1 /* Hey Emacs, this is -*-C-*-
3  * linuxaudiodev.c -- Linux audio device for python.
62     {  8,       AFMT_MU_LAW, "logarithmic mu-law 8-bit audio" },
63     {  8,       AFMT_A_LAW,  "logarithmic A-law 8-bit audio" },
64     {  8,       AFMT_U8,     "linear unsigned 8-bit audio" },
65     {  8,       AFMT_S8,     "linear signed 8-bit audio" },
66     { 16,       AFMT_U16_BE, "linear unsigned 16-bit big-endian audio" },
67     { 16,       AFMT_U16_LE, "linear unsigned 16-bit little-endian audio" },
68     { 16,       AFMT_S16_BE, "linear signed 16-bit big-endian audio" },
69     { 16,       AFMT_S16_LE, "linear signed 16-bit little-endian audio" },
70     { 16,       AFMT_S16_NE, "linear signed 16-bit native-endian audio" },
82     lad_t *xp;  in newladobject()  local
99     if (strcmp(mode, "r") == 0)  in newladobject()
104         PyErr_SetString(LinuxAudioError, "mode should be 'r' or 'w'");  in newladobject()
113      * is that the former uses logarithmic mu-law encoding and the  in newladobject()
114      * latter uses 8-bit unsigned encoding.  in newladobject()
123     if ((fd = open(basedev, imode)) == -1) {  in newladobject()
127     if (imode == O_WRONLY && ioctl(fd, SNDCTL_DSP_NONBLOCK, NULL) == -1) {  in newladobject()
131     if (ioctl(fd, SNDCTL_DSP_GETFMTS, &afmts) == -1) {  in newladobject()
136     if ((xp = PyObject_New(lad_t, &Ladtype)) == NULL) {  in newladobject()
140     xp->x_fd = fd;  in newladobject()
141     xp->x_mode = imode;  in newladobject()
142     xp->x_icount = xp->x_ocount = 0;  in newladobject()
143     xp->x_afmts  = afmts;  in newladobject()
144     return xp;  in newladobject()
148 lad_dealloc(lad_t *xp)  in lad_dealloc()  argument
151     if (xp->x_fd != -1)  in lad_dealloc()
152         close(xp->x_fd);  in lad_dealloc()
153     PyObject_Del(xp);  in lad_dealloc()
169     if ((count = read(self->x_fd, cp, size)) < 0) {  in lad_read()
174     self->x_icount += count;  in lad_read()
193     FD_SET(self->x_fd, &write_set_fds);  in lad_write()
198       select_retval = select(self->x_fd+1, NULL, &write_set_fds, NULL, &tv);  in lad_write()
201         if ((rv = write(self->x_fd, cp, size)) == -1) {  in lad_write()
209           self->x_ocount += rv;  in lad_write()
210           size -= rv;  in lad_write()
226     if (self->x_fd >= 0) {  in lad_close()
227         close(self->x_fd);  in lad_close()
228         self->x_fd = -1;  in lad_close()
236     return PyInt_FromLong(self->x_fd);  in lad_fileno()
279         if ((self->x_afmts & audio_types[n].a_fmt) == 0) {  in lad_setparameters()
286     if (ioctl(self->x_fd, SNDCTL_DSP_SETFMT,  in lad_setparameters()
287               &audio_types[n].a_fmt) == -1) {  in lad_setparameters()
291     if (ioctl(self->x_fd, SNDCTL_DSP_CHANNELS, &nchannels) == -1) {  in lad_setparameters()
295     if (ioctl(self->x_fd, SNDCTL_DSP_SPEED, &rate) == -1) {  in lad_setparameters()
310     if (ioctl(self->x_fd, SNDCTL_DSP_SETFMT, &fmt) < 0)  in _ssize()
311         return -errno;  in _ssize()
329         return -EOPNOTSUPP;  in _ssize()
331     if (ioctl(self->x_fd, SNDCTL_DSP_CHANNELS, nchannels) < 0)  in _ssize()
332         return -errno;  in _ssize()
349     if (ioctl(self->x_fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {  in lad_bufsize()
368     if (ioctl(self->x_fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {  in lad_obufcount()
372     return PyInt_FromLong((ai.fragstotal * ai.fragsize - ai.bytes) /  in lad_obufcount()
388     if (ioctl(self->x_fd, SNDCTL_DSP_GETOSPACE, &ai) < 0) {  in lad_obuffree()
399     if (ioctl(self->x_fd, SNDCTL_DSP_SYNC, NULL) == -1) {  in lad_flush()
412     if (self->x_mode == O_RDONLY)  in lad_getptr()
416     if (ioctl(self->x_fd, req, &info) == -1) {  in lad_getptr()
438 lad_getattr(lad_t *xp, char *name)  in lad_getattr()  argument
440     return Py_FindMethod(lad_methods, (PyObject *)xp, name);  in lad_getattr()
485     if (PyModule_AddIntConstant(m, "AFMT_MU_LAW", (long)AFMT_MU_LAW) == -1)  in initlinuxaudiodev()
487     if (PyModule_AddIntConstant(m, "AFMT_A_LAW", (long)AFMT_A_LAW) == -1)  in initlinuxaudiodev()
489     if (PyModule_AddIntConstant(m, "AFMT_U8", (long)AFMT_U8) == -1)  in initlinuxaudiodev()
491     if (PyModule_AddIntConstant(m, "AFMT_S8", (long)AFMT_S8) == -1)  in initlinuxaudiodev()
493     if (PyModule_AddIntConstant(m, "AFMT_U16_BE", (long)AFMT_U16_BE) == -1)  in initlinuxaudiodev()
495     if (PyModule_AddIntConstant(m, "AFMT_U16_LE", (long)AFMT_U16_LE) == -1)  in initlinuxaudiodev()
497     if (PyModule_AddIntConstant(m, "AFMT_S16_BE", (long)AFMT_S16_BE) == -1)  in initlinuxaudiodev()
499     if (PyModule_AddIntConstant(m, "AFMT_S16_LE", (long)AFMT_S16_LE) == -1)  in initlinuxaudiodev()
501     if (PyModule_AddIntConstant(m, "AFMT_S16_NE", (long)AFMT_S16_NE) == -1)  in initlinuxaudiodev()