e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 Sam Lantinga |
4 | |
5 | This library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | This library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with this library; if not, write to the Free Software |
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
18 | |
19 | Carsten Griwodz |
20 | griff@kom.tu-darmstadt.de |
21 | |
22 | based on linux/SDL_dspaudio.c by Sam Lantinga |
23 | */ |
24 | #include "SDL_config.h" |
25 | |
26 | /* Allow access to a raw mixing buffer */ |
27 | |
28 | #include <errno.h> |
29 | #include <unistd.h> |
30 | #include <fcntl.h> |
31 | #include <sys/types.h> |
32 | #include <sys/time.h> |
33 | #include <sys/ioctl.h> |
34 | #include <sys/stat.h> |
35 | #include <sys/mman.h> |
36 | |
37 | #include "SDL_audio.h" |
38 | #include "../SDL_audio_c.h" |
39 | #include "../SDL_audiodev_c.h" |
40 | #include "SDL_umsaudio.h" |
41 | |
42 | /* The tag name used by UMS audio */ |
43 | #define UMS_DRIVER_NAME "ums" |
44 | |
45 | #define DEBUG_AUDIO 1 |
46 | |
47 | /* Audio driver functions */ |
48 | static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec); |
49 | static void UMS_PlayAudio(_THIS); |
50 | static Uint8 *UMS_GetAudioBuf(_THIS); |
51 | static void UMS_CloseAudio(_THIS); |
52 | |
53 | static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags); |
54 | static UMSAudioDevice_ReturnCode UADClose(_THIS); |
55 | static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits); |
56 | static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits); |
57 | static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate); |
58 | static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order); |
59 | static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt); |
60 | static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt); |
61 | static UMSAudioDevice_ReturnCode UADInitialize(_THIS); |
62 | static UMSAudioDevice_ReturnCode UADStart(_THIS); |
63 | static UMSAudioDevice_ReturnCode UADStop(_THIS); |
64 | static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt ); |
65 | static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size ); |
66 | static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size ); |
67 | static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size ); |
68 | static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret ); |
69 | static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume ); |
70 | static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance ); |
71 | static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels ); |
72 | static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block ); |
73 | static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain); |
74 | static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff, long samples, long* samples_written); |
75 | |
76 | /* Audio driver bootstrap functions */ |
77 | static int Audio_Available(void) |
78 | { |
79 | return 1; |
80 | } |
81 | |
82 | static void Audio_DeleteDevice(_THIS) |
83 | { |
84 | if(this->hidden->playbuf._buffer) SDL_free(this->hidden->playbuf._buffer); |
85 | if(this->hidden->fillbuf._buffer) SDL_free(this->hidden->fillbuf._buffer); |
86 | _somFree( this->hidden->umsdev ); |
87 | SDL_free(this->hidden); |
88 | SDL_free(this); |
89 | } |
90 | |
91 | static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
92 | { |
93 | SDL_AudioDevice *this; |
94 | |
95 | /* |
96 | * Allocate and initialize management storage and private management |
97 | * storage for this SDL-using library. |
