/* * ossaudiodev -- Python interface to the OSS (Open Sound System) API. * This is the standard audio API for Linux and some * flavours of BSD [XXX which ones?]; it is also available * for a wide range of commercial Unices. * * Originally written by Peter Bosch, March 2000, as linuxaudiodev. * * Renamed to ossaudiodev and rearranged/revised/hacked up * by Greg Ward , November 2002. * Mixer interface by Nicholas FitzRoy-Dale , Dec 2002. * * (c) 2000 Peter Bosch. All Rights Reserved. * (c) 2002 Gregory P. Ward. All Rights Reserved. * (c) 2002 Python Software Foundation. All Rights Reserved. * * XXX need a license statement * * $Id$ */ #include "Python.h" #include "structmember.h" #ifdef HAVE_FCNTL_H #include #else #define O_RDONLY 00 #define O_WRONLY 01 #endif #include #include #if defined(linux) #ifndef HAVE_STDINT_H typedef unsigned long uint32_t; #endif #elif defined(__FreeBSD__) # ifndef SNDCTL_DSP_CHANNELS # define SNDCTL_DSP_CHANNELS SOUND_PCM_WRITE_CHANNELS # endif #endif typedef struct { PyObject_HEAD char *devicename; /* name of the device file */ int fd; /* file descriptor */ int mode; /* file mode (O_RDONLY, etc.) */ int icount; /* input count */ int ocount; /* output count */ uint32_t afmts; /* audio formats supported by hardware */ } oss_audio_t; typedef struct { PyObject_HEAD int fd; /* The open mixer device */ } oss_mixer_t; static PyTypeObject OSSAudioType; static PyTypeObject OSSMixerType; static PyObject *OSSAudioError; /* ---------------------------------------------------------------------- * DSP object initialization/deallocation */ static oss_audio_t * newossobject(PyObject *arg) { oss_audio_t *self; int fd, afmts, imode; char *devicename = NULL; char *mode = NULL; /* Two ways to call open(): open(device, mode) (for consistency with builtin open()) open(mode) (for backwards compatibility) because the *first* argument is optional, parsing args is a wee bit tricky. */ if (!PyArg_ParseTuple(arg, "s|s:open", &devicename, &mode)) return NULL; if (mode == NULL) { /* only one arg supplied */ mode = devicename; devicename = NULL; } if (strcmp(mode, "r") == 0) imode = O_RDONLY; else if (strcmp(mode, "w") == 0) imode = O_WRONLY; else if (strcmp(mode, "rw") == 0) imode = O_RDWR; else { PyErr_SetString(OSSAudioError, "mode must be 'r', 'w', or 'rw'"); return NULL; } /* Open the correct device: either the 'device' argument, or the AUDIODEV environment variable, or "/dev/dsp". */ if (devicename == NULL) { /* called with one arg */ devicename = getenv("AUDIODEV"); if (devicename == NULL) /* $AUDIODEV not set */ devicename = "/dev/dsp"; } /* Open with O_NONBLOCK to avoid hanging on devices that only allow one open at a time. This does *not* affect later I/O; OSS provides a special ioctl() for non-blocking read/write, which is exposed via oss_nonblock() below. */ if ((fd = open(devicename, imode|O_NONBLOCK)) == -1) { PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename); return NULL; } /* And (try to) put it back in blocking mode so we get the expected write() semantics. */ if (fcntl(fd, F_SETFL, 0) == -1) { close(fd); PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename); return NULL; } if (ioctl(fd, SNDCTL_DSP_GETFMTS, &afmts) == -1) { PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename); return NULL; } /* Create and initialize the object */ if ((self = PyObject_New(oss_audio_t, &OSSAudioType)) == NULL) { close(fd); return NULL; } self->devicename = devicename; self->fd = fd; self->mode = imode; self->icount = self->ocount = 0; self->afmts = afmts; return self; } static void oss_dealloc(oss_audio_t *self) { /* if already closed, don't reclose it */ if (self->fd != -1) close(self->fd); PyObject_Del(self); } /* ---------------------------------------------------------------------- * Mixer