gstreamer/gst-libs/gst/dvm/gstdvm.h
2016-01-21 13:49:16 -05:00

147 lines
7.8 KiB
C

/* Dalvik Virtual Machine helper functions
*
* Copyright (C) 2012, Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
* Copyright (C) 2012, Cisco Systems, Inc.
* Author: Youness Alaoui <youness.alaoui@collabora.co.uk>
*
* This library 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
* version 2.1 of the License.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef __GST_DVM_H__
#define __GST_DVM_H__
#include <gst/gst.h>
#include <jni.h>
#define GST_DVM_GET_CLASS(k, name) { \
jclass tmp; \
\
tmp = (*env)->FindClass (env, name); \
if (!tmp) { \
(*env)->ExceptionClear (env); \
GST_ERROR ("Failed to get class %s", name); \
return FALSE; \
} \
\
k.klass = (*env)->NewGlobalRef (env, tmp); \
if (!k.klass) { \
(*env)->ExceptionClear (env); \
(*env)->DeleteLocalRef (env, tmp); \
GST_ERROR ("Failed to get %s class global reference", name); \
return FALSE; \
} \
(*env)->DeleteLocalRef (env, tmp); \
}
#define GST_DVM_GET_STATIC_METHOD(k, method, signature) \
k.method = (*env)->GetStaticMethodID (env, k.klass, #method, \
signature); \
if (!k.method) { \
(*env)->ExceptionClear (env); \
GST_ERROR ("Failed to get static method %s for %s", #method, #k); \
return FALSE; \
}
#define GST_DVM_GET_METHOD(k, method, signature) \
k.method = (*env)->GetMethodID (env, k.klass, #method, signature); \
if (!k.method) { \
(*env)->ExceptionClear (env); \
GST_ERROR ("Failed to get method %s for %s", #method, #k); \
return FALSE; \
}
#define GST_DVM_GET_CONSTRUCTOR(k, field, signature) \
k.field = (*env)->GetMethodID (env, k.klass, "<init>", signature); \
if (!k.field) { \
(*env)->ExceptionClear (env); \
GST_ERROR ("Failed to get constructor %s for %s", #field, #k); \
return FALSE; \
}
#define GST_DVM_GET_STATIC_FIELD(k, field, signature) \
k.field = (*env)->GetStaticFieldID (env, k.klass, #field, signature); \
if (!k.field) { \
(*env)->ExceptionClear (env); \
GST_ERROR ("Failed to get static field %s for %s", #field, #k); \
return FALSE; \
}
#define GST_DVM_GET_FIELD(k, field, signature) \
k.field = (*env)->GetFieldID (env, k.klass, #field, signature); \
if (!k.field) { \
(*env)->ExceptionClear (env); \
GST_ERROR ("Failed to get field %s for %s", #field, #k); \
return FALSE; \
}
#define GST_DVM_GET_CONSTANT(k, field, type, signature) { \
jfieldID id; \
\
id = (*env)->GetStaticFieldID (env, k.klass, #field, signature); \
if (!id) { \
(*env)->ExceptionClear (env); \
GST_ERROR ("Failed to get static field %s for %s", #field, #k); \
return FALSE; \
} \
k.field = (*env)->GetStatic##type##Field (env, k.klass, id); \
if ((*env)->ExceptionCheck (env)) { \
(*env)->ExceptionClear (env); \
GST_ERROR ("Failed to get " #type " constant %s", #field); \
return FALSE; \
} \
}
#define GST_DVM_STATIC_CALL(error_statement, type, k, method, ...) \
(*env)->CallStatic##type##Method (env, k.klass, k.method, ## __VA_ARGS__); \
if ((*env)->ExceptionCheck (env)) { \
GST_ERROR ("Failed to call Java method"); \
(*env)->ExceptionDescribe (env); \
(*env)->ExceptionClear (env); \
error_statement; \
}
#define GST_DVM_CALL(error_statement, obj, type, k, method, ...) \
(*env)->Call##type##Method (env, obj, k.method, ## __VA_ARGS__); \
if ((*env)->ExceptionCheck (env)) { \
GST_ERROR ("Failed to call Java method"); \
(*env)->ExceptionDescribe (env); \
(*env)->ExceptionClear (env); \
error_statement; \
}
#define GST_DVM_FIELD(error_statement, obj, type, k, field) \
(*env)->Get##type##Field (env, obj, k.field); \
if ((*env)->ExceptionCheck (env)) { \
GST_ERROR ("Failed to get Java field"); \
(*env)->ExceptionDescribe (env); \
(*env)->ExceptionClear (env); \
error_statement; \
}
#define GST_DVM_STATIC_FIELD(error_statement, type, k, field) \
(*env)->GetStatic##type##Field (env, k.klass, k.field); \
if ((*env)->ExceptionCheck (env)) { \
GST_ERROR ("Failed to get Java static field"); \
(*env)->ExceptionDescribe (env); \
(*env)->ExceptionClear (env); \
error_statement; \
}
JNIEnv *gst_dvm_get_env (void);
gboolean gst_dvm_init (void);
gboolean gst_dvm_is_own_vm (void);
#endif /* __GST_DVM_H__ */