mirror of
https://github.com/alsa-project/alsa-utils
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386 lines
13 KiB
C
386 lines
13 KiB
C
/*****************************************************************************
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cinit.c - routines to initialize the mixer devices
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Written by Raistlinn (lansdoct@cs.alfred.edu)
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Copyright (C) 1998 by Christopher Lansdown
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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******************************************************************************/
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/*****************************************************************************/
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/* Begin #include's */
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#include "main.h"
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/* End #include's */
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/*****************************************************************************/
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/*****************************************************************************/
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/* Begin Global Variables */
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extern Card *card; /* And array of the cards */
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extern int cards; /* The number of cards in the system. */
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extern Config config; /* The system config */
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/* End Global Variables */
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/*****************************************************************************/
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/*****************************************************************************/
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/* Begin function prototypes */
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int init_group(void *handle, Group *group);
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int init_element_route(void *handle, snd_mixer_routes_t *routes, snd_mixer_eid_t *eid);
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int misc_group_hack(Mixer *mixer, int index);
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/* End function prototypes */
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/*****************************************************************************/
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int init_cards()
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{
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int i,j,k;
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int err;
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snd_ctl_t *handle;
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cards = snd_cards();
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card = calloc(cards, sizeof(Card));
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for(i = 0; i < cards; i++) {
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/* Open the hardware */
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if((err = snd_ctl_open(&handle, i)) < 0) {
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printf("Unable to open card #%i!\nError: %s\n", i, snd_strerror(err));
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card[i].mixer = NULL;
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card[i].number = -1;
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continue;
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} else {
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card[i].number = i;
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}
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/* Get the hardware info - the primary use of this is to find out how many
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mixer devices the card has, but it's also useful to find out the human-readable
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name of the card. */
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if((err = snd_ctl_hw_info(handle, &card[i].hw_info)) < 0) {
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printf("Unable to get hardware information about card #%i!\nError: %s\n",
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i, snd_strerror(err));
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printf("Trying to guess the appropriate values.\n");
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card[i].hw_info.mixerdevs = 1;
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}
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card[i].nmixers = card[i].hw_info.mixerdevs;
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/* Allocate out the mixer array */
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card[i].mixer = calloc(card[i].hw_info.mixerdevs, sizeof(Mixer));
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for(j = 0; j < card[i].hw_info.mixerdevs; j++) {
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/* Open the mixer to begin with. Isn't it funny how there's all this
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nice generalized code that can handle nearly any situation, and it
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will be necessary in only a very small percentage of the situations.
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Oh well, I guess that that's what distinguishes us from windows. :-) */
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if((err = snd_mixer_open(&card[i].mixer[j].handle, i, j)) < 0) {
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printf("Unable to open mixer #%i on card #%i~\nError: %s\n",
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j, i, snd_strerror(err));
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card[i].mixer[j].number = -1;
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} else {
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card[i].mixer[j].number = j;
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}
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/* Get the mixer info */
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if((err = snd_mixer_info(card[i].mixer[j].handle, &card[i].mixer[j].info)) < 0) {
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printf("Unable to get the info for mixer #%i on card %i! Error: %s\n", j, i, snd_strerror(err));
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printf("There's not much more I can do on this mixer.");
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printf(" Shutting it down.\n");
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if((err = snd_mixer_close(card[i].mixer[j].handle)) < 0) {
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printf("Oh well. I couldn't even close the mixer. I suspect that something is seriously wrong here. Good luck.\n");
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}
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card[i].mixer[j].number = -1;
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continue;
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}
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bzero(&card[i].mixer[j].groups, sizeof(snd_mixer_groups_t));
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if ((err = snd_mixer_groups(card[i].mixer[j].handle,
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&card[i].mixer[j].groups)) < 0) {
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printf("Mixer %i/%i groups error: %s",
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i, j, snd_strerror(err));
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return -1;
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}
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/* Allocate the space for the group array */
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card[i].mixer[j].groups.pgroups = (snd_mixer_gid_t *)
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calloc(card[i].mixer[j].groups.groups_over,
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sizeof(snd_mixer_gid_t));
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if (!card[i].mixer[j].groups.pgroups) {
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printf("No enough memory");
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return -1;
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}
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card[i].mixer[j].groups.groups_size = card[i].mixer[j].info.groups;
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card[i].mixer[j].groups.groups_over = card[i].mixer[j].groups.groups = 0;
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if ((err = snd_mixer_groups(card[i].mixer[j].handle,
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&card[i].mixer[j].groups)) < 0) {
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printf("Mixer %i/%i groups (2) error: %s",
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i, j, snd_strerror(err));
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return -1;
