gstreamer/gst/videoscale/gstvideoscale.c
David Schleef 856cea1d53 Rewrote much of videoscale. Now handles most common YUV formats as well as 32 and 24 bit RGB. Only handles "nearest...
Original commit message from CVS:
Rewrote much of videoscale.  Now handles most common YUV formats
as well as 32 and 24 bit RGB.  Only handles "nearest" scaling.
2003-04-22 07:32:50 +00:00

475 lines
13 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 <gstvideoscale.h>
#include <videoscale.h>
/* elementfactory information */
static GstElementDetails videoscale_details = {
"Video scaler",
"Filter/Video",
"LGPL",
"Resizes video",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2000",
};
/* GstVideoscale signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_WIDTH,
ARG_HEIGHT,
ARG_METHOD,
/* FILL ME */
};
#define GST_TYPE_VIDEOSCALE_METHOD (gst_videoscale_method_get_type())
static GType
gst_videoscale_method_get_type (void)
{
static GType videoscale_method_type = 0;
static GEnumValue videoscale_methods[] = {
{ GST_VIDEOSCALE_POINT_SAMPLE, "0", "Point Sample" },
{ GST_VIDEOSCALE_NEAREST, "1", "Nearest" },
{ GST_VIDEOSCALE_BILINEAR, "2", "Bilinear" },
{ GST_VIDEOSCALE_BICUBIC, "3", "Bicubic" },
{ 0, NULL, NULL },
};
if (!videoscale_method_type) {
videoscale_method_type = g_enum_register_static ("GstVideoscaleMethod", videoscale_methods);
}
return videoscale_method_type;
}
static void gst_videoscale_class_init (GstVideoscaleClass *klass);
static void gst_videoscale_init (GstVideoscale *videoscale);
static void gst_videoscale_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_videoscale_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_videoscale_chain (GstPad *pad, GstBuffer *buf);
static GstCaps * gst_videoscale_get_capslist(void);
static GstElementClass *parent_class = NULL;
/*static guint gst_videoscale_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_videoscale_get_type (void)
{
static GType videoscale_type = 0;
if (!videoscale_type) {
static const GTypeInfo videoscale_info = {
sizeof(GstVideoscaleClass), NULL,
NULL,
(GClassInitFunc)gst_videoscale_class_init,
NULL,
NULL,
sizeof(GstVideoscale),
0,
(GInstanceInitFunc)gst_videoscale_init,
};
videoscale_type = g_type_register_static(GST_TYPE_ELEMENT, "GstVideoscale", &videoscale_info, 0);
}
return videoscale_type;
}
static void
gst_videoscale_class_init (GstVideoscaleClass *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_VIDEOSCALE_METHOD,0,G_PARAM_READWRITE)); /* CHECKME! */
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_videoscale_set_property;
gobject_class->get_property = gst_videoscale_get_property;
}
static GstPadTemplate *
gst_videoscale_src_template_factory(void)
{
static GstPadTemplate *templ = NULL;
if(!templ){
GstCaps *caps = GST_CAPS_NEW("src","video/raw",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT));
caps = gst_caps_intersect(caps, gst_videoscale_get_capslist ());
templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
}
return templ;
}
static GstPadTemplate *
gst_videoscale_sink_template_factory(void)
{
static GstPadTemplate *templ = NULL;
if(!templ){
GstCaps *caps = GST_CAPS_NEW("sink","video/raw",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT));
caps = gst_caps_intersect(caps, gst_videoscale_get_capslist ());
templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SINK, GST_PAD_ALWAYS, caps);
}
return templ;
}
static GstCaps *
gst_videoscale_get_capslist(void)
{
static GstCaps *capslist = NULL;
GstCaps *caps;
int i;
if (capslist){
gst_caps_ref(capslist);
return capslist;
}
for(i=0;i<videoscale_n_formats;i++){
