source: python/trunk/Modules/ossaudiodev.c@ 389

Last change on this file since 389 was 2, checked in by Yuri Dario, 15 years ago

Initial import for vendor code.
  • Property svn:eol-style set to native
File size: 32.0 KB
Line 
1/*
2 * ossaudiodev -- Python interface to the OSS (Open Sound System) API.
3 * This is the standard audio API for Linux and some
4 * flavours of BSD [XXX which ones?]; it is also available
5 * for a wide range of commercial Unices.
6 *
7 * Originally written by Peter Bosch, March 2000, as linuxaudiodev.
8 *
9 * Renamed to ossaudiodev and rearranged/revised/hacked up
10 * by Greg Ward <gward@python.net>, November 2002.
11 * Mixer interface by Nicholas FitzRoy-Dale <wzdd@lardcave.net>, Dec 2002.
12 *
13 * (c) 2000 Peter Bosch. All Rights Reserved.
14 * (c) 2002 Gregory P. Ward. All Rights Reserved.
15 * (c) 2002 Python Software Foundation. All Rights Reserved.
16 *
17 * XXX need a license statement
18 *
19 * $Id: ossaudiodev.c 64048 2008-06-09 04:58:54Z gregory.p.smith $
20 */
21
22#include "Python.h"
23#include "structmember.h"
24
25#ifdef HAVE_FCNTL_H
26#include <fcntl.h>
27#else
28#define O_RDONLY 00
29#define O_WRONLY 01
30#endif
31
32#include <sys/ioctl.h>
33#include <sys/soundcard.h>
34
35#if defined(linux)
36
37#ifndef HAVE_STDINT_H
38typedef unsigned long uint32_t;
39#endif
40
41#elif defined(__FreeBSD__)
42
43# ifndef SNDCTL_DSP_CHANNELS
44# define SNDCTL_DSP_CHANNELS SOUND_PCM_WRITE_CHANNELS
45# endif
46
47#endif
48
49typedef struct {
50 PyObject_HEAD
51 char *devicename; /* name of the device file */
52 int fd; /* file descriptor */
53 int mode; /* file mode (O_RDONLY, etc.) */
54 int icount; /* input count */
55 int ocount; /* output count */
56 uint32_t afmts; /* audio formats supported by hardware */
57} oss_audio_t;
58
59typedef struct {
60 PyObject_HEAD
61 int fd; /* The open mixer device */
62} oss_mixer_t;
63
64
65static PyTypeObject OSSAudioType;
66static PyTypeObject OSSMixerType;
67
68static PyObject *OSSAudioError;
69
70
71/* ----------------------------------------------------------------------
72 * DSP object initialization/deallocation
73 */
74
75static oss_audio_t *
76newossobject(PyObject *arg)
77{
78 oss_audio_t *self;
79 int fd, afmts, imode;
80 char *devicename = NULL;
81 char *mode = NULL;
82
83 /* Two ways to call open():
84 open(device, mode) (for consistency with builtin open())
85 open(mode) (for backwards compatibility)
86 because the *first* argument is optional, parsing args is
87 a wee bit tricky. */
88 if (!PyArg_ParseTuple(arg, "s|s:open", &devicename, &mode))
89 return NULL;
90 if (mode == NULL) { /* only one arg supplied */
91 mode = devicename;
92 devicename = NULL;
93 }
94
95 if (strcmp(mode, "r") == 0)
96 imode = O_RDONLY;
97 else if (strcmp(mode, "w") == 0)
98 imode = O_WRONLY;
99 else if (strcmp(mode, "rw") == 0)
100 imode = O_RDWR;
101 else {
102 PyErr_SetString(OSSAudioError, "mode must be 'r', 'w', or 'rw'");
103 return NULL;
104 }
105
106 /* Open the correct device: either the 'device' argument,
107 or the AUDIODEV environment variable, or "/dev/dsp". */
108 if (devicename == NULL) { /* called with one arg */
109 devicename = getenv("AUDIODEV");
110 if (devicename == NULL) /* $AUDIODEV not set */
111 devicename = "/dev/dsp";
112 }
113
114 /* Open with O_NONBLOCK to avoid hanging on devices that only allow
115 one open at a time. This does *not* affect later I/O; OSS
116 provides a special ioctl() for non-blocking read/write, which is
117 exposed via oss_nonblock() below. */
118 if ((fd = open(devicename, imode|O_NONBLOCK)) == -1) {
119 PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename);
120 return NULL;
121 }
122
123 /* And (try to) put it back in blocking mode so we get the
124 expected write() semantics. */
125 if (fcntl(fd, F_SETFL, 0) == -1) {
126 close(fd);
127 PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename);
128 return NULL;
129 }
130
131 if (ioctl(fd, SNDCTL_DSP_GETFMTS, &afmts) == -1) {
132 PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename);
133 return NULL;
134 }
135 /* Create and initialize the object */
136 if ((self = PyObject_New(oss_audio_t, &OSSAudioType)) == NULL) {
137 close(fd);
138 return NULL;
139 }
140 self->devicename = devicename;
141 self->fd = fd;
142 self->mode = imode;
143 self->icount = self->ocount = 0;
144 self->afmts = afmts;
145 return self;
146}
147
148static void
149oss_dealloc(oss_audio_t *self)
150{
151 /* if already closed, don't reclose it */
152 if (self->fd != -1)
153 close(self->fd);
154 PyObject_Del(self);
155}
156
157
158/* ----------------------------------------------------------------------
159 * Mixer object initialization/deallocation
160 */
161
162static oss_mixer_t *
163newossmixerobject(PyObject *arg)
164{
165 char *devicename = NULL;
166 int fd;
167 oss_mixer_t *self;
168
169 if (!PyArg_ParseTuple(arg, "|s", &devicename)) {
170 return NULL;
171 }
172
173 if (devicename == NULL) {
174 devicename = getenv("MIXERDEV");
175 if (devicename == NULL) /* MIXERDEV not set */
176 devicename = "/dev/mixer";
177 }
178
179 if ((fd = open(devicename, O_RDWR)) == -1) {
180 PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename);
181 return NULL;
182 }
183
184 if ((self = PyObject_New(oss_mixer_t, &OSSMixerType)) == NULL) {
185 close(fd);
186 return NULL;
187 }
188
189 self->fd = fd;
190
191 return self;
192}
193
194static void
195oss_mixer_dealloc(oss_mixer_t *self)
196{
197 /* if already closed, don't reclose it */
198 if (self->fd != -1)
199 close(self->fd);
200 PyObject_Del(self);
201}
202
203
204/* Methods to wrap the OSS ioctls. The calling convention is pretty
205 simple:
206 nonblock() -> ioctl(fd, SNDCTL_DSP_NONBLOCK)
207 fmt = setfmt(fmt) -> ioctl(fd, SNDCTL_DSP_SETFMT, &fmt)
208 etc.
