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b0d1b068d9
device and control pseudo-device: - first look for the device filename in the environment variable AUDIODEV. - if not found, use /dev/audio - calculate the control device by tacking "ctl" onto the base device name. We now do this. Also, if the open fails, we call PyErr_SetFromErrnoWithFilename() to give a more informative error message. Added a fileno() method to the audio object returned from open(). This returns the file descriptor which can be used by applications to set up SIGPOLL notification, as per the manpage.
550 lines
12 KiB
C
550 lines
12 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Sad objects */
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#include "Python.h"
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#include "structmember.h"
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#ifdef HAVE_SYS_AUDIOIO_H
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#define SOLARIS
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include <stropts.h>
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#include <sys/ioctl.h>
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#ifdef SOLARIS
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#include <sys/audioio.h>
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#else
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#include <sun/audioio.h>
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#endif
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/* #define offsetof(str,mem) ((int)(((str *)0)->mem)) */
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typedef struct {
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PyObject_HEAD
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int x_fd; /* The open file */
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int x_icount; /* # samples read */
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int x_ocount; /* # samples written */
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int x_isctl; /* True if control device */
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} sadobject;
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typedef struct {
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PyObject_HEAD
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audio_info_t ai;
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} sadstatusobject;
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staticforward PyTypeObject Sadtype;
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staticforward PyTypeObject Sadstatustype;
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static sadstatusobject *sads_alloc(); /* Forward */
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static PyObject *SunAudioError;
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#define is_sadobject(v) ((v)->ob_type == &Sadtype)
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#define is_sadstatusobject(v) ((v)->ob_type == &Sadstatustype)
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static sadobject *
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newsadobject(arg)
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PyObject *arg;
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{
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sadobject *xp;
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int fd;
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char *mode;
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int imode;
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char* basedev;
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char* ctldev;
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char* opendev;
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/* Check arg for r/w/rw */
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if (!PyArg_Parse(arg, "s", &mode))
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return NULL;
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if (strcmp(mode, "r") == 0)
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imode = 0;
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else if (strcmp(mode, "w") == 0)
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imode = 1;
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else if (strcmp(mode, "rw") == 0)
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imode = 2;
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else if (strcmp(mode, "control") == 0)
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imode = -1;
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else {
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PyErr_SetString(SunAudioError,
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"Mode should be one of 'r', 'w', 'rw' or 'control'");
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return NULL;
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}
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/* Open the correct device. The base device name comes from the
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* AUDIODEV environment variable first, then /dev/audio. The
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* control device tacks "ctl" onto the base device name.
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*/
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basedev = getenv("AUDIODEV");
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if (!basedev)
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basedev = "/dev/audio";
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ctldev = PyMem_NEW(char, strlen(basedev) + 4);
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if (!ctldev) {
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PyErr_NoMemory();
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return NULL;
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}
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strcpy(ctldev, basedev);
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strcat(ctldev, "ctl");
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if (imode < 0) {
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opendev = ctldev;
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fd = open(ctldev, 2);
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}
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else {
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opendev = basedev;
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fd = open(basedev, imode);
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}
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if (fd < 0) {
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PyErr_SetFromErrnoWithFilename(SunAudioError, opendev);
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return NULL;
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}
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PyMem_DEL(ctldev);
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/* Create and initialize the object */
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xp = PyObject_NEW(sadobject, &Sadtype);
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if (xp == NULL) {
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close(fd);
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return NULL;
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}
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xp->x_fd = fd;
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xp->x_icount = xp->x_ocount = 0;
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xp->x_isctl = (imode < 0);
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return xp;
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}
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/* Sad methods */
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static void
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sad_dealloc(xp)
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sadobject *xp;
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{
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close(xp->x_fd);
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PyMem_DEL(xp);
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}
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static PyObject *
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sad_read(self, args)
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sadobject *self;
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PyObject *args;
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{
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int size, count;
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char *cp;
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PyObject *rv;
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if (!PyArg_Parse(args, "i", &size))
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return NULL;
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rv = PyString_FromStringAndSize(NULL, size);
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if (rv == NULL)
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return NULL;
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if (!(cp = PyString_AsString(rv)))
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goto finally;
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count = read(self->x_fd, cp, size);
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if (count < 0) {
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PyErr_SetFromErrno(SunAudioError);
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goto finally;
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}
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#if 0
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/* TBD: why print this message if you can handle the condition?
