apps/playback.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Miika Pekkarinen
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19
  20 /* TODO: Can use the track changed callback to detect end of track and seek
  21  * in the previous track until this happens */
  22 /* Design: we have prev_ti already, have a conditional for what type of seek
  23  * to do on a seek request, if it is a previous track seek, skip previous,
  24  * and in the request_next_track callback set the offset up the same way that
  25  * starting from an offset works. */
  26 /* TODO: Pause should be handled in here, rather than PCMBUF so that voice can
  27  * play whilst audio is paused */
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <ctype.h>
  33
  34 #include "system.h"
  35 #include "thread.h"
  36 #include "file.h"
  37 #include "panic.h"
  38 #include "memory.h"
  39 #include "lcd.h"
  40 #include "font.h"
  41 #include "button.h"
  42 #include "kernel.h"
  43 #include "tree.h"
  44 #include "debug.h"
  45 #include "sprintf.h"
  46 #include "settings.h"
  47 #include "codecs.h"
  48 #include "audio.h"
  49 #include "logf.h"
  50 #include "mp3_playback.h"
  51 #include "usb.h"
  52 #include "status.h"
  53 #include "ata.h"
  54 #include "screens.h"
  55 #include "playlist.h"
  56 #include "playback.h"
  57 #include "pcmbuf.h"
  58 #include "buffer.h"
  59 #include "dsp.h"
  60 #include "abrepeat.h"
  61 #include "cuesheet.h"
  62 #ifdef HAVE_TAGCACHE
  63 #include "tagcache.h"
  64 #endif
  65 #ifdef HAVE_LCD_BITMAP
  66 #include "icons.h"
  67 #include "peakmeter.h"
  68 #include "action.h"
  69 #endif
  70 #include "lang.h"
  71 #include "bookmark.h"
  72 #include "misc.h"
  73 #include "sound.h"
  74 #include "metadata.h"
  75 #include "splash.h"
  76 #include "talk.h"
  77 #include "ata_idle_notify.h"
  78
  79 #ifdef HAVE_RECORDING
  80 #include "recording.h"
  81 #include "talk.h"
  82 #endif
  83
  84 #ifdef HAVE_WM8758
  85 #include "menus/eq_menu.h"
  86 #endif
  87
  88 #define PLAYBACK_VOICE
  89
  90
  91 /* default point to start buffer refill */
  92 #define AUDIO_DEFAULT_WATERMARK      (1024*512)
  93 /* amount of data to read in one read() call */
  94 #define AUDIO_DEFAULT_FILECHUNK      (1024*32)
  95 /* point at which the file buffer will fight for CPU time */
  96 #define AUDIO_FILEBUF_CRITICAL       (1024*128)
  97 /* amount of guess-space to allow for codecs that must hunt and peck
  98  * for their correct seeek target, 32k seems a good size */
  99 #define AUDIO_REBUFFER_GUESS_SIZE    (1024*32)
 100
 101 /* macros to enable logf for queues
 102    logging on SYS_TIMEOUT can be disabled */
 103 #ifdef SIMULATOR
 104 /* Define this for logf output of all queuing except SYS_TIMEOUT */
 105 #define PLAYBACK_LOGQUEUES
 106 /* Define this to logf SYS_TIMEOUT messages */
 107 #define PLAYBACK_LOGQUEUES_SYS_TIMEOUT
 108 #endif
 109
 110 #ifdef PLAYBACK_LOGQUEUES
 111 #define LOGFQUEUE logf
 112 #else
 113 #define LOGFQUEUE(...)
 114 #endif
 115
 116 #ifdef PLAYBACK_LOGQUEUES_SYS_TIMEOUT
 117 #define LOGFQUEUE_SYS_TIMEOUT logf
 118 #else
 119 #define LOGFQUEUE_SYS_TIMEOUT(...)
 120 #endif
 121
 122
 123 /* Define one constant that includes recording related functionality */
 124 #if defined(HAVE_RECORDING) && !defined(SIMULATOR)
 125 #define AUDIO_HAVE_RECORDING
 126 #endif
 127
 128 enum {
 129     Q_AUDIO_PLAY = 1,
 130     Q_AUDIO_STOP,
 131     Q_AUDIO_PAUSE,
 132     Q_AUDIO_SKIP,
 133     Q_AUDIO_PRE_FF_REWIND,
 134     Q_AUDIO_FF_REWIND,
 135     Q_AUDIO_REBUFFER_SEEK,
 136     Q_AUDIO_CHECK_NEW_TRACK,
 137     Q_AUDIO_FLUSH,
 138     Q_AUDIO_TRACK_CHANGED,
 139     Q_AUDIO_DIR_SKIP,
 140     Q_AUDIO_POSTINIT,
 141     Q_AUDIO_FILL_BUFFER,
 142 #if MEM > 8
 143     Q_AUDIO_FILL_BUFFER_IF_ACTIVE_ATA,
 144 #endif
 145     Q_CODEC_REQUEST_COMPLETE,
 146     Q_CODEC_REQUEST_FAILED,
 147
 148     Q_VOICE_PLAY,
 149     Q_VOICE_STOP,
 150
 151     Q_CODEC_LOAD,
 152     Q_CODEC_LOAD_DISK,
 153
 154 #ifdef AUDIO_HAVE_RECORDING
 155     Q_ENCODER_LOAD_DISK,
 156     Q_ENCODER_RECORD,
 157 #endif
 158 };
 159
 160 /* As defined in plugins/lib/xxx2wav.h */
 161 #if MEM > 1
 162 #define MALLOC_BUFSIZE (512*1024)
 163 #define GUARD_BUFSIZE  (32*1024)
 164 #else
 165 #define MALLOC_BUFSIZE (100*1024)
 166 #define GUARD_BUFSIZE  (8*1024)
 167 #endif
 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 #ifndef IBSS_ATTR_VOICE_STACK
 182 #define IBSS_ATTR_VOICE_STACK IBSS_ATTR
 183 #endif
 184
 185 bool audio_is_initialized = false;
 186
 187 /* Variables are commented with the threads that use them: *
 188  * A=audio, C=codec, V=voice. A suffix of - indicates that *
 189  * the variable is read but not updated on that thread.    */
 190 /* TBD: Split out "audio" and "playback" (ie. calling) threads */
 191
 192 /* Main state control */
 193 static volatile bool audio_codec_loaded NOCACHEBSS_ATTR = false; /* Codec loaded? (C/A-) */
 194 static volatile bool playing NOCACHEBSS_ATTR = false; /* Is audio playing? (A) */
 195 static volatile bool paused NOCACHEBSS_ATTR = false; /* Is audio paused? (A/C-) */
 196 static volatile bool filling IDATA_ATTR = false; /* Is file buffer refilling? (A/C-) */
 197
 198 /* Ring buffer where compressed audio and codecs are loaded */
 199 static unsigned char *filebuf = NULL;       /* Start of buffer (A/C-) */
 200 static unsigned char *malloc_buf = NULL;    /* Start of malloc buffer (A/C-) */
 201 /* FIXME: make filebuflen static */
 202 size_t filebuflen = 0;                      /* Size of buffer (A/C-) */
 203 /* FIXME: make buf_ridx (C/A-) */
 204 static volatile size_t buf_ridx IDATA_ATTR = 0; /* Buffer read position (A/C)*/
 205 static volatile size_t buf_widx IDATA_ATTR = 0; /* Buffer write position (A/C-) */
 206
 207 /* Possible arrangements of the buffer */
 208 #define BUFFER_STATE_TRASHED        -1          /* trashed; must be reset */
 209 #define BUFFER_STATE_INITIALIZED     0          /* voice+audio OR audio-only */
 210 #define BUFFER_STATE_VOICED_ONLY     1          /* voice-only */
 211 static int buffer_state = BUFFER_STATE_TRASHED; /* Buffer state */
 212
 213 /* Compressed ring buffer helper macros */
 214 /* Buffer pointer (p) plus value (v), wrapped if necessary */
 215 #define RINGBUF_ADD(p,v) ((p+v)<filebuflen ? p+v : p+v-filebuflen)
 216 /* Buffer pointer (p) minus value (v), wrapped if necessary */
 217 #define RINGBUF_SUB(p,v) ((p>=v) ? p-v : p+filebuflen-v)
 218 /* How far value (v) plus buffer pointer (p1) will cross buffer pointer (p2) */
 219 #define RINGBUF_ADD_CROSS(p1,v,p2) \
 220     ((p1<p2)?(int)(p1+v)-(int)p2:(int)(p1+v-p2)-(int)filebuflen)
 221 /* Bytes available in the buffer */
 222 #define FILEBUFUSED RINGBUF_SUB(buf_widx, buf_ridx)
 223
 224 /* Track info structure about songs in the file buffer (A/C-) */
 225 static struct track_info tracks[MAX_TRACK];
 226 static volatile int track_ridx = 0;  /* Track being decoded (A/C-) */
 227 static int track_widx = 0;           /* Track being buffered (A) */
 228
 229 static struct track_info *prev_ti = NULL; /* Previous track info pointer (A/C-) */
 230 #define CUR_TI (&tracks[track_ridx]) /* Playing track info pointer (A/C-) */
 231
 232 /* Set by the audio thread when the current track information has updated
 233  * and the WPS may need to update its cached information */
 234 static bool track_changed = false;
 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 /* Partially loaded track file handle to continue buffering (A) */
 240 static int current_fd = -1;
 241
 242 /* Scrobbler support */
 243 static unsigned long prev_track_elapsed = 0; /* Previous track elapsed time (C/A-)*/
 244
 245 /* Track change controls */
 246 static bool automatic_skip = false; /* Who initiated in-progress skip? (C/A-) */
 247 static bool playlist_end = false;   /* Has the current playlist ended? (A) */
 248 static bool dir_skip = false;       /* Is a directory skip pending? (A) */
 249 static bool new_playlist = false;   /* Are we starting a new playlist? (A) */
 250 /* Pending track change offset, to keep WPS responsive (A) */
 251 static int wps_offset = 0;
 252
 253 /* Callbacks which applications or plugins may set */
 254 /* When the playing track has changed from the user's perspective */
 255 void (*track_changed_callback)(struct mp3entry *id3) = NULL;
 256 /* When a track has been buffered */
 257 void (*track_buffer_callback)(struct mp3entry *id3, bool last_track) = NULL;
 258 /* When a track's buffer has been overwritten or cleared */
 259 void (*track_unbuffer_callback)(struct mp3entry *id3, bool last_track) = NULL;
 260
 261 /* Configuration */
 262 static size_t conf_watermark = 0; /* Level to trigger filebuf fill (A/C) FIXME */
 263 static size_t conf_filechunk = 0; /* Largest chunk the codec accepts (A/C) FIXME */
 264 static size_t conf_preseek   = 0; /* Codec pre-seek margin (A/C) FIXME */
 265 static size_t buffer_margin  = 0; /* Buffer margin aka anti-skip buffer (A/C-) */
 266 static bool v1first = false;      /* ID3 data control, true if V1 then V2 (A) */
 267 #if MEM > 8
 268 static size_t high_watermark = 0; /* High watermark for rebuffer (A/V/other) */
 269 #endif
 270
 271 /* Multiple threads */
 272 static void set_current_codec(int codec_idx);
 273 /* Set the watermark to trigger buffer fill (A/C) FIXME */
 274 static void set_filebuf_watermark(int seconds);
 275
 276 /* Audio thread */
 277 static struct event_queue       audio_queue;
 278 static struct queue_sender_list audio_queue_sender_list;
 279 static long audio_stack[(DEFAULT_STACK_SIZE + 0x1000)/sizeof(long)];
 280 static const char audio_thread_name[] = "audio";
 281
 282 static void audio_thread(void);
 283 static void audio_initiate_track_change(long direction);
 284 static bool audio_have_tracks(void);
 285 static void audio_reset_buffer(void);
 286
 287 /* Codec thread */
 288 extern struct codec_api ci;
 289 static struct event_queue codec_queue NOCACHEBSS_ATTR;
 290 static long codec_stack[(DEFAULT_STACK_SIZE + 0x2000)/sizeof(long)]
 291 IBSS_ATTR;
 292 static const char codec_thread_name[] = "codec";
 293 struct thread_entry *codec_thread_p; /* For modifying thread priority later. */
 294
 295 static volatile int current_codec IDATA_ATTR; /* Current codec (normal/voice) */
 296
 297 /* Voice thread */
 298 #ifdef PLAYBACK_VOICE
 299
 300 extern struct codec_api ci_voice;
 301
 302 static struct thread_entry *voice_thread_p = NULL;
 303 static struct event_queue voice_queue NOCACHEBSS_ATTR;
 304 static long voice_stack[(DEFAULT_STACK_SIZE + 0x2000)/sizeof(long)]
 305 IBSS_ATTR_VOICE_STACK;
 306 static const char voice_thread_name[] = "voice codec";
 307
 308 /* Voice codec swapping control */
 309 extern unsigned char codecbuf[];                /* DRAM codec swap buffer */
 310
 311 #ifdef SIMULATOR
 312 /* IRAM codec swap buffer for sim*/
 313 static unsigned char sim_iram[CODEC_IRAM_SIZE];
 314 #undef CODEC_IRAM_ORIGIN
 315 #define CODEC_IRAM_ORIGIN sim_iram
 316 #endif
 317
 318 /* iram_buf and dram_buf are either both NULL or both non-NULL */
 319 /* Pointer to IRAM buffer for codec swapping */
 320 static unsigned char *iram_buf = NULL;
 321 /* Pointer to DRAM buffer for codec swapping */
 322 static unsigned char *dram_buf = NULL;
 323 /* Parity of swap_codec calls - needed because one codec swapping itself in
 324    automatically swaps in the other and the swap when unlocking should not
 325    happen if the parity is even.
 326  */
 327 static bool          swap_codec_parity = false; /* true=odd, false=even */
 328 /* Mutex to control which codec (normal/voice) is running */
 329 static struct mutex mutex_codecthread NOCACHEBSS_ATTR;
 330
 331 /* Voice state */
 332 static volatile bool voice_thread_start = false; /* Triggers voice playback (A/V) */
 333 static volatile bool voice_is_playing NOCACHEBSS_ATTR = false; /* Is voice currently playing? (V) */
 334 static volatile bool voice_codec_loaded NOCACHEBSS_ATTR = false; /* Is voice codec loaded (V/A-) */
 335 static unsigned char *voicebuf = NULL;
 336 static size_t voice_remaining = 0;
 337
 338 #ifdef IRAM_STEAL
 339 /* Voice IRAM has been stolen for other use */
 340 static bool voice_iram_stolen = false;
 341 #endif
 342
 343 static void (*voice_getmore)(unsigned char** start, size_t* size) = NULL;
 344
 345 struct voice_info {
 346     void (*callback)(unsigned char **start, size_t* size);
 347     size_t size;
 348     unsigned char *buf;
 349 };
 350 static void voice_thread(void);
 351 static void voice_stop(void);
 352
 353 #endif /* PLAYBACK_VOICE */
 354
 355 /* --- External interfaces --- */
 356
 357 void mp3_play_data(const unsigned char* start, int size,
 358                    void (*get_more)(unsigned char** start, size_t* size))
 359 {
 360 #ifdef PLAYBACK_VOICE
 361     static struct voice_info voice_clip;
 362     voice_clip.callback = get_more;
 363     voice_clip.buf = (unsigned char*)start;
 364     voice_clip.size = size;
 365     LOGFQUEUE("mp3 > voice Q_VOICE_STOP");
 366     queue_post(&voice_queue, Q_VOICE_STOP, 0);
 367     LOGFQUEUE("mp3 > voice Q_VOICE_PLAY");
 368     queue_post(&voice_queue, Q_VOICE_PLAY, (intptr_t)&voice_clip);
 369     voice_thread_start = true;
 370     trigger_cpu_boost();
 371 #else
 372     (void) start;
 373     (void) size;
 374     (void) get_more;
 375 #endif
 376 }
 377
 378 void mp3_play_stop(void)
 379 {
 380 #ifdef PLAYBACK_VOICE
 381     queue_remove_from_head(&voice_queue, Q_VOICE_STOP);
 382     LOGFQUEUE("mp3 > voice Q_VOICE_STOP");
 383     queue_post(&voice_queue, Q_VOICE_STOP, 1);
 384 #endif
 385 }
 386
 387 void mp3_play_pause(bool play)
 388 {
 389     /* a dummy */
 390     (void)play;
 391 }
 392
 393 bool mp3_is_playing(void)
 394 {
 395     return voice_is_playing;
 396 }
 397
 398 void mpeg_id3_options(bool _v1first)
 399 {
 400     v1first = _v1first;
 401 }
 402
 403 /* If voice could be swapped out - wait for it to return
 404  * Used by buffer claming functions.