209*/
210
211
212/* ----------------------------------------------------------------------
213 * Helper functions
214 */
215
216/* _do_ioctl_1() is a private helper function used for the OSS ioctls --
217 SNDCTL_DSP_{SETFMT,CHANNELS,SPEED} -- that that are called from C
218 like this:
219 ioctl(fd, SNDCTL_DSP_cmd, &arg)
220
221 where arg is the value to set, and on return the driver sets arg to
222 the value that was actually set. Mapping this to Python is obvious:
223 arg = dsp.xxx(arg)
224*/
225static PyObject *
226_do_ioctl_1(int fd, PyObject *args, char *fname, int cmd)
227{
228 char argfmt[33] = "i:";
229 int arg;
230
231 assert(strlen(fname) <= 30);
232 strcat(argfmt, fname);
233 if (!PyArg_ParseTuple(args, argfmt, &arg))
234 return NULL;
235
236 if (ioctl(fd, cmd, &arg) == -1)
237 return PyErr_SetFromErrno(PyExc_IOError);
238 return PyInt_FromLong(arg);
239}
240
241
242/* _do_ioctl_1_internal() is a wrapper for ioctls that take no inputs
243 but return an output -- ie. we need to pass a pointer to a local C
244 variable so the driver can write its output there, but from Python
245 all we see is the return value. For example,
246 SOUND_MIXER_READ_DEVMASK returns a bitmask of available mixer
247 devices, but does not use the value of the parameter passed-in in any
248 way.
249*/
250static PyObject *
251_do_ioctl_1_internal(int fd, PyObject *args, char *fname, int cmd)
252{
253 char argfmt[32] = ":";
254 int arg = 0;
255
256 assert(strlen(fname) <= 30);
257 strcat(argfmt, fname);
258 if (!PyArg_ParseTuple(args, argfmt, &arg))
259 return NULL;
260
261 if (ioctl(fd, cmd, &arg) == -1)
262 return PyErr_SetFromErrno(PyExc_IOError);
263 return PyInt_FromLong(arg);
264}
265
266
267
268/* _do_ioctl_0() is a private helper for the no-argument ioctls:
269 SNDCTL_DSP_{SYNC,RESET,POST}. */
270static PyObject *
271_do_ioctl_0(int fd, PyObject *args, char *fname, int cmd)
272{
273 char argfmt[32] = ":";
274 int rv;
275
276 assert(strlen(fname) <= 30);
277 strcat(argfmt, fname);
278 if (!PyArg_ParseTuple(args, argfmt))
279 return NULL;
280
281 /* According to hannu@opensound.com, all three of the ioctls that
282 use this function can block, so release the GIL. This is
283 especially important for SYNC, which can block for several
284 seconds. */
285 Py_BEGIN_ALLOW_THREADS
286 rv = ioctl(fd, cmd, 0);
287 Py_END_ALLOW_THREADS
288
289 if (rv == -1)
290 return PyErr_SetFromErrno(PyExc_IOError);
291 Py_INCREF(Py_None);
292 return Py_None;
293}
294
295
296/* ----------------------------------------------------------------------
297 * Methods of DSP objects (OSSAudioType)
298 */
299
300static PyObject *
301oss_nonblock(oss_audio_t *self, PyObject *unused)
302{
303 /* Hmmm: it doesn't appear to be possible to return to blocking
304 mode once we're in non-blocking mode! */
305 if (ioctl(self->fd, SNDCTL_DSP_NONBLOCK, NULL) == -1)
306 return PyErr_SetFromErrno(PyExc_IOError);
307 Py_INCREF(Py_None);
308 return Py_None;
309}
310
311static PyObject *
312oss_setfmt(oss_audio_t *self, PyObject *args)
313{
314 return _do_ioctl_1(self->fd, args, "setfmt", SNDCTL_DSP_SETFMT);
315}
316
317static PyObject *
318oss_getfmts(oss_audio_t *self, PyObject *unused)
319{
320 int mask;
321 if (ioctl(self->fd, SNDCTL_DSP_GETFMTS, &mask) == -1)
322 return PyErr_SetFromErrno(PyExc_IOError);
323 return PyInt_FromLong(mask);
324}
325
326static PyObject *
327oss_channels(oss_audio_t *self, PyObject *args)
328{
329 return _do_ioctl_1(self->fd, args, "channels", SNDCTL_DSP_CHANNELS);
330}
331
332static PyObject *
333oss_speed(oss_audio_t *self, PyObject *args)
334{
335 return _do_ioctl_1(self->fd, args, "speed", SNDCTL_DSP_SPEED);
336}
337
338static PyObject *
339oss_sync(oss_audio_t *self, PyObject *args)
340{
341 return _do_ioctl_0(self->fd, args, "sync", SNDCTL_DSP_SYNC);
342}
343
344static PyObject *