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}
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/* Allocate the space for the array of the groups - this is more than
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just their gid's, it's got group-specific info in it */
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card[i].mixer[j].group = calloc(card[i].mixer[j].info.groups + 1,
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sizeof(Group));
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/* get the group structures filled out */
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for(k = 0; k < card[i].mixer[j].info.groups; k++) {
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card[i].mixer[j].group[k].group.gid =
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card[i].mixer[j].groups.pgroups[k];
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init_group(card[i].mixer[j].handle,
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&card[i].mixer[j].group[k]);
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}
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misc_group_hack(&card[i].mixer[j], k);
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}
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if((err = snd_ctl_close(handle)) < 0) {
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printf("strange, there was an error closing card #%i!\nError: %s\n",
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i, snd_strerror(err));
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printf("Oh well.\n");
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}
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}
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/* return a successful execution. */
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return 0;
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}
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int misc_group_hack(Mixer *mixer, int index)
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{
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/* This code is largely copied straight from amixer. - God I love the GPL. */
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snd_mixer_elements_t elements;
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snd_mixer_eid_t *element;
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snd_mixer_group_t *group;
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int err, idx, gdx, idx2;
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int flag;
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int count=0; /* The count of elements not in any group */
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snd_mixer_eid_t **array;
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bzero(&elements, sizeof(elements));
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if ((err = snd_mixer_elements(mixer->handle, &elements)) < 0) {
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printf("Mixer elements error: %s", snd_strerror(err));
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return -1;
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}
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elements.pelements = (snd_mixer_eid_t *)malloc(elements.elements_over *
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sizeof(snd_mixer_eid_t));
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if (!elements.pelements) {
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printf("Not enough memory");
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return -1;
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}
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elements.elements_size = elements.elements_over;
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elements.elements_over = elements.elements = 0;
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if ((err = snd_mixer_elements(mixer->handle, &elements)) < 0) {
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printf("Mixer elements (2) error: %s", snd_strerror(err));
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return -1;
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}
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/* Allocate the temporary array to hold the mixer ID structs */
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array = malloc(elements.elements * sizeof(snd_mixer_eid_t *));
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if(!array)
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printf("Not enough memory.\n");
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for (idx = 0; idx < elements.elements; idx++) {
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element = &elements.pelements[idx];
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flag = 0; /* The flag will be set if the same element name & type
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is encountered */
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for(gdx = 0; gdx < mixer->info.groups; gdx++) {
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group = &mixer->group[gdx].group;
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for(idx2 = 0; idx2 < group->elements; idx2++) {
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if(group && element)
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if(group->pelements[idx2].type == element->type &&
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is_same(group->pelements[idx2].name, element->name))
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flag = 1;
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}
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}
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if(!flag) {
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/* We found a mixer element that's not in a group */
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array[count] = element;
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count++;
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if(count > elements.elements)
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printf("Houston, we have a problem.\n");
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}
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}
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/* Set up the group member */
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strncpy(mixer->group[index].group.gid.name, "Miscellaneous\0", 24);
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mixer->group[index].group.gid.index = 0;
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mixer->group[index].group.elements_size = 0; /* I hope that this doesn't matter */
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mixer->group[index].group.elements = count;
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mixer->group[index].group.elements_over = 0; /* I hope tha this doesn't matter */
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mixer->group[index].group.pelements = (snd_mixer_eid_t *)malloc(count *
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sizeof(snd_mixer_eid_t));
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mixer->group[index].routes = calloc(mixer->group[index].group.elements,
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sizeof(snd_mixer_routes_t));
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mixer->group[index].element = calloc(mixer->group[index].group.elements,
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sizeof(snd_mixer_element_t));
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mixer->group[index].einfo = calloc(mixer->group[index].group.elements,
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sizeof(snd_mixer_element_info_t));
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mixer->group[index].gtk = calloc(mixer->group[index].group.elements,
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sizeof(Gtk_Channel));
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/* Copy the snd_mixer_eid_t structures into the new group structure and init the routes */
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for(idx = 0; idx < count; idx++) {
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mixer->group[index].group.pelements[idx] = *array[idx];
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mixer->group[index].einfo[idx].eid = mixer->group[index].group.pelements[idx];
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if(snd_mixer_element_has_info(&mixer->group[index].group.pelements[idx]) == 1)
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if((err =
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snd_mixer_element_info_build(mixer->handle,
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&mixer->group[index].einfo[idx])) < 0) {
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printf("Unable to get element information for element %s! ",
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mixer->group[index].group.pelements[idx].name);
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printf("Error: %s.\n", snd_strerror(err));
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}
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mixer->group[index].element[idx].eid = mixer->group[index].group.pelements[idx];