object initialization/deallocation */ static oss_mixer_t * newossmixerobject(PyObject *arg) { char *devicename = NULL; int fd; oss_mixer_t *self; if (!PyArg_ParseTuple(arg, "|s", &devicename)) { return NULL; } if (devicename == NULL) { devicename = getenv("MIXERDEV"); if (devicename == NULL) /* MIXERDEV not set */ devicename = "/dev/mixer"; } if ((fd = open(devicename, O_RDWR)) == -1) { PyErr_SetFromErrnoWithFilename(PyExc_IOError, devicename); return NULL; } if ((self = PyObject_New(oss_mixer_t, &OSSMixerType)) == NULL) { close(fd); return NULL; } self->fd = fd; return self; } static void oss_mixer_dealloc(oss_mixer_t *self) { /* if already closed, don't reclose it */ if (self->fd != -1) close(self->fd); PyObject_Del(self); } /* Methods to wrap the OSS ioctls. The calling convention is pretty simple: nonblock() -> ioctl(fd, SNDCTL_DSP_NONBLOCK) fmt = setfmt(fmt) -> ioctl(fd, SNDCTL_DSP_SETFMT, &fmt) etc. */ /* ---------------------------------------------------------------------- * Helper functions */ /* Check if a given file descriptor is valid (i.e. hasn't been closed). * If true, return 1. Otherwise, raise ValueError and return 0. */ static int _is_fd_valid(int fd) { /* the FD is set to -1 in oss_close()/oss_mixer_close() */ if (fd >= 0) { return 1; } else { PyErr_SetString(PyExc_ValueError, "Operation on closed OSS device."); return 0; } } /* _do_ioctl_1() is a private helper function used for the OSS ioctls -- SNDCTL_DSP_{SETFMT,CHANNELS,SPEED} -- that that are called from C like this: ioctl(fd, SNDCTL_DSP_cmd, &arg) where arg is the value to set, and on return the driver sets arg to the value that was actually set. Mapping this to Python is obvious: arg = dsp.xxx(arg) */ static PyObject * _do_ioctl_1(int fd, PyObject *args, char *fname, int cmd) { char argfmt[33] = "i:"; int arg; assert(strlen(fname) <= 30); strcat(argfmt, fname); if (!PyArg_ParseTuple(args, argfmt, &arg)) return NULL; if (ioctl(fd, cmd, &arg) == -1) return PyErr_SetFromErrno(PyExc_IOError); return PyLong_FromLong(arg); } /* _do_ioctl_1_internal() is a wrapper for ioctls that take no inputs but return an output -- ie. we need to pass a pointer to a local C variable so the driver can write its output there, but from Python all we see is the return value. For example, SOUND_MIXER_READ_DEVMASK returns a bitmask of available mixer devices, but does not use the value of the parameter passed-in in any way. */ static PyObject * _do_ioctl_1_internal(int fd, PyObject *args, char *fname, int cmd) { char argfmt[32] = ":"; int arg = 0; assert(strlen(fname) <= 30); strcat(argfmt, fname); if (!PyArg_ParseTuple(args, argfmt, &arg)) return NULL; if (ioctl(fd, cmd, &arg) == -1) return PyErr_SetFromErrno(PyExc_IOError); return PyLong_FromLong(arg); } /* _do_ioctl_0() is a private helper for the no-argument ioctls: SNDCTL_DSP_{SYNC,RESET,POST}. */ static PyObject * _do_ioctl_0(int fd, PyObject *args, char *fname, int cmd) { char argfmt[32] = ":"; int rv; assert(strlen(fname) <= 30); strcat(argfmt, fname); if (!PyArg_ParseTuple(args, argfmt)) return NULL; /* According to hannu@opensound.com, all three of the ioctls that use this function can block, so release the GIL. This is especially important for SYNC, which can block for several seconds. */ Py_BEGIN_ALLOW_THREADS rv = ioctl(fd, cmd, 0); Py_END_ALLOW_THREADS if (rv == -1) return PyErr_SetFromErrno(PyExc_IOError); Py_INCREF(Py_None); return Py_None; } /* ---------------------------------------------------------------------- * Methods of DSP objects (OSSAudioType) */ static PyObject * oss_nonblock(oss_audio_t *self, PyObject *unused) { if (!