diff options
Diffstat (limited to 'firmware/target/sh/archos/audio-archos.c')
-rw-r--r-- | firmware/target/sh/archos/audio-archos.c | 543 |
1 files changed, 0 insertions, 543 deletions
diff --git a/firmware/target/sh/archos/audio-archos.c b/firmware/target/sh/archos/audio-archos.c deleted file mode 100644 index 2c2579bec5..0000000000 --- a/firmware/target/sh/archos/audio-archos.c +++ /dev/null | |||
@@ -1,543 +0,0 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Code that has been in mpeg.c before, now creating an encapsulated play | ||
11 | * data module, to be used by other sources than file playback as well. | ||
12 | * | ||
13 | * Copyright (C) 2004 by Linus Nielsen Feltzing | ||
14 | * | ||
15 | * This program is free software; you can redistribute it and/or | ||
16 | * modify it under the terms of the GNU General Public License | ||
17 | * as published by the Free Software Foundation; either version 2 | ||
18 | * of the License, or (at your option) any later version. | ||
19 | * | ||
20 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
21 | * KIND, either express or implied. | ||
22 | * | ||
23 | ****************************************************************************/ | ||
24 | #include <stdbool.h> | ||
25 | #include "config.h" | ||
26 | #include "debug.h" | ||
27 | #include "panic.h" | ||
28 | #include <kernel.h> | ||
29 | #include "mp3_playback.h" | ||
30 | #include "sound.h" | ||
31 | #include "i2c.h" | ||
32 | #include "system.h" | ||
33 | #include "audiohw.h" | ||
34 | |||
35 | /* hacking into mpeg.c, recording is still there */ | ||
36 | #if CONFIG_CODEC == MAS3587F | ||
37 | enum | ||
38 | { | ||
39 | MPEG_DECODER, | ||
40 | MPEG_ENCODER | ||
41 | } mpeg_mode; | ||
42 | #endif /* #ifdef MAS3587F */ | ||
43 | |||
44 | #if ((CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)) && !defined(SIMULATOR) | ||
45 | extern unsigned long shadow_io_control_main; | ||
46 | extern unsigned shadow_codec_reg0; | ||
47 | #endif | ||
48 | |||
49 | /**** globals ****/ | ||
50 | |||
51 | /* own version, independent of mpeg.c */ | ||
52 | static bool paused; /* playback is paused */ | ||
53 | static bool playing; /* We are playing an MP3 stream */ | ||
54 | |||
55 | /* the registered callback function to ask for more mp3 data */ | ||
56 | static mp3_play_callback_t callback_for_more; | ||
57 | |||
58 | /* list of tracks in memory */ | ||
59 | #define MAX_ID3_TAGS (1<<4) /* Must be power of 2 */ | ||
60 | #define MAX_ID3_TAGS_MASK (MAX_ID3_TAGS - 1) | ||
61 | |||
62 | bool audio_is_initialized = false; | ||
63 | |||
64 | /* FIX: this code pretty much assumes a MAS */ | ||
65 | |||
66 | /* dirty calls to mpeg.c */ | ||
67 | extern void playback_tick(void); | ||
68 | extern void rec_tick(void); | ||
69 | |||
70 | unsigned long mas_version_code; | ||
71 | |||
72 | #if CONFIG_CODEC == MAS3507D | ||
73 | static void mas_poll_start(void) | ||
74 | { | ||
75 | unsigned int count; | ||
76 | |||
