2  * audio.c - audio interface for reference clock audio drivers
51  * 4.4BSD-Lite switched to an unsigned long ioctl arg.  Detect common
102 	    ? -1  in mixer_name()
124  * util/audio-pcm program.
139 	if ((fd = fopen(device, "r")) == NULL) {  in audio_config_read()
143 		if ((fd = fopen(device, "r")) == NULL) {  in audio_config_read()
147 			if ((fd = fopen(device, "r")) == NULL) {  in audio_config_read()
165 		     i > 0 && isascii((unsigned char)line[i - 1]) && isspace((unsigned char)line[i - 1]);  in audio_config_read()
167 			line[--i] = '\0';  in audio_config_read()
206 			printf("monitor <%s> %d\n", ab, mixer_name(ab, -1));  in audio_config_read()
215  * audio_init - open and initialize audio device
222  * (1) and encoding (ITU-T G.711 mu-law companded) have been set by
229 	int	unit		/* device unit (0-3) */  in audio_init()
291 	if (ioctl(fd, AIOGSIZE, &s_size) == -1)  in audio_init()
301 	if (ioctl(fd, AIOSSIZE, &s_size) == -1)  in audio_init()
311 		if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &tmp) == -1)  in audio_init()
318 	if (ioctl(fd, AIOGFMT, &s_c_p) == -1)  in audio_init()
327 	if (ioctl(ctl_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1)  in audio_init()
329 	if (ioctl(ctl_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1)  in audio_init()
378  * audio_gain - adjust codec gains and port
382 	int gain,		/* volume level (gain) 0-255 */  in audio_gain()
383 	int mongain,		/* input to output mix (monitor gain) 0-255 */  in audio_gain()
388 	static int o_mongain = -1;  in audio_gain()
389 	static int o_port = -1;  in audio_gain()
392 	int l, r;  in audio_gain()  local
398 	r = l = 100 * gain / 255;	/* Normalize to 0-100 */  in audio_gain()
405 	r = 0 ; /* setting to zero nicely mutes the channel */  in audio_gain()
407 	l |= r << 8;  in audio_gain()
416 	if (-1 == rval) {  in audio_gain()
422 		r = l = 100 * mongain / 255;    /* Normalize to 0-100 */  in audio_gain()
427 		l |= r << 8;  in audio_gain()
433 		if (-1 == rval) {  in audio_gain()
448 		if (rval == -1) {  in audio_gain()
455 			if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &l) == -1)  in audio_gain()
485  * audio_show - display audio parameters
497 	if (ioctl(ctl_fd, SOUND_MIXER_READ_RECSRC, &recsrc) == -1)  in audio_show()