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Add a bit of resilience at class initialization
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parent
2048b11b90
commit
c763636b97
2 changed files with 8 additions and 3 deletions
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@ -264,13 +264,18 @@ void gst_native_set_position (JNIEnv* env, jobject thiz, int milliseconds) {
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}
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}
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void gst_class_init (JNIEnv* env, jclass klass) {
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jboolean gst_class_init (JNIEnv* env, jclass klass) {
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custom_data_field_id = (*env)->GetFieldID (env, klass, "native_custom_data", "J");
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GST_DEBUG ("The FieldID for the native_custom_data field is %p", custom_data_field_id);
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set_message_method_id = (*env)->GetMethodID (env, klass, "setMessage", "(Ljava/lang/String;)V");
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GST_DEBUG ("The MethodID for the setMessage method is %p", set_message_method_id);
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set_current_position_method_id = (*env)->GetMethodID (env, klass, "setCurrentPosition", "(II)V");
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GST_DEBUG ("The MethodID for the setCurrentPosition method is %p", set_current_position_method_id);
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if (!custom_data_field_id || !set_message_method_id || !set_current_position_method_id) {
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GST_ERROR ("The calling class does not implement all necessary interface methods");
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return JNI_FALSE;
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}
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return JNI_TRUE;
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}
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void gst_native_surface_init (JNIEnv *env, jobject thiz, jobject surface) {
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@ -305,7 +310,7 @@ static JNINativeMethod native_methods[] = {
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{ "nativePlay", "()V", (void *) gst_native_play},
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{ "nativePause", "()V", (void *) gst_native_pause},
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{ "nativeSetPosition", "(I)V", (void*) gst_native_set_position},
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{ "classInit", "()V", (void *) gst_class_init},
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{ "classInit", "()Z", (void *) gst_class_init},
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{ "nativeSurfaceInit", "(Ljava/lang/Object;)V", (void *) gst_native_surface_init},
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{ "nativeSurfaceFinalize", "()V", (void *) gst_native_surface_finalize}
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};
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@ -37,7 +37,7 @@ public class Tutorial1 extends Activity implements SurfaceHolder.Callback, OnSee
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private native void nativePlay();
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private native void nativePause();
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private native void nativeSetPosition(int milliseconds);
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private static native void classInit();
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private static native boolean classInit();
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private native void nativeSurfaceInit(Object surface);
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private native void nativeSurfaceFinalize();
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private long native_custom_data;
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