From 537891db4127e8fe27c1038e6ff088df3d520008 Mon Sep 17 00:00:00 2001 From: Julien Moutte Date: Mon, 8 Dec 2003 20:01:01 +0000 Subject: Adding a new plugin: switch. Original commit message from CVS: Adding a new plugin: switch. It takes N input and only has 1 output. You can "switch" the forwarded input through properties ("nb_sources", "active_source") and i will probably add tuner interface support soon. It should be able to handle any kind of data passing through it. It is still a work in progress don't consider it usable for production yet. --- gst/switch/Makefile.am | 9 ++ gst/switch/gstswitch.c | 336 +++++++++++++++++++++++++++++++++++++++++++++++++ gst/switch/gstswitch.h | 67 ++++++++++ 3 files changed, 412 insertions(+) create mode 100644 gst/switch/Makefile.am create mode 100644 gst/switch/gstswitch.c create mode 100644 gst/switch/gstswitch.h (limited to 'gst') diff --git a/gst/switch/Makefile.am b/gst/switch/Makefile.am new file mode 100644 index 00000000..fcac882e --- /dev/null +++ b/gst/switch/Makefile.am @@ -0,0 +1,9 @@ + +plugin_LTLIBRARIES = libgstswitch.la + +libgstswitch_la_SOURCES = gstswitch.c +libgstswitch_la_CFLAGS = $(GST_CFLAGS) +libgstswitch_la_LIBADD = +libgstswitch_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) + +noinst_HEADERS = gstswitch.h diff --git a/gst/switch/gstswitch.c b/gst/switch/gstswitch.c new file mode 100644 index 00000000..09da3cdb --- /dev/null +++ b/gst/switch/gstswitch.c @@ -0,0 +1,336 @@ +/* GStreamer + * Copyright (C) 2003 Julien Moutte + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +/* Object header */ +#include "gstswitch.h" + +enum { + ARG_0, + ARG_NB_SOURCES, + ARG_ACTIVE_SOURCE +}; + +/* ElementFactory information */ +static GstElementDetails gst_switch_details = GST_ELEMENT_DETAILS ( + "Switch", + "Generic", + "N-to-1 input switching", + "Julien Moutte " +); + +GST_PAD_TEMPLATE_FACTORY (gst_switch_sink_factory, + "sink%d", + GST_PAD_SINK, + GST_PAD_REQUEST, + GST_CAPS_ANY +); + +static GstElementClass *parent_class = NULL; + +/* ============================================================= */ +/* */ +/* Private Methods */ +/* */ +/* ============================================================= */ + +static GstPad* +gst_switch_request_new_pad (GstElement *element, + GstPadTemplate *templ, + const gchar *unused) +{ + char *name = NULL; + GstPad *sinkpad = NULL; + GstSwitch *gstswitch = NULL; + GstSwitchPad *switchpad = NULL; + + g_return_val_if_fail (GST_IS_SWITCH (element), NULL); + + if (templ->direction != GST_PAD_SINK) { + g_warning ("gstswitch: requested a non sink pad\n"); + return NULL; + } + + gstswitch = GST_SWITCH (element); + + name = g_strdup_printf ("sink%d", gstswitch->nb_sinkpads); + + sinkpad = gst_pad_new_from_template (templ, name); + + if (name) + g_free (name); + + gst_element_add_pad (GST_ELEMENT (gstswitch), sinkpad); + + switchpad = g_new0 (GstSwitchPad, 1); + if (!switchpad) + return NULL; + + switchpad->sinkpad = sinkpad; + switchpad->data = NULL; + switchpad->forwarded = FALSE; + + gstswitch->sinkpads = g_list_insert (gstswitch->sinkpads, switchpad, + gstswitch->nb_sinkpads); + gstswitch->nb_sinkpads++; + + return sinkpad; +} + +static gboolean +gst_switch_poll_sinkpads (GstSwitch *gstswitch) +{ + GList *pads; + + g_return_val_if_fail (gstswitch != NULL, FALSE); + g_return_val_if_fail (GST_IS_SWITCH (gstswitch), FALSE); + + pads = gstswitch->sinkpads; + + while (pads) { + GstSwitchPad *switchpad = pads->data; + GstData *data = gst_pad_pull (switchpad->sinkpad); + if (GST_IS_EVENT (data) && + (GST_EVENT_TYPE (GST_EVENT (data)) == GST_EVENT_EOS)) { + /* If that data was not forwarded we unref it */ + if (!switchpad->forwarded && switchpad->data) { + gst_data_unref (switchpad->data); + switchpad->data = NULL; + } + gst_event_unref (GST_EVENT (data)); + } + else { + /* If that data was not forwarded we unref it */ + if (!switchpad->forwarded && switchpad->data) { + gst_data_unref (switchpad->data); + switchpad->data = NULL; + } + switchpad->data = data; + switchpad->forwarded = FALSE; + } + pads = g_list_next (pads); + } + + return TRUE; +} + +static void +gst_switch_loop (GstElement *element) +{ + GstSwitch *gstswitch = NULL; + GstSwitchPad *switchpad = NULL; + + g_return_if_fail (element != NULL); + g_return_if_fail (GST_IS_SWITCH (element)); + + gstswitch = GST_SWITCH (element); + + /* We poll all our sinkpads */ + gst_switch_poll_sinkpads (gstswitch); + + /* We get the active sinkpad */ + switchpad = g_list_nth_data (gstswitch->sinkpads, gstswitch->active_sinkpad); + + if (switchpad) { + /* Pushing active sinkpad data to srcpad */ + gst_pad_push (gstswitch->srcpad, switchpad->data); + /* Mark this data as forwarded so that it won't get unrefed on next poll */ + switchpad->forwarded = TRUE; + } +} + +/* =========================================== */ +/* */ +/* Properties */ +/* */ +/* =========================================== */ + +static void +gst_switch_set_property (GObject *object, guint prop_id, + const GValue *value, GParamSpec *pspec) +{ + GstSwitch *gstswitch = NULL; + + g_return_if_fail (GST_IS_SWITCH (object)); + + gstswitch = GST_SWITCH (object); + + switch (prop_id) { + case ARG_ACTIVE_SOURCE: + gstswitch->active_sinkpad = g_value_get_int (value); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gst_switch_get_property (GObject *object, guint prop_id, + GValue *value, GParamSpec *pspec) +{ + GstSwitch *gstswitch = NULL; + + g_return_if_fail (GST_IS_SWITCH (object)); + + gstswitch = GST_SWITCH (object); + + switch (prop_id) { + case ARG_ACTIVE_SOURCE: + g_value_set_int (value, gstswitch->active_sinkpad); + break; + case ARG_NB_SOURCES: + g_value_set_int (value, gstswitch->nb_sinkpads); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +/* =========================================== */ +/* */ +/* Init & Class init */ +/* */ +/* =========================================== */ + +static void +gst_switch_dispose (GObject *object) +{ + GstSwitch *gstswitch = NULL; + + gstswitch = GST_SWITCH (object); + + if (gstswitch->sinkpads) { + g_list_free (gstswitch->sinkpads); + gstswitch->sinkpads = NULL; + } + + G_OBJECT_CLASS (parent_class)->dispose (object); +} + +static void +gst_switch_init (GstSwitch *gstswitch) +{ + gstswitch->srcpad = gst_pad_new ("src", GST_PAD_SRC); + gst_element_add_pad (GST_ELEMENT (gstswitch), gstswitch->srcpad); + + gst_element_set_loop_function (GST_ELEMENT (gstswitch), gst_switch_loop); + + gstswitch->sinkpads = NULL; + gstswitch->active_sinkpad = 0; + gstswitch->nb_sinkpads = 0; +} + +static void +gst_switch_base_init (gpointer g_class) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_set_details (element_class, &gst_switch_details); + + gst_element_class_add_pad_template (element_class, + GST_PAD_TEMPLATE_GET (gst_switch_sink_factory)); +} + +static void +gst_switch_class_init (GstSwitchClass *klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + + parent_class = g_type_class_ref (GST_TYPE_ELEMENT); + + g_object_class_install_property (gobject_class, + ARG_NB_SOURCES, + g_param_spec_int ("nb_sources", + "number of sources", + "number of sources", + G_MININT, G_MAXINT, 0, + G_PARAM_READABLE)); + g_object_class_install_property (gobject_class, + ARG_ACTIVE_SOURCE, + g_param_spec_int ("active_source", + "active source", + "active source", + G_MININT, G_MAXINT, 0, + G_PARAM_READWRITE)); + + gobject_class->dispose = gst_switch_dispose; + gobject_class->set_property = gst_switch_set_property; + gobject_class->get_property = gst_switch_get_property; + + gstelement_class->request_new_pad = gst_switch_request_new_pad; +} + +/* ============================================================= */ +/* */ +/* Public Methods */ +/* */ +/* ============================================================= */ + +GType +gst_switch_get_type (void) +{ + static GType switch_type = 0; + + if (!switch_type) { + static const GTypeInfo switch_info = { + sizeof(GstSwitchClass), + gst_switch_base_init, + NULL, + (GClassInitFunc) gst_switch_class_init, + NULL, + NULL, + sizeof(GstSwitch), + 0, + (GInstanceInitFunc) gst_switch_init, + }; + + switch_type = g_type_register_static (GST_TYPE_ELEMENT, + "GstSwitch", &switch_info, 0); + } + + return switch_type; +} + +static gboolean +plugin_init (GstPlugin *plugin) +{ + return gst_element_register (plugin, "switch", GST_RANK_NONE, + GST_TYPE_SWITCH); +} + +GST_PLUGIN_DEFINE ( + GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "switch", + "N-to-1 input switching", + plugin_init, + VERSION, + GST_LICENSE, + GST_PACKAGE, + GST_ORIGIN +) diff --git a/gst/switch/gstswitch.h b/gst/switch/gstswitch.h new file mode 100644 index 00000000..20256503 --- /dev/null +++ b/gst/switch/gstswitch.h @@ -0,0 +1,67 @@ +/* GStreamer + * Copyright (C) 2003 Julien Moutte + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifndef __GST_SWITCH_H__ +#define __GST_SWITCH_H__ + +#include + +G_BEGIN_DECLS + +#define GST_TYPE_SWITCH \ + (gst_switch_get_type()) +#define GST_SWITCH(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_SWITCH, GstSwitch)) +#define GST_SWITCH_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SWITCH, GstSwitch)) +#define GST_IS_SWITCH(obj) \ + (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_SWITCH)) +#define GST_IS_SWITCH_CLASS(obj) \ + (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SWITCH)) + +typedef struct _GstSwitchPad GstSwitchPad; + +typedef struct _GstSwitch GstSwitch; +typedef struct _GstSwitchClass GstSwitchClass; + +struct _GstSwitchPad { + GstPad *sinkpad; + GstData *data; + gboolean forwarded; +}; + +struct _GstSwitch { + GstElement element; + + GList *sinkpads; + GstPad *srcpad; + + guint nb_sinkpads; + guint active_sinkpad; +}; + +struct _GstSwitchClass { + GstElementClass parent_class; +}; + +GType gst_switch_get_type (void); + +G_END_DECLS + +#endif /* __GST_SWITCH_H__ */ -- cgit v1.2.1