345oss_reset(oss_audio_t *self, PyObject *args)
346{
347 return _do_ioctl_0(self->fd, args, "reset", SNDCTL_DSP_RESET);
348}
349
350static PyObject *
351oss_post(oss_audio_t *self, PyObject *args)
352{
353 return _do_ioctl_0(self->fd, args, "post", SNDCTL_DSP_POST);
354}
355
356
357/* Regular file methods: read(), write(), close(), etc. as well
358 as one convenience method, writeall(). */
359
360static PyObject *
361oss_read(oss_audio_t *self, PyObject *args)
362{
363 int size, count;
364 char *cp;
365 PyObject *rv;
366
367 if (!PyArg_ParseTuple(args, "i:read", &size))
368 return NULL;
369 rv = PyString_FromStringAndSize(NULL, size);
370 if (rv == NULL)
371 return NULL;
372 cp = PyString_AS_STRING(rv);
373
374 Py_BEGIN_ALLOW_THREADS
375 count = read(self->fd, cp, size);
376 Py_END_ALLOW_THREADS
377
378 if (count < 0) {
379 PyErr_SetFromErrno(PyExc_IOError);
380 Py_DECREF(rv);
381 return NULL;
382 }
383 self->icount += count;
384 _PyString_Resize(&rv, count);
385 return rv;
386}
387
388static PyObject *
389oss_write(oss_audio_t *self, PyObject *args)
390{
391 char *cp;
392 int rv, size;
393
394 if (!PyArg_ParseTuple(args, "s#:write", &cp, &size)) {
395 return NULL;
396 }
397
398 Py_BEGIN_ALLOW_THREADS
399 rv = write(self->fd, cp, size);
400 Py_END_ALLOW_THREADS
401
402 if (rv == -1) {
403 return PyErr_SetFromErrno(PyExc_IOError);
404 } else {
405 self->ocount += rv;
406 }
407 return PyInt_FromLong(rv);
408}
409
410static PyObject *
411oss_writeall(oss_audio_t *self, PyObject *args)
412{
413 char *cp;
414 int rv, size;
415 fd_set write_set_fds;
416 int select_rv;
417
418 /* NB. writeall() is only useful in non-blocking mode: according to
419 Guenter Geiger <geiger@xdv.org> on the linux-audio-dev list
420 (http://eca.cx/lad/2002/11/0380.html), OSS guarantees that
421 write() in blocking mode consumes the whole buffer. In blocking
422 mode, the behaviour of write() and writeall() from Python is
423 indistinguishable. */
424
425 if (!PyArg_ParseTuple(args, "s#:write", &cp, &size))
426 return NULL;
427
428 /* use select to wait for audio device to be available */
429 FD_ZERO(&write_set_fds);
430 FD_SET(self->fd, &write_set_fds);
431
432 while (size > 0) {
433 Py_BEGIN_ALLOW_THREADS
434 select_rv = select(self->fd+1, NULL, &write_set_fds, NULL, NULL);
435 Py_END_ALLOW_THREADS
436 assert(select_rv != 0); /* no timeout, can't expire */
437 if (select_rv == -1)
438 return PyErr_SetFromErrno(PyExc_IOError);
439
440 Py_BEGIN_ALLOW_THREADS
441 rv = write(self->fd, cp, size);
442 Py_END_ALLOW_THREADS
443 if (rv == -1) {
444 if (errno == EAGAIN) { /* buffer is full, try again */
445 errno = 0;
446 continue;
447 } else /* it's a real error */
448 return PyErr_SetFromErrno(PyExc_IOError);
449 } else { /* wrote rv bytes */
450 self->ocount += rv;
451 size -= rv;
452 cp += rv;
453 }
454 }
455 Py_INCREF(Py_None);
456 return Py_None;
457}
458
459static PyObject *
460oss_close(oss_audio_t *self, PyObject *unused)
461{
462 if (self->fd >= 0) {
463 Py_BEGIN_ALLOW_THREADS
464 close(self->fd);
465 Py_END_ALLOW_THREADS
466 self->fd = -1;
467 }
468 Py_INCREF(Py_None);
469 return Py_None;
470}
471
472static PyObject *
473oss_fileno(oss_audio_t *self, PyObject *unused)
474{
475 return PyInt_FromLong(self->fd);
476}
477
478
479/* Convenience methods: these generally wrap a couple of ioctls into one
480 common task. */
481
482static PyObject *
483oss_setparameters(oss_audio_t *self, PyObject *args)
484{
485 int wanted_fmt, wanted_channels, wanted_rate, strict=0;
486 int fmt, channels, rate;
487 PyObject * rv; /* return tuple (fmt, channels, rate) */
488
489 if (!PyArg_ParseTuple(args, "iii|i:setparameters",
490 &wanted_fmt, &wanted_channels, &wanted_rate,
491 &strict))
492 return NULL;
493
494 fmt = wanted_fmt;
495 if (ioctl(self->fd, SNDCTL_DSP_SETFMT, &fmt) == -1) {
496 return PyErr_SetFromErrno(PyExc_IOError);