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* assume it's debugging info which we can just as well get rid
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* of. in any case this message should *not* be using printf!
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*/
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if (count != size)
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printf("sunaudio: funny read rv %d wtd %d\n", count, size);
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#endif
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self->x_icount += count;
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return rv;
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finally:
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Py_DECREF(rv);
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return NULL;
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}
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static PyObject *
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sad_write(self, args)
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sadobject *self;
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PyObject *args;
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{
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char *cp;
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int count, size;
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if (!PyArg_Parse(args, "s#", &cp, &size))
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return NULL;
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count = write(self->x_fd, cp, size);
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if (count < 0) {
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PyErr_SetFromErrno(SunAudioError);
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return NULL;
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}
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#if 0
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if (count != size)
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printf("sunaudio: funny write rv %d wanted %d\n", count, size);
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#endif
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self->x_ocount += count;
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject *
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sad_getinfo(self, args)
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sadobject *self;
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PyObject *args;
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{
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sadstatusobject *rv;
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if (!PyArg_Parse(args, ""))
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return NULL;
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if (!(rv = sads_alloc()))
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return NULL;
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if (ioctl(self->x_fd, AUDIO_GETINFO, &rv->ai) < 0) {
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PyErr_SetFromErrno(SunAudioError);
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Py_DECREF(rv);
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return NULL;
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}
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return (PyObject *)rv;
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}
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static PyObject *
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sad_setinfo(self, arg)
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sadobject *self;
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sadstatusobject *arg;
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{
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if (!is_sadstatusobject(arg)) {
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PyErr_SetString(PyExc_TypeError,
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"Must be sun audio status object");
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return NULL;
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}
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if (ioctl(self->x_fd, AUDIO_SETINFO, &arg->ai) < 0) {
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PyErr_SetFromErrno(SunAudioError);
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return NULL;
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}
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject *
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sad_ibufcount(self, args)
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sadobject *self;
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PyObject *args;
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{
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audio_info_t ai;
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if (!PyArg_Parse(args, ""))
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return NULL;
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if (ioctl(self->x_fd, AUDIO_GETINFO, &ai) < 0) {
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PyErr_SetFromErrno(SunAudioError);
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return NULL;
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}
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return PyInt_FromLong(ai.record.samples - self->x_icount);
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}
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static PyObject *
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sad_obufcount(self, args)
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sadobject *self;
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PyObject *args;
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{
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audio_info_t ai;
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if (!PyArg_Parse(args, ""))
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return NULL;
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if (ioctl(self->x_fd, AUDIO_GETINFO, &ai) < 0) {
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PyErr_SetFromErrno(SunAudioError);
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return NULL;
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}
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/* x_ocount is in bytes, wheras play.samples is in frames */
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/* we want frames */
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return PyInt_FromLong(self->x_ocount / (ai.play.channels *
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ai.play.precision / 8) -
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ai.play.samples);
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}
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static PyObject *
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sad_drain(self, args)
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sadobject *self;
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PyObject *args;
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{
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if (!PyArg_Parse(args, ""))
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return NULL;
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if (ioctl(self->x_fd, AUDIO_DRAIN, 0) < 0) {
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PyErr_SetFromErrno(SunAudioError);
