FaSTTUBe/GST-Tensordecoder-ov_ep
37
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Wiki Activity

Initial revision

Browse Source 
Original commit message from CVS:
Initial revision
This commit is contained in:
Andy Wingo 2001-12-22 23:27:17 +00:00
parent fec81a298a
commit 92d4e11782
12 changed files with 1510 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gst/videoscale/.gitignore vendored Normal file
View File

@ -0,0 +1,7 @@
Makefile
Makefile.in
*.o
*.lo
*.la
.deps
.libs

20
gst/videoscale/Makefile.am Normal file
View File

@ -0,0 +1,20 @@
filterdir = $(libdir)/gst
filter_LTLIBRARIES = libgstvideoscale.la
if HAVE_CPU_I386
ARCHSRCS = \
videoscale_x86.c \
videoscale_x86_asm.s
else
ARCHSRCS =
endif
libgstvideoscale_la_SOURCES = \
gstvideoscale.c \
videoscale.c \
$(ARCHSRCS)
libvideoscale_la_CFLAGS = -O2 $(FOMIT_FRAME_POINTER) -funroll-all-loops -finline-functions -ffast-math $(GST_CFLAGS)
noinst_HEADERS = gstvideoscale.h videoscale_x86.h

355
gst/videoscale/gstvideoscale.c Normal file
View File

@ -0,0 +1,355 @@
/* Gnome-Streamer
* 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>
/* elementfactory information */
static GstElementDetails videoscale_details = {
"Video scaler",
"Filter/Video/Scaler",
"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 */
};
GST_PADTEMPLATE_FACTORY (sink_templ,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"videoscale_caps",
"video/raw",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0'))
)
)
GST_PADTEMPLATE_FACTORY (src_templ,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"videoscale_caps",
"video/raw",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0'))
)
)
#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 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 GstPadNegotiateReturn
videoscale_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
{
GstVideoscale *videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
GST_DEBUG(0,"videoscale_negotiate_src\n");
if(*caps==NULL){
return GST_PAD_NEGOTIATE_FAIL;
}
*caps = GST_CAPS_NEW ( "videoscale_caps",
"video/raw",
"format", GST_PROPS_FOURCC (videoscale->format),
"width", GST_PROPS_INT (videoscale->targetwidth),
"height", GST_PROPS_INT (videoscale->targetheight)
);
return GST_PAD_NEGOTIATE_AGREE;
}
static GstPadNegotiateReturn
videoscale_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
{
GST_DEBUG(0,"videoscale_negotiate_sink\n");
if (*caps==NULL)
return GST_PAD_NEGOTIATE_FAIL;
return GST_PAD_NEGOTIATE_AGREE;
}
static void
gst_videoscale_newcaps (GstPad *pad, GstCaps *caps)
{
GstVideoscale *videoscale;
GST_DEBUG(0,"gst_videoscale_newcaps\n");
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
videoscale->width = gst_caps_get_int (caps, "width");
videoscale->height = gst_caps_get_int (caps, "height");
videoscale->format = gst_caps_get_int (caps, "format");
gst_videoscale_setup(videoscale);
GST_DEBUG (0,"target size %d x %d\n",videoscale->targetwidth,
videoscale->targetheight);
GST_DEBUG(0,"width %d\n",videoscale->targetwidth);
gst_pad_set_caps (videoscale->srcpad,
GST_CAPS_NEW (
"videoscale_src",
"video/raw",
"format", GST_PROPS_FOURCC (videoscale->format),
"width", GST_PROPS_INT (videoscale->targetwidth),
"height", GST_PROPS_INT (videoscale->targetheight)
));
}
static void
gst_videoscale_init (GstVideoscale *videoscale)
{
GST_DEBUG(0,"gst_videoscale_init\n");
videoscale->sinkpad = gst_pad_new_from_template (
GST_PADTEMPLATE_GET (sink_templ), "sink");
gst_pad_set_negotiate_function(videoscale->sinkpad,videoscale_negotiate_sink);
gst_element_add_pad(GST_ELEMENT(videoscale),videoscale->sinkpad);
gst_pad_set_chain_function(videoscale->sinkpad,gst_videoscale_chain);
gst_pad_set_newcaps_function(videoscale->sinkpad,gst_videoscale_newcaps);
videoscale->srcpad = gst_pad_new_from_template (
GST_PADTEMPLATE_GET (src_templ), "src");
gst_pad_set_negotiate_function(videoscale->srcpad,videoscale_negotiate_src);
gst_element_add_pad(GST_ELEMENT(videoscale),videoscale->srcpad);
videoscale->targetwidth = -1;
videoscale->targetheight = -1;
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\n");
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));
data = GST_BUFFER_DATA(buf);
size = GST_BUFFER_SIZE(buf);
if(!videoscale->scale_cc){
videoscale->format = gst_caps_get_int (gst_pad_get_caps(pad), "format");
gst_videoscale_setup(videoscale);
}
GST_DEBUG (0,"gst_videoscale_chain: got buffer of %ld bytes in '%s'\n",size,
GST_OBJECT_NAME (videoscale));
GST_DEBUG(0,"size=%ld from=%dx%d to=%dx%d newsize=%d\n",
size,
videoscale->width, videoscale->height,
videoscale->targetwidth, videoscale->targetheight,
videoscale->targetwidth*videoscale->targetheight + videoscale->targetwidth*videoscale->targetheight/2);
outbuf = gst_buffer_new();
/* XXX this is wrong for anything but I420 */
GST_BUFFER_SIZE(outbuf) = videoscale->targetwidth*videoscale->targetheight +
videoscale->targetwidth*videoscale->targetheight/2;
GST_BUFFER_DATA(outbuf) = g_malloc (videoscale->targetwidth*videoscale->targetheight*2);
GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
//g_return_if_fail(videoscale->scale_cc != NULL);
videoscale->scale_cc(videoscale, data, GST_BUFFER_DATA(outbuf));
GST_DEBUG (0,"gst_videoscale_chain: pushing buffer of %d bytes in '%s'\n",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\n");
switch (prop_id) {
case ARG_WIDTH:
src->targetwidth = g_value_get_int (value);
break;
case ARG_HEIGHT:
src->targetheight = g_value_get_int (value);
break;
case ARG_METHOD:
src->method = g_value_get_int (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->targetwidth);
break;
case ARG_HEIGHT:
g_value_set_int (value, src->targetheight);
break;
case ARG_METHOD:
g_value_set_int (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_elementfactory_new("videoscale",GST_TYPE_VIDEOSCALE,
&videoscale_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (sink_templ));
gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (src_templ));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videoscale",
plugin_init
};