 405  */
 406 static void wait_for_voice_swap_in(void)
 407 {
 408 #ifdef PLAYBACK_VOICE
 409     if (NULL == iram_buf)
 410         return;
 411
 412     while (current_codec != CODEC_IDX_VOICE)
 413         yield();
 414 #endif /* PLAYBACK_VOICE */
 415 }
 416
 417 /* This sends a stop message and the audio thread will dump all it's
 418    subsequenct messages */
 419 static void audio_hard_stop(void)
 420 {
 421     /* Stop playback */
 422     LOGFQUEUE("audio >| audio Q_AUDIO_STOP: 1");
 423     queue_send(&audio_queue, Q_AUDIO_STOP, 1);
 424 }
 425
 426 unsigned char *audio_get_buffer(bool talk_buf, size_t *buffer_size)
 427 {
 428     unsigned char *buf, *end;
 429
 430     if (audio_is_initialized)
 431     {
 432         audio_hard_stop();
 433         wait_for_voice_swap_in();
 434         voice_stop();
 435     }
 436     /* else buffer_state will be BUFFER_STATE_TRASHED at this point */
 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 = BUFFER_STATE_TRASHED;
 443         return NULL;
 444     }
 445
 446     if (talk_buf || buffer_state == BUFFER_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 BUFFER_STATE_TRASHED already. If state is
 453            BUFFER_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 != BUFFER_STATE_TRASHED)
 459         {
 460             talk_buffer_steal();
 461             buffer_state = BUFFER_STATE_TRASHED;
 462         }
 463
 464         buf = audiobuf;
 465         end = audiobufend;
 466     }
 467     else
 468     {
 469         /* Safe to just return this if already BUFFER_STATE_VOICED_ONLY or
 470            still BUFFER_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 = BUFFER_STATE_VOICED_ONLY;
 478     }
 479
 480     *buffer_size = end - buf;
 481
 482     return buf;
 483 }
 484
 485 #ifdef IRAM_STEAL
 486 void audio_iram_steal(void)
 487 {
 488     /* We need to stop audio playback in order to use codec IRAM */
 489     audio_hard_stop();
 490
 491 #ifdef PLAYBACK_VOICE
 492     if (NULL != iram_buf)
 493     {
 494         /* Can't already be stolen */
 495         if (voice_iram_stolen)
 496             return;
 497
 498         /* Must wait for voice to be current again if it is swapped which
 499            would cause the caller's buffer to get clobbered when voice locks
 500            and runs - we'll wait for it to lock and yield again then make sure
 501            the ride has come to a complete stop */
 502         wait_for_voice_swap_in();
 503         voice_stop();
 504
 505         /* Save voice IRAM but just memcpy - safe to do here since voice
 506            is current and no audio codec is loaded */
 507         memcpy(iram_buf, CODEC_IRAM_ORIGIN, CODEC_IRAM_SIZE);
 508         voice_iram_stolen = true;
 509     }
 510     else
 511     {
 512         /* Nothing much to do if no voice */
 513         voice_iram_stolen = false;
 514     }
 515 #endif
 516 }
 517 #endif /* IRAM_STEAL */
 518
 519 #ifdef HAVE_RECORDING
 520 unsigned char *audio_get_recording_buffer(size_t *buffer_size)
 521 {
 522     /* Don't allow overwrite of voice swap area or we'll trash the
 523        swapped-out voice codec but can use whole thing if none */
 524     unsigned char *end;
 525
 526     /* Stop audio and voice. Wait for voice to swap in and be clear
 527        of pending events to ensure trouble-free operation of encoders */
 528     audio_hard_stop();
 529     wait_for_voice_swap_in();
 530     voice_stop();
 531     talk_buffer_steal();
 532
 533 #ifdef PLAYBACK_VOICE
 534     /* If no dram_buf, swap space not used and recording gets more
 535        memory. Codec swap areas will remain unaffected by the next init
 536        since they're allocated at the end of the buffer and their sizes
 537        don't change between calls */
 538     end = dram_buf;
 539     if (NULL == end)
 540 #endif /* PLAYBACK_VOICE */
 541         end = audiobufend;
 542
 543     buffer_state = BUFFER_STATE_TRASHED;
 544
 545     *buffer_size = end - audiobuf;
 546
 547     return (unsigned char *)audiobuf;
 548 }
 549
 550 bool audio_load_encoder(int afmt)
 551 {
 552 #ifndef SIMULATOR
 553     const char *enc_fn = get_codec_filename(afmt | CODEC_TYPE_ENCODER);
 554     if (!enc_fn)
 555         return false;
 556
 557     audio_remove_encoder();
 558     ci.enc_codec_loaded = 0; /* clear any previous error condition */
 559
 560     LOGFQUEUE("codec > Q_ENCODER_LOAD_DISK");
 561     queue_post(&codec_queue, Q_ENCODER_LOAD_DISK, (intptr_t)enc_fn);
 562
 563     while (ci.enc_codec_loaded == 0)
 564         yield();
 565
 566     logf("codec loaded: %d", ci.enc_codec_loaded);
 567
 568     return ci.enc_codec_loaded > 0;
 569 #else
 570     (void)afmt;
 571     return true;
 572 #endif
 573 } /* audio_load_encoder */
 574
 575 void audio_remove_encoder(void)
 576 {
 577 #ifndef SIMULATOR
 578     /* force encoder codec unload (if currently loaded) */
 579     if (ci.enc_codec_loaded <= 0)
 580         return;
 581
 582     ci.stop_encoder = true;
 583     while (ci.enc_codec_loaded > 0)
 584         yield();
 585 #endif
 586 } /* audio_remove_encoder */
 587
 588 #endif /* HAVE_RECORDING */
 589
 590 struct mp3entry* audio_current_track(void)
 591 {
 592     const char *filename;
 593     const char *p;
 594     static struct mp3entry temp_id3;
 595     int cur_idx;
 596     int offset = ci.new_track + wps_offset;
 597
 598     cur_idx = track_ridx + offset;
 599     cur_idx &= MAX_TRACK_MASK;
 600
 601     if (tracks[cur_idx].taginfo_ready)
 602         return &tracks[cur_idx].id3;
 603
 604     memset(&temp_id3, 0, sizeof(struct mp3entry));
 605
 606     filename = playlist_peek(offset);
 607     if (!filename)
 608         filename = "No file!";
 609
 610 #ifdef HAVE_TC_RAMCACHE
 611     if (tagcache_fill_tags(&temp_id3, filename))
 612         return &temp_id3;
 613 #endif
 614
 615     p = strrchr(filename, '/');
 616     if (!p)
 617         p = filename;
 618     else
 619         p++;
 620
 621     strncpy(temp_id3.path, p, sizeof(temp_id3.path)-1);
 622     temp_id3.title = &temp_id3.path[0];
 623
 624     return &temp_id3;
 625 }
 626
 627 struct mp3entry* audio_next_track(void)
 628 {
 629     int next_idx = track_ridx;
 630
 631     if (!audio_have_tracks())
 632         return NULL;
 633
 634     next_idx++;
 635     next_idx &= MAX_TRACK_MASK;
 636
 637     if (!tracks[next_idx].taginfo_ready)
 638         return NULL;
 639
 640     return &tracks[next_idx].id3;
 641 }
 642
 643 bool audio_has_changed_track(void)
 644 {
 645     if (track_changed)
 646     {
 647         track_changed = false;
 648         return true;
 649     }
 650
 651     return false;
 652 }
 653
 654 void audio_play(long offset)
 655 {
 656     logf("audio_play");
 657
 658 #ifdef PLAYBACK_VOICE
 659     /* Truncate any existing voice output so we don't have spelling
 660      * etc. over the first part of the played track */
 661     LOGFQUEUE("mp3 > voice Q_VOICE_STOP");
 662     queue_post(&voice_queue, Q_VOICE_STOP, 1);
 663 #endif
 664
 665     /* Start playback */
 666     LOGFQUEUE("audio >| audio Q_AUDIO_PLAY: %ld", offset);
 667     /* Don't return until playback has actually started */
 668     queue_send(&audio_queue, Q_AUDIO_PLAY, offset);
 669 }
 670
 671 void audio_stop(void)
 672 {
 673     /* Stop playback */
 674     LOGFQUEUE("audio >| audio Q_AUDIO_STOP");
 675     /* Don't return until playback has actually stopped */
 676     queue_send(&audio_queue, Q_AUDIO_STOP, 0);
 677 }
 678
 679 void audio_pause(void)
 680 {
 681     LOGFQUEUE("audio >| audio Q_AUDIO_PAUSE");
 682     /* Don't return until playback has actually paused */
 683     queue_send(&audio_queue, Q_AUDIO_PAUSE, true);
 684 }
 685
 686 void audio_resume(void)
 687 {
 688     LOGFQUEUE("audio >| audio Q_AUDIO_PAUSE resume");
 689     /* Don't return until playback has actually resumed */
 690     queue_send(&audio_queue, Q_AUDIO_PAUSE, false);
 691 }
 692
 693 void audio_next(void)
 694 {
 695     if (playlist_check(ci.new_track + wps_offset + 1))
 696     {
 697         if (global_settings.beep)
 698             pcmbuf_beep(5000, 100, 2500*global_settings.beep);
 699
 700         LOGFQUEUE("audio > audio Q_AUDIO_SKIP 1");
 701         queue_post(&audio_queue, Q_AUDIO_SKIP, 1);
 702         /* Update wps while our message travels inside deep playback queues. */
 703         wps_offset++;
 704         track_changed = true;
 705     }
 706     else
 707     {
 708         /* No more tracks. */
 709         if (global_settings.beep)
 710             pcmbuf_beep(1000, 100, 1000*global_settings.beep);
 711     }
 712 }
 713
 714 void audio_prev(void)
 715 {
 716     if (playlist_check(ci.new_track + wps_offset - 1))
 717     {
 718         if (global_settings.beep)
 719             pcmbuf_beep(5000, 100, 2500*global_settings.beep);
 720
 721         LOGFQUEUE("audio > audio Q_AUDIO_SKIP -1");
 722         queue_post(&audio_queue, Q_AUDIO_SKIP, -1);
 723         /* Update wps while our message travels inside deep playback queues. */
 724         wps_offset--;
 725         track_changed = true;
 726     }
 727     else
 728     {
 729         /* No more tracks. */
 730         if (global_settings.beep)
 731             pcmbuf_beep(1000, 100, 1000*global_settings.beep);
 732     }
 733 }
 734
 735 void audio_next_dir(void)
 736 {
 737     LOGFQUEUE("audio > audio Q_AUDIO_DIR_SKIP 1");
 738     queue_post(&audio_queue, Q_AUDIO_DIR_SKIP, 1);
 739 }
 740
 741 void audio_prev_dir(void)
 742 {
 743     LOGFQUEUE("audio > audio Q_AUDIO_DIR_SKIP -1");
 744     queue_post(&audio_queue, Q_AUDIO_DIR_SKIP, -1);
 745 }
 746
 747 void audio_pre_ff_rewind(void)
 748 {
 749     LOGFQUEUE("audio > audio Q_AUDIO_PRE_FF_REWIND");
 750     queue_post(&audio_queue, Q_AUDIO_PRE_FF_REWIND, 0);
 751 }
 752
 753 void audio_ff_rewind(long newpos)
 754 {
 755     LOGFQUEUE("audio > audio Q_AUDIO_FF_REWIND");
 756     queue_post(&audio_queue, Q_AUDIO_FF_REWIND, newpos);
 757 }
 758
 759 void audio_flush_and_reload_tracks(void)
 760 {
 761     LOGFQUEUE("audio > audio Q_AUDIO_FLUSH");
 762     queue_post(&audio_queue, Q_AUDIO_FLUSH, 0);
 763 }
 764
 765 void audio_error_clear(void)
 766 {
 767 #ifdef AUDIO_HAVE_RECORDING
 768     pcm_rec_error_clear();
 769 #endif
 770 }
 771
 772 int audio_status(void)
 773 {
 774     int ret = 0;
 775
 776     if (playing)
 777         ret |= AUDIO_STATUS_PLAY;
 778
 779     if (paused)
 780         ret |= AUDIO_STATUS_PAUSE;
 781
 782 #ifdef HAVE_RECORDING
 783     /* Do this here for constitency with mpeg.c version */
 784     ret |= pcm_rec_status();
 785 #endif
 786
 787     return ret;
 788 }
 789
 790 int audio_get_file_pos(void)
 791 {
 792     return 0;
 793 }
 794
 795 void audio_set_buffer_margin(int setting)
 796 {
 797     static const int lookup[] = {5, 15, 30, 60, 120, 180, 300, 600};
 798     buffer_margin = lookup[setting];
 799     logf("buffer margin: %ld", buffer_margin);
 800     set_filebuf_watermark(buffer_margin);
 801 }
 802
 803 /* Take nescessary steps to enable or disable the crossfade setting */
 804 void audio_set_crossfade(int enable)
 805 {
 806     size_t offset;
 807     bool was_playing;
 808     size_t size;
 809
 810     /* Tell it the next setting to use */
 811     pcmbuf_crossfade_enable(enable);
 812
 813     /* Return if size hasn't changed or this is too early to determine
 814        which in the second case there's no way we could be playing
 815        anything at all */
 816     if (pcmbuf_is_same_size())
 817     {
 818         /* This function is a copout and just syncs some variables -
 819            to be removed at a later date */
 820         pcmbuf_crossfade_enable_finished();
 821         return;
 822     }
 823
 824     offset = 0;
 825     was_playing = playing;
 826
 827     /* Playback has to be stopped before changing the buffer size */
 828     if (was_playing)
 829     {
 830         /* Store the track resume position */
 831         offset = CUR_TI->id3.offset;
 832         gui_syncsplash(0, str(LANG_RESTARTING_PLAYBACK));
 833     }
 834
 835     /* Blast it - audio buffer will have to be setup again next time
 836        something plays */
 837     audio_get_buffer(true, &size);
 838
 839     /* Restart playback if audio was running previously */
 840     if (was_playing)
 841         audio_play(offset);
 842 }
 843
 844 /* --- Routines called from multiple threads --- */
 845 static void set_current_codec(int codec_idx)
 846 {
 847     current_codec = codec_idx;
 848     dsp_configure(DSP_SWITCH_CODEC, codec_idx);
 849 }
 850
 851 #ifdef PLAYBACK_VOICE
 852 static void swap_codec(void)
 853 {
 854     int my_codec;
 855
 856     /* Swap nothing if no swap buffers exist */
 857     if (dram_buf == NULL)
 858     {
 859         logf("swap: no swap buffers");
 860         return;
 861     }
 862
 863     my_codec = current_codec;
 864
 865     logf("swapping out codec: %d", my_codec);
 866
 867     /* Invert this when a codec thread enters and leaves */
 868     swap_codec_parity = !swap_codec_parity;
 869
 870     /* If this is true, an odd number of calls has occurred and there's
 871        no codec thread waiting to swap us out when it locks and runs. This
 872        occurs when playback is stopped or when just starting playback and
 873        the audio thread is loading a codec; parities should always be even
 874        on entry when a thread calls this during playback */
 875     if (swap_codec_parity)
 876     {
 877         /* Save our current IRAM and DRAM */
 878 #ifdef IRAM_STEAL
 879         if (voice_iram_stolen)
 880         {
 881             logf("swap: iram restore");
 882             voice_iram_stolen = false;
 883             /* Don't swap trashed data into buffer as the voice IRAM will
 884                already be swapped out - should _always_ be the case if
 885                voice_iram_stolen is true since the voice has been swapped
 886                in beforehand */
 887             if (my_codec == CODEC_IDX_VOICE)
 888             {
 889                 logf("voice iram already swapped");
 890                 goto skip_iram_swap;
 891             }
 892         }
 893 #endif
 894
 895         memswap128(iram_buf, CODEC_IRAM_ORIGIN, CODEC_IRAM_SIZE);
 896
 897 #ifdef IRAM_STEAL
 898     skip_iram_swap:
 899 #endif
 900
 901         memswap128(dram_buf, codecbuf, CODEC_SIZE);
 902         /* No cache invalidation needed; it will be done in codec_load_ram
 903            or we won't be here otherwise */
 904     }
 905
 906     /* Release my semaphore */
 907     mutex_unlock(&mutex_codecthread);
 908     logf("unlocked: %d", my_codec);
 909
 910     /* Loop until the other codec has locked and run */
 911     do {
 912         /* Release my semaphore and force a task switch. */
 913         yield();
 914     } while (my_codec == current_codec);
 915
 916     /* Wait for other codec to unlock */
 917     /* FIXME: We need some sort of timed boost cancellation here or the CPU
 918        doesn't unboost during playback when the voice codec goes back to
 919        waiting - recall that mutex_lock calls block_thread which is an
 920        indefinite wait that doesn't cancel the thread's CPU boost */
 921     mutex_lock(&mutex_codecthread);
 922
 923     /* Take control */
 924     logf("waiting for lock: %d", my_codec);
 925     set_current_codec(my_codec);
 926
 927     /* Reload our IRAM and DRAM */
 928     memswap128(iram_buf, CODEC_IRAM_ORIGIN, CODEC_IRAM_SIZE);
 929     memswap128(dram_buf, codecbuf, CODEC_SIZE);
 930     invalidate_icache();
 931
 932     /* Flip parity again */
 933     swap_codec_parity = !swap_codec_parity;
 934
 935     logf("resuming codec: %d", my_codec);
 936 }
 937
 938 /* This function is meant to be used by the buffer stealing functions to
 939    ensure the codec is no longer active and so voice will be swapped-in
 940    before it is called */
 941 static void voice_stop(void)
 942 {
 943 #ifdef PLAYBACK_VOICE
 944     /* Must have a voice codec loaded or we'll hang forever here */
 945     if (!voice_codec_loaded)
 946         return;
 947
 948     LOGFQUEUE("mp3 > voice Q_VOICE_STOP");
 949     queue_post(&voice_queue, Q_VOICE_STOP, 0);
 950
 951     /* Loop until voice empties it's queue, stops and picks up on the new
 952        track; the voice thread must be stopped and waiting for messages
 953        outside the codec */
 954     while (voice_is_playing || !queue_empty(&voice_queue) ||
 955            ci_voice.new_track)
 956         yield();
 957
 958     if (!playing)
 959         pcmbuf_play_stop();
 960 #endif
 961 } /* voice_stop */
 962 #endif /* PLAYBACK_VOICE */
 963
 964 static void set_filebuf_watermark(int seconds)
 965 {
 966     size_t bytes;
 967
 968     if (!filebuf)
 969         return;     /* Audio buffers not yet set up */
 970
 971     bytes = MAX(CUR_TI->id3.bitrate * seconds * (1000/8), conf_watermark);
 972     bytes = MIN(bytes, filebuflen / 2);
 973     conf_watermark = bytes;
 974 }
 975
 976 const char * get_codec_filename(int cod_spec)
 977 {
 978     const char *fname;
 979
 980 #ifdef HAVE_RECORDING
 981     /* Can choose decoder or encoder if one available */
 982     int type = cod_spec & CODEC_TYPE_MASK;
 983     int afmt = cod_spec & CODEC_AFMT_MASK;
 984
 985     if ((unsigned)afmt >= AFMT_NUM_CODECS)
 986         type = AFMT_UNKNOWN | (type & CODEC_TYPE_MASK);
 987
 988     fname = (type == CODEC_TYPE_ENCODER) ?
