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);
}
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_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_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_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_mixer_fileno(oss_mixer_t *self, PyObject *unused)
{
if (!_is_fd_valid(self->fd))
return NULL;
return PyLong_FromLong(self->fd);
}
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 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);
}
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_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_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_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_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_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_OSError);
Py_RETURN_NONE;
}
/* 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_OSError);
return NULL;
}
if (ioctl(self->fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
return PyLong_FromLong((ai.fragstotal * ai.fragsize) / (nchannels * ssize));
}
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);
}
/* 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_write(oss_audio_t *self, PyObject *args)
{
Py_buffer data;
Py_ssize_t rv;
if (!_is_fd_valid(self->fd))
return NULL;
if (!PyArg_ParseTuple(args, "y*:write", &data)) {
return NULL;
}
rv = _Py_write(self->fd, data.buf, data.len);
PyBuffer_Release(&data);
if (rv == -1)
return NULL;
self->ocount += rv;
return PyLong_FromLong(rv);
}
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_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)
{
Py_buffer data;
const char *cp;
Py_ssize_t size;
Py_ssize_t rv;
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*:writeall", &data))
return NULL;
if (!_PyIsSelectable_fd(self->fd)) {
PyErr_SetString(PyExc_ValueError,
"file descriptor out of range for select");
PyBuffer_Release(&data);
return NULL;
}
/* use select to wait for audio device to be available */
FD_ZERO(&write_set_fds);
FD_SET(self->fd, &write_set_fds);
cp = (const char *)data.buf;
size = data.len;
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) {
PyBuffer_Release(&data);
return PyErr_SetFromErrno(PyExc_OSError);
}
rv = _Py_write(self->fd, cp, Py_MIN(size, INT_MAX));
if (rv == -1) {
/* buffer is full, try again */
if (errno == EAGAIN) {
PyErr_Clear();
continue;
}
/* it's a real error */
PyBuffer_Release(&data);
return NULL;
}
/* wrote rv bytes */
self->ocount += rv;
size -= rv;
cp += rv;
}
PyBuffer_Release(&data);
Py_RETURN_NONE;
}
