mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-02-23 06:26:23 +00:00
Code Issues 1 Projects Releases Wiki Activity

Rotate/flip video by increments of 90 degrees.

Browse source 
Original commit message from CVS:
Rotate/flip video by increments of 90 degrees.
This commit is contained in:
David Schleef 2003-06-13 05:37:19 +00:00
parent 195e19b6ad
commit 176e9f83f3
5 changed files with 840 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
gst/videoflip/Makefile.am Normal file
View file

@ -0,0 +1,12 @@
plugindir = $(libdir)/gstreamer-@GST_MAJORMINOR@
plugin_LTLIBRARIES = libgstvideoflip.la
libgstvideoflip_la_SOURCES = \
gstvideoflip.c \
videoflip.c
libgstvideoflip_la_CFLAGS = $(GST_CFLAGS)
libgstvideoflip_la_LIBADD =
libgstvideoflip_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = gstvideoflip.h videoflip.h

455
gst/videoflip/gstvideoflip.c Normal file
View file

@ -0,0 +1,455 @@
/* 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 <gstvideoflip.h>
#include <videoflip.h>
/* elementfactory information */
static GstElementDetails videoflip_details = {
"Video scaler",
"Filter/Video",
"LGPL",
"Resizes video",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2000",
};
/* GstVideoflip signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_METHOD,
/* FILL ME */
};
static void gst_videoflip_class_init (GstVideoflipClass *klass);
static void gst_videoflip_init (GstVideoflip *videoflip);
static void gst_videoflip_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_videoflip_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_videoflip_chain (GstPad *pad, GstBuffer *buf);
static GstCaps * gst_videoflip_get_capslist(void);
static GstElementClass *parent_class = NULL;
#define GST_TYPE_VIDEOFLIP_METHOD (gst_videoflip_method_get_type())
static GType
gst_videoflip_method_get_type(void)
{
static GType videoflip_method_type = 0;
static GEnumValue videoflip_methods[] = {
{ GST_VIDEOFLIP_METHOD_IDENTITY, "0", "Identity (no rotation)" },
{ GST_VIDEOFLIP_METHOD_90R, "1", "Rotate right 90 degrees" },
{ GST_VIDEOFLIP_METHOD_180, "2", "Rotate 180 degrees" },
{ GST_VIDEOFLIP_METHOD_90L, "3", "Rotate left 90 degrees" },
{ GST_VIDEOFLIP_METHOD_HORIZ, "4", "Flip horizontally" },
{ GST_VIDEOFLIP_METHOD_VERT, "5", "Flip vertically" },
{ GST_VIDEOFLIP_METHOD_TRANS, "6", "Flip across upper left/lower right diagonal" },
{ GST_VIDEOFLIP_METHOD_OTHER, "7", "Flip across upper right/lower left diagonal" },
{ 0, NULL, NULL },
};
if(!videoflip_method_type){
videoflip_method_type = g_enum_register_static("GstVideoflipMethod",
videoflip_methods);
}
return videoflip_method_type;
}
GType
gst_videoflip_get_type (void)
{
static GType videoflip_type = 0;
if (!videoflip_type) {
static const GTypeInfo videoflip_info = {
sizeof(GstVideoflipClass), NULL,
NULL,
(GClassInitFunc)gst_videoflip_class_init,
NULL,
NULL,
sizeof(GstVideoflip),
0,
(GInstanceInitFunc)gst_videoflip_init,
};
videoflip_type = g_type_register_static(GST_TYPE_ELEMENT, "GstVideoflip", &videoflip_info, 0);
}
return videoflip_type;
}
static void
gst_videoflip_class_init (GstVideoflipClass *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_METHOD,
g_param_spec_enum("method","method","method",
GST_TYPE_VIDEOFLIP_METHOD, GST_VIDEOFLIP_METHOD_90R,
G_PARAM_READWRITE));
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_videoflip_set_property;
gobject_class->get_property = gst_videoflip_get_property;
}
static GstPadTemplate *
gst_videoflip_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_videoflip_get_capslist ());
templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
}
return templ;
}
static GstPadTemplate *
gst_videoflip_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_videoflip_get_capslist ());
templ = GST_PAD_TEMPLATE_NEW("src", GST_PAD_SINK, GST_PAD_ALWAYS, caps);
}
return templ;
}
static GstCaps *
gst_videoflip_get_capslist(void)
{
static GstCaps *capslist = NULL;
GstCaps *caps;
int i;
if (capslist){
gst_caps_ref(capslist);
return capslist;
}
for(i=0;i<videoflip_n_formats;i++){
caps = videoflip_get_caps(videoflip_formats + i);
capslist = gst_caps_append(capslist, caps);
}
gst_caps_ref(capslist);
return capslist;
}
static GstCaps *
gst_videoflip_sink_getcaps (GstPad *pad, GstCaps *caps)
{
GstVideoflip *videoflip;
GstCaps *capslist = NULL;
GstCaps *peercaps;
GstCaps *sizecaps;
int i;
GST_DEBUG(0,"gst_videoflip_src_link");
videoflip = GST_VIDEOFLIP (gst_pad_get_parent (pad));
/* get list of peer's caps */
if(pad == videoflip->srcpad){
peercaps = gst_pad_get_allowed_caps (videoflip->sinkpad);
}else{
peercaps = gst_pad_get_allowed_caps (videoflip->srcpad);
}
/* FIXME videoflip 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<videoflip_n_formats;i++){
GstCaps *fromcaps = videoflip_get_caps(videoflip_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("videoflip_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_videoflip_get_capslist ());
gst_caps_unref (sizecaps);
return caps;
}
static GstPadLinkReturn
gst_videoflip_src_link (GstPad *pad, GstCaps *caps)
{
GstVideoflip *videoflip;
GstPadLinkReturn ret;
GstCaps *peercaps;
GST_DEBUG(0,"gst_videoflip_src_link");
