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modules/media/src/main/native/jfxmedia/jni/JavaBandsHolder.cpp

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rev 9506 : 8156563: JavaFX Ensemble8 media sample hang and crash
Reviewed-by: almatvee, kcr
   1 /*
   2  * Copyright (c) 2010, 2013, 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


  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 
  47         if (m_Phases)
  48             pEnv->DeleteGlobalRef(m_Phases);


  49     }
  50 }
  51 
  52 void CJavaBandsHolder::UpdateBands(int size, const float* magnitudes, const float* phases)
  53 {
  54     if (m_Bands != size)
  55         return;
  56 
  57     CJavaEnvironment jenv(m_jvm);
  58     JNIEnv *pEnv = jenv.getEnvironment();
  59     if (pEnv) {
  60         pEnv->SetFloatArrayRegion(m_Magnitudes, 0, size, magnitudes);
  61         pEnv->SetFloatArrayRegion(m_Phases, 0, size, phases);









  62     }
  63 }
   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


  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 }
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