497 }
498 if (strict && fmt != wanted_fmt) {
499 return PyErr_Format
500 (OSSAudioError,
501 "unable to set requested format (wanted %d, got %d)",
502 wanted_fmt, fmt);
503 }
504
505 channels = wanted_channels;
506 if (ioctl(self->fd, SNDCTL_DSP_CHANNELS, &channels) == -1) {
507 return PyErr_SetFromErrno(PyExc_IOError);
508 }
509 if (strict && channels != wanted_channels) {
510 return PyErr_Format
511 (OSSAudioError,
512 "unable to set requested channels (wanted %d, got %d)",
513 wanted_channels, channels);
514 }
515
516 rate = wanted_rate;
517 if (ioctl(self->fd, SNDCTL_DSP_SPEED, &rate) == -1) {
518 return PyErr_SetFromErrno(PyExc_IOError);
519 }
520 if (strict && rate != wanted_rate) {
521 return PyErr_Format
522 (OSSAudioError,
523 "unable to set requested rate (wanted %d, got %d)",
524 wanted_rate, rate);
525 }
526
527 /* Construct the return value: a (fmt, channels, rate) tuple that
528 tells what the audio hardware was actually set to. */
529 rv = PyTuple_New(3);
530 if (rv == NULL)
531 return NULL;
532 PyTuple_SET_ITEM(rv, 0, PyInt_FromLong(fmt));
533 PyTuple_SET_ITEM(rv, 1, PyInt_FromLong(channels));
534 PyTuple_SET_ITEM(rv, 2, PyInt_FromLong(rate));
535 return rv;
536}
537
538static int
539_ssize(oss_audio_t *self, int *nchannels, int *ssize)
540{
541 int fmt;
542
543 fmt = 0;
544 if (ioctl(self->fd, SNDCTL_DSP_SETFMT, &fmt) < 0)
545 return -errno;
546
547 switch (fmt) {
548 case AFMT_MU_LAW:
549 case AFMT_A_LAW:
550 case AFMT_U8:
551 case AFMT_S8:
552 *ssize = 1; /* 8 bit formats: 1 byte */
553 break;
554 case AFMT_S16_LE:
555 case AFMT_S16_BE:
556 case AFMT_U16_LE:
557 case AFMT_U16_BE:
558 *ssize = 2; /* 16 bit formats: 2 byte */
559 break;
560 case AFMT_MPEG:
561 case AFMT_IMA_ADPCM:
562 default:
563 return -EOPNOTSUPP;
564 }
565 if (ioctl(self->fd, SNDCTL_DSP_CHANNELS, nchannels) < 0)
566 return -errno;
567 return 0;
568}
569
570
571/* bufsize returns the size of the hardware audio buffer in number
572 of samples */
573static PyObject *
574oss_bufsize(oss_audio_t *self, PyObject *unused)
575{
576 audio_buf_info ai;
577 int nchannels=0, ssize=0;
578
579 if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) {
580 PyErr_SetFromErrno(PyExc_IOError);
581 return NULL;
582 }
583 if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {
584 PyErr_SetFromErrno(PyExc_IOError);
585 return NULL;
586 }
587 return PyInt_FromLong((ai.fragstotal * ai.fragsize) / (nchannels * ssize));
588}
589
590/* obufcount returns the number of samples that are available in the
591 hardware for playing */
592static PyObject *
593oss_obufcount(oss_audio_t *self, PyObject *unused)
594{
595 audio_buf_info ai;
596 int nchannels=0, ssize=0;
597
598 if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) {
599 PyErr_SetFromErrno(PyExc_IOError);
600 return NULL;
601 }
602 if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {
603 PyErr_SetFromErrno(PyExc_IOError);
604 return NULL;
605 }
606 return PyInt_FromLong((ai.fragstotal * ai.fragsize - ai.bytes) /
607 (ssize * nchannels));
608}
609
610/* obufcount returns the number of samples that can be played without
611 blocking */
612static PyObject *
613oss_obuffree(oss_audio_t *self, PyObject *unused)
614{
615 audio_buf_info ai;
616 int nchannels=0, ssize=0;
617
618 if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) {
619 PyErr_SetFromErrno(PyExc_IOError);
620 return NULL;
621 }
622 if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {
623 PyErr_SetFromErrno(PyExc_IOError);
624 return NULL;
625 }
626 return PyInt_FromLong(ai.bytes / (ssize * nchannels));
627}
628
629static PyObject *
630oss_getptr(oss_audio_t *self, PyObject *unused)
631{
632 count_info info;
633 int req;
634
635 if (self->mode == O_RDONLY)
636 req = SNDCTL_DSP_GETIPTR;
637 else
638 req = SNDCTL_DSP_GETOPTR;
639 if (ioctl(self->fd, req, &info) == -1) {
