path: root/libavcodec/jni.c (plain)
blob: 85dcf2abafd9a0530bf44847de444b2a079fbd1a

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;
38	pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
39
40	int av_jni_set_java_vm(void *vm, void *log_ctx)
41	{
42	int ret = 0;
43
44	pthread_mutex_lock(&lock);
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	}
51	pthread_mutex_unlock(&lock);
52
53	return ret;
54	}
55
56	void *av_jni_get_java_vm(void *log_ctx)
57	{
58	void *vm;
59
60	pthread_mutex_lock(&lock);
61	vm = java_vm;
62	pthread_mutex_unlock(&lock);
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
80