_is_fd_valid(self->fd)) return NULL; /* Hmmm: it doesn't appear to be possible to return to blocking mode once we're in non-blocking mode! */ if (ioctl(self->fd, SNDCTL_DSP_NONBLOCK, NULL) == -1) return PyErr_SetFromErrno(PyExc_IOError); Py_INCREF(Py_None); return Py_None; } static PyObject * oss_setfmt(oss_audio_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_1(self->fd, args, "setfmt", SNDCTL_DSP_SETFMT); } static PyObject * oss_getfmts(oss_audio_t *self, PyObject *unused) { int mask; if (!_is_fd_valid(self->fd)) return NULL; if (ioctl(self->fd, SNDCTL_DSP_GETFMTS, &mask) == -1) return PyErr_SetFromErrno(PyExc_IOError); return PyLong_FromLong(mask); } static PyObject * oss_channels(oss_audio_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_1(self->fd, args, "channels", SNDCTL_DSP_CHANNELS); } static PyObject * oss_speed(oss_audio_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_1(self->fd, args, "speed", SNDCTL_DSP_SPEED); } static PyObject * oss_sync(oss_audio_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_0(self->fd, args, "sync", SNDCTL_DSP_SYNC); } static PyObject * oss_reset(oss_audio_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_0(self->fd, args, "reset", SNDCTL_DSP_RESET); } static PyObject * oss_post(oss_audio_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_0(self->fd, args, "post", SNDCTL_DSP_POST); } /* Regular file methods: read(), write(), close(), etc. as well as one convenience method, writeall(). */ static PyObject * oss_read(oss_audio_t *self, PyObject *args) { int size, count; char *cp; PyObject *rv; if (!_is_fd_valid(self->fd)) return NULL; if (!PyArg_ParseTuple(args, "i:read", &size)) return NULL; rv = PyBytes_FromStringAndSize(NULL, size); if (rv == NULL) return NULL; cp = PyBytes_AS_STRING(rv); Py_BEGIN_ALLOW_THREADS count = read(self->fd, cp, size); Py_END_ALLOW_THREADS if (count < 0) { PyErr_SetFromErrno(PyExc_IOError); Py_DECREF(rv); return NULL; } self->icount += count; _PyBytes_Resize(&rv, count); return rv; } static PyObject * oss_write(oss_audio_t *self, PyObject *args) { char *cp; int rv, size; if (!_is_fd_valid(self->fd)) return NULL; if (!PyArg_ParseTuple(args, "y#:write", &cp, &size)) { return NULL; } Py_BEGIN_ALLOW_THREADS rv = write(self->fd, cp, size); Py_END_ALLOW_THREADS if (rv == -1) { return PyErr_SetFromErrno(PyExc_IOError); } else { self->ocount += rv; } return PyLong_FromLong(rv); } static PyObject * oss_writeall(oss_audio_t *self, PyObject *args) { char *cp; int rv, size; fd_set write_set_fds; int select_rv; /* NB. writeall() is only useful in non-blocking mode: according to Guenter Geiger on the linux-audio-dev list (http://eca.cx/lad/2002/11/0380.html), OSS guarantees that write() in blocking mode consumes the whole buffer. In blocking mode, the behaviour of write() and writeall() from Python is indistinguishable. */ if (!_is_fd_valid(self->fd)) return NULL; if (!PyArg_ParseTuple(args, "y#:write", &cp, &size)) return NULL; if (!_PyIsSelectable_fd(self->fd)) { PyErr_SetString(PyExc_ValueError, "file descriptor out of range for select"); return NULL; } /* use select to wait for audio device to be available */ FD_ZERO(&write_set_fds); FD_SET(self->fd, &write_set_fds); while (size > 0) { Py_BEGIN_ALLOW_THREADS select_rv = select(self->fd+1, NULL, &write_set_fds, NULL, NULL); Py_END_ALLOW_THREADS assert(select_rv != 0); /* no timeout, can't expire */ if (select_rv == -1) return PyErr_SetFromErrno(PyExc_IOError); Py_BEGIN_ALLOW_THREADS rv = write(self->fd, cp, size); Py_END_ALLOW_THREADS if (rv == -1) { if (errno == EAGAIN) { /* buffer is full, try again */ errno = 0; continue; } else /* it's a real error */ return PyErr_SetFromErrno(PyExc_IOError); } else { /* wrote rv bytes */ self->ocount += rv; size -= rv; cp += rv; } } Py_INCREF(Py_None); return Py_None; } static PyObject * oss_close(oss_audio_t *self, PyObject *unused) { if (self->fd >= 0) { Py_BEGIN_ALLOW_THREADS close(self->fd); Py_END_ALLOW_THREADS self->fd = -1; } Py_INCREF(Py_None); return Py_None; } static PyObject * oss_self(PyObject *self, PyObject *unused) { Py_INCREF(self); return self; } static PyObject * oss_exit(PyObject *self, PyObject *unused) { PyObject *ret = PyObject_CallMethod(self, "close", NULL); if (!ret) return NULL; Py_DECREF(ret); Py_RETURN_NONE; } static PyObject * oss_fileno(oss_audio_t *self, PyObject *unused) { if (!