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/*
* Copyright (C) 2024 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 "DisplayLuts"
#include <android/display_luts.h>
#include <display_luts_private.h>
#include <utils/Log.h>
#include <cmath>
#define ADISPLAYLUTS_BUFFER_LENGTH_LIMIT (100000)
#define CHECK_NOT_NULL(name) \
LOG_ALWAYS_FATAL_IF(name == nullptr, "nullptr passed as " #name " argument");
ADisplayLutsEntry* ADisplayLutsEntry_createEntry(float* buffer, int32_t length,
ADisplayLuts_Dimension dimension,
ADisplayLuts_SamplingKey key) {
CHECK_NOT_NULL(buffer);
LOG_ALWAYS_FATAL_IF(length >= ADISPLAYLUTS_BUFFER_LENGTH_LIMIT,
"the lut raw buffer length is too big to handle");
if (dimension != ADISPLAYLUTS_ONE_DIMENSION && dimension != ADISPLAYLUTS_THREE_DIMENSION) {
LOG_ALWAYS_FATAL("the lut dimension is be either 1 or 3");
}
int32_t size = 0;
if (dimension == ADISPLAYLUTS_THREE_DIMENSION) {
LOG_ALWAYS_FATAL_IF(length % 3 != 0, "the 3d lut raw buffer is not divisible by 3");
int32_t lengthPerChannel = length / 3;
float sizeForDim = std::cbrt(static_cast<float>(lengthPerChannel));
LOG_ALWAYS_FATAL_IF(sizeForDim != (int)(sizeForDim),
"the 3d lut buffer length is incorrect");
size = (int)sizeForDim;
} else {
size = length;
}
LOG_ALWAYS_FATAL_IF(size < 2, "the lut size for each dimension is too small");
ADisplayLutsEntry* entry = new ADisplayLutsEntry();
entry->buffer.data.resize(length);
std::copy(buffer, buffer + length, entry->buffer.data.begin());
entry->properties = {dimension, size, key};
entry->incStrong((void*)ADisplayLutsEntry_createEntry);
return static_cast<ADisplayLutsEntry*>(entry);
}
void ADisplayLutsEntry_destroy(ADisplayLutsEntry* entry) {
if (entry != NULL) {
entry->decStrong((void*)ADisplayLutsEntry_createEntry);
}
}
ADisplayLuts_Dimension ADisplayLutsEntry_getDimension(const ADisplayLutsEntry* entry) {
CHECK_NOT_NULL(entry);
return entry->properties.dimension;
}
int32_t ADisplayLutsEntry_getSize(const ADisplayLutsEntry* entry) {
CHECK_NOT_NULL(entry);
return entry->properties.size;
}
ADisplayLuts_SamplingKey ADisplayLutsEntry_getSamplingKey(const ADisplayLutsEntry* entry) {
CHECK_NOT_NULL(entry);
return entry->properties.samplingKey;
}
const float* ADisplayLutsEntry_getBuffer(const ADisplayLutsEntry* _Nonnull entry) {
CHECK_NOT_NULL(entry);
return entry->buffer.data.data();
}
ADisplayLuts* ADisplayLuts_create() {
ADisplayLuts* luts = new ADisplayLuts();
if (luts == NULL) {
delete luts;
return NULL;
}
luts->incStrong((void*)ADisplayLuts_create);
return static_cast<ADisplayLuts*>(luts);
}
void ADisplayLuts_clearLuts(ADisplayLuts* luts) {
for (auto& entry : luts->entries) {
entry->decStrong((void*)ADisplayLuts_setEntries); // Decrement ref count
}
luts->entries.clear();
luts->offsets.clear();
luts->totalBufferSize = 0;
}
void ADisplayLuts_destroy(ADisplayLuts* luts) {
if (luts != NULL) {
ADisplayLuts_clearLuts(luts);
luts->decStrong((void*)ADisplayLuts_create);
}
}
void ADisplayLuts_setEntries(ADisplayLuts* luts, ADisplayLutsEntry** entries, int32_t numEntries) {
CHECK_NOT_NULL(luts);
// always clear the previously set lut(s)
ADisplayLuts_clearLuts(luts);
// do nothing
if (!entries || numEntries == 0) {
return;
}
LOG_ALWAYS_FATAL_IF(numEntries > 2, "The number of entries should be not over 2!");
if (numEntries == 2 && entries[0]->properties.dimension != ADISPLAYLUTS_ONE_DIMENSION &&
entries[1]->properties.dimension != ADISPLAYLUTS_THREE_DIMENSION) {
LOG_ALWAYS_FATAL("The entries should be 1D and 3D in order!");
}
luts->offsets.reserve(numEntries);
luts->entries.reserve(numEntries);
for (int32_t i = 0; i < numEntries; i++) {
luts->offsets.emplace_back(luts->totalBufferSize);
luts->totalBufferSize += entries[i]->buffer.data.size();
luts->entries.emplace_back(entries[i]);
luts->entries.back()->incStrong((void*)ADisplayLuts_setEntries);
}
}
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