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73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
2 years ago
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#include "TerminalDevice.h"
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#include <dlfcn.h>
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typedef jbyteArray (*TakePhotoFunc)(int, int, int, int);
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bool GetJniEnv(JavaVM *vm, JNIEnv **env)
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{
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bool did_attach_thread = false;
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*env = nullptr;
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// Check if the current thread is attached to the VM
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auto get_env_result = vm->GetEnv((void**)env, JNI_VERSION_1_6);
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if (get_env_result == JNI_EDETACHED)
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{
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if (vm->AttachCurrentThread(env, NULL) == JNI_OK) {
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did_attach_thread = true;
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} else {
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// Failed to attach thread. Throw an exception if you want to.
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}
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} else if (get_env_result == JNI_EVERSION)
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{
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// Unsupported JNI version. Throw an exception if you want to.
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}
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return did_attach_thread;
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}
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CTerminalDevice::CTerminalDevice(JavaVM* vm, jobject service)
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{
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m_vm = vm;
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JNIEnv* env = NULL;
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bool attached = GetJniEnv(m_vm, &env);
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m_javaService = env->NewGlobalRef(service);
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if (attached)
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{
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vm->DetachCurrentThread();
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}
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}
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CTerminalDevice::~CTerminalDevice()
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{
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JNIEnv* env = NULL;
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bool attached = GetJniEnv(m_vm, &env);
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env->DeleteGlobalRef(m_javaService);
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if (attached)
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{
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m_vm->DetachCurrentThread();
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}
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m_javaService = NULL;
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}
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bool CTerminalDevice::TakePhoto(unsigned char channel, unsigned char preset, const string& path, bool photo)
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{
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JNIEnv* env = NULL;
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bool attached = GetJniEnv(m_vm, &env);
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jclass serviceClass = env->GetObjectClass(m_javaService);
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jmethodID mid = env->GetMethodID(serviceClass, "takePhoto", "(SSLjava/lang/String;)Z");
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jstring str = env->NewStringUTF(path.c_str());
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jboolean res = env->CallBooleanMethod (m_javaService, mid, (jint)channel, (jint)preset, str);
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env->ReleaseStringUTFChars(str, path.c_str());
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env->DeleteLocalRef(serviceClass);
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if (!res)
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{
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int aa = 1;
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}
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if (attached)
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{
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m_vm->DetachCurrentThread();
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}
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return res == JNI_TRUE;
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}
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