_is_fd_valid(self->fd)) return NULL; return PyLong_FromLong(self->fd); } /* Convenience methods: these generally wrap a couple of ioctls into one common task. */ static PyObject * oss_setparameters(oss_audio_t *self, PyObject *args) { int wanted_fmt, wanted_channels, wanted_rate, strict=0; int fmt, channels, rate; PyObject * rv; /* return tuple (fmt, channels, rate) */ if (!_is_fd_valid(self->fd)) return NULL; if (!PyArg_ParseTuple(args, "iii|i:setparameters", &wanted_fmt, &wanted_channels, &wanted_rate, &strict)) return NULL; fmt = wanted_fmt; if (ioctl(self->fd, SNDCTL_DSP_SETFMT, &fmt) == -1) { return PyErr_SetFromErrno(PyExc_IOError); } if (strict && fmt != wanted_fmt) { return PyErr_Format (OSSAudioError, "unable to set requested format (wanted %d, got %d)", wanted_fmt, fmt); } channels = wanted_channels; if (ioctl(self->fd, SNDCTL_DSP_CHANNELS, &channels) == -1) { return PyErr_SetFromErrno(PyExc_IOError); } if (strict && channels != wanted_channels) { return PyErr_Format (OSSAudioError, "unable to set requested channels (wanted %d, got %d)", wanted_channels, channels); } rate = wanted_rate; if (ioctl(self->fd, SNDCTL_DSP_SPEED, &rate) == -1) { return PyErr_SetFromErrno(PyExc_IOError); } if (strict && rate != wanted_rate) { return PyErr_Format (OSSAudioError, "unable to set requested rate (wanted %d, got %d)", wanted_rate, rate); } /* Construct the return value: a (fmt, channels, rate) tuple that tells what the audio hardware was actually set to. */ rv = PyTuple_New(3); if (rv == NULL) return NULL; PyTuple_SET_ITEM(rv, 0, PyLong_FromLong(fmt)); PyTuple_SET_ITEM(rv, 1, PyLong_FromLong(channels)); PyTuple_SET_ITEM(rv, 2, PyLong_FromLong(rate)); return rv; } static int _ssize(oss_audio_t *self, int *nchannels, int *ssize) { int fmt; fmt = 0; if (ioctl(self->fd, SNDCTL_DSP_SETFMT, &fmt) < 0) return -errno; switch (fmt) { case AFMT_MU_LAW: case AFMT_A_LAW: case AFMT_U8: case AFMT_S8: *ssize = 1; /* 8 bit formats: 1 byte */ break; case AFMT_S16_LE: case AFMT_S16_BE: case AFMT_U16_LE: case AFMT_U16_BE: *ssize = 2; /* 16 bit formats: 2 byte */ break; case AFMT_MPEG: case AFMT_IMA_ADPCM: default: return -EOPNOTSUPP; } if (ioctl(self->fd, SNDCTL_DSP_CHANNELS, nchannels) < 0) return -errno; return 0; } /* bufsize returns the size of the hardware audio buffer in number of samples */ static PyObject * oss_bufsize(oss_audio_t *self, PyObject *unused) { audio_buf_info ai; int nchannels=0, ssize=0; if (!_is_fd_valid(self->fd)) return NULL; if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } return PyLong_FromLong((ai.fragstotal * ai.fragsize) / (nchannels * ssize)); } /* obufcount returns the number of samples that are available in the hardware for playing */ static PyObject * oss_obufcount(oss_audio_t *self, PyObject *unused) { audio_buf_info ai; int nchannels=0, ssize=0; if (!_is_fd_valid(self->fd)) return NULL; if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } return PyLong_FromLong((ai.fragstotal * ai.fragsize - ai.bytes) / (ssize * nchannels)); } /* obufcount returns the number of samples that can be played without blocking */ static PyObject * oss_obuffree(oss_audio_t *self, PyObject *unused) { audio_buf_info ai; int nchannels=0, ssize=0; if (!