gstreamer/gst/videotestsrc/gstvideotestsrc.c
David Schleef 7d7d7df539 Fix height/width caps negotiation
Original commit message from CVS:
Fix height/width caps negotiation
2003-04-17 07:34:18 +00:00

388 lines
10 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
/*#define DEBUG_ENABLED */
#include <gstvideotestsrc.h>
#include <videotestsrc.h>
#include <string.h>
#include <stdlib.h>
/* elementfactory information */
static GstElementDetails videotestsrc_details = {
"Video test source",
"Source/Video",
"LGPL",
"Creates a test video stream",
VERSION,
"David A. Schleef <ds@schleef.org>",
"(C) 2002",
};
/* GstVideotestsrc signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_WIDTH,
ARG_HEIGHT,
ARG_FOURCC,
ARG_RATE,
/* FILL ME */
};
static void gst_videotestsrc_class_init (GstVideotestsrcClass * klass);
static void gst_videotestsrc_init (GstVideotestsrc * videotestsrc);
static GstElementStateReturn gst_videotestsrc_change_state (GstElement * element);
static void gst_videotestsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_videotestsrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec);
static GstBuffer *gst_videotestsrc_get (GstPad * pad);
static GstElementClass *parent_class = NULL;
static GstCaps * gst_videotestsrc_get_capslist (void);
static GstPadTemplate *
videotestsrc_src_template_factory(void)
{
static GstPadTemplate *templ = NULL;
if(!templ){
GstCaps *caps = GST_CAPS_NEW("ack","video/raw",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT));
caps = gst_caps_intersect(caps, gst_videotestsrc_get_capslist ());
templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
}
return templ;
}
GType
gst_videotestsrc_get_type (void)
{
static GType videotestsrc_type = 0;
if (!videotestsrc_type) {
static const GTypeInfo videotestsrc_info = {
sizeof (GstVideotestsrcClass), NULL,
NULL,
(GClassInitFunc) gst_videotestsrc_class_init,
NULL,
NULL,
sizeof (GstVideotestsrc),
0,
(GInstanceInitFunc) gst_videotestsrc_init,
};
videotestsrc_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstVideotestsrc", &videotestsrc_info, 0);
}
return videotestsrc_type;
}
static void
gst_videotestsrc_class_init (GstVideotestsrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_WIDTH,
g_param_spec_int ("width", "width", "width",
G_MININT, G_MAXINT, 0, G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HEIGHT,
g_param_spec_int ("height", "height", "height",
G_MININT, G_MAXINT, 0, G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FOURCC,
g_param_spec_string ("fourcc", "fourcc", "fourcc",
NULL, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_RATE,
g_param_spec_int ("rate", "Rate", "Frame rate",
1, 100, 30, G_PARAM_READWRITE));
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = gst_videotestsrc_set_property;
gobject_class->get_property = gst_videotestsrc_get_property;
gstelement_class->change_state = gst_videotestsrc_change_state;
}
static GstPadLinkReturn
gst_videotestsrc_srcconnect (GstPad * pad, GstCaps * caps)
{
GstVideotestsrc *videotestsrc;
GST_DEBUG (0, "gst_videotestsrc_srcconnect");
videotestsrc = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
videotestsrc->fourcc = paintinfo_find_by_caps(caps);
if(!videotestsrc->fourcc){
return GST_PAD_LINK_DELAYED;
}
printf ("videotestsrc: using fourcc element %p %s\n",
videotestsrc->fourcc, videotestsrc->fourcc->name);
gst_caps_get_int (caps, "width", &videotestsrc->width);
gst_caps_get_int (caps, "height", &videotestsrc->height);
videotestsrc->make_image = gst_videotestsrc_smpte;
videotestsrc->make_image = gst_videotestsrc_snow;
videotestsrc->bpp = videotestsrc->fourcc->bitspp;
GST_DEBUG (0, "size %d x %d", videotestsrc->width, videotestsrc->height);
return GST_PAD_LINK_OK;
}
static GstElementStateReturn
gst_videotestsrc_change_state (GstElement * element)
{
GstVideotestsrc *v;
v = GST_VIDEOTESTSRC (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_PLAYING:
v->pool = gst_pad_get_bufferpool (v->srcpad);
break;
case GST_STATE_PLAYING_TO_PAUSED:
v->pool = NULL;
break;
}
parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
static GstCaps *
gst_videotestsrc_get_capslist (void)
{
static GstCaps *capslist = NULL;
