mirror of
https://github.com/autc04/Retro68.git
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291 lines
8.2 KiB
C
291 lines
8.2 KiB
C
/*GstInputStream.c - Header file for the GstClasspathPlugin
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Copyright (C) 2007 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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#include <jni.h>
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#include <jcl.h>
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#include <string.h>
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#include <stdlib.h>
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#include <gdk/gdk.h>
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#include <glib.h>
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#include "gst_peer.h"
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#include "gnu_javax_sound_sampled_gstreamer_io_GstInputStream.h"
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#include "gst_input_stream.h"
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/* for caching */
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static jmethodID readID = NULL;
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static jmethodID pointerConstructorID = NULL;
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static jmethodID availableID = NULL;
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static jfieldID streamID = NULL;
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static jfieldID pointerDataID = NULL;
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struct _GstInputStreamPrivate
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{
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JavaVM *vm;
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jclass readerClass;
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jclass pointerClass;
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jobject reader;
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};
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/* ************************************************************************** */
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static void init_pointer_IDs (JNIEnv* env);
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/* ************************************************************************** */
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/* JNI Methods */
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JNIEXPORT void JNICALL
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Java_gnu_javax_sound_sampled_gstreamer_io_GstInputStream_init_1id_1cache
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(JNIEnv *env, jclass clazz)
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{
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readID = (*env)->GetMethodID(env, clazz, "read", "([BII)I");
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availableID = (*env)->GetMethodID(env, clazz, "available", "()I");
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streamID = (*env)->GetFieldID(env, clazz, "gstInputStream",
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"Lgnu/classpath/Pointer;");
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init_pointer_IDs(env);
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}
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JNIEXPORT void JNICALL
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Java_gnu_javax_sound_sampled_gstreamer_io_GstInputStream_init_1instance
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(JNIEnv *env, jobject reader)
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{
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GstInputStream *istream = NULL;
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jclass localReader = NULL;
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jclass localPointer = NULL;
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jobject _pointer = NULL;
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istream = (GstInputStream *) JCL_malloc (env, sizeof (GstInputStream));
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if (istream == NULL)
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return;
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istream->priv = (GstInputStreamPrivate *)
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JCL_malloc (env, sizeof (GstInputStreamPrivate));
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if (istream->priv == NULL)
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{
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JCL_free (env, istream);
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return;
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}
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/* get a local references first */
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localReader = (*env)->GetObjectClass(env, reader);
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if (localReader == NULL)
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{
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JCL_free (env, istream->priv);
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JCL_free (env, istream);
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JCL_ThrowException (env, "java/lang/InternalError",
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"Class Initialization failed.");
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return;
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}
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#if SIZEOF_VOID_P == 8
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localPointer = JCL_FindClass (env, "gnu/classpath/Pointer64");
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#else
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# if SIZEOF_VOID_P == 4
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localPointer = JCL_FindClass (env, "gnu/classpath/Pointer32");
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# else
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# error "Pointer size is not supported."