_is_fd_valid(self->fd)) return NULL; if (_ssize(self, &nchannels, &ssize) < 0 || !nchannels || !ssize) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } return PyLong_FromLong(ai.bytes / (ssize * nchannels)); } static PyObject * oss_getptr(oss_audio_t *self, PyObject *unused) { count_info info; int req; if (!_is_fd_valid(self->fd)) return NULL; if (self->mode == O_RDONLY) req = SNDCTL_DSP_GETIPTR; else req = SNDCTL_DSP_GETOPTR; if (ioctl(self->fd, req, &info) == -1) { PyErr_SetFromErrno(PyExc_IOError); return NULL; } return Py_BuildValue("iii", info.bytes, info.blocks, info.ptr); } /* ---------------------------------------------------------------------- * Methods of mixer objects (OSSMixerType) */ static PyObject * oss_mixer_close(oss_mixer_t *self, PyObject *unused) { if (self->fd >= 0) { close(self->fd); self->fd = -1; } Py_INCREF(Py_None); return Py_None; } static PyObject * oss_mixer_fileno(oss_mixer_t *self, PyObject *unused) { if (!_is_fd_valid(self->fd)) return NULL; return PyLong_FromLong(self->fd); } /* Simple mixer interface methods */ static PyObject * oss_mixer_controls(oss_mixer_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_1_internal(self->fd, args, "controls", SOUND_MIXER_READ_DEVMASK); } static PyObject * oss_mixer_stereocontrols(oss_mixer_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_1_internal(self->fd, args, "stereocontrols", SOUND_MIXER_READ_STEREODEVS); } static PyObject * oss_mixer_reccontrols(oss_mixer_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_1_internal(self->fd, args, "reccontrols", SOUND_MIXER_READ_RECMASK); } static PyObject * oss_mixer_get(oss_mixer_t *self, PyObject *args) { int channel, volume; if (!_is_fd_valid(self->fd)) return NULL; /* Can't use _do_ioctl_1 because of encoded arg thingy. */ if (!PyArg_ParseTuple(args, "i:get", &channel)) return NULL; if (channel < 0 || channel > SOUND_MIXER_NRDEVICES) { PyErr_SetString(OSSAudioError, "Invalid mixer channel specified."); return NULL; } if (ioctl(self->fd, MIXER_READ(channel), &volume) == -1) return PyErr_SetFromErrno(PyExc_IOError); return Py_BuildValue("(ii)", volume & 0xff, (volume & 0xff00) >> 8); } static PyObject * oss_mixer_set(oss_mixer_t *self, PyObject *args) { int channel, volume, leftVol, rightVol; if (!_is_fd_valid(self->fd)) return NULL; /* Can't use _do_ioctl_1 because of encoded arg thingy. */ if (!PyArg_ParseTuple(args, "i(ii):set", &channel, &leftVol, &rightVol)) return NULL; if (channel < 0 || channel > SOUND_MIXER_NRDEVICES) { PyErr_SetString(OSSAudioError, "Invalid mixer channel specified."); return NULL; } if (leftVol < 0 || rightVol < 0 || leftVol > 100 || rightVol > 100) { PyErr_SetString(OSSAudioError, "Volumes must be between 0 and 100."); return NULL; } volume = (rightVol << 8) | leftVol; if (ioctl(self->fd, MIXER_WRITE(channel), &volume) == -1) return PyErr_SetFromErrno(PyExc_IOError); return Py_BuildValue("(ii)", volume & 0xff, (volume & 0xff00) >> 8); } static PyObject * oss_mixer_get_recsrc(oss_mixer_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_1_internal(self->fd, args, "get_recsrc", SOUND_MIXER_READ_RECSRC); } static PyObject * oss_mixer_set_recsrc(oss_mixer_t *self, PyObject *args) { if (!_is_fd_valid(self->fd)) return NULL; return _do_ioctl_1(self->fd, args, "set_recsrc", SOUND_MIXER_WRITE_RECSRC); } /* ---------------------------------------------------------------------- * Method tables and other bureaucracy */ static PyMethodDef oss_methods[] = { /* Regular file methods */ { "read", (PyCFunction)oss_read, METH_VARARGS }, { "write", (PyCFunction)oss_write, METH_VARARGS }, { "writeall", (PyCFunction)oss_writeall, METH_VARARGS }, { "close", (PyCFunction)oss_close, METH_NOARGS }, { "fileno", (PyCFunction)oss_fileno, METH_NOARGS }, /* Simple