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comparison src/audio/ums/SDL_umsaudio.c @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children c9b51268668f
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-1:000000000000 0:74212992fb08
1 /*
2 AIX support for the SDL - Simple DirectMedia Layer
3 Copyright (C) 2000 Carsten Griwodz
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Carsten Griwodz
20 griff@kom.tu-darmstadt.de
21
22 based on linux/SDL_dspaudio.c by Sam Lantinga
23 */
24
25 #ifdef SAVE_RCSID
26 static char rcsid =
27 "@(#) $Id$";
28 #endif
29
30 /* Allow access to a raw mixing buffer */
31
32 #include <stdlib.h>
33 #include <stdio.h>
34 #include <string.h>
35 #include <errno.h>
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <sys/types.h>
39 #include <sys/time.h>
40 #include <sys/ioctl.h>
41 #include <sys/stat.h>
42 #include <sys/mman.h>
43
44 #include "SDL_audio.h"
45 #include "SDL_error.h"
46 #include "SDL_audio_c.h"
47 #include "SDL_audiodev_c.h"
48 #include "SDL_umsaudio.h"
49
50 /* The tag name used by UMS audio */
51 #define UMS_DRIVER_NAME "ums"
52
53 #define DEBUG_AUDIO 1
54
55 /* Audio driver functions */
56 static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec);
57 static void UMS_PlayAudio(_THIS);
58 static Uint8 *UMS_GetAudioBuf(_THIS);
59 static void UMS_CloseAudio(_THIS);
60
61 static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags);
62 static UMSAudioDevice_ReturnCode UADClose(_THIS);
63 static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits);
64 static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits);
65 static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate);
66 static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order);
67 static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt);
68 static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt);
69 static UMSAudioDevice_ReturnCode UADInitialize(_THIS);
70 static UMSAudioDevice_ReturnCode UADStart(_THIS);
71 static UMSAudioDevice_ReturnCode UADStop(_THIS);
72 static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt );
73 static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size );
74 static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size );
75 static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size );
76 static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret );
77 static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume );
78 static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance );
79 static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels );
80 static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block );
81 static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain);
82 static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff, long samples, long* samples_written);
83
84 /* Audio driver bootstrap functions */
85 static int Audio_Available(void)
86 {
87 return 1;
88 }
89
90 static void Audio_DeleteDevice(_THIS)
91 {
92 if(this->hidden->playbuf._buffer) free(this->hidden->playbuf._buffer);
93 if(this->hidden->fillbuf._buffer) free(this->hidden->fillbuf._buffer);
94 _somFree( this->hidden->umsdev );
95 free(this->hidden);
96 free(this);
97 }
98
99 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
100 {
101 SDL_AudioDevice *this;
102
103 /*
104 * Allocate and initialize management storage and private management
105 * storage for this SDL-using library.
106 */
107 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
108 if ( this ) {
109 memset(this, 0, (sizeof *this));
110 this->hidden = (struct SDL_PrivateAudioData *)malloc((sizeof *this->hidden));
111 }
112 if ( (this == NULL) || (this->hidden == NULL) ) {
113 SDL_OutOfMemory();
114 if ( this ) {
115 free(this);
116 }
117 return(0);
118 }
119 memset(this->hidden, 0, (sizeof *this->hidden));
120 #ifdef DEBUG_AUDIO
121 fprintf(stderr, "Creating UMS Audio device\n");
122 #endif
123
124 /*
125 * Calls for UMS env initialization and audio object construction.
126 */
127 this->hidden->ev = somGetGlobalEnvironment();
128 this->hidden->umsdev = UMSAudioDeviceNew();
129
130 /*
131 * Set the function pointers.