caps = videoscale_get_caps(videoscale_formats + i);
capslist = gst_caps_append(capslist, caps);
}
gst_caps_ref(capslist);
return capslist;
}
static GstCaps *
gst_videoscale_getcaps (GstPad *pad, GstCaps *caps)
{
GstVideoscale *videoscale;
GstCaps *capslist = NULL;
GstCaps *peercaps;
GstCaps *sizecaps;
int i;
GST_DEBUG(0,"gst_videoscale_src_link");
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
/* get list of peer's caps */
if(pad == videoscale->srcpad){
peercaps = gst_pad_get_allowed_caps (videoscale->sinkpad);
}else{
peercaps = gst_pad_get_allowed_caps (videoscale->srcpad);
}
/* FIXME videoscale doesn't allow passthru of video formats it
* doesn't understand. */
/* Look through our list of caps and find those that match with
* the peer's formats. Create a list of them. */
for(i=0;i<videoscale_n_formats;i++){
GstCaps *fromcaps = videoscale_get_caps(videoscale_formats + i);
if(gst_caps_is_always_compatible(fromcaps, peercaps)){
capslist = gst_caps_append(capslist, fromcaps);
}
gst_caps_unref (fromcaps);
}
gst_caps_unref (peercaps);
sizecaps = GST_CAPS_NEW("videoscale_size","video/raw",
"width", GST_PROPS_INT_RANGE (0, G_MAXINT),
"height", GST_PROPS_INT_RANGE (0, G_MAXINT));
caps = gst_caps_intersect(caps, gst_videoscale_get_capslist ());
gst_caps_unref (sizecaps);
return caps;
}
static GstPadLinkReturn
gst_videoscale_src_link (GstPad *pad, GstCaps *caps)
{
GstVideoscale *videoscale;
GstPadLinkReturn ret;
GstCaps *peercaps;
GST_DEBUG(0,"gst_videoscale_src_link");
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_LINK_DELAYED;
}
videoscale->format = videoscale_find_by_caps (caps);
gst_caps_get_int (caps, "width", &videoscale->to_width);
gst_caps_get_int (caps, "height", &videoscale->to_height);
gst_videoscale_setup(videoscale);
GST_DEBUG(0,"width %d height %d",videoscale->to_width,videoscale->to_height);
peercaps = gst_caps_copy(caps);
gst_caps_set(peercaps, "width", GST_PROPS_INT_RANGE (0, G_MAXINT));
gst_caps_set(peercaps, "height", GST_PROPS_INT_RANGE (0, G_MAXINT));
ret = gst_pad_try_set_caps (videoscale->srcpad, peercaps);
gst_caps_unref(peercaps);
if(ret==GST_PAD_LINK_OK){
caps = gst_pad_get_caps (videoscale->srcpad);
gst_caps_get_int (caps, "width", &videoscale->from_width);
gst_caps_get_int (caps, "height", &videoscale->from_height);
gst_videoscale_setup(videoscale);
}
return ret;
}
static GstPadLinkReturn
gst_videoscale_sink_link (GstPad *pad, GstCaps *caps)
{
GstVideoscale *videoscale;
GstPadLinkReturn ret;
GstCaps *peercaps;
GST_DEBUG(0,"gst_videoscale_src_link");
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_LINK_DELAYED;
}
videoscale->format = videoscale_find_by_caps (caps);
gst_caps_get_int (caps, "width", &videoscale->from_width);
gst_caps_get_int (caps, "height", &videoscale->from_height);
gst_videoscale_setup(videoscale);
peercaps = gst_caps_copy(caps);
if(videoscale->force_size){
gst_caps_set(peercaps, "width", GST_PROPS_INT (videoscale->forced_width));
gst_caps_set(peercaps, "height", GST_PROPS_INT (videoscale->forced_height));
}else{
gst_caps_set(peercaps, "width", GST_PROPS_INT_RANGE (0, G_MAXINT));
gst_caps_set(peercaps, "height", GST_PROPS_INT_RANGE (0, G_MAXINT));
}
ret = gst_pad_try_set_caps (videoscale->srcpad, peercaps);
gst_caps_unref(peercaps);
if(ret==GST_PAD_LINK_OK){
caps = gst_pad_get_caps (videoscale->srcpad);
gst_caps_get_int (caps, "width", &videoscale->to_width);
gst_caps_get_int (caps, "height", &videoscale->to_height);
gst_videoscale_setup(videoscale);
}
return ret;
}
static void
gst_videoscale_init (GstVideoscale *videoscale)
{
GST_DEBUG(0,"gst_videoscale_init");