77 | count = 9 * FREQ / 10000 / 8; /* 0.9 ms */ | ||
78 | |||
79 | /* We are using timer 1 */ | ||
80 | |||
81 | TSTR &= ~0x02; /* Stop the timer */ | ||
82 | TSNC &= ~0x02; /* No synchronization */ | ||
83 | TMDR &= ~0x02; /* Operate normally */ | ||
84 | |||
85 | TCNT1 = 0; /* Start counting at 0 */ | ||
86 | GRA1 = count; | ||
87 | TCR1 = 0x23; /* Clear at GRA match, sysclock/8 */ | ||
88 | |||
89 | /* Enable interrupt on level 5 */ | ||
90 | IPRC = (IPRC & ~0x000f) | 0x0005; | ||
91 | |||
92 | TSR1 &= ~0x02; | ||
93 | TIER1 = 0xf9; /* Enable GRA match interrupt */ | ||
94 | |||
95 | TSTR |= 0x02; /* Start timer 1 */ | ||
96 | } | ||
97 | #elif CONFIG_CODEC != SWCODEC | ||
98 | static void postpone_dma_tick(void) | ||
99 | { | ||
100 | unsigned int count; | ||
101 | |||
102 | count = 8 * FREQ / 10000 / 8; /* 0.8 ms */ | ||
103 | |||
104 | /* We are using timer 1 */ | ||
105 | |||
106 | TSTR &= ~0x02; /* Stop the timer */ | ||
107 | TSNC &= ~0x02; /* No synchronization */ | ||
108 | TMDR &= ~0x02; /* Operate normally */ | ||
109 | |||
110 | TCNT1 = 0; /* Start counting at 0 */ | ||
111 | GRA1 = count; | ||
112 | TCR1 = 0x23; /* Clear at GRA match, sysclock/8 */ | ||
113 | |||
114 | /* Enable interrupt on level 5 */ | ||
115 | IPRC = (IPRC & ~0x000f) | 0x0005; | ||
116 | |||
117 | TSR1 &= ~0x02; | ||
118 | TIER1 = 0xf9; /* Enable GRA match interrupt */ | ||
119 | |||
120 | TSTR |= 0x02; /* Start timer 1 */ | ||
121 | } | ||
122 | #endif | ||
123 | |||
124 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
125 | void demand_irq_enable(bool on) | ||
126 | { | ||
127 | int oldlevel = disable_irq_save(); | ||
128 | |||
129 | if(on) | ||
130 | { | ||
131 | IPRA = (IPRA & 0xfff0) | 0x000b; | ||
132 | ICR &= ~0x0010; /* IRQ3 level sensitive */ | ||
133 | } | ||
134 | else | ||
135 | IPRA &= 0xfff0; | ||
136 | |||
137 | restore_irq(oldlevel); | ||
138 | } | ||
139 | #endif /* #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */ | ||
140 | |||
141 | |||
142 | static void play_tick(void) | ||
143 | { | ||
144 | if(playing && !paused) | ||
145 | { | ||
146 | /* Start DMA if it is disabled and the DEMAND pin is high */ | ||
147 | if(!(SCR0 & 0x80) && (PBDR & 0x4000)) | ||
148 | { | ||
149 | SCR0 |= 0x80; | ||
150 | } | ||
151 | |||
152 | playback_tick(); /* dirty call to mpeg.c */ | ||
153 | } | ||
154 | } | ||
155 | |||
156 | void DEI3(void) __attribute__((interrupt_handler)); | ||
157 | void DEI3(void) | ||
158 | { | ||
159 | const void* start; | ||
160 | size_t size = 0; | ||
161 | |||
162 | if (callback_for_more != NULL) | ||
163 | { | ||
164 | callback_for_more(&start, &size); | ||
165 | } | ||
166 | |||
167 | if (size > 0) | ||
168 | { | ||
169 | DTCR3 = size & 0xffff; | ||
170 | SAR3 = (unsigned int) start; | ||
171 | } | ||
172 | else | ||
173 | { | ||
174 | CHCR3 &= ~0x0001; /* Disable the DMA interrupt */ | ||
175 | } | ||
176 | |||
177 | CHCR3 &= ~0x0002; /* Clear DMA interrupt */ | ||
178 | } | ||
