?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Checkwps: give wps_screen an initial value
[kugel-rb.git] / apps / mpeg.c
blobe28260b6a727fcdcc4a2d7311d5afd8217c1b237
1 /***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2002 by Linus Nielsen Feltzing
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
19 *
20 ****************************************************************************/
21 #include <stdbool.h>
22 #include <stdlib.h>
23 #include "config.h"
24
25 #if CONFIG_CODEC != SWCODEC
26
27 #include "debug.h"
28 #include "panic.h"
29 #include "metadata.h"
30 #include "mpeg.h"
31 #include "audio.h"
32 #include "storage.h"
33 #include "string.h"
34 #include <kernel.h>
35 #include "thread.h"
36 #include "errno.h"
37 #include "mp3data.h"
38 #include "buffer.h"
39 #include "mp3_playback.h"
40 #include "sound.h"
41 #include "bitswap.h"
42 #include "appevents.h"
43 #include "cuesheet.h"
44 #include "settings.h"
45 #ifndef SIMULATOR
46 #include "i2c.h"
47 #include "mas.h"
48 #include "system.h"
49 #include "usb.h"
50 #include "file.h"
51 #include "hwcompat.h"
52 #endif /* !SIMULATOR */
53 #ifdef HAVE_LCD_BITMAP
54 #include "lcd.h"
55 #endif
56
57 #ifndef SIMULATOR
58 extern unsigned long mas_version_code;
59 #endif
60
61 #if CONFIG_CODEC == MAS3587F
62 extern enum /* from mp3_playback.c */
63 {
64 MPEG_DECODER,
65 MPEG_ENCODER
66 } mpeg_mode;
67 #endif /* CONFIG_CODEC == MAS3587F */
68
69 extern char* playlist_peek(int steps);
70 extern bool playlist_check(int steps);
71 extern int playlist_next(int steps);
72 extern int playlist_amount(void);
73 extern int playlist_update_resume_info(const struct mp3entry* id3);
74
75 #define MPEG_PLAY 1
76 #define MPEG_STOP 2
77 #define MPEG_PAUSE 3
78 #define MPEG_RESUME 4
79 #define MPEG_NEXT 5
80 #define MPEG_PREV 6
81 #define MPEG_FF_REWIND 7
82 #define MPEG_FLUSH_RELOAD 8
83 #define MPEG_RECORD 9
84 #define MPEG_INIT_RECORDING 10
85 #define MPEG_INIT_PLAYBACK 11
86 #define MPEG_NEW_FILE 12
87 #define MPEG_PAUSE_RECORDING 13
88 #define MPEG_RESUME_RECORDING 14
89 #define MPEG_NEED_DATA 100
90 #define MPEG_TRACK_CHANGE 101
91 #define MPEG_SAVE_DATA 102
92 #define MPEG_STOP_DONE 103
93 #define MPEG_PRERECORDING_TICK 104
94
95 /* indicator for MPEG_NEED_DATA */
96 #define GENERATE_UNBUFFER_EVENTS 1
97
98 /* list of tracks in memory */
99 #define MAX_TRACK_ENTRIES (1<<4) /* Must be power of 2 */
100 #define MAX_TRACK_ENTRIES_MASK (MAX_TRACK_ENTRIES - 1)
101
102 struct trackdata
103 {
104 struct mp3entry id3;
105 int mempos;
106 int load_ahead_index;
107 };
108
109 static struct trackdata trackdata[MAX_TRACK_ENTRIES];
110
111 static unsigned int current_track_counter = 0;
112
113 /* Play time of the previous track */
114 unsigned long prev_track_elapsed;
115
116 #ifndef SIMULATOR
117 static int track_read_idx = 0;
118 static int track_write_idx = 0;
119 #endif /* !SIMULATOR */
120
121 /* Cuesheet support */
122 static struct cuesheet *curr_cuesheet = NULL;
123 static bool checked_for_cuesheet = false;
124
125 static const char mpeg_thread_name[] = "mpeg";
126 static unsigned int mpeg_errno;
127
128 static bool playing = false; /* We are playing an MP3 stream */
129 static bool is_playing = false; /* We are (attempting to) playing MP3 files */
130 static bool paused; /* playback is paused */
131
132 #ifdef SIMULATOR
133 static char mpeg_stack[DEFAULT_STACK_SIZE];
134 static struct mp3entry taginfo;
135
136 #else /* !SIMULATOR */
137 static struct event_queue mpeg_queue;
138 static long mpeg_stack[(DEFAULT_STACK_SIZE + 0x1000)/sizeof(long)];
139
140 static int audiobuflen;
141 static int audiobuf_write;
142 static int audiobuf_swapwrite;
143 static int audiobuf_read;
144
145 static int mpeg_file;
146
147 static bool play_pending; /* We are about to start playing */
148 static bool play_pending_track_change; /* When starting play we're starting a new file */
149 static bool filling; /* We are filling the buffer with data from disk */
150 static bool dma_underrun; /* True when the DMA has stopped because of
151 slow disk reading (read error, shaking) */
152 static bool mpeg_stop_done;
153
154 static int last_dma_tick = 0;
155 static int last_dma_chunk_size;
156
157 static long low_watermark; /* Dynamic low watermark level */
158 static long low_watermark_margin = 0; /* Extra time in seconds for watermark */
159 static long lowest_watermark_level; /* Debug value to observe the buffer
160 usage */
161 #if CONFIG_CODEC == MAS3587F
162 static char recording_filename[MAX_PATH]; /* argument to thread */
163 static char delayed_filename[MAX_PATH]; /* internal copy of above */
164
165 static char xing_buffer[MAX_XING_HEADER_SIZE];
166
167 static bool init_recording_done;
168 static bool init_playback_done;
169 static bool prerecording; /* True if prerecording is enabled */
170 static bool is_prerecording; /* True if we are prerecording */
171 static bool is_recording; /* We are recording */
172
173 static enum {
174 NOT_SAVING = 0, /* reasons to save data, sorted by importance */
175 BUFFER_FULL,
176 NEW_FILE,
177 STOP_RECORDING
178 } saving_status;
179
180 static int rec_frequency_index; /* For create_xing_header() calls */
181 static int rec_version_index; /* For create_xing_header() calls */
182
183 struct prerecord_info {
184 int mempos;
185 unsigned long framecount;
186 };
187
188 static struct prerecord_info prerecord_buffer[MPEG_MAX_PRERECORD_SECONDS];
189 static int prerecord_index; /* Current index in the prerecord buffer */
190 static int prerecording_max_seconds; /* Max number of seconds to store */
191 static int prerecord_count; /* Number of seconds in the prerecord buffer */
192 static int prerecord_timeout; /* The tick count of the next prerecord data
193 store */
194
195 unsigned long record_start_time; /* Value of current_tick when recording
196 was started */
197 unsigned long pause_start_time; /* Value of current_tick when pause was
198 started */
199 static unsigned long last_rec_time;
200 static unsigned long num_rec_bytes;
201 static unsigned long last_rec_bytes;
202 static unsigned long frame_count_start;
203 static unsigned long frame_count_end;
204 static unsigned long saved_header = 0;
205
206 /* Shadow MAS registers */
207 unsigned long shadow_encoder_control = 0;
208 #endif /* CONFIG_CODEC == MAS3587F */
209
210 #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
211 unsigned long shadow_io_control_main = 0;
212 unsigned long shadow_soft_mute = 0;
213 unsigned shadow_codec_reg0;
214 #endif /* (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */
215
216 #ifdef HAVE_RECORDING
217 static const unsigned char empty_id3_header[] =
218 {
219 'I', 'D', '3', 0x03, 0x00, 0x00,
220 0x00, 0x00, 0x1f, 0x76 /* Size is 4096 minus 10 bytes for the header */
221 };
222 #endif /* HAVE_RECORDING */
223
224
225 static int get_unplayed_space(void);
226 static int get_playable_space(void);
227 static int get_unswapped_space(void);
228 #endif /* !SIMULATOR */
229
230 #if (CONFIG_CODEC == MAS3587F) && !defined(SIMULATOR)
231 static void init_recording(void);
232 static void prepend_header(void);
233 static void update_header(void);
234 static void start_prerecording(void);
235 static void start_recording(void);
236 static void stop_recording(void);
237 static int get_unsaved_space(void);
238 static void pause_recording(void);
239 static void resume_recording(void);
240 #endif /* (CONFIG_CODEC == MAS3587F) && !defined(SIMULATOR) */
241
242
243 #ifndef SIMULATOR
244 static int num_tracks_in_memory(void)
245 {
246 return (track_write_idx - track_read_idx) & MAX_TRACK_ENTRIES_MASK;
247 }
248
249 #ifdef DEBUG_TAGS
250 static void debug_tags(void)
251 {
252 int i;
253
254 for(i = 0;i < MAX_TRACK_ENTRIES;i++)
255 {
256 DEBUGF("%d - %s\n", i, trackdata[i].id3.path);
257 }
258 DEBUGF("read: %d, write :%d\n", track_read_idx, track_write_idx);
259 DEBUGF("num_tracks_in_memory: %d\n", num_tracks_in_memory());
260 }
261 #else /* !DEBUG_TAGS */
262 #define debug_tags()
263 #endif /* !DEBUG_TAGS */
264
265 static void remove_current_tag(void)
266 {
267 if(num_tracks_in_memory() > 0)
268 {
269 /* First move the index, so nobody tries to access the tag */
270 track_read_idx = (track_read_idx+1) & MAX_TRACK_ENTRIES_MASK;
271 checked_for_cuesheet = false;
272 debug_tags();
273 }
274 else
275 {
276 DEBUGF("remove_current_tag: no tracks to remove\n");
277 }
278 }
279
280 static void remove_all_non_current_tags(void)
281 {
282 track_write_idx = (track_read_idx+1) & MAX_TRACK_ENTRIES_MASK;
283 debug_tags();
284 }
285
286 static void remove_all_tags(void)
287 {
288 track_write_idx = track_read_idx;
289
290 debug_tags();
291 }
292
293 static struct trackdata *get_trackdata(int offset)
294 {
295 if(offset >= num_tracks_in_memory())
296 return NULL;
297 else
298 return &trackdata[(track_read_idx + offset) & MAX_TRACK_ENTRIES_MASK];
299 }
300 #endif /* !SIMULATOR */
301
302 /***********************************************************************/
303 /* audio event handling */
304
305 #define MAX_EVENT_HANDLERS 10
306 struct event_handlers_table
307 {
308 AUDIO_EVENT_HANDLER handler;
309 unsigned short mask;
310 };
311 static struct event_handlers_table event_handlers[MAX_EVENT_HANDLERS];
312 static int event_handlers_count = 0;
313
314 void audio_register_event_handler(AUDIO_EVENT_HANDLER handler, unsigned short mask)
315 {
316 if (event_handlers_count < MAX_EVENT_HANDLERS)
317 {
318 event_handlers[event_handlers_count].handler = handler;
319 event_handlers[event_handlers_count].mask = mask;
