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/*
* Copyright 2019 Google LLC
*
* 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
*
* https://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.
*/
#include <jni.h>
#include <cassert>
#include <string>
#include <functional>
#include <utility>
#include <vector>
#include "DuplexEngine.h"
#include "effects/Effects.h"
#include "FunctionList.h"
// JNI Utility functions and globals
static DuplexEngine *enginePtr = nullptr;
// Actual JNI interface
extern "C" {
JNIEXPORT void JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_createAudioEngine(
JNIEnv,
jobject /* this */) {
enginePtr = new DuplexEngine();
}
JNIEXPORT void JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_destroyAudioEngine(
JNIEnv,
jobject /* this */) {
if (!enginePtr) return;
delete enginePtr;
enginePtr = nullptr;
}
JNIEXPORT jobjectArray JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_getEffects(JNIEnv *env, jobject) {
jclass jcl = env->FindClass("com/mobileer/androidfxlab/datatype/EffectDescription");
jclass jparamcl = env->FindClass("com/mobileer/androidfxlab/datatype/ParamDescription");
assert (jcl != nullptr && jparamcl != nullptr);
auto jparamMethodId = env->GetMethodID(jparamcl, "<init>", "(Ljava/lang/String;FFF)V");
auto jMethodId = env->GetMethodID(jcl, "<init>",
"(Ljava/lang/String;Ljava/lang/String;I[Lcom/mobileer/androidfxlab/datatype/ParamDescription;)V");
auto arr = env->NewObjectArray(numEffects, jcl, nullptr);
auto lambda = [&](auto &arg, int i) {
const auto ¶mArr = arg.getParams();
auto jparamArr = env->NewObjectArray(paramArr.size(), jparamcl, nullptr);
int c = 0;
for (auto const &elem: paramArr) {
jobject j = env->NewObject(jparamcl, jparamMethodId,
env->NewStringUTF(std::string(elem.kName).c_str()),
elem.kMinVal, elem.kMaxVal, elem.kDefVal);
assert(j != nullptr);
env->SetObjectArrayElement(jparamArr, c++, j);
}
jobject j = env->NewObject(jcl, jMethodId,
env->NewStringUTF(std::string(arg.getName()).c_str()),
env->NewStringUTF(std::string(arg.getCategory()).c_str()),
i, jparamArr);
assert(j != nullptr);
env->SetObjectArrayElement(arr, i, j);
};
int i = 0;
std::apply([&i, &lambda](auto &&... args) mutable { ((lambda(args, i++)), ...); },
EffectsTuple);
return arr;
}
JNIEXPORT void JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_addDefaultEffectNative(JNIEnv *, jobject, jint jid) {
if (!enginePtr) return;
auto id = static_cast<int>(jid);
std::visit([id](auto &&stack) {
std::function<void(decltype(stack.getType()), decltype(stack.getType()))> f;
int i = 0;
std::apply([id, &f, &i](auto &&... args) mutable {
((f = (i++ == id) ?
args.template buildDefaultEffect<decltype(stack.getType())>() : f), ...);
}, EffectsTuple);
stack.addEffect(std::move(f));
}, enginePtr->functionList);
}
JNIEXPORT void JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_removeEffectNative(JNIEnv *, jobject, jint jind) {
if (!enginePtr) return;
auto ind = static_cast<size_t>(jind);
std::visit([ind](auto &&arg) {
arg.removeEffectAt(ind);
}, enginePtr->functionList);
}
JNIEXPORT void JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_rotateEffectNative(JNIEnv *, jobject,
jint jfrom, jint jto) {
if (!enginePtr) return;
auto from = static_cast<size_t>(jfrom);
auto to = static_cast<size_t>(jto);
std::visit([from, to](auto &&arg) {
arg.rotateEffectAt(from, to);
}, enginePtr->functionList);
}
JNIEXPORT void JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_modifyEffectNative(
JNIEnv *env, jobject, jint jid, jint jindex, jfloatArray params) {
if (!enginePtr) return;
int id = static_cast<int>(jid);
int index = static_cast<size_t>(jindex);
jfloat *data = env->GetFloatArrayElements(params, nullptr);
std::vector<float> arr{data, data + env->GetArrayLength(params)};
env->ReleaseFloatArrayElements(params, data, 0);
std::visit([&arr, &id, &index](auto &&stack) {
std::function<void(decltype(stack.getType()), decltype(stack.getType()))> ef;
int i = 0;
std::apply([&](auto &&... args) mutable {
((ef = (i++ == id) ?
args.modifyEffectVec(ef, arr) : ef), ...);
}, EffectsTuple);
stack.modifyEffectAt(index, std::move(ef));
}, enginePtr->functionList);
}
JNIEXPORT void JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_enableEffectNative(
JNIEnv *, jobject, jint jindex, jboolean jenable) {
if (!enginePtr) return;
auto ind = static_cast<size_t>(jindex);
auto enable = static_cast<bool>(jenable);
std::visit([ind, enable](auto &&args) {
args.enableEffectAt(ind, enable);
}, enginePtr->functionList);
}
JNIEXPORT void JNICALL
Java_com_mobileer_androidfxlab_NativeInterface_enablePassthroughNative(
JNIEnv *, jobject, jboolean jenable) {
if (!enginePtr) return;
std::visit([enable = static_cast<bool>(jenable)](auto &&args) {
args.mute(!enable);
}, enginePtr->functionList);
}
} //extern C
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