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1 | /* | |
2 | ** Copyright (c) 1999-2016, Erik de Castro Lopo <erikd@mega-nerd.com> | |
3 | ** All rights reserved. | |
4 | ** | |
5 | ** This code is released under 2-clause BSD license. Please see the | |
6 | ** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING | |
7 | */ | |
8 | ||
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <string.h> | |
12 | #include <unistd.h> | |
13 | ||
14 | #include <config.h> | |
15 | ||
16 | #include "audio_out.h" | |
17 | ||
18 | #if HAVE_ALSA_ASOUNDLIB_H | |
19 | #define ALSA_PCM_NEW_HW_PARAMS_API | |
20 | #define ALSA_PCM_NEW_SW_PARAMS_API | |
21 | #include <alsa/asoundlib.h> | |
22 | #include <sys/time.h> | |
23 | #endif | |
24 | ||
25 | #if (HAVE_SNDFILE) | |
26 | ||
27 | #include <float_cast.h> | |
28 | ||
29 | #include <sndfile.h> | |
30 | ||
31 | #define BUFFER_LEN (2048) | |
32 | ||
33 | #define MAKE_MAGIC(a,b,c,d,e,f,g,h) \ | |
34 | ((a) + ((b) << 1) + ((c) << 2) + ((d) << 3) + ((e) << 4) + ((f) << 5) + ((g) << 6) + ((h) << 7)) | |
35 | ||
36 | typedef struct AUDIO_OUT_s | |
37 | { int magic ; | |
38 | } AUDIO_OUT ; | |
39 | ||
40 | ||
41 | /*------------------------------------------------------------------------------ | |
42 | ** Linux (ALSA and OSS) functions for playing a sound. | |
43 | */ | |
44 | ||
45 | #if defined (__linux__) | |
46 | ||
47 | #if HAVE_ALSA_ASOUNDLIB_H | |
48 | ||
49 | #define ALSA_MAGIC MAKE_MAGIC ('L', 'n', 'x', '-', 'A', 'L', 'S', 'A') | |
50 | ||
51 | typedef struct | |
52 | { int magic ; | |
53 | snd_pcm_t * dev ; | |
54 | int channels ; | |
55 | } ALSA_AUDIO_OUT ; | |
56 | ||
57 | static int alsa_write_float (snd_pcm_t *alsa_dev, float *data, int frames, int channels) ; | |
58 | ||
59 | static AUDIO_OUT * | |
60 | alsa_open (int channels, unsigned samplerate) | |
61 | { ALSA_AUDIO_OUT *alsa_out ; | |
62 | const char * device = "default" ; | |
63 | snd_pcm_hw_params_t *hw_params ; | |
64 | snd_pcm_uframes_t buffer_size ; | |
65 | snd_pcm_uframes_t alsa_period_size, alsa_buffer_frames ; | |
66 | snd_pcm_sw_params_t *sw_params ; | |
67 | ||
68 | int err ; | |
69 | ||
70 | alsa_period_size = 1024 ; | |
71 | alsa_buffer_frames = 4 * alsa_period_size ; | |
72 | ||
73 | if ((alsa_out = calloc (1, sizeof (ALSA_AUDIO_OUT))) == NULL) | |
74 | { perror ("alsa_open : malloc ") ; | |
75 | exit (1) ; | |
76 | } ; | |
77 | ||
78 | alsa_out->magic = ALSA_MAGIC ; | |
79 | alsa_out->channels = channels ; | |
80 | ||
81 | if ((err = snd_pcm_open (&alsa_out->dev, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) | |
82 | { fprintf (stderr, "cannot open audio device \"%s\" (%s)\n", device, snd_strerror (err)) ; | |
83 | goto catch_error ; | |
84 | } ; | |
85 | ||
86 | snd_pcm_nonblock (alsa_out->dev, 0) ; | |
87 | ||
88 | if ((err = snd_pcm_hw_params_malloc (&hw_params)) < 0) | |
89 | { fprintf (stderr, "cannot allocate hardware parameter structure (%s)\n", snd_strerror (err)) ; | |
90 | goto catch_error ; | |
91 | } ; | |
92 | ||
93 | if ((err = snd_pcm_hw_params_any (alsa_out->dev, hw_params)) < 0) | |
94 | { fprintf (stderr, "cannot initialize hardware parameter structure (%s)\n", snd_strerror (err)) ; | |
95 | goto catch_error ; | |
96 | } ; | |
97 | ||
98 | if ((err = snd_pcm_hw_params_set_access (alsa_out->dev, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) | |
99 | { fprintf (stderr, "cannot set access type (%s)\n", snd_strerror (err)) ; | |
100 | goto catch_error ; | |
101 | } ; | |
102 | ||
103 | if ((err = snd_pcm_hw_params_set_format (alsa_out->dev, hw_params, SND_PCM_FORMAT_FLOAT)) < 0) | |
104 | { fprintf (stderr, "cannot set sample format (%s)\n", snd_strerror (err)) ; | |
105 | goto catch_error ; | |
106 | } ; | |
107 | ||
108 | if ((err = snd_pcm_hw_params_set_rate_near (alsa_out->dev, hw_params, &samplerate, 0)) < 0) | |
109 | { fprintf (stderr, "cannot set sample rate (%s)\n", snd_strerror (err)) ; | |
110 | goto catch_error ; | |
111 | } ; | |
112 | ||
113 | if ((err = snd_pcm_hw_params_set_channels (alsa_out->dev, hw_params, channels)) < 0) | |
114 | { fprintf (stderr, "cannot set channel count (%s)\n", snd_strerror (err)) ; | |
115 | goto catch_error ; | |
116 | } ; | |
117 | ||
118 | if ((err = snd_pcm_hw_params_set_buffer_size_near (alsa_out->dev, hw_params, &alsa_buffer_frames)) < 0) | |
119 | { fprintf (stderr, "cannot set buffer size (%s)\n", snd_strerror (err)) ; | |
120 | goto catch_error ; | |
121 | } ; | |
122 | ||
123 | if ((err = snd_pcm_hw_params_set_period_size_near (alsa_out->dev, hw_params, &alsa_period_size, 0)) < 0) | |
124 | { fprintf (stderr, "cannot set period size (%s)\n", snd_strerror (err)) ; | |
125 | goto catch_error ; | |
126 | } ; | |
127 | ||
128 | if ((err = snd_pcm_hw_params (alsa_out->dev, hw_params)) < 0) | |
129 | { fprintf (stderr, "cannot set parameters (%s)\n", snd_strerror (err)) ; | |
130 | goto catch_error ; | |
131 | } ; | |
132 | ||
