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/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <syslog.h>
#include "cras_util.h"
#include "cras_volume_curve.h"
#include "iniparser_wrapper.h"
#include "utlist.h"
struct cras_card_config {
dictionary *ini;
};
static struct cras_volume_curve *
create_simple_step_curve(const struct cras_card_config *card_config,
const char *control_name)
{
char ini_key[MAX_INI_KEY_LENGTH + 1];
int max_volume;
int volume_step;
snprintf(ini_key, MAX_INI_KEY_LENGTH, "%s:max_volume", control_name);
ini_key[MAX_INI_KEY_LENGTH] = 0;
max_volume = iniparser_getint(card_config->ini, ini_key, 0);
snprintf(ini_key, MAX_INI_KEY_LENGTH, "%s:volume_step", control_name);
ini_key[MAX_INI_KEY_LENGTH] = 0;
volume_step = iniparser_getint(card_config->ini, ini_key, 300);
syslog(LOG_INFO, "Configure curve found for %s.", control_name);
return cras_volume_curve_create_simple_step(max_volume, volume_step);
}
static struct cras_volume_curve *
create_explicit_curve(const struct cras_card_config *card_config,
const char *control_name)
{
unsigned int i;
char ini_key[MAX_INI_KEY_LENGTH + 1];
long dB_values[101];
for (i = 0; i < 101; i++) {
snprintf(ini_key, MAX_INI_KEY_LENGTH, "%s:dB_at_%u",
control_name, i);
ini_key[MAX_INI_KEY_LENGTH] = 0;
dB_values[i] = iniparser_getint(card_config->ini, ini_key, 0);
}
syslog(LOG_INFO, "Explicit volume curve found for %s.", control_name);
return cras_volume_curve_create_explicit(dB_values);
}
/*
* Exported interface.
*/
struct cras_card_config *cras_card_config_create(const char *config_path,
const char *card_name)
{
struct cras_card_config *card_config = NULL;
char ini_name[MAX_INI_NAME_LENGTH + 1];
dictionary *ini;
snprintf(ini_name, MAX_INI_NAME_LENGTH, "%s/%s", config_path,
card_name);
ini_name[MAX_INI_NAME_LENGTH] = '\0';
ini = iniparser_load_wrapper(ini_name);
if (ini == NULL) {
syslog(LOG_DEBUG, "No ini file %s", ini_name);
return NULL;
}
card_config = calloc(1, sizeof(*card_config));
if (card_config == NULL) {
iniparser_freedict(ini);
return NULL;
}
card_config->ini = ini;
syslog(LOG_DEBUG, "Loaded ini file %s", ini_name);
return card_config;
}
void cras_card_config_destroy(struct cras_card_config *card_config)
{
assert(card_config);
iniparser_freedict(card_config->ini);
free(card_config);
}
struct cras_volume_curve *cras_card_config_get_volume_curve_for_control(
const struct cras_card_config *card_config, const char *control_name)
{
char ini_key[MAX_INI_KEY_LENGTH + 1];
const char *curve_type;
if (card_config == NULL || control_name == NULL)
return NULL;
snprintf(ini_key, MAX_INI_KEY_LENGTH, "%s:volume_curve", control_name);
ini_key[MAX_INI_KEY_LENGTH] = 0;
curve_type = iniparser_getstring(card_config->ini, ini_key, NULL);
if (curve_type && strcmp(curve_type, "simple_step") == 0)
return create_simple_step_curve(card_config, control_name);
if (curve_type && strcmp(curve_type, "explicit") == 0)
return create_explicit_curve(card_config, control_name);
syslog(LOG_DEBUG, "No configure curve found for %s.", control_name);
return NULL;
}
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