a22ea508a6
According to: https://developer.android.com/reference/android/hardware/ConsumerIrManager.html#transmit%28int,%20int[]%29 the pattern is supposed to be in ms. Apparently Samsung and HTC in versions 4.4.2 and earlier of Android were treating this as the number of pulses instead of ms. This is what our HAL is supporting because it mimic'ed what the vendors were doing. However, we should switch to the correct spec of the pattern (ms) and eventually this will cause apps to converge on the right patterns. Currently, this change will break half the existing apps and cause the other half of the apps to stop being broken and to start working. Change-Id: I87cedcc8e0b85d7b96ed63c7d4f82cc53ecb4ecb
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "ConsumerIrHal"
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <cutils/log.h>
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#include <hardware/hardware.h>
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#include <hardware/consumerir.h>
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#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
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static const consumerir_freq_range_t consumerir_freqs[] = {
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{.min = 30000, .max = 30000},
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{.min = 33000, .max = 33000},
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{.min = 36000, .max = 36000},
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{.min = 38000, .max = 38000},
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{.min = 40000, .max = 40000},
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{.min = 56000, .max = 56000},
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};
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int fd = 0;
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static int consumerir_transmit(struct consumerir_device *dev,
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int carrier_freq, int pattern[], int pattern_len)
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{
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int strlen;
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int i;
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char buffer[1024];
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memset(buffer, 0, 1024);
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/* write the header */
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strlen = sprintf(buffer, "%d,", carrier_freq);
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/* calculate factor of conversion from microseconds to pulses */
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float factor = 1000000 / carrier_freq;
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/* write out the timing pattern */
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for (i = 0; i < pattern_len; i++)
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{
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strlen += sprintf(buffer + strlen, "%d,", (int) (pattern[i]/factor));
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}
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buffer[strlen - 1] = 0;
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write(fd, buffer, strlen - 1);
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return 0;
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}
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static int consumerir_get_num_carrier_freqs(struct consumerir_device *dev)
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{
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return ARRAY_SIZE(consumerir_freqs);
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}
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static int consumerir_get_carrier_freqs(struct consumerir_device *dev,
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size_t len, consumerir_freq_range_t *ranges)
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{
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size_t to_copy = ARRAY_SIZE(consumerir_freqs);
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to_copy = len < to_copy ? len : to_copy;
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memcpy(ranges, consumerir_freqs, to_copy * sizeof(consumerir_freq_range_t));
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return to_copy;
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}
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static int consumerir_close(hw_device_t *dev)
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{
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free(dev);
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close(fd);
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return 0;
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}
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/*
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* Generic device handling
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*/
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static int consumerir_open(const hw_module_t* module, const char* name,
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hw_device_t** device)
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{
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if (strcmp(name, CONSUMERIR_TRANSMITTER) != 0) {
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return -EINVAL;
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}
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if (device == NULL) {
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ALOGE("NULL device on open");
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return -EINVAL;
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}
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consumerir_device_t *dev = malloc(sizeof(consumerir_device_t));
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memset(dev, 0, sizeof(consumerir_device_t));
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dev->common.tag = HARDWARE_DEVICE_TAG;
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dev->common.version = 0;
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dev->common.module = (struct hw_module_t*) module;
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dev->common.close = consumerir_close;
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dev->transmit = consumerir_transmit;
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dev->get_num_carrier_freqs = consumerir_get_num_carrier_freqs;
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dev->get_carrier_freqs = consumerir_get_carrier_freqs;
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*device = (hw_device_t*) dev;
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fd = open("/sys/class/sec/sec_ir/ir_send", O_RDWR);
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return 0;
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}
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static struct hw_module_methods_t consumerir_module_methods = {
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.open = consumerir_open,
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};
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consumerir_module_t HAL_MODULE_INFO_SYM = {
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.common = {
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.tag = HARDWARE_MODULE_TAG,
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.module_api_version = CONSUMERIR_MODULE_API_VERSION_1_0,
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.hal_api_version = HARDWARE_HAL_API_VERSION,
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.id = CONSUMERIR_HARDWARE_MODULE_ID,
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.name = "Consumer IR Module",
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.author = "The CyanogenMod Project",
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.methods = &consumerir_module_methods,
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},
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};
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