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329 lines
12 KiB
C++
329 lines
12 KiB
C++
//
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// JSITypedArray.cpp
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// VisionCamera
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//
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// Created by Marc Rousavy on 21.02.23.
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// Copyright © 2023 mrousavy. All rights reserved.
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//
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// Copied & Adapted from
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// https://github.com/expo/expo/blob/main/packages/expo-gl/common/EXTypedArrayApi.cpp Credits to
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// Expo
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#include "JSITypedArray.h"
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#include <algorithm>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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namespace vision {
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template <TypedArrayKind T> using ContentType = typename typedArrayTypeMap<T>::type;
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enum class Prop {
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Buffer, // "buffer"
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Constructor, // "constructor"
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Name, // "name"
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Proto, // "__proto__"
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Length, // "length"
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ByteLength, // "byteLength"
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ByteOffset, // "offset"
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IsView, // "isView"
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ArrayBuffer, // "ArrayBuffer"
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Int8Array, // "Int8Array"
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Int16Array, // "Int16Array"
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Int32Array, // "Int32Array"
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Uint8Array, // "Uint8Array"
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Uint8ClampedArray, // "Uint8ClampedArray"
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Uint16Array, // "Uint16Array"
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Uint32Array, // "Uint32Array"
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Float32Array, // "Float32Array"
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Float64Array, // "Float64Array"
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};
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class PropNameIDCache {
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public:
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const jsi::PropNameID& get(jsi::Runtime& runtime, Prop prop) {
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auto key = reinterpret_cast<uintptr_t>(&runtime);
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if (this->props.find(key) == this->props.end()) {
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this->props[key] = std::unordered_map<Prop, std::unique_ptr<jsi::PropNameID>>();
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}
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if (!this->props[key][prop]) {
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this->props[key][prop] = std::make_unique<jsi::PropNameID>(createProp(runtime, prop));
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}
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return *(this->props[key][prop]);
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}
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const jsi::PropNameID& getConstructorNameProp(jsi::Runtime& runtime, TypedArrayKind kind);
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void invalidate(uintptr_t key) {
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if (props.find(key) != props.end()) {
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props[key].clear();
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}
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}
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private:
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std::unordered_map<uintptr_t, std::unordered_map<Prop, std::unique_ptr<jsi::PropNameID>>> props;
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jsi::PropNameID createProp(jsi::Runtime& runtime, Prop prop);
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};
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PropNameIDCache propNameIDCache;
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void invalidateArrayBufferCache(jsi::Runtime& runtime) {
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auto key = reinterpret_cast<uintptr_t>(&runtime);
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propNameIDCache.invalidate(key);
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}
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TypedArrayKind getTypedArrayKindForName(const std::string& name);
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TypedArrayBase::TypedArrayBase(jsi::Runtime& runtime, size_t size, TypedArrayKind kind)
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: TypedArrayBase(
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runtime, runtime.global()
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.getProperty(runtime, propNameIDCache.getConstructorNameProp(runtime, kind))
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.asObject(runtime)
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.asFunction(runtime)
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.callAsConstructor(runtime, {static_cast<double>(size)})
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.asObject(runtime)) {}
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TypedArrayBase::TypedArrayBase(jsi::Runtime& runtime, const jsi::Object& obj)
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: jsi::Object(jsi::Value(runtime, obj).asObject(runtime)) {}
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TypedArrayKind TypedArrayBase::getKind(jsi::Runtime& runtime) const {
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auto constructorName = this->getProperty(runtime, propNameIDCache.get(runtime, Prop::Constructor))
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.asObject(runtime)
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.getProperty(runtime, propNameIDCache.get(runtime, Prop::Name))
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.asString(runtime)
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.utf8(runtime);
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return getTypedArrayKindForName(constructorName);
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}
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size_t TypedArrayBase::size(jsi::Runtime& runtime) const {
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return getProperty(runtime, propNameIDCache.get(runtime, Prop::Length)).asNumber();
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}
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size_t TypedArrayBase::length(jsi::Runtime& runtime) const {
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return getProperty(runtime, propNameIDCache.get(runtime, Prop::Length)).asNumber();
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}
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size_t TypedArrayBase::byteLength(jsi::Runtime& runtime) const {
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return getProperty(runtime, propNameIDCache.get(runtime, Prop::ByteLength)).asNumber();
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}
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size_t TypedArrayBase::byteOffset(jsi::Runtime& runtime) const {
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return getProperty(runtime, propNameIDCache.get(runtime, Prop::ByteOffset)).asNumber();
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}
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bool TypedArrayBase::hasBuffer(jsi::Runtime& runtime) const {
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auto buffer = getProperty(runtime, propNameIDCache.get(runtime, Prop::Buffer));
