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mixer_cache.c
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mixer_cache.c
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/*
* mixer_cache.c
*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <tinyalsa/asoundlib.h>
#include "mixer_cache.h"
int mixer_cache_init(struct audio_tool_mixer_cache *cache)
{
if (!cache)
return EINVAL;
memset(cache, 0, sizeof(struct audio_tool_mixer_cache));
return 0;
}
void mixer_cache_deinit(struct audio_tool_mixer_cache *cache)
{
if (!cache)
return;
if (!cache->ctrls)
return;
free(cache->ctrls);
}
int mixer_cache_populate(struct audio_tool_mixer_cache *cache, struct mixer *mixer)
{
struct mixer_ctl *ctl;
struct audio_tool_mixer_control_info *cur;
const char* name;
size_t count, n, v;
int tmp;
if (!cache)
return EINVAL;
if (!mixer)
return EINVAL;
if (cache->ctrls)
free(cache->ctrls);
count = mixer_get_num_ctls(mixer);
cache->count = count;
if (count) {
cache->ctrls = calloc(count, sizeof(struct audio_tool_mixer_control_info));
if (! cache->ctrls)
return -ENOMEM;
}
for (n = 0, cur = cache->ctrls ; n < count ; ++n, ++cur) {
ctl = mixer_get_ctl(mixer, n);
if (!ctl)
return ENODEV;
name = mixer_ctl_get_name(ctl);
if (!name)
return ENODEV;
cur->id = n;
cur->type = mixer_ctl_get_type(ctl);
strcpy(cur->name, name);
cur->num_values = mixer_ctl_get_num_values(ctl);
if (cur->num_values > MAX_NUM_VALUES)
cur->num_values = MAX_NUM_VALUES;
for (v = 0 ; v < cur->num_values ; ++v) {
switch (cur->type) {
case MIXER_CTL_TYPE_BOOL:
case MIXER_CTL_TYPE_INT:
cur->value.integer[v] = mixer_ctl_get_value(ctl, v);
break;
case MIXER_CTL_TYPE_ENUM:
tmp = mixer_ctl_get_value(ctl, v);
name = mixer_ctl_get_enum_string(ctl, tmp);
// null value names were causing seg fault here
if (name)
strcpy(cur->value.enumerated[v], name);
else
printf("Skipping ENUM due to null setting for %s\n", cur->name);
break;
case MIXER_CTL_TYPE_BYTE:
cur->value.byte[v] = mixer_ctl_get_value(ctl, v);
break;
case MIXER_CTL_TYPE_INT64:
cur->value.integer64[v] = mixer_ctl_get_value(ctl, v);
break;
default:
(void)0;
}
}
}
return 0;
}
int mixer_cache_apply(struct audio_tool_mixer_cache *cache, struct mixer *mixer)
{
struct audio_tool_mixer_control_info *cur;
struct mixer_ctl *ctl;
int n, k, ret=0;
for (n = 0 ; n < cache->count ; ++n) {
cur = &cache->ctrls[n];
ctl = mixer_get_ctl(mixer, n);
for (k = 0 ; k < cur->num_values ; ++k) {
switch (cur->type) {
case MIXER_CTL_TYPE_BOOL:
case MIXER_CTL_TYPE_INT:
mixer_ctl_set_value(ctl, k, cur->value.integer[k]);
break;
case MIXER_CTL_TYPE_ENUM:
mixer_ctl_set_enum_by_string(ctl, cur->value.enumerated[k]);
break;
case MIXER_CTL_TYPE_BYTE:
mixer_ctl_set_value(ctl, k, cur->value.byte[k]);
break;
case MIXER_CTL_TYPE_INT64:
mixer_ctl_set_value(ctl, k, cur->value.integer64[k]);
break;
default:
ret = 1;
}
}
}
return ret;
}
int mixer_cache_get_id_by_name(struct audio_tool_mixer_cache *cache, const char* name)
{
struct audio_tool_mixer_control_info *cur;
if (!cache)
return -EINVAL;
if (!name)
return -EINVAL;
for (cur = cache->ctrls ; cur < (cache->ctrls + cache->count) ; ++cur) {
if (strcmp(cur->name, name) == 0)
return cur->id;
}
return -ENODEV;
}
void mixer_cache_reset_touch(struct audio_tool_mixer_cache *cache)
{
struct audio_tool_mixer_control_info *cur;
if (!cache)
return;
for (cur = cache->ctrls ; cur < (cache->ctrls + cache->count) ; ++cur) {
cur->touch = 0;
}
}
void mixer_cache_touch(struct audio_tool_mixer_cache *cache, int id)
{
if (!cache)
return;
if (id < 0)
return;
if (id > cache->count)
return;
cache->ctrls[id].touch = 1;
}
int mixer_cache_audit_touch(struct audio_tool_mixer_cache *cache, int verbose)
{
struct audio_tool_mixer_control_info *cur;
int ret = 0;
if (!cache)
return EINVAL;
for (cur = cache->ctrls ; cur < (cache->ctrls + cache->count) ; ++cur) {
if (!cur->touch) {
ret = 1;
if (verbose) {
fprintf(stderr, "Warning: Control #%d (%s) was not touched\n",
cur->id, cur->name);
}
}
}
return ret;
}