amixer.c

alsa-utils-1.0.14编译声卡驱动所需要的一些文件源码

			while (size > 0) {
				printf("0x%x", tlv[idx++]);
				size -= sizeof(unsigned int);
			}
		} else {
			printf("min=");
			print_dB(tlv[2]);
			printf(",step=");
			print_dB(tlv[3] & 0xffff);
			printf(",mute=%i", (tlv[3] >> 16) & 1);
		}
		break;
#ifdef SND_CTL_TLVT_DB_LINEAR
	case SND_CTL_TLVT_DB_LINEAR:
		printf("dBlinear-");
		if (size != 2 * sizeof(unsigned int)) {
			while (size > 0) {
				printf("0x%x", tlv[idx++]);
				size -= sizeof(unsigned int);
			}
		} else {
			printf("min=");
			print_dB(tlv[2]);
			printf(",max=");
			print_dB(tlv[3]);
		}
		break;
#endif
	default:
		printf("unk-%i-", type);
		while (size > 0) {
			printf("0x%x", tlv[idx++]);
			size -= sizeof(unsigned int);
		}
		break;
	}
	putc('\n', stdout);
}

static int show_control(const char *space, snd_hctl_elem_t *elem,
			int level)
{
	int err;
	unsigned int item, idx, count, *tlv;
	snd_ctl_elem_type_t type;
	snd_ctl_elem_id_t *id;
	snd_ctl_elem_info_t *info;
	snd_ctl_elem_value_t *control;
	snd_aes_iec958_t iec958;
	snd_ctl_elem_id_alloca(&id);
	snd_ctl_elem_info_alloca(&info);
	snd_ctl_elem_value_alloca(&control);
	if ((err = snd_hctl_elem_info(elem, info)) < 0) {
		error("Control %s snd_hctl_elem_info error: %s\n", card, snd_strerror(err));
		return err;
	}
	if (level & LEVEL_ID) {
		snd_hctl_elem_get_id(elem, id);
		show_control_id(id);
		printf("\n");
	}
	count = snd_ctl_elem_info_get_count(info);
	type = snd_ctl_elem_info_get_type(info);
	printf("%s; type=%s,access=%s,values=%i", space, control_type(info), control_access(info), count);
	switch (type) {
	case SND_CTL_ELEM_TYPE_INTEGER:
		printf(",min=%li,max=%li,step=%li\n", 
		       snd_ctl_elem_info_get_min(info),
		       snd_ctl_elem_info_get_max(info),
		       snd_ctl_elem_info_get_step(info));
		break;
	case SND_CTL_ELEM_TYPE_INTEGER64:
		printf(",min=%Li,max=%Li,step=%Li\n", 
		       snd_ctl_elem_info_get_min64(info),
		       snd_ctl_elem_info_get_max64(info),
		       snd_ctl_elem_info_get_step64(info));
		break;
	case SND_CTL_ELEM_TYPE_ENUMERATED:
	{
		unsigned int items = snd_ctl_elem_info_get_items(info);
		printf(",items=%u\n", items);
		for (item = 0; item < items; item++) {
			snd_ctl_elem_info_set_item(info, item);
			if ((err = snd_hctl_elem_info(elem, info)) < 0) {
				error("Control %s element info error: %s\n", card, snd_strerror(err));
				return err;
			}
			printf("%s; Item #%u '%s'\n", space, item, snd_ctl_elem_info_get_item_name(info));
		}
		break;
	}
	default:
		printf("\n");
		break;
	}
	if (level & LEVEL_BASIC) {
		if ((err = snd_hctl_elem_read(elem, control)) < 0) {
			error("Control %s element read error: %s\n", card, snd_strerror(err));
			return err;
		}
		printf("%s: values=", space);
		for (idx = 0; idx < count; idx++) {
			if (idx > 0)
				printf(",");
			switch (type) {
			case SND_CTL_ELEM_TYPE_BOOLEAN:
				printf("%s", snd_ctl_elem_value_get_boolean(control, idx) ? "on" : "off");
				break;
			case SND_CTL_ELEM_TYPE_INTEGER:
				printf("%li", snd_ctl_elem_value_get_integer(control, idx));
				break;
			case SND_CTL_ELEM_TYPE_INTEGER64:
				printf("%Li", snd_ctl_elem_value_get_integer64(control, idx));
				break;
			case SND_CTL_ELEM_TYPE_ENUMERATED:
				printf("%u", snd_ctl_elem_value_get_enumerated(control, idx));
				break;
			case SND_CTL_ELEM_TYPE_BYTES:
				printf("0x%02x", snd_ctl_elem_value_get_byte(control, idx));
				break;
			case SND_CTL_ELEM_TYPE_IEC958:
				snd_ctl_elem_value_get_iec958(control, &iec958);
				printf("[AES0=0x%02x AES1=0x%02x AES2=0x%02x AES3=0x%02x]",
				       iec958.status[0], iec958.status[1],
				       iec958.status[2], iec958.status[3]);
				break;
			default:
				printf("?");
				break;
			}
		}
		printf("\n");
		if (!snd_ctl_elem_info_is_tlv_readable(info))
			goto __skip_tlv;
		tlv = malloc(4096);
		if ((err = snd_hctl_elem_tlv_read(elem, tlv, 4096)) < 0) {
			error("Control %s element TLV read error: %s\n", card, snd_strerror(err));
			free(tlv);
			return err;
		}
		decode_tlv(strlen(space), tlv, 4096);
		free(tlv);
	}
      __skip_tlv:
	return 0;
}