133 | /* extra check: if we have only one period, this code won't work */ | |
134 | snd_pcm_hw_params_get_period_size (hw_params, &alsa_period_size, 0) ; | |
135 | snd_pcm_hw_params_get_buffer_size (hw_params, &buffer_size) ; | |
136 | if (alsa_period_size == buffer_size) | |
137 | { fprintf (stderr, "Can't use period equal to buffer size (%lu == %lu)", alsa_period_size, buffer_size) ; | |
138 | goto catch_error ; | |
139 | } ; | |
140 | ||
141 | snd_pcm_hw_params_free (hw_params) ; | |
142 | ||
143 | if ((err = snd_pcm_sw_params_malloc (&sw_params)) != 0) | |
144 | { fprintf (stderr, "%s: snd_pcm_sw_params_malloc: %s", __func__, snd_strerror (err)) ; | |
145 | goto catch_error ; | |
146 | } ; | |
147 | ||
148 | if ((err = snd_pcm_sw_params_current (alsa_out->dev, sw_params)) != 0) | |
149 | { fprintf (stderr, "%s: snd_pcm_sw_params_current: %s", __func__, snd_strerror (err)) ; | |
150 | goto catch_error ; | |
151 | } ; | |
152 | ||
153 | /* note: set start threshold to delay start until the ring buffer is full */ | |
154 | snd_pcm_sw_params_current (alsa_out->dev, sw_params) ; | |
155 | ||
156 | if ((err = snd_pcm_sw_params_set_start_threshold (alsa_out->dev, sw_params, buffer_size)) < 0) | |
157 | { fprintf (stderr, "cannot set start threshold (%s)\n", snd_strerror (err)) ; | |
158 | goto catch_error ; | |
159 | } ; | |
160 | ||
161 | if ((err = snd_pcm_sw_params (alsa_out->dev, sw_params)) != 0) | |
162 | { fprintf (stderr, "%s: snd_pcm_sw_params: %s", __func__, snd_strerror (err)) ; | |
163 | goto catch_error ; | |
164 | } ; | |
165 | ||
166 | snd_pcm_sw_params_free (sw_params) ; | |
167 | ||
168 | snd_pcm_reset (alsa_out->dev) ; | |
169 | ||
170 | catch_error : | |
171 | ||
172 | if (err < 0 && alsa_out->dev != NULL) | |
173 | { snd_pcm_close (alsa_out->dev) ; | |
174 | return NULL ; | |
175 | } ; | |
176 | ||
177 | return (AUDIO_OUT *) alsa_out ; | |
178 | } /* alsa_open */ | |
179 | ||
180 | static void | |
181 | alsa_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) | |
182 | { static float buffer [BUFFER_LEN] ; | |
183 | ALSA_AUDIO_OUT *alsa_out ; | |
184 | int read_frames ; | |
185 | ||
186 | if ((alsa_out = (ALSA_AUDIO_OUT*) audio_out) == NULL) | |
187 | { printf ("alsa_close : AUDIO_OUT is NULL.\n") ; | |
188 | return ; | |
189 | } ; | |
190 | ||
191 | if (alsa_out->magic != ALSA_MAGIC) | |
192 | { printf ("alsa_close : Bad magic number.\n") ; | |
193 | return ; | |
194 | } ; | |
195 | ||
196 | while ((read_frames = callback (callback_data, buffer, BUFFER_LEN / alsa_out->channels))) | |
197 | alsa_write_float (alsa_out->dev, buffer, read_frames, alsa_out->channels) ; | |
198 | ||
199 | return ; | |
200 | } /* alsa_play */ | |
201 | ||
202 | static int | |
203 | alsa_write_float (snd_pcm_t *alsa_dev, float *data, int frames, int channels) | |
204 | { static int epipe_count = 0 ; | |
205 | ||
206 | int total = 0 ; | |
207 | int retval ; | |
208 | ||
209 | if (epipe_count > 0) | |
210 | epipe_count -- ; | |
211 | ||
212 | while (total < frames) | |
213 | { retval = snd_pcm_writei (alsa_dev, data + total * channels, frames - total) ; | |
214 | ||
215 | if (retval >= 0) | |
216 | { total += retval ; | |
217 | if (total == frames) | |
218 | return total ; | |
219 | ||
220 | continue ; | |
221 | } ; | |
222 | ||
223 | switch (retval) | |
224 | { case -EAGAIN : | |
225 | puts ("alsa_write_float: EAGAIN") ; | |
226 | continue ; | |
227 | break ; | |
228 | ||
229 | case -EPIPE : | |
230 | if (epipe_count > 0) | |
231 | { printf ("alsa_write_float: EPIPE %d\n", epipe_count) ; | |
232 | if (epipe_count > 140) | |
233 | return retval ; | |
234 | } ; | |
235 | epipe_count += 100 ; | |
236 | ||
237 | #if 0 | |
238 | if (0) | |
239 | { snd_pcm_status_t *status ; | |
240 | ||
241 | snd_pcm_status_alloca (&status) ; | |
242 | if ((retval = snd_pcm_status (alsa_dev, status)) < 0) | |
243 | fprintf (stderr, "alsa_out: xrun. can't determine length\n") ; | |
244 | else if (snd_pcm_status_get_state (status) == SND_PCM_STATE_XRUN) | |
245 | { struct timeval now, diff, tstamp ; | |
246 | ||
247 | gettimeofday (&now, 0) ; | |
248 | snd_pcm_status_get_trigger_tstamp (status, &tstamp) ; | |
249 | timersub (&now, &tstamp, &diff) ; | |
250 | ||
251 | fprintf (stderr, "alsa_write_float xrun: of at least %.3f msecs. resetting stream\n", | |
252 | diff.tv_sec * 1000 + diff.tv_usec / 1000.0) ; | |
253 | } | |
254 | else | |
255 | fprintf (stderr, "alsa_write_float: xrun. can't determine length\n") ; | |
256 | } ; | |
257 | #endif | |
258 | ||
259 | snd_pcm_prepare (alsa_dev) ; | |
260 | break ; | |
261 | ||
262 | case -EBADFD : | |
263 | fprintf (stderr, "alsa_write_float: Bad PCM state.n") ; | |
264 | return 0 ; | |
265 | break ; | |
266 | ||
267 | case -ESTRPIPE : | |
268 | fprintf (stderr, "alsa_write_float: Suspend event.n") ; | |
269 | return 0 ; | |
270 | break ; | |
271 | ||
272 | case -EIO : | |
273 | puts ("alsa_write_float: EIO") ; | |
274 | return 0 ; | |