91
gst/videoscale/gstvideoscale.h Normal file
View File

@ -0,0 +1,91 @@
/* Gnome-Streamer
* 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_VIDEOSCALE_H__
#define __GST_VIDEOSCALE_H__
#include <config.h>
#include <gst/gst.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_VIDEOSCALE \
(gst_videoscale_get_type())
#define GST_VIDEOSCALE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEOSCALE,GstVideoscale))
#define GST_VIDEOSCALE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEOSCALE,GstVideoscale))
#define GST_IS_VIDEOSCALE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEOSCALE))
#define GST_IS_VIDEOSCALE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEOSCALE))
typedef enum {
GST_VIDEOSCALE_POINT_SAMPLE,
GST_VIDEOSCALE_NEAREST,
GST_VIDEOSCALE_BILINEAR,
GST_VIDEOSCALE_BICUBIC
} GstVideoScaleMethod;
typedef struct _GstVideoscale GstVideoscale;
typedef struct _GstVideoscaleClass GstVideoscaleClass;
struct _GstVideoscale {
GstElement element;
GstPad *sinkpad,*srcpad;
// video state
gint format;
gint width;
gint height;
gint targetwidth;
gint targetheight;
GstVideoScaleMethod method;
guint scale_bytes;
/* private */
guchar *temp;
void (*scale_cc) (GstVideoscale *scale, guchar *src, guchar *dest);
void (*scaler) (GstVideoscale *scale, guchar *src, guchar *dest,int,int,int,int);
guchar (*filter) (guchar *src, gdouble x, gdouble y, gint sw, gint sh);
guchar copy_row[8192];
};
struct _GstVideoscaleClass {
GstElementClass parent_class;
};
GType gst_videoscale_get_type(void);
void gst_videoscale_setup(GstVideoscale *);
#define gst_videoscale_scale(scale, src, dest) (scale)->scale_cc((scale), (src), (dest))
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_VIDEOSCALE_H__ */