 989                 audio_formats[afmt].codec_enc_root_fn :
 990                 audio_formats[afmt].codec_root_fn;
 991
 992     logf("%s: %d - %s",
 993         (type == CODEC_TYPE_ENCODER) ? "Encoder" : "Decoder",
 994         afmt, fname ? fname : "<unknown>");
 995 #else /* !HAVE_RECORDING */
 996     /* Always decoder */
 997     if ((unsigned)cod_spec >= AFMT_NUM_CODECS)
 998         cod_spec = AFMT_UNKNOWN;
 999     fname = audio_formats[cod_spec].codec_root_fn;
1000     logf("Codec: %d - %s",  cod_spec, fname ? fname : "<unknown>");
1001 #endif /* HAVE_RECORDING */
1002
1003     return fname;
1004 } /* get_codec_filename */
1005
1006
1007 /* --- Voice thread --- */
1008
1009 #ifdef PLAYBACK_VOICE
1010
1011 static bool voice_pcmbuf_insert_callback(
1012         const void *ch1, const void *ch2, int count)
1013 {
1014     const char *src[2] = { ch1, ch2 };
1015
1016     while (count > 0)
1017     {
1018         int out_count = dsp_output_count(count);
1019         int inp_count;
1020         char *dest;
1021
1022         while ((dest = pcmbuf_request_voice_buffer(
1023                         &out_count, playing)) == NULL)
1024         {
1025             if (playing && audio_codec_loaded)
1026                 swap_codec();
1027             else
1028                 yield();
1029         }
1030
1031         /* Get the real input_size for output_size bytes, guarding
1032          * against resampling buffer overflows. */
1033         inp_count = dsp_input_count(out_count);
1034
1035         if (inp_count <= 0)
1036             return true;
1037
1038         /* Input size has grown, no error, just don't write more than length */
1039         if (inp_count > count)
1040             inp_count = count;
1041
1042         out_count = dsp_process(dest, src, inp_count);
1043
1044         if (out_count <= 0)
1045             return true;
1046
1047         if (playing)
1048         {
1049             pcmbuf_mix_voice(out_count);
1050             if ((pcmbuf_usage() < 10 || pcmbuf_mix_free() < 30) &&
1051                     audio_codec_loaded)
1052                 swap_codec();
1053         }
1054         else
1055             pcmbuf_write_complete(out_count);
1056
1057         count -= inp_count;
1058     }
1059
1060     return true;
1061 } /* voice_pcmbuf_insert_callback */
1062
1063 static void* voice_get_memory_callback(size_t *size)
1064 {
1065     /* Voice should have no use for this. If it did, we'd have to
1066        swap the malloc buffer as well. */
1067     *size = 0;
1068     return NULL;
1069 }
1070
1071 static void voice_set_elapsed_callback(unsigned int value)
1072 {
1073     (void)value;
1074 }
1075
1076 static void voice_set_offset_callback(size_t value)
1077 {
1078     (void)value;
1079 }
1080
1081 static void voice_configure_callback(int setting, intptr_t value)
1082 {
1083     if (!dsp_configure(setting, value))
1084     {
1085         logf("Illegal key:%d", setting);
1086     }
1087 }
1088
1089 static size_t voice_filebuf_callback(void *ptr, size_t size)
1090 {
1091     (void)ptr;
1092     (void)size;
1093
1094     return 0;
1095 }
1096
1097 /* Handle Q_VOICE_STOP and part of SYS_USB_CONNECTED */
1098 static bool voice_on_voice_stop(bool aborting, size_t *realsize)
1099 {
1100     if (aborting && !playing && pcm_is_playing())
1101     {
1102         /* Aborting: Slight hack - flush PCM buffer if
1103            only being used for voice */
1104         pcmbuf_play_stop();
1105     }
1106
1107     if (voice_is_playing)
1108     {
1109         /* Clear the current buffer */
1110         voice_is_playing = false;
1111         voice_getmore = NULL;
1112         voice_remaining = 0;
1113         voicebuf = NULL;
1114
1115         /* Force the codec to think it's changing tracks */
1116         ci_voice.new_track = 1;
1117
1118         *realsize = 0;
1119         return true; /* Yes, change tracks */
1120     }
1121
1122     return false;
1123 }
1124
1125 static void* voice_request_buffer_callback(size_t *realsize, size_t reqsize)
1126 {
1127     struct event ev;
1128
1129     if (ci_voice.new_track)
1130     {
1131         *realsize = 0;
1132         return NULL;
1133     }
1134
1135     while (1)
1136     {
1137         if (voice_is_playing || playing)
1138         {
1139             queue_wait_w_tmo(&voice_queue, &ev, 0);
1140             if (!voice_is_playing && ev.id == SYS_TIMEOUT)
1141                 ev.id = Q_AUDIO_PLAY;
1142         }
1143         else
1144         {
1145             /* We must use queue_wait_w_tmo() because queue_wait() doesn't
1146                unboost the CPU */
1147             /* FIXME: when long timeouts work correctly max out the the timeout
1148                (we'll still need the timeout guard here) or an infinite timeout
1149                can unboost, use that */
1150             do
1151                 queue_wait_w_tmo(&voice_queue, &ev, HZ*5);
1152             while (ev.id == SYS_TIMEOUT); /* Fake infinite wait */
1153         }
1154
1155         switch (ev.id) {
1156             case Q_AUDIO_PLAY:
1157                 LOGFQUEUE("voice < Q_AUDIO_PLAY");
1158                 if (playing)
1159                 {
1160                     if (audio_codec_loaded)
1161                         swap_codec();
1162                     yield();
1163                 }
1164                 break;
1165
1166 #ifdef AUDIO_HAVE_RECORDING
1167             case Q_ENCODER_RECORD:
1168                 LOGFQUEUE("voice < Q_ENCODER_RECORD");
1169                 swap_codec();
1170                 break;
1171 #endif
1172
1173             case Q_VOICE_STOP:
1174                 LOGFQUEUE("voice < Q_VOICE_STOP");
1175                 if (voice_on_voice_stop(ev.data, realsize))
1176                     return NULL;
1177                 break;
1178
1179             case SYS_USB_CONNECTED:
1180             {
1181                 LOGFQUEUE("voice < SYS_USB_CONNECTED");
1182                 bool change_tracks = voice_on_voice_stop(ev.data, realsize);
1183                 /* Voice is obviously current so let us swap ourselves away if
1184                    playing so audio may stop itself - audio_codec_loaded can
1185                    only be true in this case if we're here even if the codec
1186                    is only about to load */
1187                 if (audio_codec_loaded)
1188                     swap_codec();
1189                 /* Playback should be finished by now - ack and wait */
1190                 usb_acknowledge(SYS_USB_CONNECTED_ACK);
1191                 usb_wait_for_disconnect(&voice_queue);
1192                 if (change_tracks)
1193                     return NULL;
1194                 break;
1195                 }
1196
1197             case Q_VOICE_PLAY:
1198                 LOGFQUEUE("voice < Q_VOICE_PLAY");
1199                 if (!voice_is_playing)
1200                 {
1201                     /* Set up new voice data */
1202                     struct voice_info *voice_data;
1203 #ifdef IRAM_STEAL
1204                     if (voice_iram_stolen)
1205                     {
1206                         /* Voice is the first to run again and is currently
1207                            loaded */
1208                         logf("voice: iram restore");
1209                         memcpy(CODEC_IRAM_ORIGIN, iram_buf, CODEC_IRAM_SIZE);
1210                         voice_iram_stolen = false;
1211                     }
1212 #endif
1213                     /* Must reset the buffer before any playback begins if
1214                        needed */
1215                     if (buffer_state == BUFFER_STATE_TRASHED)
1216                         audio_reset_buffer();
1217
1218                     voice_is_playing = true;
1219                     trigger_cpu_boost();
1220                     voice_data = (struct voice_info *)ev.data;
1221                     voice_remaining = voice_data->size;
1222                     voicebuf = voice_data->buf;
1223                     voice_getmore = voice_data->callback;
1224                 }
1225                 goto voice_play_clip; /* To exit both switch and while */
1226
1227             case SYS_TIMEOUT:
1228                 LOGFQUEUE_SYS_TIMEOUT("voice < SYS_TIMEOUT");
1229                 goto voice_play_clip;
1230
1231             default:
1232                 LOGFQUEUE("voice < default");
1233         }
1234     }
1235
1236 voice_play_clip:
1237
1238     if (voice_remaining == 0 || voicebuf == NULL)
1239     {
1240         if (voice_getmore)
1241             voice_getmore((unsigned char **)&voicebuf, &voice_remaining);
1242
1243         /* If this clip is done */
1244         if (voice_remaining == 0)
1245         {
1246             LOGFQUEUE("voice > voice Q_VOICE_STOP");
1247             queue_post(&voice_queue, Q_VOICE_STOP, 0);
1248             /* Force pcm playback. */
1249             if (!pcm_is_playing())
1250                 pcmbuf_play_start();
1251         }
1252     }
1253
1254     *realsize = MIN(voice_remaining, reqsize);
1255
1256     if (*realsize == 0)
1257         return NULL;
1258
1259     return voicebuf;
1260 } /* voice_request_buffer_callback */
1261
1262 static void voice_advance_buffer_callback(size_t amount)
1263 {
1264     amount = MIN(amount, voice_remaining);
1265     voicebuf += amount;
1266     voice_remaining -= amount;
1267 }
1268
1269 static void voice_advance_buffer_loc_callback(void *ptr)
1270 {
1271     size_t amount = (size_t)ptr - (size_t)voicebuf;
1272
1273     voice_advance_buffer_callback(amount);
1274 }
1275
1276 static off_t voice_mp3_get_filepos_callback(int newtime)
1277 {
1278     (void)newtime;
1279
1280     return 0;
1281 }
1282
1283 static void voice_do_nothing(void)
1284 {
1285     return;
1286 }
1287
1288 static bool voice_seek_buffer_callback(size_t newpos)
1289 {
1290     (void)newpos;
1291
1292     return false;
1293 }
1294
1295 static bool voice_request_next_track_callback(void)
1296 {
1297     ci_voice.new_track = 0;
1298     return true;
1299 }
1300
1301 static void voice_thread(void)
1302 {
1303     logf("Loading voice codec");
1304     voice_codec_loaded = true;
1305     mutex_lock(&mutex_codecthread);
1306     set_current_codec(CODEC_IDX_VOICE);
1307     dsp_configure(DSP_RESET, 0);
1308     voice_remaining = 0;
1309     voice_getmore = NULL;
1310
1311     /* FIXME: If we being starting the voice thread without reboot, the
1312        voice_queue could be full of old stuff and we must flush it. */
1313     codec_load_file(get_codec_filename(AFMT_MPA_L3), &ci_voice);
1314
1315     logf("Voice codec finished");
1316     voice_codec_loaded = false;
1317     mutex_unlock(&mutex_codecthread);
1318     voice_thread_p = NULL;
1319     remove_thread(NULL);
1320 } /* voice_thread */
1321
1322 #endif /* PLAYBACK_VOICE */
1323
1324 /* --- Codec thread --- */
1325 static bool codec_pcmbuf_insert_callback(
1326         const void *ch1, const void *ch2, int count)
1327 {
1328     const char *src[2] = { ch1, ch2 };
1329
1330     while (count > 0)
1331     {
1332         int out_count = dsp_output_count(count);
1333         int inp_count;
1334         char *dest;
1335
1336         /* Prevent audio from a previous track from playing */
1337         if (ci.new_track || ci.stop_codec)
1338             return true;
1339
1340         while ((dest = pcmbuf_request_buffer(&out_count)) == NULL)
1341         {
1342             sleep(1);
1343             if (ci.seek_time || ci.new_track || ci.stop_codec)
1344                 return true;
1345         }
1346
1347         /* Get the real input_size for output_size bytes, guarding
1348          * against resampling buffer overflows. */
1349         inp_count = dsp_input_count(out_count);
1350
1351         if (inp_count <= 0)
1352             return true;
1353
1354         /* Input size has grown, no error, just don't write more than length */
1355         if (inp_count > count)
1356             inp_count = count;
1357
1358         out_count = dsp_process(dest, src, inp_count);
1359
1360         if (out_count <= 0)
1361             return true;
1362
1363         pcmbuf_write_complete(out_count);
1364
1365 #ifdef PLAYBACK_VOICE
1366         if ((voice_is_playing || voice_thread_start)
1367             && pcm_is_playing() && voice_codec_loaded &&
1368             pcmbuf_usage() > 30 && pcmbuf_mix_free() > 80)
1369         {
1370             voice_thread_start = false;
1371             swap_codec();
1372         }
1373 #endif
1374
1375         count -= inp_count;
1376     }
1377
1378     return true;
1379 } /* codec_pcmbuf_insert_callback */
1380
1381 static void* codec_get_memory_callback(size_t *size)
1382 {
1383     *size = MALLOC_BUFSIZE;
1384     return malloc_buf;
1385 }
1386
1387 static void codec_pcmbuf_position_callback(size_t size) ICODE_ATTR;
1388 static void codec_pcmbuf_position_callback(size_t size)
1389 {
1390     /* This is called from an ISR, so be quick */
1391     unsigned int time = size * 1000 / 4 / NATIVE_FREQUENCY +
1392         prev_ti->id3.elapsed;
1393
1394     if (time >= prev_ti->id3.length)
1395     {
1396         pcmbuf_set_position_callback(NULL);
1397         prev_ti->id3.elapsed = prev_ti->id3.length;
1398     }
1399     else
1400         prev_ti->id3.elapsed = time;
1401 }
1402
1403 static void codec_set_elapsed_callback(unsigned int value)
1404 {
1405     unsigned int latency;
1406     if (ci.seek_time)
1407         return;
1408
1409 #ifdef AB_REPEAT_ENABLE
1410     ab_position_report(value);
1411 #endif
1412
1413     latency = pcmbuf_get_latency();
1414     if (value < latency)
1415         CUR_TI->id3.elapsed = 0;
1416     else if (value - latency > CUR_TI->id3.elapsed ||
1417             value - latency < CUR_TI->id3.elapsed - 2)
1418     {
1419         CUR_TI->id3.elapsed = value - latency;
1420     }
1421 }
1422
1423 static void codec_set_offset_callback(size_t value)
1424 {
1425     unsigned int latency;
1426
1427     if (ci.seek_time)
1428         return;
1429
1430     latency = pcmbuf_get_latency() * CUR_TI->id3.bitrate / 8;
1431     if (value < latency)
1432         CUR_TI->id3.offset = 0;
1433     else
1434         CUR_TI->id3.offset = value - latency;
1435 }
1436
1437 static void codec_advance_buffer_counters(size_t amount)
1438 {
1439     buf_ridx = RINGBUF_ADD(buf_ridx, amount);
1440     ci.curpos += amount;
1441     CUR_TI->available -= amount;
1442
1443     /* Start buffer filling as necessary. */
1444     if (!pcmbuf_is_lowdata() && !filling)
1445     {
1446         if (FILEBUFUSED < conf_watermark && playing && !playlist_end)
1447         {
1448             LOGFQUEUE("codec > audio Q_AUDIO_FILL_BUFFER");
1449             queue_post(&audio_queue, Q_AUDIO_FILL_BUFFER, 0);
1450         }
1451     }
1452 }
1453
1454 /* copy up-to size bytes into ptr and return the actual size copied */
1455 static size_t codec_filebuf_callback(void *ptr, size_t size)
1456 {
1457     char *buf = (char *)ptr;
1458     size_t copy_n;
1459     size_t part_n;
1460
1461     if (ci.stop_codec || !playing)
1462         return 0;
1463
1464     /* The ammount to copy is the lesser of the requested amount and the
