New plugin for generating a test video stream

Original commit message from CVS:
New plugin for generating a test video stream
This commit is contained in:
David Schleef 2002-07-26 22:18:57 +00:00
parent db77f68c5b
commit e5f5cc155c
3 changed files with 449 additions and 0 deletions

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plugindir = $(libdir)/gst
plugin_LTLIBRARIES = libgstvideotestsrc.la
libgstvideotestsrc_la_SOURCES = \
gstvideotestsrc.c
libgstvideotestsrc_la_CFLAGS = -O2 $(FOMIT_FRAME_POINTER) -funroll-all-loops -finline-functions -ffast-math $(GST_CFLAGS)
libgstvideotestsrc_la_LIBADD =
libgstvideotestsrc_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = gstvideotestsrc.h

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/* 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 <stdlib.h>
/* elementfactory information */
static GstElementDetails videotestsrc_details = {
"Video test source",
"Source/Video",
"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_METHOD,
/* FILL ME */
};
GST_PAD_TEMPLATE_FACTORY (src_templ,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"videotestsrc_caps",
"video/raw",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')),
"width", GST_PROPS_INT(640),
"height", GST_PROPS_INT(480)
)
)
#define GST_TYPE_VIDEOTESTSRC_METHOD (gst_videotestsrc_method_get_type())
static GType
gst_videotestsrc_method_get_type (void)
{
static GType videotestsrc_method_type = 0;
static GEnumValue videotestsrc_methods[] = {
{ GST_VIDEOTESTSRC_POINT_SAMPLE, "0", "Point Sample" },
{ GST_VIDEOTESTSRC_NEAREST, "1", "Nearest" },
{ GST_VIDEOTESTSRC_BILINEAR, "2", "Bilinear" },
{ GST_VIDEOTESTSRC_BICUBIC, "3", "Bicubic" },
{ 0, NULL, NULL },
};
if (!videotestsrc_method_type) {
videotestsrc_method_type = g_enum_register_static ("GstVideotestsrcMethod", videotestsrc_methods);
}
return videotestsrc_method_type;
}
static void gst_videotestsrc_class_init (GstVideotestsrcClass *klass);
static void gst_videotestsrc_init (GstVideotestsrc *videotestsrc);
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;
void gst_videotestsrc_setup (GstVideotestsrc *v);
static void random_chars(unsigned char *dest, int nbytes);
static void gst_videotestsrc_random_yuv (GstVideotestsrc *v, unsigned char *dest, int w, int h);
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_METHOD,
g_param_spec_enum("method","method","method",
GST_TYPE_VIDEOTESTSRC_METHOD,0,G_PARAM_READWRITE)); /* CHECKME! */
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;
}
static GstPadConnectReturn
gst_videotestsrc_srcconnect (GstPad *pad, GstCaps *caps)
{
GstVideotestsrc *videotestsrc;
GST_DEBUG(0,"gst_videotestsrc_srcconnect");
videotestsrc = GST_VIDEOTESTSRC (gst_pad_get_parent (pad));
#if 0
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_CONNECT_DELAYED;
}
#endif
gst_caps_get_fourcc_int (caps, "format", &videotestsrc->format);
gst_caps_get_int (caps, "width", &videotestsrc->width);
gst_caps_get_int (caps, "height", &videotestsrc->height);
gst_videotestsrc_setup(videotestsrc);
GST_DEBUG (0,"size %d x %d",videotestsrc->width, videotestsrc->height);
return GST_PAD_CONNECT_OK;
}
static void
gst_videotestsrc_init (GstVideotestsrc *videotestsrc)
{
GST_DEBUG(0,"gst_videotestsrc_init");
/*gst_pad_set_negotiate_function(videotestsrc->sinkpad,videotestsrc_negotiate_sink); */
//gst_element_add_pad(GST_ELEMENT(videotestsrc),videotestsrc->sinkpad);
//gst_pad_set_chain_function(videotestsrc->sinkpad,gst_videotestsrc_chain);
videotestsrc->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (src_templ), "src");
/*gst_pad_set_negotiate_function(videotestsrc->srcpad,videotestsrc_negotiate_src); */
gst_element_add_pad(GST_ELEMENT(videotestsrc),videotestsrc->srcpad);
gst_pad_set_get_function(videotestsrc->srcpad,gst_videotestsrc_get);
gst_pad_set_connect_function(videotestsrc->srcpad,gst_videotestsrc_srcconnect);
videotestsrc->width = 640;
videotestsrc->height = 480;
}
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->width*videotestsrc->height/2;
GST_DEBUG(0,"size=%ld %dx%d",newsize,
videotestsrc->width, videotestsrc->height);
buf = gst_buffer_new();
/* XXX this is wrong for anything but I420 */
GST_BUFFER_SIZE(buf) = newsize;
GST_BUFFER_DATA(buf) = g_malloc (newsize);
g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, NULL);
//GST_BUFFER_TIMESTAMP(buf) = GST_BUFFER_TIMESTAMP(buf);
gst_videotestsrc_random_yuv(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_METHOD:
src->method = g_value_get_enum (value);
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_METHOD:
g_value_set_enum (value, src->method);
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 (src_templ));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videotestsrc",
plugin_init
};
/* Non-GST specific stuff */
void
gst_videotestsrc_setup (GstVideotestsrc *v)
{
}
static void
random_chars(unsigned char *dest, int nbytes)
{
int i;
for(i=0;i<nbytes;i++){
dest[i] = random();
}
}
static int u_colors[] = { 128, 0, 192, 0, 255, 64, 255 };
static int v_colors[] = { 128, 192, 0, 0, 255, 255, 64 };
static void
gst_videotestsrc_random_yuv (GstVideotestsrc *v, unsigned char *dest, int w, int h)
{
unsigned char *up = dest + w*h;
unsigned char *vp = up + w*h/4;
int w7;
int i,j;
memset(dest,255,w*h/2);
random_chars(dest + w*h/2,w*h/2);
//random_chars(dest + w*h, w*h/4);
memset(dest + w*h, 128, w*h/4);
//random_chars(dest + w*h + w*h/4, w*h/4);
memset(dest + w*h + w*h/4, 128, w*h/4);
w7 = w/2/7 + 1;
for(i=0;i<7;i++){
for(j=0;j<w7;j++){
up[i*w7 + j] = u_colors[i];
vp[i*w7 + j] = v_colors[i];
}
}
for(i=0;i<h/4;i++){
memcpy(up+(w/2)*i, up, w/2);
memcpy(vp+(w/2)*i, vp, w/2);
}
}

