gstreamer/gst/elements/gstfakesrc.c
Erik Walthinsen 7f8d8fe8d5 Merged from GOBJECT1 to HEAD at 200106241
Original commit message from CVS:
Merged from GOBJECT1 to HEAD at 200106241
2001-06-25 01:20:11 +00:00

380 lines
10 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,
ARG_EOS,
ARG_SILENT
};
#define GST_TYPE_FAKESRC_OUTPUT (gst_fakesrc_output_get_type())
static GType
gst_fakesrc_output_get_type(void) {
static GType fakesrc_output_type = 0;
static GEnumValue 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 = g_enum_register_static("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_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_fakesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
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 };
GType
gst_fakesrc_get_type (void)
{
static GType fakesrc_type = 0;
if (!fakesrc_type) {
static const GTypeInfo fakesrc_info = {
sizeof(GstFakeSrcClass),
NULL,
NULL,
(GClassInitFunc)gst_fakesrc_class_init,
NULL,
NULL,
sizeof(GstFakeSrc),
0,
(GInstanceInitFunc)gst_fakesrc_init,
};
fakesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFakeSrc", &fakesrc_info, 0);
}
return fakesrc_type;
}
static void
gst_fakesrc_class_init (GstFakeSrcClass *klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NUM_SOURCES,
g_param_spec_int("num_sources","num_sources","num_sources",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_LOOP_BASED,
g_param_spec_boolean("loop_based","loop_based","loop_based",
TRUE,G_PARAM_READWRITE)); // CHECKME
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_OUTPUT,
g_param_spec_enum("output","output","output",
GST_TYPE_FAKESRC_OUTPUT,FAKESRC_FIRST_LAST_LOOP,G_PARAM_READWRITE)); // CHECKME!
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_PATTERN,
g_param_spec_string("pattern","pattern","pattern",
NULL, G_PARAM_READWRITE)); // CHECKME
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NUM_BUFFERS,
g_param_spec_int("num_buffers","num_buffers","num_buffers",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_EOS,
g_param_spec_boolean("eos","eos","eos",
TRUE,G_PARAM_READWRITE)); // CHECKME
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SILENT,
g_param_spec_boolean("silent","silent","silent",
TRUE,G_PARAM_READWRITE)); // CHECKME
gst_fakesrc_signals[SIGNAL_HANDOFF] =
g_signal_newc ("handoff", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstFakeSrcClass, handoff), NULL, NULL,
g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1,
G_TYPE_POINTER);
gobject_class->set_property = gst_fakesrc_set_property;
gobject_class->get_property = gst_fakesrc_get_property;
}
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;
fakesrc->silent = FALSE;
// 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_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
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 (prop_id) {
case ARG_NUM_SOURCES:
new_numsrcs = g_value_get_int (value);
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 = g_value_get_boolean (value);
gst_fakesrc_update_functions (src);
break;
case ARG_OUTPUT:
break;
case ARG_PATTERN:
break;
case ARG_NUM_BUFFERS:
src->num_buffers = g_value_get_int (value);
break;
case ARG_EOS:
src->eos = g_value_get_boolean (value);
GST_INFO (0, "will EOS on next buffer");
break;
case ARG_SILENT:
src->silent = g_value_get_boolean (value);
break;
default:
break;
}
}
static void
gst_fakesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
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 (prop_id) {
case ARG_NUM_SOURCES:
g_value_set_int (value, src->numsrcpads);
break;
case ARG_LOOP_BASED:
g_value_set_boolean (value, src->loop_based);
break;
case ARG_OUTPUT:
g_value_set_int (value, src->output);
break;
case ARG_PATTERN:
g_value_set_string (value, src->pattern);
break;
case ARG_NUM_BUFFERS:
g_value_set_int (value, src->num_buffers);
break;
case ARG_EOS:
g_value_set_boolean (value, src->eos);
break;
case ARG_SILENT:
g_value_set_boolean (value, src->silent);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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--;
}
if (src->eos) {
GST_INFO (0, "fakesrc is setting eos on pad");
gst_pad_set_eos (pad);
return NULL;
}
if (!src->silent)
g_print("fakesrc: ******* (%s:%s)> \n",GST_DEBUG_PAD_NAME(pad));
buf = gst_buffer_new();
g_signal_emit (G_OBJECT (src), gst_fakesrc_signals[SIGNAL_HANDOFF], 0,
buf);
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--;
}
if (src->eos) {
GST_INFO (0, "fakesrc is setting eos on pad");
gst_pad_set_eos (pad);
return;
}
buf = gst_buffer_new();
if (!src->silent)
g_print("fakesrc: ******* (%s:%s)> \n",GST_DEBUG_PAD_NAME(pad));
g_signal_emit (G_OBJECT (src), gst_fakesrc_signals[SIGNAL_HANDOFF], 0,
buf);
gst_pad_push (pad, buf);
pads = g_slist_next (pads);
}
} while (!GST_ELEMENT_IS_COTHREAD_STOPPING (element));
}