C++ (Cpp) snd_hwdep_read Beispiele

Beispiel #1

Datei: alsa_usb.c Projekt: andyvand/LIRC

static char* rec(struct ir_remote* remotes)
{
	unsigned char rc_code;
	ssize_t size;
	struct timeval current;

	size = snd_hwdep_read(hwdep, &rc_code, 1);
	if (size < 1)
		return NULL;
	gettimeofday(&current, NULL);
	last_code = code;
	code = (ir_code)rc_code;
	/* delay for repeating buttons is up to 320 ms */
	repeat_flag = code == last_code && current.tv_sec - last_time.tv_sec <= 2
		      && time_elapsed(&last_time, &current) <= 350000;
	last_time = current;
	LOGPRINTF(1, "code: %llx", (__u64)code);
	LOGPRINTF(1, "repeat_flag: %d", repeat_flag);
	return decode_all(remotes);
}

Beispiel #2

static int headset_volume_fromcard(struct s_headset *headset)
{
	int len;
	char line[100];

	len = snd_hwdep_read(headset->handle, headset->volumes, sizeof(headset->volumes));
	if (len != sizeof(headset->volumes)) 
		return 0;
	fprintf(stderr, "volume speaker: %d mic: %d\n", headset->volumes[0], headset->volumes[1]);
	if (headset->volumes[0] != headset->last_volumes[0]) {
		sprintf(line, "\r\n+VGS=%d\r\n", headset->volumes[0]);
		write(headset->rfcomm_fd, line, strlen(line));
		headset->last_volumes[0] = headset->last_volumes[0];
	}
	if (headset->volumes[1] != headset->last_volumes[1]) {
		sprintf(line, "\r\n+VGM=%d\r\n", headset->volumes[1]);
		write(headset->rfcomm_fd, line, strlen(line));
		headset->last_volumes[1] = headset->last_volumes[1];
	}
	return 1;
}