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very minor code police. also fix a possible but unlikely missed cpu_boost(false)
[Rockbox.git] / firmware / mpeg.c
blob530de6a372d322b89ca32ca4fc42ca95350c82a2
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 "id3.h"
30 #include "mpeg.h"
31 #include "audio.h"
32 #include "ata.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 "events.h"
43 #ifndef SIMULATOR
44 #include "i2c.h"
45 #include "mas.h"
46 #include "dac.h"
47 #include "system.h"
48 #include "usb.h"
49 #include "file.h"
50 #include "hwcompat.h"
51 #endif /* !SIMULATOR */
52 #ifdef HAVE_LCD_BITMAP
53 #include "lcd.h"
54 #endif
55
56 #ifndef SIMULATOR
57 extern unsigned long mas_version_code;
58 #endif
59
60 #if CONFIG_CODEC == MAS3587F
61 extern enum /* from mp3_playback.c */
62 {
63 MPEG_DECODER,
64 MPEG_ENCODER
65 } mpeg_mode;
66 #endif /* CONFIG_CODEC == MAS3587F */
67
68 extern char* playlist_peek(int steps);
69 extern bool playlist_check(int steps);
70 extern int playlist_next(int steps);
71 extern int playlist_amount(void);
72 extern int playlist_update_resume_info(const struct mp3entry* id3);
73
74 #define MPEG_PLAY 1
75 #define MPEG_STOP 2
76 #define MPEG_PAUSE 3
77 #define MPEG_RESUME 4
78 #define MPEG_NEXT 5
79 #define MPEG_PREV 6
80 #define MPEG_FF_REWIND 7
81 #define MPEG_FLUSH_RELOAD 8
82 #define MPEG_RECORD 9
83 #define MPEG_INIT_RECORDING 10
84 #define MPEG_INIT_PLAYBACK 11
85 #define MPEG_NEW_FILE 12
86 #define MPEG_PAUSE_RECORDING 13
87 #define MPEG_RESUME_RECORDING 14
88 #define MPEG_NEED_DATA 100
89 #define MPEG_TRACK_CHANGE 101
90 #define MPEG_SAVE_DATA 102
91 #define MPEG_STOP_DONE 103
92 #define MPEG_PRERECORDING_TICK 104
93
94 /* indicator for MPEG_NEED_DATA */
95 #define GENERATE_UNBUFFER_EVENTS 1
96
97 /* list of tracks in memory */
98 #define MAX_TRACK_ENTRIES (1<<4) /* Must be power of 2 */
99 #define MAX_TRACK_ENTRIES_MASK (MAX_TRACK_ENTRIES - 1)
100
101 struct trackdata
102 {
103 struct mp3entry id3;
104 int mempos;
105 int load_ahead_index;
106 };
107
108 static struct trackdata trackdata[MAX_TRACK_ENTRIES];
109
110 static unsigned int current_track_counter = 0;
111 static unsigned int last_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 callback */
122 static bool (*cuesheet_callback)(const char *filename) = NULL;
123
124 static const char mpeg_thread_name[] = "mpeg";
125 static unsigned int mpeg_errno;
126
127 static bool playing = false; /* We are playing an MP3 stream */
128 static bool is_playing = false; /* We are (attempting to) playing MP3 files */
129 static bool paused; /* playback is paused */
130
131 #ifdef SIMULATOR
132 static char mpeg_stack[DEFAULT_STACK_SIZE];
133 static struct mp3entry taginfo;
134
135 #else /* !SIMULATOR */
136 static struct event_queue mpeg_queue;
137 static long mpeg_stack[(DEFAULT_STACK_SIZE + 0x1000)/sizeof(long)];
138
139 static int audiobuflen;
140 static int audiobuf_write;
141 static int audiobuf_swapwrite;
142 static int audiobuf_read;
143
144 static int mpeg_file;
145
146 static bool play_pending; /* We are about to start playing */
147 static bool play_pending_track_change; /* When starting play we're starting a new file */
148 static bool filling; /* We are filling the buffer with data from disk */
149 static bool dma_underrun; /* True when the DMA has stopped because of
150 slow disk reading (read error, shaking) */
151 static bool mpeg_stop_done;
152
153 static int last_dma_tick = 0;
154 static int last_dma_chunk_size;
155
156 static long low_watermark; /* Dynamic low watermark level */
157 static long low_watermark_margin = 0; /* Extra time in seconds for watermark */
158 static long lowest_watermark_level; /* Debug value to observe the buffer
159 usage */
160 #if CONFIG_CODEC == MAS3587F
161 static char recording_filename[MAX_PATH]; /* argument to thread */
162 static char delayed_filename[MAX_PATH]; /* internal copy of above */
163
164 static char xing_buffer[MAX_XING_HEADER_SIZE];
165
166 static bool init_recording_done;
167 static bool init_playback_done;
168 static bool prerecording; /* True if prerecording is enabled */
169 static bool is_prerecording; /* True if we are prerecording */
170 static bool is_recording; /* We are recording */
171
172 static enum {
173 NOT_SAVING = 0, /* reasons to save data, sorted by importance */
174 BUFFER_FULL,
175 NEW_FILE,
176 STOP_RECORDING
177 } saving_status;
178
179 static int rec_frequency_index; /* For create_xing_header() calls */
180 static int rec_version_index; /* For create_xing_header() calls */
181
182 struct prerecord_info {
183 int mempos;
184 unsigned long framecount;
185 };
186
187 static struct prerecord_info prerecord_buffer[MPEG_MAX_PRERECORD_SECONDS];
188 static int prerecord_index; /* Current index in the prerecord buffer */
189 static int prerecording_max_seconds; /* Max number of seconds to store */
190 static int prerecord_count; /* Number of seconds in the prerecord buffer */
191 static int prerecord_timeout; /* The tick count of the next prerecord data
192 store */
193
194 unsigned long record_start_time; /* Value of current_tick when recording
195 was started */
196 unsigned long pause_start_time; /* Value of current_tick when pause was
197 started */
198 static unsigned long last_rec_time;
199 static unsigned long num_rec_bytes;
200 static unsigned long last_rec_bytes;
201 static unsigned long frame_count_start;
202 static unsigned long frame_count_end;
203 static unsigned long saved_header = 0;
204
205 /* Shadow MAS registers */
206 unsigned long shadow_encoder_control = 0;
207 #endif /* CONFIG_CODEC == MAS3587F */
208
209 #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
210 unsigned long shadow_io_control_main = 0;
211 unsigned long shadow_soft_mute = 0;
212 unsigned shadow_codec_reg0;
213 #endif /* (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */
214
215 #ifdef HAVE_RECORDING
216 static const unsigned char empty_id3_header[] =
217 {
218 'I', 'D', '3', 0x03, 0x00, 0x00,
219 0x00, 0x00, 0x1f, 0x76 /* Size is 4096 minus 10 bytes for the header */
220 };
221 #endif /* HAVE_RECORDING */
222
223
224 static int get_unplayed_space(void);
225 static int get_playable_space(void);
226 static int get_unswapped_space(void);
227 #endif /* !SIMULATOR */
228
229 #if (CONFIG_CODEC == MAS3587F) && !defined(SIMULATOR)
230 static void init_recording(void);
231 static void prepend_header(void);
232 static void update_header(void);
233 static void start_prerecording(void);
234 static void start_recording(void);
235 static void stop_recording(void);
236 static int get_unsaved_space(void);
237 static void pause_recording(void);
238 static void resume_recording(void);
239 #endif /* (CONFIG_CODEC == MAS3587F) && !defined(SIMULATOR) */
240
241
242 #ifndef SIMULATOR
243 static int num_tracks_in_memory(void)
244 {
245 return (track_write_idx - track_read_idx) & MAX_TRACK_ENTRIES_MASK;
246 }
247
248 #ifdef DEBUG_TAGS
249 static void debug_tags(void)
250 {
251 int i;
252
253 for(i = 0;i < MAX_TRACK_ENTRIES;i++)
254 {
255 DEBUGF("%d - %s\n", i, trackdata[i].id3.path);
256 }
257 DEBUGF("read: %d, write :%d\n", track_read_idx, track_write_idx);
258 DEBUGF("num_tracks_in_memory: %d\n", num_tracks_in_memory());
259 }