1465      * amount left of the current track (both on disk and already loaded) */
1466     copy_n = MIN(size, CUR_TI->available + CUR_TI->filerem);
1467
1468     /* Nothing requested OR nothing left */
1469     if (copy_n == 0)
1470         return 0;
1471
1472     /* Let the disk buffer catch fill until enough data is available */
1473     while (copy_n > CUR_TI->available)
1474     {
1475         if (!filling)
1476         {
1477             LOGFQUEUE("codec > audio Q_AUDIO_FILL_BUFFER");
1478             queue_post(&audio_queue, Q_AUDIO_FILL_BUFFER, 0);
1479         }
1480
1481         sleep(1);
1482         if (ci.stop_codec || ci.new_track)
1483             return 0;
1484     }
1485
1486     /* Copy as much as possible without wrapping */
1487     part_n = MIN(copy_n, filebuflen - buf_ridx);
1488     memcpy(buf, &filebuf[buf_ridx], part_n);
1489     /* Copy the rest in the case of a wrap */
1490     if (part_n < copy_n) {
1491         memcpy(&buf[part_n], &filebuf[0], copy_n - part_n);
1492     }
1493
1494     /* Update read and other position pointers */
1495     codec_advance_buffer_counters(copy_n);
1496
1497     /* Return the actual amount of data copied to the buffer */
1498     return copy_n;
1499 } /* codec_filebuf_callback */
1500
1501 static void* codec_request_buffer_callback(size_t *realsize, size_t reqsize)
1502 {
1503     size_t short_n, copy_n, buf_rem;
1504
1505     if (!playing)
1506     {
1507         *realsize = 0;
1508         return NULL;
1509     }
1510
1511     copy_n = MIN(reqsize, CUR_TI->available + CUR_TI->filerem);
1512     if (copy_n == 0)
1513     {
1514         *realsize = 0;
1515         return NULL;
1516     }
1517
1518     while (copy_n > CUR_TI->available)
1519     {
1520         if (!filling)
1521         {
1522             LOGFQUEUE("codec > audio Q_AUDIO_FILL_BUFFER");
1523             queue_post(&audio_queue, Q_AUDIO_FILL_BUFFER, 0);
1524         }
1525
1526         sleep(1);
1527         if (ci.stop_codec || ci.new_track)
1528         {
1529             *realsize = 0;
1530             return NULL;
1531         }
1532     }
1533
1534     /* How much is left at the end of the file buffer before wrap? */
1535     buf_rem = filebuflen - buf_ridx;
1536
1537     /* If we can't satisfy the request without wrapping */
1538     if (buf_rem < copy_n)
1539     {
1540         /* How short are we? */
1541         short_n = copy_n - buf_rem;
1542
1543         /* If we can fudge it with the guardbuf */
1544         if (short_n < GUARD_BUFSIZE)
1545             memcpy(&filebuf[filebuflen], &filebuf[0], short_n);
1546         else
1547             copy_n = buf_rem;
1548     }
1549
1550     *realsize = copy_n;
1551
1552     return (char *)&filebuf[buf_ridx];
1553 } /* codec_request_buffer_callback */
1554
1555 static int get_codec_base_type(int type)
1556 {
1557     switch (type) {
1558         case AFMT_MPA_L1:
1559         case AFMT_MPA_L2:
1560         case AFMT_MPA_L3:
1561             return AFMT_MPA_L3;
1562     }
1563
1564     return type;
1565 }
1566
1567 static void codec_advance_buffer_callback(size_t amount)
1568 {
1569     if (amount > CUR_TI->available + CUR_TI->filerem)
1570         amount = CUR_TI->available + CUR_TI->filerem;
1571
1572     while (amount > CUR_TI->available && filling)
1573         sleep(1);
1574
1575     if (amount > CUR_TI->available)
1576     {
1577         intptr_t result = Q_CODEC_REQUEST_FAILED;
1578
1579         if (!ci.stop_codec)
1580         {
1581             LOGFQUEUE("codec >| audio Q_AUDIO_REBUFFER_SEEK");
1582             result = queue_send(&audio_queue, Q_AUDIO_REBUFFER_SEEK,
1583                                 ci.curpos + amount);
1584         }
1585
1586         switch (result)
1587         {
1588             case Q_CODEC_REQUEST_FAILED:
1589                 LOGFQUEUE("codec |< Q_CODEC_REQUEST_FAILED");
1590                 ci.stop_codec = true;
1591                 return;
1592
1593             case Q_CODEC_REQUEST_COMPLETE:
1594                 LOGFQUEUE("codec |< Q_CODEC_REQUEST_COMPLETE");
1595                 return;
1596
1597             default:
1598                 LOGFQUEUE("codec |< default");
1599                 ci.stop_codec = true;
1600                 return;
1601         }
1602     }
1603
1604     codec_advance_buffer_counters(amount);
1605
1606     codec_set_offset_callback(ci.curpos);
1607 }
1608
1609 static void codec_advance_buffer_loc_callback(void *ptr)
1610 {
1611     size_t amount = (size_t)ptr - (size_t)&filebuf[buf_ridx];
1612
1613     codec_advance_buffer_callback(amount);
1614 }
1615
1616 /* Copied from mpeg.c. Should be moved somewhere else. */
1617 static int codec_get_file_pos(void)
1618 {
1619     int pos = -1;
1620     struct mp3entry *id3 = audio_current_track();
1621
1622     if (id3->vbr)
1623     {
1624         if (id3->has_toc)
1625         {
1626             /* Use the TOC to find the new position */
1627             unsigned int percent, remainder;
1628             int curtoc, nexttoc, plen;
1629
1630             percent = (id3->elapsed*100)/id3->length;
1631             if (percent > 99)
1632                 percent = 99;
1633
1634             curtoc = id3->toc[percent];
1635
1636             if (percent < 99)
1637                 nexttoc = id3->toc[percent+1];
1638             else
1639                 nexttoc = 256;
1640
1641             pos = (id3->filesize/256)*curtoc;
1642
1643             /* Use the remainder to get a more accurate position */
1644             remainder   = (id3->elapsed*100)%id3->length;
1645             remainder   = (remainder*100)/id3->length;
1646             plen        = (nexttoc - curtoc)*(id3->filesize/256);
1647             pos        += (plen/100)*remainder;
1648         }
1649         else
1650         {
1651             /* No TOC exists, estimate the new position */
1652             pos = (id3->filesize / (id3->length / 1000)) *
1653                 (id3->elapsed / 1000);
1654         }
1655     }
1656     else if (id3->bitrate)
1657         pos = id3->elapsed * (id3->bitrate / 8);
1658     else
1659         return -1;
1660
1661     pos += id3->first_frame_offset;
1662
1663     /* Don't seek right to the end of the file so that we can
1664        transition properly to the next song */
1665     if (pos >= (int)(id3->filesize - id3->id3v1len))
1666         pos = id3->filesize - id3->id3v1len - 1;
1667
1668     return pos;
1669 }
1670
1671 static off_t codec_mp3_get_filepos_callback(int newtime)
1672 {
1673     off_t newpos;
1674
1675     CUR_TI->id3.elapsed = newtime;
1676     newpos = codec_get_file_pos();
1677
1678     return newpos;
1679 }
1680
1681 static void codec_seek_complete_callback(void)
1682 {
1683     logf("seek_complete");
1684     if (pcm_is_paused())
1685     {
1686         /* If this is not a seamless seek, clear the buffer */
1687         pcmbuf_play_stop();
1688         dsp_configure(DSP_FLUSH, 0);
1689
1690         /* If playback was not 'deliberately' paused, unpause now */
1691         if (!paused)
1692             pcmbuf_pause(false);
1693     }
1694     ci.seek_time = 0;
1695 }
1696
1697 static bool codec_seek_buffer_callback(size_t newpos)
1698 {
1699     int difference;
1700
1701     logf("codec_seek_buffer_callback");
1702
1703     if (newpos >= CUR_TI->filesize)
1704         newpos = CUR_TI->filesize - 1;
1705
1706     difference = newpos - ci.curpos;
1707     if (difference >= 0)
1708     {
1709         /* Seeking forward */
1710         logf("seek: +%d", difference);
1711         codec_advance_buffer_callback(difference);
1712         return true;
1713     }
1714
1715     /* Seeking backward */
1716     difference = -difference;
1717     if (ci.curpos - difference < 0)
1718         difference = ci.curpos;
1719
1720     /* We need to reload the song. */
1721     if (newpos < CUR_TI->start_pos)
1722     {
1723         intptr_t result = Q_CODEC_REQUEST_FAILED;
1724
1725         if (!ci.stop_codec)
1726         {
1727             LOGFQUEUE("codec >| audio Q_AUDIO_REBUFFER_SEEK");
1728             result = queue_send(&audio_queue, Q_AUDIO_REBUFFER_SEEK,
1729                                 newpos);
1730         }
1731
1732         switch (result)
1733         {
1734             case Q_CODEC_REQUEST_COMPLETE:
1735                 LOGFQUEUE("codec |< Q_CODEC_REQUEST_COMPLETE");
1736                 return true;
1737
1738             case Q_CODEC_REQUEST_FAILED:
1739                 LOGFQUEUE("codec |< Q_CODEC_REQUEST_FAILED");
1740                 ci.stop_codec = true;
1741                 return false;
1742
1743             default:
1744                 LOGFQUEUE("codec |< default");
1745                 return false;
1746         }
1747     }
1748
1749     /* Seeking inside buffer space. */
1750     logf("seek: -%d", difference);
1751     CUR_TI->available += difference;
1752     buf_ridx = RINGBUF_SUB(buf_ridx, (unsigned)difference);
1753     ci.curpos -= difference;
1754
1755     return true;
1756 }
1757
1758 static void codec_configure_callback(int setting, intptr_t value)
1759 {
1760     switch (setting) {
1761     case CODEC_SET_FILEBUF_WATERMARK:
1762         conf_watermark = value;
1763         set_filebuf_watermark(buffer_margin);
1764         break;
1765
1766     case CODEC_SET_FILEBUF_CHUNKSIZE:
1767         conf_filechunk = value;
1768         break;
1769
1770     case CODEC_SET_FILEBUF_PRESEEK:
1771         conf_preseek = value;
1772         break;
1773
1774     default:
1775         if (!dsp_configure(setting, value)) { logf("Illegal key:%d", setting); }
1776     }
1777 }
1778
1779 static void codec_track_changed(void)
1780 {
1781     automatic_skip = false;
1782     LOGFQUEUE("codec > audio Q_AUDIO_TRACK_CHANGED");
1783     queue_post(&audio_queue, Q_AUDIO_TRACK_CHANGED, 0);
1784 }
1785
1786 static void codec_pcmbuf_track_changed_callback(void)
1787 {
1788     pcmbuf_set_position_callback(NULL);
1789     codec_track_changed();
1790 }
1791
1792 static void codec_discard_codec_callback(void)
1793 {
1794     if (CUR_TI->has_codec)
1795     {
1796         CUR_TI->has_codec = false;
1797         buf_ridx = RINGBUF_ADD(buf_ridx, CUR_TI->codecsize);
1798     }
1799
1800 #if 0
1801     /* Check if a buffer desync has happened, log it and stop playback. */
1802     if (buf_ridx != CUR_TI->buf_idx)
1803     {
1804         int offset = CUR_TI->buf_idx - buf_ridx;
1805         size_t new_used = FILEBUFUSED - offset;
1806
1807         logf("Buf off :%d=%d-%d", offset, CUR_TI->buf_idx, buf_ridx);
1808         logf("Used off:%d",FILEBUFUSED - new_used);
1809
1810         /* This is a fatal internal error and it's not safe to
1811          * continue playback. */
1812         ci.stop_codec = true;
1813         queue_post(&audio_queue, Q_AUDIO_STOP, 0);
1814     }
1815 #endif
1816 }
1817
1818 static inline void codec_gapless_track_change(void) {
1819     /* callback keeps the progress bar moving while the pcmbuf empties */
1820     pcmbuf_set_position_callback(codec_pcmbuf_position_callback);
1821     /* set the pcmbuf callback for when the track really changes */
1822     pcmbuf_set_event_handler(codec_pcmbuf_track_changed_callback);
1823 }
1824
1825 static inline void codec_crossfade_track_change(void) {
1826     /* Initiate automatic crossfade mode */
1827     pcmbuf_crossfade_init(false);
1828     /* Notify the wps that the track change starts now */
1829     codec_track_changed();
1830 }
1831
1832 static void codec_track_skip_done(bool was_manual)
1833 {
1834     int crossfade_mode = global_settings.crossfade;
1835
1836     /* Manual track change (always crossfade or flush audio). */
1837     if (was_manual)
1838     {
1839         pcmbuf_crossfade_init(true);
1840         LOGFQUEUE("codec > audio Q_AUDIO_TRACK_CHANGED");
1841         queue_post(&audio_queue, Q_AUDIO_TRACK_CHANGED, 0);
1842     }
1843     /* Automatic track change w/crossfade, if not in "Track Skip Only" mode. */
1844     else if (pcmbuf_is_crossfade_enabled() && !pcmbuf_is_crossfade_active()
1845              && crossfade_mode != CROSSFADE_ENABLE_TRACKSKIP)
1846     {
1847         if (crossfade_mode == CROSSFADE_ENABLE_SHUFFLE_AND_TRACKSKIP)
1848         {
1849             if (global_settings.playlist_shuffle)
1850                 /* shuffle mode is on, so crossfade: */
1851                 codec_crossfade_track_change();
1852             else
1853                 /* shuffle mode is off, so do a gapless track change */
1854                 codec_gapless_track_change();
1855         }
1856         else
1857             /* normal crossfade:  */
1858             codec_crossfade_track_change();
1859     }
1860     else
1861         /* normal gapless playback. */
1862         codec_gapless_track_change();
1863 }
1864
1865 static bool codec_load_next_track(void)
1866 {
1867     intptr_t result = Q_CODEC_REQUEST_FAILED;
1868
1869     prev_track_elapsed = CUR_TI->id3.elapsed;
1870
1871     if (ci.seek_time)
1872         codec_seek_complete_callback();
1873
1874 #ifdef AB_REPEAT_ENABLE
1875     ab_end_of_track_report();
1876 #endif
1877
1878     logf("Request new track");
1879
1880     if (ci.new_track == 0)
1881     {
1882         ci.new_track++;
1883         automatic_skip = true;
1884     }
1885
1886     if (!ci.stop_codec)
1887     {
1888         trigger_cpu_boost();
1889         LOGFQUEUE("codec >| audio Q_AUDIO_CHECK_NEW_TRACK");
1890         result = queue_send(&audio_queue, Q_AUDIO_CHECK_NEW_TRACK, 0);
1891     }
1892
1893     switch (result)
1894     {
1895         case Q_CODEC_REQUEST_COMPLETE:
1896             LOGFQUEUE("codec |< Q_CODEC_REQUEST_COMPLETE");
1897             codec_track_skip_done(!automatic_skip);
1898             return true;
1899
1900         case Q_CODEC_REQUEST_FAILED:
1901             LOGFQUEUE("codec |< Q_CODEC_REQUEST_FAILED");
1902             ci.new_track = 0;
1903             ci.stop_codec = true;
1904             return false;
1905
1906         default:
1907             LOGFQUEUE("codec |< default");
1908             ci.stop_codec = true;
1909             return false;
1910     }
1911 }
1912
1913 static bool codec_request_next_track_callback(void)
1914 {
1915     int prev_codectype;
1916
1917     if (ci.stop_codec || !playing)
1918         return false;
1919
1920     prev_codectype = get_codec_base_type(CUR_TI->id3.codectype);
1921
1922     if (!codec_load_next_track())
1923         return false;
1924
1925     /* Check if the next codec is the same file. */
1926     if (prev_codectype == get_codec_base_type(CUR_TI->id3.codectype))
1927     {
1928         logf("New track loaded");
1929         codec_discard_codec_callback();
1930         return true;
1931     }
1932     else
1933     {
1934         logf("New codec:%d/%d", CUR_TI->id3.codectype, prev_codectype);
1935         return false;
1936     }
1937 }
1938
1939 static void codec_thread(void)
1940 {
1941     struct event ev;
1942     int status;
1943     size_t wrap;
1944
1945     while (1) {
1946         status = 0;
1947         queue_wait(&codec_queue, &ev);
1948
1949         switch (ev.id) {