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# endif /* SIZEOF_VOID_P == 4 */
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#endif /* SIZEOF_VOID_P == 8 */
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if (localReader == NULL || localPointer == NULL)
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{
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JCL_free (env, istream->priv);
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JCL_free (env, istream);
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JCL_ThrowException (env, "java/lang/InternalError",
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"Class Initialization failed.");
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return;
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}
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/* fill out our structure */
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istream->priv->readerClass = (*env)->NewGlobalRef(env, localReader);
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istream->priv->pointerClass = (*env)->NewGlobalRef(env, localPointer);
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(*env)->GetJavaVM(env, &istream->priv->vm);
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istream->priv->reader = (*env)->NewGlobalRef(env, reader);
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_pointer = (*env)->GetObjectField(env, reader, streamID);
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/* this should be always null */
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if (_pointer == NULL)
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{
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#if SIZEOF_VOID_P == 8
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_pointer = (*env)->NewObject(env, istream->priv->pointerClass,
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pointerConstructorID, (jlong) istream);
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#else
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_pointer = (*env)->NewObject(env, istream->priv->pointerClass,
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pointerConstructorID, (jint) istream);
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#endif
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}
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else
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{
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#if SIZEOF_VOID_P == 8
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(*env)->SetLongField(env, reader, streamID, (jlong) istream);
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#else
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(*env)->SetIntField(env, reader, streamID, (jint) istream);
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#endif
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}
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/* store back our pointer into the calling class */
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(*env)->SetObjectField(env, reader, streamID, _pointer);
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}
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/* exported library functions */
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void
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gst_input_stream_clean (GstInputStream *self)
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{
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JNIEnv *env = NULL;
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env = gst_get_jenv (self->priv->vm);
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(*env)->DeleteGlobalRef (env, self->priv->reader);
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(*env)->DeleteGlobalRef (env, self->priv->readerClass);
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(*env)->DeleteGlobalRef (env, self->priv->pointerClass);
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JCL_free (env, self->priv);
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JCL_free (env, self);
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}
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int
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gst_input_stream_available (GstInputStream *self)
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{
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JNIEnv *env = NULL;
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if (self == NULL || self->priv == NULL ||
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self->priv->vm == NULL || self->priv->reader == NULL)
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{
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return -1;
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}
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env = gst_get_jenv (self->priv->vm);
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if (env == NULL)
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{
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g_warning("GstInputStream::gst_input_stream_available " \
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"failed to get java env");
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return -1;
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}
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return (*env)->CallIntMethod (env, self->priv->reader, availableID);
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}
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int
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gst_input_stream_read (GstInputStream *self, int *data, int offset,
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int length)
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{
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JNIEnv *env = NULL;
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int ret = -1;
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jbyteArray buffer;
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jbyte *bytes = NULL;
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if (self == NULL || self->priv == NULL ||
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self->priv->vm == NULL || self->priv->reader == NULL)
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{
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return -1;
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}
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env = gst_get_jenv (self->priv->vm);
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if (env == NULL)
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{
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g_warning("GstInputStream::gst_input_stream_read failed to get java env");
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return -1;
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}
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buffer = (*env)->NewByteArray (env, length);
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if (buffer == NULL)
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{
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g_warning ("GstInputStream::gst_input_stream_read called, failed");
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return -1;
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}
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ret = (*env)->CallIntMethod (env, self->priv->reader, readID, buffer, 0,
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length);
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if (ret < 0)
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{
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(*env)->DeleteLocalRef(env, buffer);
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return ret;
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}
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bytes = (*env)->GetByteArrayElements (env, buffer, NULL);
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/* copy bytes and release */
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memcpy (data + offset, bytes, ret);
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(*env)->ReleaseByteArrayElements (env, buffer, bytes, 0);
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(*env)->DeleteLocalRef (env, buffer);
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return ret;
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}
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/* private functions */
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static void init_pointer_IDs (JNIEnv* env)
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{
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jclass pointerClass = NULL;
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#if SIZEOF_VOID_P == 8
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pointerClass = JCL_FindClass (env, "gnu/classpath/Pointer64");
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if (pointerClass != NULL)
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{
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pointerDataID = (*env)->GetFieldID (env, pointerClass, "data", "J");
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pointerConstructorID = (*env)->GetMethodID (env, pointerClass, "<init>",
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"(J)V");
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}
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#else
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# if SIZEOF_VOID_P == 4
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pointerClass = JCL_FindClass (env, "gnu/classpath/Pointer32");
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if (pointerClass != NULL)
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{
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pointerDataID = (*env)->GetFieldID(env, pointerClass, "data", "I");
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pointerConstructorID = (*env)->GetMethodID(env, pointerClass,
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"<init>", "(I)V");
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}
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# else
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# error "Pointer size is not supported."
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# endif /* SIZEOF_VOID_P == 4 */
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#endif /* SIZEOF_VOID_P == 8 */
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}
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