260 #else /* !DEBUG_TAGS */
261 #define debug_tags()
262 #endif /* !DEBUG_TAGS */
263
264 static void remove_current_tag(void)
265 {
266 if(num_tracks_in_memory() > 0)
267 {
268 /* First move the index, so nobody tries to access the tag */
269 track_read_idx = (track_read_idx+1) & MAX_TRACK_ENTRIES_MASK;
270 debug_tags();
271 }
272 else
273 {
274 DEBUGF("remove_current_tag: no tracks to remove\n");
275 }
276 }
277
278 static void remove_all_non_current_tags(void)
279 {
280 track_write_idx = (track_read_idx+1) & MAX_TRACK_ENTRIES_MASK;
281 debug_tags();
282 }
283
284 static void remove_all_tags(void)
285 {
286 track_write_idx = track_read_idx;
287
288 debug_tags();
289 }
290
291 static struct trackdata *get_trackdata(int offset)
292 {
293 if(offset >= num_tracks_in_memory())
294 return NULL;
295 else
296 return &trackdata[(track_read_idx + offset) & MAX_TRACK_ENTRIES_MASK];
297 }
298 #endif /* !SIMULATOR */
299
300 /***********************************************************************/
301 /* audio event handling */
302
303 #define MAX_EVENT_HANDLERS 10
304 struct event_handlers_table
305 {
306 AUDIO_EVENT_HANDLER handler;
307 unsigned short mask;
308 };
309 static struct event_handlers_table event_handlers[MAX_EVENT_HANDLERS];
310 static int event_handlers_count = 0;
311
312 void audio_register_event_handler(AUDIO_EVENT_HANDLER handler, unsigned short mask)
313 {
314 if (event_handlers_count < MAX_EVENT_HANDLERS)
315 {
316 event_handlers[event_handlers_count].handler = handler;
317 event_handlers[event_handlers_count].mask = mask;
318 event_handlers_count++;
319 }
320 }
321
322 /* dispatch calls each handler in the order registered and returns after some
323 handler actually handles the event (the event is assumed to no longer be valid
324 after this, due to the handler changing some condition); returns true if someone
325 handled the event, which is expected to cause the caller to skip its own handling
326 of the event */
327 #ifndef SIMULATOR
328 static bool audio_dispatch_event(unsigned short event, unsigned long data)
329 {
330 int i = 0;
331 for(i=0; i < event_handlers_count; i++)
332 {
333 if ( event_handlers[i].mask & event )
334 {
335 int rc = event_handlers[i].handler(event, data);
336 if ( rc == AUDIO_EVENT_RC_HANDLED )
337 return true;
338 }
339 }
340 return false;
341 }
342 #endif
343
344 /***********************************************************************/
345
346 static void set_elapsed(struct mp3entry* id3)
347 {
348 if ( id3->vbr ) {
349 if ( id3->has_toc ) {
350 /* calculate elapsed time using TOC */
351 int i;
352 unsigned int remainder, plen, relpos, nextpos;
353
354 /* find wich percent we're at */
355 for (i=0; i<100; i++ )
356 {
357 if ( id3->offset < id3->toc[i] * (id3->filesize / 256) )
358 {
359 break;
360 }
361 }
362
363 i--;
364 if (i < 0)
365 i = 0;
366
367 relpos = id3->toc[i];
368
369 if (i < 99)
370 {
371 nextpos = id3->toc[i+1];
372 }
373 else
374 {
375 nextpos = 256;
376 }
377
378 remainder = id3->offset - (relpos * (id3->filesize / 256));
379
380 /* set time for this percent (divide before multiply to prevent
381 overflow on long files. loss of precision is negligible on
382 short files) */
383 id3->elapsed = i * (id3->length / 100);
384
385 /* calculate remainder time */
386 plen = (nextpos - relpos) * (id3->filesize / 256);
387 id3->elapsed += (((remainder * 100) / plen) *
388 (id3->length / 10000));
389 }
390 else {
391 /* no TOC exists. set a rough estimate using average bitrate */
392 int tpk = id3->length / (id3->filesize / 1024);
393 id3->elapsed = id3->offset / 1024 * tpk;
394 }
395 }
396 else
397 /* constant bitrate, use exact calculation */
398 id3->elapsed = id3->offset / (id3->bitrate / 8);
399 }
400
401 int audio_get_file_pos(void)
402 {
403 int pos = -1;
404 struct mp3entry *id3 = audio_current_track();
405
406 if (id3->vbr)
407 {
408 if (id3->has_toc)
409 {
410 /* Use the TOC to find the new position */
411 unsigned int percent, remainder;
412 int curtoc, nexttoc, plen;
413
414 percent = (id3->elapsed*100)/id3->length;
415 if (percent > 99)
416 percent = 99;
417
418 curtoc = id3->toc[percent];
419
420 if (percent < 99)
421 nexttoc = id3->toc[percent+1];
422 else
423 nexttoc = 256;
424
425 pos = (id3->filesize/256)*curtoc;
426
427 /* Use the remainder to get a more accurate position */
428 remainder = (id3->elapsed*100)%id3->length;
429 remainder = (remainder*100)/id3->length;
430 plen = (nexttoc - curtoc)*(id3->filesize/256);
431 pos += (plen/100)*remainder;
432 }
433 else
434 {
435 /* No TOC exists, estimate the new position */
436 pos = (id3->filesize / (id3->length / 1000)) *
437 (id3->elapsed / 1000);
438 }
439 }
440 else if (id3->bitrate)
441 pos = id3->elapsed * (id3->bitrate / 8);
442 else
443 {
444 return -1;
445 }
446
447 if (pos >= (int)(id3->filesize - id3->id3v1len))
448 {
449 /* Don't seek right to the end of the file so that we can
450 transition properly to the next song */
451 pos = id3->filesize - id3->id3v1len - 1;
452 }
453 else if (pos < (int)id3->first_frame_offset)
454 {
455 /* skip past id3v2 tag and other leading garbage */
456 pos = id3->first_frame_offset;
457 }
458 return pos;
459 }
460
461 unsigned long mpeg_get_last_header(void)
462 {
463 #ifdef SIMULATOR
464 return 0;
465 #else /* !SIMULATOR */
466 unsigned long tmp[2];
467
468 /* Read the frame data from the MAS and reconstruct it with the
469 frame sync and all */
470 mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_STATUS_1, tmp, 2);
471 return 0xffe00000 | ((tmp[0] & 0x7c00) << 6) | (tmp[1] & 0xffff);
472 #endif /* !SIMULATOR */
473 }
474
475 void audio_set_cuesheet_callback(bool (*handler)(const char *filename))
476 {
477 cuesheet_callback = handler;
478 }
479
480 #ifndef SIMULATOR
481 /* Send callback events to notify about removing old tracks. */
482 static void generate_unbuffer_events(void)
483 {
484 int i;
485 int numentries = MAX_TRACK_ENTRIES - num_tracks_in_memory();
486 int cur_idx = track_write_idx;
487
488 for (i = 0; i < numentries; i++)
489 {
490 /* Send an event to notify that track has finished. */
491 send_event(PLAYBACK_EVENT_TRACK_FINISH, &trackdata[cur_idx].id3);
492 cur_idx = (cur_idx + 1) & MAX_TRACK_ENTRIES_MASK;
493 }
494 }
495
496 /* Send callback events to notify about new tracks. */
497 static void generate_postbuffer_events(void)
498 {
499 int i;
500 int numentries = num_tracks_in_memory();
501 int cur_idx = track_read_idx;
502
503 for (i = 0; i < numentries; i++)
504 {
505 send_event(PLAYBACK_EVENT_TRACK_BUFFER, &trackdata[cur_idx].id3);
506 cur_idx = (cur_idx + 1) & MAX_TRACK_ENTRIES_MASK;
507 }
508 }
509
510 static void recalculate_watermark(int bitrate)
511 {
512 int bytes_per_sec;
513 int time = ata_spinup_time;
514
515 /* A bitrate of 0 probably means empty VBR header. We play safe
516 and set a high threshold */
517 if(bitrate == 0)
518 bitrate = 320;
519
520 bytes_per_sec = bitrate * 1000 / 8;
521
522 if(time)
523 {
524 /* No drive spins up faster than 3.5s */
525 if(time < 350)
526 time = 350;
527
528 time = time * 3;
529 low_watermark = ((low_watermark_margin * HZ + time) *
530 bytes_per_sec) / HZ;
531 }
532 else
533 {
534 low_watermark = MPEG_LOW_WATER;
535 }
536 }
537
538 #ifndef HAVE_FLASH_STORAGE
