409 lines
12 KiB
C
409 lines
12 KiB
C
/*gstclasspathsrc.c - Class 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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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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/*
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* We don't really use version numbering here, we give it the same version
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* number of classpath, so that gstreamer is happy.
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* TODO: Maybe this should be moved in config.h instead?
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*/
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#define CLASSPATH_GST_PLUGIN_VERSION PACKAGE_VERSION
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <gst/gst.h>
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#include <gst/base/gstbasesrc.h>
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#include <gst/base/gstpushsrc.h>
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#include <glib.h>
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#include <glib/gprintf.h>
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#include <gdk/gdk.h>
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#include "gst_classpath_src.h"
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#include "gst_input_stream.h"
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GST_DEBUG_CATEGORY_STATIC (gst_classpath_src_debug);
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#define GST_CAT_DEFAULT gst_classpath_src_debug
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enum
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{
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ARG_0,
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ARG_INPUTSTREAM
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};
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struct _GstClasspathSrcPrivate
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{
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GstInputStream *istream;
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GstCaps *caps;
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};
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static const GstElementDetails gst_classpath_src_details =
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GST_ELEMENT_DETAILS ("ClasspathSrc",
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"Source/Network",
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"Read from a java input stream",
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"Mario Torre <neugens@limasoftware.net>");
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static GstStaticPadTemplate _template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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/* ***** plugin init ***** */
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static void
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_do_init (GType filesrc_type __attribute__ ((unused)))
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{
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GST_DEBUG_CATEGORY_INIT (gst_classpath_src_debug, "classpathsrc",
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0, "classpathsrc");
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}
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GST_BOILERPLATE_FULL (GstClasspathSrc, gst_classpath_src, GstPushSrc,
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GST_TYPE_PUSH_SRC, _do_init);
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static gboolean
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plugin_init (GstPlugin *plugin)
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{
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return gst_element_register (plugin, "classpathsrc",
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GST_RANK_NONE, GST_TYPE_CLASSPATH_SRC);
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}
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GST_PLUGIN_DEFINE_STATIC (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"classpathsrc",
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"Java InputStream Reader",
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plugin_init, CLASSPATH_GST_PLUGIN_VERSION,
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GST_LICENSE_UNKNOWN, /* GPL + Exception */
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"Classpath", "http://www.classpath.org/")
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/* ***** public class methods ***** */
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static void gst_classpath_src_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gst_classpath_src_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void gst_classpath_src_finalize (GObject *object);
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static GstCaps *gst_classpath_src_getcaps (GstBaseSrc *basesrc);
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static gboolean gst_classpath_src_start (GstBaseSrc *basesrc);
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static gboolean gst_classpath_src_stop (GstBaseSrc *basesrc);
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static GstFlowReturn gst_classpath_src_create (GstPushSrc *src,
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GstBuffer **buffer);
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static GstFlowReturn
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gst_classpath_src_create_stream (GstClasspathSrc *src, GstBuffer **buffer);
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static GstFlowReturn
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check_read (GstClasspathSrc *src, int read, int buffer_size,
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GstBuffer **buffer);
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/* ***** public class methods: end ***** */
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static void
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gst_classpath_src_base_init (gpointer gclass)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (gclass);
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&_template));
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gst_element_class_set_details (gstelement_class, &gst_classpath_src_details);
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}
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static void
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gst_classpath_src_class_init (GstClasspathSrcClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseSrcClass *gstbasesrc_class;
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GstPushSrcClass *gstpushsrc_class;
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GParamSpec *pspec;
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gobject_class = G_OBJECT_CLASS (klass);
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gstelement_class = GST_ELEMENT_CLASS (klass);
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gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
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gstpushsrc_class = GST_PUSH_SRC_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GstClasspathSrcPrivate));
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/* getter and setters */
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gobject_class->set_property = gst_classpath_src_set_property;
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gobject_class->get_property = gst_classpath_src_get_property;
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/* register properties */
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pspec = g_param_spec_pointer (GST_CLASSPATH_SRC_ISTREAM,
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"GstInputStream instance",
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"GstInputStream instance",
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G_PARAM_READWRITE);
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g_object_class_install_property (gobject_class, ARG_INPUTSTREAM, pspec);
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/* register callbacks */
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_classpath_src_finalize);
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gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_classpath_src_getcaps);
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gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_classpath_src_start);
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gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_classpath_src_stop);
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gstpushsrc_class->create = GST_DEBUG_FUNCPTR (gst_classpath_src_create);
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}
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/* ***** */
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static void
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gst_classpath_src_init (GstClasspathSrc *src,
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GstClasspathSrcClass * g_class __attribute__ ((unused)))
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{
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src->priv = G_TYPE_INSTANCE_GET_PRIVATE (src, GST_TYPE_CLASSPATH_SRC,
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GstClasspathSrcPrivate);
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src->priv->istream = NULL;
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src->priv->caps = NULL;
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}
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static void
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gst_classpath_src_finalize (GObject *object)
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{
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/* ************************************************************************** */
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static void
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gst_classpath_src_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GstClasspathSrc *src;
