alsa-utils/alsactl/merge.c

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/*
* Advanced Linux Sound Architecture Control Program
* Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "alsactl.h"
static int merge_one_control(struct ctl_control *cctl, struct ctl_control *uctl, int cardno)
{
int idx;
if (!(cctl->info.access & SND_CONTROL_ACCESS_WRITE))
return 0;
switch (cctl->info.type) {
case SND_CONTROL_TYPE_BOOLEAN:
if (uctl->type != SND_CONTROL_TYPE_BOOLEAN) {
error("A wrong type %i for the control '%s'. The type integer is expected. Skipping...", uctl->type, control_id(&uctl->c.id));
return 1;
}
for (idx = 0; idx < cctl->info.values_count; idx++) {
if (cctl->c.value.integer.value[idx] != uctl->c.value.integer.value[idx]) {
cctl->change = 1;
cctl->c.value.integer.value[idx] = uctl->c.value.integer.value[idx];
}
}
break;
case SND_CONTROL_TYPE_INTEGER:
if (uctl->type != SND_CONTROL_TYPE_INTEGER) {
error("A wrong type %i for the control '%s'. The type integer is expected. Skipping...", uctl->type, control_id(&uctl->c.id));
return 1;
}
for (idx = 0; idx < cctl->info.values_count; idx++) {
if (cctl->info.value.integer.min > uctl->c.value.integer.value[idx] ||
cctl->info.value.integer.max < uctl->c.value.integer.value[idx]) {
error("The value %li for the control '%s' is out of range %i-%i.", uctl->c.value.integer.value[idx], control_id(&uctl->c.id), cctl->info.value.integer.min, cctl->info.value.integer.max);
return 1;
}
if (cctl->c.value.integer.value[idx] != uctl->c.value.integer.value[idx]) {
cctl->change = 1;
cctl->c.value.integer.value[idx] = uctl->c.value.integer.value[idx];
}
}
break;
case SND_CONTROL_TYPE_ENUMERATED:
if (uctl->type != SND_CONTROL_TYPE_ENUMERATED) {
error("A wrong type %i for the control '%s'. The type integer is expected. Skipping...", uctl->type, control_id(&uctl->c.id));
return 1;
}
for (idx = 0; idx < cctl->info.values_count; idx++) {
if (cctl->info.value.enumerated.items <= uctl->c.value.enumerated.item[idx]) {
error("The value %u for the control '%s' is out of range 0-%i.", uctl->c.value.integer.value[idx], control_id(&uctl->c.id), cctl->info.value.enumerated.items-1);
return 1;
}
if (cctl->c.value.enumerated.item[idx] != uctl->c.value.enumerated.item[idx]) {
cctl->change = 1;
cctl->c.value.enumerated.item[idx] = uctl->c.value.enumerated.item[idx];
}
}
break;
case SND_CONTROL_TYPE_BYTES:
if (uctl->type != SND_CONTROL_TYPE_BYTES) {
error("A wrong type %i for the control %s. The type 'bytes' is expected. Skipping...", uctl->type, control_id(&uctl->c.id));
return 1;
}
if (memcmp(cctl->c.value.bytes.data, uctl->c.value.bytes.data, uctl->info.values_count)) {
cctl->change = 1;
memcpy(cctl->c.value.bytes.data, uctl->c.value.bytes.data, uctl->info.values_count);
}
break;
default:
error("The control type %i is not known.", cctl->type);
}
return 0;
}
static int soundcard_setup_merge_control(struct ctl_control *cctl, struct ctl_control *uctl, int cardno)
{
struct ctl_control *cctl1;
for ( ; uctl; uctl = uctl->next) {
for (cctl1 = cctl; cctl1; cctl1 = cctl1->next) {
if (cctl1->c.id.iface == uctl->c.id.iface &&
cctl1->c.id.device == uctl->c.id.device &&
cctl1->c.id.subdevice == uctl->c.id.subdevice &&
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!strncmp(cctl1->c.id.name, uctl->c.id.name, sizeof(cctl1->c.id.name)) &&
cctl1->c.id.index == uctl->c.id.index) {
merge_one_control(cctl1, uctl, cardno);
break;
}
}
if (!cctl1) {
error("Cannot find the control %s...", control_id(&uctl->c.id));
}
}
return 0;
}
int soundcard_setup_merge_controls(int cardno)
{
struct soundcard *soundcard, *rsoundcard;
for (rsoundcard = rsoundcards; rsoundcard; rsoundcard = rsoundcard->next) {
for (soundcard = soundcards; soundcard; soundcard = soundcard->next) {
if (!strncmp(soundcard->control.hwinfo.id, rsoundcard->control.hwinfo.id, sizeof(soundcard->control.hwinfo.id)))
break;
}
if (!soundcard) {
error("The soundcard '%s' was not found...\n", rsoundcard->control.hwinfo.id);
continue;
}
if (cardno >= 0 && soundcard->no != cardno)
continue;
soundcard_setup_merge_control(soundcard->control.controls, rsoundcard->control.controls, soundcard->no);
}
return 0;
}
static int soundcard_open_ctl(snd_ctl_t **ctlhandle, struct soundcard *soundcard)
{
int err;
if (*ctlhandle)
return 0;
if ((err = snd_ctl_open(ctlhandle, soundcard->no)) < 0) {
error("Cannot open control interface for soundcard #%i.", soundcard->no + 1);
return 1;
}
return 0;
}
int soundcard_setup_process_controls(int cardno)
{
int err;
snd_ctl_t *ctlhandle = NULL;
struct soundcard *soundcard;
struct ctl_control *ctl;
for (soundcard = soundcards; soundcard; soundcard = soundcard->next) {
if (cardno >= 0 && soundcard->no != cardno)
continue;
for (ctl = soundcard->control.controls; ctl; ctl = ctl->next) {
if (ctl->change)
if (!soundcard_open_ctl(&ctlhandle, soundcard)) {
if ((err = snd_ctl_cwrite(ctlhandle, &ctl->c)) < 0)
error("Control '%s' write error: %s", control_id(&ctl->c.id), snd_strerror(err));
}
}
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if (ctlhandle) {
snd_ctl_close(ctlhandle);
ctlhandle = NULL;
}
}
return 0;
}