539 void audio_set_buffer_margin(int seconds)
540 {
541 low_watermark_margin = seconds;
542 }
543 #endif
544
545 void audio_get_debugdata(struct audio_debug *dbgdata)
546 {
547 dbgdata->audiobuflen = audiobuflen;
548 dbgdata->audiobuf_write = audiobuf_write;
549 dbgdata->audiobuf_swapwrite = audiobuf_swapwrite;
550 dbgdata->audiobuf_read = audiobuf_read;
551
552 dbgdata->last_dma_chunk_size = last_dma_chunk_size;
553
554 #if CONFIG_CPU == SH7034
555 dbgdata->dma_on = (SCR0 & 0x80) != 0;
556 #endif
557 dbgdata->playing = playing;
558 dbgdata->play_pending = play_pending;
559 dbgdata->is_playing = is_playing;
560 dbgdata->filling = filling;
561 dbgdata->dma_underrun = dma_underrun;
562
563 dbgdata->unplayed_space = get_unplayed_space();
564 dbgdata->playable_space = get_playable_space();
565 dbgdata->unswapped_space = get_unswapped_space();
566
567 dbgdata->low_watermark_level = low_watermark;
568 dbgdata->lowest_watermark_level = lowest_watermark_level;
569 }
570
571 #ifdef DEBUG
572 static void dbg_timer_start(void)
573 {
574 /* We are using timer 2 */
575
576 TSTR &= ~0x04; /* Stop the timer */
577 TSNC &= ~0x04; /* No synchronization */
578 TMDR &= ~0x44; /* Operate normally */
579
580 TCNT2 = 0; /* Start counting at 0 */
581 TCR2 = 0x03; /* Sysclock/8 */
582
583 TSTR |= 0x04; /* Start timer 2 */
584 }
585
586 static int dbg_cnt2us(unsigned int cnt)
587 {
588 return (cnt * 10000) / (FREQ/800);
589 }
590 #endif /* DEBUG */
591
592 static int get_unplayed_space(void)
593 {
594 int space = audiobuf_write - audiobuf_read;
595 if (space < 0)
596 space += audiobuflen;
597 return space;
598 }
599
600 static int get_playable_space(void)
601 {
602 int space = audiobuf_swapwrite - audiobuf_read;
603 if (space < 0)
604 space += audiobuflen;
605 return space;
606 }
607
608 static int get_unplayed_space_current_song(void)
609 {
610 int space;
611
612 if (num_tracks_in_memory() > 1)
613 {
614 space = get_trackdata(1)->mempos - audiobuf_read;
615 }
616 else
617 {
618 space = audiobuf_write - audiobuf_read;
619 }
620
621 if (space < 0)
622 space += audiobuflen;
623
624 return space;
625 }
626
627 static int get_unswapped_space(void)
628 {
629 int space = audiobuf_write - audiobuf_swapwrite;
630 if (space < 0)
631 space += audiobuflen;
632 return space;
633 }
634
635 #if CONFIG_CODEC == MAS3587F
636 static int get_unsaved_space(void)
637 {
638 int space = audiobuf_write - audiobuf_read;
639 if (space < 0)
640 space += audiobuflen;
641 return space;
642 }
643
644 static void drain_dma_buffer(void)
645 {
646 while (PBDRH & 0x40)
647 {
648 xor_b(0x08, &PADRH);
649
650 while (PBDRH & 0x80);
651
652 xor_b(0x08, &PADRH);
653
654 while (!(PBDRH & 0x80));
655 }
656 }
657
658 #ifdef DEBUG
659 static long timing_info_index = 0;
660 static long timing_info[1024];
661 #endif /* DEBUG */
662
663 void rec_tick (void) __attribute__ ((section (".icode")));
664 void rec_tick(void)
665 {
666 int i;
667 int delay;
668 char data;
669
670 if(is_recording && (PBDRH & 0x40))
671 {
672 #ifdef DEBUG
673 timing_info[timing_info_index++] = current_tick;
674 TCNT2 = 0;
675 #endif /* DEBUG */
676 /* Note: Although this loop is run in interrupt context, further
677 * optimisation will do no good. The MAS would then deliver bad
678 * frames occasionally, as observed in extended experiments. */
679 i = 0;
680 while (PBDRH & 0x40) /* We try to read as long as EOD is high */
681 {
682 xor_b(0x08, &PADRH); /* Set PR active, independent of polarity */
683
684 delay = 100;
685 while (PBDRH & 0x80) /* Wait until /RTW becomes active */
686 {
687 if (--delay <= 0) /* Bail out if we have to wait too long */
688 { /* i.e. the MAS doesn't want to talk to us */
689 xor_b(0x08, &PADRH); /* Set PR inactive */
690 goto transfer_end; /* and get out of here */
691 }
692 }
693
694 data = *(unsigned char *)0x04000000; /* read data byte */
695
696 xor_b(0x08, &PADRH); /* Set PR inactive */
697
698 audiobuf[audiobuf_write++] = data;
699
700 if (audiobuf_write >= audiobuflen)
701 audiobuf_write = 0;
702
703 i++;
704 }
705 transfer_end:
706
707 #ifdef DEBUG
708 timing_info[timing_info_index++] = TCNT2 + (i << 16);
709 timing_info_index &= 0x3ff;
710 #endif /* DEBUG */
711
712 num_rec_bytes += i;
713
714 if(is_prerecording)
715 {
716 if(TIME_AFTER(current_tick, prerecord_timeout))
717 {
718 prerecord_timeout = current_tick + HZ;
719 queue_post(&mpeg_queue, MPEG_PRERECORDING_TICK, 0);
720 }
721 }
722 else
723 {
724 /* Signal to save the data if we are running out of buffer
725 space */
726 if (audiobuflen - get_unsaved_space() < MPEG_RECORDING_LOW_WATER
727 && saving_status == NOT_SAVING)
728 {
729 saving_status = BUFFER_FULL;
730 queue_post(&mpeg_queue, MPEG_SAVE_DATA, 0);
731 }
732 }
733 }
734 }
735 #endif /* CONFIG_CODEC == MAS3587F */
736
737 void playback_tick(void)
738 {
739 struct trackdata *ptd = get_trackdata(0);
740 if(ptd)
741 {
742 ptd->id3.elapsed += (current_tick - last_dma_tick) * 1000 / HZ;
743 last_dma_tick = current_tick;
744 audio_dispatch_event(AUDIO_EVENT_POS_REPORT,
745 (unsigned long)ptd->id3.elapsed);
746 }
747 }
748
749 static void reset_mp3_buffer(void)
750 {
751 audiobuf_read = 0;
752 audiobuf_write = 0;
753 audiobuf_swapwrite = 0;
754 lowest_watermark_level = audiobuflen;
755 }
756
757 /* DMA transfer end interrupt callback */
758 static void transfer_end(unsigned char** ppbuf, size_t* psize)
759 {
760 if(playing && !paused)
761 {
762 int unplayed_space_left;
763 int space_until_end_of_buffer;
764 int track_offset = 1;
765 struct trackdata *track;
766
767 audiobuf_read += last_dma_chunk_size;
768 if(audiobuf_read >= audiobuflen)
769 audiobuf_read = 0;
770
771 /* First, check if we are on a track boundary */
772 if (num_tracks_in_memory() > 1)
773 {
774 if (audiobuf_read == get_trackdata(track_offset)->mempos)
775 {
776 if ( ! audio_dispatch_event(AUDIO_EVENT_END_OF_TRACK, 0) )
777 {
778 queue_post(&mpeg_queue, MPEG_TRACK_CHANGE, 0);
779 track_offset++;
780 }
781 }
782 }
783
784 unplayed_space_left = get_unplayed_space();
785
786 space_until_end_of_buffer = audiobuflen - audiobuf_read;
787
788 if(!filling && unplayed_space_left < low_watermark)
789 {
790 filling = true;
791 queue_post(&mpeg_queue, MPEG_NEED_DATA, GENERATE_UNBUFFER_EVENTS);
792 }
793
794 if(unplayed_space_left)
795 {
796 last_dma_chunk_size = MIN(0x2000, unplayed_space_left);
797 last_dma_chunk_size = MIN(last_dma_chunk_size,
798 space_until_end_of_buffer);
799
800 /* several tracks loaded? */
801 track = get_trackdata(track_offset);
802 if(track)
803 {
804 /* will we move across the track boundary? */
805 if (( audiobuf_read < track->mempos ) &&
806 ((audiobuf_read+last_dma_chunk_size) >
807 track->mempos ))
808 {
809 /* Make sure that we end exactly on the boundary */
810 last_dma_chunk_size = track->mempos - audiobuf_read;
811 }
812 }
813
814 *psize = last_dma_chunk_size & 0xffff;
815 *ppbuf = audiobuf + audiobuf_read;
816 track = get_trackdata(0);
817 if(track)
818 track->id3.offset += last_dma_chunk_size;
819
820 /* Update the watermark debug level */
821 if(unplayed_space_left < lowest_watermark_level)
822 lowest_watermark_level = unplayed_space_left;
823 }
824 else
825 {
826 /* Check if the end of data is because of a hard disk error.