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/* GStreamer
* Copyright (C) <2002> David A. Schleef <ds@schleef.org>
* 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.
*/
#ifndef __GST_VIDEOTESTSRC_H__
#define __GST_VIDEOTESTSRC_H__
#include <config.h>
#include <gst/gst.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_VIDEOTESTSRC \
(gst_videotestsrc_get_type())
#define GST_VIDEOTESTSRC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEOTESTSRC,GstVideotestsrc))
#define GST_VIDEOTESTSRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEOTESTSRC,GstVideotestsrc))
#define GST_IS_VIDEOTESTSRC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEOTESTSRC))
#define GST_IS_VIDEOTESTSRC_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEOTESTSRC))
typedef enum {
GST_VIDEOTESTSRC_POINT_SAMPLE,
GST_VIDEOTESTSRC_NEAREST,
GST_VIDEOTESTSRC_BILINEAR,
GST_VIDEOTESTSRC_BICUBIC
} GstVideoTestSrcMethod;
typedef struct _GstVideotestsrc GstVideotestsrc;
typedef struct _GstVideotestsrcClass GstVideotestsrcClass;
struct _GstVideotestsrc {
GstElement element;
GstPad *sinkpad,*srcpad;
/* video state */
guint32 format;
gint width;
gint height;
GstVideoTestSrcMethod method;
/* private */
guchar *temp;
};
struct _GstVideotestsrcClass {
GstElementClass parent_class;
};
GType gst_videotestsrc_get_type(void);
void gst_videotestsrc_setup(GstVideotestsrc *);
#define gst_videotestsrc_scale(scale, src, dest) (scale)->scale_cc((scale), (src), (dest))
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_VIDEOTESTSRC_H__ */