FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
jni.c
Go to the documentation of this file.
1 /*
2  * JNI public API functions
3  *
4  * Copyright (c) 2015-2016 Matthieu Bouron <matthieu.bouron stupeflix.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include <stdlib.h>
24 
25 #include "config.h"
26 #include "jni.h"
27 
28 #if CONFIG_JNI
29 
30 #include <errno.h>
31 #include <jni.h>
32 #include <pthread.h>
33 
34 #include "libavutil/log.h"
35 #include "libavutil/error.h"
36 #include "ffjni.h"
37 
38 void *java_vm;
39 pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
40 
41 int av_jni_set_java_vm(void *vm, void *log_ctx)
42 {
43  int ret = 0;
44 
46  if (java_vm == NULL) {
47  java_vm = vm;
48  } else if (java_vm != vm) {
49  ret = AVERROR(EINVAL);
50  av_log(log_ctx, AV_LOG_ERROR, "A Java virtual machine has already been set");
51  }
53 
54  return ret;
55 }
56 
57 void *av_jni_get_java_vm(void *log_ctx)
58 {
59  void *vm;
60 
62  vm = java_vm;
64 
65  return vm;
66 }
67 
68 #else
69 
70 int av_jni_set_java_vm(void *vm, void *log_ctx)
71 {
72  return 0;
73 }
74 
75 void *av_jni_get_java_vm(void *log_ctx)
76 {
77  return NULL;
78 }
79 
80 #endif
#define NULL
Definition: coverity.c:32
int av_jni_set_java_vm(void *vm, void *log_ctx)
Definition: jni.c:70
HMTX pthread_mutex_t
Definition: os2threads.h:49
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
error code definitions
#define AVERROR(e)
Definition: error.h:43
void * av_jni_get_java_vm(void *log_ctx)
Definition: jni.c:75
static JavaVM * java_vm
Definition: ffjni.c:34
static pthread_mutex_t lock
Definition: ffjni.c:35
static av_always_inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
Definition: os2threads.h:120
static av_always_inline int pthread_mutex_lock(pthread_mutex_t *mutex)
Definition: os2threads.h:113