275 | ||
276 | default : | |
277 | fprintf (stderr, "alsa_write_float: retval = %d\n", retval) ; | |
278 | return 0 ; | |
279 | break ; | |
280 | } ; /* switch */ | |
281 | } ; /* while */ | |
282 | ||
283 | return total ; | |
284 | } /* alsa_write_float */ | |
285 | ||
286 | static void | |
287 | alsa_close (AUDIO_OUT *audio_out) | |
288 | { ALSA_AUDIO_OUT *alsa_out ; | |
289 | ||
290 | if ((alsa_out = (ALSA_AUDIO_OUT*) audio_out) == NULL) | |
291 | { printf ("alsa_close : AUDIO_OUT is NULL.\n") ; | |
292 | return ; | |
293 | } ; | |
294 | ||
295 | if (alsa_out->magic != ALSA_MAGIC) | |
296 | { printf ("alsa_close : Bad magic number.\n") ; | |
297 | return ; | |
298 | } ; | |
299 | ||
300 | memset (alsa_out, 0, sizeof (ALSA_AUDIO_OUT)) ; | |
301 | ||
302 | free (alsa_out) ; | |
303 | ||
304 | return ; | |
305 | } /* alsa_close */ | |
306 | ||
307 | #endif /* HAVE_ALSA_ASOUNDLIB_H */ | |
308 | ||
309 | #include <fcntl.h> | |
310 | #include <sys/ioctl.h> | |
311 | #include <sys/soundcard.h> | |
312 | ||
313 | #define OSS_MAGIC MAKE_MAGIC ('L', 'i', 'n', 'u', 'x', 'O', 'S', 'S') | |
314 | ||
315 | typedef struct | |
316 | { int magic ; | |
317 | int fd ; | |
318 | int channels ; | |
319 | } OSS_AUDIO_OUT ; | |
320 | ||
321 | static AUDIO_OUT *opensoundsys_open (int channels, int samplerate) ; | |
322 | static void opensoundsys_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) ; | |
323 | static void opensoundsys_close (AUDIO_OUT *audio_out) ; | |
324 | ||
325 | ||
326 | static AUDIO_OUT * | |
327 | opensoundsys_open (int channels, int samplerate) | |
328 | { OSS_AUDIO_OUT *opensoundsys_out ; | |
329 | int stereo, fmt, error ; | |
330 | ||
331 | if ((opensoundsys_out = calloc (1, sizeof (OSS_AUDIO_OUT))) == NULL) | |
332 | { perror ("opensoundsys_open : malloc ") ; | |
333 | exit (1) ; | |
334 | } ; | |
335 | ||
336 | opensoundsys_out->magic = OSS_MAGIC ; | |
337 | opensoundsys_out->channels = channels ; | |
338 | ||
339 | if ((opensoundsys_out->fd = open ("/dev/dsp", O_WRONLY, 0)) == -1) | |
340 | { perror ("opensoundsys_open : open ") ; | |
341 | exit (1) ; | |
342 | } ; | |
343 | ||
344 | stereo = 0 ; | |
345 | if (ioctl (opensoundsys_out->fd, SNDCTL_DSP_STEREO, &stereo) == -1) | |
346 | { /* Fatal error */ | |
347 | perror ("opensoundsys_open : stereo ") ; | |
348 | exit (1) ; | |
349 | } ; | |
350 | ||
351 | if (ioctl (opensoundsys_out->fd, SNDCTL_DSP_RESET, 0)) | |
352 | { perror ("opensoundsys_open : reset ") ; | |
353 | exit (1) ; | |
354 | } ; | |
355 | ||
356 | fmt = CPU_IS_BIG_ENDIAN ? AFMT_S16_BE : AFMT_S16_LE ; | |
357 | if (ioctl (opensoundsys_out->fd, SNDCTL_DSP_SETFMT, &fmt) != 0) | |
358 | { perror ("opensoundsys_open_dsp_device : set format ") ; | |
359 | exit (1) ; | |
360 | } ; | |
361 | ||
362 | if ((error = ioctl (opensoundsys_out->fd, SNDCTL_DSP_CHANNELS, &channels)) != 0) | |
363 | { perror ("opensoundsys_open : channels ") ; | |
364 | exit (1) ; | |
365 | } ; | |
366 | ||
367 | if ((error = ioctl (opensoundsys_out->fd, SNDCTL_DSP_SPEED, &samplerate)) != 0) | |
368 | { perror ("opensoundsys_open : sample rate ") ; | |
369 | exit (1) ; | |
370 | } ; | |
371 | ||
372 | if ((error = ioctl (opensoundsys_out->fd, SNDCTL_DSP_SYNC, 0)) != 0) | |
373 | { perror ("opensoundsys_open : sync ") ; | |
374 | exit (1) ; | |
375 | } ; | |
376 | ||
377 | return (AUDIO_OUT*) opensoundsys_out ; | |
378 | } /* opensoundsys_open */ | |
379 | ||
380 | static void | |
381 | opensoundsys_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) | |
382 | { OSS_AUDIO_OUT *opensoundsys_out ; | |
383 | static float float_buffer [BUFFER_LEN] ; | |
384 | static short buffer [BUFFER_LEN] ; | |
385 | int k, read_frames ; | |
386 | ||
387 | if ((opensoundsys_out = (OSS_AUDIO_OUT*) audio_out) == NULL) | |
388 | { printf ("opensoundsys_play : AUDIO_OUT is NULL.\n") ; | |
389 | return ; | |
390 | } ; | |
391 | ||
392 | if (opensoundsys_out->magic != OSS_MAGIC) | |
393 | { printf ("opensoundsys_play : Bad magic number.\n") ; | |
394 | return ; | |
395 | } ; | |
396 | ||
397 | while ((read_frames = callback (callback_data, float_buffer, BUFFER_LEN / opensoundsys_out->channels))) | |
398 | { for (k = 0 ; k < read_frames * opensoundsys_out->channels ; k++) | |
399 | buffer [k] = lrint (32767.0 * float_buffer [k]) ; | |
400 | (void) write (opensoundsys_out->fd, buffer, read_frames * opensoundsys_out->channels * sizeof (short)) ; | |
401 | } ; | |
402 | ||
403 | return ; | |
404 | } /* opensoundsys_play */ | |
405 | ||
406 | static void | |
407 | opensoundsys_close (AUDIO_OUT *audio_out) | |
408 | { OSS_AUDIO_OUT *opensoundsys_out ; | |
409 | ||
410 | if ((opensoundsys_out = (OSS_AUDIO_OUT*) audio_out) == NULL) | |
411 | { printf ("opensoundsys_close : AUDIO_OUT is NULL.\n") ; | |
412 | return ; | |
413 | } ; | |
414 | ||
415 | if (opensoundsys_out->magic != OSS_MAGIC) | |
416 | { printf ("opensoundsys_close : Bad magic number.\n") ; | |
