1 /*-
2  * Copyright (c) 2015-2019 Hans Petter Selasky
53 	value[4] = *format & VPREFERRED_ULE_AFMT;  in oss_set_format()
67 	return (-1);  in oss_set_format()
73 	if (pbe->fd > -1) {  in oss_close()
74 		close(pbe->fd);  in oss_close()
75 		pbe->fd = -1;  in oss_close()
83 	int temp;  in oss_open()  local
86 	pbe->fd = open(devname, attr);  in oss_open()
87 	if (pbe->fd < 0) {  in oss_open()
89 		return (-1);  in oss_open()
91 	err = ioctl(pbe->fd, FIONBIO, &fionbio);  in oss_open()
96 	err = oss_set_format(pbe->fd, pformat);  in oss_open()
101 	temp = *pchannels;  in oss_open()
102 	bufsize /= temp;	/* get buffer size per channel */  in oss_open()
104 		err = ioctl(pbe->fd, SOUND_PCM_WRITE_CHANNELS, &temp);  in oss_open()
105 	} while (err < 0 && --temp > 0);  in oss_open()
107 	err = ioctl(pbe->fd, SOUND_PCM_READ_CHANNELS, &temp);  in oss_open()
108 	if (err < 0 || temp <= 0 || temp > *pchannels) {  in oss_open()
109 		warn("Could not set DSP channels: %d / %d", temp, *pchannels);  in oss_open()
112 	*pchannels = temp;  in oss_open()
114 	temp = samplerate;  in oss_open()
115 	err = ioctl(pbe->fd, SNDCTL_DSP_SPEED, &temp);  in oss_open()
116 	if (err < 0 || temp != samplerate) {  in oss_open()
117 		warn("Could not set sample rate to %d / %d Hz", temp, samplerate);  in oss_open()
121 	temp = bufsize * (*pchannels);  in oss_open()
122 	err = ioctl(pbe->fd, SNDCTL_DSP_SETBLKSIZE, &temp);  in oss_open()
124 		warn("Could not set block size to %d", temp);  in oss_open()
129 	close(pbe->fd);  in oss_open()
130 	pbe->fd = -1;  in oss_open()
131 	return (-1);  in oss_open()
145 	bufsize *= 4;	/* XXX allow extra space for jitter */  in oss_play_open()
152 	struct pollfd fds = { .fd = pbe->fd, .events = POLLIN | POLLRDNORM };  in oss_rec_transfer()
158 		return (-1);  in oss_rec_transfer()
159 	return (read(pbe->fd, ptr, len));  in oss_rec_transfer()
165 	return (write(pbe->fd, ptr, len));  in oss_play_transfer()
171 	if (ioctl(pbe->fd, FIONREAD, pdelay) != 0)  in oss_rec_delay()
172 		*pdelay = -1;  in oss_rec_delay()
179 	    ioctl(pbe->fd, SNDCTL_DSP_GETODELAY, pdelay) != 0)  in oss_play_delay()
180 		*pdelay = -1;  in oss_play_delay()
188 	.fd = -1,
196 	.fd = -1,