, Q_AUDIO_FLUSH, 0);
1467 }
1468
1469 static void buffering_handle_finished_callback(int *data)
1470 {
1471     logf("handle %d finished buffering", *data);
1472
1473     if (*data == tracks[track_widx].id3_hid)
1474     {
1475         int offset = ci.new_track + wps_offset;
1476         int next_idx = (track_ridx + offset + 1) & MAX_TRACK_MASK;
1477         /* The metadata handle for the last loaded track has been buffered.
1478            We can ask the audio thread to load the rest of the track's data. */
1479         LOGFQUEUE("audio >| audio Q_AUDIO_FINISH_LOAD");
1480         queue_post(&audio_queue, Q_AUDIO_FINISH_LOAD, 0);
1481         if (tracks[next_idx].id3_hid == *data)
1482             send_event(PLAYBACK_EVENT_NEXTTRACKID3_AVAILABLE, NULL);
1483     }
1484     else
1485     {
1486         /* This is most likely an audio handle, so we strip the useless
1487            trailing tags that are left. */
1488         strip_tags(*data);
1489
1490         if (*data == tracks[track_widx-1].audio_hid
1491             && filling == STATE_END_OF_PLAYLIST)
1492         {
1493             /* This was the last track in the playlist.
1494                We now have all the data we need. */
1495             logf("last track finished buffering");
1496             filling = STATE_FINISHED;
1497         }
1498     }
1499 }
1500
1501
1502 /* --- Audio thread --- */
1503
1504 static bool audio_have_tracks(void)
1505 {
1506     return (audio_track_count() != 0);
1507 }
1508
1509 static int audio_free_track_count(void)
1510 {
1511     /* Used tracks + free tracks adds up to MAX_TRACK - 1 */
1512     return MAX_TRACK - 1 - audio_track_count();
1513 }
1514
1515 int audio_track_count(void)
1516 {
1517     /* Calculate difference from track_ridx to track_widx
1518      * taking into account a possible wrap-around. */
1519     return (MAX_TRACK + track_widx - track_ridx) & MAX_TRACK_MASK;
1520 }
1521
1522 long audio_filebufused(void)
1523 {
1524     return (long) buf_used();
1525 }
1526
1527 /* Update track info after successful a codec track change */
1528 static void audio_update_trackinfo(void)
1529 {
1530     /* Load the curent track's metadata into curtrack_id3 */
1531     if (CUR_TI->id3_hid >= 0)
1532         copy_mp3entry(thistrack_id3, bufgetid3(CUR_TI->id3_hid));
1533
1534     /* Reset current position */
1535     thistrack_id3->elapsed = 0;
1536     thistrack_id3->offset = 0;
1537
1538     /* Update the codec API */
1539     ci.filesize = CUR_TI->filesize;
1540     ci.id3 = thistrack_id3;
1541     ci.curpos = 0;
1542     ci.taginfo_ready = &CUR_TI->taginfo_ready;
1543 }
1544
1545 /* Clear tracks between write and read, non inclusive */
1546 static void audio_clear_track_entries(void)
1547 {
1548     int cur_idx = track_widx;
1549
1550     logf("Clearing tracks:%d/%d", track_ridx, track_widx);
1551
1552     /* Loop over all tracks from write-to-read */
1553     while (1)
1554     {
1555         cur_idx = (cur_idx + 1) & MAX_TRACK_MASK;
1556
1557         if (cur_idx == track_ridx)
1558             break;
1559
1560         clear_track_info(&tracks[cur_idx]);
1561     }
1562 }
1563
1564 /* Clear all tracks */
1565 static bool audio_release_tracks(void)
1566 {
1567     int i, cur_idx;
1568
1569     logf("releasing all tracks");
1570
1571     for(i = 0; i < MAX_TRACK; i++)
1572     {
1573         cur_idx = (track_ridx + i) & MAX_TRACK_MASK;
1574         if (!clear_track_info(&tracks[cur_idx]))
1575             return false;
1576     }
1577
1578     return true;
1579 }
1580
1581 static bool audio_loadcodec(bool start_play)
1582 {
1583     int prev_track;
1584     char codec_path[MAX_PATH]; /* Full path to codec */
1585     const struct mp3entry *id3, *prev_id3;
1586
1587     if (tracks[track_widx].id3_hid < 0) {
1588         return false;
1589     }
1590
1591     id3 = bufgetid3(tracks[track_widx].id3_hid);
1592     if (!id3)
1593         return false;
1594
1595     const char *codec_fn = get_codec_filename(id3->codectype);
1596     if (codec_fn == NULL)
1597         return false;
1598
1599     tracks[track_widx].codec_hid = -1;
1600
1601     if (start_play)
1602     {
1603         /* Load the codec directly from disk and save some memory. */
1604         track_ridx = track_widx;
1605         ci.filesize = CUR_TI->filesize;
1606         ci.id3 = thistrack_id3;
1607         ci.taginfo_ready = &CUR_TI->taginfo_ready;
1608         ci.curpos = 0;
1609         LOGFQUEUE("codec > codec Q_CODEC_LOAD_DISK");
1610         queue_post(&codec_queue, Q_CODEC_LOAD_DISK, (intptr_t)codec_fn);
1611         return true;
1612     }
1613     else
1614     {
1615         /* If we already have another track than this one buffered */
1616         if (track_widx != track_ridx)
1617         {
1618             prev_track = (track_widx - 1) & MAX_TRACK_MASK;
1619
1620             id3 = bufgetid3(tracks[track_widx].id3_hid);
1621             prev_id3 = bufgetid3(tracks[prev_track].id3_hid);
1622
