mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/*
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* Copyright (C) 2012, Collabora Ltd.
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* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
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*
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* This library 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
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* version 2.1 of the License.
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*
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* This library 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 this library; 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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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstamc.h"
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#include <gst/gst.h>
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#include <string.h>
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#include <jni.h>
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GST_DEBUG_CATEGORY (gst_amc_debug);
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#define GST_CAT_DEFAULT gst_amc_debug
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static GModule *java_module;
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static jint (*get_created_java_vms) (JavaVM ** vmBuf, jsize bufLen,
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jsize * nVMs);
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static jint (*create_java_vm) (JavaVM ** p_vm, JNIEnv ** p_env, void *vm_args);
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static JavaVM *java_vm;
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JNIEnv *
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gst_amc_attach_current_thread (void)
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{
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JNIEnv *env;
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JavaVMAttachArgs args;
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args.version = JNI_VERSION_1_6;
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args.name = NULL;
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args.group = NULL;
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if ((*java_vm)->AttachCurrentThread (java_vm, (void **) &env, &args) < 0) {
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GST_ERROR ("Failed to attach current thread");
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return NULL;
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}
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return env;
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}
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void
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gst_amc_detach_current_thread (void)
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{
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(*java_vm)->DetachCurrentThread (java_vm);
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}
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static gboolean
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initialize_java_vm (void)
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{
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jsize n_vms;
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java_module = g_module_open ("libdvm", G_MODULE_BIND_LOCAL);
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if (!java_module)
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goto load_failed;
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if (!g_module_symbol (java_module, "JNI_CreateJavaVM",
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(gpointer *) & create_java_vm))
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goto symbol_error;
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if (!g_module_symbol (java_module, "JNI_GetCreatedJavaVMs",
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(gpointer *) & get_created_java_vms))
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goto symbol_error;
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n_vms = 0;
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if (get_created_java_vms (&java_vm, 1, &n_vms) < 0)
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goto get_created_failed;
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if (n_vms > 0) {
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GST_DEBUG ("Successfully got existing Java VM %p", java_vm);
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} else {
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JNIEnv *env;
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JavaVMInitArgs vm_args;
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JavaVMOption options[1];
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/* FIXME: Do we need any options here? Like exit()
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* handler, or classpaths? */
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vm_args.version = JNI_VERSION_1_6;
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vm_args.options = options;
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vm_args.nOptions = 0;
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vm_args.ignoreUnrecognized = JNI_TRUE;
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if (create_java_vm (&java_vm, &env, &vm_args) < 0)
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goto create_failed;
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GST_DEBUG ("Successfully created Java VM %p", java_vm);
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}
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return java_vm != NULL;
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load_failed:
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{
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GST_ERROR ("Failed to load libdvm: %s", g_module_error ());
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return FALSE;
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}
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symbol_error:
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{
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GST_ERROR ("Failed to locate required JNI symbols in libdvm: %s",
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g_module_error ());
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g_module_close (java_module);
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java_module = NULL;
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return FALSE;
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}
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get_created_failed:
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{
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GST_ERROR ("Failed to get already created VMs");
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g_module_close (java_module);
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java_module = NULL;
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return FALSE;
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}
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create_failed:
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{
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GST_ERROR ("Failed to create a Java VM");
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g_module_close (java_module);
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java_module = NULL;
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return FALSE;
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}
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (gst_amc_debug, "amc", 0, "android-media-codec");
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if (!initialize_java_vm ())
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return FALSE;
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return TRUE;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"androidmediacodec",
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"GStreamer Android MediaCodec Plug-ins",
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plugin_init,
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PACKAGE_VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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