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return buffer.isObject() && buffer.asObject(runtime).isArrayBuffer(runtime);
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}
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std::vector<uint8_t> TypedArrayBase::toVector(jsi::Runtime& runtime) {
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auto start = reinterpret_cast<uint8_t*>(getBuffer(runtime).data(runtime) + byteOffset(runtime));
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auto end = start + byteLength(runtime);
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return std::vector<uint8_t>(start, end);
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}
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jsi::ArrayBuffer TypedArrayBase::getBuffer(jsi::Runtime& runtime) const {
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auto buffer = getProperty(runtime, propNameIDCache.get(runtime, Prop::Buffer));
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if (buffer.isObject() && buffer.asObject(runtime).isArrayBuffer(runtime)) {
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return buffer.asObject(runtime).getArrayBuffer(runtime);
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} else {
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throw std::runtime_error("no ArrayBuffer attached");
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}
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}
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bool isTypedArray(jsi::Runtime& runtime, const jsi::Object& jsObj) {
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auto jsVal = runtime.global()
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.getProperty(runtime, propNameIDCache.get(runtime, Prop::ArrayBuffer))
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.asObject(runtime)
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.getProperty(runtime, propNameIDCache.get(runtime, Prop::IsView))
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.asObject(runtime)
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.asFunction(runtime)
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.callWithThis(runtime, runtime.global(), {jsi::Value(runtime, jsObj)});
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if (jsVal.isBool()) {
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return jsVal.getBool();
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} else {
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throw std::runtime_error("value is not a boolean");
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}
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}
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TypedArrayBase getTypedArray(jsi::Runtime& runtime, const jsi::Object& jsObj) {
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auto jsVal = runtime.global()
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.getProperty(runtime, propNameIDCache.get(runtime, Prop::ArrayBuffer))
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.asObject(runtime)
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.getProperty(runtime, propNameIDCache.get(runtime, Prop::IsView))
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.asObject(runtime)
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.asFunction(runtime)
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.callWithThis(runtime, runtime.global(), {jsi::Value(runtime, jsObj)});
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if (jsVal.isBool()) {
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return TypedArrayBase(runtime, jsObj);
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} else {
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throw std::runtime_error("value is not a boolean");
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}
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}
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std::vector<uint8_t> arrayBufferToVector(jsi::Runtime& runtime, jsi::Object& jsObj) {
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if (!jsObj.isArrayBuffer(runtime)) {
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throw std::runtime_error("Object is not an ArrayBuffer");
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}
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auto jsArrayBuffer = jsObj.getArrayBuffer(runtime);
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uint8_t* dataBlock = jsArrayBuffer.data(runtime);
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size_t blockSize =
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jsArrayBuffer.getProperty(runtime, propNameIDCache.get(runtime, Prop::ByteLength)).asNumber();
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return std::vector<uint8_t>(dataBlock, dataBlock + blockSize);
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}
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void arrayBufferUpdate(jsi::Runtime& runtime, jsi::ArrayBuffer& buffer, std::vector<uint8_t> data,
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size_t offset) {
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uint8_t* dataBlock = buffer.data(runtime);
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size_t blockSize = buffer.size(runtime);
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if (data.size() > blockSize) {
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throw jsi::JSError(runtime, "ArrayBuffer is to small to fit data");
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}
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std::copy(data.begin(), data.end(), dataBlock + offset);
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}
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template <TypedArrayKind T>
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TypedArray<T>::TypedArray(jsi::Runtime& runtime, size_t size) : TypedArrayBase(runtime, size, T) {}
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template <TypedArrayKind T>
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TypedArray<T>::TypedArray(jsi::Runtime& runtime, std::vector<ContentType<T>> data)
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: TypedArrayBase(runtime, data.size(), T) {
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update(runtime, data);
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}
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template <TypedArrayKind T>
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TypedArray<T>::TypedArray(TypedArrayBase&& base) : TypedArrayBase(std::move(base)) {}
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template <TypedArrayKind T>
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std::vector<ContentType<T>> TypedArray<T>::toVector(jsi::Runtime& runtime) {
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auto start =
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reinterpret_cast<ContentType<T>*>(getBuffer(runtime).data(runtime) + byteOffset(runtime));
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auto end = start + size(runtime);
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return std::vector<ContentType<T>>(start, end);
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}
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template <TypedArrayKind T>
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void TypedArray<T>::update(jsi::Runtime& runtime, const std::vector<ContentType<T>>& data) {
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if (data.size() != size(runtime)) {
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throw jsi::JSError(runtime, "TypedArray can only be updated with a vector of the same size");
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}
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uint8_t* rawData = getBuffer(runtime).data(runtime) + byteOffset(runtime);
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std::copy(data.begin(), data.end(), reinterpret_cast<ContentType<T>*>(rawData));
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}
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template <TypedArrayKind T>
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void TypedArray<T>::updateUnsafe(jsi::Runtime& runtime, ContentType<T>* data, size_t length) {
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if (length != size(runtime)) {