1623             /* If the previous codec is the same as this one, there is no need
1624              * to put another copy of it on the file buffer */
1625             if (id3 && prev_id3 &&
1626                 get_codec_base_type(id3->codectype) ==
1627                 get_codec_base_type(prev_id3->codectype)
1628                 && audio_codec_loaded)
1629             {
1630                 logf("Reusing prev. codec");
1631                 return true;
1632             }
1633         }
1634     }
1635
1636     codec_get_full_path(codec_path, codec_fn);
1637
1638     tracks[track_widx].codec_hid = bufopen(codec_path, 0, TYPE_CODEC);
1639     if (tracks[track_widx].codec_hid < 0)
1640         return false;
1641
1642     logf("Loaded codec");
1643
1644     return true;
1645 }
1646
1647 /* Load metadata for the next track (with bufopen). The rest of the track
1648    loading will be handled by audio_finish_load_track once the metadata has been
1649    actually loaded by the buffering thread. */
1650 static bool audio_load_track(size_t offset, bool start_play)
1651 {
1652     const char *trackname;
1653     int fd = -1;
1654
1655     if (track_load_started) {
1656         /* There is already a track load in progress, so track_widx hasn't been
1657            incremented yet. Loading another track would overwrite the one that
1658            hasn't finished loading. */
1659         logf("audio_load_track(): a track load is already in progress");
1660         return false;
1661     }
1662
1663     start_play_g = start_play;  /* will be read by audio_finish_load_track */
1664
1665     /* Stop buffer filling if there is no free track entries.
1666        Don't fill up the last track entry (we wan't to store next track
1667        metadata there). */
1668     if (!audio_free_track_count())
1669     {
1670         logf("No free tracks");
1671         return false;
1672     }
1673
1674     last_peek_offset++;
1675     tracks[track_widx].taginfo_ready = false;
1676
1677     logf("Buffering track:%d/%d", track_widx, track_ridx);
1678     /* Get track name from current playlist read position. */
1679     while ((trackname = playlist_peek(last_peek_offset)) != NULL)
1680     {
1681         /* Handle broken playlists. */
1682         fd = open(trackname, O_RDONLY);
1683         if (fd < 0)
1684         {
1685             logf("Open failed");
1686             /* Skip invalid entry from playlist. */
1687             playlist_skip_entry(NULL, last_peek_offset);
1688         }
1689         else
1690             break;
1691     }
1692
1693     if (!trackname)
1694     {
1695         logf("End-of-playlist");
1696         memset(&unbuffered_id3, 0, sizeof(struct mp3entry));
1697         filling = STATE_END_OF_PLAYLIST;
1698
1699         if (thistrack_id3->length == 0 && thistrack_id3->filesize == 0)
1700         {
1701             /* Stop playback if no valid track was found. */
1702             audio_stop_playback();
1703         }
1704
1705         return false;
1706     }
1707
1708     tracks[track_widx].filesize = filesize(fd);
1709
1710     if (offset > tracks[track_widx].filesize)
1711         offset = 0;
1712
1713     /* Set default values */
1714     if (start_play)
1715     {
1716         buf_set_watermark(filebuflen/2);
1717         dsp_configure(ci.dsp, DSP_RESET, 0);
1718         playlist_update_resume_info(audio_current_track());
1719     }
1720
1721     /* Get track metadata if we don't already have it. */
1722     if (tracks[track_widx].id3_hid < 0)
1723     {
1724         tracks[track_widx].id3_hid = bufopen(trackname, 0, TYPE_ID3);
1725
1726         if (tracks[track_widx].id3_hid < 0)
1727         {
1728             /* Buffer is full. */
1729             get_metadata(&unbuffered_id3, fd, trackname);
1730             last_peek_offset--;
1731             close(fd);
1732             logf("buffer is full for now");
1733             filling = STATE_FULL;
1734             return false;
1735         }
1736
1737         if (track_widx == track_ridx)
1738         {
1739             /* TODO: Superfluos buffering call? */
1740             buf_request_buffer_handle(tracks[track_widx].id3_hid);
1741             struct mp3entry *id3 = bufgetid3(tracks[track_widx].id3_hid);
1742             if (id3)
1743             {
1744                 copy_mp3entry(thistrack_id3, id3);
1745                 thistrack_id3->offset = offset;
1746             }
1747             else
1748                 memset(thistrack_id3, 0, sizeof(struct mp3entry));
1749         }
1750
1751         if (start_play)
1752         {
1753             playlist_update_resume_info(audio_current_track());
1754         }
1755     }
1756
1757     close(fd);
1758     track_load_started = true; /* Remember that we've started loading a track */
1759     return true;
1760 }
1761
1762 /* Second part of the track loading: We now have the metadata available, so we
1763    can load the codec, the album art and finally the audio data.
