376d8fb2c5
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.
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* Android MediaCodec Surface functions
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*
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* Copyright (c) 2016 Matthieu Bouron <matthieu.bouron stupeflix.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <jni.h>
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#include "ffjni.h"
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#include "mediacodec_surface.h"
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void *ff_mediacodec_surface_ref(void *surface, void *log_ctx)
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{
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JNIEnv *env = NULL;
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void *reference = NULL;
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env = ff_jni_get_env(log_ctx);
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if (!env) {
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return NULL;
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}
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reference = (*env)->NewGlobalRef(env, surface);
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return reference;
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}
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int ff_mediacodec_surface_unref(void *surface, void *log_ctx)
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{
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JNIEnv *env = NULL;
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env = ff_jni_get_env(log_ctx);
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if (!env) {
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return AVERROR_EXTERNAL;
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}
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(*env)->DeleteGlobalRef(env, surface);
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return 0;
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}
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