static int controls(int level)
{
	int err;
	snd_hctl_t *handle;
	snd_hctl_elem_t *elem;
	snd_ctl_elem_id_t *id;
	snd_ctl_elem_info_t *info;
	snd_ctl_elem_id_alloca(&id);
	snd_ctl_elem_info_alloca(&info);
	
	if ((err = snd_hctl_open(&handle, card, 0)) < 0) {
		error("Control %s open error: %s", card, snd_strerror(err));
		return err;
	}
	if ((err = snd_hctl_load(handle)) < 0) {
		error("Control %s local error: %s\n", card, snd_strerror(err));
		return err;
	}
	for (elem = snd_hctl_first_elem(handle); elem; elem = snd_hctl_elem_next(elem)) {
		if ((err = snd_hctl_elem_info(elem, info)) < 0) {
			error("Control %s snd_hctl_elem_info error: %s\n", card, snd_strerror(err));
			return err;
		}
		if (!(level & LEVEL_INACTIVE) && snd_ctl_elem_info_is_inactive(info))
			continue;
		snd_hctl_elem_get_id(elem, id);
		show_control_id(id);
		printf("\n");
		if (level & LEVEL_BASIC)
			show_control("  ", elem, 1);
	}
	snd_hctl_close(handle);
	return 0;
}

static int show_selem(snd_mixer_t *handle, snd_mixer_selem_id_t *id, const char *space, int level)
{
	snd_mixer_selem_channel_id_t chn;
	long pmin = 0, pmax = 0;
	long cmin = 0, cmax = 0;
	long pvol, cvol;
	int psw, csw;
	int pmono, cmono, mono_ok = 0;
	long db;
	snd_mixer_elem_t *elem;
	
	elem = snd_mixer_find_selem(handle, id);
	if (!elem) {
		error("Mixer %s simple element not found", card);
		return -ENOENT;
	}

