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305 lines
8 KiB
C
305 lines
8 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstfakesrc.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gstfakesrc.h>
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GstElementDetails gst_fakesrc_details = {
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"Fake Source",
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"Source",
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"Push empty (no data) buffers around",
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VERSION,
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"Erik Walthinsen <omega@cse.ogi.edu>",
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"(C) 1999",
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};
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/* FakeSrc signals and args */
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enum {
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/* FILL ME */
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SIGNAL_HANDOFF,
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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ARG_NUM_SOURCES,
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ARG_LOOP_BASED,
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ARG_OUTPUT,
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ARG_PATERN,
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};
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#define GST_TYPE_FAKESRC_OUTPUT (gst_fakesrc_output_get_type())
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static GtkType
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gst_fakesrc_output_get_type(void) {
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static GtkType fakesrc_output_type = 0;
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static GtkEnumValue fakesrc_output[] = {
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{ FAKESRC_FIRST_LAST_LOOP, "1", "First-Last loop"},
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{ FAKESRC_LAST_FIRST_LOOP, "2", "Last-First loop"},
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{ FAKESRC_PING_PONG, "3", "Ping-Pong"},
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{ FAKESRC_ORDERED_RANDOM, "4", "Ordered Random"},
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{ FAKESRC_RANDOM, "5", "Random"},
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{ FAKESRC_PATERN_LOOP, "6", "Patern loop"},
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{ FAKESRC_PING_PONG_PATERN, "7", "Ping-Pong Patern"},
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{ FAKESRC_GET_ALWAYS_SUCEEDS, "8", "'_get' Always succeeds"},
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{0, NULL, NULL},
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};
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if (!fakesrc_output_type) {
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fakesrc_output_type = gtk_type_register_enum("GstFakeSrcOutput", fakesrc_output);
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}
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return fakesrc_output_type;
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}
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static void gst_fakesrc_class_init (GstFakeSrcClass *klass);
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static void gst_fakesrc_init (GstFakeSrc *fakesrc);
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static void gst_fakesrc_set_arg (GtkObject *object, GtkArg *arg, guint id);
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static void gst_fakesrc_get_arg (GtkObject *object, GtkArg *arg, guint id);
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static GstBuffer* gst_fakesrc_get (GstPad *pad);
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static void gst_fakesrc_loop (GstElement *element);
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static GstElementClass *parent_class = NULL;
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static guint gst_fakesrc_signals[LAST_SIGNAL] = { 0 };
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GtkType
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gst_fakesrc_get_type (void)
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{
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static GtkType fakesrc_type = 0;
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if (!fakesrc_type) {
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static const GtkTypeInfo fakesrc_info = {
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"GstFakeSrc",
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sizeof(GstFakeSrc),
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sizeof(GstFakeSrcClass),
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(GtkClassInitFunc)gst_fakesrc_class_init,
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(GtkObjectInitFunc)gst_fakesrc_init,
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(GtkArgSetFunc)NULL,
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(GtkArgGetFunc)NULL,
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(GtkClassInitFunc)NULL,
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};
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fakesrc_type = gtk_type_unique (GST_TYPE_ELEMENT, &fakesrc_info);
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}
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return fakesrc_type;
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}
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static void
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gst_fakesrc_class_init (GstFakeSrcClass *klass)
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{
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GtkObjectClass *gtkobject_class;
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gtkobject_class = (GtkObjectClass*)klass;
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parent_class = gtk_type_class (GST_TYPE_ELEMENT);
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gtk_object_add_arg_type ("GstFakeSrc::num_sources", GTK_TYPE_INT,
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GTK_ARG_READWRITE, ARG_NUM_SOURCES);
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gtk_object_add_arg_type ("GstFakeSrc::loop_based", GTK_TYPE_BOOL,
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GTK_ARG_READWRITE, ARG_LOOP_BASED);
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gtk_object_add_arg_type ("GstFakeSrc::output", GST_TYPE_FAKESRC_OUTPUT,
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GTK_ARG_READWRITE, ARG_OUTPUT);
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gtk_object_add_arg_type ("GstFakeSrc::patern", GTK_TYPE_STRING,
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GTK_ARG_READWRITE, ARG_PATERN);
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gtkobject_class->set_arg = gst_fakesrc_set_arg;
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gtkobject_class->get_arg = gst_fakesrc_get_arg;
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gst_fakesrc_signals[SIGNAL_HANDOFF] =
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gtk_signal_new ("handoff", GTK_RUN_LAST, gtkobject_class->type,
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GTK_SIGNAL_OFFSET (GstFakeSrcClass, handoff),
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gtk_marshal_NONE__NONE, GTK_TYPE_NONE, 0);
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gtk_object_class_add_signals (gtkobject_class, gst_fakesrc_signals,
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LAST_SIGNAL);
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}
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static void
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gst_fakesrc_init (GstFakeSrc *fakesrc)
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{
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GstPad *pad;
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// set the default number of
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fakesrc->numsrcpads = 1;
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// create our first output pad
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pad = gst_pad_new("src",GST_PAD_SRC);
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gst_pad_set_get_function(pad,gst_fakesrc_get);
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gst_element_add_pad(GST_ELEMENT(fakesrc),pad);
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fakesrc->srcpads = g_slist_append(NULL,pad);
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fakesrc->loop_based = FALSE;
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// we're ready right away, since we don't have any args...
