| /* |
| * SALSA-Lib - Global card functions |
| * |
| * Copyright (c) 2007-2011 by Takashi Iwai <tiwai@suse.de> |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as |
| * published by the Free Software Foundation; either version 2.1 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| #include "control.h" |
| #include "local.h" |
| |
| int _snd_set_nonblock(int fd, int nonblock) |
| { |
| long flags; |
| flags = fcntl(fd, F_GETFL); |
| if (flags < 0) |
| return -errno; |
| if (nonblock) |
| flags |= O_NONBLOCK; |
| else |
| flags &= ~O_NONBLOCK; |
| if (fcntl(fd, F_SETFL, flags) < 0) |
| return -errno; |
| return 0; |
| } |
| |
| #define SND_FILE_CONTROL SALSA_DEVPATH "/controlC%i" |
| |
| int snd_card_load(int card) |
| { |
| char control[sizeof(SND_FILE_CONTROL) + 10]; |
| sprintf(control, SND_FILE_CONTROL, card); |
| return !access(control, R_OK); |
| } |
| |
| int snd_card_next(int *rcard) |
| { |
| int card; |
| |
| if (rcard == NULL) |
| return -EINVAL; |
| card = *rcard; |
| card = card < 0 ? 0 : card + 1; |
| for (; card < 32; card++) { |
| if (snd_card_load(card)) { |
| *rcard = card; |
| return 0; |
| } |
| } |
| *rcard = -1; |
| return 0; |
| } |
| |
| int _snd_ctl_hw_open(snd_ctl_t **ctlp, int card) |
| { |
| char name[16]; |
| sprintf(name, "hw:%d", card); |
| return snd_ctl_open(ctlp, name, 0); |
| } |
| |
| static int get_card_info(int card, snd_ctl_card_info_t *info) |
| { |
| int err; |
| snd_ctl_t *handle; |
| |
| memset(info, 0, sizeof(*info)); |
| err = _snd_ctl_hw_open(&handle, card); |
| if (err < 0) |
| return err; |
| err = snd_ctl_card_info(handle, info); |
| snd_ctl_close(handle); |
| return err; |
| } |
| |
| static int snd_card_load2(const char *control) |
| { |
| int open_dev; |
| snd_ctl_card_info_t info; |
| |
| open_dev = open(control, O_RDONLY); |
| if (open_dev < 0) |
| return -errno; |
| if (ioctl(open_dev, SNDRV_CTL_IOCTL_CARD_INFO, &info) < 0) { |
| int err = -errno; |
| close(open_dev); |
| return err; |
| } |
| close(open_dev); |
| return info.card; |
| } |
| |
| int snd_card_get_index(const char *string) |
| { |
| int card; |
| snd_ctl_card_info_t info; |
| |
| if (!string || *string == '\0') |
| return -EINVAL; |
| if (*string == '/') /* device name */ |
| return snd_card_load2(string); |
| if (sscanf(string, "%i", &card) == 1) { |
| if (card < 0 || card > 31) |
| return -EINVAL; |
| if (snd_card_load(card)) |
| return card; |
| return -ENODEV; |
| } |
| for (card = 0; card < 32; card++) { |
| if (!snd_card_load(card)) |
| continue; |
| if (get_card_info(card, &info) < 0) |
| continue; |
| if (!strcmp((const char *)info.id, string)) |
| return card; |
| } |
| return -ENODEV; |
| } |
| |
| int snd_card_get_name(int card, char **name) |
| { |
| snd_ctl_card_info_t info; |
| int err; |
| |
| err = get_card_info(card, &info); |
| if (err < 0) |
| return err; |
| *name = strdup((const char *)info.name); |
| if (*name == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| int snd_card_get_longname(int card, char **name) |
| { |
| snd_ctl_card_info_t info; |
| int err; |
| |
| err = get_card_info(card, &info); |
| if (err < 0) |
| return err; |
| *name = strdup((const char *)info.longname); |
| if (*name == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| int _snd_dev_get_device(const char *name, int *cardp, int *devp, int *subdevp) |
| { |
| int card; |
| *cardp = 0; |
| if (devp) |
| *devp = 0; |
| if (subdevp) |
| *subdevp = -1; |
| if (!strcmp(name, "hw") || !strcmp(name, "default")) |
| return 0; |
| if (!strncmp(name, "hw:", 3)) |
| name += 3; |
| else if (!strncmp(name, "default:", 8)) |
| name += 8; |
| else |
| return -EINVAL; |
| card = snd_card_get_index(name); |
| if (card < 0) |
| return card; |
| *cardp = card; |
| if (devp && subdevp) { |
| /* parse the secondary and third arguments (if any) */ |
| name = strchr(name, ','); |
| if (name) |
| sscanf(name, ",%d,%d", devp, subdevp); |
| } |
| return 0; |
| } |
| |
| snd_config_t *snd_config; /* placeholder */ |