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megapixels
mirror of https://git.sr.ht/~martijnbraam/megapixels
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Code Issues Releases Wiki Activity

Added quick'n'bad debayer implementation for previews

This commit is contained in:
Martijn Braam 2020-09-15 00:03:41 +02:00
parent 5c0611c64f
commit 243ef89cb5
4 changed files with 40 additions and 4 deletions
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9
main.c
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@ -15,6 +15,7 @@
#include <gtk/gtk.h>
#include "ini.h"
#include "bayer.h"
#include "quickdebayer.h"
enum io_method {
IO_METHOD_READ,
@ -370,12 +371,14 @@ process_image(const int *p, int size)
method = DC1394_BAYER_METHOD_SIMPLE;
// method = DC1394_BAYER_METHOD_VNG is slightly sharper but takes 10 seconds;
pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, current_width, current_height);
pixels = gdk_pixbuf_get_pixels(pixbuf);
dc1394_bayer_decoding_8bit((const uint8_t *) p, pixels, current_width, current_height, filter, method);
} else {
pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, current_width / 2, current_height / 2);
pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, current_width / 6, current_height / 6);
pixels = gdk_pixbuf_get_pixels(pixbuf);
quick_debayer_bggr8((const uint8_t *)p, pixels, current_width, current_height, 3);
}
pixels = gdk_pixbuf_get_pixels(pixbuf);
dc1394_bayer_decoding_8bit((const uint8_t *) p, pixels, current_width, current_height, filter, method);
if (current_rotate == 0) {
pixbufrot = pixbuf;
} else if (current_rotate == 90) {

2
meson.build
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@ -4,7 +4,7 @@ gtkdep = dependency('gtk+-3.0')
cc = meson.get_compiler('c')
libm = cc.find_library('m', required: false)
executable('megapixels', 'main.c', 'ini.c', 'bayer.c', dependencies : [gtkdep, libm], install : true)
executable('megapixels', 'main.c', 'ini.c', 'bayer.c', 'quickdebayer.c', dependencies : [gtkdep, libm], install : true)
install_data(['camera.glade', 'camera.css'],
install_dir : get_option('datadir') / 'megapixels/ui')

29
quickdebayer.c Normal file
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@ -0,0 +1,29 @@
#include "quickdebayer.h"
// Fast but bad debayer method that scales and rotates by skipping source pixels and
// doesn't interpolate any values at all
void
quick_debayer_bggr8(const uint8_t *source, uint8_t *destination, int width, int height, int skip)
{
int byteskip = 2 * skip;
int input_size = width * height;
int i;
int j=0;
int row_left = width;
// B G
// G R
for(i=0;i<input_size;) {
destination[j++] = source[i+width+1];
destination[j++] = source[i+1];
destination[j++] = source[i];
i = i + byteskip;
row_left = row_left - byteskip;
if(row_left <= 0){
row_left = width;
i = i+width;
i = i + (width * 2 * (skip-1));
}
}
}

4
quickdebayer.h Normal file
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@ -0,0 +1,4 @@
#include <stdint.h>
void quick_debayer_bggr8(const uint8_t *source, uint8_t *destination, int width, int height, int skip);