370
gst/videoscale/videoscale.c Normal file
View File

@ -0,0 +1,370 @@
/* Gnome-Streamer
* 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 <stdlib.h>
#include <math.h>
#include "config.h"
#include "gstvideoscale.h"
#undef HAVE_CPU_I386
#ifdef HAVE_CPU_I386
#include "videoscale_x86.h"
#endif
static void gst_videoscale_scale_yuv (Videoscale *scale, unsigned char *src, unsigned char *dest);
static void gst_videoscale_scale_rgb (Videoscale *scale, unsigned char *src, unsigned char *dest);
/* scalers */
static void gst_videoscale_scale_nearest (Videoscale *scale, unsigned char *src, unsigned char *dest,
int sw, int sh, int dw, int dh);
static void gst_videoscale_scale_plane_slow (Videoscale *scale, unsigned char *src, unsigned char *dest,
int sw, int sh, int dw, int dh);
static void gst_videoscale_scale_point_sample (Videoscale *scale, unsigned char *src, unsigned char *dest,
int sw, int sh, int dw, int dh);
/* filters */
static unsigned char gst_videoscale_bilinear (unsigned char *src, double x, double y, int sw, int sh);
static unsigned char gst_videoscale_bicubic (unsigned char *src, double x, double y, int sw, int sh);
void
gst_videoscale_setup (Videoscale *scale)
{
switch (scale->format) {
case GST_MAKE_FOURCC('I','4','2','0'):
scale->scale_cc = gst_videoscale_scale_yuv;
scale->scale_bytes = 1;
break;
case GST_MAKE_FOURCC('R','G','B',' '):
scale->scale_cc = gst_videoscale_scale_rgb;
/* XXX */
//scale->scale_bytes = gst_caps_get_int(scale->srcpad->caps,"bpp")/8;
break;
default:
g_print("videoscale: unsupported video format %08x\n", scale->format);
return; /* XXX */
}
switch (scale->method) {
case GST_VIDEOSCALE_POINT_SAMPLE:
scale->scaler = gst_videoscale_scale_point_sample;
GST_DEBUG (0,"videoscale: scaling method POINT_SAMPLE\n");
break;
case GST_VIDEOSCALE_NEAREST:
#ifdef HAVE_CPU_I386
gst_videoscale_generate_rowbytes_x86 (scale->copy_row, scale->width,
scale->targetwidth, scale->scale_bytes);
scale->scaler = gst_videoscale_scale_nearest_x86;
#else
scale->scaler = gst_videoscale_scale_nearest;
#endif
GST_DEBUG (0,"videoscale: scaling method NEAREST\n");
break;
case GST_VIDEOSCALE_BILINEAR:
scale->scaler = gst_videoscale_scale_plane_slow;
scale->filter = gst_videoscale_bilinear;
GST_DEBUG (0,"videoscale: scaling method BILINEAR\n");
break;
case GST_VIDEOSCALE_BICUBIC:
scale->scaler = gst_videoscale_scale_plane_slow;
scale->filter = gst_videoscale_bicubic;
GST_DEBUG (0,"videoscale: scaling method BICUBIC\n");
break;
default:
g_print("videoscale: unsupported scaling method %d\n", scale->method);
return; /* XXX */
}
return; /* XXX */
}
static void
gst_videoscale_scale_rgb (Videoscale *scale, unsigned char *src, unsigned char *dest)
{
int sw = scale->width;
int sh = scale->height;
int dw = scale->targetwidth;
int dh = scale->targetheight;
GST_DEBUG (0,"videoscale: scaling RGB %dx%d to %dx%d\n", sw, sh, dw, dh);
switch (scale->scale_bytes) {
case 2:
dw = ((dw + 1) & ~1) << 1;
sw = sw<<1;
break;
case 4:
dw = ((dw + 2) & ~3) << 2;
sw = sw<<2;
break;
default:
break;
}
GST_DEBUG (0,"videoscale: %p %p\n", src, dest);
scale->scaler(scale, src, dest, sw, sh, dw, dh);
}
static void
gst_videoscale_scale_yuv (Videoscale *scale, unsigned char *src, unsigned char *dest)
{
int sw = scale->width;
int sh = scale->height;
int dw = scale->targetwidth;
int dh = scale->targetheight;
GST_DEBUG (0,"videoscale: scaling YUV420P %dx%d to %dx%d\n", sw, sh, dw, dh);
scale->scaler(scale, src, dest, sw, sh, dw, dh);
src += sw*sh;
dest += dw*dh;
dh = dh>>1;
dw = dw>>1;
sh = sh>>1;
sw = sw>>1;
scale->scaler(scale, src, dest, sw, sh, dw, dh);
src += sw*sh;
dest += dw*dh;
scale->scaler(scale, src, dest, sw, sh, dw, dh);
}
#define RC(x,y) *(src+(int)(x)+(int)((y)*sw))
static unsigned char
gst_videoscale_bilinear (unsigned char *src, double x, double y, int sw, int sh)
{
int j=floor(x);
int k=floor(y);
double a=x-j;
double b=y-k;
double dest;
int color;
