source: python/trunk/Modules/ossaudiodev.c

Last change on this file was 391, checked in by dmik, 11 years ago

python: Merge vendor 2.7.6 to trunk.
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[2]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 *
[391]19 * $Id$
[2]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) {
[391]132 close(fd);
[2]133 PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename);
134 return NULL;
135 }
136 /* Create and initialize the object */
137 if ((self = PyObject_New(oss_audio_t, &OSSAudioType)) == NULL) {
138 close(fd);
139 return NULL;
140 }
141 self->devicename = devicename;
142 self->fd = fd;
143 self->mode = imode;
144 self->icount = self->ocount = 0;
145 self->afmts = afmts;
146 return self;
147}
148
149static void
150oss_dealloc(oss_audio_t *self)
151{
152 /* if already closed, don't reclose it */
153 if (self->fd != -1)
154 close(self->fd);
155 PyObject_Del(self);
156}
157
158
159/* ----------------------------------------------------------------------
160 * Mixer object initialization/deallocation
161 */
162
163static oss_mixer_t *
164newossmixerobject(PyObject *arg)
165{
166 char *devicename = NULL;
167 int fd;
168 oss_mixer_t *self;
169
170 if (!PyArg_ParseTuple(arg, "|s", &devicename)) {
171 return NULL;
172 }
173
174 if (devicename == NULL) {
175 devicename = getenv("MIXERDEV");
176 if (devicename == NULL) /* MIXERDEV not set */
177 devicename = "/dev/mixer";
178 }
179
180 if ((fd = open(devicename, O_RDWR)) == -1) {
181 PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename);
182 return NULL;
183 }
184
185 if ((self = PyObject_New(oss_mixer_t, &OSSMixerType)) == NULL) {
186 close(fd);
187 return NULL;
188 }
189
190 self->fd = fd;
191
192 return self;
193}
194
195static void
196oss_mixer_dealloc(oss_mixer_t *self)
197{
198 /* if already closed, don't reclose it */
199 if (self->fd != -1)
200 close(self->fd);
201 PyObject_Del(self);
202}
203
204
205/* Methods to wrap the OSS ioctls. The calling convention is pretty
206 simple:
207 nonblock() -> ioctl(fd, SNDCTL_DSP_NONBLOCK)
208 fmt = setfmt(fmt) -> ioctl(fd, SNDCTL_DSP_SETFMT, &fmt)
209 etc.
210*/
211
212
213/* ----------------------------------------------------------------------
214 * Helper functions
215 */
216
217/* _do_ioctl_1() is a private helper function used for the OSS ioctls --
[391]218 SNDCTL_DSP_{SETFMT,CHANNELS,SPEED} -- that are called from C
[2]219 like this:
220 ioctl(fd, SNDCTL_DSP_cmd, &arg)
221
222 where arg is the value to set, and on return the driver sets arg to
223 the value that was actually set. Mapping this to Python is obvious:
224 arg = dsp.xxx(arg)
225*/
226static PyObject *
227_do_ioctl_1(int fd, PyObject *args, char *fname, int cmd)
228{
229 char argfmt[33] = "i:";
230 int arg;
231
232 assert(strlen(fname) <= 30);
233 strcat(argfmt, fname);
234 if (!PyArg_ParseTuple(args, argfmt, &arg))
235 return NULL;
236
237 if (ioctl(fd, cmd, &arg) == -1)
238 return PyErr_SetFromErrno(PyExc_IOError);
239 return PyInt_FromLong(arg);
240}
241
242
243/* _do_ioctl_1_internal() is a wrapper for ioctls that take no inputs
244 but return an output -- ie. we need to pass a pointer to a local C
245 variable so the driver can write its output there, but from Python
246 all we see is the return value. For example,
247 SOUND_MIXER_READ_DEVMASK returns a bitmask of available mixer
248 devices, but does not use the value of the parameter passed-in in any
249 way.