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return NULL;
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}
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Py_INCREF(Py_None);
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return Py_None;
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}
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#ifdef SOLARIS
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static PyObject *
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sad_getdev(self, args)
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sadobject *self;
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PyObject *args;
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{
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struct audio_device ad;
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if (!PyArg_Parse(args, ""))
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return NULL;
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if (ioctl(self->x_fd, AUDIO_GETDEV, &ad) < 0) {
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PyErr_SetFromErrno(SunAudioError);
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return NULL;
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}
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return Py_BuildValue("(sss)", ad.name, ad.version, ad.config);
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}
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#endif
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static PyObject *
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sad_flush(self, args)
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sadobject *self;
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PyObject *args;
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{
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if (!PyArg_Parse(args, ""))
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return NULL;
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if (ioctl(self->x_fd, I_FLUSH, FLUSHW) < 0) {
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PyErr_SetFromErrno(SunAudioError);
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return NULL;
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}
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject *
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sad_close(self, args)
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sadobject *self;
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PyObject *args;
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{
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if (!PyArg_Parse(args, ""))
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return NULL;
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if (self->x_fd >= 0) {
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close(self->x_fd);
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self->x_fd = -1;
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}
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyObject *
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sad_fileno(self, args)
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sadobject *self;
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PyObject *args;
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{
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if (!PyArg_Parse(args, ""))
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return NULL;
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return PyInt_FromLong(self->x_fd);
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}
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static PyMethodDef sad_methods[] = {
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{ "read", (PyCFunction)sad_read },
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{ "write", (PyCFunction)sad_write },
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{ "ibufcount", (PyCFunction)sad_ibufcount },
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{ "obufcount", (PyCFunction)sad_obufcount },
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#define CTL_METHODS 4
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{ "getinfo", (PyCFunction)sad_getinfo },
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{ "setinfo", (PyCFunction)sad_setinfo },
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{ "drain", (PyCFunction)sad_drain },
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{ "flush", (PyCFunction)sad_flush },
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#ifdef SOLARIS
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{ "getdev", (PyCFunction)sad_getdev },
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#endif
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{ "close", (PyCFunction)sad_close },
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{ "fileno", (PyCFunction)sad_fileno },
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{NULL, NULL} /* sentinel */
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};
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static PyObject *
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sad_getattr(xp, name)
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sadobject *xp;
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char *name;
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{
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if (xp->x_isctl)
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return Py_FindMethod(sad_methods+CTL_METHODS,
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(PyObject *)xp, name);
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else
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return Py_FindMethod(sad_methods, (PyObject *)xp, name);
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}
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/* ----------------------------------------------------------------- */
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static sadstatusobject *
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sads_alloc() {
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return PyObject_NEW(sadstatusobject, &Sadstatustype);
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}
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static void
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sads_dealloc(xp)
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sadstatusobject *xp;
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{
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PyMem_DEL(xp);
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}
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#define OFF(x) offsetof(audio_info_t,x)
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static struct memberlist sads_ml[] = {
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{ "i_sample_rate", T_UINT, OFF(record.sample_rate) },
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{ "i_channels", T_UINT, OFF(record.channels) },
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{ "i_precision", T_UINT, OFF(record.precision) },
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{ "i_encoding", T_UINT, OFF(record.encoding) },
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{ "i_gain", T_UINT, OFF(record.gain) },
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{ "i_port", T_UINT, OFF(record.port) },
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{ "i_samples", T_UINT, OFF(record.samples) },