GST_DEBUG(0,"videoscale: scaling bilinear %f %f %dx%d\n", x, y, sw, sh);
dest=(1-a)*(1-b)*RC(j,k)+
a*(1-b)*RC(j+1,k);
k = MIN(sh-1, k);
dest+= b*(1-a)*RC(j,k+1)+
a*b*RC(j+1,k+1);
color=rint(dest);
if (color<0) color=abs(color); // cannot have negative values !
//if (color<0) color=0; // cannot have negative values !
if (color>255) color=255;
return (unsigned char) color;
}
static unsigned char
gst_videoscale_bicubic (unsigned char *src, double x, double y, int sw, int sh)
{
int j=floor(x);
int k=floor(y), k2;
double a=x-j;
double b=y-k;
double dest;
int color;
double t1, t2, t3, t4;
double a1, a2, a3, a4;
GST_DEBUG (0,"videoscale: scaling bicubic %dx%d\n", sw, sh);
a1 = -a*(1-a)*(1-a);
a2 = (1-2*a*a+a*a*a);
a3 = a*(1+a-a*a);
a4 = a*a*(1-a);
k2 = MAX(0, k-1);
t1=a1*RC(j-1,k2)+ a2*RC(j,k2)+ a3*RC(j+1,k2)- a4*RC(j+2,k2);
t2=a1*RC(j-1,k)+ a2*RC(j,k)+ a3*RC(j+1,k)- a4*RC(j+2,k);
k2 = MIN(sh, k+1);
t3=a1*RC(j-1,k2)+ a2*RC(j,k2)+ a3*RC(j+1,k2)- a4*RC(j+2,k2);
k2 = MIN(sh, k+2);
t4=a1*RC(j-1,k2)+ a2*RC(j,k2)+ a3*RC(j+1,k2)- a4*RC(j+2,k2);
dest= -b*(1-b)*(1-b)*t1+ (1-2*b*b+b*b*b)*t2+ b*(1+b-b*b)*t3+ b*b*(b-1)*t4;
color=rint(dest);
if (color<0) color=abs(color); // cannot have negative values !
if (color>255) color=255;
return (unsigned char) color;
}
static void
gst_videoscale_scale_plane_slow (Videoscale *scale, unsigned char *src, unsigned char *dest,
int sw, int sh, int dw, int dh)
{
double zoomx = ((double)dw)/(double)sw;
double zoomy = ((double)dh)/(double)sh;
double xr, yr;
int x, y;
GST_DEBUG (0,"videoscale: scale plane slow %dx%d %dx%d %g %g %p %p\n", sw, sh, dw, dh, zoomx, zoomy, src, dest);
for (y=0; y<dh; y++) {
yr = ((double)y)/zoomy;
for (x=0; x<dw; x++) {
xr = ((double)x)/zoomx;
GST_DEBUG (0,"videoscale: scale plane slow %g %g %p\n", xr, yr, (src+(int)(x)+(int)((y)*sw)));
if (floor(xr) == xr && floor(yr) == yr){
GST_DEBUG (0,"videoscale: scale plane %g %g %p %p\n", xr, yr, (src+(int)(x)+(int)((y)*sw)), dest);
*dest++ = RC(xr, yr);
}
else {
*dest++ = scale->filter(src, xr, yr, sw, sh);
//*dest++ = gst_videoscale_bicubic(src, xr, yr, sw, sh);
}
}
}
}
static void
gst_videoscale_scale_point_sample (Videoscale *scale, unsigned char *src, unsigned char *dest,
int sw, int sh, int dw, int dh)
{
int ypos, yinc, y;
int xpos, xinc, x;
int sum, xcount, ycount, loop;
unsigned char *srcp, *srcp2;
GST_DEBUG (0,"videoscale: scaling nearest point sample %p %p %d\n", src, dest, dw);
ypos = 0x10000;
yinc = (sh<<16)/dh;
xinc = (sw<<16)/dw;
for (y = dh; y; y--) {
ycount = 1;
srcp = src;
while (ypos >0x10000) {
ycount++;
ypos-=0x10000;
src += sw;
}
xpos = 0x10000;
for ( x=dw; x; x-- ) {
xcount = 0;
sum=0;
while ( xpos >= 0x10000L ) {
loop = ycount;
srcp2 = srcp;
while (loop--) {
sum += *srcp2;
srcp2 += sw;
}
srcp++;
xcount++;
xpos -= 0x10000L;
}
*dest++ = sum/(xcount*ycount);
xpos += xinc;
}
ypos += yinc;
}
}
static void
gst_videoscale_scale_nearest (Videoscale *scale,
unsigned char *src,
unsigned char *dest,
int sw, int sh, int dw, int dh)
{
int ypos, yinc, y;
int xpos, xinc, x;
GST_DEBUG (0, "videoscale: scaling nearest %p %p %d %d\n", src, dest, dw, scale->scale_bytes);
ypos = 0x10000;
yinc = (sh<<16)/dh;
xinc = (sw<<16)/dw;
for (y = dh; y; y--) {
while (ypos >0x10000) {
ypos-=0x10000;
src += sw;
}
xpos = 0x10000;
switch (scale->scale_bytes) {
case 4:
{
guint32 *destp = (guint32 *)dest;
guint32 *srcp = (guint32 *)src;
for ( x=dw>>2; x; x-- ) {
while ( xpos >= 0x10000L ) {
srcp++;
xpos -= 0x10000L;
}
*destp++ = *srcp;
xpos += xinc;
}
break;
}
case 2:
{
guint16 *destp = (guint16 *)dest;
guint16 *srcp = (guint16 *)src;
for ( x=dw>>1; x; x-- ) {
while ( xpos >= 0x10000L ) {
srcp++;
xpos -= 0x10000L;
}
*destp++ = *srcp;
xpos += xinc;
}
break;
}
case 1:
{
guchar *destp = dest;
guchar *srcp = src;
for ( x=dw; x; x-- ) {
while ( xpos >= 0x10000L ) {
srcp++;
xpos -= 0x10000L;
}
*destp++ = *srcp;
xpos += xinc;
}
}
}
dest += dw;
ypos += yinc;
}
}