827 If there is an open file handle, we are still playing music.
828 If not, the last file has been loaded, and the file handle is
829 closed. */
830 if(mpeg_file >= 0)
831 {
832 /* Update the watermark debug level */
833 if(unplayed_space_left < lowest_watermark_level)
834 lowest_watermark_level = unplayed_space_left;
835
836 DEBUGF("DMA underrun.\n");
837 dma_underrun = true;
838 }
839 else
840 {
841 if ( ! audio_dispatch_event(AUDIO_EVENT_END_OF_TRACK, 0) )
842 {
843 DEBUGF("No more MP3 data. Stopping.\n");
844 queue_post(&mpeg_queue, MPEG_TRACK_CHANGE, 0);
845 playing = false;
846 }
847 }
848 *psize = 0; /* no more transfer */
849 }
850 }
851 }
852
853 static struct trackdata *add_track_to_tag_list(const char *filename)
854 {
855 struct trackdata *track;
856
857 if(num_tracks_in_memory() >= MAX_TRACK_ENTRIES)
858 {
859 DEBUGF("Tag memory is full\n");
860 return NULL;
861 }
862
863 track = &trackdata[track_write_idx];
864
865 /* grab id3 tag of new file and
866 remember where in memory it starts */
867 if(mp3info(&track->id3, filename))
868 {
869 DEBUGF("Bad mp3\n");
870 return NULL;
871 }
872 track->mempos = audiobuf_write;
873 track->id3.elapsed = 0;
874 #ifdef HAVE_LCD_BITMAP
875 if (track->id3.title)
876 lcd_getstringsize(track->id3.title, NULL, NULL);
877 if (track->id3.artist)
878 lcd_getstringsize(track->id3.artist, NULL, NULL);
879 if (track->id3.album)
880 lcd_getstringsize(track->id3.album, NULL, NULL);
881 #endif
882 if (cuesheet_callback)
883 if (cuesheet_callback(filename))
884 track->id3.cuesheet_type = 1;
885
886 track_write_idx = (track_write_idx+1) & MAX_TRACK_ENTRIES_MASK;
887 debug_tags();
888 return track;
889 }
890
891 static int new_file(int steps)
892 {
893 int max_steps = playlist_amount();
894 int start = 0;
895 int i;
896 struct trackdata *track;
897
898 /* Find out how many steps to advance. The load_ahead_index field tells
899 us how many playlist entries it had to skip to get to a valid one.
900 We add those together to find out where to start. */
901 if(steps > 0 && num_tracks_in_memory() > 1)
902 {
903 /* Begin with the song after the currently playing one */
904 i = 1;
905 while((track = get_trackdata(i++)))
906 {
907 start += track->load_ahead_index;
908 }
909 }
910
911 do {
912 char *trackname;
913
914 trackname = playlist_peek( start + steps );
915 if ( !trackname )
916 return -1;
917
918 DEBUGF("Loading %s\n", trackname);
919
920 mpeg_file = open(trackname, O_RDONLY);
921 if(mpeg_file < 0) {
922 DEBUGF("Couldn't open file: %s\n",trackname);
923 if(steps < 0)
924 steps--;
925 else
926 steps++;
927 }
928 else
929 {
930 struct trackdata *track = add_track_to_tag_list(trackname);
931
932 if(!track)
933 {
934 /* Bad mp3 file */
935 if(steps < 0)
936 steps--;
937 else
938 steps++;
939 close(mpeg_file);
940 mpeg_file = -1;
941 }
942 else
943 {
944 /* skip past id3v2 tag */
945 lseek(mpeg_file,
946 track->id3.first_frame_offset,
947 SEEK_SET);
948 track->id3.index = steps;
949 track->load_ahead_index = steps;
950 track->id3.offset = 0;
951
952 if(track->id3.vbr)
953 /* Average bitrate * 1.5 */
954 recalculate_watermark(
955 (track->id3.bitrate * 3) / 2);
956 else
957 recalculate_watermark(
958 track->id3.bitrate);
959
960 }
961 }
962
963 /* Bail out if no file could be opened */
964 if(abs(steps) > max_steps)
965 return -1;
966 } while ( mpeg_file < 0 );
967
968 return 0;
969 }
970
971 static void stop_playing(void)
972 {
973 struct trackdata *track;
974
975 /* Stop the current stream */
976 mp3_play_stop();
977 playing = false;
978 filling = false;
979
980 track = get_trackdata(0);
981 if (track != NULL)
982 prev_track_elapsed = track->id3.elapsed;
983
984 if(mpeg_file >= 0)
985 close(mpeg_file);
986 mpeg_file = -1;
987 remove_all_tags();
988 generate_unbuffer_events();
989 reset_mp3_buffer();
990 }
991
992 static void end_current_track(void) {
993 struct trackdata *track;
994
995 play_pending = false;
996 playing = false;
997 mp3_play_pause(false);
998
999 track = get_trackdata(0);
1000 if (track != NULL)
1001 prev_track_elapsed = track->id3.elapsed;
1002
1003 reset_mp3_buffer();
1004 remove_all_tags();
1005 generate_unbuffer_events();
1006
1007 if(mpeg_file >= 0)
1008 close(mpeg_file);
1009 }
1010
1011 /* Is this a really the end of playback or is a new playlist starting */
1012 static void check_playlist_end(int direction)
1013 {
1014 /* Use the largest possible step size to account for skipped tracks */
1015 int steps = playlist_amount();
1016
1017 if (direction < 0)
1018 steps = -steps;
1019
1020 if (playlist_next(steps) < 0)
1021 is_playing = false;
1022 }
1023
1024 static void update_playlist(void)
1025 {
1026 if (num_tracks_in_memory() > 0)
1027 {
1028 struct trackdata *track = get_trackdata(0);
1029 track->id3.index = playlist_next(track->id3.index);
1030 }
1031 else
1032 {
1033 /* End of playlist? */
1034 check_playlist_end(1);
1035 }
1036
1037 playlist_update_resume_info(audio_current_track());
1038 }
1039
1040 static void track_change(void)
1041 {
1042 DEBUGF("Track change\n");
1043
1044 struct trackdata *track = get_trackdata(0);
1045 prev_track_elapsed = track->id3.elapsed;
1046
1047 #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
1048 /* Reset the AVC */
1049 sound_set_avc(-1);
1050 #endif /* (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */
1051
1052 if (num_tracks_in_memory() > 0)
1053 {
1054 remove_current_tag();
1055 send_event(PLAYBACK_EVENT_TRACK_CHANGE, audio_current_track());
1056 update_playlist();
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 ata_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 #ifdef HAVE_MMC /* MMC is slow, so don't read too large chunks */
1608 amount_to_read = MIN(0x40000, amount_to_read);
1609 #elif MEM == 8
1610 amount_to_read = MIN(0x100000, amount_to_read);
1611 #endif
1612
1613 /* Read as much mpeg data as we can fit in the buffer */
1614 if(mpeg_file >= 0)
1615 {
1616 DEBUGF("R\n");
1617 t1 = current_tick;
1618 len = read(mpeg_file, audiobuf + audiobuf_write,
1619 amount_to_read);
1620 if(len > 0)
1621 {
1622 t2 = current_tick;
1623 DEBUGF("time: %d\n", t2 - t1);
1624 DEBUGF("R: %x\n", len);
1625
1626 /* Now make sure that we don't feed the MAS with ID3V1
1627 data */
1628 if (len < amount_to_read)
1629 {
1630 int i;
1631 static const unsigned char tag[] = "TAG";
1632 int taglen = 128;
1633 int tagptr = audiobuf_write + len - 128;
1634
1635 /* Really rare case: entire potential tag wasn't
1636 read in this call AND audiobuf_write < 128 */
1637 if (tagptr < 0)
1638 tagptr += audiobuflen;
1639
1640 for(i = 0;i < 3;i++)
1641 {
1642 if(tagptr >= audiobuflen)
1643 tagptr -= audiobuflen;
1644
1645 if(audiobuf[tagptr] != tag[i])
1646 {
1647 taglen = 0;
1648 break;
1649 }
1650
1651 tagptr++;
1652 }
1653
1654 if(taglen)
1655 {
1656 /* Skip id3v1 tag */
1657 DEBUGF("Skipping ID3v1 tag\n");
1658 len -= taglen;
1659
1660 /* In the very rare case when the entire tag
1661 wasn't read in this read() len will be < 0.