417 | return ; | |
418 | } ; | |
419 | ||
420 | memset (opensoundsys_out, 0, sizeof (OSS_AUDIO_OUT)) ; | |
421 | ||
422 | free (opensoundsys_out) ; | |
423 | ||
424 | return ; | |
425 | } /* opensoundsys_close */ | |
426 | ||
427 | #endif /* __linux__ */ | |
428 | ||
429 | /*------------------------------------------------------------------------------ | |
430 | ** Mac OS X functions for playing a sound. | |
431 | */ | |
432 | ||
433 | #if (defined (__MACH__) && defined (__APPLE__)) /* MacOSX */ | |
434 | ||
435 | #include <Carbon.h> | |
436 | #include <CoreAudio/AudioHardware.h> | |
437 | ||
438 | #define MACOSX_MAGIC MAKE_MAGIC ('M', 'a', 'c', ' ', 'O', 'S', ' ', 'X') | |
439 | ||
440 | typedef struct | |
441 | { int magic ; | |
442 | AudioStreamBasicDescription format ; | |
443 | ||
444 | UInt32 buf_size ; | |
445 | AudioDeviceID device ; | |
446 | ||
447 | int channels ; | |
448 | int samplerate ; | |
449 | int buffer_size ; | |
450 | int done_playing ; | |
451 | ||
452 | get_audio_callback_t callback ; | |
453 | ||
454 | void *callback_data ; | |
455 | } MACOSX_AUDIO_OUT ; | |
456 | ||
457 | static AUDIO_OUT *macosx_open (int channels, int samplerate) ; | |
458 | static void macosx_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) ; | |
459 | static void macosx_close (AUDIO_OUT *audio_out) ; | |
460 | ||
461 | static OSStatus | |
462 | macosx_audio_out_callback (AudioDeviceID device, const AudioTimeStamp* current_time, | |
463 | const AudioBufferList* data_in, const AudioTimeStamp* time_in, | |
464 | AudioBufferList* data_out, const AudioTimeStamp* time_out, void* client_data) ; | |
465 | ||
466 | ||
467 | static AUDIO_OUT * | |
468 | macosx_open (int channels, int samplerate) | |
469 | { MACOSX_AUDIO_OUT *macosx_out ; | |
470 | OSStatus err ; | |
471 | size_t count ; | |
472 | ||
473 | if ((macosx_out = calloc (1, sizeof (MACOSX_AUDIO_OUT))) == NULL) | |
474 | { perror ("macosx_open : malloc ") ; | |
475 | exit (1) ; | |
476 | } ; | |
477 | ||
478 | macosx_out->magic = MACOSX_MAGIC ; | |
479 | macosx_out->channels = channels ; | |
480 | macosx_out->samplerate = samplerate ; | |
481 | ||
482 | macosx_out->device = kAudioDeviceUnknown ; | |
483 | ||
484 | /* get the default output device for the HAL */ | |
485 | count = sizeof (AudioDeviceID) ; | |
486 | if ((err = AudioHardwareGetProperty (kAudioHardwarePropertyDefaultOutputDevice, | |
487 | &count, (void *) &(macosx_out->device))) != noErr) | |
488 | { printf ("AudioHardwareGetProperty failed.\n") ; | |
489 | free (macosx_out) ; | |
490 | return NULL ; | |
491 | } ; | |
492 | ||
493 | /* get the buffersize that the default device uses for IO */ | |
494 | count = sizeof (UInt32) ; | |
495 | if ((err = AudioDeviceGetProperty (macosx_out->device, 0, false, kAudioDevicePropertyBufferSize, | |
496 | &count, &(macosx_out->buffer_size))) != noErr) | |
497 | { printf ("AudioDeviceGetProperty (AudioDeviceGetProperty) failed.\n") ; | |
498 | free (macosx_out) ; | |
499 | return NULL ; | |
500 | } ; | |
501 | ||
502 | /* get a description of the data format used by the default device */ | |
503 | count = sizeof (AudioStreamBasicDescription) ; | |
504 | if ((err = AudioDeviceGetProperty (macosx_out->device, 0, false, kAudioDevicePropertyStreamFormat, | |
505 | &count, &(macosx_out->format))) != noErr) | |
506 | { printf ("AudioDeviceGetProperty (kAudioDevicePropertyStreamFormat) failed.\n") ; | |
507 | free (macosx_out) ; | |
508 | return NULL ; | |
509 | } ; | |
510 | ||
511 | macosx_out->format.mSampleRate = samplerate ; | |
512 | macosx_out->format.mChannelsPerFrame = channels ; | |
513 | ||
514 | if ((err = AudioDeviceSetProperty (macosx_out->device, NULL, 0, false, kAudioDevicePropertyStreamFormat, | |
515 | sizeof (AudioStreamBasicDescription), &(macosx_out->format))) != noErr) | |
516 | { printf ("AudioDeviceSetProperty (kAudioDevicePropertyStreamFormat) failed.\n") ; | |
517 | free (macosx_out) ; | |
518 | return NULL ; | |
519 | } ; | |
520 | ||
521 | /* we want linear pcm */ | |
522 | if (macosx_out->format.mFormatID != kAudioFormatLinearPCM) | |
523 | { free (macosx_out) ; | |
524 | return NULL ; | |
525 | } ; | |
526 | ||
527 | macosx_out->done_playing = 0 ; | |
528 | ||
529 | /* Fire off the device. */ | |
530 | if ((err = AudioDeviceAddIOProc (macosx_out->device, macosx_audio_out_callback, | |
531 | (void *) macosx_out)) != noErr) | |
532 | { printf ("AudioDeviceAddIOProc failed.\n") ; | |
533 | free (macosx_out) ; | |
534 | return NULL ; | |
535 | } ; | |
536 | ||
537 | return (MACOSX_AUDIO_OUT *) macosx_out ; | |
538 | } /* macosx_open */ | |
539 | ||
540 | static void | |
541 | macosx_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) | |
542 | { MACOSX_AUDIO_OUT *macosx_out ; | |
543 | OSStatus err ; | |
544 | ||
545 | if ((macosx_out = (MACOSX_AUDIO_OUT*) audio_out) == NULL) | |
546 | { printf ("macosx_play : AUDIO_OUT is NULL.\n") ; | |
547 | return ; | |