98 | */ |
99 | this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
100 | if ( this ) { |
101 | SDL_memset(this, 0, (sizeof *this)); |
102 | this->hidden = (struct SDL_PrivateAudioData *)SDL_malloc((sizeof *this->hidden)); |
103 | } |
104 | if ( (this == NULL) || (this->hidden == NULL) ) { |
105 | SDL_OutOfMemory(); |
106 | if ( this ) { |
107 | SDL_free(this); |
108 | } |
109 | return(0); |
110 | } |
111 | SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
112 | #ifdef DEBUG_AUDIO |
113 | fprintf(stderr, "Creating UMS Audio device\n"); |
114 | #endif |
115 | |
116 | /* |
117 | * Calls for UMS env initialization and audio object construction. |
118 | */ |
119 | this->hidden->ev = somGetGlobalEnvironment(); |
120 | this->hidden->umsdev = UMSAudioDeviceNew(); |
121 | |
122 | /* |
123 | * Set the function pointers. |
124 | */ |
125 | this->OpenAudio = UMS_OpenAudio; |
126 | this->WaitAudio = NULL; /* we do blocking output */ |
127 | this->PlayAudio = UMS_PlayAudio; |
128 | this->GetAudioBuf = UMS_GetAudioBuf; |
129 | this->CloseAudio = UMS_CloseAudio; |
130 | this->free = Audio_DeleteDevice; |
131 | |
132 | #ifdef DEBUG_AUDIO |
133 | fprintf(stderr, "done\n"); |
134 | #endif |
135 | return this; |
136 | } |
137 | |
138 | AudioBootStrap UMS_bootstrap = { |
139 | UMS_DRIVER_NAME, "AIX UMS audio", |
140 | Audio_Available, Audio_CreateDevice |
141 | }; |
142 | |
143 | static Uint8 *UMS_GetAudioBuf(_THIS) |
144 | { |
145 | #ifdef DEBUG_AUDIO |
146 | fprintf(stderr, "enter UMS_GetAudioBuf\n"); |
147 | #endif |
148 | return this->hidden->fillbuf._buffer; |
149 | /* |
150 | long bufSize; |
151 | UMSAudioDevice_ReturnCode rc; |
152 | |
153 | rc = UADSetTimeFormat(this, UMSAudioTypes_Bytes ); |
154 | rc = UADWriteBuffSize(this, bufSize ); |
155 | */ |
156 | } |
157 | |
158 | static void UMS_CloseAudio(_THIS) |
159 | { |
160 | UMSAudioDevice_ReturnCode rc; |
161 | |
162 | #ifdef DEBUG_AUDIO |
163 | fprintf(stderr, "enter UMS_CloseAudio\n"); |
164 | #endif |
165 | rc = UADPlayRemainingData(this, TRUE); |
166 | rc = UADStop(this); |
167 | rc = UADClose(this); |
168 | } |
169 | |
170 | static void UMS_PlayAudio(_THIS) |
171 | { |
172 | UMSAudioDevice_ReturnCode rc; |
173 | long samplesToWrite; |
174 | long samplesWritten; |
175 | UMSAudioTypes_Buffer swpbuf; |
176 | |
177 | #ifdef DEBUG_AUDIO |
178 | fprintf(stderr, "enter UMS_PlayAudio\n"); |
179 | #endif |
180 | samplesToWrite = this->hidden->playbuf._length/this->hidden->bytesPerSample; |
181 | do |
182 | { |
183 | rc = UADWrite(this, &this->hidden->playbuf, |
184 | samplesToWrite, |
185 | &samplesWritten ); |
186 | samplesToWrite -= samplesWritten; |
187 | |
188 | /* rc values: UMSAudioDevice_Success |
189 | * UMSAudioDevice_Failure |
190 | * UMSAudioDevice_Preempted |
191 | * UMSAudioDevice_Interrupted |
192 | * UMSAudioDevice_DeviceError |
193 | */ |
194 | if ( rc == UMSAudioDevice_DeviceError ) { |
195 | #ifdef DEBUG_AUDIO |
196 | fprintf(stderr, "Returning from PlayAudio with devices error\n"); |
197 | #endif |
198 | return; |
199 | } |
200 | } |
201 | while(samplesToWrite>0); |
202 | |
203 | SDL_LockAudio(); |
204 | SDL_memcpy( &swpbuf, &this->hidden->playbuf, sizeof(UMSAudioTypes_Buffer) ); |
205 | SDL_memcpy( &this->hidden->playbuf, &this->hidden->fillbuf, sizeof(UMSAudioTypes_Buffer) ); |
206 | SDL_memcpy( &this->hidden->fillbuf, &swpbuf, sizeof(UMSAudioTypes_Buffer) ); |
207 | SDL_UnlockAudio(); |
208 | |
209 | #ifdef DEBUG_AUDIO |
210 | fprintf(stderr, "Wrote audio data and swapped buffer\n"); |
211 | #endif |
