1 files changed, 145 insertions, 0 deletions
diff --git a/libavcodec/ffjni.h b/libavcodec/ffjni.h
new file mode 100644
index 0000000000..6027bac0ab
--- /dev/null
+++ b/libavcodec/ffjni.h
@@ -0,0 +1,145 @@
+/*
+ * JNI utility functions
+ *
+ * Copyright (c) 2015-2016 Matthieu Bouron <matthieu.bouron stupeflix.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_FFJNI_H
+#define AVCODEC_FFJNI_H
+
+#include <jni.h>
+
+/*
+ * Attach permanently a JNI environment to the current thread and retrieve it.
+ *
+ * If successfully attached, the JNI environment will automatically be detached
+ * at thread destruction.
+ *
+ * @param attached pointer to an integer that will be set to 1 if the
+ * environment has been attached to the current thread or 0 if it is
+ * already attached.
+ * @param log_ctx context used for logging, can be NULL
+ * @return the JNI environment on success, NULL otherwise
+ */
+JNIEnv *ff_jni_get_env(void *log_ctx);
+
+/*
+ * Convert a jstring to its utf characters equivalent.
+ *
+ * @param env JNI environment
+ * @param string Java string to convert
+ * @param log_ctx context used for logging, can be NULL
+ * @return a pointer to an array of unicode characters on success, NULL
+ * otherwise
+ */
+char *ff_jni_jstring_to_utf_chars(JNIEnv *env, jstring string, void *log_ctx);
+
+/*
+ * Convert utf chars to its jstring equivalent.
+ *
+ * @param env JNI environment
+ * @param utf_chars a pointer to an array of unicode characters
+ * @param log_ctx context used for logging, can be NULL
+ * @return a Java string object on success, NULL otherwise
+ */
+jstring ff_jni_utf_chars_to_jstring(JNIEnv *env, const char *utf_chars, void *log_ctx);
+
+/*
+ * Extract the error summary from a jthrowable in the form of "className: errorMessage"
+ *
+ * @param env JNI environment
+ * @param exception exception to get the summary from
+ * @param error address pointing to the error, the value is updated if a
+ * summary can be extracted
+ * @param log_ctx context used for logging, can be NULL
+ * @return 0 on success, < 0 otherwise
+ */
+int ff_jni_exception_get_summary(JNIEnv *env, jthrowable exception, char **error, void *log_ctx);
+
+/*
+ * Check if an exception has occurred,log it using av_log and clear it.
+ *
+ * @param env JNI environment
+ * @param log value used to enable logging if an exception has occurred,
+ * 0 disables logging, != 0 enables logging
+ * @param log_ctx context used for logging, can be NULL
+ */
+int ff_jni_exception_check(JNIEnv *env, int log, void *log_ctx);
+
+/*
+ * Jni field type.
+ */
+enum FFJniFieldType {
+
+    FF_JNI_CLASS,
+    FF_JNI_FIELD,
+    FF_JNI_STATIC_FIELD,
+    FF_JNI_METHOD,
+    FF_JNI_STATIC_METHOD
+
+};
+
+/*
+ * Jni field describing a class, a field or a method to be retrieved using
+ * the ff_jni_init_jfields method.
+ */
+struct FFJniField {
+
+    const char *name;
+    const char *method;
+    const char *signature;
+    enum FFJniFieldType type;
+    int offset;
+    int mandatory;
+
+};
+
+/*
+ * Retrieve class references, field ids and method ids to an arbitrary structure.
+ *
+ * @param env JNI environment
+ * @param jfields a pointer to an arbitrary structure where the different
+ * fields are declared and where the FFJNIField mapping table offsets are
+ * pointing to
+ * @param jfields_mapping null terminated array of FFJNIFields describing
+ * the class/field/method to be retrieved
+ * @param global make the classes references global. It is the caller
+ * responsibility to properly release global references.
+ * @param log_ctx context used for logging, can be NULL
+ * @return 0 on success, < 0 otherwise
+ */
+int ff_jni_init_jfields(JNIEnv *env, void *jfields, const struct FFJniField *jfields_mapping, int global, void *log_ctx);
+
+/*
+ * Delete class references, field ids and method ids of an arbitrary structure.
+ *
+ * @param env JNI environment
+ * @param jfields a pointer to an arbitrary structure where the different
+ * fields are declared and where the FFJNIField mapping table offsets are
+ * pointing to
+ * @param jfields_mapping null terminated array of FFJNIFields describing
+ * the class/field/method to be deleted
+ * @param global threat the classes references as global and delete them
+ * accordingly
+ * @param log_ctx context used for logging, can be NULL
+ * @return 0 on success, < 0 otherwise
+ */
+int ff_jni_reset_jfields(JNIEnv *env, void *jfields, const struct FFJniField *jfields_mapping, int global, void *log_ctx);
+
+#endif /* AVCODEC_FFJNI_H */