1764    This is called on the audio thread after the buffering thread calls the
1765    buffering_handle_finished_callback callback. */
1766 static void audio_finish_load_track(void)
1767 {
1768     size_t file_offset = 0;
1769     size_t offset = 0;
1770     bool start_play = start_play_g;
1771
1772     track_load_started = false;
1773
1774     if (tracks[track_widx].id3_hid < 0) {
1775         logf("no metatdata");
1776         return;
1777     }
1778
1779     struct mp3entry *track_id3;
1780
1781     if (track_widx == track_ridx)
1782         track_id3 = thistrack_id3;
1783     else
1784         track_id3 = bufgetid3(tracks[track_widx].id3_hid);
1785
1786     if (track_id3->length == 0 && track_id3->filesize == 0)
1787     {
1788         logf("audio_finish_load_track: invalid metadata");
1789
1790         /* Invalid metadata */
1791         bufclose(tracks[track_widx].id3_hid);
1792         tracks[track_widx].id3_hid = -1;
1793
1794         /* Skip invalid entry from playlist. */
1795         playlist_skip_entry(NULL, last_peek_offset--);
1796
1797         /* load next track */
1798         LOGFQUEUE("audio > audio Q_AUDIO_FILL_BUFFER %d", (int)start_play);
1799         queue_post(&audio_queue, Q_AUDIO_FILL_BUFFER, start_play);
1800
1801         return;
1802     }
1803
1804 #ifdef HAVE_ALBUMART
1805     if (tracks[track_widx].aa_hid < 0 && gui_sync_wps_uses_albumart())
1806     {
1807         char aa_path[MAX_PATH];
1808         if (find_albumart(track_id3, aa_path, sizeof(aa_path)))
1809         {
1810             tracks[track_widx].aa_hid = bufopen(aa_path, 0, TYPE_BITMAP);
1811
1812             if(tracks[track_widx].aa_hid == ERR_BUFFER_FULL)
1813             {
1814                 filling = STATE_FULL;
1815                 logf("buffer is full for now");
1816                 return;  /* No space for track's album art, not an error */
1817             }
1818             else if (tracks[track_widx].aa_hid < 0)
1819             {
1820                 /* another error, ignore AlbumArt */
1821                 logf("Album art loading failed");
1822             }
1823         }
1824     }
1825 #endif
1826
1827     /* Load the codec. */
1828     if (!audio_loadcodec(start_play))
1829     {
1830         if (tracks[track_widx].codec_hid == ERR_BUFFER_FULL)
1831         {
1832             /* No space for codec on buffer, not an error */
1833             filling = STATE_FULL;
1834             return;
1835         }
1836
1837         /* This is an error condition, either no codec was found, or reading
1838          * the codec file failed part way through, either way, skip the track */
1839         /* FIXME: We should not use splashf from audio thread! */
1840         splashf(HZ*2, "No codec for: %s", track_id3->path);
1841         /* Skip invalid entry from playlist. */
1842         playlist_skip_entry(NULL, last_peek_offset);
1843         return;
1844     }
1845
1846     track_id3->elapsed = 0;
1847     offset = track_id3->offset;
1848
1849     enum data_type type = TYPE_PACKET_AUDIO;
1850
1851     switch (track_id3->codectype) {
1852     case AFMT_MPA_L1:
1853     case AFMT_MPA_L2:
1854     case AFMT_MPA_L3:
1855         if (offset > 0) {
1856             file_offset = offset;
1857             track_id3->offset = offset;
1858         }
1859         break;
1860
1861     case AFMT_WAVPACK:
1862         if (offset > 0) {
1863             file_offset = offset;
1864             track_id3->offset = offset;
1865             track_id3->elapsed = track_id3->length / 2;
1866         }
1867         break;
1868
1869     case AFMT_OGG_VORBIS:
1870     case AFMT_SPEEX:
1871     case AFMT_FLAC:
1872     case AFMT_PCM_WAV:
1873     case AFMT_A52:
1874     case AFMT_AAC:
1875     case AFMT_MPC:
1876     case AFMT_APE:
1877     case AFMT_WMA:
1878         if (offset > 0)
1879             track_id3->offset = offset;
1880         break;
1881
1882     case AFMT_NSF:
1883     case AFMT_SPC:
1884     case AFMT_SID:
1885         logf("Loading atomic %d",track_id3->codectype);
1886         type = TYPE_ATOMIC_AUDIO;
1887         break;
1888     }
1889
1890     logf("alt:%s", track_id3->path);
1891
1892     if (file_offset > AUDIO_REBUFFER_GUESS_SIZE)
1893         file_offset -= AUDIO_REBUFFER_GUESS_SIZE;
1894     else if (track_id3->first_frame_offset)
1895         file_offset = track_id3->first_frame_offset;
1896     else
1897         file_offset = 0;
1898
1899     tracks[track_widx].audio_hid = bufopen(track_id3->path, file_offset, type);
1900
1901     /* No space left, not an error */
1902     if (tracks[track_widx].audio_hid == ERR_BUFFER_FULL)
1903     {
1904         filling = STATE_FULL;
1905         logf("buffer is full for now");
1906         return;
1907     }
1908     else if (tracks[track_widx].audio_hid < 0)
1909     {
1910         /* another error, do not continue either */
1911         logf("Could not add audio data handle");
1912         return;
1913     }
1914
1915     /* All required data is now available for the codec. */
1916     tracks[track_widx].taginfo_ready = true;
1917
1918     if (start_play)
