gstreamer/plugins/elements/gstfakesrc.c
Wim Taymans 51cbf22624 This is a megapatch with the following changes:
Original commit message from CVS:
This is a megapatch with the following changes:

- moved the gchar *name to GstObject, removed the ones in GstElement and
GstPad.
- moved the parent handling completely into GstObject. This cause *all* of
the plugins to fail (except those that used gst_pad_get_parent)
- rearanged the XML save handling.
- GstObject now has a class function save/restore_thyself.
- GstObject has a generic method gst_object_save_thyself, this makes it
possible to fire a signal wehever a new object is loaded. This is needed
so we can add XML save hooks.
- GstXML API has changed slightly. You now have to create a GstXML object
first before you can actually load something. This makes it possible to
attach a signal to GstXML whenever an object is loaded. I'm not sure we
will keep this interface.
- GstObject can now print the path_string without knowing about the GstPad and
GstElement types.
- Added gst_bin_get_by_name_recurse_up to lookup an element in the current
element hierarchy.
- added XML namespaces to the saved pipelines the namespace is:
http://gstreamer.net/gst-core/1.0/
namespaces are needed to distinguish user generated XML from the core XML.

Note that the plugins still contain a macro GST_OBJECT_PARENT that will be
replaced with gst_pad_get_parent shortly.
2001-01-29 00:06:02 +00:00

