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|
/* gap_gve_raw.c by Wolfgang Hofer (hof@gimp.org)
*
* (GAP ... GIMP Animation Plugins, now also known as GIMP Video)
* Routines for RAW video encoding
* useable for uncompressed AVI video.
* (GimpDrawable <--> Raw Bitmap Data)
*
*/
/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* revision history:
* version 1.2.2; 2003.04.18 hof: gap_gve_raw_YUV420P_drawable_encode get all ros from gimp pixel region with one call
* (need full buffersize but is faster than get row by row)
* version 1.2.2; 2002.12.15 hof: created
*/
/* SYSTEM (UNIX) includes */
#include <stdio.h>
#include <string.h>
/* GIMP includes */
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
/* GAP includes */
#include "gap_gve_raw.h"
/* the raw CODEC needs no extra LIB includes */
/*************************************************************
* TOOL FUNCTIONS *
*************************************************************/
/* ------------------------------------
* gap_gve_raw_BGR_drawable_encode
* ------------------------------------
* Encode drawable to RAW Buffer (Bytesequence BGR)
*
*/
guchar *
gap_gve_raw_BGR_drawable_encode(GimpDrawable *drawable, gint32 *RAW_size, gboolean vflip
,guchar *app0_buffer, gint32 app0_length)
{
GimpPixelRgn pixel_rgn;
GimpImageType drawable_type;
guchar *RAW_data;
guchar *RAW_ptr;
guchar *pixelrow_data;
guint l_row;
gint32 l_idx;
gint32 l_blue;
gint32 l_green;
gint32 l_red;
gint32 l_rowstride;
drawable_type = gimp_drawable_type (drawable->drawable_id);
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, drawable->width, drawable->height, FALSE, FALSE);
l_rowstride = drawable->width * drawable->bpp;
pixelrow_data = (guchar *)g_malloc0(l_rowstride);
*RAW_size = drawable->width * drawable->height * 3;
RAW_data = (guchar *)g_malloc0((drawable->width * drawable->height * 3)
+ app0_length);
if(app0_buffer)
{
memcpy(RAW_data, app0_buffer, app0_length);
*RAW_size += app0_length;
}
RAW_ptr = RAW_data + app0_length;
l_red = 0;
l_green = 1;
l_blue = 2;
if((drawable_type == GIMP_GRAY_IMAGE)
|| (drawable_type == GIMP_GRAYA_IMAGE))
{
l_green = 0;
l_blue = 0;
}
for(l_row = 0; l_row < drawable->height; l_row++)
{
gint32 l_src_row;
if(vflip) { l_src_row = (drawable->height - 1) - l_row; }
else { l_src_row = l_row;}
gimp_pixel_rgn_get_rect (&pixel_rgn, pixelrow_data
, 0
, l_src_row
, drawable->width
, 1);
for(l_idx=0;l_idx < l_rowstride; l_idx += drawable->bpp)
{
*(RAW_ptr++) = pixelrow_data[l_idx + l_blue];
*(RAW_ptr++) = pixelrow_data[l_idx + l_green];
*(RAW_ptr++) = pixelrow_data[l_idx + l_red];
}
}
g_free(pixelrow_data);
return(RAW_data);
} /* end gap_gve_raw_BGR_drawable_encode */
/* ------------------------------------
* gap_gve_raw_RGB_drawable_encode
* ------------------------------------
* Encode drawable to RAW Buffer (Bytesequence RGB)
*
*/
guchar *
gap_gve_raw_RGB_drawable_encode(GimpDrawable *drawable, gint32 *RAW_size, gboolean vflip
,guchar *app0_buffer, gint32 app0_length)
{
GimpPixelRgn pixel_rgn;
GimpImageType drawable_type;
guchar *RAW_data;
guchar *RAW_ptr;
guchar *pixelrow_data;
guint l_row;
gint32 l_idx;
gint32 l_blue;
gint32 l_green;
gint32 l_red;
gint32 l_rowstride;
drawable_type = gimp_drawable_type (drawable->drawable_id);
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, drawable->width, drawable->height, FALSE, FALSE);
l_rowstride = drawable->width * drawable->bpp;
pixelrow_data = (guchar *)g_malloc0(l_rowstride);
*RAW_size = drawable->width * drawable->height * 3;
RAW_data = (guchar *)g_malloc0((drawable->width * drawable->height * 3)
+ app0_length);
if(app0_buffer)
{
memcpy(RAW_data, app0_buffer, app0_length);
*RAW_size += app0_length;
}
RAW_ptr = RAW_data + app0_length;
l_red = 0;
l_green = 1;
l_blue = 2;
if((drawable_type == GIMP_GRAY_IMAGE)
|| (drawable_type == GIMP_GRAYA_IMAGE))
{
l_green = 0;