212 | } |
213 | |
214 | #if 0 |
215 | // /* Set the DSP frequency */ |
216 | // value = spec->freq; |
217 | // if ( ioctl(this->hidden->audio_fd, SOUND_PCM_WRITE_RATE, &value) < 0 ) { |
218 | // SDL_SetError("Couldn't set audio frequency"); |
219 | // return(-1); |
220 | // } |
221 | // spec->freq = value; |
222 | #endif |
223 | |
224 | static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec) |
225 | { |
226 | char* audiodev = "/dev/paud0"; |
227 | long lgain; |
228 | long rgain; |
229 | long outRate; |
230 | long outBufSize; |
231 | long bitsPerSample; |
232 | long samplesPerSec; |
233 | long success; |
234 | Uint16 test_format; |
235 | int frag_spec; |
236 | UMSAudioDevice_ReturnCode rc; |
237 | |
238 | #ifdef DEBUG_AUDIO |
239 | fprintf(stderr, "enter UMS_OpenAudio\n"); |
240 | #endif |
241 | rc = UADOpen(this, audiodev,"PLAY", UMSAudioDevice_BlockingIO); |
242 | if ( rc != UMSAudioDevice_Success ) { |
243 | SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); |
244 | return -1; |
245 | } |
246 | |
247 | rc = UADSetAudioFormatType(this, "PCM"); |
248 | |
249 | success = 0; |
250 | test_format = SDL_FirstAudioFormat(spec->format); |
251 | do |
252 | { |
253 | #ifdef DEBUG_AUDIO |
254 | fprintf(stderr, "Trying format 0x%4.4x\n", test_format); |
255 | #endif |
256 | switch ( test_format ) |
257 | { |
258 | case AUDIO_U8: |
259 | /* from the mac code: better ? */ |
260 | /* sample_bits = spec->size / spec->samples / spec->channels * 8; */ |
261 | success = 1; |
262 | bitsPerSample = 8; |
263 | rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); |
264 | rc = UADSetByteOrder(this, "MSB"); /* irrelevant */ |
265 | rc = UADSetNumberFormat(this, "UNSIGNED"); |
266 | break; |
267 | case AUDIO_S8: |
268 | success = 1; |
269 | bitsPerSample = 8; |
270 | rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); |
271 | rc = UADSetByteOrder(this, "MSB"); /* irrelevant */ |
272 | rc = UADSetNumberFormat(this, "SIGNED"); |
273 | break; |
274 | case AUDIO_S16LSB: |
275 | success = 1; |
276 | bitsPerSample = 16; |
277 | rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); |
278 | rc = UADSetByteOrder(this, "LSB"); |
279 | rc = UADSetNumberFormat(this, "SIGNED"); |
280 | break; |
281 | case AUDIO_S16MSB: |
282 | success = 1; |
283 | bitsPerSample = 16; |
284 | rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); |
285 | rc = UADSetByteOrder(this, "MSB"); |
286 | rc = UADSetNumberFormat(this, "SIGNED"); |
287 | break; |
288 | case AUDIO_U16LSB: |
289 | success = 1; |
290 | bitsPerSample = 16; |
291 | rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); |
292 | rc = UADSetByteOrder(this, "LSB"); |
293 | rc = UADSetNumberFormat(this, "UNSIGNED"); |
294 | break; |
295 | case AUDIO_U16MSB: |
296 | success = 1; |
297 | bitsPerSample = 16; |
298 | rc = UADSetSampleRate(this, spec->freq << 16, &outRate ); |
299 | rc = UADSetByteOrder(this, "MSB"); |
300 | rc = UADSetNumberFormat(this, "UNSIGNED"); |
301 | break; |
302 | default: |
303 | break; |
304 | } |
305 | if ( ! success ) { |
306 | test_format = SDL_NextAudioFormat(); |
307 | } |
308 | } |
309 | while ( ! success && test_format ); |
310 | |
311 | if ( success == 0 ) { |
312 | SDL_SetError("Couldn't find any hardware audio formats"); |
313 | return -1; |
314 | } |
315 | |
316 | spec->format = test_format; |
317 | |
318 | for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); |
319 | if ( (0x01<<frag_spec) != spec->size ) { |
320 | SDL_SetError("Fragment size must be a power of two"); |
321 | return -1; |
322 | } |