1919     {
1920         ci.curpos=file_offset;
1921         buf_request_buffer_handle(tracks[track_widx].audio_hid);
1922     }
1923
1924     track_widx = (track_widx + 1) & MAX_TRACK_MASK;
1925
1926     send_event(PLAYBACK_EVENT_TRACK_BUFFER, track_id3);
1927
1928     /* load next track */
1929     LOGFQUEUE("audio > audio Q_AUDIO_FILL_BUFFER");
1930     queue_post(&audio_queue, Q_AUDIO_FILL_BUFFER, 0);
1931
1932     return;
1933 }
1934
1935 static void audio_fill_file_buffer(bool start_play, size_t offset)
1936 {
1937     filling = STATE_FILLING;
1938     trigger_cpu_boost();
1939
1940     /* No need to rebuffer if there are track skips pending. */
1941     if (ci.new_track != 0)
1942         return;
1943
1944     /* Must reset the buffer before use if trashed or voice only - voice
1945        file size shouldn't have changed so we can go straight from
1946        AUDIOBUF_STATE_VOICED_ONLY to AUDIOBUF_STATE_INITIALIZED */
1947     if (buffer_state != AUDIOBUF_STATE_INITIALIZED)
1948         audio_reset_buffer();
1949
1950     logf("Starting buffer fill");
1951
1952     if (!start_play)
1953         audio_clear_track_entries();
1954
1955     /* Save the current resume position once. */
1956     playlist_update_resume_info(audio_current_track());
1957
1958     audio_load_track(offset, start_play);
1959 }
1960
1961 static void audio_rebuffer(void)
1962 {
1963     logf("Forcing rebuffer");
1964
1965     clear_track_info(CUR_TI);
1966
1967     /* Reset track pointers */
1968     track_widx = track_ridx;
1969     audio_clear_track_entries();
1970
1971     /* Reset a possibly interrupted track load */
1972     track_load_started = false;
1973
1974     /* Fill the buffer */
1975     last_peek_offset = -1;
1976     ci.curpos = 0;
1977
1978     if (!CUR_TI->taginfo_ready)
1979         memset(thistrack_id3, 0, sizeof(struct mp3entry));
1980
1981     audio_fill_file_buffer(false, 0);
1982 }
1983
1984 /* Called on request from the codec to get a new track. This is the codec part
1985    of the track transition. */
1986 static int audio_check_new_track(void)
1987 {
1988     int track_count = audio_track_count();
1989     int old_track_ridx = track_ridx;
1990     int i, idx;
1991     bool forward;
1992     struct mp3entry *temp = thistrack_id3;
1993
1994     /* Now it's good time to send track finish events. */
1995     send_event(PLAYBACK_EVENT_TRACK_FINISH, thistrack_id3);
1996     /* swap the mp3entry pointers */
1997     thistrack_id3 = othertrack_id3;
1998     othertrack_id3 = temp;
1999     ci.id3 = thistrack_id3;
2000     memset(thistrack_id3, 0, sizeof(struct mp3entry));
2001
2002     if (dir_skip)
2003     {
2004         dir_skip = false;
2005         /* regardless of the return value we need to rebuffer.
2006            if it fails the old playlist will resume, else the
2007            next dir will start playing */
2008         playlist_next_dir(ci.new_track);
2009         ci.new_track = 0;
2010         audio_rebuffer();
2011         goto skip_done;
2012     }
2013
2014     if (new_playlist)
2015         ci.new_track = 0;
2016
2017     /* If the playlist isn't that big */
2018     if (automatic_skip)
2019     {
2020         while (!playlist_check(ci.new_track))
2021         {
2022             if (ci.new_track >= 0)
2023             {
2024                 LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_FAILED");
2025                 return Q_CODEC_REQUEST_FAILED;
2026             }
2027             ci.new_track++;
2028         }
2029     }
2030
2031     /* Update the playlist */
2032     last_peek_offset -= ci.new_track;
2033
2034     if (playlist_next(ci.new_track) < 0)
2035     {
2036         LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_FAILED");
2037         return Q_CODEC_REQUEST_FAILED;
2038     }
2039
2040     if (new_playlist)
2041     {
2042         ci.new_track = 1;
2043         new_playlist = false;
2044     }
2045
2046     /* Save a pointer to the old track to allow later clearing */
2047     prev_ti = CUR_TI;
2048
2049     for (i = 0; i < ci.new_track; i++)
2050     {
2051         idx = (track_ridx + i) & MAX_TRACK_MASK;
2052         struct mp3entry *id3 = bufgetid3(tracks[idx].id3_hid);
2053         ssize_t offset = buf_handle_offset(tracks[idx].audio_hid);
2054         if (!id3 || offset < 0 || (unsigned)offset > id3->first_frame_offset)
2055         {
2056             /* We don't have all the audio data for that track, so clear it,
2057                but keep the metadata. */
2058             if (tracks[idx].audio_hid >= 0 && bufclose(tracks[idx].audio_hid))
2059             {
2060                 tracks[idx].audio_hid = -1;
2061                 tracks[idx].filesize = 0;
2062             }
2063         }
2064     }
2065
2066     /* Move to the new track */
2067     track_ridx = (track_ridx + ci.new_track) & MAX_TRACK_MASK;
2068
2069     buf_set_base_handle(CUR_TI->audio_hid);
2070
2071     if (automatic_skip)
2072     {
2073         wps_offset = -ci.new_track;
2074     }
2075
2076     /* If it is not safe to even skip this many track entries */