	if (level & LEVEL_BASIC) {
		printf("%sCapabilities:", space);
		if (snd_mixer_selem_has_common_volume(elem)) {
			printf(" volume");
			if (snd_mixer_selem_has_playback_volume_joined(elem))
				printf(" volume-joined");
		} else {
			if (snd_mixer_selem_has_playback_volume(elem)) {
				printf(" pvolume");
				if (snd_mixer_selem_has_playback_volume_joined(elem))
					printf(" pvolume-joined");
			}
			if (snd_mixer_selem_has_capture_volume(elem)) {
				printf(" cvolume");
				if (snd_mixer_selem_has_capture_volume_joined(elem))
					printf(" cvolume-joined");
			}
		}
		if (snd_mixer_selem_has_common_switch(elem)) {
			printf(" switch");
			if (snd_mixer_selem_has_playback_switch_joined(elem))
				printf(" switch-joined");
		} else {
			if (snd_mixer_selem_has_playback_switch(elem)) {
				printf(" pswitch");
				if (snd_mixer_selem_has_playback_switch_joined(elem))
					printf(" pswitch-joined");
			}
			if (snd_mixer_selem_has_capture_switch(elem)) {
				printf(" cswitch");
				if (snd_mixer_selem_has_capture_switch_joined(elem))
					printf(" cswitch-joined");
				if (snd_mixer_selem_has_capture_switch_exclusive(elem))
					printf(" cswitch-exclusive");
			}
		}
		if (snd_mixer_selem_is_enum_playback(elem)) {
			printf(" penum");
		} else if (snd_mixer_selem_is_enum_capture(elem)) {
			printf(" cenum");
		} else if (snd_mixer_selem_is_enumerated(elem)) {
			printf(" enum");
		}
		printf("\n");
		if (snd_mixer_selem_is_enumerated(elem)) {
			int i, items;
			unsigned int idx;
			char itemname[40];
			items = snd_mixer_selem_get_enum_items(elem);
			printf("  Items:");
			for (i = 0; i < items; i++) {
				snd_mixer_selem_get_enum_item_name(elem, i, sizeof(itemname) - 1, itemname);
				printf(" '%s'", itemname);
			}
			printf("\n");
			for (i = 0; !snd_mixer_selem_get_enum_item(elem, i, &idx); i++) {
				snd_mixer_selem_get_enum_item_name(elem, idx, sizeof(itemname) - 1, itemname);
				printf("  Item%d: '%s'\n", i, itemname);
			}
			return 0; /* no more thing to do */
		}
		if (snd_mixer_selem_has_capture_switch_exclusive(elem))
			printf("%sCapture exclusive group: %i\n", space,
			       snd_mixer_selem_get_capture_group(elem));
		if (snd_mixer_selem_has_playback_volume(elem) ||
		    snd_mixer_selem_has_playback_switch(elem)) {
			printf("%sPlayback channels:", space);
			if (snd_mixer_selem_is_playback_mono(elem)) {
				printf(" Mono");
			} else {
				int first = 1;
				for (chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++){
					if (!snd_mixer_selem_has_playback_channel(elem, chn))
						continue;
					if (!first)
						printf(" -");
					printf(" %s", snd_mixer_selem_channel_name(chn));
					first = 0;
				}
			}
			printf("\n");
		}
		if (snd_mixer_selem_has_capture_volume(elem) ||
		    snd_mixer_selem_has_capture_switch(elem)) {
			printf("%sCapture channels:", space);
			if (snd_mixer_selem_is_capture_mono(elem)) {
				printf(" Mono");
			} else {
				int first = 1;
				for (chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++){
					if (!snd_mixer_selem_has_capture_channel(elem, chn))
						continue;
					if (!first)
						printf(" -");
					printf(" %s", snd_mixer_selem_channel_name(chn));
					first = 0;