323 | if ( frag_spec > 2048 ) frag_spec = 2048; |
324 | |
325 | this->hidden->bytesPerSample = (bitsPerSample / 8) * spec->channels; |
326 | samplesPerSec = this->hidden->bytesPerSample * outRate; |
327 | |
328 | this->hidden->playbuf._length = 0; |
329 | this->hidden->playbuf._maximum = spec->size; |
330 | this->hidden->playbuf._buffer = (unsigned char*)SDL_malloc(spec->size); |
331 | this->hidden->fillbuf._length = 0; |
332 | this->hidden->fillbuf._maximum = spec->size; |
333 | this->hidden->fillbuf._buffer = (unsigned char*)SDL_malloc(spec->size); |
334 | |
335 | rc = UADSetBitsPerSample(this, bitsPerSample ); |
336 | rc = UADSetDMABufferSize(this, frag_spec, &outBufSize ); |
337 | rc = UADSetChannels(this, spec->channels); /* functions reduces to mono or stereo */ |
338 | |
339 | lgain = 100; /*maximum left input gain*/ |
340 | rgain = 100; /*maimum right input gain*/ |
341 | rc = UADEnableOutput(this, "LINE_OUT",&lgain,&rgain); |
342 | rc = UADInitialize(this); |
343 | rc = UADStart(this); |
344 | rc = UADSetVolume(this, 100); |
345 | rc = UADSetBalance(this, 0); |
346 | |
347 | /* We're ready to rock and roll. :-) */ |
348 | return 0; |
349 | } |
350 | |
351 | \f |
352 | static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits) |
353 | { |
354 | return UMSAudioDevice_get_bits_per_sample( this->hidden->umsdev, |
355 | this->hidden->ev, |
356 | bits ); |
357 | } |
358 | |
359 | static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits) |
360 | { |
361 | return UMSAudioDevice_set_bits_per_sample( this->hidden->umsdev, |
362 | this->hidden->ev, |
363 | bits ); |
364 | } |
365 | |
366 | static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate) |
367 | { |
368 | /* from the mac code: sample rate = spec->freq << 16; */ |
369 | return UMSAudioDevice_set_sample_rate( this->hidden->umsdev, |
370 | this->hidden->ev, |
371 | rate, |
372 | set_rate ); |
373 | } |
374 | |
375 | static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order) |
376 | { |
377 | return UMSAudioDevice_set_byte_order( this->hidden->umsdev, |
378 | this->hidden->ev, |
379 | byte_order ); |
380 | } |
381 | |
382 | static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt) |
383 | { |
384 | /* possible PCM, A_LAW or MU_LAW */ |
385 | return UMSAudioDevice_set_audio_format_type( this->hidden->umsdev, |
386 | this->hidden->ev, |
387 | fmt ); |
388 | } |
389 | |
390 | static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt) |
391 | { |
392 | /* possible SIGNED, UNSIGNED, or TWOS_COMPLEMENT */ |
393 | return UMSAudioDevice_set_number_format( this->hidden->umsdev, |
394 | this->hidden->ev, |
395 | fmt ); |
396 | } |
397 | |
398 | static UMSAudioDevice_ReturnCode UADInitialize(_THIS) |
399 | { |
400 | return UMSAudioDevice_initialize( this->hidden->umsdev, |
401 | this->hidden->ev ); |
402 | } |
403 | |
404 | static UMSAudioDevice_ReturnCode UADStart(_THIS) |
405 | { |
406 | return UMSAudioDevice_start( this->hidden->umsdev, |
407 | this->hidden->ev ); |
408 | } |
409 | |
410 | static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt ) |
411 | { |
412 | /* |
413 | * Switches the time format to the new format, immediately. |
414 | * possible UMSAudioTypes_Msecs, UMSAudioTypes_Bytes or UMSAudioTypes_Samples |
415 | */ |
416 | return UMSAudioDevice_set_time_format( this->hidden->umsdev, |
417 | this->hidden->ev, |
418 | fmt ); |
419 | } |
420 | |
421 | static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size ) |
422 | { |
423 | /* |
424 | * returns write buffer size in the current time format |