videoflip = GST_VIDEOFLIP (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_LINK_DELAYED;
}
gst_caps_debug(caps,"ack");
videoflip->format = videoflip_find_by_caps (caps);
g_return_val_if_fail(videoflip->format, GST_PAD_LINK_REFUSED);
gst_caps_get_int (caps, "width", &videoflip->to_width);
gst_caps_get_int (caps, "height", &videoflip->to_height);
GST_DEBUG(0,"width %d height %d",videoflip->to_width,videoflip->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 (videoflip->srcpad, peercaps);
gst_caps_unref(peercaps);
if(ret==GST_PAD_LINK_OK){
caps = gst_pad_get_caps (videoflip->srcpad);
gst_caps_get_int (caps, "width", &videoflip->from_width);
gst_caps_get_int (caps, "height", &videoflip->from_height);
gst_videoflip_setup(videoflip);
}
return ret;
}
static GstPadLinkReturn
gst_videoflip_sink_link (GstPad *pad, GstCaps *caps)
{
GstVideoflip *videoflip;
GstPadLinkReturn ret;
GstCaps *peercaps;
GST_DEBUG(0,"gst_videoflip_src_link");
videoflip = GST_VIDEOFLIP (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps)) {
return GST_PAD_LINK_DELAYED;
}
videoflip->format = videoflip_find_by_caps (caps);
gst_caps_debug(caps,"ack");
g_return_val_if_fail(videoflip->format, GST_PAD_LINK_REFUSED);
gst_caps_get_int (caps, "width", &videoflip->from_width);
gst_caps_get_int (caps, "height", &videoflip->from_height);
gst_videoflip_setup(videoflip);
peercaps = gst_caps_copy(caps);
gst_caps_set(peercaps, "width", GST_PROPS_INT (videoflip->to_width));
gst_caps_set(peercaps, "height", GST_PROPS_INT (videoflip->to_height));
ret = gst_pad_try_set_caps (videoflip->srcpad, peercaps);
gst_caps_unref(peercaps);
if(ret==GST_PAD_LINK_OK){
caps = gst_pad_get_caps (videoflip->srcpad);
gst_caps_get_int (caps, "width", &videoflip->to_width);
gst_caps_get_int (caps, "height", &videoflip->to_height);
gst_videoflip_setup(videoflip);
}
return ret;
}
static void
gst_videoflip_init (GstVideoflip *videoflip)
{
GST_DEBUG(0,"gst_videoflip_init");
videoflip->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (gst_videoflip_sink_template_factory),
"sink");
gst_element_add_pad(GST_ELEMENT(videoflip),videoflip->sinkpad);
gst_pad_set_chain_function(videoflip->sinkpad,gst_videoflip_chain);
gst_pad_set_link_function(videoflip->sinkpad,gst_videoflip_sink_link);
gst_pad_set_getcaps_function(videoflip->sinkpad,gst_videoflip_sink_getcaps);
videoflip->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (gst_videoflip_src_template_factory),
"src");
gst_element_add_pad(GST_ELEMENT(videoflip),videoflip->srcpad);
gst_pad_set_link_function(videoflip->srcpad,gst_videoflip_src_link);
//gst_pad_set_getcaps_function(videoflip->srcpad,gst_videoflip_getcaps);
videoflip->inited = FALSE;
videoflip->force_size = FALSE;
}
static void
gst_videoflip_chain (GstPad *pad, GstBuffer *buf)
{
GstVideoflip *videoflip;
guchar *data;
gulong size;
GstBuffer *outbuf;
GST_DEBUG (0,"gst_videoflip_chain");
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
videoflip = GST_VIDEOFLIP (gst_pad_get_parent (pad));
g_return_if_fail (videoflip->inited);
data = GST_BUFFER_DATA(buf);
size = GST_BUFFER_SIZE(buf);
if(videoflip->passthru){
gst_pad_push(videoflip->srcpad, buf);
return;
}
GST_DEBUG (0,"gst_videoflip_chain: got buffer of %ld bytes in '%s'",size,
GST_OBJECT_NAME (videoflip));
GST_DEBUG(0,"size=%ld from=%dx%d to=%dx%d fromsize=%ld (should be %d) tosize=%d",
size,
videoflip->from_width, videoflip->from_height,
videoflip->to_width, videoflip->to_height,
size, videoflip->from_buf_size,
videoflip->to_buf_size);
g_return_if_fail (size == videoflip->from_buf_size);
outbuf = gst_buffer_new();
/* FIXME: handle bufferpools */
GST_BUFFER_SIZE(outbuf) = videoflip->to_buf_size;
GST_BUFFER_DATA(outbuf) = g_malloc (videoflip->to_buf_size);
GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf);
g_return_if_fail(videoflip->format);
GST_DEBUG (0,"format %s",videoflip->format->fourcc);
g_return_if_fail(videoflip->format->scale);
videoflip->format->scale(videoflip, GST_BUFFER_DATA(outbuf), data);
GST_DEBUG (0,"gst_videoflip_chain: pushing buffer of %d bytes in '%s'",GST_BUFFER_SIZE(outbuf),
GST_OBJECT_NAME (videoflip));
gst_pad_push(videoflip->srcpad, outbuf);
gst_buffer_unref(buf);
}
static void
gst_videoflip_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstVideoflip *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOFLIP(object));
src = GST_VIDEOFLIP(object);
GST_DEBUG(0,"gst_videoflip_set_property");
switch (prop_id) {
case ARG_METHOD:
src->method = g_value_get_enum (value);
break;
default:
break;
}
}
static void
gst_videoflip_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstVideoflip *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_VIDEOFLIP(object));
src = GST_VIDEOFLIP(object);
switch (prop_id) {
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 videoflip element */
factory = gst_element_factory_new("videoflip",GST_TYPE_VIDEOFLIP,
&videoflip_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (gst_videoflip_sink_template_factory));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (gst_videoflip_src_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videoflip",
plugin_init
};