179 | |||
180 | void IMIA1(void) __attribute__((interrupt_handler)); | ||
181 | void IMIA1(void) /* Timer 1 interrupt */ | ||
182 | { | ||
183 | if(playing) | ||
184 | play_tick(); | ||
185 | TSR1 &= ~0x01; | ||
186 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
187 | /* Disable interrupt */ | ||
188 | IPRC &= ~0x000f; | ||
189 | #endif | ||
190 | } | ||
191 | |||
192 | void IRQ6(void) __attribute__((interrupt_handler)); | ||
193 | void IRQ6(void) /* PB14: MAS stop demand IRQ */ | ||
194 | { | ||
195 | SCR0 &= ~0x80; | ||
196 | } | ||
197 | |||
198 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
199 | void IRQ3(void) __attribute__((interrupt_handler)); | ||
200 | void IRQ3(void) /* PA15: MAS demand IRQ */ | ||
201 | { | ||
202 | /* Begin with setting the IRQ to edge sensitive */ | ||
203 | ICR |= 0x0010; | ||
204 | |||
205 | #if CONFIG_CODEC == MAS3587F | ||
206 | if(mpeg_mode == MPEG_ENCODER) | ||
207 | rec_tick(); | ||
208 | else | ||
209 | #endif | ||
210 | postpone_dma_tick(); | ||
211 | |||
212 | /* Workaround for sh-elf-gcc 3.3.x bug with -O2 or -Os and ISRs | ||
213 | * (invalid cross-jump optimisation) */ | ||
214 | asm volatile (""); | ||
215 | } | ||
216 | #endif /* #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */ | ||
217 | |||
218 | static void setup_sci0(void) | ||
219 | { | ||
220 | /* PB15 is I/O, PB14 is IRQ6, PB12 is SCK0, PB9 is TxD0 */ | ||
221 | PBCR1 = (PBCR1 & 0x0cff) | 0x1208; | ||
222 | |||
223 | /* Set PB12 to output */ | ||
224 | or_b(0x10, &PBIORH); | ||
225 | |||
226 | /* Disable serial port */ | ||
227 | SCR0 = 0x00; | ||
228 | |||
229 | /* Synchronous, no prescale */ | ||
230 | SMR0 = 0x80; | ||
231 | |||
232 | /* Set baudrate 1Mbit/s */ | ||
233 | BRR0 = 0x02; | ||
234 | |||
235 | /* use SCK as serial clock output */ | ||
236 | SCR0 = 0x01; | ||
237 | |||
238 | /* Clear FER and PER */ | ||
239 | SSR0 &= 0xe7; | ||
240 | |||
241 | /* Set interrupt ITU2 and SCI0 priority to 0 */ | ||
242 | IPRD &= 0x0ff0; | ||
243 | |||
244 | /* set PB15 and PB14 to inputs */ | ||
245 | and_b(~0x80, &PBIORH); | ||
246 | and_b(~0x40, &PBIORH); | ||
247 | |||
248 | /* Enable End of DMA interrupt at prio 8 */ | ||
249 | IPRC = (IPRC & 0xf0ff) | 0x0800; | ||
250 | |||
251 | /* Enable Tx (only!) */ | ||
252 | SCR0 |= 0x20; | ||
253 | } | ||
254 | |||
255 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
256 | static void init_playback(void) | ||
257 | { | ||
258 | unsigned long val; | ||
259 | int rc; | ||
260 | |||
261 | mp3_play_pause(false); | ||
262 | |||
263 | mas_reset(); | ||
264 | |||
265 | /* Enable the audio CODEC and the DSP core, max analog voltage range */ | ||
266 | rc = mas_direct_config_write(MAS_CONTROL, 0x8c00); | ||
267 | if(rc < 0) | ||
268 | panicf("mas_ctrl_w: %d", rc); | ||
269 | |||
270 | /* Stop the current application */ | ||
271 | val = 0; | ||
272 | mas_writemem(MAS_BANK_D0, MAS_D0_APP_SELECT, &val, 1); | ||
273 | do | ||
274 | { | ||