				}
			}
			printf("\n");
		}
		if (snd_mixer_selem_has_playback_volume(elem) ||
		    snd_mixer_selem_has_capture_volume(elem)) {
			printf("%sLimits:", space);
			if (snd_mixer_selem_has_common_volume(elem)) {
				snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
				snd_mixer_selem_get_capture_volume_range(elem, &cmin, &cmax);
				printf(" %li - %li", pmin, pmax);
			} else {
				if (snd_mixer_selem_has_playback_volume(elem)) {
					snd_mixer_selem_get_playback_volume_range(elem, &pmin, &pmax);
					printf(" Playback %li - %li", pmin, pmax);
				}
				if (snd_mixer_selem_has_capture_volume(elem)) {
					snd_mixer_selem_get_capture_volume_range(elem, &cmin, &cmax);
					printf(" Capture %li - %li", cmin, cmax);
				}
			}
			printf("\n");
		}
		pmono = snd_mixer_selem_has_playback_channel(elem, SND_MIXER_SCHN_MONO) &&
		        (snd_mixer_selem_is_playback_mono(elem) || 
			 (!snd_mixer_selem_has_playback_volume(elem) &&
			  !snd_mixer_selem_has_playback_switch(elem)));
		cmono = snd_mixer_selem_has_capture_channel(elem, SND_MIXER_SCHN_MONO) &&
		        (snd_mixer_selem_is_capture_mono(elem) || 
			 (!snd_mixer_selem_has_capture_volume(elem) &&
			  !snd_mixer_selem_has_capture_switch(elem)));
#if 0
		printf("pmono = %i, cmono = %i (%i, %i, %i, %i)\n", pmono, cmono,
				snd_mixer_selem_has_capture_channel(elem, SND_MIXER_SCHN_MONO),
				snd_mixer_selem_is_capture_mono(elem),
				snd_mixer_selem_has_capture_volume(elem),
				snd_mixer_selem_has_capture_switch(elem));
#endif
		if (pmono || cmono) {
			if (!mono_ok) {
				printf("%s%s:", space, "Mono");
				mono_ok = 1;
			}
			if (snd_mixer_selem_has_common_volume(elem)) {
				snd_mixer_selem_get_playback_volume(elem, SND_MIXER_SCHN_MONO, &pvol);
				printf(" %s", get_percent(pvol, pmin, pmax));
				if (!snd_mixer_selem_get_playback_dB(elem, SND_MIXER_SCHN_MONO, &db)) {
					printf(" [");
					print_dB(db);
					printf("]");
				}
			}
			if (snd_mixer_selem_has_common_switch(elem)) {
				snd_mixer_selem_get_playback_switch(elem, SND_MIXER_SCHN_MONO, &psw);
				printf(" [%s]", psw ? "on" : "off");
			}
		}
		if (pmono && snd_mixer_selem_has_playback_channel(elem, SND_MIXER_SCHN_MONO)) {
			int title = 0;
			if (!mono_ok) {
				printf("%s%s:", space, "Mono");
				mono_ok = 1;
			}
			if (!snd_mixer_selem_has_common_volume(elem)) {
				if (snd_mixer_selem_has_playback_volume(elem)) {
					printf(" Playback");
					title = 1;
					snd_mixer_selem_get_playback_volume(elem, SND_MIXER_SCHN_MONO, &pvol);
					printf(" %s", get_percent(pvol, pmin, pmax));
					if (!snd_mixer_selem_get_playback_dB(elem, SND_MIXER_SCHN_MONO, &db)) {
						printf(" [");
						print_dB(db);
						printf("]");
					}
				}
			}
			if (!snd_mixer_selem_has_common_switch(elem)) {
				if (snd_mixer_selem_has_playback_switch(elem)) {
					if (!title)
						printf(" Playback");
					snd_mixer_selem_get_playback_switch(elem, SND_MIXER_SCHN_MONO, &psw);
					printf(" [%s]", psw ? "on" : "off");
				}
			}
		}
		if (cmono && snd_mixer_selem_has_capture_channel(elem, SND_MIXER_SCHN_MONO)) {
			int title = 0;
			if (!mono_ok) {
				printf("%s%s:", space, "Mono");
				mono_ok = 1;
			}