1950             case Q_CODEC_LOAD_DISK:
1951                 LOGFQUEUE("codec < Q_CODEC_LOAD_DISK");
1952                 audio_codec_loaded = true;
1953 #ifdef PLAYBACK_VOICE
1954                 /* Don't sent messages to voice codec if it's already swapped
1955                    out or it will never get this */
1956                 if (voice_codec_loaded && current_codec == CODEC_IDX_VOICE)
1957                 {
1958                     LOGFQUEUE("codec > voice Q_AUDIO_PLAY");
1959                     queue_post(&voice_queue, Q_AUDIO_PLAY, 0);
1960                 }
1961                 mutex_lock(&mutex_codecthread);
1962 #endif
1963                 set_current_codec(CODEC_IDX_AUDIO);
1964                 ci.stop_codec = false;
1965                 status = codec_load_file((const char *)ev.data, &ci);
1966 #ifdef PLAYBACK_VOICE
1967                 mutex_unlock(&mutex_codecthread);
1968 #endif
1969                 break ;
1970
1971             case Q_CODEC_LOAD:
1972                 LOGFQUEUE("codec < Q_CODEC_LOAD");
1973                 if (!CUR_TI->has_codec) {
1974                     logf("Codec slot is empty!");
1975                     /* Wait for the pcm buffer to go empty */
1976                     while (pcm_is_playing())
1977                         yield();
1978                     /* This must be set to prevent an infinite loop */
1979                     ci.stop_codec = true;
1980                     LOGFQUEUE("codec > codec Q_AUDIO_PLAY");
1981                     queue_post(&codec_queue, Q_AUDIO_PLAY, 0);
1982                     break ;
1983                 }
1984
1985                 audio_codec_loaded = true;
1986 #ifdef PLAYBACK_VOICE
1987                 if (voice_codec_loaded && current_codec == CODEC_IDX_VOICE)
1988                 {
1989                     LOGFQUEUE("codec > voice Q_AUDIO_PLAY");
1990                     queue_post(&voice_queue, Q_AUDIO_PLAY, 0);
1991                 }
1992                 mutex_lock(&mutex_codecthread);
1993 #endif
1994                 set_current_codec(CODEC_IDX_AUDIO);
1995                 ci.stop_codec = false;
1996                 wrap = (size_t)&filebuf[filebuflen] - (size_t)CUR_TI->codecbuf;
1997                 status = codec_load_ram(CUR_TI->codecbuf, CUR_TI->codecsize,
1998                         &filebuf[0], wrap, &ci);
1999 #ifdef PLAYBACK_VOICE
2000                 mutex_unlock(&mutex_codecthread);
2001 #endif
2002                 break ;
2003
2004 #ifdef AUDIO_HAVE_RECORDING
2005             case Q_ENCODER_LOAD_DISK:
2006                 LOGFQUEUE("codec < Q_ENCODER_LOAD_DISK");
2007                 audio_codec_loaded = false; /* Not audio codec! */
2008 #ifdef PLAYBACK_VOICE
2009                 if (voice_codec_loaded && current_codec == CODEC_IDX_VOICE)
2010                 {
2011                     LOGFQUEUE("codec > voice Q_ENCODER_RECORD");
2012                     queue_post(&voice_queue, Q_ENCODER_RECORD, 0);
2013                 }
2014                 mutex_lock(&mutex_codecthread);
2015 #endif
2016                 logf("loading encoder");
2017                 set_current_codec(CODEC_IDX_AUDIO);
2018                 ci.stop_encoder = false;
2019                 status = codec_load_file((const char *)ev.data, &ci);
2020 #ifdef PLAYBACK_VOICE
2021                 mutex_unlock(&mutex_codecthread);
2022 #endif
2023                 logf("encoder stopped");
2024                 break;
2025 #endif /* AUDIO_HAVE_RECORDING */
2026
2027 #ifndef SIMULATOR
2028             case SYS_USB_CONNECTED:
2029                 LOGFQUEUE("codec < SYS_USB_CONNECTED");
2030                 queue_clear(&codec_queue);
2031                 usb_acknowledge(SYS_USB_CONNECTED_ACK);
2032                 usb_wait_for_disconnect(&codec_queue);
2033                 break;
2034 #endif
2035
2036             default:
2037                 LOGFQUEUE("codec < default");
2038         }
2039
2040         if (audio_codec_loaded)
2041         {
2042             if (ci.stop_codec)
2043             {
2044                 status = CODEC_OK;
2045                 if (!playing)
2046                     pcmbuf_play_stop();
2047
2048             }
2049             audio_codec_loaded = false;
2050         }
2051
2052         switch (ev.id) {
2053             case Q_CODEC_LOAD_DISK:
2054             case Q_CODEC_LOAD:
2055                 LOGFQUEUE("codec < Q_CODEC_LOAD");
2056                 if (playing)
2057                 {
2058                     if (ci.new_track || status != CODEC_OK)
2059                     {
2060                         if (!ci.new_track)
2061                         {
2062                             logf("Codec failure");
2063                             gui_syncsplash(HZ*2, "Codec failure");
2064                         }
2065
2066                         if (!codec_load_next_track())
2067                         {
2068                             LOGFQUEUE("codec > audio Q_AUDIO_STOP");
2069                             /* End of playlist */
2070                             queue_post(&audio_queue, Q_AUDIO_STOP, 0);
2071                             break;
2072                         }
2073                     }
2074                     else
2075                     {
2076                         logf("Codec finished");
2077                         if (ci.stop_codec)
2078                         {
2079                             /* Wait for the audio to stop playing before
2080                              * triggering the WPS exit */
2081                             while(pcm_is_playing())
2082                             {
2083                                 CUR_TI->id3.elapsed =
2084                                     CUR_TI->id3.length - pcmbuf_get_latency();
2085                                 sleep(1);
2086                             }
2087                             LOGFQUEUE("codec > audio Q_AUDIO_STOP");
2088                             /* End of playlist */
2089                             queue_post(&audio_queue, Q_AUDIO_STOP, 0);
2090                             break;
2091                         }
2092                     }
2093
2094                     if (CUR_TI->has_codec)
2095                     {
2096                         LOGFQUEUE("codec > codec Q_CODEC_LOAD");
2097                         queue_post(&codec_queue, Q_CODEC_LOAD, 0);
2098                     }
2099                     else
2100                     {
2101                         const char *codec_fn =
2102                             get_codec_filename(CUR_TI->id3.codectype);
2103                         LOGFQUEUE("codec > codec Q_CODEC_LOAD_DISK");
2104                         queue_post(&codec_queue, Q_CODEC_LOAD_DISK,
2105                             (intptr_t)codec_fn);
2106                     }
2107                 }
2108                 break;
2109
2110 #ifdef AUDIO_HAVE_RECORDING
2111             case Q_ENCODER_LOAD_DISK:
2112                 LOGFQUEUE("codec < Q_ENCODER_LOAD_DISK");
2113
2114                 if (status == CODEC_OK)
2115                     break;
2116
2117                 logf("Encoder failure");
2118                 gui_syncsplash(HZ*2, "Encoder failure");
2119
2120                 if (ci.enc_codec_loaded < 0)
2121                     break;
2122
2123                 logf("Encoder failed to load");
2124                 ci.enc_codec_loaded = -1;
2125                 break;
2126 #endif /* AUDIO_HAVE_RECORDING */
2127
2128             default:
2129                 LOGFQUEUE("codec < default");
2130
2131         } /* end switch */
2132     }
2133 }
2134
2135
2136 /* --- Audio thread --- */
2137
2138 static bool audio_filebuf_is_lowdata(void)
2139 {
2140     return FILEBUFUSED < AUDIO_FILEBUF_CRITICAL;
2141 }
2142
2143 static bool audio_have_tracks(void)
2144 {
2145     return track_ridx != track_widx || CUR_TI->filesize;
2146 }
2147
2148 static bool audio_have_free_tracks(void)
2149 {
2150     if (track_widx < track_ridx)
2151         return track_widx + 1 < track_ridx;
2152     else if (track_ridx == 0)
2153         return track_widx < MAX_TRACK - 1;
2154
2155     return true;
2156 }
2157
2158 int audio_track_count(void)
2159 {
2160     if (audio_have_tracks())
2161     {
2162         int relative_track_widx = track_widx;
2163
2164         if (track_ridx > track_widx)
2165             relative_track_widx += MAX_TRACK;
2166
2167         return relative_track_widx - track_ridx + 1;
2168     }
2169
2170     return 0;
2171 }
2172
2173 long audio_filebufused(void)
2174 {
2175     return (long) FILEBUFUSED;
2176 }
2177
2178 /* Count the data BETWEEN the selected tracks */
2179 static size_t audio_buffer_count_tracks(int from_track, int to_track)
2180 {
2181     size_t amount = 0;
2182     bool need_wrap = to_track < from_track;
2183
2184     while (1)
2185     {
2186         if (++from_track >= MAX_TRACK)
2187         {
2188             from_track -= MAX_TRACK;
2189             need_wrap = false;
2190         }
2191
2192         if (from_track >= to_track && !need_wrap)
2193             break;
2194
2195         amount += tracks[from_track].codecsize + tracks[from_track].filesize;
2196     }
2197     return amount;
2198 }
2199
2200 static bool audio_buffer_wind_forward(int new_track_ridx, int old_track_ridx)
2201 {
2202     size_t amount;
2203
2204     /* Start with the remainder of the previously playing track */
2205     amount = tracks[old_track_ridx].filesize - ci.curpos;
2206     /* Then collect all data from tracks in between them */
2207     amount += audio_buffer_count_tracks(old_track_ridx, new_track_ridx);
2208     logf("bwf:%ldB", (long) amount);
2209
2210     if (amount > FILEBUFUSED)
2211         return false;
2212
2213     /* Wind the buffer to the beginning of the target track or its codec */
2214     buf_ridx = RINGBUF_ADD(buf_ridx, amount);
2215
2216     return true;
2217 }
2218
2219 static bool audio_buffer_wind_backward(int new_track_ridx, int old_track_ridx)
2220 {
2221     /* Available buffer data */
2222     size_t buf_back;
2223     /* Start with the previously playing track's data and our data */
2224     size_t amount;
2225
2226     amount = ci.curpos;
2227     buf_back = RINGBUF_SUB(buf_ridx, buf_widx);
2228
2229     /* If we're not just resetting the current track */
2230     if (new_track_ridx != old_track_ridx)
2231     {
2232         /* Need to wind to before the old track's codec and our filesize */
2233         amount += tracks[old_track_ridx].codecsize;
2234         amount += tracks[new_track_ridx].filesize;
2235
2236         /* Rewind the old track to its beginning */
2237         tracks[old_track_ridx].available =
2238             tracks[old_track_ridx].filesize - tracks[old_track_ridx].filerem;
2239     }
2240
2241     /* If the codec was ever buffered */
2242     if (tracks[new_track_ridx].codecsize)
2243     {
2244         /* Add the codec to the needed size */
2245         amount += tracks[new_track_ridx].codecsize;
2246         tracks[new_track_ridx].has_codec = true;
2247     }
2248
2249     /* Then collect all data from tracks between new and old */
2250     amount += audio_buffer_count_tracks(new_track_ridx, old_track_ridx);
2251
2252     /* Do we have space to make this skip? */
2253     if (amount > buf_back)
2254         return false;
2255
2256     logf("bwb:%ldB",amount);
2257
2258     /* Rewind the buffer to the beginning of the target track or its codec */
2259     buf_ridx = RINGBUF_SUB(buf_ridx, amount);
2260
2261     /* Reset to the beginning of the new track */
2262     tracks[new_track_ridx].available = tracks[new_track_ridx].filesize;
2263
2264     return true;
2265 }
2266
2267 static void audio_update_trackinfo(void)
2268 {
2269     ci.filesize = CUR_TI->filesize;
2270     CUR_TI->id3.elapsed = 0;
2271     CUR_TI->id3.offset = 0;
2272     ci.id3 = &CUR_TI->id3;
2273     ci.curpos = 0;
2274     ci.taginfo_ready = &CUR_TI->taginfo_ready;
2275 }
2276
2277 /* Yield to codecs for as long as possible if they are in need of data
2278  * return true if the caller should break to let the audio thread process
2279  * new events */
2280 static bool audio_yield_codecs(void)
2281 {
2282     yield();
2283
2284     if (!queue_empty(&audio_queue))
2285         return true;
2286
2287     while ((pcmbuf_is_crossfade_active() || pcmbuf_is_lowdata())
2288             && !ci.stop_codec && playing && !audio_filebuf_is_lowdata())
2289     {
2290         if (filling)
2291             yield();
2292         else
2293             sleep(2);
2294
2295         if (!queue_empty(&audio_queue))
2296             return true;
2297     }
2298
2299     return false;
2300 }
2301
2302 static void audio_clear_track_entries(bool clear_unbuffered)
2303 {
2304     int cur_idx = track_widx;
2305     int last_idx = -1;
2306
2307     logf("Clearing tracks:%d/%d, %d", track_ridx, track_widx, clear_unbuffered);
2308
2309     /* Loop over all tracks from write-to-read */
2310     while (1)
2311     {
2312         cur_idx++;
2313         cur_idx &= MAX_TRACK_MASK;
2314
2315         if (cur_idx == track_ridx)
2316             break;
2317
2318         /* If the track is buffered, conditionally clear/notify,
2319          * otherwise clear the track if that option is selected */
2320         if (tracks[cur_idx].event_sent)
2321         {
2322             if (last_idx >= 0)
2323             {
2324                 /* If there is an unbuffer callback, call it, otherwise,
2325                  * just clear the track */
2326                 if (track_unbuffer_callback)
2327                     track_unbuffer_callback(&tracks[last_idx].id3, false);
2328
2329                 memset(&tracks[last_idx], 0, sizeof(struct track_info));
2330             }
2331             last_idx = cur_idx;
2332         }
2333         else if (clear_unbuffered)
2334             memset(&tracks[cur_idx], 0, sizeof(struct track_info));
2335     }
2336
2337     /* We clear the previous instance of a buffered track throughout
2338      * the above loop to facilitate 'last' detection.  Clear/notify
2339      * the last track here */
2340     if (last_idx >= 0)
2341     {
2342         if (track_unbuffer_callback)
2343             track_unbuffer_callback(&tracks[last_idx].id3, true);
2344         memset(&tracks[last_idx], 0, sizeof(struct track_info));
2345     }
2346 }
2347
2348 /* FIXME: This code should be made more generic and move to metadata.c */
2349 static void audio_strip_tags(void)
2350 {
2351     int i;
2352     static const unsigned char tag[] = "TAG";
2353     static const unsigned char apetag[] = "APETAGEX";
2354     size_t tag_idx;
2355     size_t cur_idx;
2356     size_t len, version;
2357
2358     tag_idx = RINGBUF_SUB(buf_widx, 128);
2359
2360     if (FILEBUFUSED > 128 && tag_idx > buf_ridx)
2361     {
2362         cur_idx = tag_idx;
2363         for(i = 0;i < 3;i++)
2364         {
2365             if(filebuf[cur_idx] != tag[i])
2366                 goto strip_ape_tag;
2367
2368             cur_idx = RINGBUF_ADD(cur_idx, 1);
2369         }
2370
2371         /* Skip id3v1 tag */
2372         logf("Skipping ID3v1 tag");