320 event_handlers_count++;
321 }
322 }
323
324 /* dispatch calls each handler in the order registered and returns after some
325 handler actually handles the event (the event is assumed to no longer be valid
326 after this, due to the handler changing some condition); returns true if someone
327 handled the event, which is expected to cause the caller to skip its own handling
328 of the event */
329 #ifndef SIMULATOR
330 static bool audio_dispatch_event(unsigned short event, unsigned long data)
331 {
332 int i = 0;
333 for(i=0; i < event_handlers_count; i++)
334 {
335 if ( event_handlers[i].mask & event )
336 {
337 int rc = event_handlers[i].handler(event, data);
338 if ( rc == AUDIO_EVENT_RC_HANDLED )
339 return true;
340 }
341 }
342 return false;
343 }
344 #endif
345
346 /***********************************************************************/
347
348 static void set_elapsed(struct mp3entry* id3)
349 {
350 if ( id3->vbr ) {
351 if ( id3->has_toc ) {
352 /* calculate elapsed time using TOC */
353 int i;
354 unsigned int remainder, plen, relpos, nextpos;
355
356 /* find wich percent we're at */
357 for (i=0; i<100; i++ )
358 {
359 if ( id3->offset < id3->toc[i] * (id3->filesize / 256) )
360 {
361 break;
362 }
363 }
364
365 i--;
366 if (i < 0)
367 i = 0;
368
369 relpos = id3->toc[i];
370
371 if (i < 99)
372 {
373 nextpos = id3->toc[i+1];
374 }
375 else
376 {
377 nextpos = 256;
378 }
379
380 remainder = id3->offset - (relpos * (id3->filesize / 256));
381
382 /* set time for this percent (divide before multiply to prevent
383 overflow on long files. loss of precision is negligible on
384 short files) */
385 id3->elapsed = i * (id3->length / 100);
386
387 /* calculate remainder time */
388 plen = (nextpos - relpos) * (id3->filesize / 256);
389 id3->elapsed += (((remainder * 100) / plen) *
390 (id3->length / 10000));
391 }
392 else {
393 /* no TOC exists. set a rough estimate using average bitrate */
394 int tpk = id3->length / (id3->filesize / 1024);
395 id3->elapsed = id3->offset / 1024 * tpk;
396 }
397 }
398 else
399 /* constant bitrate, use exact calculation */
400 id3->elapsed = id3->offset / (id3->bitrate / 8);
401 }
402
403 int audio_get_file_pos(void)
404 {
405 int pos = -1;
406 struct mp3entry *id3 = audio_current_track();
407
408 if (id3->vbr)
409 {
410 if (id3->has_toc)
411 {
412 /* Use the TOC to find the new position */
413 unsigned int percent, remainder;
414 int curtoc, nexttoc, plen;
415
416 percent = (id3->elapsed*100)/id3->length;
417 if (percent > 99)
418 percent = 99;
419
420 curtoc = id3->toc[percent];
421
422 if (percent < 99)
423 nexttoc = id3->toc[percent+1];
424 else
425 nexttoc = 256;
426
427 pos = (id3->filesize/256)*curtoc;
428
429 /* Use the remainder to get a more accurate position */
430 remainder = (id3->elapsed*100)%id3->length;
431 remainder = (remainder*100)/id3->length;
432 plen = (nexttoc - curtoc)*(id3->filesize/256);
433 pos += (plen/100)*remainder;
434 }
435 else
436 {
437 /* No TOC exists, estimate the new position */
438 pos = (id3->filesize / (id3->length / 1000)) *
439 (id3->elapsed / 1000);
440 }
441 }
442 else if (id3->bitrate)
443 pos = id3->elapsed * (id3->bitrate / 8);
444 else
445 {
446 return -1;
447 }
448
449 if (pos >= (int)(id3->filesize - id3->id3v1len))
450 {
451 /* Don't seek right to the end of the file so that we can
452 transition properly to the next song */
453 pos = id3->filesize - id3->id3v1len - 1;
454 }
455 else if (pos < (int)id3->first_frame_offset)
456 {
457 /* skip past id3v2 tag and other leading garbage */
458 pos = id3->first_frame_offset;
459 }
460 return pos;
461 }
462
463 unsigned long mpeg_get_last_header(void)
464 {
465 #ifdef SIMULATOR
466 return 0;
467 #else /* !SIMULATOR */
468 unsigned long tmp[2];
469
470 /* Read the frame data from the MAS and reconstruct it with the
471 frame sync and all */
472 mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_STATUS_1, tmp, 2);
473 return 0xffe00000 | ((tmp[0] & 0x7c00) << 6) | (tmp[1] & 0xffff);
474 #endif /* !SIMULATOR */
475 }
476
477 #ifndef SIMULATOR
478 /* Send callback events to notify about removing old tracks. */
479 static void generate_unbuffer_events(void)
480 {
481 int i;
482 int numentries = MAX_TRACK_ENTRIES - num_tracks_in_memory();
483 int cur_idx = track_write_idx;
484
485 for (i = 0; i < numentries; i++)
486 {
487 /* Send an event to notify that track has finished. */
488 send_event(PLAYBACK_EVENT_TRACK_FINISH, &trackdata[cur_idx].id3);
489 cur_idx = (cur_idx + 1) & MAX_TRACK_ENTRIES_MASK;
490 }
491 }
492
493 /* Send callback events to notify about new tracks. */
494 static void generate_postbuffer_events(void)
495 {
496 int i;
497 int numentries = num_tracks_in_memory();
498 int cur_idx = track_read_idx;
499
500 for (i = 0; i < numentries; i++)
501 {
502 send_event(PLAYBACK_EVENT_TRACK_BUFFER, &trackdata[cur_idx].id3);
503 cur_idx = (cur_idx + 1) & MAX_TRACK_ENTRIES_MASK;
504 }
505 }
506
507 static void recalculate_watermark(int bitrate)
508 {
509 int bytes_per_sec;
510 int time = storage_spinup_time();
511
512 /* A bitrate of 0 probably means empty VBR header. We play safe
513 and set a high threshold */
514 if(bitrate == 0)
515 bitrate = 320;
516
517 bytes_per_sec = bitrate * 1000 / 8;
518
519 if(time)
520 {
521 /* No drive spins up faster than 3.5s */
522 if(time < 350)
523 time = 350;
524
525 time = time * 3;
526 low_watermark = ((low_watermark_margin * HZ + time) *
527 bytes_per_sec) / HZ;
528 }
529 else
530 {
531 low_watermark = MPEG_LOW_WATER;
532 }
533 }
534
535 #ifdef HAVE_DISK_STORAGE
536 void audio_set_buffer_margin(int seconds)
537 {
538 low_watermark_margin = seconds;
539 }
540 #endif
541
542 void audio_get_debugdata(struct audio_debug *dbgdata)
543 {
544 dbgdata->audiobuflen = audiobuflen;
545 dbgdata->audiobuf_write = audiobuf_write;
546 dbgdata->audiobuf_swapwrite = audiobuf_swapwrite;
547 dbgdata->audiobuf_read = audiobuf_read;
548
549 dbgdata->last_dma_chunk_size = last_dma_chunk_size;
550
551 #if CONFIG_CPU == SH7034
552 dbgdata->dma_on = (SCR0 & 0x80) != 0;
553 #endif
554 dbgdata->playing = playing;
555 dbgdata->play_pending = play_pending;
556 dbgdata->is_playing = is_playing;
557 dbgdata->filling = filling;
558 dbgdata->dma_underrun = dma_underrun;
559
560 dbgdata->unplayed_space = get_unplayed_space();
561 dbgdata->playable_space = get_playable_space();
562 dbgdata->unswapped_space = get_unswapped_space();
563
564 dbgdata->low_watermark_level = low_watermark;
565 dbgdata->lowest_watermark_level = lowest_watermark_level;
566 }
567
568 #ifdef DEBUG
569 static void dbg_timer_start(void)
570 {
571 /* We are using timer 2 */
572
573 TSTR &= ~0x04; /* Stop the timer */
574 TSNC &= ~0x04; /* No synchronization */
575 TMDR &= ~0x44; /* Operate normally */
576
577 TCNT2 = 0; /* Start counting at 0 */
578 TCR2 = 0x03; /* Sysclock/8 */
579
580 TSTR |= 0x04; /* Start timer 2 */
581 }
582
583 static int dbg_cnt2us(unsigned int cnt)
584 {
585 return (cnt * 10000) / (FREQ/800);
586 }
587 #endif /* DEBUG */
588
589 static int get_unplayed_space(void)
590 {
591 int space = audiobuf_write - audiobuf_read;
592 if (space < 0)
593 space += audiobuflen;
594 return space;
595 }
596
597 static int get_playable_space(void)
598 {
599 int space = audiobuf_swapwrite - audiobuf_read;
600 if (space < 0)
601 space += audiobuflen;
602 return space;
603 }
604
605 static int get_unplayed_space_current_song(void)
606 {
607 int space;
608
609 if (num_tracks_in_memory() > 1)
610 {
611 space = get_trackdata(1)->mempos - audiobuf_read;
612 }
613 else
614 {
615 space = audiobuf_write - audiobuf_read;
616 }
617
618 if (space < 0)
619 space += audiobuflen;
620
621 return space;
622 }
623
624 static int get_unswapped_space(void)
625 {
626 int space = audiobuf_write - audiobuf_swapwrite;
627 if (space < 0)
628 space += audiobuflen;
629 return space;
630 }
631
632 #if CONFIG_CODEC == MAS3587F
633 static int get_unsaved_space(void)
634 {
635 int space = audiobuf_write - audiobuf_read;
636 if (space < 0)
637 space += audiobuflen;
638 return space;
639 }
640
641 static void drain_dma_buffer(void)
642 {
643 while (PBDRH & 0x40)
644 {
645 xor_b(0x08, &PADRH);
646
647 while (PBDRH & 0x80);
648
649 xor_b(0x08, &PADRH);
650
651 while (!(PBDRH & 0x80));
652 }
653 }
654
655 #ifdef DEBUG
656 static long timing_info_index = 0;
657 static long timing_info[1024];
658 #endif /* DEBUG */
659
660 void rec_tick (void) __attribute__ ((section (".icode")));
661 void rec_tick(void)
662 {
663 int i;
664 int delay;
665 char data;
666
667 if(is_recording && (PBDRH & 0x40))
668 {
669 #ifdef DEBUG
670 timing_info[timing_info_index++] = current_tick;
671 TCNT2 = 0;
672 #endif /* DEBUG */
673 /* Note: Although this loop is run in interrupt context, further
674 * optimisation will do no good. The MAS would then deliver bad
675 * frames occasionally, as observed in extended experiments. */
676 i = 0;
677 while (PBDRH & 0x40) /* We try to read as long as EOD is high */
678 {
679 xor_b(0x08, &PADRH); /* Set PR active, independent of polarity */
680
681 delay = 100;
682 while (PBDRH & 0x80) /* Wait until /RTW becomes active */
683 {
684 if (--delay <= 0) /* Bail out if we have to wait too long */
685 { /* i.e. the MAS doesn't want to talk to us */
686 xor_b(0x08, &PADRH); /* Set PR inactive */
687 goto transfer_end; /* and get out of here */
688 }
689 }
690
691 data = *(unsigned char *)0x04000000; /* read data byte */
692
693 xor_b(0x08, &PADRH); /* Set PR inactive */
694
695 audiobuf[audiobuf_write++] = data;