ioctl wrappers */ { "nonblock", (PyCFunction)oss_nonblock, METH_NOARGS }, { "setfmt", (PyCFunction)oss_setfmt, METH_VARARGS }, { "getfmts", (PyCFunction)oss_getfmts, METH_NOARGS }, { "channels", (PyCFunction)oss_channels, METH_VARARGS }, { "speed", (PyCFunction)oss_speed, METH_VARARGS }, { "sync", (PyCFunction)oss_sync, METH_VARARGS }, { "reset", (PyCFunction)oss_reset, METH_VARARGS }, { "post", (PyCFunction)oss_post, METH_VARARGS }, /* Convenience methods -- wrap a couple of ioctls together */ { "setparameters", (PyCFunction)oss_setparameters, METH_VARARGS }, { "bufsize", (PyCFunction)oss_bufsize, METH_NOARGS }, { "obufcount", (PyCFunction)oss_obufcount, METH_NOARGS }, { "obuffree", (PyCFunction)oss_obuffree, METH_NOARGS }, { "getptr", (PyCFunction)oss_getptr, METH_NOARGS }, /* Aliases for backwards compatibility */ { "flush", (PyCFunction)oss_sync, METH_VARARGS }, /* Support for the context manager protocol */ { "__enter__", oss_self, METH_NOARGS }, { "__exit__", oss_exit, METH_VARARGS }, { NULL, NULL} /* sentinel */ }; static PyMethodDef oss_mixer_methods[] = { /* Regular file method - OSS mixers are ioctl-only interface */ { "close", (PyCFunction)oss_mixer_close, METH_NOARGS }, { "fileno", (PyCFunction)oss_mixer_fileno, METH_NOARGS }, /* Support for the context manager protocol */ { "__enter__", oss_self, METH_NOARGS }, { "__exit__", oss_exit, METH_VARARGS }, /* Simple ioctl wrappers */ { "controls", (PyCFunction)oss_mixer_controls, METH_VARARGS }, { "stereocontrols", (PyCFunction)oss_mixer_stereocontrols, METH_VARARGS}, { "reccontrols", (PyCFunction)oss_mixer_reccontrols, METH_VARARGS}, { "get", (PyCFunction)oss_mixer_get, METH_VARARGS }, { "set", (PyCFunction)oss_mixer_set, METH_VARARGS }, { "get_recsrc", (PyCFunction)oss_mixer_get_recsrc, METH_VARARGS }, { "set_recsrc", (PyCFunction)oss_mixer_set_recsrc, METH_VARARGS }, { NULL, NULL} }; static PyObject * oss_getattro(oss_audio_t *self, PyObject *nameobj) { char *name = ""; PyObject * rval = NULL; if (PyUnicode_Check(nameobj)) name = _PyUnicode_AsString(nameobj); if (strcmp(name, "closed") == 0) { rval = (self->fd == -1) ? Py_True : Py_False; Py_INCREF(rval); } else if (strcmp(name, "name") == 0) { rval = PyUnicode_FromString(self->devicename); } else if (strcmp(name, "mode") == 0) { /* No need for a "default" in this switch: from newossobject(), self->mode can only be one of these three values. */ switch(self->mode) { case O_RDONLY: rval = PyUnicode_FromString("r"); break; case O_RDWR: rval = PyUnicode_FromString("rw"); break; case O_WRONLY: rval = PyUnicode_FromString("w"); break; } } else { rval = PyObject_GenericGetAttr((PyObject *)self, nameobj); } return rval; } static PyTypeObject OSSAudioType = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "ossaudiodev.oss_audio_device", /*tp_name*/ sizeof(oss_audio_t), /*tp_size*/ 0, /*tp_itemsize*/ /* methods */ (destructor)oss_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ 0, /*tp_reserved*/ 0, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ 0, /*tp_hash*/ 0, /*tp_call*/ 0, /*tp_str*/ (getattrofunc)oss_getattro, /*tp_getattro*/ 0, /*tp_setattro*/ 0, /*tp_as_buffer*/ Py_TPFLAGS_DEFAULT, /*tp_flags*/ 0, /*tp_doc*/ 0, /*tp_traverse*/ 0, /*tp_clear*/ 0, /*tp_richcompare*/ 0, /*tp_weaklistoffset*/ 0, /*tp_iter*/ 0, /*tp_iternext*/ oss_methods, /*tp_methods*/ }; static PyTypeObject OSSMixerType = { PyVarObject_HEAD_INIT(&PyType_Type, 0) "ossaudiodev.oss_mixer_device", /*tp_name*/ sizeof(oss_mixer_t), /*tp_size*/ 0, /*tp_itemsize*/ /* methods */ (destructor)oss_mixer_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ 0, /*tp_reserved*/ 0, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ 0, /*tp_hash*/ 0, /*tp_call*/ 0, /*tp_str*/ 0, /*tp_getattro*/ 