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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 LOG_TAG "ConsumerIrHal"
#include <cutils/log.h>
#include <errno.h>
#include <fcntl.h>
#include <hardware/hardware.h>
#include <hardware/consumerir.h>
#include <malloc.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <samsung_consumerir.h>
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
#define UNUSED __attribute__((unused))
static int fd = 0;
static pthread_mutex_t g_mtx;
static bool try_append_number(char *buffer, int *len, int size, int number)
{
int stored;
stored = snprintf(&buffer[*len], size - *len, "%d,", number);
if (stored < 0 || stored >= (size - *len))
return false;
*len += stored;
return true;
}
static bool grow_buffer(char **buffer, int *size)
{
char *new_buffer;
*size *= 2;
new_buffer = realloc(*buffer, *size);
if (new_buffer == NULL)
return false;
*buffer = new_buffer;
return true;
}
static bool append_number(char **buffer, int *len, int *size, int number)
{
if (try_append_number(*buffer, len, *size, number))
return true;
if (!grow_buffer(buffer, size))
return false;
return try_append_number(*buffer, len, *size, number);
}
static int consumerir_transmit(UNUSED struct consumerir_device *dev,
int carrier_freq, const int pattern[], int pattern_len)
{
int buffer_len = 0;
int buffer_size = 128;
int i;
float factor;
char *buffer;
pthread_mutex_lock(&g_mtx);
buffer = malloc(buffer_size);
if (buffer == NULL)
return -ENOMEM;
// Write the header
if (!append_number(&buffer, &buffer_len, &buffer_size, carrier_freq))
goto error;
#ifndef MS_IR_SIGNAL
// Calculate factor of conversion from microseconds to pulses
factor = 1000000 / carrier_freq;
#else
factor = 1;
#endif
// Write out the timing pattern
for (i = 0; i < pattern_len; i++) {
if (!append_number(&buffer, &buffer_len, &buffer_size,
(int) (pattern[i] / factor)))
goto error;
}
buffer[buffer_len - 1] = 0;
write(fd, buffer, buffer_len - 1);
free(buffer);
pthread_mutex_unlock(&g_mtx);
return 0;
error:
free(buffer);
return -ENOMEM;
}
static int consumerir_get_num_carrier_freqs(UNUSED struct consumerir_device *dev)
{
return ARRAY_SIZE(consumerir_freqs);
}
static int consumerir_get_carrier_freqs(struct consumerir_device *dev,
size_t len, consumerir_freq_range_t *ranges)
{
size_t to_copy = consumerir_get_num_carrier_freqs(dev);
to_copy = len < to_copy ? len : to_copy;
memcpy(ranges, consumerir_freqs, to_copy * sizeof(consumerir_freq_range_t));
return to_copy;
}
static int consumerir_close(hw_device_t *dev)
{
free(dev);
close(fd);
pthread_mutex_destroy(&g_mtx);
return 0;
}
/*
* Generic device handling
*/
static int consumerir_open(const hw_module_t *module, const char *name,
hw_device_t **device)
{
if (strcmp(name, CONSUMERIR_TRANSMITTER) != 0)
return -EINVAL;
if (device == NULL) {
ALOGE("NULL device on open");
return -EINVAL;
}
consumerir_device_t *dev = malloc(sizeof(consumerir_device_t));
memset(dev, 0, sizeof(consumerir_device_t));
dev->common.tag = HARDWARE_DEVICE_TAG;
dev->common.tag = HARDWARE_DEVICE_TAG;
dev->common.version = 0;
dev->common.module = (struct hw_module_t*) module;
dev->common.close = consumerir_close;
dev->transmit = consumerir_transmit;
dev->get_carrier_freqs = consumerir_get_carrier_freqs;
dev->get_num_carrier_freqs = consumerir_get_num_carrier_freqs;
pthread_mutex_init(&g_mtx, NULL);
*device = (hw_device_t*) dev;
fd = open(IR_PATH, O_RDWR);
return fd;
}
static struct hw_module_methods_t consumerir_module_methods = {
.open = consumerir_open,
};
consumerir_module_t HAL_MODULE_INFO_SYM = {
.common = {
.tag = HARDWARE_MODULE_TAG,
.module_api_version = CONSUMERIR_MODULE_API_VERSION_1_0,
.hal_api_version = HARDWARE_HAL_API_VERSION,
.id = CONSUMERIR_HARDWARE_MODULE_ID,
.name = "Consumer IR Module",
.author = "The CyanogenMod Project",
.methods = &consumerir_module_methods,
},
};
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