640 PyErr_SetFromErrno(PyExc_IOError);
641 return NULL;
642 }
643 return Py_BuildValue("iii", info.bytes, info.blocks, info.ptr);
644}
645
646
647/* ----------------------------------------------------------------------
648 * Methods of mixer objects (OSSMixerType)
649 */
650
651static PyObject *
652oss_mixer_close(oss_mixer_t *self, PyObject *unused)
653{
654 if (self->fd >= 0) {
655 close(self->fd);
656 self->fd = -1;
657 }
658 Py_INCREF(Py_None);
659 return Py_None;
660}
661
662static PyObject *
663oss_mixer_fileno(oss_mixer_t *self, PyObject *unused)
664{
665 return PyInt_FromLong(self->fd);
666}
667
668/* Simple mixer interface methods */
669
670static PyObject *
671oss_mixer_controls(oss_mixer_t *self, PyObject *args)
672{
673 return _do_ioctl_1_internal(self->fd, args, "controls",
674 SOUND_MIXER_READ_DEVMASK);
675}
676
677static PyObject *
678oss_mixer_stereocontrols(oss_mixer_t *self, PyObject *args)
679{
680 return _do_ioctl_1_internal(self->fd, args, "stereocontrols",
681 SOUND_MIXER_READ_STEREODEVS);
682}
683
684static PyObject *
685oss_mixer_reccontrols(oss_mixer_t *self, PyObject *args)
686{
687 return _do_ioctl_1_internal(self->fd, args, "reccontrols",
688 SOUND_MIXER_READ_RECMASK);
689}
690
691static PyObject *
692oss_mixer_get(oss_mixer_t *self, PyObject *args)
693{
694 int channel, volume;
695
696 /* Can't use _do_ioctl_1 because of encoded arg thingy. */
697 if (!PyArg_ParseTuple(args, "i:get", &channel))
698 return NULL;
699
700 if (channel < 0 || channel > SOUND_MIXER_NRDEVICES) {
701 PyErr_SetString(OSSAudioError, "Invalid mixer channel specified.");
702 return NULL;
703 }
704
705 if (ioctl(self->fd, MIXER_READ(channel), &volume) == -1)
706 return PyErr_SetFromErrno(PyExc_IOError);
707
708 return Py_BuildValue("(ii)", volume & 0xff, (volume & 0xff00) >> 8);
709}
710
711static PyObject *
712oss_mixer_set(oss_mixer_t *self, PyObject *args)
713{
714 int channel, volume, leftVol, rightVol;
715
716 /* Can't use _do_ioctl_1 because of encoded arg thingy. */
717 if (!PyArg_ParseTuple(args, "i(ii):set", &channel, &leftVol, &rightVol))
718 return NULL;
719
720 if (channel < 0 || channel > SOUND_MIXER_NRDEVICES) {
721 PyErr_SetString(OSSAudioError, "Invalid mixer channel specified.");
722 return NULL;
723 }
724
725 if (leftVol < 0 || rightVol < 0 || leftVol > 100 || rightVol > 100) {
726 PyErr_SetString(OSSAudioError, "Volumes must be between 0 and 100.");
727 return NULL;
728 }
729
730 volume = (rightVol << 8) | leftVol;
731
732 if (ioctl(self->fd, MIXER_WRITE(channel), &volume) == -1)
733 return PyErr_SetFromErrno(PyExc_IOError);
734
735 return Py_BuildValue("(ii)", volume & 0xff, (volume & 0xff00) >> 8);
736}
737
738static PyObject *
739oss_mixer_get_recsrc(oss_mixer_t *self, PyObject *args)
740{
741 return _do_ioctl_1_internal(self->fd, args, "get_recsrc",
742 SOUND_MIXER_READ_RECSRC);
743}
744
745static PyObject *
746oss_mixer_set_recsrc(oss_mixer_t *self, PyObject *args)
747{
748 return _do_ioctl_1(self->fd, args, "set_recsrc",
749 SOUND_MIXER_WRITE_RECSRC);
750}
751
752
753/* ----------------------------------------------------------------------
754 * Method tables and other bureaucracy
755 */
756
757static PyMethodDef oss_methods[] = {
758 /* Regular file methods */
759 { "read", (PyCFunction)oss_read, METH_VARARGS },
760 { "write", (PyCFunction)oss_write, METH_VARARGS },
761 { "writeall", (PyCFunction)oss_writeall, METH_VARARGS },
762 { "close", (PyCFunction)oss_close, METH_NOARGS },
763 { "fileno", (PyCFunction)oss_fileno, METH_NOARGS },
764
765 /* Simple ioctl wrappers */
766 { "nonblock", (PyCFunction)oss_nonblock, METH_NOARGS },
767 { "setfmt", (PyCFunction)oss_setfmt, METH_VARARGS },
768 { "getfmts", (PyCFunction)oss_getfmts, METH_NOARGS },
769 { "channels", (PyCFunction)oss_channels, METH_VARARGS },