132 */
133 this->OpenAudio = UMS_OpenAudio;
134 this->WaitAudio = NULL; /* we do blocking output */
135 this->PlayAudio = UMS_PlayAudio;
136 this->GetAudioBuf = UMS_GetAudioBuf;
137 this->CloseAudio = UMS_CloseAudio;
138 this->free = Audio_DeleteDevice;
139
140 #ifdef DEBUG_AUDIO
141 fprintf(stderr, "done\n");
142 #endif
143 return this;
144 }
145
146 AudioBootStrap UMS_bootstrap = {
147 UMS_DRIVER_NAME, "AUX UMS audio",
148 Audio_Available, Audio_CreateDevice
149 };
150
151 static Uint8 *UMS_GetAudioBuf(_THIS)
152 {
153 #ifdef DEBUG_AUDIO
154 fprintf(stderr, "enter UMS_GetAudioBuf\n");
155 #endif
156 return this->hidden->fillbuf._buffer;
157 /*
158 long bufSize;
159 UMSAudioDevice_ReturnCode rc;
160
161 rc = UADSetTimeFormat(this, UMSAudioTypes_Bytes );
162 rc = UADWriteBuffSize(this, bufSize );
163 */
164 }
165
166 static void UMS_CloseAudio(_THIS)
167 {
168 UMSAudioDevice_ReturnCode rc;
169
170 #ifdef DEBUG_AUDIO
171 fprintf(stderr, "enter UMS_CloseAudio\n");
172 #endif
173 rc = UADPlayRemainingData(this, TRUE);
174 rc = UADStop(this);
175 rc = UADClose(this);
176 }
177
178 static void UMS_PlayAudio(_THIS)
179 {
180 UMSAudioDevice_ReturnCode rc;
181 long samplesToWrite;
182 long samplesWritten;
183 UMSAudioTypes_Buffer swpbuf;
184
185 #ifdef DEBUG_AUDIO
186 fprintf(stderr, "enter UMS_PlayAudio\n");
187 #endif
188 samplesToWrite = this->hidden->playbuf._length/this->hidden->bytesPerSample;
189 do
190 {
191 rc = UADWrite(this, &this->hidden->playbuf,
192 samplesToWrite,
193 &samplesWritten );
194 samplesToWrite -= samplesWritten;
195
196 /* rc values: UMSAudioDevice_Success
197 * UMSAudioDevice_Failure
198 * UMSAudioDevice_Preempted
199 * UMSAudioDevice_Interrupted
200 * UMSAudioDevice_DeviceError
201 */
202 if ( rc == UMSAudioDevice_DeviceError ) {
203 #ifdef DEBUG_AUDIO
204 fprintf(stderr, "Returning from PlayAudio with devices error\n");
205 #endif
206 return;
207 }
208 }
209 while(samplesToWrite>0);
210
211 SDL_LockAudio();
212 memcpy( &swpbuf, &this->hidden->playbuf, sizeof(UMSAudioTypes_Buffer) );
213 memcpy( &this->hidden->playbuf, &this->hidden->fillbuf, sizeof(UMSAudioTypes_Buffer) );
214 memcpy( &this->hidden->fillbuf, &swpbuf, sizeof(UMSAudioTypes_Buffer) );
215 SDL_UnlockAudio();
216
217 #ifdef DEBUG_AUDIO
218 fprintf(stderr, "Wrote audio data and swapped buffer\n");
219 #endif
220 }
221
222 #if 0
223 // /* Set the DSP frequency */
224 // value = spec->freq;
225 // if ( ioctl(this->hidden->audio_fd, SOUND_PCM_WRITE_RATE, &value) < 0 ) {
226 // SDL_SetError("Couldn't set audio frequency");
227 // return(-1);
228 // }
229 // spec->freq = value;
230 #endif
231
232 static int UMS_OpenAudio(_THIS, SDL_AudioSpec *spec)
233 {
234 char* audiodev = "/dev/paud0";
235 long lgain;
236 long rgain;
237 long outRate;
238 long outBufSize;
239 long bitsPerSample;
240 long samplesPerSec;
241 long success;
242 Uint16 test_format;
243 int frag_spec;
244 UMSAudioDevice_ReturnCode rc;
245
246 #ifdef DEBUG_AUDIO
247 fprintf(stderr, "enter UMS_OpenAudio\n");
248 #endif
249 rc = UADOpen(this, audiodev,"PLAY", UMSAudioDevice_BlockingIO);
250 if ( rc != UMSAudioDevice_Success ) {
251 SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno));
252 return -1;
253 }
254
255 rc = UADSetAudioFormatType(this, "PCM");
256
257 success = 0;
258 test_format = SDL_FirstAudioFormat(spec->format);
259 do
260 {
261 #ifdef DEBUG_AUDIO
262 fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
263 #endif
264 switch ( test_format )
265 {
266 case AUDIO_U8:
267 /* from the mac code: better ? */
268 /* sample_bits = spec->size / spec->samples / spec->channels * 8; */
269 success = 1;
270 bitsPerSample = 8;
271 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
272 rc = UADSetByteOrder(this, "MSB"); /* irrelevant */
273 rc = UADSetNumberFormat(this, "UNSIGNED");
274 break;
275 case AUDIO_S8:
276 success = 1;
277 bitsPerSample = 8;
278 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
279 rc = UADSetByteOrder(this, "MSB"); /* irrelevant */
280 rc = UADSetNumberFormat(this, "SIGNED");
281 break;
282 case AUDIO_S16LSB:
283 success = 1;
284 bitsPerSample = 16;
285 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