696
697 if (audiobuf_write >= audiobuflen)
698 audiobuf_write = 0;
699
700 i++;
701 }
702 transfer_end:
703
704 #ifdef DEBUG
705 timing_info[timing_info_index++] = TCNT2 + (i << 16);
706 timing_info_index &= 0x3ff;
707 #endif /* DEBUG */
708
709 num_rec_bytes += i;
710
711 if(is_prerecording)
712 {
713 if(TIME_AFTER(current_tick, prerecord_timeout))
714 {
715 prerecord_timeout = current_tick + HZ;
716 queue_post(&mpeg_queue, MPEG_PRERECORDING_TICK, 0);
717 }
718 }
719 else
720 {
721 /* Signal to save the data if we are running out of buffer
722 space */
723 if (audiobuflen - get_unsaved_space() < MPEG_RECORDING_LOW_WATER
724 && saving_status == NOT_SAVING)
725 {
726 saving_status = BUFFER_FULL;
727 queue_post(&mpeg_queue, MPEG_SAVE_DATA, 0);
728 }
729 }
730 }
731 }
732 #endif /* CONFIG_CODEC == MAS3587F */
733
734 void playback_tick(void)
735 {
736 struct trackdata *ptd = get_trackdata(0);
737 if(ptd)
738 {
739 ptd->id3.elapsed += (current_tick - last_dma_tick) * 1000 / HZ;
740 last_dma_tick = current_tick;
741 audio_dispatch_event(AUDIO_EVENT_POS_REPORT,
742 (unsigned long)ptd->id3.elapsed);
743 }
744 }
745
746 static void reset_mp3_buffer(void)
747 {
748 audiobuf_read = 0;
749 audiobuf_write = 0;
750 audiobuf_swapwrite = 0;
751 lowest_watermark_level = audiobuflen;
752 }
753
754 /* DMA transfer end interrupt callback */
755 static void transfer_end(unsigned char** ppbuf, size_t* psize)
756 {
757 if(playing && !paused)
758 {
759 int unplayed_space_left;
760 int space_until_end_of_buffer;
761 int track_offset = 1;
762 struct trackdata *track;
763
764 audiobuf_read += last_dma_chunk_size;
765 if(audiobuf_read >= audiobuflen)
766 audiobuf_read = 0;
767
768 /* First, check if we are on a track boundary */
769 if (num_tracks_in_memory() > 1)
770 {
771 if (audiobuf_read == get_trackdata(track_offset)->mempos)
772 {
773 if ( ! audio_dispatch_event(AUDIO_EVENT_END_OF_TRACK, 0) )
774 {
775 queue_post(&mpeg_queue, MPEG_TRACK_CHANGE, 0);
776 track_offset++;
777 }
778 }
779 }
780
781 unplayed_space_left = get_unplayed_space();
782
783 space_until_end_of_buffer = audiobuflen - audiobuf_read;
784
785 if(!filling && unplayed_space_left < low_watermark)
786 {
787 filling = true;
788 queue_post(&mpeg_queue, MPEG_NEED_DATA, GENERATE_UNBUFFER_EVENTS);
789 }
790
791 if(unplayed_space_left)
792 {
793 last_dma_chunk_size = MIN(0x2000, unplayed_space_left);
794 last_dma_chunk_size = MIN(last_dma_chunk_size,
795 space_until_end_of_buffer);
796
797 /* several tracks loaded? */
798 track = get_trackdata(track_offset);
799 if(track)
800 {
801 /* will we move across the track boundary? */
802 if (( audiobuf_read < track->mempos ) &&
803 ((audiobuf_read+last_dma_chunk_size) >
804 track->mempos ))
805 {
806 /* Make sure that we end exactly on the boundary */
807 last_dma_chunk_size = track->mempos - audiobuf_read;
808 }
809 }
810
811 *psize = last_dma_chunk_size & 0xffff;
812 *ppbuf = audiobuf + audiobuf_read;
813 track = get_trackdata(0);
814 if(track)
815 track->id3.offset += last_dma_chunk_size;
816
817 /* Update the watermark debug level */
818 if(unplayed_space_left < lowest_watermark_level)
819 lowest_watermark_level = unplayed_space_left;
820 }
821 else
822 {
823 /* Check if the end of data is because of a hard disk error.
824 If there is an open file handle, we are still playing music.
825 If not, the last file has been loaded, and the file handle is
826 closed. */
827 if(mpeg_file >= 0)
828 {
829 /* Update the watermark debug level */
830 if(unplayed_space_left < lowest_watermark_level)
831 lowest_watermark_level = unplayed_space_left;
832
833 DEBUGF("DMA underrun.\n");
834 dma_underrun = true;
835 }
836 else
837 {
838 if ( ! audio_dispatch_event(AUDIO_EVENT_END_OF_TRACK, 0) )
839 {
840 DEBUGF("No more MP3 data. Stopping.\n");
841 queue_post(&mpeg_queue, MPEG_TRACK_CHANGE, 0);
842 playing = false;
843 }
844 }
845 *psize = 0; /* no more transfer */
846 }
847 }
848 }
849
850 static struct trackdata *add_track_to_tag_list(const char *filename)
851 {
852 struct trackdata *track;
853 bool send_nid3_event;
854
855 if(num_tracks_in_memory() >= MAX_TRACK_ENTRIES)
856 {
857 DEBUGF("Tag memory is full\n");
858 return NULL;
859 }
860
861 track = &trackdata[track_write_idx];
862
863 /* grab id3 tag of new file and
864 remember where in memory it starts */
865 if(mp3info(&track->id3, filename))
866 {
867 DEBUGF("Bad mp3\n");
868 return NULL;
869 }
870 track->mempos = audiobuf_write;
871 track->id3.elapsed = 0;
872 #ifdef HAVE_LCD_BITMAP
873 if (track->id3.title)
874 lcd_getstringsize(track->id3.title, NULL, NULL);
875 if (track->id3.artist)
876 lcd_getstringsize(track->id3.artist, NULL, NULL);
877 if (track->id3.album)
878 lcd_getstringsize(track->id3.album, NULL, NULL);
879 #endif
880
881 /* if this track is the next track then let the UI know it can get it */
882 send_nid3_event = (track_write_idx == track_read_idx + 1);
883 track_write_idx = (track_write_idx+1) & MAX_TRACK_ENTRIES_MASK;
884 if (send_nid3_event)
885 send_event(PLAYBACK_EVENT_NEXTTRACKID3_AVAILABLE, NULL);
886 debug_tags();
887 return track;
888 }
889
890 static int new_file(int steps)
891 {
892 int max_steps = playlist_amount();
893 int start = 0;
894 int i;
895 struct trackdata *track;
896
897 /* Find out how many steps to advance. The load_ahead_index field tells
898 us how many playlist entries it had to skip to get to a valid one.
899 We add those together to find out where to start. */
900 if(steps > 0 && num_tracks_in_memory() > 1)
901 {
902 /* Begin with the song after the currently playing one */
903 i = 1;
904 while((track = get_trackdata(i++)))
905 {
906 start += track->load_ahead_index;
907 }
908 }
909
910 do {
911 char *trackname;
912
913 trackname = playlist_peek( start + steps );
914 if ( !trackname )
915 return -1;
916
917 DEBUGF("Loading %s\n", trackname);
918
919 mpeg_file = open(trackname, O_RDONLY);
920 if(mpeg_file < 0) {
921 DEBUGF("Couldn't open file: %s\n",trackname);
922 if(steps < 0)
923 steps--;
924 else
925 steps++;
926 }
927 else
928 {
929 struct trackdata *track = add_track_to_tag_list(trackname);
930
931 if(!track)
932 {
933 /* Bad mp3 file */
934 if(steps < 0)
935 steps--;
936 else
937 steps++;
938 close(mpeg_file);
939 mpeg_file = -1;
940 }
941 else
942 {
943 /* skip past id3v2 tag */
944 lseek(mpeg_file,
945 track->id3.first_frame_offset,
946 SEEK_SET);
947 track->id3.index = steps;
948 track->load_ahead_index = steps;
949 track->id3.offset = 0;
950
951 if(track->id3.vbr)
952 /* Average bitrate * 1.5 */
953 recalculate_watermark(
954 (track->id3.bitrate * 3) / 2);
955 else
956 recalculate_watermark(
957 track->id3.bitrate);
958
959 }
960 }
961
962 /* Bail out if no file could be opened */
963 if(abs(steps) > max_steps)
964 return -1;
965 } while ( mpeg_file < 0 );
966
967 return 0;
968 }
969
970 static void stop_playing(void)
971 {
972 struct trackdata *track;
973
974 /* Stop the current stream */
975 mp3_play_stop();
976 playing = false;
977 filling = false;
978
979 track = get_trackdata(0);
980 if (track != NULL)
981 prev_track_elapsed = track->id3.elapsed;
982
983 if(mpeg_file >= 0)
984 close(mpeg_file);
985 mpeg_file = -1;
986 remove_all_tags();
987 generate_unbuffer_events();
988 reset_mp3_buffer();
989 }
990
991 static void end_current_track(void) {
992 struct trackdata *track;
993
994 play_pending = false;
995 playing = false;
996 mp3_play_pause(false);
997
998 track = get_trackdata(0);
999 if (track != NULL)
1000 prev_track_elapsed = track->id3.elapsed;
1001
1002 reset_mp3_buffer();
1003 remove_all_tags();
1004 generate_unbuffer_events();
1005
1006 if(mpeg_file >= 0)
1007 close(mpeg_file);
1008 }
1009
1010 /* Is this a really the end of playback or is a new playlist starting */
1011 static void check_playlist_end(int direction)
1012 {
1013 /* Use the largest possible step size to account for skipped tracks */
1014 int steps = playlist_amount();
1015
1016 if (direction < 0)
1017 steps = -steps;
1018
1019 if (playlist_next(steps) < 0)
1020 is_playing = false;
1021 }
1022
1023 static void update_playlist(void)
1024 {
1025 if (num_tracks_in_memory() > 0)
1026 {
1027 struct trackdata *track = get_trackdata(0);
1028 track->id3.index = playlist_next(track->id3.index);
1029 }
1030 else
1031 {
1032 /* End of playlist? */
1033 check_playlist_end(1);
1034 }
1035
1036 playlist_update_resume_info(audio_current_track());
1037 }
1038
1039 static void track_change(void)
1040 {
1041 DEBUGF("Track change\n");
1042
1043 struct trackdata *track = get_trackdata(0);
1044 prev_track_elapsed = track->id3.elapsed;
1045
1046 #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
1047 /* Reset the AVC */
1048 sound_set_avc(-1);
1049 #endif /* (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */
1050
1051 if (num_tracks_in_memory() > 0)
1052 {
1053 remove_current_tag();
1054 update_playlist();
1055 if (is_playing)
1056 send_event(PLAYBACK_EVENT_TRACK_CHANGE, audio_current_track());
1057 }
1058
1059 current_track_counter++;
1060 }
1061
1062 unsigned long audio_prev_elapsed(void)
1063 {
1064 return prev_track_elapsed;
1065 }
1066
1067 #ifdef DEBUG
1068 void hexdump(const unsigned char *buf, int len)
1069 {
1070 int i;
1071
1072 for(i = 0;i < len;i++)
1073 {
1074 if(i && (i & 15) == 0)
1075 {
1076 DEBUGF("\n");
1077 }
1078 DEBUGF("%02x ", buf[i]);
1079 }
1080 DEBUGF("\n");
1081 }
1082 #endif /* DEBUG */
1083
1084 static void start_playback_if_ready(void)
1085 {
1086 int playable_space;
1087
1088 playable_space = audiobuf_swapwrite - audiobuf_read;