1662 Take care of this when changing the write
1663 pointer. */
1664 }
1665 }
1666
1667 audiobuf_write += len;
1668
1669 if (audiobuf_write < 0)
1670 audiobuf_write += audiobuflen;
1671
1672 if(audiobuf_write >= audiobuflen)
1673 {
1674 audiobuf_write = 0;
1675 DEBUGF("W\n");
1676 }
1677
1678 /* Tell ourselves that we want more data */
1679 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1680 }
1681 else
1682 {
1683 if(len < 0)
1684 {
1685 DEBUGF("MPEG read error\n");
1686 }
1687
1688 close(mpeg_file);
1689 mpeg_file = -1;
1690
1691 if(new_file(1) < 0)
1692 {
1693 /* No more data to play */
1694 DEBUGF("No more files to play\n");
1695 filling = false;
1696 }
1697 else
1698 {
1699 /* Tell ourselves that we want more data */
1700 queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
1701 }
1702 }
1703 }
1704 break;
1705
1706 case MPEG_TRACK_CHANGE:
1707 track_change();
1708 break;
1709
1710 #ifndef USB_NONE
1711 case SYS_USB_CONNECTED:
1712 is_playing = false;
1713 paused = false;
1714 stop_playing();
1715
1716 /* Tell the USB thread that we are safe */
1717 DEBUGF("mpeg_thread got SYS_USB_CONNECTED\n");
1718 usb_acknowledge(SYS_USB_CONNECTED_ACK);
1719
1720 /* Wait until the USB cable is extracted again */
1721 usb_wait_for_disconnect(&mpeg_queue);
1722 break;
1723 #endif /* !USB_NONE */
1724
1725 #if CONFIG_CODEC == MAS3587F
1726 case MPEG_INIT_RECORDING:
1727 init_recording();
1728 init_recording_done = true;
1729 break;
1730 #endif /* CONFIG_CODEC == MAS3587F */
1731
1732 case SYS_TIMEOUT:
1733 if (playing)
1734 playlist_update_resume_info(audio_current_track());
1735 break;
1736 }
1737 #if CONFIG_CODEC == MAS3587F
1738 }
1739 else
1740 {
1741 queue_wait(&mpeg_queue, &ev);
1742 switch(ev.id)
1743 {
1744 case MPEG_RECORD:
1745 if (is_prerecording)
1746 {
1747 int startpos;
1748
1749 /* Go back prerecord_count seconds in the buffer */
1750 startpos = prerecord_index - prerecord_count;
1751 if(startpos < 0)
1752 startpos += prerecording_max_seconds;
1753
1754 /* Read the position data from the prerecord buffer */
1755 frame_count_start = prerecord_buffer[startpos].framecount;
1756 startpos = prerecord_buffer[startpos].mempos;
1757
1758 DEBUGF("Start looking at address %x (%x)\n",
1759 audiobuf+startpos, startpos);
1760
1761 saved_header = mpeg_get_last_header();
1762
1763 mem_find_next_frame(startpos, &offset, 1800,
1764 saved_header);
1765
1766 audiobuf_read = startpos + offset;
1767 if(audiobuf_read >= audiobuflen)
1768 audiobuf_read -= audiobuflen;
1769
1770 DEBUGF("New audiobuf_read address: %x (%x)\n",
1771 audiobuf+audiobuf_read, audiobuf_read);
1772
1773 level = disable_irq_save();
1774 num_rec_bytes = get_unsaved_space();
1775 restore_irq(level);
1776 }
1777 else
1778 {
1779 frame_count_start = 0;
1780 num_rec_bytes = 0;
1781 audiobuf_read = MPEG_RESERVED_HEADER_SPACE;
1782 audiobuf_write = MPEG_RESERVED_HEADER_SPACE;
1783 }
1784
1785 prepend_header();
1786 DEBUGF("Recording...\n");
1787 start_recording();
1788
1789 /* Wait until at least one frame is encoded and get the
1790 frame header, for later use by the Xing header
1791 generation */
1792 sleep(HZ/5);
1793 saved_header = mpeg_get_last_header();
1794
1795 /* delayed until buffer is saved, don't open yet */
1796 strcpy(delayed_filename, recording_filename);
1797 mpeg_file = -1;
1798
1799 break;
1800
1801 case MPEG_STOP:
1802 DEBUGF("MPEG_STOP\n");
1803
1804 stop_recording();
1805
1806 /* Save the remaining data in the buffer */
1807 save_endpos = audiobuf_write;
1808 saving_status = STOP_RECORDING;
1809 queue_post(&mpeg_queue, MPEG_SAVE_DATA, 0);
1810 break;
1811
1812 case MPEG_STOP_DONE:
1813 DEBUGF("MPEG_STOP_DONE\n");
1814
1815 if (mpeg_file >= 0)
1816 close(mpeg_file);
1817 mpeg_file = -1;
1818
1819 update_header();
1820 #ifdef DEBUG1
1821 {
1822 int i;
1823 for(i = 0;i < 512;i++)
1824 {
1825 DEBUGF("%d - %d us (%d bytes)\n",
1826 timing_info[i*2],
1827 (timing_info[i*2+1] & 0xffff) *
1828 10000 / 13824,
1829 timing_info[i*2+1] >> 16);
1830 }
1831 }
1832 #endif /* DEBUG1 */
1833
1834 if (prerecording)
1835 {
1836 start_prerecording();
1837 }
1838 mpeg_stop_done = true;
1839 break;
1840
1841 case MPEG_NEW_FILE:
1842 /* Bail out when a more important save is happening */
1843 if (saving_status > NEW_FILE)
1844 break;
1845
1846 /* Make sure we have at least one complete frame
1847 in the buffer. If we haven't recorded a single
1848 frame within 200ms, the MAS is probably not recording
1849 anything, and we bail out. */
1850 amount_to_save = get_unsaved_space();
1851 if (amount_to_save < 1800)
1852 {
1853 sleep(HZ/5);
1854 amount_to_save = get_unsaved_space();
1855 }
1856
1857 mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_FRAME_COUNT,
1858 &frame_count_end, 1);
1859
1860 last_rec_time = current_tick - record_start_time;
1861 record_start_time = current_tick;
1862 if (paused)
1863 pause_start_time = record_start_time;
1864
1865 /* capture all values at one point */
1866 level = disable_irq_save();
1867 save_endpos = audiobuf_write;
1868 last_rec_bytes = num_rec_bytes;
1869 num_rec_bytes = 0;
1870 restore_irq(level);
1871
1872 if (amount_to_save >= 1800)
1873 {
1874 /* Now find a frame boundary to split at */
1875 save_endpos -= 1800;
1876 if (save_endpos < 0)
1877 save_endpos += audiobuflen;
1878
1879 rc = mem_find_next_frame(save_endpos, &offset, 1800,
1880 saved_header);
1881 if (!rc) /* No header found, save whole buffer */
1882 offset = 1800;
1883
1884 save_endpos += offset;
1885 if (save_endpos >= audiobuflen)
1886 save_endpos -= audiobuflen;
1887
1888 last_rec_bytes += offset - 1800;
1889 level = disable_irq_save();
1890 num_rec_bytes += 1800 - offset;
1891 restore_irq(level);
1892 }
1893
1894 saving_status = NEW_FILE;
1895 queue_post(&mpeg_queue, MPEG_SAVE_DATA, 0);
1896 break;
1897
1898 case MPEG_SAVE_DATA:
1899 if (saving_status == BUFFER_FULL)
1900 save_endpos = audiobuf_write;
1901
1902 if (mpeg_file < 0) /* delayed file open */
1903 {
1904 mpeg_file = open(delayed_filename, O_WRONLY|O_CREAT);
1905
1906 if (mpeg_file < 0)
