gstreamer/gst/playback/gststreamselector.c
Ronald S. Bultje a321095c80 gst-libs/gst/riff/riff-read.c: Don't bail on unknown events.
Original commit message from CVS:
* gst-libs/gst/riff/riff-read.c: (gst_riff_read_use_event):
Don't bail on unknown events.
* gst/audioscale/gstaudioscale.c: (gst_audioscale_chain):
Don't crash on events before negotiation.
* gst/avi/gstavidemux.c: (gst_avi_demux_add_stream):
Send tags on pads, too.
* gst/playback/gststreamselector.c:
(gst_stream_selector_request_new_pad):
Forward events on first pad if no input was selected yet.
2005-01-10 16:09:25 +00:00

280 lines
8.7 KiB
C

/* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
*
* 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.
*/
/*
* !!!!!!!!!!!!!!!!! Big phat warning. !!!!!!!!!!!!!!!!!!!!!!
*
* The pads on the sinkside can be filled and the application is
* supposed to enable/disable them. The plugin will receive input
* data over the currently active pad and take care of data
* forwarding and negotiation. This plugin does nothing fancy. It
* exists to be light-weight and simple.
*
* This is not a generic switch element. This is not to be used for
* any such purpose. Patches to make it do that will be rejected.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gststreamselector.h"
GST_DEBUG_CATEGORY_STATIC (stream_selector_debug);
#define GST_CAT_DEFAULT stream_selector_debug
static GstStaticPadTemplate gst_stream_selector_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gst_stream_selector_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static void gst_stream_selector_dispose (GObject * object);
static void gst_stream_selector_init (GstStreamSelector * sel);
static void gst_stream_selector_base_init (GstStreamSelectorClass * klass);
static void gst_stream_selector_class_init (GstStreamSelectorClass * klass);
static GstCaps *gst_stream_selector_get_caps (GstPad * pad);
static GstPadLinkReturn gst_stream_selector_link (GstPad * pad,
const GstCaps * caps);
static GList *gst_stream_selector_get_linked_pads (GstPad * pad);
static GstPad *gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused);
static void gst_stream_selector_chain (GstPad * pad, GstData * data);
static GstElementClass *parent_class = NULL;
GType
gst_stream_selector_get_type (void)
{
static GType stream_selector_type = 0;
if (!stream_selector_type) {
static const GTypeInfo stream_selector_info = {
sizeof (GstStreamSelectorClass),
(GBaseInitFunc) gst_stream_selector_base_init,
NULL,
(GClassInitFunc) gst_stream_selector_class_init,
NULL,
NULL,
sizeof (GstStreamSelector),
0,
(GInstanceInitFunc) gst_stream_selector_init,
};
stream_selector_type =
g_type_register_static (GST_TYPE_ELEMENT,
"GstStreamSelector", &stream_selector_info, 0);
GST_DEBUG_CATEGORY_INIT (stream_selector_debug,
"streamselector", 0, "A stream-selector element");
}
return stream_selector_type;
}
static void
gst_stream_selector_base_init (GstStreamSelectorClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
static GstElementDetails gst_stream_selector_details =
GST_ELEMENT_DETAILS ("StreamSelector",
"Generic",
"N-to-1 input stream_selectoring",
"Julien Moutte <julien@moutte.net>\n"
"Ronald S. Bultje <rbultje@ronald.bitfreak.net>");
gst_element_class_set_details (element_class, &gst_stream_selector_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_stream_selector_sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_stream_selector_src_factory));
}
static void
gst_stream_selector_class_init (GstStreamSelectorClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->dispose = gst_stream_selector_dispose;
gstelement_class->request_new_pad = gst_stream_selector_request_new_pad;
}
static void
gst_stream_selector_init (GstStreamSelector * sel)
{
sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_internal_link_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_linked_pads));
gst_pad_set_link_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_link));
gst_pad_set_getcaps_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_caps));
gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
/* sinkpad management */
sel->last_active_sinkpad = NULL;
sel->nb_sinkpads = 0;
}
static void
gst_stream_selector_dispose (GObject * object)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
sel->last_active_sinkpad = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static GstPad *
gst_stream_selector_get_linked_pad (GstPad * pad)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
GstPad *otherpad = NULL;
if (pad == sel->srcpad)
otherpad = sel->last_active_sinkpad;
else if (pad == sel->last_active_sinkpad)
otherpad = sel->srcpad;
return otherpad;
}
static GstCaps *
gst_stream_selector_get_caps (GstPad * pad)
{
GstPad *otherpad = gst_stream_selector_get_linked_pad (pad);
if (!otherpad) {
GST_DEBUG_OBJECT (gst_pad_get_parent (pad),
"Pad %s not linked, returning ANY", gst_pad_get_name (pad));
return gst_caps_new_any ();
}
GST_DEBUG_OBJECT (gst_pad_get_parent (pad),
"Pad %s is linked (to %s), returning allowed-caps",
gst_pad_get_name (pad), gst_pad_get_name (otherpad));
return gst_pad_get_allowed_caps (otherpad);
}
static GstPadLinkReturn
gst_stream_selector_link (GstPad * pad, const GstCaps * caps)
{
GstPad *otherpad = gst_stream_selector_get_linked_pad (pad);
if (!otherpad) {
GST_DEBUG_OBJECT (gst_pad_get_parent (pad),
"Pad %s not linked, returning %s",
gst_pad_get_name (pad), GST_PAD_IS_SINK (pad) ? "ok" : "delayed");
return GST_PAD_IS_SINK (pad) ? GST_PAD_LINK_OK : GST_PAD_LINK_DELAYED;
}
GST_DEBUG_OBJECT (gst_pad_get_parent (pad),
"Pad %s is linked (to %s), returning other-trysetcaps",
gst_pad_get_name (pad), gst_pad_get_name (otherpad));
return gst_pad_try_set_caps (otherpad, caps);
}
static GList *
gst_stream_selector_get_linked_pads (GstPad * pad)
{
GstPad *otherpad = gst_stream_selector_get_linked_pad (pad);
if (!otherpad)
return NULL;
return g_list_append (NULL, otherpad);
}
static GstPad *
gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (element);
gchar *name = NULL;
GstPad *sinkpad = NULL;
g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
GST_LOG_OBJECT (sel, "Creating new pad %d", sel->nb_sinkpads);
name = g_strdup_printf ("sink%d", sel->nb_sinkpads++);
sinkpad = gst_pad_new_from_template (templ, name);
if (sel->nb_sinkpads == 1)
sel->last_active_sinkpad = sinkpad;
g_free (name);
gst_pad_set_link_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_link));
gst_pad_set_getcaps_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_caps));
gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_chain));
gst_pad_set_internal_link_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_linked_pads));
gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
return sinkpad;
}
static void
gst_stream_selector_chain (GstPad * pad, GstData * data)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
/* first, check if the active pad changed. If so, redo
* negotiation and fail if that fails. */
if (pad != sel->last_active_sinkpad) {
GstPadLinkReturn ret;
GST_LOG_OBJECT (sel, "stream change detected, switching from %s to %s",
sel->last_active_sinkpad ?
gst_pad_get_name (sel->last_active_sinkpad) : "none",
gst_pad_get_name (pad));
sel->last_active_sinkpad = pad;
ret = gst_pad_renegotiate (pad);
if (GST_PAD_LINK_FAILED (ret)) {
GST_ELEMENT_ERROR (sel, CORE, NEGOTIATION, (NULL), (NULL));
sel->last_active_sinkpad = NULL;
return;
}
}
/* forward */
GST_DEBUG_OBJECT (sel, "Forwarding %s %p from pad %s",
GST_IS_EVENT (data) ? "event" : "buffer", data, gst_pad_get_name (pad));
gst_pad_push (sel->srcpad, data);
}