275 | mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1); | ||
276 | } while(val); | ||
277 | |||
278 | /* Enable the D/A Converter */ | ||
279 | shadow_codec_reg0 = 0x0001; | ||
280 | mas_codec_writereg(0x0, shadow_codec_reg0); | ||
281 | |||
282 | /* ADC scale 0%, DSP scale 100% */ | ||
283 | mas_codec_writereg(6, 0x0000); | ||
284 | mas_codec_writereg(7, 0x4000); | ||
285 | |||
286 | #ifdef HAVE_SPDIF_OUT | ||
287 | val = 0x09; /* Disable SDO and SDI, low impedance S/PDIF outputs */ | ||
288 | #else | ||
289 | val = 0x2d; /* Disable SDO and SDI, disable S/PDIF output */ | ||
290 | #endif | ||
291 | mas_writemem(MAS_BANK_D0, MAS_D0_INTERFACE_CONTROL, &val, 1); | ||
292 | |||
293 | /* Set Demand mode and validate all settings */ | ||
294 | shadow_io_control_main = 0x25; | ||
295 | mas_writemem(MAS_BANK_D0, MAS_D0_IO_CONTROL_MAIN, &shadow_io_control_main, 1); | ||
296 | |||
297 | /* Start the Layer2/3 decoder applications */ | ||
298 | val = 0x0c; | ||
299 | mas_writemem(MAS_BANK_D0, MAS_D0_APP_SELECT, &val, 1); | ||
300 | do | ||
301 | { | ||
302 | mas_readmem(MAS_BANK_D0, MAS_D0_APP_RUNNING, &val, 1); | ||
303 | } while((val & 0x0c) != 0x0c); | ||
304 | |||
305 | #if CONFIG_CODEC == MAS3587F | ||
306 | mpeg_mode = MPEG_DECODER; | ||
307 | #endif | ||
308 | |||
309 | /* set IRQ6 to edge detect */ | ||
310 | ICR |= 0x02; | ||
311 | |||
312 | /* set IRQ6 prio 8 */ | ||
313 | IPRB = ( IPRB & 0xff0f ) | 0x0080; | ||
314 | |||
315 | DEBUGF("MAS Decoding application started\n"); | ||
316 | } | ||
317 | #endif /* #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) */ | ||
318 | |||
319 | void mp3_init(int volume, int bass, int treble, int balance, int loudness, | ||
320 | int avc, int channel_config, int stereo_width, | ||
321 | int mdb_strength, int mdb_harmonics, | ||
322 | int mdb_center, int mdb_shape, bool mdb_enable, | ||
323 | bool superbass) | ||
324 | { | ||
325 | #if CONFIG_CODEC == MAS3507D | ||
326 | unsigned long val; | ||
327 | (void)loudness; | ||
328 | (void)avc; | ||
329 | (void)mdb_strength; | ||
330 | (void)mdb_harmonics; | ||
331 | (void)mdb_center; | ||
332 | (void)mdb_shape; | ||
333 | (void)mdb_enable; | ||
334 | (void)superbass; | ||
335 | #endif | ||
336 | |||
337 | setup_sci0(); | ||
338 | |||
339 | #ifdef HAVE_MAS_SIBI_CONTROL | ||
340 | and_b(~0x01, &PBDRH); /* drive SIBI low */ | ||
341 | or_b(0x01, &PBIORH); /* output for PB8 */ | ||
342 | #endif | ||
343 | |||
344 | #if CONFIG_CODEC == MAS3507D | ||
345 | mas_reset(); | ||
346 | #elif CONFIG_CODEC == MAS3587F | ||
347 | or_b(0x08, &PAIORH); /* output for /PR */ | ||
348 | init_playback(); | ||
349 | |||
350 | mas_version_code = mas_readver(); | ||
351 | DEBUGF("MAS3587 derivate %d, version %c%d\n", | ||
352 | (mas_version_code & 0xf000) >> 12, | ||
353 | 'A' + ((mas_version_code & 0x0f00) >> 8), mas_version_code & 0xff); | ||
354 | #elif CONFIG_CODEC == MAS3539F | ||
355 | or_b(0x08, &PAIORH); /* output for /PR */ | ||