1907 panicf("recfile: %d", mpeg_file);
1908 }
1909
1910 amount_to_save = save_endpos - audiobuf_read;
1911 if (amount_to_save < 0)
1912 amount_to_save += audiobuflen;
1913
1914 amount_to_save = MIN(amount_to_save,
1915 audiobuflen - audiobuf_read);
1916 #ifdef HAVE_MMC /* MMC is slow, so don't save too large chunks at once */
1917 amount_to_save = MIN(0x40000, amount_to_save);
1918 #elif MEM == 8
1919 amount_to_save = MIN(0x100000, amount_to_save);
1920 #endif
1921 rc = write(mpeg_file, audiobuf + audiobuf_read,
1922 amount_to_save);
1923 if (rc < 0)
1924 {
1925 if (errno == ENOSPC)
1926 {
1927 mpeg_errno = AUDIOERR_DISK_FULL;
1928 stop_recording();
1929 queue_post(&mpeg_queue, MPEG_STOP_DONE, 0);
1930 /* will close the file */
1931 break;
1932 }
1933 else
1934 panicf("rec wrt: %d", rc);
1935 }
1936
1937 audiobuf_read += amount_to_save;
1938 if (audiobuf_read >= audiobuflen)
1939 audiobuf_read = 0;
1940
1941 if (audiobuf_read == save_endpos) /* all saved */
1942 {
1943 switch (saving_status)
1944 {
1945 case BUFFER_FULL:
1946 rc = fsync(mpeg_file);
1947 if (rc < 0)
1948 panicf("rec fls: %d", rc);
1949 ata_sleep();
1950 break;
1951
1952 case NEW_FILE:
1953 /* Close the current file */
1954 rc = close(mpeg_file);
1955 if (rc < 0)
1956 panicf("rec cls: %d", rc);
1957 mpeg_file = -1;
1958 update_header();
1959 ata_sleep();
1960
1961 /* copy new filename */
1962 strcpy(delayed_filename, recording_filename);
1963 prepend_header();
1964 frame_count_start = frame_count_end;
1965 break;
1966
1967 case STOP_RECORDING:
1968 queue_post(&mpeg_queue, MPEG_STOP_DONE, 0);
1969 /* will close the file */
1970 break;
1971
1972 default:
1973 break;
1974 }
1975 saving_status = NOT_SAVING;
1976 }
1977 else /* tell ourselves to save the next chunk */
1978 queue_post(&mpeg_queue, MPEG_SAVE_DATA, 0);
1979
1980 break;
1981
1982 case MPEG_PRERECORDING_TICK:
1983 if(!is_prerecording)
1984 break;
1985
1986 /* Store the write pointer every second */
1987 prerecord_buffer[prerecord_index].mempos = audiobuf_write;
1988 mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_FRAME_COUNT,
1989 &prerecord_buffer[prerecord_index].framecount, 1);
1990
1991 /* Wrap if necessary */
1992 if(++prerecord_index == prerecording_max_seconds)
1993 prerecord_index = 0;
1994
1995 /* Update the number of seconds recorded */
1996 if(prerecord_count < prerecording_max_seconds)
1997 prerecord_count++;
1998 break;
1999
2000 case MPEG_INIT_PLAYBACK:
2001 /* Stop the prerecording */
2002 stop_recording();
2003 reset_mp3_buffer();
2004 mp3_play_init();
2005 init_playback_done = true;
2006 break;
2007
2008 case MPEG_PAUSE_RECORDING:
2009 pause_recording();
2010 break;
2011
2012 case MPEG_RESUME_RECORDING:
2013 resume_recording();
2014 break;
2015
2016 case SYS_USB_CONNECTED:
2017 /* We can safely go to USB mode if no recording
2018 is taking place */
2019 if((!is_recording || is_prerecording) && mpeg_stop_done)
2020 {
2021 /* Even if we aren't recording, we still call this
2022 function, to put the MAS in monitoring mode,
2023 to save power. */
2024 stop_recording();
2025
2026 /* Tell the USB thread that we are safe */
2027 DEBUGF("mpeg_thread got SYS_USB_CONNECTED\n");
2028 usb_acknowledge(SYS_USB_CONNECTED_ACK);
2029
2030 /* Wait until the USB cable is extracted again */
2031 usb_wait_for_disconnect(&mpeg_queue);
2032 }
2033 break;
2034 }
2035 }
2036 #endif /* CONFIG_CODEC == MAS3587F */
2037 }
2038 }
2039 #endif /* !SIMULATOR */
2040
2041 struct mp3entry* audio_current_track()
2042 {
2043 #ifdef SIMULATOR
2044 return &taginfo;
2045 #else /* !SIMULATOR */
2046 if(num_tracks_in_memory())
2047 return &get_trackdata(0)->id3;
2048 else
2049 return NULL;
2050 #endif /* !SIMULATOR */
2051 }
2052
2053 struct mp3entry* audio_next_track()
2054 {
2055 #ifdef SIMULATOR
2056 return &taginfo;
2057 #else /* !SIMULATOR */
2058 if(num_tracks_in_memory() > 1)
2059 return &get_trackdata(1)->id3;
2060 else
2061 return NULL;
2062 #endif /* !SIMULATOR */
2063 }
2064
2065 bool audio_has_changed_track(void)
2066 {
2067 if(last_track_counter != current_track_counter)
2068 {
2069 last_track_counter = current_track_counter;
2070 return true;
2071 }
2072 return false;
2073 }
2074
2075 #if CONFIG_CODEC == MAS3587F
2076 #ifndef SIMULATOR
2077 void audio_init_playback(void)
2078 {
2079 init_playback_done = false;
2080 queue_post(&mpeg_queue, MPEG_INIT_PLAYBACK, 0);
2081
2082 while(!init_playback_done)
2083 sleep(1);
2084 }
2085
2086
2087 /****************************************************************************
2088 * Recording functions
2089 ***************************************************************************/
2090 void audio_init_recording(unsigned int buffer_offset)
2091 {
2092 buffer_offset = buffer_offset;
2093 init_recording_done = false;
2094 queue_post(&mpeg_queue, MPEG_INIT_RECORDING, 0);
2095
2096 while(!init_recording_done)
2097 sleep(1);
2098 }
2099
2100 static void init_recording(void)
2101 {
2102 unsigned long val;
2103 int rc;
2104
2105 /* Disable IRQ6 */
2106 IPRB &= 0xff0f;
2107
2108 stop_playing();
2109 is_playing = false;
2110 paused = false;
2111
2112 /* Init the recording variables */
2113 is_recording = false;
2114 is_prerecording = false;
2115
2116 mpeg_stop_done = true;
2117
2118 mas_reset();
2119
2120 /* Enable the audio CODEC and the DSP core, max analog voltage range */
2121 rc = mas_direct_config_write(MAS_CONTROL, 0x8c00);
2122 if(rc < 0)
2123 panicf("mas_ctrl_w: %d", rc);
2124
2125 /* Stop the current application */
2126 val = 0;
2127 mas_writemem(MAS_BANK_D0, MAS_D0_APP_SELECT, &val, 1);
2128 do
2129 {
2130 mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1);
2131 } while(val);
2132
2133 /* Perform black magic as described by the data sheet */
2134 if((mas_version_code & 0x0fff) == 0x0102)
2135 {
2136 DEBUGF("Performing MAS black magic for B2 version\n");
2137 mas_writereg(0xa3, 0x98);
2138 mas_writereg(0x94, 0xfffff);
2139 val = 0;
2140 mas_writemem(MAS_BANK_D1, 0, &val, 1);
2141 mas_writereg(0xa3, 0x90);
2142 }
2143
