diff options
Diffstat (limited to 'firmware/target/hosted/ibasso/pcm-ibasso.c')
-rw-r--r-- | firmware/target/hosted/ibasso/pcm-ibasso.c | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/firmware/target/hosted/ibasso/pcm-ibasso.c b/firmware/target/hosted/ibasso/pcm-ibasso.c new file mode 100644 index 0000000000..14ef298af0 --- /dev/null +++ b/firmware/target/hosted/ibasso/pcm-ibasso.c | |||
@@ -0,0 +1,488 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___ | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * | ||
9 | * Copyright (C) 2014 by Ilia Sergachev: Initial Rockbox port to iBasso DX50 | ||
10 | * Copyright (C) 2014 by Mario Basister: iBasso DX90 port | ||
11 | * Copyright (C) 2014 by Simon Rothen: Initial Rockbox repository submission, additional features | ||
12 | * Copyright (C) 2014 by Udo Schläpfer: Code clean up, additional features | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
20 | * KIND, either express or implied. | ||
21 | * | ||
22 | ****************************************************************************/ | ||
23 | |||
24 | |||
25 | #include <pthread.h> | ||
26 | #include <stdbool.h> | ||
27 | #include <unistd.h> | ||
28 | |||
29 | #include "config.h" | ||
30 | #include "debug.h" | ||
31 | #include "panic.h" | ||
32 | #include "pcm.h" | ||
33 | #include "pcm-internal.h" | ||
34 | |||
35 | #include "sound/asound.h" | ||
36 | #include "tinyalsa/asoundlib.h" | ||
37 | |||
38 | #include "debug-ibasso.h" | ||
39 | #include "sysfs-ibasso.h" | ||
40 | |||
41 | |||
42 | /* Tiny alsa handle. */ | ||
43 | static struct pcm* _alsa_handle = NULL; | ||
44 | |||
45 | |||
46 | /* Bytes left in the Rockbox PCM frame buffer. */ | ||
47 | static size_t _pcm_buffer_size = 0; | ||
48 | |||
49 | |||
50 | /* Rockbox PCM frame buffer. */ | ||
51 | static const void *_pcm_buffer = NULL; | ||
52 | |||
53 | |||
54 | /* | ||
55 | 1: PCM thread suspended. | ||
56 | 0: PCM thread running. | ||
57 | These are used by pcm_play_[lock|unlock] or pcm_play_dma_[start|stop|pause]. These need to be | ||
58 | separated because of nested calls for locking and stopping. | ||
59 | */ | ||
60 | static volatile sig_atomic_t _dma_stopped = 1; | ||
61 | static volatile sig_atomic_t _dma_locked = 1; | ||
62 | |||
63 | |||
64 | /* Mutex for PCM thread suspend/unsuspend. */ | ||
65 | static pthread_mutex_t _dma_suspended_mtx = PTHREAD_MUTEX_INITIALIZER; | ||
66 | |||
67 | |||
68 | /* Signal condition for PCM thread suspend/unsuspend. */ | ||
69 | static pthread_cond_t _dma_suspended_cond = PTHREAD_COND_INITIALIZER; | ||
70 | |||
71 | |||
72 | static void* pcm_thread_run(void* nothing) | ||
73 | { | ||
74 | (void) nothing; | ||
75 | |||
76 | DEBUGF("DEBUG %s: Thread start.", __func__); | ||
77 | |||
78 | while(true) | ||
79 | { | ||
80 | pthread_mutex_lock(&_dma_suspended_mtx); | ||
81 | while((_dma_stopped == 1) || (_dma_locked == 1)) | ||
82 | { | ||
83 | DEBUGF("DEBUG %s: Playback suspended.", __func__); | ||
84 | pthread_cond_wait(&_dma_suspended_cond, &_dma_suspended_mtx); | ||
85 | DEBUGF("DEBUG %s: Playback resumed.", __func__); | ||
86 | } | ||
87 | pthread_mutex_unlock(&_dma_suspended_mtx); | ||