250*/
251static PyObject *
252_do_ioctl_1_internal(int fd, PyObject *args, char *fname, int cmd)
253{
254 char argfmt[32] = ":";
255 int arg = 0;
256
257 assert(strlen(fname) <= 30);
258 strcat(argfmt, fname);
259 if (!PyArg_ParseTuple(args, argfmt, &arg))
260 return NULL;
261
262 if (ioctl(fd, cmd, &arg) == -1)
263 return PyErr_SetFromErrno(PyExc_IOError);
264 return PyInt_FromLong(arg);
265}
266
267
268
269/* _do_ioctl_0() is a private helper for the no-argument ioctls:
270 SNDCTL_DSP_{SYNC,RESET,POST}. */
271static PyObject *
272_do_ioctl_0(int fd, PyObject *args, char *fname, int cmd)
273{
274 char argfmt[32] = ":";
275 int rv;
276
277 assert(strlen(fname) <= 30);
278 strcat(argfmt, fname);
279 if (!PyArg_ParseTuple(args, argfmt))
280 return NULL;
281
282 /* According to hannu@opensound.com, all three of the ioctls that
283 use this function can block, so release the GIL. This is
284 especially important for SYNC, which can block for several
285 seconds. */
286 Py_BEGIN_ALLOW_THREADS
287 rv = ioctl(fd, cmd, 0);
288 Py_END_ALLOW_THREADS
289
290 if (rv == -1)
291 return PyErr_SetFromErrno(PyExc_IOError);
292 Py_INCREF(Py_None);
293 return Py_None;
294}
295
296
297/* ----------------------------------------------------------------------
298 * Methods of DSP objects (OSSAudioType)
299 */
300
301static PyObject *
302oss_nonblock(oss_audio_t *self, PyObject *unused)
303{
304 /* Hmmm: it doesn't appear to be possible to return to blocking
305 mode once we're in non-blocking mode! */
306 if (ioctl(self->fd, SNDCTL_DSP_NONBLOCK, NULL) == -1)
307 return PyErr_SetFromErrno(PyExc_IOError);
308 Py_INCREF(Py_None);
309 return Py_None;
310}
311
312static PyObject *
313oss_setfmt(oss_audio_t *self, PyObject *args)
314{
315 return _do_ioctl_1(self->fd, args, "setfmt", SNDCTL_DSP_SETFMT);
316}
317
318static PyObject *
319oss_getfmts(oss_audio_t *self, PyObject *unused)
320{
321 int mask;
322 if (ioctl(self->fd, SNDCTL_DSP_GETFMTS, &mask) == -1)
323 return PyErr_SetFromErrno(PyExc_IOError);
324 return PyInt_FromLong(mask);
325}
326
327static PyObject *
328oss_channels(oss_audio_t *self, PyObject *args)
329{
330 return _do_ioctl_1(self->fd, args, "channels", SNDCTL_DSP_CHANNELS);
331}
332
333static PyObject *
334oss_speed(oss_audio_t *self, PyObject *args)
335{
336 return _do_ioctl_1(self->fd, args, "speed", SNDCTL_DSP_SPEED);
337}
338
339static PyObject *
340oss_sync(oss_audio_t *self, PyObject *args)
341{
342 return _do_ioctl_0(self->fd, args, "sync", SNDCTL_DSP_SYNC);
343}
344
345static PyObject *
346oss_reset(oss_audio_t *self, PyObject *args)
347{
348 return _do_ioctl_0(self->fd, args, "reset", SNDCTL_DSP_RESET);
349}
350
351static PyObject *
352oss_post(oss_audio_t *self, PyObject *args)
353{
354 return _do_ioctl_0(self->fd, args, "post", SNDCTL_DSP_POST);
355}
356
357
358/* Regular file methods: read(), write(), close(), etc. as well
359 as one convenience method, writeall(). */
360
361static PyObject *
362oss_read(oss_audio_t *self, PyObject *args)
363{
364 int size, count;
365 char *cp;
366 PyObject *rv;
367
368 if (!PyArg_ParseTuple(args, "i:read", &size))
369 return NULL;
370 rv = PyString_FromStringAndSize(NULL, size);
371 if (rv == NULL)
372 return NULL;
373 cp = PyString_AS_STRING(rv);
374
375 Py_BEGIN_ALLOW_THREADS
376 count = read(self->fd, cp, size);
377 Py_END_ALLOW_THREADS
378
379 if (count < 0) {
380 PyErr_SetFromErrno(PyExc_IOError);
381 Py_DECREF(rv);
382 return NULL;
383 }
384 self->icount += count;
385 _PyString_Resize(&rv, count);
386 return rv;
387}
388
389static PyObject *
390oss_write(oss_audio_t *self, PyObject *args)
391{
392 char *cp;
393 int rv, size;
394
395 if (!PyArg_ParseTuple(args, "s#:write", &cp, &size)) {