2144 /* Enable A/D Converters */
2145 shadow_codec_reg0 = 0xcccd;
2146 mas_codec_writereg(0x0, shadow_codec_reg0);
2147
2148 /* Copy left channel to right (mono mode) */
2149 mas_codec_writereg(8, 0x8000);
2150
2151 /* ADC scale 0%, DSP scale 100%
2152 We use the DSP output for monitoring, because it works with all
2153 sources including S/PDIF */
2154 mas_codec_writereg(6, 0x0000);
2155 mas_codec_writereg(7, 0x4000);
2156
2157 /* No mute */
2158 shadow_soft_mute = 0;
2159 mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &shadow_soft_mute, 1);
2160
2161 #ifdef HAVE_SPDIF_OUT
2162 val = 0x09; /* Disable SDO and SDI, low impedance S/PDIF outputs */
2163 #else
2164 val = 0x2d; /* Disable SDO and SDI, disable S/PDIF output */
2165 #endif
2166 mas_writemem(MAS_BANK_D0, MAS_D0_INTERFACE_CONTROL, &val, 1);
2167
2168 /* Set Demand mode, monitoring OFF and validate all settings */
2169 shadow_io_control_main = 0x125;
2170 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2171
2172 /* Start the encoder application */
2173 val = 0x40;
2174 mas_writemem(MAS_BANK_D0, MAS_D0_APP_SELECT, &val, 1);
2175 do
2176 {
2177 mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1);
2178 } while(!(val & 0x40));
2179
2180 /* We have started the recording application with monitoring OFF.
2181 This is because we want to record at least one frame to fill the DMA
2182 buffer, because the silly MAS will not negate EOD until at least one
2183 DMA transfer has taken place.
2184 Now let's wait for some data to be encoded. */
2185 sleep(HZ/5);
2186
2187 /* Now set it to Monitoring mode as default, saves power */
2188 shadow_io_control_main = 0x525;
2189 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2190
2191 /* Wait until the DSP has accepted the settings */
2192 do
2193 {
2194 mas_readmem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &val,1);
2195 } while(val & 1);
2196
2197 drain_dma_buffer();
2198 mpeg_mode = MPEG_ENCODER;
2199
2200 DEBUGF("MAS Recording application started\n");
2201
2202 /* At this point, all settings are the reset MAS defaults, next thing is to
2203 call mpeg_set_recording_options(). */
2204 }
2205
2206 void audio_record(const char *filename)
2207 {
2208 mpeg_errno = 0;
2209
2210 strncpy(recording_filename, filename, MAX_PATH - 1);
2211 recording_filename[MAX_PATH - 1] = 0;
2212
2213 queue_post(&mpeg_queue, MPEG_RECORD, 0);
2214 }
2215
2216 void audio_pause_recording(void)
2217 {
2218 queue_post(&mpeg_queue, MPEG_PAUSE_RECORDING, 0);
2219 }
2220
2221 void audio_resume_recording(void)
2222 {
2223 queue_post(&mpeg_queue, MPEG_RESUME_RECORDING, 0);
2224 }
2225
2226 static void prepend_header(void)
2227 {
2228 int startpos;
2229 unsigned i;
2230
2231 /* Make room for header */
2232 audiobuf_read -= MPEG_RESERVED_HEADER_SPACE;
2233 if(audiobuf_read < 0)
2234 {
2235 /* Clear the bottom half */
2236 memset(audiobuf, 0, audiobuf_read + MPEG_RESERVED_HEADER_SPACE);
2237
2238 /* And the top half */
2239 audiobuf_read += audiobuflen;
2240 memset(audiobuf + audiobuf_read, 0, audiobuflen - audiobuf_read);
2241 }
2242 else
2243 {
2244 memset(audiobuf + audiobuf_read, 0, MPEG_RESERVED_HEADER_SPACE);
2245 }
2246 /* Copy the empty ID3 header */
2247 startpos = audiobuf_read;
2248 for(i = 0; i < sizeof(empty_id3_header); i++)
2249 {
2250 audiobuf[startpos++] = empty_id3_header[i];
2251 if(startpos == audiobuflen)
2252 startpos = 0;
2253 }
2254 }
2255
2256 static void update_header(void)
2257 {
2258 int fd, framelen;
2259 unsigned long frames;
2260
2261 if (last_rec_bytes > 0)
2262 {
2263 /* Create the Xing header */
2264 fd = open(delayed_filename, O_RDWR);
2265 if (fd < 0)
2266 panicf("rec upd: %d (%s)", fd, recording_filename);
2267
2268 frames = frame_count_end - frame_count_start;
2269 /* If the number of recorded frames has reached 0x7ffff,
2270 we can no longer trust it */
2271 if (frame_count_end == 0x7ffff)
2272 frames = 0;
2273
2274 /* saved_header is saved right before stopping the MAS */
2275 framelen = create_xing_header(fd, 0, last_rec_bytes, xing_buffer,
2276 frames, last_rec_time * (1000/HZ),
2277 saved_header, NULL, false);
2278
2279 lseek(fd, MPEG_RESERVED_HEADER_SPACE - framelen, SEEK_SET);
2280 write(fd, xing_buffer, framelen);
2281 close(fd);
2282 }
2283 }
2284
2285 static void start_prerecording(void)
2286 {
2287 unsigned long val;
2288
2289 DEBUGF("Starting prerecording\n");
2290
2291 prerecord_index = 0;
2292 prerecord_count = 0;
2293 prerecord_timeout = current_tick + HZ;
2294 memset(prerecord_buffer, 0, sizeof(prerecord_buffer));
2295 reset_mp3_buffer();
2296
2297 is_prerecording = true;
2298
2299 /* Stop monitoring and start the encoder */
2300 shadow_io_control_main &= ~(1 << 10);
2301 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2302 DEBUGF("mas_writemem(MAS_BANK_D0, IO_CONTROL_MAIN, %x)\n", shadow_io_control_main);
2303
2304 /* Wait until the DSP has accepted the settings */
2305 do
2306 {
2307 mas_readmem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &val,1);
2308 } while(val & 1);
2309
2310 is_recording = true;
2311 saving_status = NOT_SAVING;
2312
2313 demand_irq_enable(true);
2314 }
2315
2316 static void start_recording(void)
2317 {
2318 unsigned long val;
2319
2320 if(is_prerecording)
2321 {
2322 /* This will make the IRQ handler start recording
2323 for real, i.e send MPEG_SAVE_DATA messages when
2324 the buffer is full */
2325 is_prerecording = false;
2326 }
2327 else
2328 {
2329 /* If prerecording is off, we need to stop the monitoring
2330 and start the encoder */
2331 shadow_io_control_main &= ~(1 << 10);
2332 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2333 DEBUGF("mas_writemem(MAS_BANK_D0, IO_CONTROL_MAIN, %x)\n", shadow_io_control_main);
2334
2335 /* Wait until the DSP has accepted the settings */
2336 do
2337 {
2338 mas_readmem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &val,1);
2339 } while(val & 1);
2340 }
2341
2342 is_recording = true;
2343 saving_status = NOT_SAVING;
2344 paused = false;
2345
2346 /* Store the current time */
2347 if(prerecording)
