FFmpeg  4.0
jni.c
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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 "config.h"
24 
25 #include <stdlib.h>
26 
27 #include "libavutil/error.h"
28 #include "jni.h"
29 
30 #if CONFIG_JNI
31 #include <jni.h>
32 #include <pthread.h>
33 
34 #include "libavutil/log.h"
35 #include "ffjni.h"
36 
37 void *java_vm;
39 
40 int av_jni_set_java_vm(void *vm, void *log_ctx)
41 {
42  int ret = 0;
43 
45  if (java_vm == NULL) {
46  java_vm = vm;
47  } else if (java_vm != vm) {
48  ret = AVERROR(EINVAL);
49  av_log(log_ctx, AV_LOG_ERROR, "A Java virtual machine has already been set");
50  }
52 
53  return ret;
54 }
55 
56 void *av_jni_get_java_vm(void *log_ctx)
57 {
58  void *vm;
59 
61  vm = java_vm;
63 
64  return vm;
65 }
66 
67 #else
68 
69 int av_jni_set_java_vm(void *vm, void *log_ctx)
70 {
71  return AVERROR(ENOSYS);
72 }
73 
74 void *av_jni_get_java_vm(void *log_ctx)
75 {
76  return NULL;
77 }
78 
79 #endif
#define NULL
Definition: coverity.c:32
int av_jni_set_java_vm(void *vm, void *log_ctx)
Definition: jni.c:69
#define pthread_mutex_lock(a)
Definition: ffprobe.c:61
#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:74
#define pthread_mutex_unlock(a)
Definition: ffprobe.c:65
#define PTHREAD_MUTEX_INITIALIZER
Definition: os2threads.h:52
static JavaVM * java_vm
Definition: ffjni.c:34
static pthread_mutex_t lock
Definition: ffjni.c:37
_fmutex pthread_mutex_t
Definition: os2threads.h:49