396 return NULL;
397 }
398
399 Py_BEGIN_ALLOW_THREADS
400 rv = write(self->fd, cp, size);
401 Py_END_ALLOW_THREADS
402
403 if (rv == -1) {
404 return PyErr_SetFromErrno(PyExc_IOError);
405 } else {
406 self->ocount += rv;
407 }
408 return PyInt_FromLong(rv);
409}
410
411static PyObject *
412oss_writeall(oss_audio_t *self, PyObject *args)
413{
414 char *cp;
415 int rv, size;
416 fd_set write_set_fds;
417 int select_rv;
418
419 /* NB. writeall() is only useful in non-blocking mode: according to
420 Guenter Geiger <geiger@xdv.org> on the linux-audio-dev list
421 (http://eca.cx/lad/2002/11/0380.html), OSS guarantees that
422 write() in blocking mode consumes the whole buffer. In blocking
423 mode, the behaviour of write() and writeall() from Python is
424 indistinguishable. */
425
426 if (!PyArg_ParseTuple(args, "s#:write", &cp, &size))
427 return NULL;
428
[391]429 if (!_PyIsSelectable_fd(self->fd)) {
430 PyErr_SetString(PyExc_ValueError,
431 "file descriptor out of range for select");
432 return NULL;
433 }
[2]434 /* use select to wait for audio device to be available */
435 FD_ZERO(&write_set_fds);
436 FD_SET(self->fd, &write_set_fds);
437
438 while (size > 0) {
439 Py_BEGIN_ALLOW_THREADS
440 select_rv = select(self->fd+1, NULL, &write_set_fds, NULL, NULL);
441 Py_END_ALLOW_THREADS
442 assert(select_rv != 0); /* no timeout, can't expire */
443 if (select_rv == -1)
444 return PyErr_SetFromErrno(PyExc_IOError);
445
446 Py_BEGIN_ALLOW_THREADS
447 rv = write(self->fd, cp, size);
448 Py_END_ALLOW_THREADS
449 if (rv == -1) {
450 if (errno == EAGAIN) { /* buffer is full, try again */
451 errno = 0;
452 continue;
453 } else /* it's a real error */
454 return PyErr_SetFromErrno(PyExc_IOError);
455 } else { /* wrote rv bytes */
456 self->ocount += rv;
457 size -= rv;
458 cp += rv;
459 }
460 }
461 Py_INCREF(Py_None);
462 return Py_None;
463}
464
465static PyObject *
466oss_close(oss_audio_t *self, PyObject *unused)
467{
468 if (self->fd >= 0) {
469 Py_BEGIN_ALLOW_THREADS
470 close(self->fd);
471 Py_END_ALLOW_THREADS
472 self->fd = -1;
473 }
474 Py_INCREF(Py_None);
475 return Py_None;
476}
477
478static PyObject *
479oss_fileno(oss_audio_t *self, PyObject *unused)
480{
481 return PyInt_FromLong(self->fd);
482}
483
484
485/* Convenience methods: these generally wrap a couple of ioctls into one
486 common task. */
487
488static PyObject *
489oss_setparameters(oss_audio_t *self, PyObject *args)
490{
491 int wanted_fmt, wanted_channels, wanted_rate, strict=0;
492 int fmt, channels, rate;
493 PyObject * rv; /* return tuple (fmt, channels, rate) */
494
495 if (!PyArg_ParseTuple(args, "iii|i:setparameters",
496 &wanted_fmt, &wanted_channels, &wanted_rate,
497 &strict))
498 return NULL;
499
500 fmt = wanted_fmt;
501 if (ioctl(self->fd, SNDCTL_DSP_SETFMT, &fmt) == -1) {
502 return PyErr_SetFromErrno(PyExc_IOError);
503 }
504 if (strict && fmt != wanted_fmt) {
505 return PyErr_Format
506 (OSSAudioError,
507 "unable to set requested format (wanted %d, got %d)",
508 wanted_fmt, fmt);
509 }
510
511 channels = wanted_channels;
512 if (ioctl(self->fd, SNDCTL_DSP_CHANNELS, &channels) == -1) {
513 return PyErr_SetFromErrno(PyExc_IOError);
514 }
515 if (strict && channels != wanted_channels) {
516 return PyErr_Format
517 (OSSAudioError,
518 "unable to set requested channels (wanted %d, got %d)",
519 wanted_channels, channels);
520 }
521
522 rate = wanted_rate;
523 if (ioctl(self->fd, SNDCTL_DSP_SPEED, &rate) == -1) {
524 return PyErr_SetFromErrno(PyExc_IOError);
525 }
526 if (strict && rate != wanted_rate) {
527 return PyErr_Format
528 (OSSAudioError,
529 "unable to set requested rate (wanted %d, got %d)",
