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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/native/jni/gstreamer-peer/gst_input_stream.c | |
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Diffstat (limited to 'libjava/classpath/native/jni/gstreamer-peer/gst_input_stream.c')
-rw-r--r-- | libjava/classpath/native/jni/gstreamer-peer/gst_input_stream.c | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/gstreamer-peer/gst_input_stream.c b/libjava/classpath/native/jni/gstreamer-peer/gst_input_stream.c new file mode 100644 index 000000000..c5e512954 --- /dev/null +++ b/libjava/classpath/native/jni/gstreamer-peer/gst_input_stream.c @@ -0,0 +1,290 @@ +/*GstInputStream.c - Header file for the GstClasspathPlugin + Copyright (C) 2007 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +#include <jni.h> +#include <jcl.h> + +#include <string.h> +#include <stdlib.h> + +#include <gdk/gdk.h> + +#include <glib.h> + +#include "gst_peer.h" + +#include "gnu_javax_sound_sampled_gstreamer_io_GstInputStream.h" +#include "gst_input_stream.h" + +/* for caching */ +static jmethodID readID = NULL; +static jmethodID pointerConstructorID = NULL; +static jmethodID availableID = NULL; + +static jfieldID streamID = NULL; +static jfieldID pointerDataID = NULL; + +struct _GstInputStreamPrivate +{ + JavaVM *vm; + jclass readerClass; + jclass pointerClass; + + jobject reader; +}; + +/* ************************************************************************** */ + +static void init_pointer_IDs (JNIEnv* env); + +/* ************************************************************************** */ + +/* JNI Methods */ + +JNIEXPORT void JNICALL +Java_gnu_javax_sound_sampled_gstreamer_io_GstInputStream_init_1id_1cache + (JNIEnv *env, jclass clazz) +{ + readID = (*env)->GetMethodID(env, clazz, "read", "([BII)I"); + availableID = (*env)->GetMethodID(env, clazz, "available", "()I"); + + streamID = (*env)->GetFieldID(env, clazz, "gstInputStream", + "Lgnu/classpath/Pointer;"); + init_pointer_IDs(env); +} + +JNIEXPORT void JNICALL +Java_gnu_javax_sound_sampled_gstreamer_io_GstInputStream_init_1instance + (JNIEnv *env, jobject reader) +{ + GstInputStream *istream = NULL; + + jclass localReader = NULL; + jclass localPointer = NULL; + jobject _pointer = NULL; + + istream = (GstInputStream *) JCL_malloc (env, sizeof (GstInputStream)); + if (istream == NULL) + return; + + istream->priv = (GstInputStreamPrivate *) + JCL_malloc (env, sizeof (GstInputStreamPrivate)); + if (istream->priv == NULL) + { + JCL_free (env, istream); + return; + } + + /* get a local references first */ + localReader = (*env)->GetObjectClass(env, reader); + if (localReader == NULL) + { + JCL_free (env, istream->priv); + JCL_free (env, istream); + JCL_ThrowException (env, "java/lang/InternalError", + "Class Initialization failed."); + + return; + } + +#if SIZEOF_VOID_P == 8 + localPointer = JCL_FindClass (env, "gnu/classpath/Pointer64"); +#else +# if SIZEOF_VOID_P == 4 + localPointer = JCL_FindClass (env, "gnu/classpath/Pointer32"); +# else +# error "Pointer size is not supported." +# endif /* SIZEOF_VOID_P == 4 */ +#endif /* SIZEOF_VOID_P == 8 */ + + if (localReader == NULL || localPointer == NULL) + { + JCL_free (env, istream->priv); + JCL_free (env, istream); + JCL_ThrowException (env, "java/lang/InternalError", + "Class Initialization failed."); + return; + } + + /* fill out our structure */ + istream->priv->readerClass = (*env)->NewGlobalRef(env, localReader); + istream->priv->pointerClass = (*env)->NewGlobalRef(env, localPointer); + (*env)->GetJavaVM(env, &istream->priv->vm); + istream->priv->reader = (*env)->NewGlobalRef(env, reader); + + _pointer = (*env)->GetObjectField(env, reader, streamID); + + /* this should be always null */ + if (_pointer == NULL) + { +#if SIZEOF_VOID_P == 8 + _pointer = (*env)->NewObject(env, istream->priv->pointerClass, + pointerConstructorID, (jlong) istream); +#else + _pointer = (*env)->NewObject(env, istream->priv->pointerClass, + pointerConstructorID, (jint) istream); +#endif + } + else + { +#if SIZEOF_VOID_P == 8 + (*env)->SetLongField(env, reader, streamID, (jlong) istream); +#else + (*env)->SetIntField(env, reader, streamID, (jint) istream); +#endif + } + + /* store back our pointer into the calling class */ + (*env)->SetObjectField(env, reader, streamID, _pointer); +} + +/* exported library functions */ + +void +gst_input_stream_clean (GstInputStream *self) +{ + JNIEnv *env = NULL; + + env = gst_get_jenv (self->priv->vm); + + (*env)->DeleteGlobalRef (env, self->priv->reader); + (*env)->DeleteGlobalRef (env, self->priv->readerClass); + (*env)->DeleteGlobalRef (env, self->priv->pointerClass); + + JCL_free (env, self->priv); + JCL_free (env, self); +} + +int +gst_input_stream_available (GstInputStream *self) +{ + JNIEnv *env = NULL; + + if (self == NULL || self->priv == NULL || + self->priv->vm == NULL || self->priv->reader == NULL) + { + return -1; + } + + env = gst_get_jenv (self->priv->vm); + if (env == NULL) + { + g_warning("GstInputStream::gst_input_stream_available " \ + "failed to get java env"); + return -1; + } + + return (*env)->CallIntMethod (env, self->priv->reader, availableID); +} + +int +gst_input_stream_read (GstInputStream *self, int *data, int offset, + int length) +{ + JNIEnv *env = NULL; + + int ret = -1; + jbyteArray buffer; + jbyte *bytes = NULL; + + if (self == NULL || self->priv == NULL || + self->priv->vm == NULL || self->priv->reader == NULL) + { + return -1; + } + + env = gst_get_jenv (self->priv->vm); + if (env == NULL) + { + g_warning("GstInputStream::gst_input_stream_read failed to get java env"); + return -1; + } + + buffer = (*env)->NewByteArray (env, length); + if (buffer == NULL) + { + g_warning ("GstInputStream::gst_input_stream_read called, failed"); + return -1; + } + + ret = (*env)->CallIntMethod (env, self->priv->reader, readID, buffer, 0, + length); + if (ret < 0) + { + (*env)->DeleteLocalRef(env, buffer); + return ret; + } + + bytes = (*env)->GetByteArrayElements (env, buffer, NULL); + + /* copy bytes and release */ + memcpy (data + offset, bytes, ret); + + (*env)->ReleaseByteArrayElements (env, buffer, bytes, 0); + (*env)->DeleteLocalRef (env, buffer); + + return ret; +} + +/* private functions */ + +static void init_pointer_IDs (JNIEnv* env) +{ + jclass pointerClass = NULL; + +#if SIZEOF_VOID_P == 8 + pointerClass = JCL_FindClass (env, "gnu/classpath/Pointer64"); + if (pointerClass != NULL) + { + pointerDataID = (*env)->GetFieldID (env, pointerClass, "data", "J"); + pointerConstructorID = (*env)->GetMethodID (env, pointerClass, "<init>", + "(J)V"); + } +#else +# if SIZEOF_VOID_P == 4 + pointerClass = JCL_FindClass (env, "gnu/classpath/Pointer32"); + if (pointerClass != NULL) + { + pointerDataID = (*env)->GetFieldID(env, pointerClass, "data", "I"); + pointerConstructorID = (*env)->GetMethodID(env, pointerClass, + "<init>", "(I)V"); + } +# else +# error "Pointer size is not supported." +# endif /* SIZEOF_VOID_P == 4 */ +#endif /* SIZEOF_VOID_P == 8 */ +} |