88 | |||
89 | if(_pcm_buffer_size == 0) | ||
90 | { | ||
91 | /* Retrive a new PCM buffer from Rockbox. */ | ||
92 | if(! pcm_play_dma_complete_callback(PCM_DMAST_OK, &_pcm_buffer, &_pcm_buffer_size)) | ||
93 | { | ||
94 | DEBUGF("DEBUG %s: No new buffer.", __func__); | ||
95 | |||
96 | usleep( 10000 ); | ||
97 | continue; | ||
98 | } | ||
99 | } | ||
100 | pcm_play_dma_status_callback(PCM_DMAST_STARTED); | ||
101 | |||
102 | /* This relies on Rockbox PCM frame buffer size == ALSA PCM frame buffer size. */ | ||
103 | if(pcm_write(_alsa_handle, _pcm_buffer, _pcm_buffer_size) != 0) | ||
104 | { | ||
105 | DEBUGF("ERROR %s: pcm_write failed: %s.", __func__, pcm_get_error(_alsa_handle)); | ||
106 | |||
107 | usleep( 10000 ); | ||
108 | continue; | ||
109 | } | ||
110 | |||
111 | _pcm_buffer_size = 0; | ||
112 | |||
113 | /*DEBUGF("DEBUG %s: Thread running.", __func__);*/ | ||
114 | } | ||
115 | |||
116 | DEBUGF("DEBUG %s: Thread end.", __func__); | ||
117 | |||
118 | return 0; | ||
119 | } | ||
120 | |||
121 | |||
122 | #ifdef DEBUG | ||
123 | |||
124 | /* https://github.com/tinyalsa/tinyalsa/blob/master/tinypcminfo.c */ | ||
125 | |||
126 | static const char* format_lookup[] = | ||
127 | { | ||
128 | /*[0] =*/ "S8", | ||
129 | "U8", | ||
130 | "S16_LE", | ||
131 | "S16_BE", | ||
132 | "U16_LE", | ||
133 | "U16_BE", | ||
134 | "S24_LE", | ||
135 | "S24_BE", | ||
136 | "U24_LE", | ||
137 | "U24_BE", | ||
138 | "S32_LE", | ||
139 | "S32_BE", | ||
140 | "U32_LE", | ||
141 | "U32_BE", | ||
142 | "FLOAT_LE", | ||
143 | "FLOAT_BE", | ||
144 | "FLOAT64_LE", | ||
145 | "FLOAT64_BE", | ||
146 | "IEC958_SUBFRAME_LE", | ||
147 | "IEC958_SUBFRAME_BE", | ||
148 | "MU_LAW", | ||
149 | "A_LAW", | ||
150 | "IMA_ADPCM", | ||
151 | "MPEG", | ||
152 | /*[24] =*/ "GSM", | ||
153 | [31] = "SPECIAL", | ||
154 | "S24_3LE", | ||
155 | "S24_3BE", | ||
156 | "U24_3LE", | ||
157 | "U24_3BE", | ||
158 | "S20_3LE", | ||
159 | "S20_3BE", | ||
160 | "U20_3LE", | ||
161 | "U20_3BE", | ||
162 | "S18_3LE", | ||
163 | "S18_3BE", | ||
164 | "U18_3LE", | ||
165 | /*[43] =*/ "U18_3BE" | ||
166 | }; | ||
167 | |||
168 | |||
169 | static const char* pcm_get_format_name(unsigned int bit_index) | ||
170 | { | ||
171 | return(bit_index < 43 ? format_lookup[bit_index] : NULL); | ||
172 | } | ||
173 | |||
174 | #endif | ||
175 | |||
176 | |||
177 | /* Thread that copies the Rockbox PCM buffer to ALSA. */ | ||
178 | static pthread_t _pcm_thread; | ||
179 | |||
180 | |||
181 | /* ALSA card and device. */ | ||
182 | static const unsigned int CARD = 0; | ||
183 | static const unsigned int DEVICE = 0; | ||
184 | |||
185 | |||
186 | /* ALSA config. */ | ||
187 | static struct pcm_config _config; | ||
188 | |||
189 | |||
190 | void pcm_play_dma_init(void) | ||
191 | { | ||
192 | TRACE; | ||
193 | |||
194 | #ifdef DEBUG | ||
195 | |||
196 | /* | ||
197 | DEBUG pcm_play_dma_init: Access: 0x000009 | ||
198 | DEBUG pcm_play_dma_init: Format[0]: 0x000044 | ||
199 | DEBUG pcm_play_dma_init: Format[1]: 0x000010 | ||
200 | DEBUG pcm_play_dma_init: Format: S16_LE | ||
201 | DEBUG pcm_play_dma_init: Format: S24_LE | ||
202 | DEBUG pcm_play_dma_init: Format: S20_3LE | ||