530 wanted_rate, rate);
531 }
532
533 /* Construct the return value: a (fmt, channels, rate) tuple that
534 tells what the audio hardware was actually set to. */
535 rv = PyTuple_New(3);
536 if (rv == NULL)
537 return NULL;
538 PyTuple_SET_ITEM(rv, 0, PyInt_FromLong(fmt));
539 PyTuple_SET_ITEM(rv, 1, PyInt_FromLong(channels));
540 PyTuple_SET_ITEM(rv, 2, PyInt_FromLong(rate));
541 return rv;
542}
543
544static int
545_ssize(oss_audio_t *self, int *nchannels, int *ssize)
546{
547 int fmt;
548
549 fmt = 0;
550 if (ioctl(self->fd, SNDCTL_DSP_SETFMT, &fmt) < 0)
551 return -errno;
552
553 switch (fmt) {
554 case AFMT_MU_LAW:
555 case AFMT_A_LAW:
556 case AFMT_U8:
557 case AFMT_S8:
558 *ssize = 1; /* 8 bit formats: 1 byte */
559 break;
560 case AFMT_S16_LE:
561 case AFMT_S16_BE:
562 case AFMT_U16_LE:
563 case AFMT_U16_BE:
564 *ssize = 2; /* 16 bit formats: 2 byte */
565 break;
566 case AFMT_MPEG:
567 case AFMT_IMA_ADPCM:
568 default:
569 return -EOPNOTSUPP;
570 }
571 if (ioctl(self->fd, SNDCTL_DSP_CHANNELS, nchannels) < 0)
572 return -errno;
573 return 0;
574}
575
576
577/* bufsize returns the size of the hardware audio buffer in number
578 of samples */
579static PyObject *
580oss_bufsize(oss_audio_t *self, PyObject *unused)
581{
582 audio_buf_info ai;
583 int nchannels=0, ssize=0;
584
585 if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) {
586 PyErr_SetFromErrno(PyExc_IOError);
587 return NULL;
588 }
589 if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {
590 PyErr_SetFromErrno(PyExc_IOError);
591 return NULL;
592 }
593 return PyInt_FromLong((ai.fragstotal * ai.fragsize) / (nchannels * ssize));
594}
595
596/* obufcount returns the number of samples that are available in the
597 hardware for playing */
598static PyObject *
599oss_obufcount(oss_audio_t *self, PyObject *unused)
600{
601 audio_buf_info ai;
602 int nchannels=0, ssize=0;
603
604 if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) {
605 PyErr_SetFromErrno(PyExc_IOError);
606 return NULL;
607 }
608 if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {
609 PyErr_SetFromErrno(PyExc_IOError);
610 return NULL;
611 }
612 return PyInt_FromLong((ai.fragstotal * ai.fragsize - ai.bytes) /
613 (ssize * nchannels));
614}
615
616/* obufcount returns the number of samples that can be played without
617 blocking */
618static PyObject *
619oss_obuffree(oss_audio_t *self, PyObject *unused)
620{
621 audio_buf_info ai;
622 int nchannels=0, ssize=0;
623
624 if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) {
625 PyErr_SetFromErrno(PyExc_IOError);
626 return NULL;
627 }
628 if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {
629 PyErr_SetFromErrno(PyExc_IOError);
630 return NULL;
631 }
632 return PyInt_FromLong(ai.bytes / (ssize * nchannels));
633}
634
635static PyObject *
636oss_getptr(oss_audio_t *self, PyObject *unused)
637{
638 count_info info;
639 int req;
640
641 if (self->mode == O_RDONLY)
642 req = SNDCTL_DSP_GETIPTR;
643 else
644 req = SNDCTL_DSP_GETOPTR;
645 if (ioctl(self->fd, req, &info) == -1) {
646 PyErr_SetFromErrno(PyExc_IOError);
647 return NULL;
648 }
649 return Py_BuildValue("iii", info.bytes, info.blocks, info.ptr);
650}
651
652
653/* ----------------------------------------------------------------------
654 * Methods of mixer objects (OSSMixerType)
655 */
656
657static PyObject *
658oss_mixer_close(oss_mixer_t *self, PyObject *unused)
659{
660 if (self->fd >= 0) {
661 close(self->fd);
662 self->fd = -1;
663 }
664 Py_INCREF(Py_None);
665 return Py_None;
666}
667
668static PyObject *
669oss_mixer_fileno(oss_mixer_t *self, PyObject *unused)
670{
671 return PyInt_FromLong(self->fd);
672}
673
674/* Simple mixer interface methods */