0, /*tp_setattro*/ 0, /*tp_as_buffer*/ Py_TPFLAGS_DEFAULT, /*tp_flags*/ 0, /*tp_doc*/ 0, /*tp_traverse*/ 0, /*tp_clear*/ 0, /*tp_richcompare*/ 0, /*tp_weaklistoffset*/ 0, /*tp_iter*/ 0, /*tp_iternext*/ oss_mixer_methods, /*tp_methods*/ }; static PyObject * ossopen(PyObject *self, PyObject *args) { return (PyObject *)newossobject(args); } static PyObject * ossopenmixer(PyObject *self, PyObject *args) { return (PyObject *)newossmixerobject(args); } static PyMethodDef ossaudiodev_methods[] = { { "open", ossopen, METH_VARARGS }, { "openmixer", ossopenmixer, METH_VARARGS }, { 0, 0 }, }; #define _EXPORT_INT(mod, name) \ if (PyModule_AddIntConstant(mod, #name, (long) (name)) == -1) return NULL; static char *control_labels[] = SOUND_DEVICE_LABELS; static char *control_names[] = SOUND_DEVICE_NAMES; static int build_namelists (PyObject *module) { PyObject *labels; PyObject *names; PyObject *s; int num_controls; int i; num_controls = Py_ARRAY_LENGTH(control_labels); assert(num_controls == Py_ARRAY_LENGTH(control_names)); labels = PyList_New(num_controls); names = PyList_New(num_controls); if (labels == NULL || names == NULL) goto error2; for (i = 0; i < num_controls; i++) { s = PyUnicode_FromString(control_labels[i]); if (s == NULL) goto error2; PyList_SET_ITEM(labels, i, s); s = PyUnicode_FromString(control_names[i]); if (s == NULL) goto error2; PyList_SET_ITEM(names, i, s); } if (PyModule_AddObject(module, "control_labels", labels) == -1) goto error2; if (PyModule_AddObject(module, "control_names", names) == -1) goto error1; return 0; error2: Py_XDECREF(labels); error1: Py_XDECREF(names); return -1; } static struct PyModuleDef ossaudiodevmodule = { PyModuleDef_HEAD_INIT, "ossaudiodev", NULL, -1, ossaudiodev_methods, NULL, NULL, NULL, NULL }; PyMODINIT_FUNC PyInit_ossaudiodev(void) { PyObject *m; if (PyType_Ready(&OSSAudioType) < 0) return NULL; if (PyType_Ready(&OSSMixerType) < 0) return NULL; m = PyModule_Create(&ossaudiodevmodule); if (m == NULL) return NULL; OSSAudioError = PyErr_NewException("ossaudiodev.OSSAudioError", NULL, NULL); if (OSSAudioError) { /* Each call to PyModule_AddObject decrefs it; compensate: */ Py_INCREF(OSSAudioError); Py_INCREF(OSSAudioError); PyModule_AddObject(m, "error", OSSAudioError); PyModule_AddObject(m, "OSSAudioError", OSSAudioError); } /* Build 'control_labels' and 'control_names' lists and add them to the module. */ if (build_namelists(m) == -1) /* XXX what to do here? */ return NULL; /* Expose the audio format numbers -- essential! */ _EXPORT_INT(m, AFMT_QUERY); _EXPORT_INT(m, AFMT_MU_LAW); _EXPORT_INT(m, AFMT_A_LAW); _EXPORT_INT(m, AFMT_IMA_ADPCM); _EXPORT_INT(m, AFMT_U8); _EXPORT_INT(m, AFMT_S16_LE); _EXPORT_INT(m, AFMT_S16_BE); _EXPORT_INT(m, AFMT_S8); _EXPORT_INT(m, AFMT_U16_LE); _EXPORT_INT(m, AFMT_U16_BE); _EXPORT_INT(m, AFMT_MPEG); #ifdef AFMT_AC3 _EXPORT_INT(m, AFMT_AC3); #endif #ifdef AFMT_S16_NE _EXPORT_INT(m, AFMT_S16_NE); #endif #ifdef AFMT_U16_NE _EXPORT_INT(m, AFMT_U16_NE); #endif #ifdef AFMT_S32_LE _EXPORT_INT(m, AFMT_S32_LE); #endif #ifdef AFMT_S32_BE _EXPORT_INT(m, AFMT_S32_BE); #endif #ifdef AFMT_MPEG _EXPORT_INT(m, AFMT_MPEG); #endif /* Expose the sound mixer device numbers. */ _EXPORT_INT(m, SOUND_MIXER_NRDEVICES); _EXPORT_INT(m, SOUND_MIXER_VOLUME); _EXPORT_INT(m, SOUND_MIXER_BASS); _EXPORT_INT(m, SOUND_MIXER_TREBLE); _EXPORT_INT(m, SOUND_MIXER_SYNTH); _EXPORT_INT(m, SOUND_MIXER_PCM); _EXPORT_INT(m, SOUND_MIXER_SPEAKER); _EXPORT_INT(m, SOUND_MIXER_LINE); _EXPORT_INT(m, SOUND_MIXER_MIC); _EXPORT_INT(m, SOUND_MIXER_CD); _EXPORT_INT(m, SOUND_MIXER_IMIX); _EXPORT_INT(m, SOUND_MIXER_ALTPCM); _EXPORT_INT(m, SOUND_MIXER_RECLEV); _EXPORT_INT(m, SOUND_MIXER_IGAIN); _EXPORT_INT(m, SOUND_MIXER_OGAIN); _EXPORT_INT(m, SOUND_MIXER_LINE1); _EXPORT_INT(m, SOUND_MIXER_LINE2); _EXPORT_INT(m, SOUND_MIXER_LINE3); #ifdef