80
gst/videoscale/videoscale_x86.c Normal file
View File

@ -0,0 +1,80 @@
/* Gnome-Streamer
* 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"
/* scalers */
void gst_videoscale_generate_rowbytes_x86 (unsigned char *copy_row, int src_w, int dst_w, int bpp);
void gst_videoscale_scale_nearest_x86 (Videoscale *scale,
unsigned char *src, unsigned char *dest,
int sw, int sh, int dw, int dh);
#define PREFIX16 0x66
#define STORE_BYTE 0xAA
#define STORE_WORD 0xAB
#define LOAD_BYTE 0xAC
#define LOAD_WORD 0xAD
#define RETURN 0xC3
void
gst_videoscale_generate_rowbytes_x86 (unsigned char *copy_row, int src_w, int dst_w, int bpp)
{
int i;
int pos, inc;
unsigned char *eip;
unsigned char load, store;
GST_DEBUG (0,"videoscale: setup scaling %p\n", copy_row);
switch (bpp) {
case 1:
load = LOAD_BYTE;
store = STORE_BYTE;
break;
case 2:
case 4:
load = LOAD_WORD;
store = STORE_WORD;
break;
default:
return;
}
pos = 0x10000;
inc = (src_w << 16) / dst_w;
eip = copy_row;
for ( i=0; i<dst_w; ++i ) {
while ( pos >= 0x10000L ) {
if ( bpp == 2 ) {
*eip++ = PREFIX16;
}
*eip++ = load;
pos -= 0x10000L;
}
if ( bpp == 2 ) {
*eip++ = PREFIX16;
}
*eip++ = store;
pos += inc;
}
*eip++ = RETURN;
GST_DEBUG (0,"scaler start/end %p %p %p\n", copy_row, eip, (void*)(eip-copy_row));
}

30
gst/videoscale/videoscale_x86.h Normal file
View File

@ -0,0 +1,30 @@
/* Gnome-Streamer
* 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_VIDEOSCALE__X86_H__
#define __GST_VIDEOSCALE__X86_H__
/* scalers */
void gst_videoscale_generate_rowbytes_x86 (unsigned char *copy_row, int src_w, int dst_w, int bpp);
void gst_videoscale_scale_nearest_x86 (GstVideoscale *scale,
unsigned char *src, unsigned char *dest,
int sw, int sh, int dw, int dh);
#endif /* __GST_VIDEOSCALE__X86_H__ */