675
676static PyObject *
677oss_mixer_controls(oss_mixer_t *self, PyObject *args)
678{
679 return _do_ioctl_1_internal(self->fd, args, "controls",
680 SOUND_MIXER_READ_DEVMASK);
681}
682
683static PyObject *
684oss_mixer_stereocontrols(oss_mixer_t *self, PyObject *args)
685{
686 return _do_ioctl_1_internal(self->fd, args, "stereocontrols",
687 SOUND_MIXER_READ_STEREODEVS);
688}
689
690static PyObject *
691oss_mixer_reccontrols(oss_mixer_t *self, PyObject *args)
692{
693 return _do_ioctl_1_internal(self->fd, args, "reccontrols",
694 SOUND_MIXER_READ_RECMASK);
695}
696
697static PyObject *
698oss_mixer_get(oss_mixer_t *self, PyObject *args)
699{
700 int channel, volume;
701
702 /* Can't use _do_ioctl_1 because of encoded arg thingy. */
703 if (!PyArg_ParseTuple(args, "i:get", &channel))
704 return NULL;
705
706 if (channel < 0 || channel > SOUND_MIXER_NRDEVICES) {
707 PyErr_SetString(OSSAudioError, "Invalid mixer channel specified.");
708 return NULL;
709 }
710
711 if (ioctl(self->fd, MIXER_READ(channel), &volume) == -1)
712 return PyErr_SetFromErrno(PyExc_IOError);
713
714 return Py_BuildValue("(ii)", volume & 0xff, (volume & 0xff00) >> 8);
715}
716
717static PyObject *
718oss_mixer_set(oss_mixer_t *self, PyObject *args)
719{
720 int channel, volume, leftVol, rightVol;
721
722 /* Can't use _do_ioctl_1 because of encoded arg thingy. */
723 if (!PyArg_ParseTuple(args, "i(ii):set", &channel, &leftVol, &rightVol))
724 return NULL;
725
726 if (channel < 0 || channel > SOUND_MIXER_NRDEVICES) {
727 PyErr_SetString(OSSAudioError, "Invalid mixer channel specified.");
728 return NULL;
729 }
730
731 if (leftVol < 0 || rightVol < 0 || leftVol > 100 || rightVol > 100) {
732 PyErr_SetString(OSSAudioError, "Volumes must be between 0 and 100.");
733 return NULL;
734 }
735
736 volume = (rightVol << 8) | leftVol;
737
738 if (ioctl(self->fd, MIXER_WRITE(channel), &volume) == -1)
739 return PyErr_SetFromErrno(PyExc_IOError);
740
741 return Py_BuildValue("(ii)", volume & 0xff, (volume & 0xff00) >> 8);
742}
743
744static PyObject *
745oss_mixer_get_recsrc(oss_mixer_t *self, PyObject *args)
746{
747 return _do_ioctl_1_internal(self->fd, args, "get_recsrc",
748 SOUND_MIXER_READ_RECSRC);
749}
750
751static PyObject *
752oss_mixer_set_recsrc(oss_mixer_t *self, PyObject *args)
753{
754 return _do_ioctl_1(self->fd, args, "set_recsrc",
755 SOUND_MIXER_WRITE_RECSRC);
756}
757
758
759/* ----------------------------------------------------------------------
760 * Method tables and other bureaucracy
761 */
762
763static PyMethodDef oss_methods[] = {
764 /* Regular file methods */
765 { "read", (PyCFunction)oss_read, METH_VARARGS },
766 { "write", (PyCFunction)oss_write, METH_VARARGS },
767 { "writeall", (PyCFunction)oss_writeall, METH_VARARGS },
768 { "close", (PyCFunction)oss_close, METH_NOARGS },
769 { "fileno", (PyCFunction)oss_fileno, METH_NOARGS },
770
771 /* Simple ioctl wrappers */
772 { "nonblock", (PyCFunction)oss_nonblock, METH_NOARGS },
773 { "setfmt", (PyCFunction)oss_setfmt, METH_VARARGS },
774 { "getfmts", (PyCFunction)oss_getfmts, METH_NOARGS },
775 { "channels", (PyCFunction)oss_channels, METH_VARARGS },
776 { "speed", (PyCFunction)oss_speed, METH_VARARGS },
777 { "sync", (PyCFunction)oss_sync, METH_VARARGS },
778 { "reset", (PyCFunction)oss_reset, METH_VARARGS },
779 { "post", (PyCFunction)oss_post, METH_VARARGS },
780
781 /* Convenience methods -- wrap a couple of ioctls together */
782 { "setparameters", (PyCFunction)oss_setparameters, METH_VARARGS },
783 { "bufsize", (PyCFunction)oss_bufsize, METH_NOARGS },
784 { "obufcount", (PyCFunction)oss_obufcount, METH_NOARGS },
785 { "obuffree", (PyCFunction)oss_obuffree, METH_NOARGS },