2373         buf_widx = tag_idx;
2374         tracks[track_widx].available -= 128;
2375         tracks[track_widx].filesize -= 128;
2376     }
2377
2378 strip_ape_tag:
2379     /* Check for APE tag (look for the APE tag footer) */
2380     tag_idx = RINGBUF_SUB(buf_widx, 32);
2381
2382     if (FILEBUFUSED > 32 && tag_idx > buf_ridx)
2383     {
2384         cur_idx = tag_idx;
2385         for(i = 0;i < 8;i++)
2386         {
2387             if(filebuf[cur_idx] != apetag[i])
2388                 return;
2389
2390             cur_idx = RINGBUF_ADD(cur_idx, 1);
2391         }
2392
2393         /* Read the version and length from the footer */
2394         version = filebuf[tag_idx+8] | (filebuf[tag_idx+9] << 8) |
2395                   (filebuf[tag_idx+10] << 16) | (filebuf[tag_idx+11] << 24);
2396         len = filebuf[tag_idx+12] | (filebuf[tag_idx+13] << 8) |
2397               (filebuf[tag_idx+14] << 16) | (filebuf[tag_idx+15] << 24);
2398         if (version == 2000)
2399             len += 32; /* APEv2 has a 32 byte header */
2400
2401         /* Skip APE tag */
2402         if (FILEBUFUSED > len)
2403         {
2404             logf("Skipping APE tag (%ldB)", len);
2405             buf_widx = RINGBUF_SUB(buf_widx, len);
2406             tracks[track_widx].available -= len;
2407             tracks[track_widx].filesize -= len;
2408         }
2409     }
2410 }
2411
2412 /* Returns true if a whole file is read, false otherwise */
2413 static bool audio_read_file(size_t minimum)
2414 {
2415     bool ret_val = false;
2416
2417     /* If we're called and no file is open, this is an error */
2418     if (current_fd < 0)
2419     {
2420         logf("Bad fd in arf");
2421         /* Give some hope of miraculous recovery by forcing a track reload */
2422         tracks[track_widx].filesize = 0;
2423         /* Stop this buffering run */
2424         return ret_val;
2425     }
2426
2427     trigger_cpu_boost();
2428     while (tracks[track_widx].filerem > 0)
2429     {
2430         size_t copy_n;
2431         int overlap;
2432         int rc;
2433
2434         /* copy_n is the largest chunk that is safe to read */
2435         copy_n = MIN(conf_filechunk, filebuflen - buf_widx);
2436
2437         /* buf_widx == buf_ridx is defined as buffer empty, not buffer full */
2438         if (RINGBUF_ADD_CROSS(buf_widx,copy_n,buf_ridx) >= 0)
2439             break;
2440
2441         /* rc is the actual amount read */
2442         rc = read(current_fd, &filebuf[buf_widx], copy_n);
2443
2444         if (rc < 0)
2445         {
2446             logf("File ended %ldB early", tracks[track_widx].filerem);
2447             tracks[track_widx].filesize -= tracks[track_widx].filerem;
2448             tracks[track_widx].filerem = 0;
2449             break;
2450         }
2451
2452         /* How much of the playing track did we overwrite */
2453         if (buf_widx == CUR_TI->buf_idx)
2454         {
2455             /* Special handling; zero or full overlap? */
2456             if (track_widx == track_ridx && CUR_TI->available == 0)
2457                 overlap = 0;
2458             else
2459                 overlap = rc;
2460         }
2461         else
2462             overlap = RINGBUF_ADD_CROSS(buf_widx,rc,CUR_TI->buf_idx);
2463
2464         if ((unsigned)rc > tracks[track_widx].filerem)
2465         {
2466             logf("Bad: rc-filerem=%ld, fixing", rc-tracks[track_widx].filerem);
2467             tracks[track_widx].filesize += rc - tracks[track_widx].filerem;
2468             tracks[track_widx].filerem = rc;
2469         }
2470
2471         /* Advance buffer */
2472         buf_widx = RINGBUF_ADD(buf_widx, rc);
2473         tracks[track_widx].available += rc;
2474         tracks[track_widx].filerem -= rc;
2475
2476         /* If we write into the playing track, adjust it's buffer info */
2477         if (overlap > 0)
2478         {
2479             CUR_TI->buf_idx += overlap;
2480             CUR_TI->start_pos += overlap;
2481         }
2482
2483         /* For a rebuffer, fill at least this minimum */
2484         if (minimum > (unsigned)rc)
2485             minimum -= rc;
2486         /* Let the codec process up to the watermark */
2487         /* Break immediately if this is a quick buffer, or there is an event */
2488         else if (minimum || audio_yield_codecs())
2489         {
2490             /* Exit quickly, but don't stop the overall buffering process */
2491             ret_val = true;
2492             break;
2493         }
2494     }
2495
2496     if (tracks[track_widx].filerem == 0)
2497     {
2498         logf("Finished buf:%ldB", tracks[track_widx].filesize);
2499         close(current_fd);
2500         current_fd = -1;
2501         audio_strip_tags();
2502
2503         track_widx++;
2504         track_widx &= MAX_TRACK_MASK;
2505
2506         tracks[track_widx].filesize = 0;
2507         return true;
2508     }
2509     else
2510     {
2511         logf("%s buf:%ldB", ret_val?"Quick":"Partially",
2512                 tracks[track_widx].filesize - tracks[track_widx].filerem);
2513         return ret_val;
2514     }
2515 }
2516
2517 static bool audio_loadcodec(bool start_play)
2518 {
2519     size_t size = 0;
2520     int fd;
2521     int rc;
2522     size_t copy_n;
2523     int prev_track;
2524     char codec_path[MAX_PATH]; /* Full path to codec */
2525
2526     const char * codec_fn =
2527         get_codec_filename(tracks[track_widx].id3.codectype);
2528     if (codec_fn == NULL)
2529         return false;
2530
2531     tracks[track_widx].has_codec = false;
2532
2533     if (start_play)
2534     {
2535         /* Load the codec directly from disk and save some memory. */
2536         track_ridx = track_widx;
2537         ci.filesize = CUR_TI->filesize;
2538         ci.id3 = &CUR_TI->id3;
2539         ci.taginfo_ready = &CUR_TI->taginfo_ready;
2540         ci.curpos = 0;
2541         LOGFQUEUE("codec > codec Q_CODEC_LOAD_DISK");
2542         queue_post(&codec_queue, Q_CODEC_LOAD_DISK, (intptr_t)codec_fn);
2543         return true;
2544     }
2545     else
2546     {
2547         /* If we already have another track than this one buffered */
2548         if (track_widx != track_ridx)
2549         {
2550             prev_track = (track_widx - 1) & MAX_TRACK_MASK;
2551
2552             /* If the previous codec is the same as this one, there is no need
2553              * to put another copy of it on the file buffer */
2554             if (get_codec_base_type(tracks[track_widx].id3.codectype) ==
2555                     get_codec_base_type(tracks[prev_track].id3.codectype)
2556                 && audio_codec_loaded)
2557             {
2558                 logf("Reusing prev. codec");
2559                 return true;
2560             }
2561         }
2562     }
2563
2564     codec_get_full_path(codec_path, codec_fn);
2565
2566     fd = open(codec_path, O_RDONLY);
2567     if (fd < 0)
2568     {
2569         logf("Codec doesn't exist!");
2570         return false;
2571     }
2572
2573     tracks[track_widx].codecsize = filesize(fd);
2574
2575     /* Never load a partial codec */
2576     if (RINGBUF_ADD_CROSS(buf_widx,tracks[track_widx].codecsize,buf_ridx) >= 0)
2577     {
2578         logf("Not enough space");
2579         close(fd);
2580         return false;
2581     }
2582
2583     while (size < tracks[track_widx].codecsize)
2584     {
2585         copy_n = MIN(conf_filechunk, filebuflen - buf_widx);
2586         rc = read(fd, &filebuf[buf_widx], copy_n);
2587         if (rc < 0)
2588         {
2589             close(fd);
2590             /* This is an error condition, likely the codec file is corrupt */
2591             logf("Partial codec loaded");
2592             /* Must undo the buffer write of the partial codec */
2593             buf_widx = RINGBUF_SUB(buf_widx, size);
2594             tracks[track_widx].codecsize = 0;
2595             return false;
2596         }
2597
2598         buf_widx = RINGBUF_ADD(buf_widx, rc);
2599
2600         size += rc;
2601     }
2602
2603     tracks[track_widx].has_codec = true;
2604
2605     close(fd);
2606     logf("Done: %ldB", size);
2607
2608     return true;
2609 }
2610
2611 /* TODO: Copied from mpeg.c. Should be moved somewhere else. */
2612 static void audio_set_elapsed(struct mp3entry* id3)
2613 {
2614     unsigned long offset = id3->offset > id3->first_frame_offset ?
2615         id3->offset - id3->first_frame_offset : 0;
2616
2617     if ( id3->vbr ) {
2618         if ( id3->has_toc ) {
2619             /* calculate elapsed time using TOC */
2620             int i;
2621             unsigned int remainder, plen, relpos, nextpos;
2622
2623             /* find wich percent we're at */
2624             for (i=0; i<100; i++ )
2625                 if ( offset < id3->toc[i] * (id3->filesize / 256) )
2626                     break;
2627
2628             i--;
2629             if (i < 0)
2630                 i = 0;
2631
2632             relpos = id3->toc[i];
2633
2634             if (i < 99)
2635                 nextpos = id3->toc[i+1];
2636             else
2637                 nextpos = 256;
2638
2639             remainder = offset - (relpos * (id3->filesize / 256));
2640
2641             /* set time for this percent (divide before multiply to prevent
2642                overflow on long files. loss of precision is negligible on
2643                short files) */
2644             id3->elapsed = i * (id3->length / 100);
2645
2646             /* calculate remainder time */
2647             plen = (nextpos - relpos) * (id3->filesize / 256);
2648             id3->elapsed += (((remainder * 100) / plen) *
2649                              (id3->length / 10000));
2650         }
2651         else {
2652             /* no TOC exists. set a rough estimate using average bitrate */
2653             int tpk = id3->length /
2654                 ((id3->filesize - id3->first_frame_offset - id3->id3v1len) /
2655                 1024);
2656             id3->elapsed = offset / 1024 * tpk;
2657         }
2658     }
2659     else
2660     {
2661         /* constant bitrate, use exact calculation */
2662         if (id3->bitrate != 0)
2663             id3->elapsed = offset / (id3->bitrate / 8);
2664     }
2665 }
2666
2667 static bool audio_load_track(int offset, bool start_play, bool rebuffer)
2668 {
2669     char *trackname;
2670     off_t size;
2671     char msgbuf[80];
2672
2673     /* Stop buffer filling if there is no free track entries.
2674        Don't fill up the last track entry (we wan't to store next track
2675        metadata there). */
2676     if (!audio_have_free_tracks())
2677     {
2678         logf("No free tracks");
2679         return false;
2680     }
2681
2682     if (current_fd >= 0)
2683     {
2684         logf("Nonzero fd in alt");
2685         close(current_fd);
2686         current_fd = -1;
2687     }
2688
2689     last_peek_offset++;
2690     peek_again:
2691     logf("Buffering track:%d/%d", track_widx, track_ridx);
2692     /* Get track name from current playlist read position. */
2693     while ((trackname = playlist_peek(last_peek_offset)) != NULL)
2694     {
2695         /* Handle broken playlists. */
2696         current_fd = open(trackname, O_RDONLY);
2697         if (current_fd < 0)
2698         {
2699             logf("Open failed");
2700             /* Skip invalid entry from playlist. */
2701             playlist_skip_entry(NULL, last_peek_offset);
2702         }
2703         else
2704             break;
2705     }
2706
2707     if (!trackname)
2708     {
2709         logf("End-of-playlist");
2710         playlist_end = true;
2711         return false;
2712     }
2713
2714     /* Initialize track entry. */
2715     size = filesize(current_fd);
2716     tracks[track_widx].filerem = size;
2717     tracks[track_widx].filesize = size;
2718     tracks[track_widx].available = 0;
2719
2720     /* Set default values */
2721     if (start_play)
2722     {
2723         int last_codec = current_codec;
2724
2725         set_current_codec(CODEC_IDX_AUDIO);
2726         conf_watermark = AUDIO_DEFAULT_WATERMARK;
2727         conf_filechunk = AUDIO_DEFAULT_FILECHUNK;
2728         conf_preseek = AUDIO_REBUFFER_GUESS_SIZE;
2729         dsp_configure(DSP_RESET, 0);
2730         set_current_codec(last_codec);
2731     }
2732
2733     /* Get track metadata if we don't already have it. */
2734     if (!tracks[track_widx].taginfo_ready)
2735     {
2736         if (get_metadata(&tracks[track_widx],current_fd,trackname,v1first))
2737         {
2738             if (start_play)
2739             {
2740                 track_changed = true;
2741                 playlist_update_resume_info(audio_current_track());
2742             }
2743         }
2744         else
2745         {
2746             logf("mde:%s!",trackname);
2747
2748             /* Set filesize to zero to indicate no file was loaded. */
2749             tracks[track_widx].filesize = 0;
2750             tracks[track_widx].filerem = 0;
2751             close(current_fd);
2752             current_fd = -1;
2753
2754             /* Skip invalid entry from playlist. */
2755             playlist_skip_entry(NULL, last_peek_offset);
2756             tracks[track_widx].taginfo_ready = false;
2757             goto peek_again;
2758         }
2759
2760     }
2761
2762     if (cuesheet_is_enabled() && tracks[track_widx].id3.cuesheet_type == 1)
2763     {
2764         char cuepath[MAX_PATH];
2765
2766         struct cuesheet *cue = start_play ? curr_cue : temp_cue;
2767
2768         if (look_for_cuesheet_file(trackname, cuepath) &&
2769             parse_cuesheet(cuepath, cue))
2770         {
2771             strcpy((cue)->audio_filename, trackname);
2772             if (start_play)
2773                 cue_spoof_id3(curr_cue, &tracks[track_widx].id3);
2774         }
2775     }
2776
2777     /* Load the codec. */
2778     tracks[track_widx].codecbuf = &filebuf[buf_widx];
2779     if (!audio_loadcodec(start_play))
2780     {
2781         /* Set filesize to zero to indicate no file was loaded. */
2782         tracks[track_widx].filesize = 0;
2783         tracks[track_widx].filerem = 0;
2784         close(current_fd);
2785         current_fd = -1;
2786
2787         if (tracks[track_widx].codecsize)
2788         {
2789             /* No space for codec on buffer, not an error */
2790             tracks[track_widx].codecsize = 0;
2791             return false;
2792         }
2793
2794         /* This is an error condition, either no codec was found, or reading
2795          * the codec file failed part way through, either way, skip the track */
2796         snprintf(msgbuf, sizeof(msgbuf)-1, "No codec for: %s", trackname);
2797         /* We should not use gui_syncplash from audio thread! */
2798         gui_syncsplash(HZ*2, msgbuf);
2799         /* Skip invalid entry from playlist. */
2800         playlist_skip_entry(NULL, last_peek_offset);
2801         tracks[track_widx].taginfo_ready = false;
2802         goto peek_again;
2803     }
2804
2805     tracks[track_widx].start_pos = 0;
