mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-28 17:25:05 +00:00
Adding Dalvik Virtual Machine routines and macros
This commit is contained in:
Youness Alaoui
Nicolas Dufresne
parent
347dbf123d
commit
21f60289db
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@ -19,7 +19,8 @@ libgstandroidmedia_la_SOURCES = \
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video/video.c \
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video/gstvideodecoder.c \
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video/gstvideoencoder.c \
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video/gstvideoutils.c
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video/gstvideoutils.c \
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gst-dvm.c
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noinst_HEADERS = \
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gstamc.h \
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@ -29,7 +30,8 @@ noinst_HEADERS = \
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video/video.h \
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video/gstvideodecoder.h \
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video/gstvideoencoder.h \
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video/gstvideoutils.h
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video/gstvideoutils.h \
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gst-dvm.h
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if !HAVE_GST_0_10_37
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libgstandroidmedia_la_SOURCES += $(VIDEO_BASE_CLASSES_C)
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159
sys/androidcamera/gst-dvm.c
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159
sys/androidcamera/gst-dvm.c
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@ -0,0 +1,159 @@
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/*
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* Copyright (C) 2012, Collabora Ltd.
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* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
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* Copyright (C) 2012, Cisco Systems, Inc.
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* Author: Youness Alaoui <youness.alaoui@collabora.co.uk>
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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 "gst-dvm.h"
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#include <pthread.h>
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GST_DEBUG_CATEGORY (gst_dvm_debug);
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#define GST_CAT_DEFAULT gst_dvm_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 = NULL;
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static gboolean started_java_vm = FALSE;
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static pthread_key_t current_jni_env;
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static JNIEnv *
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gst_dvm_attach_current_thread (void)
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{
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JNIEnv *env;
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JavaVMAttachArgs args;
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GST_DEBUG ("Attaching thread %p", g_thread_self ());
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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, &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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static void
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gst_dvm_detach_current_thread (void *env)
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{
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GST_DEBUG ("Detaching thread %p", g_thread_self ());
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(*java_vm)->DetachCurrentThread (java_vm);
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}
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JNIEnv *
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gst_dvm_get_env (void)
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{
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JNIEnv *env;
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if ((env = pthread_getspecific (current_jni_env)) == NULL) {
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env = gst_dvm_attach_current_thread ();
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pthread_setspecific (current_jni_env, env);
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}
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return env;
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}
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gboolean
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gst_dvm_init (void)
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{
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jsize n_vms;
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GST_DEBUG_CATEGORY_INIT (gst_dvm_debug, "dvm", 0, "DVM");
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pthread_key_create (¤t_jni_env, gst_dvm_detach_current_thread);
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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[4];
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options[0].optionString = "-verbose:jni";
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options[1].optionString = "-verbose:gc";
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options[2].optionString = "-Xcheck:jni";
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options[3].optionString = "-Xdebug";
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vm_args.version = JNI_VERSION_1_4;
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vm_args.options = options;
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vm_args.nOptions = 4;
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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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started_java_vm = TRUE;
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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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103
sys/androidcamera/gst-dvm.h
Normal file
103
sys/androidcamera/gst-dvm.h
Normal file
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@ -0,0 +1,103 @@
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/* Dalvik Virtual Machine helper functions
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*
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* Copyright (C) 2012, Collabora Ltd.
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* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
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* Copyright (C) 2012, Cisco Systems, Inc.
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* Author: Youness Alaoui <youness.alaoui@collabora.co.uk>
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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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#ifndef __GST_DVM_H__
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#define __GST_DVM_H__
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#include <gst/gst.h>
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#include <jni.h>
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#define GST_DVM_GET_CLASS(k, name) { \
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jclass tmp; \
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\
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tmp = (*env)->FindClass (env, name); \
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if (!tmp) { \
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(*env)->ExceptionClear (env); \
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GST_ERROR ("Failed to get class %s", name); \
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return FALSE; \
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} \
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\
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k.klass = (*env)->NewGlobalRef (env, tmp); \
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if (!k.klass) { \
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(*env)->ExceptionClear (env); \
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(*env)->DeleteLocalRef (env, tmp); \
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GST_ERROR ("Failed to get %s class global reference", name); \
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return FALSE; \
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} \
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(*env)->DeleteLocalRef (env, tmp); \
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}
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#define GST_DVM_GET_STATIC_METHOD(k, method, signature) \
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k.method = (*env)->GetStaticMethodID (env, k.klass, #method, \
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signature); \
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if (!k.method) { \
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(*env)->ExceptionClear (env); \
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GST_ERROR ("Failed to get static method %s for %s", #method, #k); \
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return FALSE; \
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}
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#define GST_DVM_GET_METHOD(k, method, signature) \
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k.method = (*env)->GetMethodID (env, k.klass, #method, signature); \
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if (!k.method) { \
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(*env)->ExceptionClear (env); \
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GST_ERROR ("Failed to get method %s for %s", #method, #k); \
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return FALSE; \
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}
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#define GST_DVM_GET_CONSTRUCTOR(k, field, signature) \
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k.field = (*env)->GetMethodID (env, k.klass, "<init>", signature); \
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if (!k.field) { \
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(*env)->ExceptionClear (env); \
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GST_ERROR ("Failed to get constructor %s for %s", #field, #k); \
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return FALSE; \
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}
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#define GST_DVM_GET_FIELD(k, field, signature) \
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k.field = (*env)->GetFieldID (env, k.klass, #field, signature); \
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if (!k.field) { \
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(*env)->ExceptionClear (env); \
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GST_ERROR ("Failed to get field %s for %s", #field, #k); \
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return FALSE; \
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}
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#define GST_DVM_GET_CONSTANT(k, field, type, signature) { \
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jfieldID id; \
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\
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id = (*env)->GetStaticFieldID (env, k.klass, #field, signature); \
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if (!id) { \
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(*env)->ExceptionClear (env); \
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GST_ERROR ("Failed to get static field %s for %s", #field, #k); \
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return FALSE; \
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} \
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k.field = (*env)->GetStatic##type##Field (env, k.klass, id); \
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if ((*env)->ExceptionCheck (env)) { \
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(*env)->ExceptionClear (env); \
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GST_ERROR ("Failed to get " #type " constant %s", #field); \
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return FALSE; \
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} \
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}
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JNIEnv *gst_dvm_get_env (void);
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gboolean gst_dvm_init (void);
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#endif /* __GST_DVM_H__ */
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