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/*
* Copyright (C) 2017, Microchip Technology Inc. and its subsidiaries.
* Author Tobias Jahnke
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#define _GNU_SOURCE
#define AFB_BINDING_VERSION 2
#include <string.h>
#include <time.h>
#include <assert.h>
#include <json-c/json.h>
#include <afb/afb-binding.h>
#include "wrap_volume.h"
#include "wrap_unicens.h"
#include "libmostvolume.h"
static int wrap_volume_service_timeout_cb(sd_event_source* source,
uint64_t timer __attribute__((__unused__)),
void *userdata __attribute__((__unused__))) {
uint8_t ret;
sd_event_source_unref(source);
ret = lib_most_volume_service();
if (ret != 0U) {
AFB_ERROR("lib_most_volume_service returns %d", ret);
}
return 0;
}
static void wrap_volume_service_cb(uint16_t timeout) {
uint64_t usec;
sd_event_now(afb_daemon_get_event_loop(), CLOCK_BOOTTIME, &usec);
sd_event_add_time( afb_daemon_get_event_loop(), NULL, CLOCK_MONOTONIC,
usec + (timeout*1000),
250,
wrap_volume_service_timeout_cb,
NULL);
}
/* Retrieves a new value adapted to a new maximum value. Minimum value is
* always zero. */
static int wrap_volume_calculate(int value, int max_old, int max_new) {
if (value > max_old)
value = max_old;
value = (value * max_new) / max_old; /* calculate range: 0..255 */
assert(value <= max_new);
return value;
}
extern int wrap_volume_init(void) {
uint8_t ret = 0U;
lib_most_volume_init_t mv_init;
mv_init.writei2c_cb = &wrap_ucs_i2cwrite;
mv_init.service_cb = wrap_volume_service_cb;
ret = lib_most_volume_init(&mv_init);
return ret * (-1);
}
extern int wrap_volume_master(int volume) {
int new_value, ret;
new_value = wrap_volume_calculate(volume, 100, 255);
ret = lib_most_volume_set(LIB_MOST_VOLUME_MASTER, (uint8_t)new_value);
if (ret != 0) {
AFB_ERROR("wrap_volume_master: volume library not ready.");
ret = ret * (-1); /* make return value negative */
}
return ret;
}
extern int wrap_volume_pcm(int *volume_ptr, int volume_sz) {
const int MAX_PCM_CHANNELS = 6;
int cnt, ret;
assert(volume_ptr != NULL);
assert(volume_sz <= MAX_PCM_CHANNELS);
for (cnt = 0; cnt < volume_sz; cnt ++) {
int new_value = wrap_volume_calculate(volume_ptr[cnt], 100, 255);
ret = lib_most_volume_set((enum lib_most_volume_channel_t)cnt, (uint8_t)new_value);
if (ret != 0) {
AFB_ERROR("wrap_volume_pcm: volume library not ready.");
ret = ret * (-1); /* make return value negative */
break;
}
}
return ret;
}
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