286 rc = UADSetByteOrder(this, "LSB");
287 rc = UADSetNumberFormat(this, "SIGNED");
288 break;
289 case AUDIO_S16MSB:
290 success = 1;
291 bitsPerSample = 16;
292 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
293 rc = UADSetByteOrder(this, "MSB");
294 rc = UADSetNumberFormat(this, "SIGNED");
295 break;
296 case AUDIO_U16LSB:
297 success = 1;
298 bitsPerSample = 16;
299 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
300 rc = UADSetByteOrder(this, "LSB");
301 rc = UADSetNumberFormat(this, "UNSIGNED");
302 break;
303 case AUDIO_U16MSB:
304 success = 1;
305 bitsPerSample = 16;
306 rc = UADSetSampleRate(this, spec->freq << 16, &outRate );
307 rc = UADSetByteOrder(this, "MSB");
308 rc = UADSetNumberFormat(this, "UNSIGNED");
309 break;
310 default:
311 break;
312 }
313 if ( ! success ) {
314 test_format = SDL_NextAudioFormat();
315 }
316 }
317 while ( ! success && test_format );
318
319 if ( success == 0 ) {
320 SDL_SetError("Couldn't find any hardware audio formats");
321 return -1;
322 }
323
324 spec->format = test_format;
325
326 for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec );
327 if ( (0x01<<frag_spec) != spec->size ) {
328 SDL_SetError("Fragment size must be a power of two");
329 return -1;
330 }
331 if ( frag_spec > 2048 ) frag_spec = 2048;
332
333 this->hidden->bytesPerSample = (bitsPerSample / 8) * spec->channels;
334 samplesPerSec = this->hidden->bytesPerSample * outRate;
335
336 this->hidden->playbuf._length = 0;
337 this->hidden->playbuf._maximum = spec->size;
338 this->hidden->playbuf._buffer = (unsigned char*)malloc(spec->size);
339 this->hidden->fillbuf._length = 0;
340 this->hidden->fillbuf._maximum = spec->size;
341 this->hidden->fillbuf._buffer = (unsigned char*)malloc(spec->size);
342
343 rc = UADSetBitsPerSample(this, bitsPerSample );
344 rc = UADSetDMABufferSize(this, frag_spec, &outBufSize );
345 rc = UADSetChannels(this, spec->channels); /* functions reduces to mono or stereo */
346
347 lgain = 100; /*maximum left input gain*/
348 rgain = 100; /*maimum right input gain*/
349 rc = UADEnableOutput(this, "LINE_OUT",&lgain,&rgain);
350 rc = UADInitialize(this);
351 rc = UADStart(this);
352 rc = UADSetVolume(this, 100);
353 rc = UADSetBalance(this, 0);
354
355 /* We're ready to rock and roll. :-) */
356 return 0;
357 }
358
359
360 static UMSAudioDevice_ReturnCode UADGetBitsPerSample(_THIS, long* bits)
361 {
362 return UMSAudioDevice_get_bits_per_sample( this->hidden->umsdev,
363 this->hidden->ev,
364 bits );
365 }
366
367 static UMSAudioDevice_ReturnCode UADSetBitsPerSample(_THIS, long bits)
368 {
369 return UMSAudioDevice_set_bits_per_sample( this->hidden->umsdev,
370 this->hidden->ev,
371 bits );
372 }
373
374 static UMSAudioDevice_ReturnCode UADSetSampleRate(_THIS, long rate, long* set_rate)
375 {
376 /* from the mac code: sample rate = spec->freq << 16; */
377 return UMSAudioDevice_set_sample_rate( this->hidden->umsdev,
378 this->hidden->ev,
379 rate,
380 set_rate );
381 }
382
383 static UMSAudioDevice_ReturnCode UADSetByteOrder(_THIS, string byte_order)
384 {
385 return UMSAudioDevice_set_byte_order( this->hidden->umsdev,
386 this->hidden->ev,
387 byte_order );
388 }
389
390 static UMSAudioDevice_ReturnCode UADSetAudioFormatType(_THIS, string fmt)
391 {
392 /* possible PCM, A_LAW or MU_LAW */
393 return UMSAudioDevice_set_audio_format_type( this->hidden->umsdev,
394 this->hidden->ev,
395 fmt );
396 }
397
398 static UMSAudioDevice_ReturnCode UADSetNumberFormat(_THIS, string fmt)
399 {
400 /* possible SIGNED, UNSIGNED, or TWOS_COMPLEMENT */
401 return UMSAudioDevice_set_number_format( this->hidden->umsdev,
402 this->hidden->ev,
403 fmt );
404 }
405
406 static UMSAudioDevice_ReturnCode UADInitialize(_THIS)
407 {
408 return UMSAudioDevice_initialize( this->hidden->umsdev,
409 this->hidden->ev );
410 }
411
412 static UMSAudioDevice_ReturnCode UADStart(_THIS)
413 {
414 return UMSAudioDevice_start( this->hidden->umsdev,
415 this->hidden->ev );
416 }
417
418 static UMSAudioDevice_ReturnCode UADSetTimeFormat(_THIS, UMSAudioTypes_TimeFormat fmt )
419 {
420 /*
421 * Switches the time format to the new format, immediately.