94
gst/videoflip/gstvideoflip.h Normal file
View file

@ -0,0 +1,94 @@
/* 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_VIDEOFLIP_H__
#define __GST_VIDEOFLIP_H__
#include <config.h>
#include <gst/gst.h>
G_BEGIN_DECLS
typedef enum {
GST_VIDEOFLIP_METHOD_IDENTITY,
GST_VIDEOFLIP_METHOD_90R,
GST_VIDEOFLIP_METHOD_180,
GST_VIDEOFLIP_METHOD_90L,
GST_VIDEOFLIP_METHOD_HORIZ,
GST_VIDEOFLIP_METHOD_VERT,
GST_VIDEOFLIP_METHOD_TRANS,
GST_VIDEOFLIP_METHOD_OTHER,
} GstVideoflipMethod;
#define GST_TYPE_VIDEOFLIP \
(gst_videoflip_get_type())
#define GST_VIDEOFLIP(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEOFLIP,GstVideoflip))
#define GST_VIDEOFLIP_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEOFLIP,GstVideoflip))
#define GST_IS_VIDEOFLIP(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEOFLIP))
#define GST_IS_VIDEOFLIP_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEOFLIP))
typedef struct _GstVideoflip GstVideoflip;
typedef struct _GstVideoflipClass GstVideoflipClass;
struct _GstVideoflip {
GstElement element;
GstPad *sinkpad,*srcpad;
gboolean force_size;
gint forced_width;
gint forced_height;
/* video state */
gboolean inited;
struct videoflip_format_struct *format;
gint to_width;
gint to_height;
gint from_width;
gint from_height;
gboolean passthru;
GstVideoflipMethod method;
/* private */
gint from_buf_size;
gint to_buf_size;
};
struct _GstVideoflipClass {
GstElementClass parent_class;
};
GType gst_videoflip_get_type(void);
void gst_videoflip_setup(GstVideoflip *);
#define gst_videoflip_scale(scale, src, dest) (scale)->scale_cc((scale), (src), (dest))
G_END_DECLS
#endif /* __GST_VIDEOFLIP_H__ */