786 { "getptr", (PyCFunction)oss_getptr, METH_NOARGS },
787
788 /* Aliases for backwards compatibility */
789 { "flush", (PyCFunction)oss_sync, METH_VARARGS },
790
791 { NULL, NULL} /* sentinel */
792};
793
794static PyMethodDef oss_mixer_methods[] = {
795 /* Regular file method - OSS mixers are ioctl-only interface */
796 { "close", (PyCFunction)oss_mixer_close, METH_NOARGS },
797 { "fileno", (PyCFunction)oss_mixer_fileno, METH_NOARGS },
798
799 /* Simple ioctl wrappers */
800 { "controls", (PyCFunction)oss_mixer_controls, METH_VARARGS },
801 { "stereocontrols", (PyCFunction)oss_mixer_stereocontrols, METH_VARARGS},
802 { "reccontrols", (PyCFunction)oss_mixer_reccontrols, METH_VARARGS},
803 { "get", (PyCFunction)oss_mixer_get, METH_VARARGS },
804 { "set", (PyCFunction)oss_mixer_set, METH_VARARGS },
805 { "get_recsrc", (PyCFunction)oss_mixer_get_recsrc, METH_VARARGS },
806 { "set_recsrc", (PyCFunction)oss_mixer_set_recsrc, METH_VARARGS },
807
808 { NULL, NULL}
809};
810
811static PyObject *
812oss_getattr(oss_audio_t *self, char *name)
813{
814 PyObject * rval = NULL;
815 if (strcmp(name, "closed") == 0) {
816 rval = (self->fd == -1) ? Py_True : Py_False;
817 Py_INCREF(rval);
818 }
819 else if (strcmp(name, "name") == 0) {
820 rval = PyString_FromString(self->devicename);
821 }
822 else if (strcmp(name, "mode") == 0) {
823 /* No need for a "default" in this switch: from newossobject(),
824 self->mode can only be one of these three values. */
825 switch(self->mode) {
826 case O_RDONLY:
827 rval = PyString_FromString("r");
828 break;
829 case O_RDWR:
830 rval = PyString_FromString("rw");
831 break;
832 case O_WRONLY:
833 rval = PyString_FromString("w");
834 break;
835 }
836 }
837 else {
838 rval = Py_FindMethod(oss_methods, (PyObject *)self, name);
839 }
840 return rval;
841}
842
843static PyObject *
844oss_mixer_getattr(oss_mixer_t *self, char *name)
845{
846 return Py_FindMethod(oss_mixer_methods, (PyObject *)self, name);
847}
848
849static PyTypeObject OSSAudioType = {
850 PyVarObject_HEAD_INIT(&PyType_Type, 0)
851 "ossaudiodev.oss_audio_device", /*tp_name*/
852 sizeof(oss_audio_t), /*tp_size*/
853 0, /*tp_itemsize*/
854 /* methods */
855 (destructor)oss_dealloc, /*tp_dealloc*/
856 0, /*tp_print*/
857 (getattrfunc)oss_getattr, /*tp_getattr*/
858 0, /*tp_setattr*/
859 0, /*tp_compare*/
860 0, /*tp_repr*/
861};
862
863static PyTypeObject OSSMixerType = {
864 PyVarObject_HEAD_INIT(&PyType_Type, 0)
865 "ossaudiodev.oss_mixer_device", /*tp_name*/
866 sizeof(oss_mixer_t), /*tp_size*/
867 0, /*tp_itemsize*/
868 /* methods */
869 (destructor)oss_mixer_dealloc, /*tp_dealloc*/
870 0, /*tp_print*/
871 (getattrfunc)oss_mixer_getattr, /*tp_getattr*/
872 0, /*tp_setattr*/
873 0, /*tp_compare*/
874 0, /*tp_repr*/
875};
876
877
878static PyObject *
879ossopen(PyObject *self, PyObject *args)
880{
881 return (PyObject *)newossobject(args);
882}
883
884static PyObject *
885ossopenmixer(PyObject *self, PyObject *args)
886{
887 return (PyObject *)newossmixerobject(args);
888}
889
890static PyMethodDef ossaudiodev_methods[] = {
891 { "open", ossopen, METH_VARARGS },
892 { "openmixer", ossopenmixer, METH_VARARGS },
893 { 0, 0 },
894};
895
896
897#define _EXPORT_INT(mod, name) \
898 if (PyModule_AddIntConstant(mod, #name, (long) (name)) == -1) return;
899
900
901static char *control_labels[] = SOUND_DEVICE_LABELS;
902static char *control_names[] = SOUND_DEVICE_NAMES;
903
904
905static int
906build_namelists (PyObject *module)
907{
908 PyObject *labels;
909 PyObject *names;
910 PyObject *s;
911 int num_controls;
912 int i;
913
914 num_controls = sizeof(control_labels) / sizeof(control_labels[0]);