770 { "speed", (PyCFunction)oss_speed, METH_VARARGS },
771 { "sync", (PyCFunction)oss_sync, METH_VARARGS },
772 { "reset", (PyCFunction)oss_reset, METH_VARARGS },
773 { "post", (PyCFunction)oss_post, METH_VARARGS },
774
775 /* Convenience methods -- wrap a couple of ioctls together */
776 { "setparameters", (PyCFunction)oss_setparameters, METH_VARARGS },
777 { "bufsize", (PyCFunction)oss_bufsize, METH_NOARGS },
778 { "obufcount", (PyCFunction)oss_obufcount, METH_NOARGS },
779 { "obuffree", (PyCFunction)oss_obuffree, METH_NOARGS },
780 { "getptr", (PyCFunction)oss_getptr, METH_NOARGS },
781
782 /* Aliases for backwards compatibility */
783 { "flush", (PyCFunction)oss_sync, METH_VARARGS },
784
785 { NULL, NULL} /* sentinel */
786};
787
788static PyMethodDef oss_mixer_methods[] = {
789 /* Regular file method - OSS mixers are ioctl-only interface */
790 { "close", (PyCFunction)oss_mixer_close, METH_NOARGS },
791 { "fileno", (PyCFunction)oss_mixer_fileno, METH_NOARGS },
792
793 /* Simple ioctl wrappers */
794 { "controls", (PyCFunction)oss_mixer_controls, METH_VARARGS },
795 { "stereocontrols", (PyCFunction)oss_mixer_stereocontrols, METH_VARARGS},
796 { "reccontrols", (PyCFunction)oss_mixer_reccontrols, METH_VARARGS},
797 { "get", (PyCFunction)oss_mixer_get, METH_VARARGS },
798 { "set", (PyCFunction)oss_mixer_set, METH_VARARGS },
799 { "get_recsrc", (PyCFunction)oss_mixer_get_recsrc, METH_VARARGS },
800 { "set_recsrc", (PyCFunction)oss_mixer_set_recsrc, METH_VARARGS },
801
802 { NULL, NULL}
803};
804
805static PyObject *
806oss_getattr(oss_audio_t *self, char *name)
807{
808 PyObject * rval = NULL;
809 if (strcmp(name, "closed") == 0) {
810 rval = (self->fd == -1) ? Py_True : Py_False;
811 Py_INCREF(rval);
812 }
813 else if (strcmp(name, "name") == 0) {
814 rval = PyString_FromString(self->devicename);
815 }
816 else if (strcmp(name, "mode") == 0) {
817 /* No need for a "default" in this switch: from newossobject(),
818 self->mode can only be one of these three values. */
819 switch(self->mode) {
820 case O_RDONLY:
821 rval = PyString_FromString("r");
822 break;
823 case O_RDWR:
824 rval = PyString_FromString("rw");
825 break;
826 case O_WRONLY:
827 rval = PyString_FromString("w");
828 break;
829 }
830 }
831 else {
832 rval = Py_FindMethod(oss_methods, (PyObject *)self, name);
833 }
834 return rval;
835}
836
837static PyObject *
838oss_mixer_getattr(oss_mixer_t *self, char *name)
839{
840 return Py_FindMethod(oss_mixer_methods, (PyObject *)self, name);
841}
842
843static PyTypeObject OSSAudioType = {
844 PyVarObject_HEAD_INIT(&PyType_Type, 0)
845 "ossaudiodev.oss_audio_device", /*tp_name*/
846 sizeof(oss_audio_t), /*tp_size*/
847 0, /*tp_itemsize*/
848 /* methods */
849 (destructor)oss_dealloc, /*tp_dealloc*/
850 0, /*tp_print*/
851 (getattrfunc)oss_getattr, /*tp_getattr*/
852 0, /*tp_setattr*/
853 0, /*tp_compare*/
854 0, /*tp_repr*/
855};
856
857static PyTypeObject OSSMixerType = {
858 PyVarObject_HEAD_INIT(&PyType_Type, 0)
859 "ossaudiodev.oss_mixer_device", /*tp_name*/
860 sizeof(oss_mixer_t), /*tp_size*/
861 0, /*tp_itemsize*/
862 /* methods */
863 (destructor)oss_mixer_dealloc, /*tp_dealloc*/
864 0, /*tp_print*/
865 (getattrfunc)oss_mixer_getattr, /*tp_getattr*/
866 0, /*tp_setattr*/
867 0, /*tp_compare*/
868 0, /*tp_repr*/
869};
870
871
872static PyObject *
873ossopen(PyObject *self, PyObject *args)
874{
875 return (PyObject *)newossobject(args);
876}
877
878static PyObject *
879ossopenmixer(PyObject *self, PyObject *args)
880{
881 return (PyObject *)newossmixerobject(args);
882}
883
884static PyMethodDef ossaudiodev_methods[] = {
885 { "open", ossopen, METH_VARARGS },
886 { "openmixer", ossopenmixer, METH_VARARGS },
887 { 0, 0 },
888};
889
890
891#define _EXPORT_INT(mod, name) \
892 if (PyModule_AddIntConstant(mod, #name, (long) (name)) == -1) return;
893
894