340 lines
8.9 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstfakesrc.c:
*
* 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.
*/
#include <gstfakesrc.h>
GstElementDetails gst_fakesrc_details = {
"Fake Source",
"Source",
"Push empty (no data) buffers around",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>\n"
"Wim Taymans <wim.taymans@chello.be>"
"(C) 1999",
};
/* FakeSrc signals and args */
enum {
/* FILL ME */
SIGNAL_HANDOFF,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_NUM_SOURCES,
ARG_LOOP_BASED,
ARG_OUTPUT,
ARG_PATTERN,
ARG_NUM_BUFFERS,
};
#define GST_TYPE_FAKESRC_OUTPUT (gst_fakesrc_output_get_type())
static GtkType
gst_fakesrc_output_get_type(void) {
static GtkType fakesrc_output_type = 0;
static GtkEnumValue fakesrc_output[] = {
{ FAKESRC_FIRST_LAST_LOOP, "1", "First-Last loop"},
{ FAKESRC_LAST_FIRST_LOOP, "2", "Last-First loop"},
{ FAKESRC_PING_PONG, "3", "Ping-Pong"},
{ FAKESRC_ORDERED_RANDOM, "4", "Ordered Random"},
{ FAKESRC_RANDOM, "5", "Random"},
{ FAKESRC_PATTERN_LOOP, "6", "Patttern loop"},
{ FAKESRC_PING_PONG_PATTERN, "7", "Ping-Pong Pattern"},
{ FAKESRC_GET_ALWAYS_SUCEEDS, "8", "'_get' Always succeeds"},
{0, NULL, NULL},
};
if (!fakesrc_output_type) {
fakesrc_output_type = gtk_type_register_enum("GstFakeSrcOutput", fakesrc_output);
}
return fakesrc_output_type;
}
static void gst_fakesrc_class_init (GstFakeSrcClass *klass);
static void gst_fakesrc_init (GstFakeSrc *fakesrc);
static void gst_fakesrc_set_arg (GtkObject *object, GtkArg *arg, guint id);
static void gst_fakesrc_get_arg (GtkObject *object, GtkArg *arg, guint id);
static GstBuffer* gst_fakesrc_get (GstPad *pad);
static void gst_fakesrc_loop (GstElement *element);
static GstElementClass *parent_class = NULL;
static guint gst_fakesrc_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_fakesrc_get_type (void)
{
static GtkType fakesrc_type = 0;
if (!fakesrc_type) {
static const GtkTypeInfo fakesrc_info = {
"GstFakeSrc",
sizeof(GstFakeSrc),
sizeof(GstFakeSrcClass),
(GtkClassInitFunc)gst_fakesrc_class_init,
(GtkObjectInitFunc)gst_fakesrc_init,
(GtkArgSetFunc)NULL,
(GtkArgGetFunc)NULL,
(GtkClassInitFunc)NULL,
};
fakesrc_type = gtk_type_unique (GST_TYPE_ELEMENT, &fakesrc_info);
}
return fakesrc_type;
}
static void
gst_fakesrc_class_init (GstFakeSrcClass *klass)
{
GtkObjectClass *gtkobject_class;
gtkobject_class = (GtkObjectClass*)klass;
parent_class = gtk_type_class (GST_TYPE_ELEMENT);
gtk_object_add_arg_type ("GstFakeSrc::num_sources", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_NUM_SOURCES);
gtk_object_add_arg_type ("GstFakeSrc::loop_based", GTK_TYPE_BOOL,
GTK_ARG_READWRITE, ARG_LOOP_BASED);
gtk_object_add_arg_type ("GstFakeSrc::output", GST_TYPE_FAKESRC_OUTPUT,
GTK_ARG_READWRITE, ARG_OUTPUT);
gtk_object_add_arg_type ("GstFakeSrc::pattern", GTK_TYPE_STRING,
GTK_ARG_READWRITE, ARG_PATTERN);
gtk_object_add_arg_type ("GstFakeSrc::num_buffers", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_NUM_BUFFERS);
gtkobject_class->set_arg = gst_fakesrc_set_arg;
gtkobject_class->get_arg = gst_fakesrc_get_arg;
gst_fakesrc_signals[SIGNAL_HANDOFF] =
gtk_signal_new ("handoff", GTK_RUN_LAST, gtkobject_class->type,
GTK_SIGNAL_OFFSET (GstFakeSrcClass, handoff),
gtk_marshal_NONE__NONE, GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (gtkobject_class, gst_fakesrc_signals,
LAST_SIGNAL);
}
static void
gst_fakesrc_init (GstFakeSrc *fakesrc)
{
GstPad *pad;
// set the default number of
fakesrc->numsrcpads = 1;
// create our first output pad
pad = gst_pad_new("src",GST_PAD_SRC);
gst_element_add_pad(GST_ELEMENT(fakesrc),pad);
fakesrc->srcpads = g_slist_append(NULL,pad);
fakesrc->loop_based = TRUE;
if (fakesrc->loop_based)
gst_element_set_loop_function (GST_ELEMENT (fakesrc), gst_fakesrc_loop);
else
gst_pad_set_get_function(pad,gst_fakesrc_get);
fakesrc->num_buffers = -1;
// we're ready right away, since we don't have any args...
// gst_element_set_state(GST_ELEMENT(fakesrc),GST_STATE_READY);
}
static void
gst_fakesrc_update_functions (GstFakeSrc *src)
{
GSList *pads;
pads = src->srcpads;
while (pads) {
GstPad *pad = GST_PAD (pads->data);
if (src->loop_based) {
gst_element_set_loop_function (GST_ELEMENT (src), gst_fakesrc_loop);
gst_pad_set_get_function (pad, NULL);
}
else {
gst_pad_set_get_function (pad, gst_fakesrc_get);
gst_element_set_loop_function (GST_ELEMENT (src), NULL);
}
pads = g_slist_next (pads);
}
}
static void
gst_fakesrc_set_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstFakeSrc *src;
gint new_numsrcs;
GstPad *pad;
/* it's not null if we got it, but it might not be ours */
src = GST_FAKESRC (object);
switch(id) {
case ARG_NUM_SOURCES:
new_numsrcs = GTK_VALUE_INT (*arg);
if (new_numsrcs > src->numsrcpads) {
while (src->numsrcpads != new_numsrcs) {
pad = gst_pad_new(g_strdup_printf("src%d",src->numsrcpads),GST_PAD_SRC);
gst_element_add_pad(GST_ELEMENT(src),pad);
src->srcpads = g_slist_append(src->srcpads,pad);
src->numsrcpads++;
}
gst_fakesrc_update_functions (src);
}
break;
case ARG_LOOP_BASED:
src->loop_based = GTK_VALUE_BOOL (*arg);
gst_fakesrc_update_functions (src);
break;
case ARG_OUTPUT:
break;
case ARG_PATTERN:
break;
case ARG_NUM_BUFFERS:
src->num_buffers = GTK_VALUE_INT (*arg);
break;
default:
break;
}
}
static void
gst_fakesrc_get_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstFakeSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_FAKESRC (object));
src = GST_FAKESRC (object);
switch (id) {
case ARG_NUM_SOURCES:
GTK_VALUE_INT (*arg) = src->numsrcpads;
break;
case ARG_LOOP_BASED:
GTK_VALUE_BOOL (*arg) = src->loop_based;
break;
case ARG_OUTPUT:
GTK_VALUE_INT (*arg) = src->output;
break;
case ARG_PATTERN:
GTK_VALUE_STRING (*arg) = src->pattern;
break;
case ARG_NUM_BUFFERS:
GTK_VALUE_INT (*arg) = src->num_buffers;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
/**
* gst_fakesrc_get:
* @src: the faksesrc to get
*
* generate an empty buffer and return it
*
* Returns: a new empty buffer
*/
static GstBuffer *
gst_fakesrc_get(GstPad *pad)
{
GstFakeSrc *src;
GstBuffer *buf;
g_return_val_if_fail (pad != NULL, NULL);
src = GST_FAKESRC (gst_pad_get_parent (pad));
g_return_val_if_fail (GST_IS_FAKESRC (src), NULL);
if (src->num_buffers == 0) {
gst_pad_set_eos (pad);
return NULL;
}
else {
if (src->num_buffers > 0)
src->num_buffers--;
}
g_print("fakesrc: ******* (%s:%s)> \n",GST_DEBUG_PAD_NAME(pad));
buf = gst_buffer_new();
gtk_signal_emit (GTK_OBJECT (src), gst_fakesrc_signals[SIGNAL_HANDOFF],
src);
return buf;
}
/**
* gst_fakesrc_loop:
* @element: the faksesrc to loop
*
* generate an empty buffer and push it to the next element.
*/
static void
gst_fakesrc_loop(GstElement *element)
{
GstFakeSrc *src;
g_return_if_fail(element != NULL);
g_return_if_fail(GST_IS_FAKESRC(element));
src = GST_FAKESRC (element);
do {
GSList *pads;
pads = src->srcpads;
while (pads) {
GstPad *pad = GST_PAD (pads->data);
GstBuffer *buf;
if (src->num_buffers == 0) {
gst_pad_set_eos (pad);
return;
}
else {
if (src->num_buffers > 0)
src->num_buffers--;
}
buf = gst_buffer_new();
g_print("fakesrc: ******* (%s:%s)> \n",GST_DEBUG_PAD_NAME(pad));
gtk_signal_emit (GTK_OBJECT (src), gst_fakesrc_signals[SIGNAL_HANDOFF],
src);
gst_pad_push (pad, buf);
pads = g_slist_next (pads);
}
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING (element));
}