gstreamer/libs/colorspace/rgb2rgb.c

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/* 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 <gst/gst.h>
#include <gstcolorspace.h>
static void gst_colorspace_rgb_to_rgb_identity(GstColorSpaceConverter *space, unsigned char *src, unsigned char *dest);
static void gst_colorspace_rgb24_to_bgr24(GstColorSpaceConverter *space, unsigned char *src, unsigned char *dest);
static void gst_colorspace_rgb32_to_bgr32(GstColorSpaceConverter *space, unsigned char *src, unsigned char *dest);
static void gst_colorspace_rgb555_to_rgb565(GstColorSpaceConverter *space, unsigned char *src, unsigned char *dest);
GstColorSpaceConvertFunction gst_colorspace_rgb2rgb_get_converter(GstColorSpaceConverter *space, GstColorSpaceType src, GstColorSpaceType dest) {
switch(src) {
case GST_COLORSPACE_RGB24:
space->insize = space->width*space->height*3;
switch(dest) {
case GST_COLORSPACE_RGB24:
space->outsize = space->width*space->height*3;
return gst_colorspace_rgb_to_rgb_identity;
case GST_COLORSPACE_BGR24:
space->outsize = space->width*space->height*3;
return gst_colorspace_rgb24_to_bgr24;
default:
break;
}
break;
case GST_COLORSPACE_BGR24:
space->insize = space->width*space->height*3;
switch(dest) {
case GST_COLORSPACE_RGB24:
space->outsize = space->width*space->height*3;
return gst_colorspace_rgb24_to_bgr24;
case GST_COLORSPACE_BGR24:
space->outsize = space->width*space->height*3;
return gst_colorspace_rgb_to_rgb_identity;
default:
break;
}
break;
case GST_COLORSPACE_RGB32:
space->insize = space->width*space->height*4;
switch(dest) {
case GST_COLORSPACE_BGR32:
space->outsize = space->width*space->height*4;
return gst_colorspace_rgb32_to_bgr32;
case GST_COLORSPACE_RGB32:
space->outsize = space->width*space->height*4;
return gst_colorspace_rgb_to_rgb_identity;
default:
break;
}
break;
case GST_COLORSPACE_BGR32:
space->insize = space->width*space->height*4;
switch(dest) {
case GST_COLORSPACE_RGB32:
space->outsize = space->width*space->height*4;
return gst_colorspace_rgb32_to_bgr32;
case GST_COLORSPACE_BGR32:
space->outsize = space->width*space->height*4;
return gst_colorspace_rgb_to_rgb_identity;
default:
break;
}
break;
case GST_COLORSPACE_BGR555:
space->insize = space->width*space->height*2;
switch(dest) {
case GST_COLORSPACE_RGB555:
space->outsize = space->width*space->height*2;
return gst_colorspace_rgb32_to_bgr32;
case GST_COLORSPACE_BGR565:
space->outsize = space->width*space->height*2;
return gst_colorspace_rgb555_to_rgb565;
default:
break;
}
default:
break;
}
g_print("gst_colorspace: conversion not supported %d %d\n", src, dest);
return NULL;
}
static void gst_colorspace_rgb_to_rgb_identity(GstColorSpaceConverter *space, unsigned char *src, unsigned char *dest)
{
memcpy(dest, src, space->outsize);
}
static void gst_colorspace_rgb24_to_bgr24(GstColorSpaceConverter *space, unsigned char *src, unsigned char *dest)
{
gint size;
gchar temp;
DEBUG("gst_colorspace_rgb24_to_bgr24 %p %p %d\n", src, dest, space->outsize);
size = space->outsize/3;
if (src == dest) {
while (size--) {
temp = src[0];
src[0] = src[2];
src[2] = temp;
src+=3;
}
}
else {
while (size--) {
*dest++ = src[2];
*dest++ = src[1];
*dest++ = src[0];
src+=3;
}
}
DEBUG("gst_colorspace_rgb24_to_bgr24 end\n");
}
static void gst_colorspace_rgb32_to_bgr32(GstColorSpaceConverter *space, unsigned char *src, unsigned char *dest)
{
gint size;
gchar temp;
DEBUG("gst_colorspace_rgb32_to_bgr32 %p %p %d\n", src, dest, space->outsize);
size = space->outsize/4;
if (src == dest) {
while (size--) {
temp = src[0];
src[0] = src[2];
src[2] = temp;
src+=4;
}
}
else {
while (size--) {
*dest++ = src[2];
*dest++ = src[1];
*dest++ = src[0];
dest++;
src+=4;
}
}
DEBUG("gst_colorspace_rgb32_to_bgr32 end\n");
}
static void gst_colorspace_rgb555_to_rgb565(GstColorSpaceConverter *space, unsigned char *src, unsigned char *dest)
{
gint size;
guint32 *srcptr = (guint32 *) src;
guint32 *destptr = (guint32 *) dest;
DEBUG("gst_colorspace_rgb555_to_rgb565 %p %p %d\n", src, dest, space->outsize);
size = space->outsize/4;
if (src == dest) {
while (size--) {
*srcptr += (*srcptr++)&0xFFE0FFE0;
}
}
else {
while (size--) {
*destptr++ = *srcptr + ((*srcptr++)&0xFFE0FFE0);
}
}
}