1 /* 2 * Copyright (c) 2010, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "JavaBandsHolder.h" 27 #include "JniUtils.h" 28 29 CJavaBandsHolder::CJavaBandsHolder(JNIEnv* env, int bands, jfloatArray magnitudes, jfloatArray phases) 30 : m_Bands(bands) 31 { 32 env->GetJavaVM(&m_jvm); 33 m_Magnitudes = (jfloatArray)env->NewGlobalRef(magnitudes); 34 m_Phases = (jfloatArray)env->NewGlobalRef(phases); 35 InitRef(this); 36 } 37 38 CJavaBandsHolder::~CJavaBandsHolder() 39 { 40 CJavaEnvironment jenv(m_jvm); 41 JNIEnv *pEnv = jenv.getEnvironment(); 42 43 if (pEnv) { 44 if (m_Magnitudes) { 45 pEnv->DeleteGlobalRef(m_Magnitudes); 46 m_Magnitudes = NULL; 47 } 48 49 if (m_Phases) { 50 pEnv->DeleteGlobalRef(m_Phases); 51 m_Phases = NULL; 52 } 53 } 54 } 55 56 void CJavaBandsHolder::UpdateBands(int size, const float* magnitudes, const float* phases) 57 { 58 if (m_Bands != size) 59 return; 60 61 CJavaEnvironment jenv(m_jvm); 62 JNIEnv *pEnv = jenv.getEnvironment(); 63 if (pEnv) { 64 // use local references due to threading issues 65 jfloatArray localMagnitudes = (jfloatArray)pEnv->NewLocalRef(m_Magnitudes); 66 jfloatArray localPhases = (jfloatArray)pEnv->NewLocalRef(m_Phases); 67 68 if (localMagnitudes && localPhases) { 69 pEnv->SetFloatArrayRegion(localMagnitudes, 0, size, magnitudes); 70 pEnv->SetFloatArrayRegion(localPhases, 0, size, phases); 71 } 72 73 pEnv->DeleteLocalRef(localMagnitudes); 74 pEnv->DeleteLocalRef(localPhases); 75 } 76 }