videoscale->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (gst_videoscale_sink_template_factory),
"sink");
gst_element_add_pad(GST_ELEMENT(videoscale),videoscale->sinkpad);
gst_pad_set_chain_function(videoscale->sinkpad,gst_videoscale_chain);
gst_pad_set_link_function(videoscale->sinkpad,gst_videoscale_sink_link);
gst_pad_set_getcaps_function(videoscale->sinkpad,gst_videoscale_getcaps);
videoscale->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (gst_videoscale_src_template_factory),
"src");
gst_element_add_pad(GST_ELEMENT(videoscale),videoscale->srcpad);
gst_pad_set_link_function(videoscale->srcpad,gst_videoscale_src_link);
gst_pad_set_getcaps_function(videoscale->srcpad,gst_videoscale_getcaps);
videoscale->inited = FALSE;
videoscale->force_size = FALSE;
videoscale->method = GST_VIDEOSCALE_NEAREST;
/*videoscale->method = GST_VIDEOSCALE_BILINEAR; */
/*videoscale->method = GST_VIDEOSCALE_POINT_SAMPLE; */
}
static void
gst_videoscale_chain (GstPad *pad, GstBuffer *buf)
{
GstVideoscale *videoscale;
guchar *data;
gulong size;
GstBuffer *outbuf;
GST_DEBUG (0,"gst_videoscale_chain");
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
g_return_if_fail (videoscale->inited);
data = GST_BUFFER_DATA(buf);
size = GST_BUFFER_SIZE(buf);
if(videoscale->passthru){
gst_pad_push(videoscale->srcpad, buf);
return;
}
GST_DEBUG (0,"gst_videoscale_chain: got buffer of %ld bytes in '%s'",size,
GST_OBJECT_NAME (videoscale));
GST_DEBUG(0,"size=%ld from=%dx%d to=%dx%d fromsize=%ld (should be %d) tosize=%d",
size,
videoscale->from_width, videoscale->from_height,
videoscale->to_width, videoscale->to_height,
size, videoscale->from_buf_size,
videoscale->to_buf_size);
g_return_if_fail (size == videoscale->from_buf_size);
outbuf = gst_buffer_new();
/* FIXME: handle bufferpools */
GST_BUFFER_SIZE(outbuf) = videoscale->to_buf_size;
GST_BUFFER_DATA(outbuf) = g_malloc (videoscale->to_buf_size);
GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
g_return_if_fail(videoscale->format);
GST_DEBUG (0,"format %s",videoscale->format->fourcc);
g_return_if_fail(videoscale->format->scale);
videoscale->format->scale(videoscale, GST_BUFFER_DATA(outbuf), data);
GST_DEBUG (0,"gst_videoscale_chain: pushing buffer of %d bytes in '%s'",GST_BUFFER_SIZE(outbuf),
GST_OBJECT_NAME (videoscale));
gst_pad_push(videoscale->srcpad, outbuf);
gst_buffer_unref(buf);
}
static void
gst_videoscale_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstVideoscale *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOSCALE(object));
src = GST_VIDEOSCALE(object);
GST_DEBUG(0,"gst_videoscale_set_property");
switch (prop_id) {
case ARG_WIDTH:
src->forced_width = g_value_get_int (value);
src->force_size = TRUE;
break;
case ARG_HEIGHT:
src->forced_height = g_value_get_int (value);
src->force_size = TRUE;
break;
case ARG_METHOD:
src->method = g_value_get_enum (value);
break;
default:
break;
}
}
static void
gst_videoscale_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstVideoscale *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOSCALE(object));
src = GST_VIDEOSCALE(object);
switch (prop_id) {
case ARG_WIDTH:
g_value_set_int (value, src->forced_width);
break;
case ARG_HEIGHT:
g_value_set_int (value, src->forced_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 videoscale element */
factory = gst_element_factory_new("videoscale",GST_TYPE_VIDEOSCALE,
&videoscale_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (gst_videoscale_sink_template_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (gst_videoscale_src_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videoscale",
plugin_init
};