[Android] jni: fix potential leak

[Thomas Guillem]

vlc-ports/android | branch: master | Thomas Guillem <thomas at gllm.fr> | Fri Nov 14 17:10:21 2014 +0100| [2e07a5dab256cf0445bbdac2b601d7cafbd8bdc9] | committer: Jean-Baptiste Kempf

jni: fix potential leak

Signed-off-by: Jean-Baptiste Kempf <jb at videolan.org>

> http://git.videolan.org/gitweb.cgi/vlc-ports/android.git/?a=commit;h=2e07a5dab256cf0445bbdac2b601d7cafbd8bdc9
---

 libvlc/jni/vout.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libvlc/jni/vout.c b/libvlc/jni/vout.c
index 5481f08..1286fe1 100644
--- a/libvlc/jni/vout.c
+++ b/libvlc/jni/vout.c
@@ -135,6 +135,10 @@ void Java_org_videolan_libvlc_LibVLC_attachSurface(JNIEnv *env, jobject thiz, jo
         vout_android_surf = (void*)(*env)->GetIntField(env, surf, fid);
         (*env)->DeleteLocalRef(env, clz);
     }
+    if (vout_android_gui != NULL)
+        (*env)->DeleteGlobalRef(env, vout_android_gui);
+    if (vout_android_java_surf != NULL)
+        (*env)->DeleteGlobalRef(env, vout_android_java_surf);
     vout_android_gui = (*env)->NewGlobalRef(env, gui);
     vout_android_java_surf = (*env)->NewGlobalRef(env, surf);
     pthread_cond_signal(&vout_android_surf_attached);
@@ -155,6 +159,8 @@ void Java_org_videolan_libvlc_LibVLC_detachSurface(JNIEnv *env, jobject thiz) {
 
 void Java_org_videolan_libvlc_LibVLC_attachSubtitlesSurface(JNIEnv *env, jobject thiz, jobject surf) {
     pthread_mutex_lock(&vout_android_lock);
+    if (vout_android_subtitles_surf != NULL)
+        (*env)->DeleteGlobalRef(env, vout_android_subtitles_surf);
     vout_android_subtitles_surf = (*env)->NewGlobalRef(env, surf);
     pthread_cond_signal(&vout_android_surf_attached);
     pthread_mutex_unlock(&vout_android_lock);
@@ -162,7 +168,8 @@ void Java_org_videolan_libvlc_LibVLC_attachSubtitlesSurface(JNIEnv *env, jobject
 
 void Java_org_videolan_libvlc_LibVLC_detachSubtitlesSurface(JNIEnv *env, jobject thiz) {
     pthread_mutex_lock(&vout_android_lock);
-    (*env)->DeleteGlobalRef(env, vout_android_subtitles_surf);
+    if (vout_android_subtitles_surf != NULL)
+        (*env)->DeleteGlobalRef(env, vout_android_subtitles_surf);
     vout_android_subtitles_surf = NULL;
     pthread_mutex_unlock(&vout_android_lock);
 }