2348 record_start_time = current_tick - prerecord_count * HZ;
2349 else
2350 record_start_time = current_tick;
2351
2352 pause_start_time = 0;
2353
2354 demand_irq_enable(true);
2355 }
2356
2357 static void pause_recording(void)
2358 {
2359 pause_start_time = current_tick;
2360
2361 /* Set the pause bit */
2362 shadow_soft_mute |= 2;
2363 mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &shadow_soft_mute, 1);
2364
2365 paused = true;
2366 }
2367
2368 static void resume_recording(void)
2369 {
2370 paused = false;
2371
2372 /* Clear the pause bit */
2373 shadow_soft_mute &= ~2;
2374 mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &shadow_soft_mute, 1);
2375
2376 /* Compensate for the time we have been paused */
2377 if(pause_start_time)
2378 {
2379 record_start_time =
2380 current_tick - (pause_start_time - record_start_time);
2381 pause_start_time = 0;
2382 }
2383 }
2384
2385 static void stop_recording(void)
2386 {
2387 unsigned long val;
2388
2389 /* Let it finish the last frame */
2390 if(!paused)
2391 pause_recording();
2392 sleep(HZ/5);
2393
2394 demand_irq_enable(false);
2395
2396 is_recording = false;
2397 is_prerecording = false;
2398
2399 last_rec_bytes = num_rec_bytes;
2400 mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_FRAME_COUNT, &frame_count_end, 1);
2401 last_rec_time = current_tick - record_start_time;
2402
2403 /* Start monitoring */
2404 shadow_io_control_main |= (1 << 10);
2405 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1);
2406 DEBUGF("mas_writemem(MAS_BANK_D0, IO_CONTROL_MAIN, %x)\n", shadow_io_control_main);
2407
2408 /* Wait until the DSP has accepted the settings */
2409 do
2410 {
2411 mas_readmem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &val,1);
2412 } while(val & 1);
2413
2414 resume_recording();
2415 }
2416
2417 void audio_set_recording_options(struct audio_recording_options *options)
2418 {
2419 bool is_mpeg1;
2420
2421 is_mpeg1 = (options->rec_frequency < 3)?true:false;
2422
2423 rec_version_index = is_mpeg1?3:2;
2424 rec_frequency_index = options->rec_frequency % 3;
2425
2426 shadow_encoder_control = (options->rec_quality << 17) |
2427 (rec_frequency_index << 10) |
2428 ((is_mpeg1?1:0) << 9) |
2429 (((options->rec_channels * 2 + 1) & 3) << 6) |
2430 (1 << 5) /* MS-stereo */ |
2431 (1 << 2) /* Is an original */;
2432 mas_writemem(MAS_BANK_D0, MAS_D0_ENCODER_CONTROL, &shadow_encoder_control,1);
2433
2434 DEBUGF("mas_writemem(MAS_BANK_D0, ENCODER_CONTROL, %x)\n", shadow_encoder_control);
2435
2436 shadow_soft_mute = options->rec_editable?4:0;
2437 mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &shadow_soft_mute,1);
2438
2439 DEBUGF("mas_writemem(MAS_BANK_D0, SOFT_MUTE, %x)\n", shadow_soft_mute);
2440
2441 shadow_io_control_main = ((1 << 10) | /* Monitoring ON */
2442 ((options->rec_source < 2)?1:2) << 8) | /* Input select */
2443 (1 << 5) | /* SDO strobe invert */
2444 ((is_mpeg1?0:1) << 3) |
2445 (1 << 2) | /* Inverted SIBC clock signal */
2446 1; /* Validate */
2447 mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main,1);
2448
2449 DEBUGF("mas_writemem(MAS_BANK_D0, IO_CONTROL_MAIN, %x)\n", shadow_io_control_main);
2450
2451 if(options->rec_source == AUDIO_SRC_MIC)
2452 {
2453 /* Copy left channel to right (mono mode) */
2454 mas_codec_writereg(8, 0x8000);
2455 }
2456 else
2457 {
2458 /* Stereo input mode */
2459 mas_codec_writereg(8, 0);
2460 }
2461
2462 prerecording_max_seconds = options->rec_prerecord_time;
2463 if(prerecording_max_seconds)
2464 {
2465 prerecording = true;
2466 start_prerecording();
2467 }
2468 else
2469 {
2470 prerecording = false;
2471 is_prerecording = false;
2472 is_recording = false;
2473 }
2474 }
2475
2476 /* If use_mic is true, the left gain is used */
2477 void audio_set_recording_gain(int left, int right, int type)
2478 {
2479 /* Enable both left and right A/D */
2480 shadow_codec_reg0 = (left << 12) |
2481 (right << 8) |
2482 (left << 4) |
2483 (type==AUDIO_GAIN_MIC?0x0008:0) | /* Connect left A/D to mic */
2484 0x0007;
2485 mas_codec_writereg(0x0, shadow_codec_reg0);
2486 }
2487
2488 #if CONFIG_TUNER & S1A0903X01
2489 /* Get the (unpitched) MAS PLL frequency, for avoiding FM interference with the
2490 * Samsung tuner. Zero means unknown. Currently handles recording from analog
2491 * input only. */
2492 int mpeg_get_mas_pllfreq(void)
2493 {
2494 if (mpeg_mode != MPEG_ENCODER)
2495 return 0;
2496
2497 if (rec_frequency_index == 0) /* 44.1 kHz / 22.05 kHz */
2498 return 22579000;
2499 else
2500 return 24576000;
2501 }
2502 #endif /* CONFIG_TUNER & S1A0903X01 */
2503
2504 /* try to make some kind of beep, also in recording mode */
2505 void audio_beep(int duration)
2506 {
2507 long starttick = current_tick;
2508 do
2509 { /* toggle bit 0 of codec register 0, toggling the DAC off & on.
2510 * While this is still audible even without an external signal,
2511 * it doesn't affect the (pre-)recording. */
2512 mas_codec_writereg(0, shadow_codec_reg0 ^ 1);
2513 mas_codec_writereg(0, shadow_codec_reg0);
2514 yield();
2515 }
2516 while (current_tick - starttick < duration);
2517 }
2518
2519 void audio_new_file(const char *filename)
2520 {
2521 mpeg_errno = 0;
2522
2523 strncpy(recording_filename, filename, MAX_PATH - 1);
2524 recording_filename[MAX_PATH - 1] = 0;
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
2848 #ifndef SIMULATOR
2849 audiobuflen = audiobufend - audiobuf;
2850 queue_init(&mpeg_queue, true);
2851 #endif /* !SIMULATOR */
2852 create_thread(mpeg_thread, mpeg_stack,
2853 sizeof(mpeg_stack), 0, mpeg_thread_name
2854 IF_PRIO(, PRIORITY_SYSTEM)
2855 IF_COP(, CPU));
2856
2857 memset(trackdata, sizeof(trackdata), 0);
2858
2859 #if (CONFIG_CODEC == MAS3587F) && !defined(SIMULATOR)
2860 if (HW_MASK & PR_ACTIVE_HIGH)
2861 and_b(~0x08, &PADRH);
2862 else
2863 or_b(0x08, &PADRH);
2864 #endif /* CONFIG_CODEC == MAS3587F */
2865
2866 #ifdef DEBUG
2867 dbg_timer_start();
2868 dbg_cnt2us(0);
2869 #endif /* DEBUG */
2870 }
2871
2872 #endif /* CONFIG_CODEC != SWCODEC */
Open Source Jukebox Firmware