1089 if(playable_space < 0)
1090 playable_space += audiobuflen;
1091
1092 /* See if we have started playing yet. If not, do it. */
1093 if(play_pending || dma_underrun)
1094 {
1095 /* If the filling has stopped, and we still haven't reached
1096 the watermark, the file must be smaller than the
1097 watermark. We must still play it. */
1098 if((playable_space >= MPEG_PLAY_PENDING_THRESHOLD) ||
1099 !filling || dma_underrun)
1100 {
1101 DEBUGF("P\n");
1102 if (play_pending) /* don't do this when recovering from DMA underrun */
1103 {
1104 generate_postbuffer_events(); /* signal first track as buffered */
1105 if (play_pending_track_change)
1106 {
1107 play_pending_track_change = false;
1108 send_event(PLAYBACK_EVENT_TRACK_CHANGE, audio_current_track());
1109 }
1110 play_pending = false;
1111 }
1112 playing = true;
1113
1114 last_dma_chunk_size = MIN(0x2000, get_unplayed_space_current_song());
1115 mp3_play_data(audiobuf + audiobuf_read, last_dma_chunk_size, transfer_end);
1116 dma_underrun = false;
1117
1118 if (!paused)
1119 {
1120 last_dma_tick = current_tick;
1121 mp3_play_pause(true);
1122 }
1123
1124 /* Tell ourselves that we need more data */
1125 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1126 }
1127 }
1128 }
1129
1130 static bool swap_one_chunk(void)
1131 {
1132 int free_space_left;
1133 int amount_to_swap;
1134
1135 free_space_left = get_unswapped_space();
1136
1137 if(free_space_left == 0 && !play_pending)
1138 return false;
1139
1140 /* Swap in larger chunks when the user is waiting for the playback
1141 to start, or when there is dangerously little playable data left */
1142 if(play_pending)
1143 amount_to_swap = MIN(MPEG_PLAY_PENDING_SWAPSIZE, free_space_left);
1144 else
1145 {
1146 if(get_playable_space() < low_watermark)
1147 amount_to_swap = MIN(MPEG_LOW_WATER_SWAP_CHUNKSIZE,
1148 free_space_left);
1149 else
1150 amount_to_swap = MIN(MPEG_SWAP_CHUNKSIZE, free_space_left);
1151 }
1152
1153 if(audiobuf_write < audiobuf_swapwrite)
1154 amount_to_swap = MIN(audiobuflen - audiobuf_swapwrite,
1155 amount_to_swap);
1156 else
1157 amount_to_swap = MIN(audiobuf_write - audiobuf_swapwrite,
1158 amount_to_swap);
1159
1160 bitswap(audiobuf + audiobuf_swapwrite, amount_to_swap);
1161
1162 audiobuf_swapwrite += amount_to_swap;
1163 if(audiobuf_swapwrite >= audiobuflen)
1164 {
1165 audiobuf_swapwrite = 0;
1166 }
1167
1168 return true;
1169 }
1170
1171 static void mpeg_thread(void)
1172 {
1173 static int pause_tick = 0;
1174 static unsigned int pause_track = 0;
1175 struct queue_event ev;
1176 int len;
1177 int free_space_left;
1178 int unplayed_space_left;
1179 int amount_to_read;
1180 int t1, t2;
1181 int start_offset;
1182 #if CONFIG_CODEC == MAS3587F
1183 int amount_to_save;
1184 int save_endpos = 0;
1185 int rc;
1186 int level;
1187 long offset;
1188 #endif /* CONFIG_CODEC == MAS3587F */
1189
1190 is_playing = false;
1191 play_pending = false;
1192 playing = false;
1193 mpeg_file = -1;
1194
1195 while(1)
1196 {
1197 #if CONFIG_CODEC == MAS3587F
1198 if(mpeg_mode == MPEG_DECODER)
1199 {
1200 #endif /* CONFIG_CODEC == MAS3587F */
1201 yield();
1202
1203 /* Swap if necessary, and don't block on the queue_wait() */
1204 if(swap_one_chunk())
1205 {
1206 queue_wait_w_tmo(&mpeg_queue, &ev, 0);
1207 }
1208 else if (playing)
1209 {
1210 /* periodically update resume info */
1211 queue_wait_w_tmo(&mpeg_queue, &ev, HZ/2);
1212 }
1213 else
1214 {
1215 DEBUGF("S R:%x W:%x SW:%x\n",
1216 audiobuf_read, audiobuf_write, audiobuf_swapwrite);
1217 queue_wait(&mpeg_queue, &ev);
1218 }
1219
1220 start_playback_if_ready();
1221
1222 switch(ev.id)
1223 {
1224 case MPEG_PLAY:
1225 DEBUGF("MPEG_PLAY\n");
1226
1227 #if CONFIG_TUNER
1228 /* Silence the A/D input, it may be on because the radio
1229 may be playing */
1230 mas_codec_writereg(6, 0x0000);
1231 #endif /* CONFIG_TUNER */
1232
1233 /* Stop the current stream */
1234 paused = false;
1235 end_current_track();
1236
1237 if ( new_file(0) == -1 )
1238 {
1239 is_playing = false;
1240 track_change();
1241 break;
1242 }
1243
1244 start_offset = (int)ev.data;
1245
1246 /* mid-song resume? */
1247 if (start_offset) {
1248 struct mp3entry* id3 = &get_trackdata(0)->id3;
1249 lseek(mpeg_file, start_offset, SEEK_SET);
1250 id3->offset = start_offset;
1251 set_elapsed(id3);
1252 }
1253 else {
1254 /* skip past id3v2 tag */
1255 lseek(mpeg_file,
1256 get_trackdata(0)->id3.first_frame_offset,
1257 SEEK_SET);
1258
1259 }
1260
1261 /* Make it read more data */
1262 filling = true;
1263 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1264
1265 /* Tell the file loading code that we want to start playing
1266 as soon as we have some data */
1267 play_pending = true;
1268 play_pending_track_change = true;
1269
1270 update_playlist();
1271 current_track_counter++;
1272 break;
1273
1274 case MPEG_STOP:
1275 DEBUGF("MPEG_STOP\n");
1276 is_playing = false;
1277 paused = false;
1278
1279 if (playing)
1280 playlist_update_resume_info(audio_current_track());
1281
1282 stop_playing();
1283 mpeg_stop_done = true;
1284 break;
1285
1286 case MPEG_PAUSE:
1287 DEBUGF("MPEG_PAUSE\n");
1288 /* Stop the current stream */
1289 if (playing)
1290 playlist_update_resume_info(audio_current_track());
1291 paused = true;
1292 playing = false;
1293 pause_tick = current_tick;
1294 pause_track = current_track_counter;
1295 mp3_play_pause(false);
1296 break;
1297
1298 case MPEG_RESUME:
1299 DEBUGF("MPEG_RESUME\n");
1300 /* Continue the current stream */
1301 paused = false;
1302 if (!play_pending)
1303 {
1304 playing = true;
1305 if ( current_track_counter == pause_track )
1306 last_dma_tick += current_tick - pause_tick;
1307 else
1308 last_dma_tick = current_tick;
1309 pause_tick = 0;
1310 mp3_play_pause(true);
1311 }
1312 break;
1313
1314 case MPEG_NEXT:
1315 DEBUGF("MPEG_NEXT\n");
1316 /* is next track in ram? */
1317 if ( num_tracks_in_memory() > 1 ) {
1318 int unplayed_space_left, unswapped_space_left;
1319
1320 /* stop the current stream */
1321 play_pending = false;
1322 playing = false;
1323 mp3_play_pause(false);
1324
1325 track_change();
1326 audiobuf_read = get_trackdata(0)->mempos;
1327 last_dma_chunk_size = MIN(0x2000, get_unplayed_space_current_song());
1328 mp3_play_data(audiobuf + audiobuf_read, last_dma_chunk_size, transfer_end);
1329 dma_underrun = false;
1330 last_dma_tick = current_tick;
1331
1332 unplayed_space_left = get_unplayed_space();
1333 unswapped_space_left = get_unswapped_space();
1334
1335 /* should we start reading more data? */
1336 if(!filling && (unplayed_space_left < low_watermark)) {
1337 filling = true;
1338 queue_post(&mpeg_queue, MPEG_NEED_DATA, GENERATE_UNBUFFER_EVENTS);
1339 play_pending = true;
1340 } else if(unswapped_space_left &&
1341 unswapped_space_left > unplayed_space_left) {
1342 /* Stop swapping the data from the previous file */
1343 audiobuf_swapwrite = audiobuf_read;
1344 play_pending = true;
1345 } else {
1346 playing = true;
1347 if (!paused)
1348 mp3_play_pause(true);
1349 }
1350 }
1351 else {
1352 if (!playlist_check(1))
1353 break;
1354
1355 /* stop the current stream */
1356 end_current_track();
1357
1358 if (new_file(1) < 0) {
1359 DEBUGF("No more files to play\n");
1360 filling = false;
1361
1362 check_playlist_end(1);
1363 current_track_counter++;
1364 } else {
1365 /* Make it read more data */
1366 filling = true;
1367 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1368
1369 /* Tell the file loading code that we want
1370 to start playing as soon as we have some data */
1371 play_pending = true;
1372 play_pending_track_change = true;
1373
1374 update_playlist();
1375 current_track_counter++;
1376 }
1377 }
1378 break;
1379
1380 case MPEG_PREV: {
1381 DEBUGF("MPEG_PREV\n");
1382
1383 if (!playlist_check(-1))
1384 break;
1385
1386 /* stop the current stream */
1387 end_current_track();
1388
1389 /* Open the next file */
1390 if (new_file(-1) < 0) {
1391 DEBUGF("No more files to play\n");
1392 filling = false;
1393
1394 check_playlist_end(-1);
1395 current_track_counter++;
1396 } else {
1397 /* Make it read more data */
1398 filling = true;
1399 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1400
1401 /* Tell the file loading code that we want to
1402 start playing as soon as we have some data */
1403 play_pending = true;
1404 play_pending_track_change = true;
1405
1406 update_playlist();
1407 current_track_counter++;
1408 }
1409 break;
1410 }
1411
1412 case MPEG_FF_REWIND: {
1413 struct mp3entry *id3 = audio_current_track();
1414 unsigned int oldtime = id3->elapsed;
1415 unsigned int newtime = (unsigned int)ev.data;
1416 int curpos, newpos, diffpos;
1417 DEBUGF("MPEG_FF_REWIND\n");
1418
1419 id3->elapsed = newtime;
1420
1421 newpos = audio_get_file_pos();
1422 if(newpos < 0)
1423 {
1424 id3->elapsed = oldtime;
1425 break;
1426 }
1427
1428 if (mpeg_file >= 0)
1429 curpos = lseek(mpeg_file, 0, SEEK_CUR);
1430 else
1431 curpos = id3->filesize;
1432
1433 if (num_tracks_in_memory() > 1)
1434 {
1435 /* We have started loading other tracks that need to be
1436 accounted for */
1437 struct trackdata *track;
1438 int i = 0;
1439
1440 while((track = get_trackdata(i++)))
1441 {
1442 curpos += track->id3.filesize;
1443 }
1444 }
1445
1446 diffpos = curpos - newpos;
1447
1448 if(!filling && diffpos >= 0 && diffpos < audiobuflen)
1449 {
1450 int unplayed_space_left, unswapped_space_left;
1451
1452 /* We are changing to a position that's already in
1453 memory, so we just move the DMA read pointer. */