53
gst/videoscale/videoscale_x86_asm.s Normal file
View File

@ -0,0 +1,53 @@
.text
.align 4
.globl gst_videoscale_scale_nearest_x86
.type gst_videoscale_scale_nearest_x86,@function
gst_videoscale_scale_nearest_x86:
subl $8,%esp
pushl %ebp
pushl %edi
pushl %esi
movl 28(%esp),%ebp
movl 24(%esp),%edx
addl $28,%edx
movl 24(%esp),%eax
movl %edx,8220(%eax)
movl $65536,12(%esp)
movl 40(%esp),%ecx
sall $16,%ecx
movl %ecx,%eax
cltd
idivl 48(%esp)
movl %eax,%ecx
movl 48(%esp),%eax
movl %eax,16(%esp)
testl %eax,%eax
jle .L92
jmp .L100
.p2align 4,,7
.L97:
addl 36(%esp),%ebp
addl $-65536,12(%esp)
.L100:
cmpl $65536,12(%esp)
jg .L97
movl 32(%esp),%edi
movl %ebp,%esi
movl 24(%esp),%edx
movl 8220(%edx), %eax
call *%eax
movl 44(%esp),%eax
addl %eax,32(%esp)
addl %ecx,12(%esp)
decl 16(%esp)
cmpl $0,16(%esp)
jg .L100
.L92:
popl %esi
popl %edi
popl %ebp
addl $8,%esp
ret

8
gst/volume/Makefile.am Normal file
View File

@ -0,0 +1,8 @@
filterdir = $(libdir)/gst
filter_LTLIBRARIES = libgstvolume.la
libgstvolume_la_SOURCES = gstvolume.c
libgstvolume_la_CFLAGS = $(GST_CFLAGS)
noinst_HEADERS = gstvolume.h filter.func

25
gst/volume/filter.func Normal file
View File

@ -0,0 +1,25 @@
{
guint j;
gint16 vol_i = filter->volume_i;
gfloat vol_f = filter->volume_f;
switch (filter->format) {
case GST_VOLUME_FORMAT_INT:
if (filter->muted) vol_i = 0;
for (j = 0; j < num_samples; j++) {
data[j] = (gint16) (((gint32)vol_i) * ((gint32)data[j]) / 8192);
}
break;
case GST_VOLUME_FORMAT_FLOAT:
if (filter->muted) vol_f = 0;
for (j = 0; j < num_samples; j++) {
data[j] *= vol_f;
}
break;
default:
g_warning("volume: filter.func: no format, aborting");
break;
}
}