422 * possible UMSAudioTypes_Msecs, UMSAudioTypes_Bytes or UMSAudioTypes_Samples
423 */
424 return UMSAudioDevice_set_time_format( this->hidden->umsdev,
425 this->hidden->ev,
426 fmt );
427 }
428
429 static UMSAudioDevice_ReturnCode UADWriteBuffSize(_THIS, long* buff_size )
430 {
431 /*
432 * returns write buffer size in the current time format
433 */
434 return UMSAudioDevice_write_buff_size( this->hidden->umsdev,
435 this->hidden->ev,
436 buff_size );
437 }
438
439 static UMSAudioDevice_ReturnCode UADWriteBuffRemain(_THIS, long* buff_size )
440 {
441 /*
442 * returns amount of available space in the write buffer
443 * in the current time format
444 */
445 return UMSAudioDevice_write_buff_remain( this->hidden->umsdev,
446 this->hidden->ev,
447 buff_size );
448 }
449
450 static UMSAudioDevice_ReturnCode UADWriteBuffUsed(_THIS, long* buff_size )
451 {
452 /*
453 * returns amount of filled space in the write buffer
454 * in the current time format
455 */
456 return UMSAudioDevice_write_buff_used( this->hidden->umsdev,
457 this->hidden->ev,
458 buff_size );
459 }
460
461 static UMSAudioDevice_ReturnCode UADSetDMABufferSize(_THIS, long bytes, long* bytes_ret )
462 {
463 /*
464 * Request a new DMA buffer size, maximum requested size 2048.
465 * Takes effect with next initialize() call.
466 * Devices may or may not support DMA.
467 */
468 return UMSAudioDevice_set_DMA_buffer_size( this->hidden->umsdev,
469 this->hidden->ev,
470 bytes,
471 bytes_ret );
472 }
473
474 static UMSAudioDevice_ReturnCode UADSetVolume(_THIS, long volume )
475 {
476 /*
477 * Set the volume.
478 * Takes effect immediately.
479 */
480 return UMSAudioDevice_set_volume( this->hidden->umsdev,
481 this->hidden->ev,
482 volume );
483 }
484
485 static UMSAudioDevice_ReturnCode UADSetBalance(_THIS, long balance )
486 {
487 /*
488 * Set the balance.
489 * Takes effect immediately.
490 */
491 return UMSAudioDevice_set_balance( this->hidden->umsdev,
492 this->hidden->ev,
493 balance );
494 }
495
496 static UMSAudioDevice_ReturnCode UADSetChannels(_THIS, long channels )
497 {
498 /*
499 * Set mono or stereo.
500 * Takes effect with next initialize() call.
501 */
502 if ( channels != 1 ) channels = 2;
503 return UMSAudioDevice_set_number_of_channels( this->hidden->umsdev,
504 this->hidden->ev,
505 channels );
506 }
507
508 static UMSAudioDevice_ReturnCode UADOpen(_THIS, string device, string mode, long flags)
509 {
510 return UMSAudioDevice_open( this->hidden->umsdev,
511 this->hidden->ev,
512 device,
513 mode,
514 flags );
515 }
516
517 static UMSAudioDevice_ReturnCode UADWrite(_THIS, UMSAudioTypes_Buffer* buff,
518 long samples,
519 long* samples_written)
520 {
521 return UMSAudioDevice_write( this->hidden->umsdev,
522 this->hidden->ev,
523 buff,
524 samples,
525 samples_written );
526 }
527
528 static UMSAudioDevice_ReturnCode UADPlayRemainingData(_THIS, boolean block )
529 {
530 return UMSAudioDevice_play_remaining_data( this->hidden->umsdev,
531 this->hidden->ev,
532 block);
533 }
534
535 static UMSAudioDevice_ReturnCode UADStop(_THIS)
536 {
537 return UMSAudioDevice_stop( this->hidden->umsdev,
538 this->hidden->ev );
539 }
540
541 static UMSAudioDevice_ReturnCode UADClose(_THIS)
542 {
543 return UMSAudioDevice_close( this->hidden->umsdev,
544 this->hidden->ev );
545 }
546
547 static UMSAudioDevice_ReturnCode UADEnableOutput(_THIS, string output, long* left_gain, long* right_gain)
548 {
549 return UMSAudioDevice_enable_output( this->hidden->umsdev,
550 this->hidden->ev,
551 output,
552 left_gain,
553 right_gain );
554 }
555