425 | */ |
426 | return UMSAudioDevice_write_buff_size( this->hidden->umsdev, |
427 | this->hidden->ev, |
428 | buff_size ); |
429 | } |
430 | |
431 | static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size ) |
432 | { |
433 | /* |
434 | * returns amount of available space in the write buffer |
435 | * in the current time format |
436 | */ |
437 | return UMSAudioDevice_write_buff_remain( this->hidden->umsdev, |
438 | this->hidden->ev, |
439 | buff_size ); |
440 | } |
441 | |
442 | static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size ) |
443 | { |
444 | /* |
445 | * returns amount of filled space in the write buffer |
446 | * in the current time format |
447 | */ |
448 | return UMSAudioDevice_write_buff_used( this->hidden->umsdev, |
449 | this->hidden->ev, |
450 | buff_size ); |
451 | } |
452 | |
453 | static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret ) |
454 | { |
455 | /* |
456 | * Request a new DMA buffer size, maximum requested size 2048. |
457 | * Takes effect with next initialize() call. |
458 | * Devices may or may not support DMA. |
459 | */ |
460 | return UMSAudioDevice_set_DMA_buffer_size( this->hidden->umsdev, |
461 | this->hidden->ev, |
462 | bytes, |
463 | bytes_ret ); |
464 | } |
465 | |
466 | static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume ) |
467 | { |
468 | /* |
469 | * Set the volume. |
470 | * Takes effect immediately. |
471 | */ |
472 | return UMSAudioDevice_set_volume( this->hidden->umsdev, |
473 | this->hidden->ev, |
474 | volume ); |
475 | } |
476 | |
477 | static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance ) |
478 | { |
479 | /* |
480 | * Set the balance. |
481 | * Takes effect immediately. |
482 | */ |
483 | return UMSAudioDevice_set_balance( this->hidden->umsdev, |
484 | this->hidden->ev, |
485 | balance ); |
486 | } |
487 | |
488 | static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels ) |
489 | { |
490 | /* |
491 | * Set mono or stereo. |
492 | * Takes effect with next initialize() call. |
493 | */ |
494 | if ( channels != 1 ) channels = 2; |
495 | return UMSAudioDevice_set_number_of_channels( this->hidden->umsdev, |
496 | this->hidden->ev, |
497 | channels ); |
498 | } |
499 | |
500 | static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags) |
501 | { |
502 | return UMSAudioDevice_open( this->hidden->umsdev, |
503 | this->hidden->ev, |
504 | device, |
505 | mode, |
506 | flags ); |
507 | } |
508 | |
509 | static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff, |
510 | long samples, |
511 | long* samples_written) |
512 | { |
513 | return UMSAudioDevice_write( this->hidden->umsdev, |
514 | this->hidden->ev, |
515 | buff, |
516 | samples, |
517 | samples_written ); |
518 | } |
519 | |
520 | static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block ) |
521 | { |
522 | return UMSAudioDevice_play_remaining_data( this->hidden->umsdev, |
523 | this->hidden->ev, |
524 | block); |
525 | } |
526 | |
527 | static UMSAudioDevice_ReturnCode UADStop(_THIS) |
528 | { |
529 | return UMSAudioDevice_stop( this->hidden->umsdev, |
530 | this->hidden->ev ); |
531 | } |
532 | |
533 | static UMSAudioDevice_ReturnCode UADClose(_THIS) |
534 | { |
535 | return UMSAudioDevice_close( this->hidden->umsdev, |
536 | this->hidden->ev ); |
537 | } |
538 | |
539 | static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain) |
540 | { |
541 | return UMSAudioDevice_enable_output( this->hidden->umsdev, |
542 | this->hidden->ev, |
543 | output, |
544 | left_gain, |
545 | right_gain ); |
546 | } |
547 | |