373
gst/volume/gstvolume.c Normal file
View File

@ -0,0 +1,373 @@
/* -*- c-basic-offset: 2 -*-
* GStreamer
* Copyright (C) 1999-2001 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.
*/
#include <string.h>
#include <gst/gst.h>
#include <libs/audio/gstaudio.h>
#include "gstvolume.h"
static GstElementDetails volume_details = {
"Volume",
"Filter/Effect",
"Set volume on audio/raw streams",
VERSION,
"Andy Wingo <apwingo@eos.ncsu.edu>",
"(C) 2001"
};
/* Filter signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_SILENT,
ARG_MUTED,
ARG_VOLUME
};
static GstPadTemplate*
volume_sink_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template) {
template = gst_padtemplate_new
("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_caps_append(gst_caps_new ("sink_int", "audio/raw",
GST_AUDIO_INT_PAD_TEMPLATE_PROPS),
gst_caps_new ("sink_float", "audio/raw",
GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS)),
NULL);
}
return template;
}
static GstPadTemplate*
volume_src_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template)
template = gst_padtemplate_new
("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_caps_append (gst_caps_new ("src_float", "audio/raw",
GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS),
gst_caps_new ("src_int", "audio/raw",
GST_AUDIO_INT_PAD_TEMPLATE_PROPS)),
NULL);
return template;
}
static void volume_class_init (GstVolumeClass *klass);
static void volume_init (GstVolume *filter);
static void volume_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void volume_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static gint volume_parse_caps (GstVolume *filter, GstCaps *caps);
static void volume_chain (GstPad *pad, GstBuffer *buf);
static void inline volume_fast_float_chain (gfloat* data, guint numsamples, GstVolume *filter);
static void inline volume_fast_8bit_chain (gint8* data, guint numsamples, GstVolume *filter);
static void inline volume_fast_16bit_chain (gint16* data, guint numsamples, GstVolume *filter);
static GstElementClass *parent_class = NULL;
//static guint gst_filter_signals[LAST_SIGNAL] = { 0 };
static GstBufferPool*
volume_get_bufferpool (GstPad *pad)
{
GstVolume *filter;
filter = GST_VOLUME (gst_pad_get_parent (pad));
return gst_pad_get_bufferpool (filter->srcpad);
}
static GstPadNegotiateReturn
volume_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data)
{
GstVolume* filter = GST_VOLUME (gst_pad_get_parent (pad));
if (*caps==NULL)
return GST_PAD_NEGOTIATE_FAIL;
if (volume_parse_caps(filter, *caps))
return GST_PAD_NEGOTIATE_FAIL;
return gst_pad_negotiate_proxy(pad,filter->sinkpad,caps);
}
static GstPadNegotiateReturn
volume_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data)
{
GstVolume* filter = GST_VOLUME (gst_pad_get_parent (pad));
if (*caps==NULL)
return GST_PAD_NEGOTIATE_FAIL;
if (volume_parse_caps(filter, *caps))
return GST_PAD_NEGOTIATE_FAIL;
return gst_pad_negotiate_proxy(pad,filter->srcpad,caps);
}
static gint
volume_parse_caps (GstVolume *filter, GstCaps *caps)
{
const gchar *format;
g_return_val_if_fail(filter!=NULL,-1);
g_return_val_if_fail(caps!=NULL,-1);
format = gst_caps_get_string(caps, "format");
filter->rate = gst_caps_get_int (caps, "rate");
filter->channels = gst_caps_get_int (caps, "channels");
if (strcmp(format, "int")==0) {
filter->format = GST_VOLUME_FORMAT_INT;
filter->width = gst_caps_get_int (caps, "width");
filter->depth = gst_caps_get_int (caps, "depth");
filter->law = gst_caps_get_int (caps, "law");
filter->endianness = gst_caps_get_int (caps, "endianness");
filter->is_signed = gst_caps_get_int (caps, "signed");
if (!filter->silent) {
g_print ("Volume : channels %d, rate %d\n",
filter->channels, filter->rate);
g_print ("Volume : format int, bit width %d, endianness %d, signed %s\n",
filter->width, filter->endianness, filter->is_signed ? "yes" : "no");
}
} else if (strcmp(format, "float")==0) {
filter->format = GST_VOLUME_FORMAT_FLOAT;
filter->layout = gst_caps_get_string(caps, "layout");
filter->intercept = gst_caps_get_float(caps, "intercept");
filter->slope = gst_caps_get_float(caps, "slope");
if (!filter->silent) {
g_print ("Volume : channels %d, rate %d\n",
filter->channels, filter->rate);
g_print ("Volume : format float, layout %s, intercept %f, slope %f\n",
filter->layout, filter->intercept, filter->slope);
}
} else {
return -1;
}
return 0;
}
GType
gst_volume_get_type(void) {
static GType volume_type = 0;
if (!volume_type) {
static const GTypeInfo volume_info = {
sizeof(GstVolumeClass), NULL,
NULL,
(GClassInitFunc)volume_class_init,
NULL,
NULL,
sizeof(GstVolume),
0,
(GInstanceInitFunc)volume_init,
};
volume_type = g_type_register_static(GST_TYPE_ELEMENT, "GstVolume", &volume_info, 0);
}
return volume_type;
}
static void
volume_class_init (GstVolumeClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SILENT,
g_param_spec_boolean("silent","silent","silent",
TRUE,G_PARAM_READWRITE)); // CHECKME
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_MUTED,
g_param_spec_boolean("muted","muted","muted",
FALSE,G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_VOLUME,
g_param_spec_float("volume","volume","volume",
-4.0,4.0,1.0,G_PARAM_READWRITE));
gobject_class->set_property = volume_set_property;
gobject_class->get_property = volume_get_property;
}
static void
volume_init (GstVolume *filter)
{
filter->sinkpad = gst_pad_new_from_template(volume_sink_factory (),"sink");
gst_pad_set_negotiate_function(filter->sinkpad,volume_negotiate_sink);
gst_pad_set_bufferpool_function(filter->sinkpad,volume_get_bufferpool);
filter->srcpad = gst_pad_new_from_template(volume_src_factory (),"src");
gst_pad_set_negotiate_function(filter->srcpad,volume_negotiate_src);
gst_element_add_pad(GST_ELEMENT(filter),filter->sinkpad);
gst_element_add_pad(GST_ELEMENT(filter),filter->srcpad);
gst_pad_set_chain_function(filter->sinkpad,volume_chain);
filter->silent = FALSE;
filter->muted = FALSE;
filter->volume_i = 8192;
filter->volume_f = 1.0;
}
static void
volume_chain (GstPad *pad, GstBuffer *buf)
{
GstVolume *filter;
gint16 *int_data;
gfloat *float_data;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
g_return_if_fail(buf != NULL);
filter = GST_VOLUME(GST_OBJECT_PARENT (pad));
g_return_if_fail(filter != NULL);
g_return_if_fail(GST_IS_VOLUME(filter));
switch (filter->format) {
case GST_VOLUME_FORMAT_INT:
int_data = (gint16 *)GST_BUFFER_DATA(buf);
switch (filter->width) {
case 16:
volume_fast_16bit_chain(int_data,GST_BUFFER_SIZE(buf)/2, filter);
break;
case 8:
volume_fast_8bit_chain((gint8*)int_data,GST_BUFFER_SIZE(buf), filter);
break;
}
break;
case GST_VOLUME_FORMAT_FLOAT:
float_data = (gfloat *)GST_BUFFER_DATA(buf);
volume_fast_float_chain(float_data,GST_BUFFER_SIZE(buf)/sizeof(float), filter);
break;
}
gst_pad_push(filter->srcpad,buf);
}
static void inline
volume_fast_float_chain(gfloat* data, guint num_samples, GstVolume *filter)
#include "filter.func"
static void inline
volume_fast_16bit_chain(gint16* data, guint num_samples, GstVolume *filter)
#include "filter.func"
static void inline
volume_fast_8bit_chain(gint8* data, guint num_samples, GstVolume *filter)
#include "filter.func"
static void
volume_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstVolume *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VOLUME(object));
filter = GST_VOLUME(object);
switch (prop_id)
{
case ARG_SILENT:
filter->silent = g_value_get_boolean (value);
break;
case ARG_MUTED:
filter->muted = g_value_get_boolean (value);
break;
case ARG_VOLUME:
filter->volume_f = g_value_get_float (value);
filter->volume_i = filter->volume_f*8192;
break;
default:
break;
}
}
static void
volume_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstVolume *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VOLUME(object));
filter = GST_VOLUME(object);
switch (prop_id) {
case ARG_SILENT:
g_value_set_boolean (value, filter->silent);
break;
case ARG_MUTED:
g_value_set_boolean (value, filter->muted);
break;
case ARG_VOLUME:
g_value_set_float (value, filter->volume_f);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_elementfactory_new("volume",GST_TYPE_VOLUME,
&volume_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_elementfactory_add_padtemplate (factory, volume_src_factory ());
gst_elementfactory_add_padtemplate (factory, volume_sink_factory ());
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"volume",
plugin_init
};