203 | DEBUG pcm_play_dma_init: Subformat: 0x000001 | ||
204 | DEBUG pcm_play_dma_init: Rate: min = 8000Hz, max = 192000Hz | ||
205 | DEBUG pcm_play_dma_init: Channels: min = 2, max = 2 | ||
206 | DEBUG pcm_play_dma_init: Sample bits: min=16, max=32 | ||
207 | DEBUG pcm_play_dma_init: Period size: min=8, max=10922 | ||
208 | DEBUG pcm_play_dma_init: Period count: min=3, max=128 | ||
209 | DEBUG pcm_play_dma_init: 0 mixer controls. | ||
210 | */ | ||
211 | |||
212 | struct pcm_params* params = pcm_params_get(CARD, DEVICE, PCM_OUT); | ||
213 | if(params == NULL) | ||
214 | { | ||
215 | DEBUGF("ERROR %s: Card/device does not exist.", __func__); | ||
216 | panicf("ERROR %s: Card/device does not exist.", __func__); | ||
217 | return; | ||
218 | } | ||
219 | |||
220 | struct pcm_mask* m = pcm_params_get_mask(params, PCM_PARAM_ACCESS); | ||
221 | if(m) | ||
222 | { | ||
223 | DEBUGF("DEBUG %s: Access: %#08x", __func__, m->bits[0]); | ||
224 | } | ||
225 | |||
226 | m = pcm_params_get_mask(params, PCM_PARAM_FORMAT); | ||
227 | if(m) | ||
228 | { | ||
229 | DEBUGF("DEBUG %s: Format[0]: %#08x", __func__, m->bits[0]); | ||
230 | DEBUGF("DEBUG %s: Format[1]: %#08x", __func__, m->bits[1]); | ||
231 | |||
232 | unsigned int j; | ||
233 | unsigned int k; | ||
234 | const unsigned int bitcount = sizeof(m->bits[0]) * 8; | ||
235 | for(k = 0; k < 2; ++k) | ||
236 | { | ||
237 | for(j = 0; j < bitcount; ++j) | ||
238 | { | ||
239 | const char* name; | ||
240 | if(m->bits[k] & (1 << j)) | ||
241 | { | ||
242 | name = pcm_get_format_name(j + (k * bitcount)); | ||
243 | if(name) | ||
244 | { | ||
245 | DEBUGF("DEBUG %s: Format: %s", __func__, name); | ||
246 | } | ||
247 | } | ||
248 | } | ||
249 | } | ||
250 | } | ||
251 | |||
252 | m = pcm_params_get_mask(params, PCM_PARAM_SUBFORMAT); | ||
253 | if(m) | ||
254 | { | ||
255 | DEBUGF("DEBUG %s: Subformat: %#08x", __func__, m->bits[0]); | ||
256 | } | ||
257 | |||
258 | unsigned int min = pcm_params_get_min(params, PCM_PARAM_RATE); | ||
259 | unsigned int max = pcm_params_get_max(params, PCM_PARAM_RATE) ; | ||
260 | DEBUGF("DEBUG %s: Rate: min = %uHz, max = %uHz", __func__, min, max); | ||
261 | |||
262 | min = pcm_params_get_min(params, PCM_PARAM_CHANNELS); | ||
263 | max = pcm_params_get_max(params, PCM_PARAM_CHANNELS); | ||
264 | DEBUGF("DEBUG %s: Channels: min = %u, max = %u", __func__, min, max); | ||
265 | |||
266 | min = pcm_params_get_min(params, PCM_PARAM_SAMPLE_BITS); | ||
267 | max = pcm_params_get_max(params, PCM_PARAM_SAMPLE_BITS); | ||
268 | DEBUGF("DEBUG %s: Sample bits: min=%u, max=%u", __func__, min, max); | ||
269 | |||
270 | min = pcm_params_get_min(params, PCM_PARAM_PERIOD_SIZE); | ||
271 | max = pcm_params_get_max(params, PCM_PARAM_PERIOD_SIZE); | ||
272 | DEBUGF("DEBUG %s: Period size: min=%u, max=%u", __func__, min, max); | ||
273 | |||
274 | min = pcm_params_get_min(params, PCM_PARAM_PERIODS); | ||
275 | max = pcm_params_get_max(params, PCM_PARAM_PERIODS); | ||
276 | DEBUGF("DEBUG %s: Period count: min=%u, max=%u", __func__, min, max); | ||
277 | |||
278 | pcm_params_free(params); | ||
279 | |||
280 | struct mixer* mixer = mixer_open(CARD); | ||