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throw jsi::JSError(runtime, "TypedArray can only be updated with an array of the same size");
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}
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uint8_t* rawData = getBuffer(runtime).data(runtime) + byteOffset(runtime);
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memcpy(rawData, data, length);
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}
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template <TypedArrayKind T> uint8_t* TypedArray<T>::data(jsi::Runtime& runtime) {
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return getBuffer(runtime).data(runtime) + byteOffset(runtime);
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}
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const jsi::PropNameID& PropNameIDCache::getConstructorNameProp(jsi::Runtime& runtime,
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TypedArrayKind kind) {
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switch (kind) {
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case TypedArrayKind::Int8Array:
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return get(runtime, Prop::Int8Array);
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case TypedArrayKind::Int16Array:
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return get(runtime, Prop::Int16Array);
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case TypedArrayKind::Int32Array:
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return get(runtime, Prop::Int32Array);
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case TypedArrayKind::Uint8Array:
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return get(runtime, Prop::Uint8Array);
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case TypedArrayKind::Uint8ClampedArray:
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return get(runtime, Prop::Uint8ClampedArray);
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case TypedArrayKind::Uint16Array:
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return get(runtime, Prop::Uint16Array);
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case TypedArrayKind::Uint32Array:
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return get(runtime, Prop::Uint32Array);
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case TypedArrayKind::Float32Array:
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return get(runtime, Prop::Float32Array);
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case TypedArrayKind::Float64Array:
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return get(runtime, Prop::Float64Array);
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}
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}
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jsi::PropNameID PropNameIDCache::createProp(jsi::Runtime& runtime, Prop prop) {
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auto create = [&](const std::string& propName) {
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return jsi::PropNameID::forUtf8(runtime, propName);
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};
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switch (prop) {
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case Prop::Buffer:
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return create("buffer");
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case Prop::Constructor:
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return create("constructor");
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case Prop::Name:
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return create("name");
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case Prop::Proto:
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return create("__proto__");
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case Prop::Length:
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return create("length");
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case Prop::ByteLength:
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return create("byteLength");
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case Prop::ByteOffset:
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return create("byteOffset");
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case Prop::IsView:
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return create("isView");
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case Prop::ArrayBuffer:
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return create("ArrayBuffer");
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case Prop::Int8Array:
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return create("Int8Array");
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case Prop::Int16Array:
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return create("Int16Array");
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case Prop::Int32Array:
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return create("Int32Array");
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case Prop::Uint8Array:
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return create("Uint8Array");
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case Prop::Uint8ClampedArray:
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return create("Uint8ClampedArray");
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case Prop::Uint16Array:
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return create("Uint16Array");
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case Prop::Uint32Array:
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return create("Uint32Array");
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case Prop::Float32Array:
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return create("Float32Array");
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case Prop::Float64Array:
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return create("Float64Array");
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}
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}
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std::unordered_map<std::string, TypedArrayKind> nameToKindMap = {
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{"Int8Array", TypedArrayKind::Int8Array},
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{"Int16Array", TypedArrayKind::Int16Array},
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{"Int32Array", TypedArrayKind::Int32Array},
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{"Uint8Array", TypedArrayKind::Uint8Array},
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{"Uint8ClampedArray", TypedArrayKind::Uint8ClampedArray},
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{"Uint16Array", TypedArrayKind::Uint16Array},
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{"Uint32Array", TypedArrayKind::Uint32Array},
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{"Float32Array", TypedArrayKind::Float32Array},
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{"Float64Array", TypedArrayKind::Float64Array},
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};
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TypedArrayKind getTypedArrayKindForName(const std::string& name) {
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return nameToKindMap.at(name);
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}
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template class TypedArray<TypedArrayKind::Int8Array>;
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template class TypedArray<TypedArrayKind::Int16Array>;
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template class TypedArray<TypedArrayKind::Int32Array>;
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template class TypedArray<TypedArrayKind::Uint8Array>;
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template class TypedArray<TypedArrayKind::Uint8ClampedArray>;
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template class TypedArray<TypedArrayKind::Uint16Array>;
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template class TypedArray<TypedArrayKind::Uint32Array>;
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template class TypedArray<TypedArrayKind::Float32Array>;
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template class TypedArray<TypedArrayKind::Float64Array>;
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} // namespace vision
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