895static char *control_labels[] = SOUND_DEVICE_LABELS;
896static char *control_names[] = SOUND_DEVICE_NAMES;
897
898
899static int
900build_namelists (PyObject *module)
901{
902 PyObject *labels;
903 PyObject *names;
904 PyObject *s;
905 int num_controls;
906 int i;
907
908 num_controls = sizeof(control_labels) / sizeof(control_labels[0]);
909 assert(num_controls == sizeof(control_names) / sizeof(control_names[0]));
910
911 labels = PyList_New(num_controls);
912 names = PyList_New(num_controls);
913 if (labels == NULL || names == NULL)
914 goto error2;
915 for (i = 0; i < num_controls; i++) {
916 s = PyString_FromString(control_labels[i]);
917 if (s == NULL)
918 goto error2;
919 PyList_SET_ITEM(labels, i, s);
920
921 s = PyString_FromString(control_names[i]);
922 if (s == NULL)
923 goto error2;
924 PyList_SET_ITEM(names, i, s);
925 }
926
927 if (PyModule_AddObject(module, "control_labels", labels) == -1)
928 goto error2;
929 if (PyModule_AddObject(module, "control_names", names) == -1)
930 goto error1;
931
932 return 0;
933
934error2:
935 Py_XDECREF(labels);
936error1:
937 Py_XDECREF(names);
938 return -1;
939}
940
941
942void
943initossaudiodev(void)
944{
945 PyObject *m;
946
947 m = Py_InitModule("ossaudiodev", ossaudiodev_methods);
948 if (m == NULL)
949 return;
950
951 OSSAudioError = PyErr_NewException("ossaudiodev.OSSAudioError",
952 NULL, NULL);
953 if (OSSAudioError) {
954 /* Each call to PyModule_AddObject decrefs it; compensate: */
955 Py_INCREF(OSSAudioError);
956 Py_INCREF(OSSAudioError);
957 PyModule_AddObject(m, "error", OSSAudioError);
958 PyModule_AddObject(m, "OSSAudioError", OSSAudioError);
959 }
960
961 /* Build 'control_labels' and 'control_names' lists and add them
962 to the module. */
963 if (build_namelists(m) == -1) /* XXX what to do here? */
964 return;
965
966 /* Expose the audio format numbers -- essential! */
967 _EXPORT_INT(m, AFMT_QUERY);
968 _EXPORT_INT(m, AFMT_MU_LAW);
969 _EXPORT_INT(m, AFMT_A_LAW);
970 _EXPORT_INT(m, AFMT_IMA_ADPCM);
971 _EXPORT_INT(m, AFMT_U8);
972 _EXPORT_INT(m, AFMT_S16_LE);
973 _EXPORT_INT(m, AFMT_S16_BE);
974 _EXPORT_INT(m, AFMT_S8);
975 _EXPORT_INT(m, AFMT_U16_LE);
976 _EXPORT_INT(m, AFMT_U16_BE);
977 _EXPORT_INT(m, AFMT_MPEG);
978#ifdef AFMT_AC3
979 _EXPORT_INT(m, AFMT_AC3);
980#endif
981#ifdef AFMT_S16_NE
982 _EXPORT_INT(m, AFMT_S16_NE);
983#endif
984#ifdef AFMT_U16_NE
985 _EXPORT_INT(m, AFMT_U16_NE);
986#endif
987#ifdef AFMT_S32_LE
988 _EXPORT_INT(m, AFMT_S32_LE);
989#endif
990#ifdef AFMT_S32_BE
991 _EXPORT_INT(m, AFMT_S32_BE);
992#endif
993#ifdef AFMT_MPEG
994 _EXPORT_INT(m, AFMT_MPEG);
995#endif
996
997 /* Expose the sound mixer device numbers. */
998 _EXPORT_INT(m, SOUND_MIXER_NRDEVICES);
999 _EXPORT_INT(m, SOUND_MIXER_VOLUME);
1000 _EXPORT_INT(m, SOUND_MIXER_BASS);
1001 _EXPORT_INT(m, SOUND_MIXER_TREBLE);
1002 _EXPORT_INT(m, SOUND_MIXER_SYNTH);
1003 _EXPORT_INT(m, SOUND_MIXER_PCM);
1004 _EXPORT_INT(m, SOUND_MIXER_SPEAKER);
1005 _EXPORT_INT(m, SOUND_MIXER_LINE);
1006 _EXPORT_INT(m, SOUND_MIXER_MIC);
1007 _EXPORT_INT(m, SOUND_MIXER_CD);
1008 _EXPORT_INT(m, SOUND_MIXER_IMIX);
1009 _EXPORT_INT(m, SOUND_MIXER_ALTPCM);
1010 _EXPORT_INT(m, SOUND_MIXER_RECLEV);
1011 _EXPORT_INT(m, SOUND_MIXER_IGAIN);
1012 _EXPORT_INT(m, SOUND_MIXER_OGAIN);
1013 _EXPORT_INT(m, SOUND_MIXER_LINE1);
1014 _EXPORT_INT(m, SOUND_MIXER_LINE2);
1015 _EXPORT_INT(m, SOUND_MIXER_LINE3);
1016#ifdef SOUND_MIXER_DIGITAL1
1017 _EXPORT_INT(m, SOUND_MIXER_DIGITAL1);
1018#endif
1019#ifdef SOUND_MIXER_DIGITAL2
1020 _EXPORT_INT(m, SOUND_MIXER_DIGITAL2);
1021#endif
1022#ifdef SOUND_MIXER_DIGITAL3
1023 _EXPORT_INT(m, SOUND_MIXER_DIGITAL3);
1024#endif
1025#ifdef SOUND_MIXER_PHONEIN
1026 _EXPORT_INT(m, SOUND_MIXER_PHONEIN);
1027#endif
1028#ifdef SOUND_MIXER_PHONEOUT
1029 _EXPORT_INT(m, SOUND_MIXER_PHONEOUT);
1030#endif
1031#ifdef SOUND_MIXER_VIDEO