l_blue = 0;
}
for(l_row = 0; l_row < drawable->height; l_row++)
{
gint32 l_src_row;
if(vflip) { l_src_row = (drawable->height - 1) - l_row; }
else { l_src_row = l_row;}
gimp_pixel_rgn_get_rect (&pixel_rgn, pixelrow_data
, 0
, l_src_row
, drawable->width
, 1);
for(l_idx=0;l_idx < l_rowstride; l_idx += drawable->bpp)
{
*(RAW_ptr++) = pixelrow_data[l_idx + l_blue];
*(RAW_ptr++) = pixelrow_data[l_idx + l_green];
*(RAW_ptr++) = pixelrow_data[l_idx + l_red];
}
}
g_free(pixelrow_data);
return(RAW_data);
} /* end gap_gve_raw_RGB_drawable_encode */
/* ------------------------------------
* gap_gve_raw_YUV444_drawable_encode
* ------------------------------------
* Encode drawable to RAW Buffer (YUV 4:4:4 colormodel)
*
* for image width =5 , height = 3 the returned buffer is filled
* in the folloing Byte order:
* YYYYY YYYYY YYYYY UUUUU UUUUU UUUUU VVVVV VVVVV VVVVV
*/
guchar *
gap_gve_raw_YUV444_drawable_encode(GimpDrawable *drawable, gint32 *RAW_size, gboolean vflip
,guchar *app0_buffer, gint32 app0_length
,gint32 matrix_coefficients
)
{
guint j;
int i;
int r, g, b;
double y, u, v;
double cr, cg, cb, cu, cv;
unsigned char *yp, *up, *vp;
static unsigned char *y444, *u444, *v444;
static double coef[7][3] = {
{0.2125,0.7154,0.0721}, /* ITU-R Rec. 709 (1990) */
{0.299, 0.587, 0.114}, /* unspecified */
{0.299, 0.587, 0.114}, /* reserved */
{0.30, 0.59, 0.11}, /* FCC */
{0.299, 0.587, 0.114}, /* ITU-R Rec. 624-4 System B, G */
{0.299, 0.587, 0.114}, /* SMPTE 170M */
{0.212, 0.701, 0.087}}; /* SMPTE 240M (1987) */
GimpPixelRgn srcPR;
gint32 l_rowstride;
guchar *pixelrow_data;
guchar *RAW_data;
guchar *RAW_ptr;
GimpImageType drawable_type;
gint32 l_blue;
gint32 l_green;
gint32 l_red;
guint l_row;
drawable_type = gimp_drawable_type (drawable->drawable_id);
l_rowstride = drawable->width * drawable->bpp;
pixelrow_data = (guchar *)g_malloc0(l_rowstride);
*RAW_size = drawable->width * drawable->height * 3;
RAW_data = (guchar *)g_malloc0((drawable->width * drawable->height * 3)
+ app0_length);
if(app0_buffer)
{
memcpy(RAW_data, app0_buffer, app0_length);
*RAW_size += app0_length;
}
RAW_ptr = RAW_data + app0_length;
l_red = 0;
l_green = 1;
l_blue = 2;
if((drawable_type == GIMP_GRAY_IMAGE)
|| (drawable_type == GIMP_GRAYA_IMAGE))
{
l_green = 0;
l_blue = 0;
}
i = matrix_coefficients;
if ((i>8) || (i<0))
{
i = 3;
}
cr = coef[i-1][0];
cg = coef[i-1][1];
cb = coef[i-1][2];
cu = 0.5/(1.0-cb);
cv = 0.5/(1.0-cr);
y444 = RAW_ptr;
u444 = RAW_ptr + (drawable->width * drawable->height);
v444 = RAW_ptr + ((drawable->width * drawable->height) * 2 );
/* get drawable */
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, drawable->width, drawable->height,
FALSE, FALSE);
/* copy imagedata to yuv rowpointers */
for(l_row = 0; l_row < drawable->height; l_row++)
{
gint32 l_row_x_width;
guchar *l_bptr;
gint32 l_src_row;
if(vflip) { l_src_row = (drawable->height - 1) - l_row; }
else { l_src_row = l_row;}
l_row_x_width = l_row * drawable->width;
yp = y444 + l_row_x_width;
up = u444 + l_row_x_width;
vp = v444 + l_row_x_width;
gimp_pixel_rgn_get_row (&srcPR, pixelrow_data, 0, l_src_row, drawable->width);
l_bptr = pixelrow_data;
for (j=0; j < drawable->width; j++)
{
/* peek RGB (for grey images: R==G==B) */
r=l_bptr[l_red];
g=l_bptr[l_green];
b=l_bptr[l_blue];
/* convert to YUV */
y = cr*r + cg*g + cb*b;
u = cu*(b-y);
v = cv*(r-y);
yp[j] = (219.0/256.0)*y + 16.5; /* nominal range: 16..235 */
up[j] = (224.0/256.0)*u + 128.5; /* 16..240 */
vp[j] = (224.0/256.0)*v + 128.5; /* 16..240 */
l_bptr += drawable->bpp; /* advance read pointer */
}
}
g_free(pixelrow_data);
return(RAW_data);
} /* end gap_gve_raw_YUV444_drawable_encode */
/* ------------------------------
* gap_gve_raw_YUV420P_drawable_encode
* ------------------------------
* - convert Gimp drawable to YUV420P colormodel
* suitable for FFMEG Codec input.