548 | } ; | |
549 | ||
550 | if (macosx_out->magic != MACOSX_MAGIC) | |
551 | { printf ("macosx_play : Bad magic number.\n") ; | |
552 | return ; | |
553 | } ; | |
554 | ||
555 | /* Set the callback function and callback data. */ | |
556 | macosx_out->callback = callback ; | |
557 | macosx_out->callback_data = callback_data ; | |
558 | ||
559 | err = AudioDeviceStart (macosx_out->device, macosx_audio_out_callback) ; | |
560 | if (err != noErr) | |
561 | printf ("AudioDeviceStart failed.\n") ; | |
562 | ||
563 | while (macosx_out->done_playing == SF_FALSE) | |
564 | usleep (10 * 1000) ; /* 10 000 milliseconds. */ | |
565 | ||
566 | return ; | |
567 | } /* macosx_play */ | |
568 | ||
569 | static void | |
570 | macosx_close (AUDIO_OUT *audio_out) | |
571 | { MACOSX_AUDIO_OUT *macosx_out ; | |
572 | OSStatus err ; | |
573 | ||
574 | if ((macosx_out = (MACOSX_AUDIO_OUT*) audio_out) == NULL) | |
575 | { printf ("macosx_close : AUDIO_OUT is NULL.\n") ; | |
576 | return ; | |
577 | } ; | |
578 | ||
579 | if (macosx_out->magic != MACOSX_MAGIC) | |
580 | { printf ("macosx_close : Bad magic number.\n") ; | |
581 | return ; | |
582 | } ; | |
583 | ||
584 | ||
585 | if ((err = AudioDeviceStop (macosx_out->device, macosx_audio_out_callback)) != noErr) | |
586 | { printf ("AudioDeviceStop failed.\n") ; | |
587 | return ; | |
588 | } ; | |
589 | ||
590 | err = AudioDeviceRemoveIOProc (macosx_out->device, macosx_audio_out_callback) ; | |
591 | if (err != noErr) | |
592 | { printf ("AudioDeviceRemoveIOProc failed.\n") ; | |
593 | return ; | |
594 | } ; | |
595 | ||
596 | } /* macosx_close */ | |
597 | ||
598 | static OSStatus | |
599 | macosx_audio_out_callback (AudioDeviceID device, const AudioTimeStamp* current_time, | |
600 | const AudioBufferList* data_in, const AudioTimeStamp* time_in, | |
601 | AudioBufferList* data_out, const AudioTimeStamp* time_out, void* client_data) | |
602 | { MACOSX_AUDIO_OUT *macosx_out ; | |
603 | int k, size, frame_count, read_count ; | |
604 | float *buffer ; | |
605 | ||
606 | if ((macosx_out = (MACOSX_AUDIO_OUT*) client_data) == NULL) | |
607 | { printf ("macosx_play : AUDIO_OUT is NULL.\n") ; | |
608 | return 42 ; | |
609 | } ; | |
610 | ||
611 | if (macosx_out->magic != MACOSX_MAGIC) | |
612 | { printf ("macosx_play : Bad magic number.\n") ; | |
613 | return 42 ; | |
614 | } ; | |
615 | ||
616 | size = data_out->mBuffers [0].mDataByteSize ; | |
617 | frame_count = size / sizeof (float) / macosx_out->channels ; | |
618 | ||
619 | buffer = (float*) data_out->mBuffers [0].mData ; | |
620 | ||
621 | read_count = macosx_out->callback (macosx_out->callback_data, buffer, frame_count) ; | |
622 | ||
623 | if (read_count < frame_count) | |
624 | { memset (&(buffer [read_count]), 0, (frame_count - read_count) * sizeof (float)) ; | |
625 | macosx_out->done_playing = 1 ; | |
626 | } ; | |
627 | ||
628 | return noErr ; | |
629 | } /* macosx_audio_out_callback */ | |
630 | ||
631 | #endif /* MacOSX */ | |
632 | ||
633 | ||
634 | /*------------------------------------------------------------------------------ | |
635 | ** Win32 functions for playing a sound. | |
636 | ** | |
637 | ** This API sucks. Its needlessly complicated and is *WAY* too loose with | |
638 | ** passing pointers arounf in integers and and using char* pointers to | |
639 | ** point to data instead of short*. It plain sucks! | |
640 | */ | |
641 | ||
642 | #if (defined (_WIN32) || defined (WIN32)) | |
643 | ||
644 | #include <windows.h> | |
645 | #include <mmsystem.h> | |
646 | ||
647 | #define WIN32_BUFFER_LEN (1<<15) | |
648 | #define WIN32_MAGIC MAKE_MAGIC ('W', 'i', 'n', '3', '2', 's', 'u', 'x') | |
649 | ||
650 | typedef struct | |
651 | { int magic ; | |
652 | ||
653 | HWAVEOUT hwave ; | |
654 | WAVEHDR whdr [2] ; | |
655 | ||
656 | HANDLE Event ; | |
657 | ||
658 | short short_buffer [WIN32_BUFFER_LEN / sizeof (short)] ; | |
659 | float float_buffer [WIN32_BUFFER_LEN / sizeof (short) / 2] ; | |
660 | ||
661 | int bufferlen, current ; | |
662 | ||
663 | int channels ; | |
664 | ||
665 | get_audio_callback_t callback ; | |
666 | ||
667 | void *callback_data ; | |
668 | } WIN32_AUDIO_OUT ; | |
669 | ||
670 | static AUDIO_OUT *win32_open (int channels, int samplerate) ; | |
671 | static void win32_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) ; | |
672 | static void win32_close (AUDIO_OUT *audio_out) ; | |
673 | ||
674 | static DWORD CALLBACK | |
675 | win32_audio_out_callback (HWAVEOUT hwave, UINT msg, DWORD data, DWORD param1, DWORD param2) ; | |
676 | ||
677 | static AUDIO_OUT* | |
678 | win32_open (int channels, int samplerate) | |
679 | { WIN32_AUDIO_OUT *win32_out ; | |
680 | ||
681 | WAVEFORMATEX wf ; | |
682 | int error ; | |
683 | ||
684 | if ((win32_out = calloc (1, sizeof (WIN32_AUDIO_OUT))) == NULL) | |
685 | { perror ("win32_open : malloc ") ; | |
686 | exit (1) ; | |
687 | } ; | |
688 | ||
689 | win32_out->magic = WIN32_MAGIC ; | |
