From e8c3c0382d58c8eabf4b96aa555683252c10d569 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Mon, 2 Oct 2023 20:30:38 +0200
Subject: Bug 1470 - FFmpeg / JNI: Perform exception check and rethrow for all
 Java Callbacks as recommended

---
 src/jogl/native/JoglCommon.c                 | 45 ++++++++++++++++++++++++----
 src/jogl/native/JoglCommon.h                 |  2 ++
 src/jogl/native/libav/ffmpeg_impl_template.c |  8 ++++-
 3 files changed, 48 insertions(+), 7 deletions(-)

(limited to 'src/jogl')

diff --git a/src/jogl/native/JoglCommon.c b/src/jogl/native/JoglCommon.c
index e9984ada2..cdd73c14f 100644
--- a/src/jogl/native/JoglCommon.c
+++ b/src/jogl/native/JoglCommon.c
@@ -46,24 +46,57 @@ void JoglCommon_FatalError(JNIEnv *env, const char* msg, ...)
     }
 }
 
-void JoglCommon_throwNewRuntimeException(JNIEnv *env, const char* msg, ...)
+static void JoglCommon_throwNewRuntimeExceptionVA(JNIEnv *env, const char* msg, va_list ap)
 {
     char buffer[512];
-    va_list ap;
 
     if(NULL==_jvmHandle) {
         JoglCommon_FatalError(env, "JOGL: NULL JVM handle, call JoglCommon_init 1st\n");
         return;
     }
 
+    vsnprintf(buffer, sizeof(buffer), msg, ap);
+
+    if(NULL != env) {
+        (*env)->ThrowNew(env, runtimeExceptionClz, buffer);
+    }
+}
+
+void JoglCommon_throwNewRuntimeException(JNIEnv *env, const char* msg, ...)
+{
+    va_list ap;
+
     if( NULL != msg ) {
         va_start(ap, msg);
-        vsnprintf(buffer, sizeof(buffer), msg, ap);
+        JoglCommon_throwNewRuntimeExceptionVA(env, msg, ap);
         va_end(ap);
+    }
+}
 
-        if(NULL != env) {
-            (*env)->ThrowNew(env, runtimeExceptionClz, buffer);
-        }
+jboolean JoglCommon_ExceptionCheck0(JNIEnv *env)
+{
+    if( (*env)->ExceptionCheck(env) ) {
+        (*env)->ExceptionDescribe(env);
+        (*env)->ExceptionClear(env);
+        return JNI_TRUE;
+    } else {
+        return JNI_FALSE;
+    }
+}
+
+jboolean JoglCommon_ExceptionCheck1_throwNewRuntimeException(JNIEnv *env, const char* msg, ...)
+{
+    va_list ap;
+
+    if( (*env)->ExceptionCheck(env) ) {
+        (*env)->ExceptionDescribe(env);
+        (*env)->ExceptionClear(env);
+        va_start(ap, msg);
+        JoglCommon_throwNewRuntimeExceptionVA(env, msg, ap);
+        va_end(ap);
+        return JNI_TRUE;
+    } else {
+        return JNI_FALSE;
     }
 }
 
diff --git a/src/jogl/native/JoglCommon.h b/src/jogl/native/JoglCommon.h
index 2aeaf7d1d..09d0051e4 100644
--- a/src/jogl/native/JoglCommon.h
+++ b/src/jogl/native/JoglCommon.h
@@ -38,6 +38,8 @@ jchar* JoglCommon_GetNullTerminatedStringChars(JNIEnv* env, jstring str);
 
 void JoglCommon_FatalError(JNIEnv *env, const char* msg, ...);
 void JoglCommon_throwNewRuntimeException(JNIEnv *env, const char* msg, ...);
+jboolean JoglCommon_ExceptionCheck0(JNIEnv *env);
+jboolean JoglCommon_ExceptionCheck1_throwNewRuntimeException(JNIEnv *env, const char* msg, ...);
 