* - both width and height must be a multiple of 2
* - output is written to yuv420_buffer (without size checks)
* the caller must provide this buffer large enough
* (width * height * 1.5)
*
* ouput byte sequence example for image width = 6, height = 4
* YYYYYY YYYYYY YYYYYY YYYYYY UUU UUU VVV VVV
*
*/
#define SCALEBITS 8
#define ONE_HALF (1 << (SCALEBITS - 1))
#define FIX(x) ((int) ((x) * (1L<<SCALEBITS) + 0.5))
void
gap_gve_raw_YUV420P_drawable_encode(GimpDrawable *drawable, guchar *yuv420_buffer)
{
guint x, y;
int wrap, wrap3;
int r, g, b, r1, g1, b1;
guchar *p;
guchar *lum;
guchar *cb;
guchar *cr;
GimpImageType drawable_type;
GimpPixelRgn srcPR;
gint32 l_blue;
gint32 l_green;
gint32 l_red;
guchar *all_pixelrows;
int size;
drawable_type = gimp_drawable_type (drawable->drawable_id);
l_red = 0;
l_green = 1;
l_blue = 2;
if((drawable_type == GIMP_GRAY_IMAGE)
|| (drawable_type == GIMP_GRAYA_IMAGE))
{
l_red = 0;
l_green = 0;
l_blue = 0;
}
/* init Pixel Region */
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, drawable->width, drawable->height,
FALSE, FALSE);
wrap = drawable->width;
wrap3 = drawable->width * drawable->bpp;
size = drawable->width * drawable->height;
lum = yuv420_buffer;
cb = yuv420_buffer + size;
cr = cb + (size / 4);
/* buffer for 2 pixelrows (RGB, RGBA, GREY, or GRAYA Gimp Colormodel) */
all_pixelrows = g_malloc(wrap3 * drawable->height);
gimp_pixel_rgn_get_rect (&srcPR, all_pixelrows
, 0
, 0
, drawable->width
, drawable->height /* get all rows */
);
for(y=0;y < drawable->height;y+=2)
{
p = all_pixelrows + (y * wrap3);
for(x=0;x < drawable->width;x+=2)
{
r = p[l_red];
g = p[l_green];
b = p[l_blue];
r1 = r;
g1 = g;
b1 = b;
lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
r = p[drawable->bpp + l_red];
g = p[drawable->bpp + l_green];
b = p[drawable->bpp + l_blue];
r1 += r;
g1 += g;
b1 += b;
lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
/* step to next row (same column) */
p += wrap3;
lum += wrap;
r = p[l_red];
g = p[l_green];
b = p[l_blue];
r1 += r;
g1 += g;
b1 += b;
lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
r = p[drawable->bpp + l_red];
g = p[drawable->bpp + l_green];
b = p[drawable->bpp + l_blue];
r1 += r;
g1 += g;
b1 += b;
lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cb++;
cr++;
/* backstep to current row and advance 2 column */
p += -wrap3 + 2 * drawable->bpp;
lum += -wrap + 2;
}
lum += wrap;
}
g_free(all_pixelrows);
} /* end gap_gve_raw_YUV420P_drawable_encode */
/* ------------------------------------
* gap_gve_raw_YUV420_drawable_encode
* ------------------------------------
* Encode drawable to RAW Buffer (YUV420 encoded)
*
*/
guchar *
gap_gve_raw_YUV420_drawable_encode(GimpDrawable *drawable, gint32 *RAW_size, gboolean vflip
,guchar *app0_buffer, gint32 app0_length)
{
guchar *RAW_data;
guchar *RAW_ptr;
*RAW_size = drawable->width * drawable->height * 3;
RAW_data = (guchar *)g_malloc0((drawable->width * drawable->height * 3)
+ app0_length);
if(app0_buffer)
{
memcpy(RAW_data, app0_buffer, app0_length);
*RAW_size += app0_length;
}
RAW_ptr = RAW_data + app0_length;
gap_gve_raw_YUV420P_drawable_encode(drawable, RAW_ptr);
return(RAW_data);
} /* end gap_gve_raw_YUV420_drawable_encode */
|