			if (!snd_mixer_selem_has_common_volume(elem)) {
				if (snd_mixer_selem_has_capture_volume(elem)) {
					printf(" Capture");
					title = 1;
					snd_mixer_selem_get_capture_volume(elem, SND_MIXER_SCHN_MONO, &cvol);
					printf(" %s", get_percent(cvol, cmin, cmax));
					if (!snd_mixer_selem_get_capture_dB(elem, SND_MIXER_SCHN_MONO, &db)) {
						printf(" [");
						print_dB(db);
						printf("]");
					}
				}
			}
			if (!snd_mixer_selem_has_common_switch(elem)) {
				if (snd_mixer_selem_has_capture_switch(elem)) {
					if (!title)
						printf(" Capture");
					snd_mixer_selem_get_capture_switch(elem, SND_MIXER_SCHN_MONO, &csw);
					printf(" [%s]", csw ? "on" : "off");
				}
			}
		}
		if (pmono || cmono)
			printf("\n");
		if (!pmono || !cmono) {
			for (chn = 0; chn <= SND_MIXER_SCHN_LAST; chn++) {
				if ((pmono || !snd_mixer_selem_has_playback_channel(elem, chn)) &&
				    (cmono || !snd_mixer_selem_has_capture_channel(elem, chn)))
					continue;
				printf("%s%s:", space, snd_mixer_selem_channel_name(chn));
				if (!pmono && !cmono && snd_mixer_selem_has_common_volume(elem)) {
					snd_mixer_selem_get_playback_volume(elem, chn, &pvol);
					printf(" %s", get_percent(pvol, pmin, pmax));
					if (!snd_mixer_selem_get_playback_dB(elem, chn, &db)) {
						printf(" [");
						print_dB(db);
						printf("]");
					}
				}
				if (!pmono && !cmono && snd_mixer_selem_has_common_switch(elem)) {
					snd_mixer_selem_get_playback_switch(elem, chn, &psw);
					printf(" [%s]", psw ? "on" : "off");
				}
				if (!pmono && snd_mixer_selem_has_playback_channel(elem, chn)) {
					int title = 0;
					if (!snd_mixer_selem_has_common_volume(elem)) {
						if (snd_mixer_selem_has_playback_volume(elem)) {
							printf(" Playback");
							title = 1;
							snd_mixer_selem_get_playback_volume(elem, chn, &pvol);
							printf(" %s", get_percent(pvol, pmin, pmax));
							if (!snd_mixer_selem_get_playback_dB(elem, chn, &db)) {
								printf(" [");
								print_dB(db);
								printf("]");
							}
						}
					}
					if (!snd_mixer_selem_has_common_switch(elem)) {
						if (snd_mixer_selem_has_playback_switch(elem)) {
							if (!title)
								printf(" Playback");
							snd_mixer_selem_get_playback_switch(elem, chn, &psw);
							printf(" [%s]", psw ? "on" : "off");
						}
					}
				}
				if (!cmono && snd_mixer_selem_has_capture_channel(elem, chn)) {
					int title = 0;
					if (!snd_mixer_selem_has_common_volume(elem)) {
						if (snd_mixer_selem_has_capture_volume(elem)) {
							printf(" Capture");
							title = 1;
							snd_mixer_selem_get_capture_volume(elem, chn, &cvol);
							printf(" %s", get_percent(cvol, cmin, cmax));
							if (!snd_mixer_selem_get_capture_dB(elem, chn, &db)) {
								printf(" [");
								print_dB(db);
								printf("]");
							}
						}
					}
					if (!snd_mixer_selem_has_common_switch(elem)) {
						if (snd_mixer_selem_has_capture_switch(elem)) {
							if (!title)
								printf(" Capture");
							snd_mixer_selem_get_capture_switch(elem, chn, &csw);
							printf(" [%s]", csw ? "on" : "off");
						}
					}
				}
				printf("\n");
			}
		}
	}
	return 0;
}

static int selems(int level)
{
	int err;
	snd_mixer_t *handle;