915 assert(num_controls == sizeof(control_names) / sizeof(control_names[0]));
916
917 labels = PyList_New(num_controls);
918 names = PyList_New(num_controls);
919 if (labels == NULL || names == NULL)
920 goto error2;
921 for (i = 0; i < num_controls; i++) {
922 s = PyString_FromString(control_labels[i]);
923 if (s == NULL)
924 goto error2;
925 PyList_SET_ITEM(labels, i, s);
926
927 s = PyString_FromString(control_names[i]);
928 if (s == NULL)
929 goto error2;
930 PyList_SET_ITEM(names, i, s);
931 }
932
933 if (PyModule_AddObject(module, "control_labels", labels) == -1)
934 goto error2;
935 if (PyModule_AddObject(module, "control_names", names) == -1)
936 goto error1;
937
938 return 0;
939
940error2:
941 Py_XDECREF(labels);
942error1:
943 Py_XDECREF(names);
944 return -1;
945}
946
947
948void
949initossaudiodev(void)
950{
951 PyObject *m;
952
953 m = Py_InitModule("ossaudiodev", ossaudiodev_methods);
954 if (m == NULL)
955 return;
956
957 OSSAudioError = PyErr_NewException("ossaudiodev.OSSAudioError",
958 NULL, NULL);
959 if (OSSAudioError) {
960 /* Each call to PyModule_AddObject decrefs it; compensate: */
961 Py_INCREF(OSSAudioError);
962 Py_INCREF(OSSAudioError);
963 PyModule_AddObject(m, "error", OSSAudioError);
964 PyModule_AddObject(m, "OSSAudioError", OSSAudioError);
965 }
966
967 /* Build 'control_labels' and 'control_names' lists and add them
968 to the module. */
969 if (build_namelists(m) == -1) /* XXX what to do here? */
970 return;
971
972 /* Expose the audio format numbers -- essential! */
973 _EXPORT_INT(m, AFMT_QUERY);
974 _EXPORT_INT(m, AFMT_MU_LAW);
975 _EXPORT_INT(m, AFMT_A_LAW);
976 _EXPORT_INT(m, AFMT_IMA_ADPCM);
977 _EXPORT_INT(m, AFMT_U8);
978 _EXPORT_INT(m, AFMT_S16_LE);
979 _EXPORT_INT(m, AFMT_S16_BE);
980 _EXPORT_INT(m, AFMT_S8);
981 _EXPORT_INT(m, AFMT_U16_LE);
982 _EXPORT_INT(m, AFMT_U16_BE);
983 _EXPORT_INT(m, AFMT_MPEG);
984#ifdef AFMT_AC3
985 _EXPORT_INT(m, AFMT_AC3);
986#endif
987#ifdef AFMT_S16_NE
988 _EXPORT_INT(m, AFMT_S16_NE);
989#endif
990#ifdef AFMT_U16_NE
991 _EXPORT_INT(m, AFMT_U16_NE);
992#endif
993#ifdef AFMT_S32_LE
994 _EXPORT_INT(m, AFMT_S32_LE);
995#endif
996#ifdef AFMT_S32_BE
997 _EXPORT_INT(m, AFMT_S32_BE);
998#endif
999#ifdef AFMT_MPEG
1000 _EXPORT_INT(m, AFMT_MPEG);
1001#endif
1002
1003 /* Expose the sound mixer device numbers. */
1004 _EXPORT_INT(m, SOUND_MIXER_NRDEVICES);
1005 _EXPORT_INT(m, SOUND_MIXER_VOLUME);
1006 _EXPORT_INT(m, SOUND_MIXER_BASS);
1007 _EXPORT_INT(m, SOUND_MIXER_TREBLE);
1008 _EXPORT_INT(m, SOUND_MIXER_SYNTH);
1009 _EXPORT_INT(m, SOUND_MIXER_PCM);
1010 _EXPORT_INT(m, SOUND_MIXER_SPEAKER);
1011 _EXPORT_INT(m, SOUND_MIXER_LINE);
1012 _EXPORT_INT(m, SOUND_MIXER_MIC);
1013 _EXPORT_INT(m, SOUND_MIXER_CD);
1014 _EXPORT_INT(m, SOUND_MIXER_IMIX);
1015 _EXPORT_INT(m, SOUND_MIXER_ALTPCM);
1016 _EXPORT_INT(m, SOUND_MIXER_RECLEV);
1017 _EXPORT_INT(m, SOUND_MIXER_IGAIN);
1018 _EXPORT_INT(m, SOUND_MIXER_OGAIN);
1019 _EXPORT_INT(m, SOUND_MIXER_LINE1);
1020 _EXPORT_INT(m, SOUND_MIXER_LINE2);
1021 _EXPORT_INT(m, SOUND_MIXER_LINE3);
1022#ifdef SOUND_MIXER_DIGITAL1
1023 _EXPORT_INT(m, SOUND_MIXER_DIGITAL1);
1024#endif
1025#ifdef SOUND_MIXER_DIGITAL2
1026 _EXPORT_INT(m, SOUND_MIXER_DIGITAL2);
1027#endif
1028#ifdef SOUND_MIXER_DIGITAL3
1029 _EXPORT_INT(m, SOUND_MIXER_DIGITAL3);
1030#endif
1031#ifdef SOUND_MIXER_PHONEIN
1032 _EXPORT_INT(m, SOUND_MIXER_PHONEIN);
1033#endif
1034#ifdef SOUND_MIXER_PHONEOUT
1035 _EXPORT_INT(m, SOUND_MIXER_PHONEOUT);
1036#endif
1037#ifdef SOUND_MIXER_VIDEO
1038 _EXPORT_INT(m, SOUND_MIXER_VIDEO);
1039#endif
1040#ifdef SOUND_MIXER_RADIO
1041 _EXPORT_INT(m, SOUND_MIXER_RADIO);
1042#endif
1043#ifdef SOUND_MIXER_MONITOR