281 | if(! mixer) | ||
282 | { | ||
283 | DEBUGF("ERROR %s: Failed to open mixer.", __func__); | ||
284 | } | ||
285 | else | ||
286 | { | ||
287 | int num_ctls = mixer_get_num_ctls(mixer); | ||
288 | |||
289 | DEBUGF("DEBUG %s: %d mixer controls.", __func__, num_ctls); | ||
290 | |||
291 | mixer_close(mixer); | ||
292 | } | ||
293 | |||
294 | #endif | ||
295 | |||
296 | if(_alsa_handle != NULL) | ||
297 | { | ||
298 | DEBUGF("ERROR %s: Allready initialized.", __func__); | ||
299 | panicf("ERROR %s: Allready initialized.", __func__); | ||
300 | return; | ||
301 | } | ||
302 | |||
303 | /* | ||
304 | Rockbox outputs 16 Bit/44.1kHz stereo by default. | ||
305 | |||
306 | ALSA frame buffer size = config.period_count * config.period_size * config.channels * (16 \ 8) | ||
307 | = 4 * 256 * 2 * 2 | ||
308 | = 4096 | ||
309 | = Rockbox PCM buffer size | ||
310 | pcm_thread_run relies on this size match. See pcm_mixer.h. | ||
311 | */ | ||
312 | _config.channels = 2; | ||
313 | _config.rate = 44100; | ||
314 | _config.period_size = 256; | ||
315 | _config.period_count = 4; | ||
316 | _config.format = PCM_FORMAT_S16_LE; | ||
317 | _config.start_threshold = 0; | ||
318 | _config.stop_threshold = 0; | ||
319 | _config.silence_threshold = 0; | ||
320 | |||
321 | _alsa_handle = pcm_open(CARD, DEVICE, PCM_OUT, &_config); | ||
322 | if(! pcm_is_ready(_alsa_handle)) | ||
323 | { | ||
324 | DEBUGF("ERROR %s: pcm_open failed: %s.", __func__, pcm_get_error(_alsa_handle)); | ||
325 | panicf("ERROR %s: pcm_open failed: %s.", __func__, pcm_get_error(_alsa_handle)); | ||
326 | return; | ||
327 | } | ||
328 | |||
329 | DEBUGF("DEBUG %s: ALSA PCM frame buffer size: %d.", __func__, pcm_frames_to_bytes(_alsa_handle, pcm_get_buffer_size(_alsa_handle))); | ||
330 | |||
331 | /* Create pcm thread in the suspended state. */ | ||
332 | pthread_mutex_lock(&_dma_suspended_mtx); | ||
333 | _dma_stopped = 1; | ||
334 | _dma_locked = 1; | ||
335 | pthread_create(&_pcm_thread, NULL, pcm_thread_run, NULL); | ||
336 | pthread_mutex_unlock(&_dma_suspended_mtx); | ||
337 | } | ||
338 | |||
339 | |||
340 | void pcm_play_dma_start(const void *addr, size_t size) | ||
341 | { | ||
342 | TRACE; | ||
343 | |||
344 | /* | ||
345 | DX50 | ||
346 | /sys/class/codec/mute | ||
347 | Mute: echo 'A' > /sys/class/codec/mute | ||
348 | Unmute: echo 'B' > /sys/class/codec/mute | ||
349 | |||
350 | DX90? | ||
351 | */ | ||
352 | if(! sysfs_set_char(SYSFS_MUTE, 'B')) | ||
353 | { | ||
354 | DEBUGF("ERROR %s: Could not unmute.", __func__); | ||
355 | panicf("ERROR %s: Could not unmute.", __func__); | ||
356 | } | ||
357 | |||
358 | _pcm_buffer = addr; | ||
359 | _pcm_buffer_size = size; | ||
360 | |||
361 | pthread_mutex_lock(&_dma_suspended_mtx); | ||
362 | _dma_stopped = 0; | ||
363 | pthread_cond_signal(&_dma_suspended_cond); | ||
364 | pthread_mutex_unlock(&_dma_suspended_mtx); | ||
365 | } | ||
366 | |||
367 | |||
368 | /* TODO: Why is this in the API if it gets never called? */ | ||
369 | void pcm_play_dma_pause(bool pause) | ||
370 | { | ||
371 | TRACE; | ||
372 | |||
373 | pthread_mutex_lock(&_dma_suspended_mtx); | ||
374 | _dma_stopped = pause ? 1 : 0; | ||