2806     set_filebuf_watermark(buffer_margin);
2807     tracks[track_widx].id3.elapsed = 0;
2808
2809     if (offset > 0)
2810     {
2811         switch (tracks[track_widx].id3.codectype) {
2812         case AFMT_MPA_L1:
2813         case AFMT_MPA_L2:
2814         case AFMT_MPA_L3:
2815             lseek(current_fd, offset, SEEK_SET);
2816             tracks[track_widx].id3.offset = offset;
2817             audio_set_elapsed(&tracks[track_widx].id3);
2818             tracks[track_widx].filerem = size - offset;
2819             ci.curpos = offset;
2820             tracks[track_widx].start_pos = offset;
2821             break;
2822
2823         case AFMT_WAVPACK:
2824             lseek(current_fd, offset, SEEK_SET);
2825             tracks[track_widx].id3.offset = offset;
2826             tracks[track_widx].id3.elapsed =
2827                 tracks[track_widx].id3.length / 2;
2828             tracks[track_widx].filerem = size - offset;
2829             ci.curpos = offset;
2830             tracks[track_widx].start_pos = offset;
2831             break;
2832
2833         case AFMT_OGG_VORBIS:
2834         case AFMT_SPEEX:
2835         case AFMT_FLAC:
2836         case AFMT_PCM_WAV:
2837         case AFMT_A52:
2838         case AFMT_AAC:
2839         case AFMT_MPC:
2840         case AFMT_APE:
2841             tracks[track_widx].id3.offset = offset;
2842             break;
2843         }
2844     }
2845
2846     logf("alt:%s", trackname);
2847     tracks[track_widx].buf_idx = buf_widx;
2848
2849     return audio_read_file(rebuffer);
2850 }
2851
2852 static bool audio_read_next_metadata(void)
2853 {
2854     int fd;
2855     char *trackname;
2856     int next_idx;
2857     int status;
2858
2859     next_idx = track_widx;
2860     if (tracks[next_idx].taginfo_ready)
2861     {
2862         next_idx++;
2863         next_idx &= MAX_TRACK_MASK;
2864
2865         if (tracks[next_idx].taginfo_ready)
2866             return true;
2867     }
2868
2869     trackname = playlist_peek(last_peek_offset + 1);
2870     if (!trackname)
2871         return false;
2872
2873     fd = open(trackname, O_RDONLY);
2874     if (fd < 0)
2875         return false;
2876
2877     status = get_metadata(&tracks[next_idx],fd,trackname,v1first);
2878     /* Preload the glyphs in the tags */
2879     if (status)
2880     {
2881         if (tracks[next_idx].id3.title)
2882             lcd_getstringsize(tracks[next_idx].id3.title, NULL, NULL);
2883         if (tracks[next_idx].id3.artist)
2884             lcd_getstringsize(tracks[next_idx].id3.artist, NULL, NULL);
2885         if (tracks[next_idx].id3.album)
2886             lcd_getstringsize(tracks[next_idx].id3.album, NULL, NULL);
2887     }
2888     close(fd);
2889
2890     return status;
2891 }
2892
2893 /* Send callback events to notify about new tracks. */
2894 static void audio_generate_postbuffer_events(void)
2895 {
2896     int cur_idx;
2897     int last_idx = -1;
2898
2899     logf("Postbuffer:%d/%d",track_ridx,track_widx);
2900
2901     if (audio_have_tracks())
2902     {
2903         cur_idx = track_ridx;
2904
2905         while (1) {
2906             if (!tracks[cur_idx].event_sent)
2907             {
2908                 if (last_idx >= 0 && !tracks[last_idx].event_sent)
2909                 {
2910                     /* Mark the event 'sent' even if we don't really send one */
2911                     tracks[last_idx].event_sent = true;
2912                     if (track_buffer_callback)
2913                         track_buffer_callback(&tracks[last_idx].id3, false);
2914                 }
2915                 last_idx = cur_idx;
2916             }
2917             if (cur_idx == track_widx)
2918                 break;
2919             cur_idx++;
2920             cur_idx &= MAX_TRACK_MASK;
2921         }
2922
2923         if (last_idx >= 0 && !tracks[last_idx].event_sent)
2924         {
2925             tracks[last_idx].event_sent = true;
2926             if (track_buffer_callback)
2927                 track_buffer_callback(&tracks[last_idx].id3, true);
2928         }
2929     }
2930 }
2931
2932 static bool audio_initialize_buffer_fill(bool clear_tracks)
2933 {
2934     /* Don't initialize if we're already initialized */
2935     if (filling)
2936         return true;
2937
2938     logf("Starting buffer fill");
2939
2940     /* Set the filling flag true before calling audio_clear_tracks as that
2941      * function can yield and we start looping. */
2942     filling = true;
2943
2944     if (clear_tracks)
2945         audio_clear_track_entries(false);
2946
2947     /* Save the current resume position once. */
2948     playlist_update_resume_info(audio_current_track());
2949
2950     return true;
2951 }
2952
2953 static void audio_fill_file_buffer(
2954         bool start_play, bool rebuffer, size_t offset)
2955 {
2956     bool had_next_track = audio_next_track() != NULL;
2957     bool continue_buffering;
2958
2959     /* Must reset the buffer before use if trashed or voice only - voice
2960        file size shouldn't have changed so we can go straight from
2961        BUFFER_STATE_VOICED_ONLY to BUFFER_STATE_INITIALIZED */
2962     if (buffer_state != BUFFER_STATE_INITIALIZED)
2963         audio_reset_buffer();
2964
2965     if (!audio_initialize_buffer_fill(!start_play))
2966         return ;
2967
2968     /* If we have a partially buffered track, continue loading,
2969      * otherwise load a new track */
2970     if (tracks[track_widx].filesize > 0)
2971         continue_buffering = audio_read_file(rebuffer);
2972     else
2973         continue_buffering = audio_load_track(offset, start_play, rebuffer);
2974
2975     if (!had_next_track && audio_next_track())
2976         track_changed = true;
2977
2978     /* If we're done buffering */
2979     if (!continue_buffering)
2980     {
2981         audio_read_next_metadata();
2982
2983         audio_generate_postbuffer_events();
2984         filling = false;
2985     }
2986 #ifndef SIMULATOR
2987     ata_sleep();
2988 #endif
2989
2990 }
2991
2992 static void audio_rebuffer(void)
2993 {
2994     logf("Forcing rebuffer");
2995
2996     /* Stop in progress fill, and clear open file descriptor */
2997     if (current_fd >= 0)
2998     {
2999         close(current_fd);
3000         current_fd = -1;
3001     }
3002     filling = false;
3003
3004     /* Reset buffer and track pointers */
3005     CUR_TI->buf_idx = buf_ridx = buf_widx = 0;
3006     track_widx = track_ridx;
3007     audio_clear_track_entries(true);
3008     CUR_TI->available = 0;
3009
3010     /* Fill the buffer */
3011     last_peek_offset = -1;
3012     CUR_TI->filesize = 0;
3013     CUR_TI->start_pos = 0;
3014     ci.curpos = 0;
3015
3016     if (!CUR_TI->taginfo_ready)
3017         memset(&CUR_TI->id3, 0, sizeof(struct mp3entry));
3018
3019     audio_fill_file_buffer(false, true, 0);
3020 }
3021
3022 static int audio_check_new_track(void)
3023 {
3024     int track_count = audio_track_count();
3025     int old_track_ridx = track_ridx;
3026     bool forward;
3027
3028     if (dir_skip)
3029     {
3030         dir_skip = false;
3031         if (playlist_next_dir(ci.new_track))
3032         {
3033             ci.new_track = 0;
3034             CUR_TI->taginfo_ready = false;
3035             audio_rebuffer();
3036             goto skip_done;
3037         }
3038         else
3039         {
3040             LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_FAILED");
3041             return Q_CODEC_REQUEST_FAILED;
3042         }
3043     }
3044
3045     if (new_playlist)
3046         ci.new_track = 0;
3047
3048     /* If the playlist isn't that big */
3049     if (!playlist_check(ci.new_track))
3050     {
3051         if (ci.new_track >= 0)
3052         {
3053             LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_FAILED");
3054             return Q_CODEC_REQUEST_FAILED;
3055         }
3056         /* Find the beginning backward if the user over-skips it */
3057         while (!playlist_check(++ci.new_track))
3058             if (ci.new_track >= 0)
3059             {
3060                 LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_FAILED");
3061                 return Q_CODEC_REQUEST_FAILED;
3062             }
3063     }
3064     /* Update the playlist */
3065     last_peek_offset -= ci.new_track;
3066
3067     if (playlist_next(ci.new_track) < 0)
3068     {
3069         LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_FAILED");
3070         return Q_CODEC_REQUEST_FAILED;
3071     }
3072
3073     if (new_playlist)
3074     {
3075         ci.new_track = 1;
3076         new_playlist = false;
3077     }
3078
3079     /* Save the old track */
3080     prev_ti = CUR_TI;
3081
3082     /* Move to the new track */
3083     track_ridx += ci.new_track;
3084     track_ridx &= MAX_TRACK_MASK;
3085
3086     if (automatic_skip)
3087         playlist_end = false;
3088
3089     track_changed = !automatic_skip;
3090
3091     /* If it is not safe to even skip this many track entries */
3092     if (ci.new_track >= track_count || ci.new_track <= track_count - MAX_TRACK)
3093     {
3094         ci.new_track = 0;
3095         CUR_TI->taginfo_ready = false;
3096         audio_rebuffer();
3097         goto skip_done;
3098     }
3099
3100     forward = ci.new_track > 0;
3101     ci.new_track = 0;
3102
3103     /* If the target track is clearly not in memory */
3104     if (CUR_TI->filesize == 0 || !CUR_TI->taginfo_ready)
3105     {
3106         audio_rebuffer();
3107         goto skip_done;
3108     }
3109
3110     /* The track may be in memory, see if it really is */
3111     if (forward)
3112     {
3113         if (!audio_buffer_wind_forward(track_ridx, old_track_ridx))
3114             audio_rebuffer();
3115     }
3116     else
3117     {
3118         int cur_idx = track_ridx;
3119         bool taginfo_ready = true;
3120         bool wrap = track_ridx > old_track_ridx;
3121
3122         while (1)
3123         {
3124             cur_idx++;
3125             cur_idx &= MAX_TRACK_MASK;
3126             if (!(wrap || cur_idx < old_track_ridx))
3127                 break;
3128
3129             /* If we hit a track in between without valid tag info, bail */
3130             if (!tracks[cur_idx].taginfo_ready)
3131             {
3132                 taginfo_ready = false;
3133                 break;
3134             }
3135
3136             tracks[cur_idx].available = tracks[cur_idx].filesize;
3137             if (tracks[cur_idx].codecsize)
3138                 tracks[cur_idx].has_codec = true;
3139         }
3140         if (taginfo_ready)
3141         {
3142             if (!audio_buffer_wind_backward(track_ridx, old_track_ridx))
3143                 audio_rebuffer();
3144         }
3145         else
3146         {
3147             CUR_TI->taginfo_ready = false;
3148             audio_rebuffer();
3149         }
3150     }
3151
3152 skip_done:
3153     audio_update_trackinfo();
3154     LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_COMPLETE");
3155     return Q_CODEC_REQUEST_COMPLETE;
3156 }
3157
3158 static int audio_rebuffer_and_seek(size_t newpos)
3159 {
3160     size_t real_preseek;
3161     int fd;
3162     char *trackname;
3163
3164     /* (Re-)open current track's file handle. */
3165     trackname = playlist_peek(0);
3166     fd = open(trackname, O_RDONLY);
3167     if (fd < 0)
3168     {
3169         LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_FAILED");
3170         return Q_CODEC_REQUEST_FAILED;
3171     }
3172
3173     if (current_fd >= 0)
3174         close(current_fd);
3175     current_fd = fd;
3176
3177     playlist_end = false;
3178
3179     ci.curpos = newpos;
3180
3181     /* Clear codec buffer. */
3182     track_widx = track_ridx;
3183     tracks[track_widx].buf_idx = buf_widx = buf_ridx = 0;
3184
3185     last_peek_offset = 0;
3186     filling = false;
3187     audio_initialize_buffer_fill(true);
3188
3189     /* This may have been tweaked by the id3v1 code */
3190     CUR_TI->filesize=filesize(fd);
3191     if (newpos > conf_preseek)
3192     {
3193         CUR_TI->start_pos = newpos - conf_preseek;
3194         lseek(current_fd, CUR_TI->start_pos, SEEK_SET);
3195         CUR_TI->filerem = CUR_TI->filesize - CUR_TI->start_pos;
3196         real_preseek = conf_preseek;
3197     }
3198     else
3199     {
3200         CUR_TI->start_pos = 0;
3201         CUR_TI->filerem = CUR_TI->filesize;
3202         real_preseek = newpos;
3203     }
3204
3205     CUR_TI->available = 0;
3206
3207     audio_read_file(real_preseek);
3208
3209     /* Account for the data we just read that is 'behind' us now */
3210     CUR_TI->available -= real_preseek;
3211
3212     buf_ridx = RINGBUF_ADD(buf_ridx, real_preseek);
3213
3214     LOGFQUEUE("audio >|= codec Q_CODEC_REQUEST_COMPLETE");
3215     return Q_CODEC_REQUEST_COMPLETE;
3216 }
3217
3218 void audio_set_track_buffer_event(void (*handler)(struct mp3entry *id3,
3219                                                   bool last_track))
3220 {
3221     track_buffer_callback = handler;
3222 }
3223
3224 void audio_set_track_unbuffer_event(void (*handler)(struct mp3entry *id3,
3225                                                     bool last_track))
3226 {
3227     track_unbuffer_callback = handler;
3228 }
3229
3230 void audio_set_track_changed_event(void (*handler)(struct mp3entry *id3))
3231 {
3232     track_changed_callback = handler;
3233 }
3234
3235 unsigned long audio_prev_elapsed(void)
3236 {
3237     return prev_track_elapsed;
3238 }
3239
3240 static void audio_stop_codec_flush(void)
3241 {
3242     ci.stop_codec = true;
3243     pcmbuf_pause(true);
3244
3245     while (audio_codec_loaded)
3246         yield();
3247
3248     /* If the audio codec is not loaded any more, and the audio is still
3249      * playing, it is now and _only_ now safe to call this function from the
3250      * audio thread */
3251     if (pcm_is_playing())
3252         pcmbuf_play_stop();
3253     pcmbuf_pause(paused);
3254 }
3255
3256 static void audio_stop_playback(void)
3257 {
3258     /* If we were playing, save resume information */
3259     if (playing)
3260     {
3261         struct mp3entry *id3 = NULL;
3262
3263         if (!playlist_end || !ci.stop_codec)
3264         {
3265             /* Set this early, the outside code yields and may allow the codec
3266                to try to wait for a reply on a buffer wait */
3267             ci.stop_codec = true;
3268             id3 = audio_current_track();
3269         }
3270
3271         /* Save the current playing spot, or NULL if the playlist has ended */
3272         playlist_update_resume_info(id3);
3273
3274         prev_track_elapsed = CUR_TI->id3.elapsed;
3275
3276         /* Increment index so runtime info is saved in audio_clear_track_entries().
3277          * Done here, as audio_stop_playback() may be called more than once.
3278          * Don't update runtime unless playback is stopped because of end of playlist.
3279          * Updating runtime when manually stopping a tracks, can destroy autoscores
3280          * and playcounts.
