FFmpeg/libavcodec/mediacodec_surface.c
Matthieu Bouron 376d8fb2c5 lavc/ffjni: replace ff_jni_{attach,detach} with ff_jni_get_env
If a JNI environment is not already attached to the thread where the
MediaCodec calls are made the current implementation will attach /
detach an environment for each MediaCodec call wasting some CPU time.

ff_jni_get_env replaces ff_jni_{attach,detach} by permanently attaching
an environment (if it is not already the case) to the current thread.
The environment will be automatically detached at the thread destruction
using a pthread_key callback.

Saves around 5% of CPU time (out of 20%) while decoding a stream with
MediaCodec.
2016-07-27 15:43:39 +02:00

57 lines
1.4 KiB
C

/*
* Android MediaCodec Surface functions
*
* Copyright (c) 2016 Matthieu Bouron <matthieu.bouron stupeflix.com>
*
* This file is part of FFmpeg.
*
* FFmpeg 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <jni.h>
#include "ffjni.h"
#include "mediacodec_surface.h"
void *ff_mediacodec_surface_ref(void *surface, void *log_ctx)
{
JNIEnv *env = NULL;
void *reference = NULL;
env = ff_jni_get_env(log_ctx);
if (!env) {
return NULL;
}
reference = (*env)->NewGlobalRef(env, surface);
return reference;
}
int ff_mediacodec_surface_unref(void *surface, void *log_ctx)
{
JNIEnv *env = NULL;
env = ff_jni_get_env(log_ctx);
if (!env) {
return AVERROR_EXTERNAL;
}
(*env)->DeleteGlobalRef(env, surface);
return 0;
}