 /**
  *
diff --git a/src/jogl/native/libav/ffmpeg_impl_template.c b/src/jogl/native/libav/ffmpeg_impl_template.c
index 57c3f9e65..385635fa3 100644
--- a/src/jogl/native/libav/ffmpeg_impl_template.c
+++ b/src/jogl/native/libav/ffmpeg_impl_template.c
@@ -334,7 +334,9 @@ JNIEXPORT jboolean JNICALL FF_FUNC(initSymbols0)
 }
 
 static int _isAudioFormatSupported(JNIEnv *env, jobject ffmpegMediaPlayer, enum AVSampleFormat aSampleFmt, int32_t aSampleRate, int32_t aChannels) {
-    return JNI_TRUE == (*env)->CallBooleanMethod(env, ffmpegMediaPlayer, ffmpeg_jni_mid_isAudioFormatSupported, aSampleFmt, aSampleRate, aChannels);
+    int res = JNI_TRUE == (*env)->CallBooleanMethod(env, ffmpegMediaPlayer, ffmpeg_jni_mid_isAudioFormatSupported, aSampleFmt, aSampleRate, aChannels);
+    JoglCommon_ExceptionCheck1_throwNewRuntimeException(env, "FFmpeg: Exception occured at isAudioFormatSupported(..)");
+    return res;
 }
 static void _updateJavaAttributes(JNIEnv *env, FFMPEGToolBasicAV_t* pAV) {
     if(NULL!=env) {
@@ -344,6 +346,7 @@ static void _updateJavaAttributes(JNIEnv *env, FFMPEGToolBasicAV_t* pAV) {
                                pAV->vTexWidth[0], pAV->vTexWidth[1], pAV->vTexWidth[2],
                                pAV->vWidth, pAV->vHeight,
                                pAV->aid, pAV->aSampleFmtOut, pAV->aSampleRateOut, pAV->aChannelsOut, pAV->aFrameSize);
+        JoglCommon_ExceptionCheck1_throwNewRuntimeException(env, "FFmpeg: Exception occured at setupFFAttributes(..)");
         (*env)->CallVoidMethod(env, pAV->ffmpegMediaPlayer, ffmpeg_jni_mid_updateAttributes,
                                pAV->vid, pAV->aid,
                                pAV->vWidth, pAV->vHeight,
@@ -351,11 +354,13 @@ static void _updateJavaAttributes(JNIEnv *env, FFMPEGToolBasicAV_t* pAV) {
                                pAV->fps, pAV->frames_video, pAV->frames_audio, pAV->duration,
                                (*env)->NewStringUTF(env, pAV->vcodec),
                                (*env)->NewStringUTF(env, pAV->acodec) );
+        JoglCommon_ExceptionCheck1_throwNewRuntimeException(env, "FFmpeg: Exception occured at updateAttributes(..)");
     }
 }
 static void _setIsGLOriented(JNIEnv *env, FFMPEGToolBasicAV_t* pAV) {
     if(NULL!=env) {
         (*env)->CallVoidMethod(env, pAV->ffmpegMediaPlayer, ffmpeg_jni_mid_setIsGLOriented, pAV->vFlipped);
+        JoglCommon_ExceptionCheck1_throwNewRuntimeException(env, "FFmpeg: Exception occured at setIsGLOriented(..)");
     }
 }
 
@@ -1363,6 +1368,7 @@ JNIEXPORT jint JNICALL FF_FUNC(readNextPacket0)
                         }
                     }
                     (*env)->CallVoidMethod(env, pAV->ffmpegMediaPlayer, ffmpeg_jni_mid_pushSound, pNIOBufferCurrent->nioRef, data_size, pAV->aPTS);
+                    JoglCommon_ExceptionCheck1_throwNewRuntimeException(env, "FFmpeg: Exception occured at pushSound(..)");
                 }
             }
         } else if(pAV->packet->stream_index==pAV->vid) {
-- 
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