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g_return_if_fail (GST_IS_CLASSPATH_SRC (object));
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src = GST_CLASSPATH_SRC (object);
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GST_OBJECT_LOCK (src);
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switch (prop_id)
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{
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case ARG_INPUTSTREAM:
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{
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GST_STATE_LOCK (src);
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{
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GstState state;
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state = GST_STATE (src);
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if (state != GST_STATE_READY && state != GST_STATE_NULL)
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{
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GST_DEBUG_OBJECT (src, "setting reader in wrong state");
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GST_STATE_UNLOCK (src);
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break;
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}
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}
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GST_STATE_UNLOCK (src);
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/* FIXME: check if this is a valid instance of GstInputStream */
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src->priv->istream = g_value_get_pointer (value);
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}
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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GST_OBJECT_UNLOCK (src);
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}
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static void
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gst_classpath_src_get_property (GObject *object,
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guint prop_id __attribute__ ((unused)),
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GValue *value __attribute__ ((unused)),
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GParamSpec *pspec __attribute__ ((unused)))
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{
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/* TODO */
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}
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/* ************************************************************************** */
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static GstCaps *gst_classpath_src_getcaps (GstBaseSrc *basesrc)
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{
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GstClasspathSrc *src;
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GstCaps *caps = NULL;
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src = GST_CLASSPATH_SRC (basesrc);
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if (src->priv->caps)
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caps = gst_caps_copy (src->priv->caps);
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else
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caps = gst_caps_new_any ();
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GST_DEBUG_OBJECT (src, "returning caps %" GST_PTR_FORMAT, caps);
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g_assert (GST_IS_CAPS (caps));
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return caps;
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}
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static GstFlowReturn
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gst_classpath_src_create_stream (GstClasspathSrc *src, GstBuffer **buffer)
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{
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int buffer_size = 2048;
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int read = -1;
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buffer_size = gst_input_stream_available (src->priv->istream);
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if (buffer_size < 0)
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return GST_FLOW_ERROR;
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else if (buffer_size == 0)
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return GST_FLOW_WRONG_STATE;
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*buffer = gst_buffer_new_and_alloc (buffer_size);
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if (*buffer == NULL)
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{
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return GST_FLOW_ERROR;
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}
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read = gst_input_stream_read (src->priv->istream,
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(int *) GST_BUFFER_DATA (*buffer),
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0,
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buffer_size);
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return check_read (src, read, buffer_size, buffer);
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}
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GstFlowReturn
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check_read (GstClasspathSrc *src, int read, int buffer_size, GstBuffer **buffer)
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{
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if (G_UNLIKELY (read < 0))
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{
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g_warning("GST_FLOW_UNEXPECTED (read < 0)");
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gst_buffer_unref (*buffer);
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*buffer = NULL;
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return GST_FLOW_ERROR;
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}
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else if (G_UNLIKELY (read == 0))
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{
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g_warning("GST_FLOW_WRONG_STATE (read == 0)");
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gst_buffer_unref (*buffer);
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*buffer = NULL;
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return GST_FLOW_WRONG_STATE;
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}
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else if (G_UNLIKELY (read < buffer_size))
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{
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g_warning("shorter read");
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gst_buffer_unref (*buffer);
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*buffer = NULL;
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return GST_FLOW_ERROR;
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}
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GST_BUFFER_SIZE (*buffer) = read;
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gst_buffer_set_caps (*buffer, src->priv->caps);
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return GST_FLOW_OK;
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}
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static GstFlowReturn
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gst_classpath_src_create (GstPushSrc *basesrc, GstBuffer **buffer)
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{
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GstClasspathSrc *src = NULL;
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GstFlowReturn ret = GST_FLOW_OK;
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src = GST_CLASSPATH_SRC (basesrc);
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/* create the buffer */
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ret = gst_classpath_src_create_stream (src, buffer);
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return ret;
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}
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static gboolean
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gst_classpath_src_start (GstBaseSrc *basesrc)
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{
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GstClasspathSrc *src;
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src = GST_CLASSPATH_SRC (basesrc);
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if (src->priv->istream == NULL)
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{
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g_warning("GstInputStream is still null. You need to " \
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"pass a valid InputStream object");
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GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
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("GstInputStream is still null. You need to " \
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"pass a valid InputStream"));
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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gst_classpath_src_stop (GstBaseSrc *basesrc)
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{
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GstClasspathSrc *src;
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src = GST_CLASSPATH_SRC (basesrc);
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/* clean the stream */
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if (src->priv->istream != NULL)
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gst_input_stream_clean (src->priv->istream);
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if (src->priv->caps) {
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gst_caps_unref (src->priv->caps);
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src->priv->caps = NULL;
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}
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return TRUE;
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}
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