1454 audiobuf_read = audiobuf_write - diffpos;
1455 if (audiobuf_read < 0)
1456 {
1457 audiobuf_read += audiobuflen;
1458 }
1459
1460 unplayed_space_left = get_unplayed_space();
1461 unswapped_space_left = get_unswapped_space();
1462
1463 /* If unswapped_space_left is larger than
1464 unplayed_space_left, it means that the swapwrite pointer
1465 hasn't yet advanced up to the new location of the read
1466 pointer. We just move it, there is no need to swap
1467 data that won't be played anyway. */
1468
1469 if (unswapped_space_left > unplayed_space_left)
1470 {
1471 DEBUGF("Moved swapwrite\n");
1472 audiobuf_swapwrite = audiobuf_read;
1473 play_pending = true;
1474 }
1475
1476 if (mpeg_file>=0 && unplayed_space_left < low_watermark)
1477 {
1478 /* We need to load more data before starting */
1479 filling = true;
1480 queue_post(&mpeg_queue, MPEG_NEED_DATA, GENERATE_UNBUFFER_EVENTS);
1481 play_pending = true;
1482 }
1483 else
1484 {
1485 /* resume will start at new position */
1486 last_dma_chunk_size =
1487 MIN(0x2000, get_unplayed_space_current_song());
1488 mp3_play_data(audiobuf + audiobuf_read,
1489 last_dma_chunk_size, transfer_end);
1490 dma_underrun = false;
1491 }
1492 }
1493 else
1494 {
1495 /* Move to the new position in the file and start
1496 loading data */
1497 reset_mp3_buffer();
1498
1499 if (num_tracks_in_memory() > 1)
1500 {
1501 /* We have to reload the current track */
1502 close(mpeg_file);
1503 remove_all_non_current_tags();
1504 generate_unbuffer_events();
1505 mpeg_file = -1;
1506 }
1507
1508 if (mpeg_file < 0)
1509 {
1510 mpeg_file = open(id3->path, O_RDONLY);
1511 if (mpeg_file < 0)
1512 {
1513 id3->elapsed = oldtime;
1514 break;
1515 }
1516 }
1517
1518 if(-1 == lseek(mpeg_file, newpos, SEEK_SET))
1519 {
1520 id3->elapsed = oldtime;
1521 break;
1522 }
1523
1524 filling = true;
1525 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1526
1527 /* Tell the file loading code that we want to start playing
1528 as soon as we have some data */
1529 play_pending = true;
1530 }
1531
1532 id3->offset = newpos;
1533
1534 break;
1535 }
1536
1537 case MPEG_FLUSH_RELOAD: {
1538 int numtracks = num_tracks_in_memory();
1539 bool reload_track = false;
1540
1541 if (numtracks > 1)
1542 {
1543 /* Reset the buffer */
1544 audiobuf_write = get_trackdata(1)->mempos;
1545
1546 /* Reset swapwrite unless we're still swapping current
1547 track */
1548 if (get_unplayed_space() <= get_playable_space())
1549 audiobuf_swapwrite = audiobuf_write;
1550
1551 close(mpeg_file);
1552 remove_all_non_current_tags();
1553 generate_unbuffer_events();
1554 mpeg_file = -1;
1555 reload_track = true;
1556 }
1557 else if (numtracks == 1 && mpeg_file < 0)
1558 {
1559 reload_track = true;
1560 }
1561
1562 if(reload_track && new_file(1) >= 0)
1563 {
1564 /* Tell ourselves that we want more data */
1565 filling = true;
1566 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1567 }
1568
1569 break;
1570 }
1571
1572 case MPEG_NEED_DATA:
1573 free_space_left = audiobuf_read - audiobuf_write;
1574
1575 /* We interpret 0 as "empty buffer" */
1576 if(free_space_left <= 0)
1577 free_space_left += audiobuflen;
1578
1579 unplayed_space_left = audiobuflen - free_space_left;
1580
1581 /* Make sure that we don't fill the entire buffer */
1582 free_space_left -= MPEG_HIGH_WATER;
1583
1584 if (ev.data == GENERATE_UNBUFFER_EVENTS)
1585 generate_unbuffer_events();
1586
1587 /* do we have any more buffer space to fill? */
1588 if(free_space_left <= 0)
1589 {
1590 DEBUGF("0\n");
1591 filling = false;
1592 generate_postbuffer_events();
1593 storage_sleep();
1594 break;
1595 }
1596
1597 /* Read small chunks while we are below the low water mark */
1598 if(unplayed_space_left < low_watermark)
1599 amount_to_read = MIN(MPEG_LOW_WATER_CHUNKSIZE,
1600 free_space_left);
1601 else
1602 amount_to_read = free_space_left;
1603
1604 /* Don't read more than until the end of the buffer */
1605 amount_to_read = MIN(audiobuflen - audiobuf_write,
1606 amount_to_read);
1607 #if (CONFIG_STORAGE & STORAGE_MMC)
1608 /* MMC is slow, so don't read too large chunks */
1609 amount_to_read = MIN(0x40000, amount_to_read);
1610 #elif MEM == 8
1611 amount_to_read = MIN(0x100000, amount_to_read);
1612 #endif
1613
1614 /* Read as much mpeg data as we can fit in the buffer */
1615 if(mpeg_file >= 0)
1616 {
1617 DEBUGF("R\n");
1618 t1 = current_tick;
1619 len = read(mpeg_file, audiobuf + audiobuf_write,
1620 amount_to_read);
1621 if(len > 0)
1622 {
1623 t2 = current_tick;
1624 DEBUGF("time: %d\n", t2 - t1);
1625 DEBUGF("R: %x\n", len);
1626
1627 /* Now make sure that we don't feed the MAS with ID3V1
1628 data */
1629 if (len < amount_to_read)
1630 {
1631 int i;
1632 static const unsigned char tag[] = "TAG";
1633 int taglen = 128;
1634 int tagptr = audiobuf_write + len - 128;
1635
1636 /* Really rare case: entire potential tag wasn't
1637 read in this call AND audiobuf_write < 128 */
1638 if (tagptr < 0)
1639 tagptr += audiobuflen;
1640
1641 for(i = 0;i < 3;i++)
1642 {
1643 if(tagptr >= audiobuflen)
1644 tagptr -= audiobuflen;
1645
1646 if(audiobuf[tagptr] != tag[i])
1647 {
1648 taglen = 0;
1649 break;
1650 }
1651
1652 tagptr++;
1653 }
1654
1655 if(taglen)
1656 {
1657 /* Skip id3v1 tag */
1658 DEBUGF("Skipping ID3v1 tag\n");
1659 len -= taglen;
1660
1661 /* In the very rare case when the entire tag
1662 wasn't read in this read() len will be < 0.
1663 Take care of this when changing the write
1664 pointer. */
1665 }
1666 }
1667
1668 audiobuf_write += len;
1669
1670 if (audiobuf_write < 0)
1671 audiobuf_write += audiobuflen;
1672
1673 if(audiobuf_write >= audiobuflen)
1674 {
1675 audiobuf_write = 0;
1676 DEBUGF("W\n");
1677 }
1678
1679 /* Tell ourselves that we want more data */
1680 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1681 }
1682 else
1683 {
1684 if(len < 0)
1685 {
1686 DEBUGF("MPEG read error\n");
1687 }
1688
1689 close(mpeg_file);
1690 mpeg_file = -1;
1691
1692 if(new_file(1) < 0)
1693 {
1694 /* No more data to play */
1695 DEBUGF("No more files to play\n");
1696 filling = false;
1697 }
1698 else
1699 {
1700 /* Tell ourselves that we want more data */
1701 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1702 }
1703 }
1704 }
1705 break;
1706
1707 case MPEG_TRACK_CHANGE:
1708 track_change();
1709 break;
1710
1711 #ifndef USB_NONE
1712 case SYS_USB_CONNECTED:
1713 is_playing = false;
1714 paused = false;
1715 stop_playing();
1716
1717 /* Tell the USB thread that we are safe */
1718 DEBUGF("mpeg_thread got SYS_USB_CONNECTED\n");
1719 usb_acknowledge(SYS_USB_CONNECTED_ACK);
1720
1721 /* Wait until the USB cable is extracted again */
1722 usb_wait_for_disconnect(&mpeg_queue);
1723 break;
1724 #endif /* !USB_NONE */
1725
1726 #if CONFIG_CODEC == MAS3587F
1727 case MPEG_INIT_RECORDING:
1728 init_recording();
1729 init_recording_done = true;
1730 break;
1731 #endif /* CONFIG_CODEC == MAS3587F */
1732
1733 case SYS_TIMEOUT:
1734 if (playing)
1735 playlist_update_resume_info(audio_current_track());
1736 break;
1737 }
1738 #if CONFIG_CODEC == MAS3587F
1739 }
1740 else
1741 {
1742 queue_wait(&mpeg_queue, &ev);
1743 switch(ev.id)
1744 {
1745 case MPEG_RECORD:
1746 if (is_prerecording)
1747 {
1748 int startpos;
1749
1750 /* Go back prerecord_count seconds in the buffer */
1751 startpos = prerecord_index - prerecord_count;
1752 if(startpos < 0)
1753 startpos += prerecording_max_seconds;
1754
1755 /* Read the position data from the prerecord buffer */
1756 frame_count_start = prerecord_buffer[startpos].framecount;
1757 startpos = prerecord_buffer[startpos].mempos;
1758
1759 DEBUGF("Start looking at address %x (%x)\n",
1760 audiobuf+startpos, startpos);
1761
1762 saved_header = mpeg_get_last_header();
1763
1764 mem_find_next_frame(startpos, &offset, 1800,
1765 saved_header);
1766
1767 audiobuf_read = startpos + offset;
1768 if(audiobuf_read >= audiobuflen)
1769 audiobuf_read -= audiobuflen;
1770
1771 DEBUGF("New audiobuf_read address: %x (%x)\n",
1772 audiobuf+audiobuf_read, audiobuf_read);
1773
1774 level = disable_irq_save();
1775 num_rec_bytes = get_unsaved_space();
1776 restore_irq(level);
1777 }
1778 else
1779 {
1780 frame_count_start = 0;
1781 num_rec_bytes = 0;
1782 audiobuf_read = MPEG_RESERVED_HEADER_SPACE;
1783 audiobuf_write = MPEG_RESERVED_HEADER_SPACE;
1784 }
1785
1786 prepend_header();
1787 DEBUGF("Recording...\n");
1788 start_recording();
1789
1790 /* Wait until at least one frame is encoded and get the
1791 frame header, for later use by the Xing header
1792 generation */
1793 sleep(HZ/5);
1794 saved_header = mpeg_get_last_header();
1795
1796 /* delayed until buffer is saved, don't open yet */
1797 strcpy(delayed_filename, recording_filename);
1798 mpeg_file = -1;
1799
1800 break;
1801
1802 case MPEG_STOP:
1803 DEBUGF("MPEG_STOP\n");
1804
1805 stop_recording();
1806
1807 /* Save the remaining data in the buffer */
1808 save_endpos = audiobuf_write;
1809 saving_status = STOP_RECORDING;
1810 queue_post(&mpeg_queue, MPEG_SAVE_DATA, 0);
1811 break;
1812
1813 case MPEG_STOP_DONE:
1814 DEBUGF("MPEG_STOP_DONE\n");
1815
1816 if (mpeg_file >= 0)
1817 close(mpeg_file);
1818 mpeg_file = -1;
1819
1820 update_header();
1821 #ifdef DEBUG1
1822 {
1823 int i;
1824 for(i = 0;i < 512;i++)
1825 {
1826 DEBUGF("%d - %d us (%d bytes)\n",
1827 timing_info[i*2],
1828 (timing_info[i*2+1] & 0xffff) *
1829 10000 / 13824,
1830 timing_info[i*2+1] >> 16);
1831 }
1832 }
1833 #endif /* DEBUG1 */
1834
1835 if (prerecording)
1836 {
1837 start_prerecording();
1838 }
1839 mpeg_stop_done = true;
1840 break;