690 | win32_out->channels = channels ; | |
691 | ||
692 | win32_out->current = 0 ; | |
693 | ||
694 | win32_out->Event = CreateEvent (0, FALSE, FALSE, 0) ; | |
695 | ||
696 | wf.nChannels = channels ; | |
697 | wf.nSamplesPerSec = samplerate ; | |
698 | wf.nBlockAlign = channels * sizeof (short) ; | |
699 | ||
700 | wf.wFormatTag = WAVE_FORMAT_PCM ; | |
701 | wf.cbSize = 0 ; | |
702 | wf.wBitsPerSample = 16 ; | |
703 | wf.nAvgBytesPerSec = wf.nBlockAlign * wf.nSamplesPerSec ; | |
704 | ||
705 | error = waveOutOpen (&(win32_out->hwave), WAVE_MAPPER, &wf, (DWORD) win32_audio_out_callback, | |
706 | (DWORD) win32_out, CALLBACK_FUNCTION) ; | |
707 | if (error) | |
708 | { puts ("waveOutOpen failed.") ; | |
709 | free (win32_out) ; | |
710 | return NULL ; | |
711 | } ; | |
712 | ||
713 | waveOutPause (win32_out->hwave) ; | |
714 | ||
715 | return (WIN32_AUDIO_OUT *) win32_out ; | |
716 | } /* win32_open */ | |
717 | ||
718 | static void | |
719 | win32_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) | |
720 | { WIN32_AUDIO_OUT *win32_out ; | |
721 | int error ; | |
722 | ||
723 | if ((win32_out = (WIN32_AUDIO_OUT*) audio_out) == NULL) | |
724 | { printf ("win32_play : AUDIO_OUT is NULL.\n") ; | |
725 | return ; | |
726 | } ; | |
727 | ||
728 | if (win32_out->magic != WIN32_MAGIC) | |
729 | { printf ("win32_play : Bad magic number (%d %d).\n", win32_out->magic, WIN32_MAGIC) ; | |
730 | return ; | |
731 | } ; | |
732 | ||
733 | /* Set the callback function and callback data. */ | |
734 | win32_out->callback = callback ; | |
735 | win32_out->callback_data = callback_data ; | |
736 | ||
737 | win32_out->whdr [0].lpData = (char*) win32_out->short_buffer ; | |
738 | win32_out->whdr [1].lpData = ((char*) win32_out->short_buffer) + sizeof (win32_out->short_buffer) / 2 ; | |
739 | ||
740 | win32_out->whdr [0].dwBufferLength = sizeof (win32_out->short_buffer) / 2 ; | |
741 | win32_out->whdr [1].dwBufferLength = sizeof (win32_out->short_buffer) / 2 ; | |
742 | ||
743 | win32_out->bufferlen = sizeof (win32_out->short_buffer) / 2 / sizeof (short) ; | |
744 | ||
745 | /* Prepare the WAVEHDRs */ | |
746 | if ((error = waveOutPrepareHeader (win32_out->hwave, &(win32_out->whdr [0]), sizeof (WAVEHDR)))) | |
747 | { printf ("waveOutPrepareHeader [0] failed : %08X\n", error) ; | |
748 | waveOutClose (win32_out->hwave) ; | |
749 | return ; | |
750 | } ; | |
751 | ||
752 | if ((error = waveOutPrepareHeader (win32_out->hwave, &(win32_out->whdr [1]), sizeof (WAVEHDR)))) | |
753 | { printf ("waveOutPrepareHeader [1] failed : %08X\n", error) ; | |
754 | waveOutUnprepareHeader (win32_out->hwave, &(win32_out->whdr [0]), sizeof (WAVEHDR)) ; | |
755 | waveOutClose (win32_out->hwave) ; | |
756 | return ; | |
757 | } ; | |
758 | ||
759 | waveOutRestart (win32_out->hwave) ; | |
760 | ||
761 | /* Fake 2 calls to the callback function to queue up enough audio. */ | |
762 | win32_audio_out_callback (0, MM_WOM_DONE, (DWORD) win32_out, 0, 0) ; | |
763 | win32_audio_out_callback (0, MM_WOM_DONE, (DWORD) win32_out, 0, 0) ; | |
764 | ||
765 | /* Wait for playback to finish. The callback notifies us when all | |
766 | ** wave data has been played. | |
767 | */ | |
768 | WaitForSingleObject (win32_out->Event, INFINITE) ; | |
769 | ||
770 | waveOutPause (win32_out->hwave) ; | |
771 | waveOutReset (win32_out->hwave) ; | |
772 | ||
773 | waveOutUnprepareHeader (win32_out->hwave, &(win32_out->whdr [0]), sizeof (WAVEHDR)) ; | |
774 | waveOutUnprepareHeader (win32_out->hwave, &(win32_out->whdr [1]), sizeof (WAVEHDR)) ; | |
775 | ||
776 | waveOutClose (win32_out->hwave) ; | |
777 | win32_out->hwave = 0 ; | |
778 | ||
779 | return ; | |
780 | } /* win32_play */ | |
781 | ||
782 | static void | |
783 | win32_close (AUDIO_OUT *audio_out) | |
784 | { WIN32_AUDIO_OUT *win32_out ; | |
785 | ||
786 | if ((win32_out = (WIN32_AUDIO_OUT*) audio_out) == NULL) | |
787 | { printf ("win32_close : AUDIO_OUT is NULL.\n") ; | |
788 | return ; | |
789 | } ; | |
790 | ||
791 | if (win32_out->magic != WIN32_MAGIC) | |
792 | { printf ("win32_close : Bad magic number.\n") ; | |
793 | return ; | |
794 | } ; | |
795 | ||
796 | memset (win32_out, 0, sizeof (WIN32_AUDIO_OUT)) ; | |
797 | ||
798 | free (win32_out) ; | |
799 | } /* win32_close */ | |
800 | ||
801 | static DWORD CALLBACK | |
802 | win32_audio_out_callback (HWAVEOUT hwave, UINT msg, DWORD data, DWORD param1, DWORD param2) | |
803 | { WIN32_AUDIO_OUT *win32_out ; | |
804 | int read_count, frame_count, k ; | |
805 | short *sptr ; | |
806 | ||
807 | /* | |
808 | ** I consider this technique of passing a pointer via an integer as | |
809 | ** fundamentally broken but thats the way microsoft has defined the | |
810 | ** interface. | |
811 | */ | |
812 | if ((win32_out = (WIN32_AUDIO_OUT*) data) == NULL) | |
813 | { printf ("win32_audio_out_callback : AUDIO_OUT is NULL.\n") ; | |
814 | return 1 ; | |
815 | } ; | |
816 | ||