98
gst/volume/gstvolume.h Normal file
View File

@ -0,0 +1,98 @@
/* -*- c-basic-offset: 2 -*-
* 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.
*/
#ifndef __GST_VOLUME_H__
#define __GST_VOLUME_H__
#include <config.h>
#include <gst/gst.h>
// #include <gst/meta/audioraw.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_VOLUME \
(gst_volume_get_type())
#define GST_VOLUME(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VOLUME,GstVolume))
#define GST_VOLUME_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ULAW,GstVolume))
#define GST_IS_VOLUME(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VOLUME))
#define GST_IS_VOLUME_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VOLUME))
typedef struct _GstVolume GstVolume;
typedef struct _GstVolumeClass GstVolumeClass;
typedef enum _GstVolumeFormat GstVolumeFormat;
enum _GstVolumeFormat {
GST_VOLUME_FORMAT_INT=1,
GST_VOLUME_FORMAT_FLOAT
};
struct _GstVolume {
GstElement element;
GstPad *sinkpad, *srcpad;
gboolean silent;
gboolean muted;
gint16 volume_i;
gfloat volume_f;
/* the next three are valid for both int and float */
GstVolumeFormat format;
guint rate;
guint channels;
/* the next five are valid only for format==GST_VOLUME_FORMAT_INT */
guint width;
guint depth;
guint endianness;
guint law;
gboolean is_signed;
/* the next three are valid only for format==GST_VOLUME_FORMAT_FLOAT */
const gchar *layout;
gfloat slope;
gfloat intercept;
};
struct _GstVolumeClass {
GstElementClass parent_class;
};
GType gst_volume_get_type(void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_VOLUME_H__ */