2077     if (ci.new_track >= track_count || ci.new_track <= track_count - MAX_TRACK)
2078     {
2079         ci.new_track = 0;
2080         audio_rebuffer();
2081         goto skip_done;
2082     }
2083
2084     forward = ci.new_track > 0;
2085     ci.new_track = 0;
2086
2087     /* If the target track is clearly not in memory */
2088     if (CUR_TI->filesize == 0 || !CUR_TI->taginfo_ready)
2089     {
2090         audio_rebuffer();
2091         goto skip_done;
2092     }
2093
2094     /* When skipping backwards, it is possible that we've found a track that's
2095      * buffered, but which is around the track-wrap and therefore not the track
2096      * we are looking for */
2097     if (!forward)
2098     {
2099         int cur_idx = track_ridx;
2100         bool taginfo_ready = true;
2101         /* We've wrapped the buffer backwards if new > old */
2102         bool wrap = track_ridx > old_track_ridx;
2103
2104         while (1)
2105         {
2106             cur_idx = (cur_idx + 1) & MAX_TRACK_MASK;
2107
2108             /* if we've advanced past the wrap when cur_idx is zeroed */
2109             if (!cur_idx)
2110                 wrap = false;
2111
2112             /* if we aren't still on the wrap and we've caught the old track */
2113             if (!(wrap || cur_idx < old_track_ridx))
2114                 break;
2115
2116             /* If we hit a track in between without valid tag info, bail */
2117             if (!tracks[cur_idx].taginfo_ready)
2118             {
2119                 taginfo_ready = false;
2120                 break;
2121             }
2122         }
2123         if (!taginfo_ready)
2124         {
2125             audio_rebuffer();
2126         }
2127     }
2128
2129 skip_done:
2130     audio_update_trackinfo();
2131     LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_COMPLETE");
2132     return Q_CODEC_REQUEST_COMPLETE;
2133 }
2134
2135 unsigned long audio_prev_elapsed(void)
2136 {
2137     return prev_track_elapsed;
2138 }
2139
2140 static void audio_stop_codec_flush(void)
2141 {
2142     ci.stop_codec = true;
2143     pcmbuf_pause(true);
2144
2145     while (audio_codec_loaded)
2146         yield();
2147
2148     /* If the audio codec is not loaded any more, and the audio is still
2149      * playing, it is now and _only_ now safe to call this function from the
2150      * audio thread */
2151     if (pcm_is_playing())
2152     {
2153         pcmbuf_play_stop();
2154         pcmbuf_queue_clear();
2155     }
2156     pcmbuf_pause(paused);
2157 }
2158
2159 static void audio_stop_playback(void)
2160 {
2161     /* If we were playing, save resume information */
2162     if (playing)
2163     {
2164         struct mp3entry *id3 = NULL;
2165
2166         if (!ci.stop_codec)
2167         {
2168             /* Set this early, the outside code yields and may allow the codec
2169                to try to wait for a reply on a buffer wait */
2170             ci.stop_codec = true;
2171             id3 = audio_current_track();
2172         }
2173
2174         /* Save the current playing spot, or NULL if the playlist has ended */
2175         playlist_update_resume_info(id3);
2176
2177         /* TODO: Create auto bookmark too? */
2178
2179         prev_track_elapsed = othertrack_id3->elapsed;
2180
2181         remove_event(BUFFER_EVENT_BUFFER_LOW, buffering_low_buffer_callback);
2182     }
2183
2184     audio_stop_codec_flush();
2185     paused = false;
2186     playing = false;
2187     track_load_started = false;
2188
2189     filling = STATE_IDLE;
2190
2191     /* Mark all entries null. */
2192     audio_clear_track_entries();
2193
2194     /* Close all tracks */
2195     audio_release_tracks();
2196 }
2197
2198 static void audio_play_start(size_t offset)
2199 {
2200     int i;
2201
2202 #if INPUT_SRC_CAPS != 0
2203     audio_set_input_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK);
2204     audio_set_output_source(AUDIO_SRC_PLAYBACK);
2205 #endif
2206
2207     /* Wait for any previously playing audio to flush - TODO: Not necessary? */
2208     paused = false;
2209     audio_stop_codec_flush();
2210
2211     playing = true;
2212     track_load_started = false;
2213
2214     ci.new_track = 0;
2215     ci.seek_time = 0;
2216     wps_offset = 0;
2217
2218     sound_set_volume(global_settings.volume);
2219     track_widx = track_ridx = 0;
2220
2221     /* Clear all track entries. */
2222     for (i = 0; i < MAX_TRACK; i++) {
2223         clear_track_info(&tracks[i]);
2224     }
2225
2226     last_peek_offset = -1;
2227
2228     /* Officially playing */
2229     queue_reply(&audio_queue, 1);
2230
2231     audio_fill_file_buffer(true, offset);
2232
2233     add_event(BUFFER_EVENT_BUFFER_LOW, false, buffering_low_buffer_callback);
2234
2235     LOGFQUEUE("audio > audio Q_AUDIO_TRACK_CHANGED");
2236     queue_post(&audio_queue, Q_AUDIO_TRACK_CHANGED, 0);
2237 }
2238
2239
2240 /* Invalidates all but currently playing track. */
2241 static void audio_invalidate_tracks(void)
2242 {
2243     if (audio_have_tracks())
2244     {