1841
1842 case MPEG_NEW_FILE:
1843 /* Bail out when a more important save is happening */
1844 if (saving_status > NEW_FILE)
1845 break;
1846
1847 /* Make sure we have at least one complete frame
1848 in the buffer. If we haven't recorded a single
1849 frame within 200ms, the MAS is probably not recording
1850 anything, and we bail out. */
1851 amount_to_save = get_unsaved_space();
1852 if (amount_to_save < 1800)
1853 {
1854 sleep(HZ/5);
1855 amount_to_save = get_unsaved_space();
1856 }
1857
1858 mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_FRAME_COUNT,
1859 &frame_count_end, 1);
1860
1861 last_rec_time = current_tick - record_start_time;
1862 record_start_time = current_tick;
1863 if (paused)
1864 pause_start_time = record_start_time;
1865
1866 /* capture all values at one point */
1867 level = disable_irq_save();
1868 save_endpos = audiobuf_write;
1869 last_rec_bytes = num_rec_bytes;
1870 num_rec_bytes = 0;
1871 restore_irq(level);
1872
1873 if (amount_to_save >= 1800)
1874 {
1875 /* Now find a frame boundary to split at */
1876 save_endpos -= 1800;
1877 if (save_endpos < 0)
1878 save_endpos += audiobuflen;
1879
1880 rc = mem_find_next_frame(save_endpos, &offset, 1800,
1881 saved_header);
1882 if (!rc) /* No header found, save whole buffer */
1883 offset = 1800;
1884
1885 save_endpos += offset;
1886 if (save_endpos >= audiobuflen)
1887 save_endpos -= audiobuflen;
1888
1889 last_rec_bytes += offset - 1800;
1890 level = disable_irq_save();
1891 num_rec_bytes += 1800 - offset;
1892 restore_irq(level);
1893 }
1894
1895 saving_status = NEW_FILE;
1896 queue_post(&mpeg_queue, MPEG_SAVE_DATA, 0);
1897 break;
1898
1899 case MPEG_SAVE_DATA:
1900 if (saving_status == BUFFER_FULL)
1901 save_endpos = audiobuf_write;
1902
1903 if (mpeg_file < 0) /* delayed file open */
1904 {
1905 mpeg_file = open(delayed_filename, O_WRONLY|O_CREAT);
1906
1907 if (mpeg_file < 0)
1908 panicf("recfile: %d", mpeg_file);
1909 }
1910
1911 amount_to_save = save_endpos - audiobuf_read;
1912 if (amount_to_save < 0)
1913 amount_to_save += audiobuflen;
1914
1915 amount_to_save = MIN(amount_to_save,
1916 audiobuflen - audiobuf_read);
1917 #if (CONFIG_STORAGE & STORAGE_MMC)
1918 /* MMC is slow, so don't save too large chunks at once */
1919 amount_to_save = MIN(0x40000, amount_to_save);
1920 #elif MEM == 8
1921 amount_to_save = MIN(0x100000, amount_to_save);
1922 #endif
1923 rc = write(mpeg_file, audiobuf + audiobuf_read,
1924 amount_to_save);
1925 if (rc < 0)
1926 {
1927 if (errno == ENOSPC)
1928 {
1929 mpeg_errno = AUDIOERR_DISK_FULL;
1930 stop_recording();
1931 queue_post(&mpeg_queue, MPEG_STOP_DONE, 0);
1932 /* will close the file */
1933 break;
1934 }
1935 else
1936 panicf("rec wrt: %d", rc);
1937 }
1938
1939 audiobuf_read += amount_to_save;
1940 if (audiobuf_read >= audiobuflen)
1941 audiobuf_read = 0;
1942
1943 if (audiobuf_read == save_endpos) /* all saved */
1944 {
1945 switch (saving_status)
1946 {
1947 case BUFFER_FULL:
1948 rc = fsync(mpeg_file);
1949 if (rc < 0)
1950 panicf("rec fls: %d", rc);
1951 storage_sleep();
1952 break;
1953
1954 case NEW_FILE:
1955 /* Close the current file */
1956 rc = close(mpeg_file);
1957 if (rc < 0)
1958 panicf("rec cls: %d", rc);
1959 mpeg_file = -1;
1960 update_header();
1961 storage_sleep();
1962
1963 /* copy new filename */
1964 strcpy(delayed_filename, recording_filename);
1965 prepend_header();
1966 frame_count_start = frame_count_end;
1967 break;
1968
1969 case STOP_RECORDING:
1970 queue_post(&mpeg_queue, MPEG_STOP_DONE, 0);
1971 /* will close the file */
1972 break;
1973
1974 default:
1975 break;
1976 }
1977 saving_status = NOT_SAVING;
1978 }
1979 else /* tell ourselves to save the next chunk */
1980 queue_post(&mpeg_queue, MPEG_SAVE_DATA, 0);
1981
1982 break;
1983
1984 case MPEG_PRERECORDING_TICK:
1985 if(!is_prerecording)
1986 break;
1987
1988 /* Store the write pointer every second */
1989 prerecord_buffer[prerecord_index].mempos = audiobuf_write;
1990 mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_FRAME_COUNT,
1991 &prerecord_buffer[prerecord_index].framecount, 1);
1992
1993 /* Wrap if necessary */
1994 if(++prerecord_index == prerecording_max_seconds)
1995 prerecord_index = 0;
1996
1997 /* Update the number of seconds recorded */
1998 if(prerecord_count < prerecording_max_seconds)
1999 prerecord_count++;
2000 break;
2001
2002 case MPEG_INIT_PLAYBACK:
2003 /* Stop the prerecording */
2004 stop_recording();
2005 reset_mp3_buffer();
2006 mp3_play_init();
2007 init_playback_done = true;
2008 break;
2009
2010 case MPEG_PAUSE_RECORDING:
2011 pause_recording();
2012 break;
2013
2014 case MPEG_RESUME_RECORDING:
2015 resume_recording();
2016 break;
2017
2018 case SYS_USB_CONNECTED:
2019 /* We can safely go to USB mode if no recording
2020 is taking place */
2021 if((!is_recording || is_prerecording) && mpeg_stop_done)
2022 {
2023 /* Even if we aren't recording, we still call this
2024 function, to put the MAS in monitoring mode,
2025 to save power. */
2026 stop_recording();
2027
2028 /* Tell the USB thread that we are safe */
2029 DEBUGF("mpeg_thread got SYS_USB_CONNECTED\n");
2030 usb_acknowledge(SYS_USB_CONNECTED_ACK);
2031
2032 /* Wait until the USB cable is extracted again */
2033 usb_wait_for_disconnect(&mpeg_queue);
2034 }
2035 break;
2036 }
2037 }
2038 #endif /* CONFIG_CODEC == MAS3587F */
2039 }
2040 }
2041 #endif /* !SIMULATOR */
2042
2043 struct mp3entry* audio_current_track()
2044 {
2045 #ifdef SIMULATOR
2046 struct mp3entry *id3 = &taginfo;
2047 #else /* !SIMULATOR */
2048 if(num_tracks_in_memory())
2049 {
2050 struct mp3entry *id3 = &get_trackdata(0)->id3;
2051 #endif
2052 if (!checked_for_cuesheet && curr_cuesheet && id3->cuesheet == NULL)
2053 {
2054 checked_for_cuesheet = true; /* only check once per track */
2055 char cuepath[MAX_PATH];
2056
2057 if (look_for_cuesheet_file(id3->path, cuepath) &&
2058 parse_cuesheet(cuepath, curr_cuesheet))
2059 {
2060 id3->cuesheet = curr_cuesheet;
2061 cue_spoof_id3(curr_cuesheet, id3);
2062 }
2063 }
2064 return id3;
2065 #ifndef SIMULATOR
2066 }
2067 else
2068 return NULL;
2069 #endif /* !SIMULATOR */
2070 }
2071
2072 struct mp3entry* audio_next_track()
2073 {
2074 #ifdef SIMULATOR
2075 return &taginfo;
2076 #else /* !SIMULATOR */
2077 if(num_tracks_in_memory() > 1)
2078 return &get_trackdata(1)->id3;
2079 else
2080 return NULL;
2081 #endif /* !SIMULATOR */
2082 }
2083
2084 #if CONFIG_CODEC == MAS3587F
2085 #ifndef SIMULATOR
2086 void audio_init_playback(void)
2087 {
2088 init_playback_done = false;
2089 queue_post(&mpeg_queue, MPEG_INIT_PLAYBACK, 0);
2090
2091 while(!init_playback_done)
2092 sleep(1);
2093 }
2094
2095
2096 /****************************************************************************
2097 * Recording functions
2098 ***************************************************************************/
2099 void audio_init_recording(unsigned int buffer_offset)
2100 {
2101 buffer_offset = buffer_offset;
2102 init_recording_done = false;
2103 queue_post(&mpeg_queue, MPEG_INIT_RECORDING, 0);
2104
2105 while(!init_recording_done)
2106 sleep(1);
2107 }
2108
2109 static void init_recording(void)
2110 {
2111 unsigned long val;
2112 int rc;
2113
2114 /* Disable IRQ6 */
2115 IPRB &= 0xff0f;
2116
2117 stop_playing();
2118 is_playing = false;
2119 paused = false;
2120
2121 /* Init the recording variables */
2122 is_recording = false;
2123 is_prerecording = false;
2124
2125 mpeg_stop_done = true;
2126
2127 mas_reset();
2128
2129 /* Enable the audio CODEC and the DSP core, max analog voltage range */
2130 rc = mas_direct_config_write(MAS_CONTROL, 0x8c00);
2131 if(rc < 0)
2132 panicf("mas_ctrl_w: %d", rc);
2133
2134 /* Stop the current application */
2135 val = 0;
2136 mas_writemem(MAS_BANK_D0, MAS_D0_APP_SELECT, &val, 1);
2137 do
2138 {
2139 mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1);
2140 } while(val);
2141
2142 /* Perform black magic as described by the data sheet */
2143 if((mas_version_code & 0x0fff) == 0x0102)
2144 {
2145 DEBUGF("Performing MAS black magic for B2 version\n");
2146 mas_writereg(0xa3, 0x98);
2147 mas_writereg(0x94, 0xfffff);
2148 val = 0;
2149 mas_writemem(MAS_BANK_D1, 0, &val, 1);
2150 mas_writereg(0xa3, 0x90);
2151 }
2152
2153 /* Enable A/D Converters */
2154 shadow_codec_reg0 = 0xcccd;
2155 mas_codec_writereg(0x0, shadow_codec_reg0);
2156
2157 /* Copy left channel to right (mono mode) */
2158 mas_codec_writereg(8, 0x8000);
2159
2160 /* ADC scale 0%, DSP scale 100%
2161 We use the DSP output for monitoring, because it works with all
2162 sources including S/PDIF */
2163 mas_codec_writereg(6, 0x0000);
2164 mas_codec_writereg(7, 0x4000);
2165
2166 /* No mute */
2167 shadow_soft_mute = 0;
2168 mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &shadow_soft_mute, 1);
2169
2170 #ifdef HAVE_SPDIF_OUT
2171 val = 0x09; /* Disable SDO and SDI, low impedance S/PDIF outputs */
2172 #else
2173 val = 0x2d; /* Disable SDO and SDI, disable S/PDIF output */
2174 #endif
2175 mas_writemem(MAS_BANK_D0, MAS_D0_INTERFACE_CONTROL, &val, 1);
2176
2177 /* Set Demand mode, monitoring OFF and validate all settings */
2178 shadow_io_control_main = 0x125;
2179 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2180
2181 /* Start the encoder application */
2182 val = 0x40;
2183 mas_writemem(MAS_BANK_D0, MAS_D0_APP_SELECT, &val, 1);
2184 do
2185 {
2186 mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1);
2187 } while(!(val & 0x40));
2188
2189 /* We have started the recording application with monitoring OFF.