GstCaps *caps;
int i;
if (capslist)
return capslist;
for(i=0;i<n_fourccs;i++){
caps = paint_get_caps(fourcc_list + i);
capslist = gst_caps_append(capslist, caps);
}
return capslist;
}
static GstCaps *
gst_videotestsrc_getcaps (GstPad * pad, GstCaps * caps)
{
GstVideotestsrc *vts;
GstCaps *caps1;
GstCaps *caps2;
vts = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
if (vts->forced_format != NULL) {
struct fourcc_list_struct *fourcc;
fourcc = paintrect_find_name (vts->forced_format);
caps1 = paint_get_caps(fourcc);
} else {
caps1 = gst_videotestsrc_get_capslist ();
}
if(vts->width){
caps2 = GST_CAPS_NEW("ack","video/raw",
"width",GST_PROPS_INT(vts->width),
"height",GST_PROPS_INT(vts->height));
}else{
caps2 = GST_CAPS_NEW("ack","video/raw",
"width",GST_PROPS_INT_RANGE(16,4096),
"height",GST_PROPS_INT_RANGE(16,4096));
}
return gst_caps_intersect(caps1,caps2);
}
static void
gst_videotestsrc_init (GstVideotestsrc * videotestsrc)
{
GST_DEBUG (0, "gst_videotestsrc_init");
videotestsrc->srcpad =
gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (videotestsrc_src_template_factory), "src");
gst_pad_set_getcaps_function (videotestsrc->srcpad, gst_videotestsrc_getcaps);
gst_element_add_pad (GST_ELEMENT (videotestsrc), videotestsrc->srcpad);
gst_pad_set_get_function (videotestsrc->srcpad, gst_videotestsrc_get);
gst_pad_set_link_function (videotestsrc->srcpad, gst_videotestsrc_srcconnect);
videotestsrc->width = 640;
videotestsrc->height = 480;
videotestsrc->rate = 30;
videotestsrc->timestamp = 0;
videotestsrc->interval = GST_SECOND / videotestsrc->rate;
videotestsrc->pool = NULL;
}
static GstBuffer *
gst_videotestsrc_get (GstPad * pad)
{
GstVideotestsrc *videotestsrc;
gulong newsize;
GstBuffer *buf;
GST_DEBUG (0, "gst_videotestsrc_get");
g_return_val_if_fail (pad != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
videotestsrc = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
newsize = (videotestsrc->width * videotestsrc->height * videotestsrc->bpp) >> 3;
GST_DEBUG (0, "size=%ld %dx%d", newsize, videotestsrc->width, videotestsrc->height);
buf = NULL;
if (videotestsrc->pool) {
buf = gst_buffer_new_from_pool (videotestsrc->pool, 0, 0);
}
if (!buf) {
buf = gst_buffer_new ();
GST_BUFFER_SIZE (buf) = newsize;
GST_BUFFER_DATA (buf) = g_malloc (newsize);
}
g_return_val_if_fail (GST_BUFFER_DATA (buf) != NULL, NULL);
videotestsrc->timestamp += videotestsrc->interval;
GST_BUFFER_TIMESTAMP (buf) = videotestsrc->timestamp;
videotestsrc->make_image (videotestsrc, (void *) GST_BUFFER_DATA (buf),
videotestsrc->width, videotestsrc->height);
return buf;
}
static void
gst_videotestsrc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstVideotestsrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_VIDEOTESTSRC (object));
src = GST_VIDEOTESTSRC (object);
GST_DEBUG (0, "gst_videotestsrc_set_property");
switch (prop_id) {
case ARG_WIDTH:
src->width = g_value_get_int (value);
break;
case ARG_HEIGHT:
src->height = g_value_get_int (value);
break;
case ARG_FOURCC:
src->forced_format = g_strdup(g_value_get_string (value));
printf ("forcing FOURCC to \"%s\"\n", src->forced_format);
break;
case ARG_RATE:
src->rate = g_value_get_int (value);
src->interval = GST_SECOND/src->rate;
break;
default:
break;
}
}
static void
gst_videotestsrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
{
GstVideotestsrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_VIDEOTESTSRC (object));
src = GST_VIDEOTESTSRC (object);
switch (prop_id) {
case ARG_WIDTH:
g_value_set_int (value, src->width);
break;
case ARG_HEIGHT:
g_value_set_int (value, src->height);
break;
case ARG_FOURCC:
/* FIXME */
/* g_value_set_int (value, src->forced_format); */
break;
case ARG_RATE:
g_value_set_int (value, src->rate);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GModule * module, GstPlugin * plugin)
{
GstElementFactory *factory;
/* create an elementfactory for the videotestsrc element */
factory = gst_element_factory_new ("videotestsrc", GST_TYPE_VIDEOTESTSRC, &videotestsrc_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (videotestsrc_src_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videotestsrc",
plugin_init
};