2245         last_peek_offset = 0;
2246         track_widx = track_ridx;
2247
2248         /* Mark all other entries null (also buffered wrong metadata). */
2249         audio_clear_track_entries();
2250
2251         track_widx = (track_widx + 1) & MAX_TRACK_MASK;
2252
2253         audio_fill_file_buffer(false, 0);
2254     }
2255 }
2256
2257 static void audio_new_playlist(void)
2258 {
2259     /* Prepare to start a new fill from the beginning of the playlist */
2260     last_peek_offset = -1;
2261     if (audio_have_tracks())
2262     {
2263         if (paused)
2264             skipped_during_pause = true;
2265         track_widx = track_ridx;
2266         audio_clear_track_entries();
2267
2268         track_widx = (track_widx + 1) & MAX_TRACK_MASK;
2269
2270         /* Mark the current track as invalid to prevent skipping back to it */
2271         CUR_TI->taginfo_ready = false;
2272     }
2273
2274     /* Signal the codec to initiate a track change forward */
2275     new_playlist = true;
2276     ci.new_track = 1;
2277
2278     /* Officially playing */
2279     queue_reply(&audio_queue, 1);
2280
2281     audio_fill_file_buffer(false, 0);
2282 }
2283
2284 /* Called on manual track skip */
2285 static void audio_initiate_track_change(long direction)
2286 {
2287     logf("audio_initiate_track_change(%ld)", direction);
2288
2289     ci.new_track += direction;
2290     wps_offset -= direction;
2291     if (paused)
2292         skipped_during_pause = true;
2293 }
2294
2295 /* Called on manual dir skip */
2296 static void audio_initiate_dir_change(long direction)
2297 {
2298     dir_skip = true;
2299     ci.new_track = direction;
2300     if (paused)
2301         skipped_during_pause = true;
2302 }
2303
2304 /* Called when PCM track change is complete */
2305 static void audio_finalise_track_change(void)
2306 {
2307     logf("audio_finalise_track_change");
2308
2309     if (automatic_skip)
2310     {
2311         wps_offset = 0;
2312         automatic_skip = false;
2313
2314         /* Invalidate prevtrack_id3 */
2315         memset(othertrack_id3, 0, sizeof(struct mp3entry));
2316
2317         if (prev_ti && prev_ti->audio_hid < 0)
2318         {
2319             /* No audio left so we clear all the track info. */
2320             clear_track_info(prev_ti);
2321         }
2322     }
2323     send_event(PLAYBACK_EVENT_TRACK_CHANGE, thistrack_id3);
2324     playlist_update_resume_info(audio_current_track());
2325 }
2326
2327 /*
2328  * Layout audio buffer as follows - iram buffer depends on target:
2329  * [|SWAP:iram][|TALK]|FILE|GUARD|PCM|[SWAP:dram[|iram]|]
2330  */
2331 static void audio_reset_buffer(void)
2332 {
2333     /* see audio_get_recording_buffer if this is modified */
2334     logf("audio_reset_buffer");
2335
2336     /* If the setup of anything allocated before the file buffer is
2337        changed, do check the adjustments after the buffer_alloc call
2338        as it will likely be affected and need sliding over */
2339
2340     /* Initially set up file buffer as all space available */
2341     malloc_buf = audiobuf + talk_get_bufsize();
2342     /* Align the malloc buf to line size. Especially important to cf
2343        targets that do line reads/writes. */
2344     malloc_buf = (unsigned char *)(((uintptr_t)malloc_buf + 15) & ~15);
2345     filebuf    = malloc_buf; /* filebuf line align implied */
2346     filebuflen = audiobufend - filebuf;
2347
2348     filebuflen &= ~15;
2349
2350     /* Subtract whatever the pcm buffer says it used plus the guard buffer */
2351     const size_t pcmbuf_size = pcmbuf_init(filebuf + filebuflen) +GUARD_BUFSIZE;
2352
2353 #ifdef DEBUG
2354     if(pcmbuf_size > filebuflen)
2355         panicf("Not enough memory for pcmbuf_init() : %d > %d",
2356                 (int)pcmbuf_size, (int)filebuflen);
2357 #endif
2358
2359     filebuflen -= pcmbuf_size;
2360
2361     /* Make sure filebuflen is a longword multiple after adjustment - filebuf
2362        will already be line aligned */
2363     filebuflen &= ~3;
2364
2365     buffering_reset(filebuf, filebuflen);
2366
2367     /* Clear any references to the file buffer */
2368     buffer_state = AUDIOBUF_STATE_INITIALIZED;
2369
2370 #if defined(ROCKBOX_HAS_LOGF) && defined(LOGF_ENABLE)
2371     /* Make sure everything adds up - yes, some info is a bit redundant but
2372        aids viewing and the sumation of certain variables should add up to
2373        the location of others. */
2374     {
2375         size_t pcmbufsize;
2376         const unsigned char *pcmbuf = pcmbuf_get_meminfo(&pcmbufsize);
2377         logf("mabuf:  %08X", (unsigned)malloc_buf);
2378         logf("fbuf:   %08X", (unsigned)filebuf);
2379         logf("fbufe:  %08X", (unsigned)(filebuf + filebuflen));
2380         logf("gbuf:   %08X", (unsigned)(filebuf + filebuflen));
2381         logf("gbufe:  %08X", (unsigned)(filebuf + filebuflen + GUARD_BUFSIZE));
2382         logf("pcmb:   %08X", (unsigned)pcmbuf);
2383         logf("pcmbe:  %08X", (unsigned)(pcmbuf + pcmbufsize));
2384     }
2385 #endif
2386 }
2387
2388 static void audio_thread(void)