356 | init_playback(); | ||
357 | |||
358 | mas_version_code = mas_readver(); | ||
359 | DEBUGF("MAS3539 derivate %d, version %c%d\n", | ||
360 | (mas_version_code & 0xf000) >> 12, | ||
361 | 'A' + ((mas_version_code & 0x0f00) >> 8), mas_version_code & 0xff); | ||
362 | #endif | ||
363 | |||
364 | #ifdef HAVE_DAC3550A | ||
365 | dac_init(); | ||
366 | #endif | ||
367 | |||
368 | #if CONFIG_CODEC == MAS3507D | ||
369 | /* set IRQ6 to edge detect */ | ||
370 | ICR |= 0x02; | ||
371 | |||
372 | /* set IRQ6 prio 8 */ | ||
373 | IPRB = ( IPRB & 0xff0f ) | 0x0080; | ||
374 | |||
375 | mas_readmem(MAS_BANK_D1, 0xff7, &mas_version_code, 1); | ||
376 | |||
377 | mas_writereg(0x3b, 0x20); /* Don't ask why. The data sheet doesn't say */ | ||
378 | mas_run(1); | ||
379 | sleep(HZ); | ||
380 | |||
381 | /* Clear the upper 12 bits of the 32-bit samples */ | ||
382 | mas_writereg(0xc5, 0); | ||
383 | mas_writereg(0xc6, 0); | ||
384 | |||
385 | /* We need to set the PLL for a 14.31818MHz crystal */ | ||
386 | if(mas_version_code == 0x0601) /* Version F10? */ | ||
387 | { | ||
388 | val = 0x5d9d0; | ||
389 | mas_writemem(MAS_BANK_D0, 0x32d, &val, 1); | ||
390 | val = 0xfffceceb; | ||
391 | mas_writemem(MAS_BANK_D0, 0x32e, &val, 1); | ||
392 | val = 0x0; | ||
393 | mas_writemem(MAS_BANK_D0, 0x32f, &val, 1); | ||
394 | mas_run(0x475); | ||
395 | } | ||
396 | else | ||
397 | { | ||
398 | val = 0x5d9d0; | ||
399 | mas_writemem(MAS_BANK_D0, 0x36d, &val, 1); | ||
400 | val = 0xfffceceb; | ||
401 | mas_writemem(MAS_BANK_D0, 0x36e, &val, 1); | ||
402 | val = 0x0; | ||
403 | mas_writemem(MAS_BANK_D0, 0x36f, &val, 1); | ||
404 | mas_run(0xfcb); | ||
405 | } | ||
406 | |||
407 | #endif | ||
408 | |||
409 | #if CONFIG_CODEC == MAS3507D | ||
410 | mas_poll_start(); | ||
411 | |||
412 | mas_writereg(MAS_REG_KPRESCALE, 0xe9400); | ||
413 | dac_enable(true); | ||
414 | #endif | ||
415 | |||
416 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
417 | ICR &= ~0x0010; /* IRQ3 level sensitive */ | ||
418 | PACR1 = (PACR1 & 0x3fff) | 0x4000; /* PA15 is IRQ3 */ | ||
419 | #endif | ||
420 | |||
421 | /* Must be done before calling sound_set() */ | ||
422 | audio_is_initialized = true; | ||
423 | |||
424 | sound_set(SOUND_BASS, bass); | ||
425 | sound_set(SOUND_TREBLE, treble); | ||
426 | sound_set(SOUND_BALANCE, balance); | ||
427 | sound_set(SOUND_VOLUME, volume); | ||
428 | sound_set(SOUND_CHANNELS, channel_config); | ||
429 | sound_set(SOUND_STEREO_WIDTH, stereo_width); | ||
430 | |||
431 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
432 | sound_set(SOUND_LOUDNESS, loudness); | ||
433 | sound_set(SOUND_AVC, avc); | ||
434 | sound_set(SOUND_MDB_STRENGTH, mdb_strength); | ||
435 | sound_set(SOUND_MDB_HARMONICS, mdb_harmonics); | ||
436 | sound_set(SOUND_MDB_CENTER, mdb_center); | ||
437 | sound_set(SOUND_MDB_SHAPE, mdb_shape); | ||
438 | sound_set(SOUND_MDB_ENABLE, mdb_enable); | ||
439 | sound_set(SOUND_SUPERBASS, superbass); | ||
440 | #endif | ||