375 | if(_dma_stopped == 0) | ||
376 | { | ||
377 | pthread_cond_signal(&_dma_suspended_cond); | ||
378 | } | ||
379 | pthread_mutex_unlock(&_dma_suspended_mtx); | ||
380 | } | ||
381 | |||
382 | |||
383 | void pcm_play_dma_stop(void) | ||
384 | { | ||
385 | TRACE; | ||
386 | |||
387 | pthread_mutex_lock(&_dma_suspended_mtx); | ||
388 | _dma_stopped = 1; | ||
389 | pcm_stop(_alsa_handle); | ||
390 | pthread_mutex_unlock(&_dma_suspended_mtx); | ||
391 | } | ||
392 | |||
393 | |||
394 | /* Unessecary play locks before pcm_play_dma_postinit. */ | ||
395 | static int _play_lock_recursion_count = -10000; | ||
396 | |||
397 | |||
398 | void pcm_play_dma_postinit(void) | ||
399 | { | ||
400 | TRACE; | ||
401 | |||
402 | _play_lock_recursion_count = 0; | ||
403 | } | ||
404 | |||
405 | |||
406 | void pcm_play_lock(void) | ||
407 | { | ||
408 | TRACE; | ||
409 | |||
410 | ++_play_lock_recursion_count; | ||
411 | |||
412 | if(_play_lock_recursion_count == 1) | ||
413 | { | ||
414 | pthread_mutex_lock(&_dma_suspended_mtx); | ||
415 | _dma_locked = 1; | ||
416 | pthread_mutex_unlock(&_dma_suspended_mtx); | ||
417 | } | ||
418 | } | ||
419 | |||
420 | |||
421 | void pcm_play_unlock(void) | ||
422 | { | ||
423 | TRACE; | ||
424 | |||
425 | --_play_lock_recursion_count; | ||
426 | |||
427 | if(_play_lock_recursion_count == 0) | ||
428 | { | ||
429 | pthread_mutex_lock(&_dma_suspended_mtx); | ||
430 | _dma_locked = 0; | ||
431 | pthread_cond_signal(&_dma_suspended_cond); | ||
432 | pthread_mutex_unlock(&_dma_suspended_mtx); | ||
433 | } | ||
434 | } | ||
435 | |||
436 | |||
437 | void pcm_dma_apply_settings(void) | ||
438 | { | ||
439 | unsigned int rate = pcm_get_frequency(); | ||
440 | |||
441 | DEBUGF("DEBUG %s: Current sample rate: %u, next sampe rate: %u.", __func__, _config.rate, rate); | ||
442 | |||
443 | if(( _config.rate != rate) && (rate >= 8000) && (rate <= 192000)) | ||
444 | { | ||
445 | _config.rate = rate; | ||
446 | |||
447 | pcm_close(_alsa_handle); | ||
448 | _alsa_handle = pcm_open(CARD, DEVICE, PCM_OUT, &_config); | ||
449 | |||
450 | if(! pcm_is_ready(_alsa_handle)) | ||
451 | { | ||
452 | DEBUGF("ERROR %s: pcm_open failed: %s.", __func__, pcm_get_error(_alsa_handle)); | ||
453 | panicf("ERROR %s: pcm_open failed: %s.", __func__, pcm_get_error(_alsa_handle)); | ||
454 | } | ||
455 | } | ||
456 | } | ||
457 | |||
458 | |||
459 | size_t pcm_get_bytes_waiting(void) | ||
460 | { | ||
461 | TRACE; | ||
462 | |||
463 | return _pcm_buffer_size; | ||
464 | } | ||
465 | |||
466 | |||
467 | /* TODO: WTF */ | ||
468 | const void* pcm_play_dma_get_peak_buffer(int* count) | ||
469 | { | ||
470 | TRACE; | ||
471 | |||
472 | uintptr_t addr = (uintptr_t) _pcm_buffer; | ||
473 | *count = _pcm_buffer_size / 4; | ||
474 | return (void*) ((addr + 3) & ~3); | ||
475 | } | ||
476 | |||
477 | |||
478 | void pcm_close_device(void) | ||
479 | { | ||
480 | TRACE; | ||
481 | |||
482 | pthread_mutex_lock(&_dma_suspended_mtx); | ||
483 | _dma_stopped = 1; | ||
484 | pthread_mutex_unlock(&_dma_suspended_mtx); | ||
485 | |||
486 | pcm_close(_alsa_handle); | ||
487 | _alsa_handle = NULL; | ||
488 | } | ||