233
gst/videoflip/videoflip.c Normal file
View file

@ -0,0 +1,233 @@
/* 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 <gst/gst.h>
#include <stdlib.h>
#include <math.h>
#include <videoflip.h>
#include <string.h>
#include "config.h"
#include "gstvideoflip.h"
static void gst_videoflip_planar411 (GstVideoflip *scale, unsigned char *dest, unsigned char *src);
static void gst_videoflip_flip(GstVideoflip *videoflip, unsigned char *dest,
unsigned char *src, int sw, int sh, int dw, int dh);
struct videoflip_format_struct videoflip_formats[] = {
/* planar */
{ "YV12", 12, gst_videoflip_planar411, },
{ "I420", 12, gst_videoflip_planar411, },
{ "IYUV", 12, gst_videoflip_planar411, },
};
int videoflip_n_formats = sizeof(videoflip_formats)/sizeof(videoflip_formats[0]);
GstCaps *
videoflip_get_caps(struct videoflip_format_struct *format)
{
unsigned int fourcc;
GstCaps *caps;
if(format->scale==NULL)
return NULL;
fourcc = GST_MAKE_FOURCC(format->fourcc[0],format->fourcc[1],format->fourcc[2],format->fourcc[3]);
if(format->bpp){
caps = GST_CAPS_NEW ("videoflip", "video/raw",
"format", GST_PROPS_FOURCC (fourcc),
"depth", GST_PROPS_INT(format->bpp),
"bpp", GST_PROPS_INT(format->depth),
"endianness", GST_PROPS_INT(format->endianness),
"red_mask", GST_PROPS_INT(format->red_mask),
"green_mask", GST_PROPS_INT(format->green_mask),
"blue_mask", GST_PROPS_INT(format->blue_mask));
}else{
caps = GST_CAPS_NEW ("videoflip", "video/raw",
"format", GST_PROPS_FOURCC (fourcc));
}
return caps;
}
struct videoflip_format_struct *
videoflip_find_by_caps(GstCaps *caps)
{
int i;
GST_DEBUG (0,"finding %p",caps);
g_return_val_if_fail(caps != NULL, NULL);
for (i = 0; i < videoflip_n_formats; i++){
GstCaps *c;
c = videoflip_get_caps(videoflip_formats + i);
if(c){
if(gst_caps_is_always_compatible(caps, c)){
gst_caps_unref(c);
return videoflip_formats + i;
}
gst_caps_unref(c);
}
}
return NULL;
}
void
gst_videoflip_setup (GstVideoflip *videoflip)
{
if(videoflip->from_width==0 || videoflip->from_height==0){
return;
}
switch(videoflip->method){
case GST_VIDEOFLIP_METHOD_90R:
case GST_VIDEOFLIP_METHOD_90L:
case GST_VIDEOFLIP_METHOD_TRANS:
case GST_VIDEOFLIP_METHOD_OTHER:
videoflip->to_height = videoflip->from_width;
videoflip->to_width = videoflip->from_height;
break;
case GST_VIDEOFLIP_METHOD_IDENTITY:
case GST_VIDEOFLIP_METHOD_180:
case GST_VIDEOFLIP_METHOD_HORIZ:
case GST_VIDEOFLIP_METHOD_VERT:
videoflip->to_height = videoflip->from_height;
videoflip->to_width = videoflip->from_width;
break;
default:
/* FIXME */
break;
}
GST_DEBUG (0,"format=%p \"%s\" from %dx%d to %dx%d",
videoflip->format, videoflip->format->fourcc,
videoflip->from_width, videoflip->from_height,
videoflip->to_width, videoflip->to_height);
if(videoflip->method == GST_VIDEOFLIP_METHOD_IDENTITY){