2190 This is because we want to record at least one frame to fill the DMA
2191 buffer, because the silly MAS will not negate EOD until at least one
2192 DMA transfer has taken place.
2193 Now let's wait for some data to be encoded. */
2194 sleep(HZ/5);
2195
2196 /* Now set it to Monitoring mode as default, saves power */
2197 shadow_io_control_main = 0x525;
2198 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2199
2200 /* Wait until the DSP has accepted the settings */
2201 do
2202 {
2203 mas_readmem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &val,1);
2204 } while(val & 1);
2205
2206 drain_dma_buffer();
2207 mpeg_mode = MPEG_ENCODER;
2208
2209 DEBUGF("MAS Recording application started\n");
2210
2211 /* At this point, all settings are the reset MAS defaults, next thing is to
2212 call mpeg_set_recording_options(). */
2213 }
2214
2215 void audio_record(const char *filename)
2216 {
2217 mpeg_errno = 0;
2218
2219 strlcpy(recording_filename, filename, MAX_PATH);
2220
2221 queue_post(&mpeg_queue, MPEG_RECORD, 0);
2222 }
2223
2224 void audio_pause_recording(void)
2225 {
2226 queue_post(&mpeg_queue, MPEG_PAUSE_RECORDING, 0);
2227 }
2228
2229 void audio_resume_recording(void)
2230 {
2231 queue_post(&mpeg_queue, MPEG_RESUME_RECORDING, 0);
2232 }
2233
2234 static void prepend_header(void)
2235 {
2236 int startpos;
2237 unsigned i;
2238
2239 /* Make room for header */
2240 audiobuf_read -= MPEG_RESERVED_HEADER_SPACE;
2241 if(audiobuf_read < 0)
2242 {
2243 /* Clear the bottom half */
2244 memset(audiobuf, 0, audiobuf_read + MPEG_RESERVED_HEADER_SPACE);
2245
2246 /* And the top half */
2247 audiobuf_read += audiobuflen;
2248 memset(audiobuf + audiobuf_read, 0, audiobuflen - audiobuf_read);
2249 }
2250 else
2251 {
2252 memset(audiobuf + audiobuf_read, 0, MPEG_RESERVED_HEADER_SPACE);
2253 }
2254 /* Copy the empty ID3 header */
2255 startpos = audiobuf_read;
2256 for(i = 0; i < sizeof(empty_id3_header); i++)
2257 {
2258 audiobuf[startpos++] = empty_id3_header[i];
2259 if(startpos == audiobuflen)
2260 startpos = 0;
2261 }
2262 }
2263
2264 static void update_header(void)
2265 {
2266 int fd, framelen;
2267 unsigned long frames;
2268
2269 if (last_rec_bytes > 0)
2270 {
2271 /* Create the Xing header */
2272 fd = open(delayed_filename, O_RDWR);
2273 if (fd < 0)
2274 panicf("rec upd: %d (%s)", fd, recording_filename);
2275
2276 frames = frame_count_end - frame_count_start;
2277 /* If the number of recorded frames has reached 0x7ffff,
2278 we can no longer trust it */
2279 if (frame_count_end == 0x7ffff)
2280 frames = 0;
2281
2282 /* saved_header is saved right before stopping the MAS */
2283 framelen = create_xing_header(fd, 0, last_rec_bytes, xing_buffer,
2284 frames, last_rec_time * (1000/HZ),
2285 saved_header, NULL, false);
2286
2287 lseek(fd, MPEG_RESERVED_HEADER_SPACE - framelen, SEEK_SET);
2288 write(fd, xing_buffer, framelen);
2289 close(fd);
2290 }
2291 }
2292
2293 static void start_prerecording(void)
2294 {
2295 unsigned long val;
2296
2297 DEBUGF("Starting prerecording\n");
2298
2299 prerecord_index = 0;
2300 prerecord_count = 0;
2301 prerecord_timeout = current_tick + HZ;
2302 memset(prerecord_buffer, 0, sizeof(prerecord_buffer));
2303 reset_mp3_buffer();
2304
2305 is_prerecording = true;
2306
2307 /* Stop monitoring and start the encoder */
2308 shadow_io_control_main &= ~(1 << 10);
2309 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2310 DEBUGF("mas_writemem(MAS_BANK_D0, IO_CONTROL_MAIN, %x)\n", shadow_io_control_main);
2311
2312 /* Wait until the DSP has accepted the settings */
2313 do
2314 {
2315 mas_readmem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &val,1);
2316 } while(val & 1);
2317
2318 is_recording = true;
2319 saving_status = NOT_SAVING;
2320
2321 demand_irq_enable(true);
2322 }
2323
2324 static void start_recording(void)
2325 {
2326 unsigned long val;
2327
2328 if(is_prerecording)
2329 {
2330 /* This will make the IRQ handler start recording
2331 for real, i.e send MPEG_SAVE_DATA messages when
2332 the buffer is full */
2333 is_prerecording = false;
2334 }
2335 else
2336 {
2337 /* If prerecording is off, we need to stop the monitoring
2338 and start the encoder */
2339 shadow_io_control_main &= ~(1 << 10);
2340 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2341 DEBUGF("mas_writemem(MAS_BANK_D0, IO_CONTROL_MAIN, %x)\n", shadow_io_control_main);
2342
2343 /* Wait until the DSP has accepted the settings */
2344 do
2345 {
2346 mas_readmem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &val,1);
2347 } while(val & 1);
2348 }
2349
2350 is_recording = true;
2351 saving_status = NOT_SAVING;
2352 paused = false;
2353
2354 /* Store the current time */
2355 if(prerecording)
2356 record_start_time = current_tick - prerecord_count * HZ;
2357 else
2358 record_start_time = current_tick;
2359
2360 pause_start_time = 0;
2361
2362 demand_irq_enable(true);
2363 }
2364
2365 static void pause_recording(void)
2366 {
2367 pause_start_time = current_tick;
2368
2369 /* Set the pause bit */
2370 shadow_soft_mute |= 2;
2371 mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &shadow_soft_mute, 1);
2372
2373 paused = true;
2374 }
2375
2376 static void resume_recording(void)
2377 {
2378 paused = false;
2379
2380 /* Clear the pause bit */
2381 shadow_soft_mute &= ~2;
2382 mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &shadow_soft_mute, 1);
2383
2384 /* Compensate for the time we have been paused */
2385 if(pause_start_time)
2386 {
2387 record_start_time =
2388 current_tick - (pause_start_time - record_start_time);
2389 pause_start_time = 0;
2390 }
2391 }
2392
2393 static void stop_recording(void)
2394 {
2395 unsigned long val;
2396
2397 /* Let it finish the last frame */
2398 if(!paused)
2399 pause_recording();
2400 sleep(HZ/5);
2401
2402 demand_irq_enable(false);
2403
2404 is_recording = false;
2405 is_prerecording = false;
2406
2407 last_rec_bytes = num_rec_bytes;
2408 mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_FRAME_COUNT, &frame_count_end, 1);
2409 last_rec_time = current_tick - record_start_time;
2410
2411 /* Start monitoring */
2412 shadow_io_control_main |= (1 << 10);
2413 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2414 DEBUGF("mas_writemem(MAS_BANK_D0, IO_CONTROL_MAIN, %x)\n", shadow_io_control_main);
2415
2416 /* Wait until the DSP has accepted the settings */
2417 do
2418 {
2419 mas_readmem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &val,1);
2420 } while(val & 1);
2421
2422 resume_recording();
2423 }
2424
2425 void audio_set_recording_options(struct audio_recording_options *options)
2426 {
2427 bool is_mpeg1;
2428
2429 is_mpeg1 = (options->rec_frequency < 3);
2430
2431 rec_version_index = is_mpeg1?3:2;
2432 rec_frequency_index = options->rec_frequency % 3;
2433
2434 shadow_encoder_control = (options->rec_quality << 17) |
2435 (rec_frequency_index << 10) |
2436 ((is_mpeg1?1:0) << 9) |
2437 (((options->rec_channels * 2 + 1) & 3) << 6) |
2438 (1 << 5) /* MS-stereo */ |
2439 (1 << 2) /* Is an original */;
2440 mas_writemem(MAS_BANK_D0, MAS_D0_ENCODER_CONTROL, &shadow_encoder_control,1);
2441
2442 DEBUGF("mas_writemem(MAS_BANK_D0, ENCODER_CONTROL, %x)\n", shadow_encoder_control);
2443
2444 #if CONFIG_TUNER & S1A0903X01
2445 /* Store the (unpitched) MAS PLL frequency. Used for avoiding FM
2446 interference with the Samsung tuner. */
2447 if (rec_frequency_index)
2448 mas_store_pllfreq(24576000);
2449 else
2450 mas_store_pllfreq(22579000);
2451 #endif
2452
2453 shadow_soft_mute = options->rec_editable?4:0;
2454 mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &shadow_soft_mute,1);
2455
2456 DEBUGF("mas_writemem(MAS_BANK_D0, SOFT_MUTE, %x)\n", shadow_soft_mute);
2457
2458 shadow_io_control_main = ((1 << 10) | /* Monitoring ON */
2459 ((options->rec_source < 2)?1:2) << 8) | /* Input select */
2460 (1 << 5) | /* SDO strobe invert */
2461 ((is_mpeg1?0:1) << 3) |
2462 (1 << 2) | /* Inverted SIBC clock signal */
2463 1; /* Validate */
2464 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main,1);
2465
2466 DEBUGF("mas_writemem(MAS_BANK_D0, IO_CONTROL_MAIN, %x)\n", shadow_io_control_main);
2467
2468 if(options->rec_source == AUDIO_SRC_MIC)
2469 {
2470 /* Copy left channel to right (mono mode) */
2471 mas_codec_writereg(8, 0x8000);
2472 }
2473 else
2474 {
2475 /* Stereo input mode */
2476 mas_codec_writereg(8, 0);
2477 }
2478
2479 prerecording_max_seconds = options->rec_prerecord_time;
2480 if(prerecording_max_seconds)
2481 {
2482 prerecording = true;
2483 start_prerecording();
2484 }
2485 else
2486 {
2487 prerecording = false;
2488 is_prerecording = false;
2489 is_recording = false;
2490 }
2491 }
2492
2493 /* If use_mic is true, the left gain is used */
2494 void audio_set_recording_gain(int left, int right, int type)
2495 {
2496 /* Enable both left and right A/D */
2497 shadow_codec_reg0 = (left << 12) |
2498 (right << 8) |
2499 (left << 4) |
2500 (type==AUDIO_GAIN_MIC?0x0008:0) | /* Connect left A/D to mic */
2501 0x0007;
2502 mas_codec_writereg(0x0, shadow_codec_reg0);
2503 }
2504
2505 /* try to make some kind of beep, also in recording mode */
2506 void audio_beep(int duration)
2507 {
2508 long starttick = current_tick;
2509 do
2510 { /* toggle bit 0 of codec register 0, toggling the DAC off & on.