SOUND_MIXER_DIGITAL1 _EXPORT_INT(m, SOUND_MIXER_DIGITAL1); #endif #ifdef SOUND_MIXER_DIGITAL2 _EXPORT_INT(m, SOUND_MIXER_DIGITAL2); #endif #ifdef SOUND_MIXER_DIGITAL3 _EXPORT_INT(m, SOUND_MIXER_DIGITAL3); #endif #ifdef SOUND_MIXER_PHONEIN _EXPORT_INT(m, SOUND_MIXER_PHONEIN); #endif #ifdef SOUND_MIXER_PHONEOUT _EXPORT_INT(m, SOUND_MIXER_PHONEOUT); #endif #ifdef SOUND_MIXER_VIDEO _EXPORT_INT(m, SOUND_MIXER_VIDEO); #endif #ifdef SOUND_MIXER_RADIO _EXPORT_INT(m, SOUND_MIXER_RADIO); #endif #ifdef SOUND_MIXER_MONITOR _EXPORT_INT(m, SOUND_MIXER_MONITOR); #endif /* Expose all the ioctl numbers for masochists who like to do this stuff directly. */ _EXPORT_INT(m, SNDCTL_COPR_HALT); _EXPORT_INT(m, SNDCTL_COPR_LOAD); _EXPORT_INT(m, SNDCTL_COPR_RCODE); _EXPORT_INT(m, SNDCTL_COPR_RCVMSG); _EXPORT_INT(m, SNDCTL_COPR_RDATA); _EXPORT_INT(m, SNDCTL_COPR_RESET); _EXPORT_INT(m, SNDCTL_COPR_RUN); _EXPORT_INT(m, SNDCTL_COPR_SENDMSG); _EXPORT_INT(m, SNDCTL_COPR_WCODE); _EXPORT_INT(m, SNDCTL_COPR_WDATA); #ifdef SNDCTL_DSP_BIND_CHANNEL _EXPORT_INT(m, SNDCTL_DSP_BIND_CHANNEL); #endif _EXPORT_INT(m, SNDCTL_DSP_CHANNELS); _EXPORT_INT(m, SNDCTL_DSP_GETBLKSIZE); _EXPORT_INT(m, SNDCTL_DSP_GETCAPS); #ifdef SNDCTL_DSP_GETCHANNELMASK _EXPORT_INT(m, SNDCTL_DSP_GETCHANNELMASK); #endif _EXPORT_INT(m, SNDCTL_DSP_GETFMTS); _EXPORT_INT(m, SNDCTL_DSP_GETIPTR); _EXPORT_INT(m, SNDCTL_DSP_GETISPACE); #ifdef SNDCTL_DSP_GETODELAY _EXPORT_INT(m, SNDCTL_DSP_GETODELAY); #endif _EXPORT_INT(m, SNDCTL_DSP_GETOPTR); _EXPORT_INT(m, SNDCTL_DSP_GETOSPACE); #ifdef SNDCTL_DSP_GETSPDIF _EXPORT_INT(m, SNDCTL_DSP_GETSPDIF); #endif _EXPORT_INT(m, SNDCTL_DSP_GETTRIGGER); _EXPORT_INT(m, SNDCTL_DSP_MAPINBUF); _EXPORT_INT(m, SNDCTL_DSP_MAPOUTBUF); _EXPORT_INT(m, SNDCTL_DSP_NONBLOCK); _EXPORT_INT(m, SNDCTL_DSP_POST); #ifdef SNDCTL_DSP_PROFILE _EXPORT_INT(m, SNDCTL_DSP_PROFILE); #endif _EXPORT_INT(m, SNDCTL_DSP_RESET); _EXPORT_INT(m, SNDCTL_DSP_SAMPLESIZE); _EXPORT_INT(m, SNDCTL_DSP_SETDUPLEX); _EXPORT_INT(m, SNDCTL_DSP_SETFMT); _EXPORT_INT(m, SNDCTL_DSP_SETFRAGMENT); #ifdef SNDCTL_DSP_SETSPDIF _EXPORT_INT(m, SNDCTL_DSP_SETSPDIF); #endif _EXPORT_INT(m, SNDCTL_DSP_SETSYNCRO); _EXPORT_INT(m, SNDCTL_DSP_SETTRIGGER); _EXPORT_INT(m, SNDCTL_DSP_SPEED); _EXPORT_INT(m, SNDCTL_DSP_STEREO); _EXPORT_INT(m, SNDCTL_DSP_SUBDIVIDE); _EXPORT_INT(m, SNDCTL_DSP_SYNC); _EXPORT_INT(m, SNDCTL_FM_4OP_ENABLE); _EXPORT_INT(m, SNDCTL_FM_LOAD_INSTR); _EXPORT_INT(m, SNDCTL_MIDI_INFO); _EXPORT_INT(m, SNDCTL_MIDI_MPUCMD); _EXPORT_INT(m, SNDCTL_MIDI_MPUMODE); _EXPORT_INT(m, SNDCTL_MIDI_PRETIME); _EXPORT_INT(m, SNDCTL_SEQ_CTRLRATE); _EXPORT_INT(m, SNDCTL_SEQ_GETINCOUNT); _EXPORT_INT(m, SNDCTL_SEQ_GETOUTCOUNT); #ifdef SNDCTL_SEQ_GETTIME _EXPORT_INT(m, SNDCTL_SEQ_GETTIME); #endif _EXPORT_INT(m, SNDCTL_SEQ_NRMIDIS); _EXPORT_INT(m, SNDCTL_SEQ_NRSYNTHS); _EXPORT_INT(m, SNDCTL_SEQ_OUTOFBAND); _EXPORT_INT(m, SNDCTL_SEQ_PANIC); _EXPORT_INT(m, SNDCTL_SEQ_PERCMODE); _EXPORT_INT(m, SNDCTL_SEQ_RESET); _EXPORT_INT(m, SNDCTL_SEQ_RESETSAMPLES); _EXPORT_INT(m, SNDCTL_SEQ_SYNC); _EXPORT_INT(m, SNDCTL_SEQ_TESTMIDI); _EXPORT_INT(m, SNDCTL_SEQ_THRESHOLD); #ifdef SNDCTL_SYNTH_CONTROL _EXPORT_INT(m, SNDCTL_SYNTH_CONTROL); #endif #ifdef SNDCTL_SYNTH_ID _EXPORT_INT(m, SNDCTL_SYNTH_ID); #endif _EXPORT_INT(m, SNDCTL_SYNTH_INFO); _EXPORT_INT(m, SNDCTL_SYNTH_MEMAVL); #ifdef SNDCTL_SYNTH_REMOVESAMPLE _EXPORT_INT(m, SNDCTL_SYNTH_REMOVESAMPLE); #endif _EXPORT_INT(m, SNDCTL_TMR_CONTINUE); _EXPORT_INT(m, SNDCTL_TMR_METRONOME); _EXPORT_INT(m, SNDCTL_TMR_SELECT); _EXPORT_INT(m, SNDCTL_TMR_SOURCE); _EXPORT_INT(m, SNDCTL_TMR_START); _EXPORT_INT(m, SNDCTL_TMR_STOP); _EXPORT_INT(m, SNDCTL_TMR_TEMPO); _EXPORT_INT(m, SNDCTL_TMR_TIMEBASE); return m; }