817 | if (win32_out->magic != WIN32_MAGIC) | |
818 | { printf ("win32_audio_out_callback : Bad magic number (%d %d).\n", win32_out->magic, WIN32_MAGIC) ; | |
819 | return 1 ; | |
820 | } ; | |
821 | ||
822 | if (msg != MM_WOM_DONE) | |
823 | return 0 ; | |
824 | ||
825 | /* Do the actual audio. */ | |
826 | sample_count = win32_out->bufferlen ; | |
827 | frame_count = sample_count / win32_out->channels ; | |
828 | ||
829 | read_count = win32_out->callback (win32_out->callback_data, win32_out->float_buffer, frame_count) ; | |
830 | ||
831 | sptr = (short*) win32_out->whdr [win32_out->current].lpData ; | |
832 | ||
833 | for (k = 0 ; k < read_count ; k++) | |
834 | sptr [k] = lrint (32767.0 * win32_out->float_buffer [k]) ; | |
835 | ||
836 | if (read_count > 0) | |
837 | { /* Fix buffer length is only a partial block. */ | |
838 | if (read_count * sizeof (short) < win32_out->bufferlen) | |
839 | win32_out->whdr [win32_out->current].dwBufferLength = read_count * sizeof (short) ; | |
840 | ||
841 | /* Queue the WAVEHDR */ | |
842 | waveOutWrite (win32_out->hwave, (LPWAVEHDR) &(win32_out->whdr [win32_out->current]), sizeof (WAVEHDR)) ; | |
843 | } | |
844 | else | |
845 | { /* Stop playback */ | |
846 | waveOutPause (win32_out->hwave) ; | |
847 | ||
848 | SetEvent (win32_out->Event) ; | |
849 | } ; | |
850 | ||
851 | win32_out->current = (win32_out->current + 1) % 2 ; | |
852 | ||
853 | return 0 ; | |
854 | } /* win32_audio_out_callback */ | |
855 | ||
856 | #endif /* Win32 */ | |
857 | ||
858 | /*------------------------------------------------------------------------------ | |
859 | ** Solaris. | |
860 | */ | |
861 | ||
862 | #if (defined (sun) && defined (unix)) /* ie Solaris */ | |
863 | ||
864 | #include <fcntl.h> | |
865 | #include <sys/ioctl.h> | |
866 | #include <sys/audioio.h> | |
867 | ||
868 | #define SOLARIS_MAGIC MAKE_MAGIC ('S', 'o', 'l', 'a', 'r', 'i', 's', ' ') | |
869 | ||
870 | typedef struct | |
871 | { int magic ; | |
872 | int fd ; | |
873 | int channels ; | |
874 | int samplerate ; | |
875 | } SOLARIS_AUDIO_OUT ; | |
876 | ||
877 | static AUDIO_OUT *solaris_open (int channels, int samplerate) ; | |
878 | static void solaris_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) ; | |
879 | static void solaris_close (AUDIO_OUT *audio_out) ; | |
880 | ||
881 | static AUDIO_OUT * | |
882 | solaris_open (int channels, int samplerate) | |
883 | { SOLARIS_AUDIO_OUT *solaris_out ; | |
884 | audio_info_t audio_info ; | |
885 | int error ; | |
886 | ||
887 | if ((solaris_out = calloc (1, sizeof (SOLARIS_AUDIO_OUT))) == NULL) | |
888 | { perror ("solaris_open : malloc ") ; | |
889 | exit (1) ; | |
890 | } ; | |
891 | ||
892 | solaris_out->magic = SOLARIS_MAGIC ; | |
893 | solaris_out->channels = channels ; | |
894 | solaris_out->samplerate = channels ; | |
895 | ||
896 | /* open the audio device - write only, non-blocking */ | |
897 | if ((solaris_out->fd = open ("/dev/audio", O_WRONLY | O_NONBLOCK)) < 0) | |
898 | { perror ("open (/dev/audio) failed") ; | |
899 | exit (1) ; | |
900 | } ; | |
901 | ||
902 | /* Retrive standard values. */ | |
903 | AUDIO_INITINFO (&audio_info) ; | |
904 | ||
905 | audio_info.play.sample_rate = samplerate ; | |
906 | audio_info.play.channels = channels ; | |
907 | audio_info.play.precision = 16 ; | |
908 | audio_info.play.encoding = AUDIO_ENCODING_LINEAR ; | |
909 | audio_info.play.gain = AUDIO_MAX_GAIN ; | |
910 | audio_info.play.balance = AUDIO_MID_BALANCE ; | |
911 | ||
912 | if ((error = ioctl (solaris_out->fd, AUDIO_SETINFO, &audio_info))) | |
913 | { perror ("ioctl (AUDIO_SETINFO) failed") ; | |
914 | exit (1) ; | |
915 | } ; | |
916 | ||
917 | return (AUDIO_OUT*) solaris_out ; | |
918 | } /* solaris_open */ | |
919 | ||
920 | static void | |
921 | solaris_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) | |
922 | { SOLARIS_AUDIO_OUT *solaris_out ; | |
923 | static float float_buffer [BUFFER_LEN] ; | |
924 | static short buffer [BUFFER_LEN] ; | |
925 | int k, read_frames ; | |
926 | ||
927 | if ((solaris_out = (SOLARIS_AUDIO_OUT*) audio_out) == NULL) | |
928 | { printf ("solaris_play : AUDIO_OUT is NULL.\n") ; | |
929 | return ; | |
930 | } ; | |
931 | ||
932 | if (solaris_out->magic != SOLARIS_MAGIC) | |
933 | { printf ("solaris_play : Bad magic number.\n") ; | |
934 | return ; | |
935 | } ; | |
936 | ||
937 | while ((read_frames = callback (callback_data, float_buffer, BUFFER_LEN / solaris_out->channels))) | |
938 | { for (k = 0 ; k < read_frames * solaris_out->channels ; k++) | |
939 | buffer [k] = lrint (32767.0 * float_buffer [k]) ; | |
940 | write (solaris_out->fd, buffer, read_frames * solaris_out->channels * sizeof (short)) ; | |
941 | } ; | |
942 | ||
943 | return ; | |
944 | } /* solaris_play */ | |
945 | ||
946 | static void | |
947 | solaris_close (AUDIO_OUT *audio_out) | |
948 | { SOLARIS_AUDIO_OUT *solaris_out ; | |
949 | ||
950 | if ((solaris_out = (SOLARIS_AUDIO_OUT*) audio_out) == NULL) | |