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{ "i_eof", T_UINT, OFF(record.eof) },
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{ "i_pause", T_UBYTE, OFF(record.pause) },
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{ "i_error", T_UBYTE, OFF(record.error) },
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{ "i_waiting", T_UBYTE, OFF(record.waiting) },
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{ "i_open", T_UBYTE, OFF(record.open) , RO},
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{ "i_active", T_UBYTE, OFF(record.active) , RO},
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#ifdef SOLARIS
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{ "i_buffer_size", T_UINT, OFF(record.buffer_size) },
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{ "i_balance", T_UBYTE, OFF(record.balance) },
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{ "i_avail_ports", T_UINT, OFF(record.avail_ports) },
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#endif
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{ "o_sample_rate", T_UINT, OFF(play.sample_rate) },
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{ "o_channels", T_UINT, OFF(play.channels) },
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{ "o_precision", T_UINT, OFF(play.precision) },
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{ "o_encoding", T_UINT, OFF(play.encoding) },
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{ "o_gain", T_UINT, OFF(play.gain) },
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{ "o_port", T_UINT, OFF(play.port) },
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{ "o_samples", T_UINT, OFF(play.samples) },
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{ "o_eof", T_UINT, OFF(play.eof) },
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{ "o_pause", T_UBYTE, OFF(play.pause) },
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{ "o_error", T_UBYTE, OFF(play.error) },
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{ "o_waiting", T_UBYTE, OFF(play.waiting) },
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{ "o_open", T_UBYTE, OFF(play.open) , RO},
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{ "o_active", T_UBYTE, OFF(play.active) , RO},
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#ifdef SOLARIS
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{ "o_buffer_size", T_UINT, OFF(play.buffer_size) },
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{ "o_balance", T_UBYTE, OFF(play.balance) },
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{ "o_avail_ports", T_UINT, OFF(play.avail_ports) },
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#endif
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{ "monitor_gain", T_UINT, OFF(monitor_gain) },
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{ NULL, 0, 0},
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};
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static PyObject *
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sads_getattr(xp, name)
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sadstatusobject *xp;
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char *name;
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{
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return PyMember_Get((char *)&xp->ai, sads_ml, name);
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}
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static int
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sads_setattr(xp, name, v)
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sadstatusobject *xp;
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char *name;
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PyObject *v;
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{
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if (v == NULL) {
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PyErr_SetString(PyExc_TypeError,
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"can't delete sun audio status attributes");
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return -1;
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}
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return PyMember_Set((char *)&xp->ai, sads_ml, name, v);
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}
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/* ------------------------------------------------------------------- */
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static PyTypeObject Sadtype = {
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PyObject_HEAD_INIT(&PyType_Type)
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0, /*ob_size*/
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"sun_audio_device", /*tp_name*/
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sizeof(sadobject), /*tp_size*/
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0, /*tp_itemsize*/
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/* methods */
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(destructor)sad_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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(getattrfunc)sad_getattr, /*tp_getattr*/
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0, /*tp_setattr*/
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0, /*tp_compare*/
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0, /*tp_repr*/
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};
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static PyTypeObject Sadstatustype = {
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PyObject_HEAD_INIT(&PyType_Type)
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0, /*ob_size*/
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"sun_audio_device_status", /*tp_name*/
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sizeof(sadstatusobject), /*tp_size*/
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0, /*tp_itemsize*/
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/* methods */
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(destructor)sads_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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(getattrfunc)sads_getattr, /*tp_getattr*/
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(setattrfunc)sads_setattr, /*tp_setattr*/
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0, /*tp_compare*/
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0, /*tp_repr*/
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};
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/* ------------------------------------------------------------------- */
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static PyObject *
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sadopen(self, args)
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PyObject *self;
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PyObject *args;
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{
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return (PyObject *)newsadobject(args);
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}
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|
|
static PyMethodDef sunaudiodev_methods[] = {
|
|
{ "open", sadopen },
|
|
{ 0, 0 },
|
|
};
|
|
|
|
void
|
|
initsunaudiodev()
|
|
{
|
|
PyObject *m, *d;
|
|
|
|
m = Py_InitModule("sunaudiodev", sunaudiodev_methods);
|
|
d = PyModule_GetDict(m);
|
|
SunAudioError = PyErr_NewException("sunaudiodev.error", NULL, NULL);
|
|
if (SunAudioError)
|
|
PyDict_SetItemString(d, "error", SunAudioError);
|
|
}
|