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// gst_element_set_state(GST_ELEMENT(fakesrc),GST_STATE_READY);
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}
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static void
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gst_fakesrc_update_functions (GstFakeSrc *src)
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{
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GSList *pads;
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pads = src->srcpads;
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while (pads) {
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GstPad *pad = GST_PAD (pads->data);
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if (src->loop_based) {
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gst_element_set_loop_function (GST_ELEMENT (src), gst_fakesrc_loop);
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gst_pad_set_get_function (pad, NULL);
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}
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else {
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gst_pad_set_get_function (pad, gst_fakesrc_get);
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gst_element_set_loop_function (GST_ELEMENT (src), NULL);
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}
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pads = g_slist_next (pads);
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}
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}
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static void
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gst_fakesrc_set_arg (GtkObject *object, GtkArg *arg, guint id)
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{
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GstFakeSrc *src;
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gint new_numsrcs;
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GstPad *pad;
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/* it's not null if we got it, but it might not be ours */
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src = GST_FAKESRC (object);
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switch(id) {
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case ARG_NUM_SOURCES:
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new_numsrcs = GTK_VALUE_INT (*arg);
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if (new_numsrcs > src->numsrcpads) {
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while (src->numsrcpads != new_numsrcs) {
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pad = gst_pad_new(g_strdup_printf("src%d",src->numsrcpads),GST_PAD_SRC);
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gst_element_add_pad(GST_ELEMENT(src),pad);
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src->srcpads = g_slist_append(src->srcpads,pad);
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src->numsrcpads++;
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}
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gst_fakesrc_update_functions (src);
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}
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break;
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case ARG_LOOP_BASED:
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src->loop_based = GTK_VALUE_BOOL (*arg);
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gst_fakesrc_update_functions (src);
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break;
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case ARG_OUTPUT:
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break;
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case ARG_PATERN:
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break;
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default:
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break;
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}
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}
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static void
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gst_fakesrc_get_arg (GtkObject *object, GtkArg *arg, guint id)
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{
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GstFakeSrc *src;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_FAKESRC (object));
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src = GST_FAKESRC (object);
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switch (id) {
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case ARG_NUM_SOURCES:
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GTK_VALUE_INT (*arg) = src->numsrcpads;
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break;
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case ARG_LOOP_BASED:
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GTK_VALUE_BOOL (*arg) = src->loop_based;
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break;
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case ARG_OUTPUT:
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GTK_VALUE_INT (*arg) = src->output;
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break;
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case ARG_PATERN:
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GTK_VALUE_STRING (*arg) = src->patern;
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break;
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default:
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arg->type = GTK_TYPE_INVALID;
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break;
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}
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}
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/**
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* gst_fakesrc_get:
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* @src: the faksesrc to get
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*
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* generate an empty buffer and return it
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*
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* Returns: a new empty buffer
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*/
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static GstBuffer *
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gst_fakesrc_get(GstPad *pad)
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{
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GstFakeSrc *src;
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GstBuffer *buf;
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g_return_val_if_fail(pad != NULL, NULL);
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src = GST_FAKESRC(gst_pad_get_parent(pad));
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g_return_val_if_fail(GST_IS_FAKESRC(src), NULL);
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g_print("(%s:%s)> ",GST_DEBUG_PAD_NAME(pad));
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buf = gst_buffer_new();
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gtk_signal_emit (GTK_OBJECT (src), gst_fakesrc_signals[SIGNAL_HANDOFF],
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src);
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return buf;
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}
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/**
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* gst_fakesrc_loop:
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* @element: the faksesrc to loop
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*
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* generate an empty buffer and push it to the next element.
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*/
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static void
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gst_fakesrc_loop(GstElement *element)
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{
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GstFakeSrc *src;
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g_return_if_fail(element != NULL);
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g_return_if_fail(GST_IS_FAKESRC(element));
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src = GST_FAKESRC (element);
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do {
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GSList *pads;
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pads = src->srcpads;
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while (pads) {
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GstPad *pad = GST_PAD (pads->data);
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GstBuffer *buf;
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buf = gst_buffer_new();
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g_print("(%s:%s)> ",GST_DEBUG_PAD_NAME(pad));
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gtk_signal_emit (GTK_OBJECT (src), gst_fakesrc_signals[SIGNAL_HANDOFF],
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src);
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gst_pad_push (pad, buf);
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if (!GST_ELEMENT_IS_COTHREAD_STOPPING (element)) break;
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}
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} while (!GST_ELEMENT_IS_COTHREAD_STOPPING (element));
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}
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