GST_DEBUG (0,"videoflip: using passthru");
videoflip->passthru = TRUE;
videoflip->inited = TRUE;
return;
}
videoflip->from_buf_size = (videoflip->from_width * videoflip->from_height
* videoflip->format->depth) / 8;
videoflip->to_buf_size = (videoflip->to_width * videoflip->to_height
* videoflip->format->depth) / 8;
videoflip->inited = TRUE;
}
static void
gst_videoflip_planar411 (GstVideoflip *scale, unsigned char *dest, unsigned char *src)
{
int sw = scale->from_width;
int sh = scale->from_height;
int dw = scale->to_width;
int dh = scale->to_height;
GST_DEBUG (0,"videoflip: scaling planar 4:1:1 %dx%d to %dx%d", sw, sh, dw, dh);
gst_videoflip_flip(scale, dest, src, sw, sh, dw, dh);
src += sw*sh;
dest += dw*dh;
dh = dh>>1;
dw = dw>>1;
sh = sh>>1;
sw = sw>>1;
gst_videoflip_flip(scale, dest, src, sw, sh, dw, dh);
src += sw*sh;
dest += dw*dh;
gst_videoflip_flip(scale, dest, src, sw, sh, dw, dh);
}
static void
gst_videoflip_flip(GstVideoflip *videoflip, unsigned char *dest,
unsigned char *src, int sw, int sh, int dw, int dh)
{
int x,y;
switch(videoflip->method){
case GST_VIDEOFLIP_METHOD_90R:
for(y=0;y<dh;y++){
for(x=0;x<dw;x++){
dest[y*dw + x] = src[(sh - 1 - x)*sw + y];
}
}
break;
case GST_VIDEOFLIP_METHOD_90L:
for(y=0;y<dh;y++){
for(x=0;x<dw;x++){
dest[y*dw + x] = src[x*sw + (sw - 1 - y)];
}
}
break;
case GST_VIDEOFLIP_METHOD_180:
for(y=0;y<dh;y++){
for(x=0;x<dw;x++){
dest[y*dw + x] = src[(sh - 1 - y)*sw + (sw - 1 - x)];
}
}
break;
case GST_VIDEOFLIP_METHOD_HORIZ:
for(y=0;y<dh;y++){
for(x=0;x<dw;x++){
dest[y*dw + x] = src[y*sw + (sw - 1 - x)];
}
}
break;
case GST_VIDEOFLIP_METHOD_VERT:
for(y=0;y<dh;y++){
for(x=0;x<dw;x++){
dest[y*dw + x] = src[(sh - 1 - y)*sw + x];
}
}
break;
case GST_VIDEOFLIP_METHOD_TRANS:
for(y=0;y<dh;y++){
for(x=0;x<dw;x++){
dest[y*dw + x] = src[x*sw + y];
}
}
break;
case GST_VIDEOFLIP_METHOD_OTHER:
for(y=0;y<dh;y++){
for(x=0;x<dw;x++){
dest[y*dw + x] = src[(sh - 1 - x)*sw + (sw - 1 - y)];
}
}
break;
default:
/* FIXME */
break;
}
}

46
gst/videoflip/videoflip.h Normal file
View file

@ -0,0 +1,46 @@
/* GStreamer
* Copyright (C) <2003> David A. Schleef <ds@schleef.org>
*
* 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 __VIDEOFLIP_H__
#define __VIDEOFLIP_H__
#include "gstvideoflip.h"
struct videoflip_format_struct {
char *fourcc;
int depth;
void (*scale)(GstVideoflip *,unsigned char *dest, unsigned char *src);
int bpp;
unsigned int endianness;
unsigned int red_mask;
unsigned int green_mask;
unsigned int blue_mask;
};
extern struct videoflip_format_struct videoflip_formats[];
extern int videoflip_n_formats;
GstCaps *videoflip_get_caps(struct videoflip_format_struct *format);
struct videoflip_format_struct *videoflip_find_by_caps(GstCaps *caps);
#endif