441 | |||
442 | playing = false; | ||
443 | paused = true; | ||
444 | } | ||
445 | |||
446 | void mp3_shutdown(void) | ||
447 | { | ||
448 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
449 | unsigned long val = 1; | ||
450 | mas_writemem(MAS_BANK_D0, MAS_D0_SOFT_MUTE, &val, 1); /* Mute */ | ||
451 | #endif | ||
452 | |||
453 | #if CONFIG_CODEC == MAS3507D | ||
454 | dac_volume(0, 0, false); | ||
455 | #endif | ||
456 | } | ||
457 | |||
458 | /* new functions, to be exported to plugin API */ | ||
459 | |||
460 | #if CONFIG_CODEC == MAS3587F | ||
461 | void mp3_play_init(void) | ||
462 | { | ||
463 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
464 | init_playback(); | ||
465 | #endif | ||
466 | playing = false; | ||
467 | paused = true; | ||
468 | callback_for_more = NULL; | ||
469 | } | ||
470 | #endif | ||
471 | |||
472 | void mp3_play_data(const void* start, size_t size, | ||
473 | mp3_play_callback_t get_more) | ||
474 | { | ||
475 | /* init DMA */ | ||
476 | DAR3 = 0x5FFFEC3; | ||
477 | CHCR3 &= ~0x0002; /* Clear interrupt */ | ||
478 | CHCR3 = 0x1504; /* Single address destination, TXI0, IE=1 */ | ||
479 | DMAOR = 0x0001; /* Enable DMA */ | ||
480 | |||
481 | callback_for_more = get_more; | ||
482 | |||
483 | SAR3 = (unsigned int)start; | ||
484 | DTCR3 = size & 0xffff; | ||
485 | |||
486 | playing = true; | ||
487 | paused = true; | ||
488 | |||
489 | CHCR3 |= 0x0001; /* Enable DMA IRQ */ | ||
490 | |||
491 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
492 | demand_irq_enable(true); | ||
493 | #endif | ||
494 | } | ||
495 | |||
496 | void mp3_play_pause(bool play) | ||
497 | { | ||
498 | if (paused && play) | ||
499 | { /* resume playback */ | ||
500 | SCR0 |= 0x80; | ||
501 | paused = false; | ||
502 | } | ||
503 | else if (!paused && !play) | ||
504 | { /* stop playback */ | ||
505 | SCR0 &= 0x7f; | ||
506 | paused = true; | ||
507 | } | ||
508 | } | ||
509 | |||
510 | bool mp3_pause_done(void) | ||
511 | { | ||
512 | unsigned long frame_count; | ||
513 | |||
514 | if (!paused) | ||
515 | return false; | ||
516 | |||
517 | mas_readmem(MAS_BANK_D0, MAS_D0_MPEG_FRAME_COUNT, &frame_count, 1); | ||
518 | /* This works because the frame counter never wraps, | ||
519 | * i.e. zero always means lost sync. */ | ||
520 | return frame_count == 0; | ||
521 | } | ||
522 | |||
523 | void mp3_play_stop(void) | ||
524 | { | ||
525 | playing = false; | ||
526 | mp3_play_pause(false); | ||
527 | CHCR3 &= ~0x0001; /* Disable the DMA interrupt */ | ||
528 | #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F) | ||
529 | demand_irq_enable(false); | ||
530 | #endif | ||
531 | } | ||
532 | |||
533 | bool mp3_is_playing(void) | ||
534 | { | ||
535 | return playing; | ||
536 | } | ||
537 | |||
538 | |||
539 | /* returns the next byte position which would be transferred */ | ||
540 | unsigned char* mp3_get_pos(void) | ||
541 | { | ||
542 | return (unsigned char*)SAR3; | ||
543 | } | ||