2511 * While this is still audible even without an external signal,
2512 * it doesn't affect the (pre-)recording. */
2513 mas_codec_writereg(0, shadow_codec_reg0 ^ 1);
2514 mas_codec_writereg(0, shadow_codec_reg0);
2515 yield();
2516 }
2517 while (current_tick - starttick < duration);
2518 }
2519
2520 void audio_new_file(const char *filename)
2521 {
2522 mpeg_errno = 0;
2523
2524 strlcpy(recording_filename, filename, MAX_PATH);
2525
2526 queue_post(&mpeg_queue, MPEG_NEW_FILE, 0);
2527 }
2528
2529 unsigned long audio_recorded_time(void)
2530 {
2531 if(is_prerecording)
2532 return prerecord_count * HZ;
2533
2534 if(is_recording)
2535 {
2536 if(paused)
2537 return pause_start_time - record_start_time;
2538 else
2539 return current_tick - record_start_time;
2540 }
2541
2542 return 0;
2543 }
2544
2545 unsigned long audio_num_recorded_bytes(void)
2546 {
2547 int num_bytes;
2548 int index;
2549
2550 if(is_recording)
2551 {
2552 if(is_prerecording)
2553 {
2554 index = prerecord_index - prerecord_count;
2555 if(index < 0)
2556 index += prerecording_max_seconds;
2557
2558 num_bytes = audiobuf_write - prerecord_buffer[index].mempos;
2559 if(num_bytes < 0)
2560 num_bytes += audiobuflen;
2561
2562 return num_bytes;
2563 }
2564 else
2565 return num_rec_bytes;
2566 }
2567 else
2568 return 0;
2569 }
2570
2571 #else /* SIMULATOR */
2572
2573 /* dummies coming up */
2574
2575 void audio_init_playback(void)
2576 {
2577 /* a dummy */
2578 }
2579 unsigned long audio_recorded_time(void)
2580 {
2581 /* a dummy */
2582 return 0;
2583 }
2584 void audio_beep(int duration)
2585 {
2586 /* a dummy */
2587 (void)duration;
2588 }
2589 void audio_pause_recording(void)
2590 {
2591 /* a dummy */
2592 }
2593 void audio_resume_recording(void)
2594 {
2595 /* a dummy */
2596 }
2597 unsigned long audio_num_recorded_bytes(void)
2598 {
2599 /* a dummy */
2600 return 0;
2601 }
2602 void audio_record(const char *filename)
2603 {
2604 /* a dummy */
2605 (void)filename;
2606 }
2607 void audio_new_file(const char *filename)
2608 {
2609 /* a dummy */
2610 (void)filename;
2611 }
2612
2613 void audio_set_recording_gain(int left, int right, int type)
2614 {
2615 /* a dummy */
2616 (void)left;
2617 (void)right;
2618 (void)type;
2619 }
2620 void audio_init_recording(unsigned int buffer_offset)
2621 {
2622 /* a dummy */
2623 (void)buffer_offset;
2624 }
2625 void audio_set_recording_options(struct audio_recording_options *options)
2626 {
2627 /* a dummy */
2628 (void)options;
2629 }
2630 #endif /* SIMULATOR */
2631 #endif /* CONFIG_CODEC == MAS3587F */
2632
2633 void audio_play(long offset)
2634 {
2635 #ifdef SIMULATOR
2636 char* trackname;
2637 int steps=0;
2638
2639 is_playing = true;
2640
2641 do {
2642 trackname = playlist_peek( steps );
2643 if (!trackname)
2644 break;
2645 if(mp3info(&taginfo, trackname)) {
2646 /* bad mp3, move on */
2647 if(++steps > playlist_amount())
2648 break;
2649 continue;
2650 }
2651 #ifdef HAVE_MPEG_PLAY
2652 real_mpeg_play(trackname);
2653 #endif
2654 playlist_next(steps);
2655 taginfo.offset = offset;
2656 set_elapsed(&taginfo);
2657 is_playing = true;
2658 playing = true;
2659 break;
2660 } while(1);
2661 #else /* !SIMULATOR */
2662 is_playing = true;
2663
2664 queue_post(&mpeg_queue, MPEG_PLAY, offset);
2665 #endif /* !SIMULATOR */
2666
2667 mpeg_errno = 0;
2668 }
2669
2670 void audio_stop(void)
2671 {
2672 #ifndef SIMULATOR
2673 if (playing)
2674 {
2675 struct trackdata *track = get_trackdata(0);
2676 prev_track_elapsed = track->id3.elapsed;
2677 }
2678 mpeg_stop_done = false;
2679 queue_post(&mpeg_queue, MPEG_STOP, 0);
2680 while(!mpeg_stop_done)
2681 yield();
2682 #else /* SIMULATOR */
2683 paused = false;
2684 is_playing = false;
2685 playing = false;
2686 #endif /* SIMULATOR */
2687 }
2688
2689 /* dummy */
2690 void audio_stop_recording(void)
2691 {
2692 audio_stop();
2693 }
2694
2695 void audio_pause(void)
2696 {
2697 #ifndef SIMULATOR
2698 queue_post(&mpeg_queue, MPEG_PAUSE, 0);
2699 #else /* SIMULATOR */
2700 is_playing = true;
2701 playing = false;
2702 paused = true;
2703 #endif /* SIMULATOR */
2704 }
2705
2706 void audio_resume(void)
2707 {
2708 #ifndef SIMULATOR
2709 queue_post(&mpeg_queue, MPEG_RESUME, 0);
2710 #else /* SIMULATOR */
2711 is_playing = true;
2712 playing = true;
2713 paused = false;
2714 #endif /* SIMULATOR */
2715 }
2716
2717 void audio_next(void)
2718 {
2719 #ifndef SIMULATOR
2720 queue_remove_from_head(&mpeg_queue, MPEG_NEED_DATA);
2721 queue_post(&mpeg_queue, MPEG_NEXT, 0);
2722 #else /* SIMULATOR */
2723 char* file;
2724 int steps = 1;
2725 int index;
2726
2727 do {
2728 file = playlist_peek(steps);
2729 if(!file)
2730 break;
2731 if(mp3info(&taginfo, file)) {
2732 if(++steps > playlist_amount())
2733 break;
2734 continue;
2735 }
2736 index = playlist_next(steps);
2737 taginfo.index = index;
2738 current_track_counter++;
2739 is_playing = true;
2740 playing = true;
2741 break;
2742 } while(1);
2743 #endif /* SIMULATOR */
2744 }
2745
2746 void audio_prev(void)
2747 {
2748 #ifndef SIMULATOR
2749 queue_remove_from_head(&mpeg_queue, MPEG_NEED_DATA);
2750 queue_post(&mpeg_queue, MPEG_PREV, 0);
2751 #else /* SIMULATOR */
2752 char* file;
2753 int steps = -1;
2754 int index;
2755
2756 do {
2757 file = playlist_peek(steps);
2758 if(!file)
2759 break;
2760 if(mp3info(&taginfo, file)) {
2761 steps--;
2762 continue;
2763 }
2764 index = playlist_next(steps);
2765 taginfo.index = index;
2766 current_track_counter++;
2767 is_playing = true;
2768 playing = true;
2769 break;
2770 } while(1);
2771 #endif /* SIMULATOR */
2772 }
2773
2774 void audio_ff_rewind(long newtime)
2775 {
2776 #ifndef SIMULATOR
2777 queue_post(&mpeg_queue, MPEG_FF_REWIND, newtime);
2778 #else /* SIMULATOR */
2779 (void)newtime;
2780 #endif /* SIMULATOR */
2781 }
2782
2783 void audio_flush_and_reload_tracks(void)
2784 {
2785 #ifndef SIMULATOR
2786 queue_post(&mpeg_queue, MPEG_FLUSH_RELOAD, 0);
2787 #endif /* !SIMULATOR*/
2788 }
2789
2790 int audio_status(void)
2791 {
2792 int ret = 0;
2793
2794 if(is_playing)
2795 ret |= AUDIO_STATUS_PLAY;
2796
2797 if(paused)
2798 ret |= AUDIO_STATUS_PAUSE;
2799
2800 #if (CONFIG_CODEC == MAS3587F) && !defined(SIMULATOR)
2801 if(is_recording && !is_prerecording)
2802 ret |= AUDIO_STATUS_RECORD;
2803
2804 if(is_prerecording)
2805 ret |= AUDIO_STATUS_PRERECORD;
2806 #endif /* CONFIG_CODEC == MAS3587F */
2807
2808 if(mpeg_errno)
2809 ret |= AUDIO_STATUS_ERROR;
2810
2811 return ret;
2812 }
2813
2814 unsigned int audio_error(void)
2815 {
2816 return mpeg_errno;
2817 }
2818
2819 void audio_error_clear(void)
2820 {
2821 mpeg_errno = 0;
2822 }
2823
2824 #ifdef SIMULATOR
2825 static void mpeg_thread(void)
2826 {
2827 struct mp3entry* id3;
2828 while ( 1 ) {
2829 if (is_playing) {
2830 id3 = audio_current_track();
2831 if (!paused)
2832 {
2833 id3->elapsed+=1000;
2834 id3->offset+=1000;
2835 }
2836 if (id3->elapsed>=id3->length)
2837 audio_next();
2838 }
2839 sleep(HZ);
2840 }
2841 }
2842 #endif /* SIMULATOR */
2843
2844 void audio_init(void)
2845 {
2846 mpeg_errno = 0;
2847 /* cuesheet support */
2848 if (global_settings.cuesheet)
2849 curr_cuesheet = (struct cuesheet*)buffer_alloc(sizeof(struct cuesheet));
2850
2851 #ifndef SIMULATOR
2852 audiobuflen = audiobufend - audiobuf;
2853 queue_init(&mpeg_queue, true);
2854 #endif /* !SIMULATOR */
2855 create_thread(mpeg_thread, mpeg_stack,
2856 sizeof(mpeg_stack), 0, mpeg_thread_name
2857 IF_PRIO(, PRIORITY_SYSTEM)
2858 IF_COP(, CPU));
2859
2860 memset(trackdata, 0, sizeof(trackdata));
2861
2862 #if (CONFIG_CODEC == MAS3587F) && !defined(SIMULATOR)
2863 if (HW_MASK & PR_ACTIVE_HIGH)
2864 and_b(~0x08, &PADRH);
2865 else
2866 or_b(0x08, &PADRH);
2867 #endif /* CONFIG_CODEC == MAS3587F */
2868
2869 #ifdef DEBUG
2870 #ifndef SIMULATOR
2871 dbg_timer_start();
2872 dbg_cnt2us(0);
2873 #endif /* !SIMULATOR */
2874 #endif /* DEBUG */
2875 }
2876
2877 #endif /* CONFIG_CODEC != SWCODEC */
My public Rockbox git repo