951 | { printf ("solaris_close : AUDIO_OUT is NULL.\n") ; | |
952 | return ; | |
953 | } ; | |
954 | ||
955 | if (solaris_out->magic != SOLARIS_MAGIC) | |
956 | { printf ("solaris_close : Bad magic number.\n") ; | |
957 | return ; | |
958 | } ; | |
959 | ||
960 | memset (solaris_out, 0, sizeof (SOLARIS_AUDIO_OUT)) ; | |
961 | ||
962 | free (solaris_out) ; | |
963 | ||
964 | return ; | |
965 | } /* solaris_close */ | |
966 | ||
967 | #endif /* Solaris */ | |
968 | ||
969 | /*============================================================================== | |
970 | ** Main function. | |
971 | */ | |
972 | ||
973 | AUDIO_OUT * | |
974 | audio_open (int channels, int samplerate) | |
975 | { | |
976 | #if defined (__linux__) | |
977 | #if HAVE_ALSA_ASOUNDLIB_H | |
978 | if (access ("/proc/asound/cards", R_OK) == 0) | |
979 | return alsa_open (channels, samplerate) ; | |
980 | #endif | |
981 | return opensoundsys_open (channels, samplerate) ; | |
982 | #elif (defined (__MACH__) && defined (__APPLE__)) | |
983 | return macosx_open (channels, samplerate) ; | |
984 | #elif (defined (sun) && defined (unix)) | |
985 | return solaris_open (channels, samplerate) ; | |
986 | #elif (defined (_WIN32) || defined (WIN32)) | |
987 | return win32_open (channels, samplerate) ; | |
988 | #else | |
989 | #warning "*** Playing sound not yet supported on this platform." | |
990 | #warning "*** Please feel free to submit a patch." | |
991 | printf ("Error : Playing sound not yet supported on this platform.\n") ; | |
992 | return NULL ; | |
993 | #endif | |
994 | ||
995 | ||
996 | return NULL ; | |
997 | } /* audio_open */ | |
998 | ||
999 | void | |
1000 | audio_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) | |
1001 | { | |
1002 | ||
1003 | if (callback == NULL) | |
1004 | { printf ("Error : bad callback pointer.\n") ; | |
1005 | return ; | |
1006 | } ; | |
1007 | ||
1008 | if (audio_out == NULL) | |
1009 | { printf ("Error : bad audio_out pointer.\n") ; | |
1010 | return ; | |
1011 | } ; | |
1012 | ||
1013 | if (callback_data == NULL) | |
1014 | { printf ("Error : bad callback_data pointer.\n") ; | |
1015 | return ; | |
1016 | } ; | |
1017 | ||
1018 | #if defined (__linux__) | |
1019 | #if HAVE_ALSA_ASOUNDLIB_H | |
1020 | if (audio_out->magic == ALSA_MAGIC) | |
1021 | alsa_play (callback, audio_out, callback_data) ; | |
1022 | #endif | |
1023 | opensoundsys_play (callback, audio_out, callback_data) ; | |
1024 | #elif (defined (__MACH__) && defined (__APPLE__)) | |
1025 | macosx_play (callback, audio_out, callback_data) ; | |
1026 | #elif (defined (sun) && defined (unix)) | |
1027 | solaris_play (callback, audio_out, callback_data) ; | |
1028 | #elif (defined (_WIN32) || defined (WIN32)) | |
1029 | win32_play (callback, audio_out, callback_data) ; | |
1030 | #else | |
1031 | #warning "*** Playing sound not yet supported on this platform." | |
1032 | #warning "*** Please feel free to submit a patch." | |
1033 | printf ("Error : Playing sound not yet supported on this platform.\n") ; | |
1034 | return ; | |
1035 | #endif | |
1036 | ||
1037 | return ; | |
1038 | } /* audio_play */ | |
1039 | ||
1040 | void | |
1041 | audio_close (AUDIO_OUT *audio_out) | |
1042 | { | |
1043 | #if defined (__linux__) | |
1044 | #if HAVE_ALSA_ASOUNDLIB_H | |
1045 | if (audio_out->magic == ALSA_MAGIC) | |
1046 | alsa_close (audio_out) ; | |
1047 | #endif | |
1048 | opensoundsys_close (audio_out) ; | |
1049 | #elif (defined (__MACH__) && defined (__APPLE__)) | |
1050 | macosx_close (audio_out) ; | |
1051 | #elif (defined (sun) && defined (unix)) | |
1052 | solaris_close (audio_out) ; | |
1053 | #elif (defined (_WIN32) || defined (WIN32)) | |
1054 | win32_close (audio_out) ; | |
1055 | #else | |
1056 | #warning "*** Playing sound not yet supported on this platform." | |
1057 | #warning "*** Please feel free to submit a patch." | |
1058 | printf ("Error : Playing sound not yet supported on this platform.\n") ; | |
1059 | return ; | |
1060 | #endif | |
1061 | ||
1062 | return ; | |
1063 | } /* audio_close */ | |
1064 | ||
1065 | #else /* (HAVE_SNDFILE == 0) */ | |
1066 | ||
1067 | /* Do not have libsndfile installed so just return. */ | |
1068 | ||
1069 | AUDIO_OUT * | |
1070 | audio_open (int channels, int samplerate) | |
1071 | { | |
1072 | (void) channels ; | |
1073 | (void) samplerate ; | |
1074 | ||
1075 | return NULL ; | |
1076 | } /* audio_open */ | |
1077 | ||
1078 | void | |
1079 | audio_play (get_audio_callback_t callback, AUDIO_OUT *audio_out, void *callback_data) | |
1080 | { | |
1081 | (void) callback ; | |
1082 | (void) audio_out ; | |
1083 | (void) callback_data ; | |
1084 | ||
1085 | return ; | |
1086 | } /* audio_play */ | |
1087 | ||
1088 | void | |
1089 | audio_close (AUDIO_OUT *audio_out) | |
1090 | { | |
1091 | audio_out = audio_out ; | |
1092 | ||
1093 | return ; | |
1094 | } /* audio_close */ | |
1095 | ||
1096 | #endif /* HAVE_SNDFILE */ | |
1097 |