3281          */
3282         if (playlist_end)
3283         {
3284             track_ridx++;
3285             track_ridx &= MAX_TRACK_MASK;
3286         }
3287     }
3288
3289     filling = false;
3290     paused = false;
3291     audio_stop_codec_flush();
3292     playing = false;
3293
3294     if (current_fd >= 0)
3295     {
3296         close(current_fd);
3297         current_fd = -1;
3298     }
3299
3300     /* Mark all entries null. */
3301     audio_clear_track_entries(false);
3302 }
3303
3304 static void audio_play_start(size_t offset)
3305 {
3306 #if INPUT_SRC_CAPS != 0
3307     audio_set_input_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK);
3308     audio_set_output_source(AUDIO_SRC_PLAYBACK);
3309 #endif
3310
3311     /* Wait for any previously playing audio to flush - TODO: Not necessary? */
3312     paused = false;
3313     audio_stop_codec_flush();
3314
3315     track_changed = true;
3316     playlist_end = false;
3317
3318     playing = true;
3319
3320     ci.new_track = 0;
3321     ci.seek_time = 0;
3322     wps_offset = 0;
3323
3324     if (current_fd >= 0)
3325     {
3326         close(current_fd);
3327         current_fd = -1;
3328     }
3329
3330     sound_set_volume(global_settings.volume);
3331     track_widx = track_ridx = 0;
3332     buf_ridx = buf_widx = 0;
3333
3334     /* Mark all entries null. */
3335     memset(tracks, 0, sizeof(struct track_info) * MAX_TRACK);
3336
3337     last_peek_offset = -1;
3338
3339     /* Officially playing */
3340     queue_reply(&audio_queue, 1);
3341
3342     audio_fill_file_buffer(true, false, offset);
3343 }
3344
3345
3346 /* Invalidates all but currently playing track. */
3347 static void audio_invalidate_tracks(void)
3348 {
3349     if (audio_have_tracks()) {
3350         last_peek_offset = 0;
3351
3352         playlist_end = false;
3353         track_widx = track_ridx;
3354         /* Mark all other entries null (also buffered wrong metadata). */
3355         audio_clear_track_entries(true);
3356
3357         /* If the current track is fully buffered, advance the write pointer */
3358         if (tracks[track_widx].filerem == 0)
3359             track_widx = (track_widx + 1) & MAX_TRACK_MASK;
3360
3361         buf_widx = RINGBUF_ADD(buf_ridx, CUR_TI->available);
3362
3363         audio_read_next_metadata();
3364     }
3365 }
3366
3367 static void audio_new_playlist(void)
3368 {
3369     /* Prepare to start a new fill from the beginning of the playlist */
3370     last_peek_offset = -1;
3371     if (audio_have_tracks()) {
3372         playlist_end = false;
3373         track_widx = track_ridx;
3374         audio_clear_track_entries(true);
3375
3376         track_widx++;
3377         track_widx &= MAX_TRACK_MASK;
3378
3379         /* Stop reading the current track */
3380         CUR_TI->filerem = 0;
3381         close(current_fd);
3382         current_fd = -1;
3383
3384         /* Mark the current track as invalid to prevent skipping back to it */
3385         CUR_TI->taginfo_ready = false;
3386
3387         /* Invalidate the buffer other than the playing track */
3388         buf_widx = RINGBUF_ADD(buf_ridx, CUR_TI->available);
3389     }
3390
3391     /* Signal the codec to initiate a track change forward */
3392     new_playlist = true;
3393     ci.new_track = 1;
3394
3395     /* Officially playing */
3396     queue_reply(&audio_queue, 1);
3397
3398     audio_fill_file_buffer(false, true, 0);
3399 }
3400
3401 static void audio_initiate_track_change(long direction)
3402 {
3403     playlist_end = false;
3404     ci.new_track += direction;
3405     wps_offset -= direction;
3406 }
3407
3408 static void audio_initiate_dir_change(long direction)
3409 {
3410     playlist_end = false;
3411     dir_skip = true;
3412     ci.new_track = direction;
3413 }
3414
3415 /*
3416  * Layout audio buffer as follows - iram buffer depends on target:
3417  * [|SWAP:iram][|TALK]|MALLOC|FILE|GUARD|PCM|[SWAP:dram[|iram]|]
3418  */
3419 static void audio_reset_buffer(void)
3420 {
3421     /* see audio_get_recording_buffer if this is modified */
3422     logf("audio_reset_buffer");
3423
3424     /* If the setup of anything allocated before the file buffer is
3425        changed, do check the adjustments after the buffer_alloc call
3426        as it will likely be affected and need sliding over */
3427
3428     /* Initially set up file buffer as all space available */
3429     malloc_buf = audiobuf + talk_get_bufsize();
3430     /* Align the malloc buf to line size. Especially important to cf
3431        targets that do line reads/writes. */
3432     malloc_buf = (unsigned char *)(((uintptr_t)malloc_buf + 15) & ~15);
3433     filebuf    = malloc_buf + MALLOC_BUFSIZE; /* filebuf line align implied */
3434     filebuflen = audiobufend - filebuf;
3435
3436     /* Allow for codec swap space at end of audio buffer */
3437     if (talk_voice_required())
3438     {
3439         /* Layout of swap buffer:
3440          * #ifdef IRAM_STEAL (dedicated iram_buf):
3441          *      |iram_buf|...audiobuf...|dram_buf|audiobufend
3442          * #else:
3443          *      audiobuf...|dram_buf|iram_buf|audiobufend
3444          */
3445 #ifdef PLAYBACK_VOICE
3446         /* Check for an absolutely nasty situation which should never,
3447            ever happen - frankly should just panic */
3448         if (voice_codec_loaded && current_codec != CODEC_IDX_VOICE)
3449         {
3450             logf("buffer reset with voice swapped");
3451         }
3452         /* line align length which line aligns the calculations below since
3453            all sizes are also at least line aligned - needed for memswap128 */
3454         filebuflen &= ~15;
3455 #ifdef IRAM_STEAL
3456         filebuflen -= CODEC_SIZE;
3457 #else
3458         filebuflen -= CODEC_SIZE + CODEC_IRAM_SIZE;
3459 #endif
3460         /* Allocate buffers for swapping voice <=> audio */
3461         /* If using IRAM for plugins voice IRAM swap buffer must be dedicated
3462            and out of the way of buffer usage or else a call to audio_get_buffer
3463            and subsequent buffer use might trash the swap space. A plugin
3464            initializing IRAM after getting the full buffer would present similar
3465            problem. Options include: failing the request if the other buffer
3466            has been obtained already or never allowing use of the voice IRAM
3467            buffer within the audio buffer. Using buffer_alloc basically
3468            implements the second in a more convenient way. */
3469         dram_buf = filebuf + filebuflen;
3470
3471 #ifdef IRAM_STEAL
3472         /* Allocate voice IRAM swap buffer once */
3473         if (iram_buf == NULL)
3474         {
3475             iram_buf = buffer_alloc(CODEC_IRAM_SIZE);
3476             /* buffer_alloc moves audiobuf; this is safe because only the end
3477              * has been touched so far in this function and the address of
3478              * filebuf + filebuflen is not changed */
3479             malloc_buf += CODEC_IRAM_SIZE;
3480             filebuf    += CODEC_IRAM_SIZE;
3481             filebuflen -= CODEC_IRAM_SIZE;
3482         }
3483 #else
3484         /* Allocate iram_buf after dram_buf */
3485         iram_buf = dram_buf + CODEC_SIZE;
3486 #endif /* IRAM_STEAL */
3487 #endif /* PLAYBACK_VOICE */
3488     }
3489     else
3490     {
3491 #ifdef PLAYBACK_VOICE
3492         /* No swap buffers needed */
3493         iram_buf = NULL;
3494         dram_buf = NULL;
3495 #endif
3496     }
3497
3498     /* Subtract whatever the pcm buffer says it used plus the guard buffer */
3499     filebuflen -= pcmbuf_init(filebuf + filebuflen) + GUARD_BUFSIZE;
3500
3501     /* Make sure filebuflen is a longword multiple after adjustment - filebuf
3502        will already be line aligned */
3503     filebuflen &= ~3;
3504
3505     /* Set the high watermark as 75% full...or 25% empty :) */
3506 #if MEM > 8
3507     high_watermark = 3*filebuflen / 4;
3508 #endif
3509
3510     /* Clear any references to the file buffer */
3511     buffer_state = BUFFER_STATE_INITIALIZED;
3512
3513 #ifdef ROCKBOX_HAS_LOGF
3514     /* Make sure everything adds up - yes, some info is a bit redundant but
3515        aids viewing and the sumation of certain variables should add up to
3516        the location of others. */
3517     {
3518         size_t pcmbufsize;
3519         unsigned char * pcmbuf = pcmbuf_get_meminfo(&pcmbufsize);
3520         logf("mabuf:  %08X", (unsigned)malloc_buf);
3521         logf("mabufe: %08X", (unsigned)(malloc_buf + MALLOC_BUFSIZE));
3522         logf("fbuf:   %08X", (unsigned)filebuf);
3523         logf("fbufe:  %08X", (unsigned)(filebuf + filebuflen));
3524         logf("gbuf:   %08X", (unsigned)(filebuf + filebuflen));
3525         logf("gbufe:  %08X", (unsigned)(filebuf + filebuflen + GUARD_BUFSIZE));
3526         logf("pcmb:   %08X", (unsigned)pcmbuf);
3527         logf("pcmbe:  %08X", (unsigned)(pcmbuf + pcmbufsize));
3528         if (dram_buf)
3529         {
3530             logf("dramb:  %08X", (unsigned)dram_buf);
3531             logf("drambe: %08X", (unsigned)(dram_buf + CODEC_SIZE));
3532         }
3533         if (iram_buf)
3534         {
3535             logf("iramb:  %08X", (unsigned)iram_buf);
3536             logf("irambe:  %08X", (unsigned)(iram_buf + CODEC_IRAM_SIZE));
3537         }
3538     }
3539 #endif
3540 }
3541
3542 #if MEM > 8
3543 /* we dont want this rebuffering on targets with little ram
3544    because the disk may never spin down */
3545 static bool ata_fillbuffer_callback(void)
3546 {
3547     queue_post(&audio_queue, Q_AUDIO_FILL_BUFFER_IF_ACTIVE_ATA, 0);
3548     return true;
3549 }
3550 #endif
3551
3552 static void audio_thread(void)
3553 {
3554     struct event ev;
3555
3556     pcm_postinit();
3557
3558 #ifdef PLAYBACK_VOICE
3559     /* Unlock mutex that init stage locks before creating this thread */
3560     mutex_unlock(&mutex_codecthread);
3561
3562     /* Buffers must be set up by now - should panic - really */
3563     if (buffer_state != BUFFER_STATE_INITIALIZED)
3564     {
3565         logf("audio_thread start: no buffer");
3566     }
3567
3568     /* Have to wait for voice to load up or else the codec swap will be
3569        invalid when an audio codec is loaded */
3570     wait_for_voice_swap_in();
3571 #endif
3572
3573     while (1)
3574     {
3575         intptr_t result = 0;
3576
3577         if (filling)
3578         {
3579             queue_wait_w_tmo(&audio_queue, &ev, 0);
3580             if (ev.id == SYS_TIMEOUT)
3581                 ev.id = Q_AUDIO_FILL_BUFFER;
3582         }
3583         else
3584         {
3585             queue_wait_w_tmo(&audio_queue, &ev, HZ/2);
3586 #if MEM > 8
3587             if (playing && (ev.id == SYS_TIMEOUT) &&
3588                 (FILEBUFUSED < high_watermark))
3589                 register_ata_idle_func(ata_fillbuffer_callback);
3590 #endif
3591         }
3592
3593         switch (ev.id) {
3594 #if MEM > 8
3595             case Q_AUDIO_FILL_BUFFER_IF_ACTIVE_ATA:
3596                  /* only fill if the disk is still spining */
3597 #ifndef SIMULATOR
3598                  if (!ata_disk_is_active())
3599                     break;
3600 #endif
3601 #endif /* MEM > 8 */
3602                   /* else fall through to Q_AUDIO_FILL_BUFFER */
3603             case Q_AUDIO_FILL_BUFFER:
3604                 LOGFQUEUE("audio < Q_AUDIO_FILL_BUFFER");
3605                 if (!filling)
3606                     if (!playing || playlist_end || ci.stop_codec)
3607                         break;
3608                 audio_fill_file_buffer(false, false, 0);
3609                 break;
3610
3611             case Q_AUDIO_PLAY:
3612                 LOGFQUEUE("audio < Q_AUDIO_PLAY");
3613                 if (playing && ev.data <= 0)
3614                     audio_new_playlist();
3615                 else
3616                 {
3617                     audio_stop_playback();
3618                     audio_play_start((size_t)ev.data);
3619                 }
3620                 break ;
3621
3622             case Q_AUDIO_STOP:
3623                 LOGFQUEUE("audio < Q_AUDIO_STOP");
3624                 if (playing)
3625                     audio_stop_playback();
3626                 if (ev.data != 0)
3627                     queue_clear(&audio_queue);
3628                 break ;
3629
3630             case Q_AUDIO_PAUSE:
3631                 LOGFQUEUE("audio < Q_AUDIO_PAUSE");
3632                 if (!playing)
3633                     break;
3634                 pcmbuf_pause((bool)ev.data);
3635                 paused = (bool)ev.data;
3636                 break ;
3637
3638             case Q_AUDIO_SKIP:
3639                 LOGFQUEUE("audio < Q_AUDIO_SKIP");
3640                 audio_initiate_track_change((long)ev.data);
3641                 break;
3642
3643             case Q_AUDIO_PRE_FF_REWIND:
3644                 LOGFQUEUE("audio < Q_AUDIO_PRE_FF_REWIND");
3645                 if (!playing)
3646                     break;
3647                 pcmbuf_pause(true);
3648                 break;
3649
3650             case Q_AUDIO_FF_REWIND:
3651                 LOGFQUEUE("audio < Q_AUDIO_FF_REWIND");
3652                 if (!playing)
3653                     break ;
3654                 ci.seek_time = (long)ev.data+1;
3655                 break ;
3656
3657             case Q_AUDIO_REBUFFER_SEEK:
3658                 LOGFQUEUE("audio < Q_AUDIO_REBUFFER_SEEK");
3659                 result = audio_rebuffer_and_seek(ev.data);
3660                 break;
3661
3662             case Q_AUDIO_CHECK_NEW_TRACK:
3663                 LOGFQUEUE("audio < Q_AUDIO_CHECK_NEW_TRACK");
3664                 result = audio_check_new_track();
3665                 break;
3666
3667             case Q_AUDIO_DIR_SKIP:
3668                 LOGFQUEUE("audio < Q_AUDIO_DIR_SKIP");
3669                 playlist_end = false;
3670                 audio_initiate_dir_change(ev.data);
3671                 break;
3672
3673             case Q_AUDIO_FLUSH:
3674                 LOGFQUEUE("audio < Q_AUDIO_FLUSH");
3675                 audio_invalidate_tracks();
3676                 break ;
3677
3678             case Q_AUDIO_TRACK_CHANGED:
3679                 LOGFQUEUE("audio < Q_AUDIO_TRACK_CHANGED");
3680                 if (track_changed_callback)
3681                     track_changed_callback(&CUR_TI->id3);
3682                 track_changed = true;
3683                 playlist_update_resume_info(audio_current_track());
3684                 break ;
3685
3686 #ifndef SIMULATOR
3687             case SYS_USB_CONNECTED:
3688                 LOGFQUEUE("audio < SYS_USB_CONNECTED");
3689                 if (playing)
3690                     audio_stop_playback();
3691                 usb_acknowledge(SYS_USB_CONNECTED_ACK);
3692                 usb_wait_for_disconnect(&audio_queue);
3693                 break ;
3694 #endif
3695
3696             case SYS_TIMEOUT:
3697                 LOGFQUEUE_SYS_TIMEOUT("audio < SYS_TIMEOUT");
3698                 break;
3699
3700             default:
3701                 LOGFQUEUE("audio < default");
3702         } /* end switch */
3703
3704         queue_reply(&audio_queue, result);
3705     } /* end while */
3706 }
3707
3708 #ifdef ROCKBOX_HAS_LOGF
3709 static void audio_test_track_changed_event(struct mp3entry *id3)
3710 {
3711     (void)id3;
3712
3713     logf("tce:%s", id3->path);
3714 }
3715 #endif
3716
3717 /* Initialize the audio system - called from init() in main.c.
3718  * Last function because of all the references to internal symbols
3719  */
3720 void audio_init(void)
3721 {
3722 #ifdef PLAYBACK_VOICE
3723     static bool voicetagtrue = true;
3724     static struct mp3entry id3_voice;
3725 #endif
3726
3727     /* Can never do this twice */
3728     if (audio_is_initialized)
3729     {
3730         logf("audio: already initialized");
3731         return;
3732     }
3733
3734     logf("audio: initializing");
3735
3736     /* Initialize queues before giving control elsewhere in case it likes
3737        to send messages. Thread creation will be delayed however so nothing
3738        starts running until ready if something yields such as talk_init. */
3739 #ifdef PLAYBACK_VOICE
3740     mutex_init(&mutex_codecthread);
3741     /* Take ownership of lock to prevent playback of anything before audio
3742        hardware is initialized - audio thread unlocks it after final init
3743        stage */
3744     mutex_lock(&mutex_codecthread);
3745 #endif
3746     queue_init(&audio_queue, true);
3747     queue_enable_queue_send(&audio_queue, &audio_queue_sender_list);
3748     queue_init(&codec_queue, true);
3749
3750     pcm_init();
3751
3752 #ifdef ROCKBOX_HAS_LOGF
3753     audio_set_track_changed_event(audio_test_track_changed_event);
3754 #endif
3755
3756      /* Initialize codec api. */
3757     ci.read_filebuf        = codec_filebuf_callback;
3758     ci.pcmbuf_insert       = codec_pcmbuf_insert_callback;
3759     ci.get_codec_memory    = codec_get_memory_callback;
3760     ci.request_buffer      = codec_request_buffer_callback;
3761     ci.advance_buffer      = codec_advance_buffer_callback;
3762     ci.advance_buffer_loc  = codec_advance_buffer_loc_callback;
3763     ci.request_next_track  = codec_request_next_track_callback;
3764     ci.mp3_get_filepos     = codec_mp3_get_filepos_callback;
3765     ci.seek_buffer         = codec_seek_buffer_callback;
3766     ci.seek_complete       = codec_seek_complete_callback;
3767     ci.set_elapsed         = codec_set_elapsed_callback;
3768     ci.set_offset          = codec_set_offset_callback;
3769     ci.configure           = codec_configure_callback;
3770     ci.discard_codec       = codec_discard_codec_callback;
3771
3772      /* Initialize voice codec api. */
3773 #ifdef PLAYBACK_VOICE
3774     memcpy(&ci_voice, &ci, sizeof(ci_voice));
3775     memset(&id3_voice, 0, sizeof(id3_voice));
3776     ci_voice.read_filebuf        = voice_filebuf_callback;
3777     ci_voice.pcmbuf_insert       = voice_pcmbuf_insert_callback;
3778     ci_voice.get_codec_memory    = voice_get_memory_callback;
3779     ci_voice.request_buffer      = voice_request_buffer_callback;
3780     ci_voice.advance_buffer      = voice_advance_buffer_callback;
3781     ci_voice.advance_buffer_loc  = voice_advance_buffer_loc_callback;
3782     ci_voice.request_next_track  = voice_request_next_track_callback;
3783     ci_voice.mp3_get_filepos     = voice_mp3_get_filepos_callback;
3784     ci_voice.seek_buffer         = voice_seek_buffer_callback;
3785     ci_voice.seek_complete       = voice_do_nothing;
3786     ci_voice.set_elapsed         = voice_set_elapsed_callback;
3787     ci_voice.set_offset          = voice_set_offset_callback;
3788     ci_voice.configure           = voice_configure_callback;
3789     ci_voice.discard_codec       = voice_do_nothing;
3790     ci_voice.taginfo_ready       = &voicetagtrue;
3791     ci_voice.id3                 = &id3_voice;
3792     id3_voice.frequency          = 11200;
3793     id3_voice.length             = 1000000L;
3794 #endif
3795
3796     /* initialize the buffer */
3797     filebuf = audiobuf;
3798
3799     /* audio_reset_buffer must to know the size of voice buffer so init
3800        talk first */
3801     talk_init();
3802
3803     /* Create the threads late now that we shouldn't be yielding again before
3804        returning */
3805     codec_thread_p = create_thread(
3806             codec_thread, codec_stack, sizeof(codec_stack),
3807             codec_thread_name IF_PRIO(, PRIORITY_PLAYBACK)
3808         IF_COP(, CPU, true));
3809
3810     create_thread(audio_thread, audio_stack, sizeof(audio_stack),
3811                   audio_thread_name IF_PRIO(, PRIORITY_BUFFERING)
3812           IF_COP(, CPU, false));
3813
3814 #ifdef PLAYBACK_VOICE
3815     /* TODO: Change this around when various speech codecs can be used */
3816     if (talk_voice_required())
3817     {
3818         logf("Starting voice codec");
3819         queue_init(&voice_queue, true);
3820         create_thread(voice_thread, voice_stack,
3821                 sizeof(voice_stack), voice_thread_name
3822                 IF_PRIO(, PRIORITY_PLAYBACK) IF_COP(, CPU, false));
3823     }
3824 #endif
3825
3826     /* Set crossfade setting for next buffer init which should be about... */
3827     pcmbuf_crossfade_enable(global_settings.crossfade);
3828
3829     /* ...now! Set up the buffers */
3830     audio_reset_buffer();
3831
3832     /* Probably safe to say */
3833     audio_is_initialized = true;
3834
3835     sound_settings_apply();
3836 #ifdef HAVE_WM8758
3837     eq_hw_enable(global_settings.eq_hw_enabled);
3838 #endif
3839     audio_set_buffer_margin(global_settings.buffer_margin);
3840 } /* audio_init */