1032 _EXPORT_INT(m, SOUND_MIXER_VIDEO);
1033#endif
1034#ifdef SOUND_MIXER_RADIO
1035 _EXPORT_INT(m, SOUND_MIXER_RADIO);
1036#endif
1037#ifdef SOUND_MIXER_MONITOR
1038 _EXPORT_INT(m, SOUND_MIXER_MONITOR);
1039#endif
1040
1041 /* Expose all the ioctl numbers for masochists who like to do this
1042 stuff directly. */
1043 _EXPORT_INT(m, SNDCTL_COPR_HALT);
1044 _EXPORT_INT(m, SNDCTL_COPR_LOAD);
1045 _EXPORT_INT(m, SNDCTL_COPR_RCODE);
1046 _EXPORT_INT(m, SNDCTL_COPR_RCVMSG);
1047 _EXPORT_INT(m, SNDCTL_COPR_RDATA);
1048 _EXPORT_INT(m, SNDCTL_COPR_RESET);
1049 _EXPORT_INT(m, SNDCTL_COPR_RUN);
1050 _EXPORT_INT(m, SNDCTL_COPR_SENDMSG);
1051 _EXPORT_INT(m, SNDCTL_COPR_WCODE);
1052 _EXPORT_INT(m, SNDCTL_COPR_WDATA);
1053#ifdef SNDCTL_DSP_BIND_CHANNEL
1054 _EXPORT_INT(m, SNDCTL_DSP_BIND_CHANNEL);
1055#endif
1056 _EXPORT_INT(m, SNDCTL_DSP_CHANNELS);
1057 _EXPORT_INT(m, SNDCTL_DSP_GETBLKSIZE);
1058 _EXPORT_INT(m, SNDCTL_DSP_GETCAPS);
1059#ifdef SNDCTL_DSP_GETCHANNELMASK
1060 _EXPORT_INT(m, SNDCTL_DSP_GETCHANNELMASK);
1061#endif
1062 _EXPORT_INT(m, SNDCTL_DSP_GETFMTS);
1063 _EXPORT_INT(m, SNDCTL_DSP_GETIPTR);
1064 _EXPORT_INT(m, SNDCTL_DSP_GETISPACE);
1065#ifdef SNDCTL_DSP_GETODELAY
1066 _EXPORT_INT(m, SNDCTL_DSP_GETODELAY);
1067#endif
1068 _EXPORT_INT(m, SNDCTL_DSP_GETOPTR);
1069 _EXPORT_INT(m, SNDCTL_DSP_GETOSPACE);
1070#ifdef SNDCTL_DSP_GETSPDIF
1071 _EXPORT_INT(m, SNDCTL_DSP_GETSPDIF);
1072#endif
1073 _EXPORT_INT(m, SNDCTL_DSP_GETTRIGGER);
1074 _EXPORT_INT(m, SNDCTL_DSP_MAPINBUF);
1075 _EXPORT_INT(m, SNDCTL_DSP_MAPOUTBUF);
1076 _EXPORT_INT(m, SNDCTL_DSP_NONBLOCK);
1077 _EXPORT_INT(m, SNDCTL_DSP_POST);
1078#ifdef SNDCTL_DSP_PROFILE
1079 _EXPORT_INT(m, SNDCTL_DSP_PROFILE);
1080#endif
1081 _EXPORT_INT(m, SNDCTL_DSP_RESET);
1082 _EXPORT_INT(m, SNDCTL_DSP_SAMPLESIZE);
1083 _EXPORT_INT(m, SNDCTL_DSP_SETDUPLEX);
1084 _EXPORT_INT(m, SNDCTL_DSP_SETFMT);
1085 _EXPORT_INT(m, SNDCTL_DSP_SETFRAGMENT);
1086#ifdef SNDCTL_DSP_SETSPDIF
1087 _EXPORT_INT(m, SNDCTL_DSP_SETSPDIF);
1088#endif
1089 _EXPORT_INT(m, SNDCTL_DSP_SETSYNCRO);
1090 _EXPORT_INT(m, SNDCTL_DSP_SETTRIGGER);
1091 _EXPORT_INT(m, SNDCTL_DSP_SPEED);
1092 _EXPORT_INT(m, SNDCTL_DSP_STEREO);
1093 _EXPORT_INT(m, SNDCTL_DSP_SUBDIVIDE);
1094 _EXPORT_INT(m, SNDCTL_DSP_SYNC);
1095 _EXPORT_INT(m, SNDCTL_FM_4OP_ENABLE);
1096 _EXPORT_INT(m, SNDCTL_FM_LOAD_INSTR);
1097 _EXPORT_INT(m, SNDCTL_MIDI_INFO);
1098 _EXPORT_INT(m, SNDCTL_MIDI_MPUCMD);
1099 _EXPORT_INT(m, SNDCTL_MIDI_MPUMODE);
1100 _EXPORT_INT(m, SNDCTL_MIDI_PRETIME);
1101 _EXPORT_INT(m, SNDCTL_SEQ_CTRLRATE);
1102 _EXPORT_INT(m, SNDCTL_SEQ_GETINCOUNT);
1103 _EXPORT_INT(m, SNDCTL_SEQ_GETOUTCOUNT);
1104#ifdef SNDCTL_SEQ_GETTIME
1105 _EXPORT_INT(m, SNDCTL_SEQ_GETTIME);
1106#endif
1107 _EXPORT_INT(m, SNDCTL_SEQ_NRMIDIS);
1108 _EXPORT_INT(m, SNDCTL_SEQ_NRSYNTHS);
1109 _EXPORT_INT(m, SNDCTL_SEQ_OUTOFBAND);
1110 _EXPORT_INT(m, SNDCTL_SEQ_PANIC);
1111 _EXPORT_INT(m, SNDCTL_SEQ_PERCMODE);
1112 _EXPORT_INT(m, SNDCTL_SEQ_RESET);
1113 _EXPORT_INT(m, SNDCTL_SEQ_RESETSAMPLES);
1114 _EXPORT_INT(m, SNDCTL_SEQ_SYNC);
1115 _EXPORT_INT(m, SNDCTL_SEQ_TESTMIDI);
1116 _EXPORT_INT(m, SNDCTL_SEQ_THRESHOLD);
1117#ifdef SNDCTL_SYNTH_CONTROL
1118 _EXPORT_INT(m, SNDCTL_SYNTH_CONTROL);
1119#endif
1120#ifdef SNDCTL_SYNTH_ID
1121 _EXPORT_INT(m, SNDCTL_SYNTH_ID);
1122#endif
1123 _EXPORT_INT(m, SNDCTL_SYNTH_INFO);
1124 _EXPORT_INT(m, SNDCTL_SYNTH_MEMAVL);
1125#ifdef SNDCTL_SYNTH_REMOVESAMPLE
1126 _EXPORT_INT(m, SNDCTL_SYNTH_REMOVESAMPLE);
1127#endif
1128 _EXPORT_INT(m, SNDCTL_TMR_CONTINUE);
1129 _EXPORT_INT(m, SNDCTL_TMR_METRONOME);
1130 _EXPORT_INT(m, SNDCTL_TMR_SELECT);
1131 _EXPORT_INT(m, SNDCTL_TMR_SOURCE);
1132 _EXPORT_INT(m, SNDCTL_TMR_START);
1133 _EXPORT_INT(m, SNDCTL_TMR_STOP);
1134 _EXPORT_INT(m, SNDCTL_TMR_TEMPO);
1135 _EXPORT_INT(m, SNDCTL_TMR_TIMEBASE);
1136}
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