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if(snd_mixer_element_has_control(&mixer->group[index].element[idx].eid))
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if((err = snd_mixer_element_build(mixer->handle,
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&mixer->group[index].element[idx])) < 0) {
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printf("Unable to read element %s! ",
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mixer->group[index].group.pelements[idx].name);
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printf("Error: %s.\n", snd_strerror(err));
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}
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init_element_route(mixer->handle,
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&mixer->group[index].routes[idx],
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&mixer->group[index].group.pelements[idx]);
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}
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/* Increase the number of groups to include the new group */
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mixer->info.groups++;
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if(elements.pelements)
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free(elements.pelements);
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if(array)
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free(array);
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return 1;
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}
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int init_group(void *handle, Group *group)
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{
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/* This is largely a mess copied from amixer that gets the group info in a very strange
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way, I wish that I knew how it really worked. Anyhow, once we get the group into
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and the info about the elements in the group, we'll set up the element array. */
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int idx, err;
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if((err = snd_mixer_group_read(handle,
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&group->group)) < 0) {
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printf("Unable to get info for group %s! ", group->group.gid.name);
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printf("Error: %s\n", snd_strerror(err));
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printf("elements_size = %i, elements_over=%i, elements=%i\n",
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group->group.elements_size,
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group->group.elements_over,
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group->group.elements);
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return 0;
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}
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group->group.pelements = (snd_mixer_eid_t *)calloc(group->group.elements_over,
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sizeof(snd_mixer_eid_t));
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if (!group->group.pelements) {
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printf("Not enough memory...");
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return 0;
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}
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group->group.elements_size = group->group.elements_over;
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group->group.elements = group->group.elements_over = 0;
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if ((err = snd_mixer_group_read(handle, &group->group)) < 0) {
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printf("Unable to get second group info for group %s. Error: %s\n",
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group->group.gid.name, snd_strerror(err));
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printf("elements_size = %i, elements_over=%i, elements=%i\n",
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group->group.elements_size,
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group->group.elements_over,
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group->group.elements);
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return 0;
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}
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/* Allocate out the arrays for the elements and element info */
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group->element = calloc(group->group.elements, sizeof(snd_mixer_element_t));
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group->einfo = calloc(group->group.elements, sizeof(snd_mixer_element_info_t));
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group->routes = calloc(group->group.elements, sizeof(snd_mixer_routes_t));
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group->gtk = calloc(group->group.elements, sizeof(Gtk_Channel));
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/* Now go through and get that info */
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for (idx = 0; idx < group->group.elements; idx++) {
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group->einfo[idx].eid = group->group.pelements[idx];
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if(snd_mixer_element_has_info(&group->group.pelements[idx]) == 1)
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if((err = snd_mixer_element_info_build(handle, &group->einfo[idx])) < 0) {
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printf("Unable to get element information for element %s! ",
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group->group.pelements[idx].name);
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printf("Error: %s.\n", snd_strerror(err));
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}
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group->element[idx].eid = group->group.pelements[idx];
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if((err = snd_mixer_element_build(handle, &group->element[idx])) < 0) {
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printf("Unable to read element %s! ",
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group->group.pelements[idx].name);
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printf("Error: %s.\n", snd_strerror(err));
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}
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init_element_route(handle, &group->routes[idx], &group->group.pelements[idx]);
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}
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return 1;
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}
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int init_element_route(void *handle, snd_mixer_routes_t *routes, snd_mixer_eid_t *eid)
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{
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int err, idx;
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/* Most of this code is taken straight from amixer as well. */
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/* This just gets the routes for the mixer element and stores them. */
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bzero(routes, sizeof(snd_mixer_routes_t));
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routes->eid = *eid;
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if ((err = snd_mixer_routes(handle, routes)) < 0) {
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printf("Element %s route error: %s", eid->name, snd_strerror(err));
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return -1;
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}
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if (!routes->routes_over)
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return 0;
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routes->proutes = (snd_mixer_eid_t *)malloc(routes->routes_over *
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sizeof(snd_mixer_eid_t));
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if (!routes->proutes) {
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printf("No enough memory...");
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return -1;
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}
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routes->routes_size = routes->routes_over;
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routes->routes = routes->routes_over = 0;
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if ((err = snd_mixer_routes(handle, routes)) < 0) {
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printf("Element (2) %s route error: %s", eid->name, snd_strerror(err));
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return -1;
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}
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return 1;
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}
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