2389 {
2390     struct queue_event ev;
2391
2392     pcm_postinit();
2393
2394     audio_thread_ready = true;
2395
2396     while (1)
2397     {
2398         if (filling != STATE_FILLING) {
2399             /* End of buffering, let's calculate the watermark and unboost */
2400             set_filebuf_watermark();
2401             cancel_cpu_boost();
2402         }
2403
2404         if (!pcmbuf_queue_scan(&ev))
2405             queue_wait_w_tmo(&audio_queue, &ev, HZ/2);
2406
2407         switch (ev.id) {
2408
2409             case Q_AUDIO_FILL_BUFFER:
2410                 LOGFQUEUE("audio < Q_AUDIO_FILL_BUFFER %d", (int)ev.data);
2411                 audio_fill_file_buffer((bool)ev.data, 0);
2412                 break;
2413
2414             case Q_AUDIO_FINISH_LOAD:
2415                 LOGFQUEUE("audio < Q_AUDIO_FINISH_LOAD");
2416                 audio_finish_load_track();
2417                 break;
2418
2419             case Q_AUDIO_PLAY:
2420                 LOGFQUEUE("audio < Q_AUDIO_PLAY");
2421                 if (playing && ev.data <= 0)
2422                     audio_new_playlist();
2423                 else
2424                 {
2425                     audio_stop_playback();
2426                     audio_play_start((size_t)ev.data);
2427                 }
2428                 break;
2429
2430             case Q_AUDIO_STOP:
2431                 LOGFQUEUE("audio < Q_AUDIO_STOP");
2432                 if (playing)
2433                     audio_stop_playback();
2434                 if (ev.data != 0)
2435                     queue_clear(&audio_queue);
2436                 break;
2437
2438             case Q_AUDIO_PAUSE:
2439                 LOGFQUEUE("audio < Q_AUDIO_PAUSE");
2440                 if (!(bool) ev.data && skipped_during_pause && !pcmbuf_is_crossfade_active())
2441                     pcmbuf_play_stop(); /* Flush old track on resume after skip */
2442                 skipped_during_pause = false;
2443                 if (!playing)
2444                     break;
2445                 pcmbuf_pause((bool)ev.data);
2446                 paused = (bool)ev.data;
2447                 break;
2448
2449             case Q_AUDIO_SKIP:
2450                 LOGFQUEUE("audio < Q_AUDIO_SKIP");
2451                 audio_initiate_track_change((long)ev.data);
2452                 break;
2453
2454             case Q_AUDIO_PRE_FF_REWIND:
2455                 LOGFQUEUE("audio < Q_AUDIO_PRE_FF_REWIND");
2456                 if (!playing)
2457                     break;
2458                 pcmbuf_pause(true);
2459                 break;
2460
2461             case Q_AUDIO_FF_REWIND:
2462                 LOGFQUEUE("audio < Q_AUDIO_FF_REWIND");
2463                 if (!playing)
2464                     break;
2465                 if (automatic_skip)
2466                 {
2467                     /* An automatic track skip is in progress. Finalize it,
2468                        then go back to the previous track */
2469                     audio_finalise_track_change();
2470                     ci.new_track = -1;
2471                 }
2472                 ci.seek_time = (long)ev.data+1;
2473                 break;
2474
2475             case Q_AUDIO_CHECK_NEW_TRACK:
2476                 LOGFQUEUE("audio < Q_AUDIO_CHECK_NEW_TRACK");
2477                 queue_reply(&audio_queue, audio_check_new_track());
2478                 break;
2479
2480             case Q_AUDIO_DIR_SKIP:
2481                 LOGFQUEUE("audio < Q_AUDIO_DIR_SKIP");
2482                 audio_initiate_dir_change(ev.data);
2483                 break;
2484
2485             case Q_AUDIO_FLUSH:
2486                 LOGFQUEUE("audio < Q_AUDIO_FLUSH");
2487                 audio_invalidate_tracks();
2488                 break;
2489
2490             case Q_AUDIO_TRACK_CHANGED:
2491                 /* PCM track change done */
2492                 LOGFQUEUE("audio < Q_AUDIO_TRACK_CHANGED");
2493                 audio_finalise_track_change();
2494                 break;
2495
2496 #ifndef SIMULATOR
2497             case SYS_USB_CONNECTED:
2498                 LOGFQUEUE("audio < SYS_USB_CONNECTED");
2499                 if (playing)
2500                     audio_stop_playback();
2501 #ifdef PLAYBACK_VOICE
2502                 voice_stop();
2503 #endif
2504                 usb_acknowledge(SYS_USB_CONNECTED_ACK);
2505                 usb_wait_for_disconnect(&audio_queue);
2506
2507                 /* Mark all entries null. */
2508                 audio_clear_track_entries();
2509
2510                 /* release tracks to make sure all handles are closed */
2511                 audio_release_tracks();
2512                 break;
2513 #endif
2514
2515             case SYS_TIMEOUT:
2516                 LOGFQUEUE_SYS_TIMEOUT("audio < SYS_TIMEOUT");
2517                 break;
2518
2519             default:
2520                 LOGFQUEUE("audio < default");
2521                 break;
2522         } /* end switch */
2523     } /* end while */
2524 }
2525
2526 /* Initialize the audio system - called from init() in main.c.