1044 _EXPORT_INT(m, SOUND_MIXER_MONITOR);
1045#endif
1046
1047 /* Expose all the ioctl numbers for masochists who like to do this
1048 stuff directly. */
1049 _EXPORT_INT(m, SNDCTL_COPR_HALT);
1050 _EXPORT_INT(m, SNDCTL_COPR_LOAD);
1051 _EXPORT_INT(m, SNDCTL_COPR_RCODE);
1052 _EXPORT_INT(m, SNDCTL_COPR_RCVMSG);
1053 _EXPORT_INT(m, SNDCTL_COPR_RDATA);
1054 _EXPORT_INT(m, SNDCTL_COPR_RESET);
1055 _EXPORT_INT(m, SNDCTL_COPR_RUN);
1056 _EXPORT_INT(m, SNDCTL_COPR_SENDMSG);
1057 _EXPORT_INT(m, SNDCTL_COPR_WCODE);
1058 _EXPORT_INT(m, SNDCTL_COPR_WDATA);
1059#ifdef SNDCTL_DSP_BIND_CHANNEL
1060 _EXPORT_INT(m, SNDCTL_DSP_BIND_CHANNEL);
1061#endif
1062 _EXPORT_INT(m, SNDCTL_DSP_CHANNELS);
1063 _EXPORT_INT(m, SNDCTL_DSP_GETBLKSIZE);
1064 _EXPORT_INT(m, SNDCTL_DSP_GETCAPS);
1065#ifdef SNDCTL_DSP_GETCHANNELMASK
1066 _EXPORT_INT(m, SNDCTL_DSP_GETCHANNELMASK);
1067#endif
1068 _EXPORT_INT(m, SNDCTL_DSP_GETFMTS);
1069 _EXPORT_INT(m, SNDCTL_DSP_GETIPTR);
1070 _EXPORT_INT(m, SNDCTL_DSP_GETISPACE);
1071#ifdef SNDCTL_DSP_GETODELAY
1072 _EXPORT_INT(m, SNDCTL_DSP_GETODELAY);
1073#endif
1074 _EXPORT_INT(m, SNDCTL_DSP_GETOPTR);
1075 _EXPORT_INT(m, SNDCTL_DSP_GETOSPACE);
1076#ifdef SNDCTL_DSP_GETSPDIF
1077 _EXPORT_INT(m, SNDCTL_DSP_GETSPDIF);
1078#endif
1079 _EXPORT_INT(m, SNDCTL_DSP_GETTRIGGER);
1080 _EXPORT_INT(m, SNDCTL_DSP_MAPINBUF);
1081 _EXPORT_INT(m, SNDCTL_DSP_MAPOUTBUF);
1082 _EXPORT_INT(m, SNDCTL_DSP_NONBLOCK);
1083 _EXPORT_INT(m, SNDCTL_DSP_POST);
1084#ifdef SNDCTL_DSP_PROFILE
1085 _EXPORT_INT(m, SNDCTL_DSP_PROFILE);
1086#endif
1087 _EXPORT_INT(m, SNDCTL_DSP_RESET);
1088 _EXPORT_INT(m, SNDCTL_DSP_SAMPLESIZE);
1089 _EXPORT_INT(m, SNDCTL_DSP_SETDUPLEX);
1090 _EXPORT_INT(m, SNDCTL_DSP_SETFMT);
1091 _EXPORT_INT(m, SNDCTL_DSP_SETFRAGMENT);
1092#ifdef SNDCTL_DSP_SETSPDIF
1093 _EXPORT_INT(m, SNDCTL_DSP_SETSPDIF);
1094#endif
1095 _EXPORT_INT(m, SNDCTL_DSP_SETSYNCRO);
1096 _EXPORT_INT(m, SNDCTL_DSP_SETTRIGGER);
1097 _EXPORT_INT(m, SNDCTL_DSP_SPEED);
1098 _EXPORT_INT(m, SNDCTL_DSP_STEREO);
1099 _EXPORT_INT(m, SNDCTL_DSP_SUBDIVIDE);
1100 _EXPORT_INT(m, SNDCTL_DSP_SYNC);
1101 _EXPORT_INT(m, SNDCTL_FM_4OP_ENABLE);
1102 _EXPORT_INT(m, SNDCTL_FM_LOAD_INSTR);
1103 _EXPORT_INT(m, SNDCTL_MIDI_INFO);
1104 _EXPORT_INT(m, SNDCTL_MIDI_MPUCMD);
1105 _EXPORT_INT(m, SNDCTL_MIDI_MPUMODE);
1106 _EXPORT_INT(m, SNDCTL_MIDI_PRETIME);
1107 _EXPORT_INT(m, SNDCTL_SEQ_CTRLRATE);
1108 _EXPORT_INT(m, SNDCTL_SEQ_GETINCOUNT);
1109 _EXPORT_INT(m, SNDCTL_SEQ_GETOUTCOUNT);
1110#ifdef SNDCTL_SEQ_GETTIME
1111 _EXPORT_INT(m, SNDCTL_SEQ_GETTIME);
1112#endif
1113 _EXPORT_INT(m, SNDCTL_SEQ_NRMIDIS);
1114 _EXPORT_INT(m, SNDCTL_SEQ_NRSYNTHS);
1115 _EXPORT_INT(m, SNDCTL_SEQ_OUTOFBAND);
1116 _EXPORT_INT(m, SNDCTL_SEQ_PANIC);
1117 _EXPORT_INT(m, SNDCTL_SEQ_PERCMODE);
1118 _EXPORT_INT(m, SNDCTL_SEQ_RESET);
1119 _EXPORT_INT(m, SNDCTL_SEQ_RESETSAMPLES);
1120 _EXPORT_INT(m, SNDCTL_SEQ_SYNC);
1121 _EXPORT_INT(m, SNDCTL_SEQ_TESTMIDI);
1122 _EXPORT_INT(m, SNDCTL_SEQ_THRESHOLD);
1123#ifdef SNDCTL_SYNTH_CONTROL
1124 _EXPORT_INT(m, SNDCTL_SYNTH_CONTROL);
1125#endif
1126#ifdef SNDCTL_SYNTH_ID
1127 _EXPORT_INT(m, SNDCTL_SYNTH_ID);
1128#endif
1129 _EXPORT_INT(m, SNDCTL_SYNTH_INFO);
1130 _EXPORT_INT(m, SNDCTL_SYNTH_MEMAVL);
1131#ifdef SNDCTL_SYNTH_REMOVESAMPLE
1132 _EXPORT_INT(m, SNDCTL_SYNTH_REMOVESAMPLE);
1133#endif
1134 _EXPORT_INT(m, SNDCTL_TMR_CONTINUE);
1135 _EXPORT_INT(m, SNDCTL_TMR_METRONOME);
1136 _EXPORT_INT(m, SNDCTL_TMR_SELECT);
1137 _EXPORT_INT(m, SNDCTL_TMR_SOURCE);
1138 _EXPORT_INT(m, SNDCTL_TMR_START);
1139 _EXPORT_INT(m, SNDCTL_TMR_STOP);
1140 _EXPORT_INT(m, SNDCTL_TMR_TEMPO);
1141 _EXPORT_INT(m, SNDCTL_TMR_TIMEBASE);
1142}
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