2527  * Last function because of all the references to internal symbols
2528  */
2529 void audio_init(void)
2530 {
2531     unsigned int audio_thread_id;
2532
2533     /* Can never do this twice */
2534     if (audio_is_initialized)
2535     {
2536         logf("audio: already initialized");
2537         return;
2538     }
2539
2540     logf("audio: initializing");
2541
2542     /* Initialize queues before giving control elsewhere in case it likes
2543        to send messages. Thread creation will be delayed however so nothing
2544        starts running until ready if something yields such as talk_init. */
2545     queue_init(&audio_queue, true);
2546     queue_init(&codec_queue, false);
2547     queue_init(&pcmbuf_queue, false);
2548
2549     pcm_init();
2550
2551      /* Initialize codec api. */
2552     ci.read_filebuf        = codec_filebuf_callback;
2553     ci.pcmbuf_insert       = codec_pcmbuf_insert_callback;
2554     ci.codec_get_buffer    = codec_get_buffer;
2555     ci.request_buffer      = codec_request_buffer_callback;
2556     ci.advance_buffer      = codec_advance_buffer_callback;
2557     ci.advance_buffer_loc  = codec_advance_buffer_loc_callback;
2558     ci.request_next_track  = codec_request_next_track_callback;
2559     ci.seek_buffer         = codec_seek_buffer_callback;
2560     ci.seek_complete       = codec_seek_complete_callback;
2561     ci.set_elapsed         = codec_set_elapsed_callback;
2562     ci.set_offset          = codec_set_offset_callback;
2563     ci.configure           = codec_configure_callback;
2564     ci.discard_codec       = codec_discard_codec_callback;
2565     ci.dsp                 = (struct dsp_config *)dsp_configure(NULL, DSP_MYDSP,
2566                                                                 CODEC_IDX_AUDIO);
2567
2568     thistrack_id3 = &mp3entry_buf[0];
2569     othertrack_id3 = &mp3entry_buf[1];
2570
2571     /* initialize the buffer */
2572     filebuf = audiobuf;
2573
2574     /* audio_reset_buffer must to know the size of voice buffer so init
2575        talk first */
2576     talk_init();
2577
2578     codec_thread_id = create_thread(
2579             codec_thread, codec_stack, sizeof(codec_stack),
2580             CREATE_THREAD_FROZEN,
2581             codec_thread_name IF_PRIO(, PRIORITY_PLAYBACK)
2582             IF_COP(, CPU));
2583
2584     queue_enable_queue_send(&codec_queue, &codec_queue_sender_list,
2585                             codec_thread_id);
2586
2587     audio_thread_id = create_thread(audio_thread, audio_stack,
2588                   sizeof(audio_stack), CREATE_THREAD_FROZEN,
2589                   audio_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE)
2590                   IF_COP(, CPU));
2591
2592     queue_enable_queue_send(&audio_queue, &audio_queue_sender_list,
2593                             audio_thread_id);
2594
2595 #ifdef PLAYBACK_VOICE
2596     voice_thread_init();
2597 #endif
2598
2599     /* Set crossfade setting for next buffer init which should be about... */
2600     pcmbuf_crossfade_enable(global_settings.crossfade);
2601
2602     /* initialize the buffering system */
2603
2604     buffering_init();
2605     /* ...now! Set up the buffers */
2606     audio_reset_buffer();
2607
2608     int i;
2609     for(i = 0; i < MAX_TRACK; i++)
2610     {
2611         tracks[i].audio_hid = -1;
2612         tracks[i].id3_hid = -1;
2613         tracks[i].codec_hid = -1;
2614 #ifdef HAVE_ALBUMART
2615         tracks[i].aa_hid = -1;
2616 #endif
2617     }
2618
2619     add_event(BUFFER_EVENT_REBUFFER, false, buffering_handle_rebuffer_callback);
2620     add_event(BUFFER_EVENT_FINISHED, false, buffering_handle_finished_callback);
2621
2622     /* Probably safe to say */
2623     audio_is_initialized = true;
2624
2625     sound_settings_apply();
2626 #ifdef HAVE_DISK_STORAGE
2627     audio_set_buffer_margin(global_settings.buffer_margin);
2628 #endif
2629
2630     /* it's safe to let the threads run now */
2631 #ifdef PLAYBACK_VOICE
2632     voice_thread_resume();
2633 #endif
2634     thread_thaw(codec_thread_id);
2635     thread_thaw(audio_thread_id);
2636
2637 } /* audio_init */
2638
2639 bool audio_is_thread_ready(void)
2640 {
2641     return audio_thread_ready;
2642 }