mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-12 09:26:20 +00:00
153a8ae752
Solves overreading/writing the given arrays and will error out if the streams asks to do that. Also does more error checking that the stream is valid and won't overrun any allocated arrays. Also mitigate integer overflow errors calculating allocation sizes. https://bugzilla.gnome.org/show_bug.cgi?id=774859
118 lines
2.8 KiB
C
118 lines
2.8 KiB
C
/* GStreamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
|
|
*
|
|
* 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <gst/gst.h>
|
|
|
|
#include "flx_color.h"
|
|
|
|
FlxColorSpaceConverter *
|
|
flx_colorspace_converter_new (gint width, gint height)
|
|
{
|
|
FlxColorSpaceConverter *new = g_malloc (sizeof (FlxColorSpaceConverter));
|
|
|
|
new->width = width;
|
|
new->height = height;
|
|
|
|
memset (new->palvec, 0, sizeof (new->palvec));
|
|
return new;
|
|
}
|
|
|
|
void
|
|
flx_colorspace_converter_destroy (FlxColorSpaceConverter * flxpal)
|
|
{
|
|
g_return_if_fail (flxpal != NULL);
|
|
|
|
g_free (flxpal);
|
|
}
|
|
|
|
void
|
|
flx_colorspace_convert (FlxColorSpaceConverter * flxpal, guchar * src,
|
|
guchar * dest)
|
|
{
|
|
guint size, col;
|
|
|
|
g_return_if_fail (flxpal != NULL);
|
|
g_return_if_fail (src != dest);
|
|
|
|
|
|
size = flxpal->width * flxpal->height;
|
|
|
|
while (size--) {
|
|
col = (*src++ * 3);
|
|
|
|
#if G_BYTE_ORDER == G_BIG_ENDIAN
|
|
*dest++ = 0;
|
|
*dest++ = flxpal->palvec[col];
|
|
*dest++ = flxpal->palvec[col + 1];
|
|
*dest++ = flxpal->palvec[col + 2];
|
|
#else
|
|
*dest++ = flxpal->palvec[col + 2];
|
|
*dest++ = flxpal->palvec[col + 1];
|
|
*dest++ = flxpal->palvec[col];
|
|
*dest++ = 0;
|
|
#endif
|
|
}
|
|
|
|
}
|
|
|
|
|
|
void
|
|
flx_set_palette_vector (FlxColorSpaceConverter * flxpal, guint start, guint num,
|
|
guchar * newpal, gint scale)
|
|
{
|
|
guint grab;
|
|
|
|
g_return_if_fail (flxpal != NULL);
|
|
g_return_if_fail (start < 0x100);
|
|
|
|
grab = ((start + num) > 0x100 ? 0x100 - start : num);
|
|
|
|
if (scale) {
|
|
gint i = 0;
|
|
|
|
start *= 3;
|
|
while (grab) {
|
|
flxpal->palvec[start++] = newpal[i++] << scale;
|
|
flxpal->palvec[start++] = newpal[i++] << scale;
|
|
flxpal->palvec[start++] = newpal[i++] << scale;
|
|
grab--;
|
|
}
|
|
} else {
|
|
memcpy (&flxpal->palvec[start * 3], newpal, grab * 3);
|
|
}
|
|
}
|
|
|
|
void
|
|
flx_set_color (FlxColorSpaceConverter * flxpal, guint colr, guint red,
|
|
guint green, guint blue, gint scale)
|
|
{
|
|
|
|
g_return_if_fail (flxpal != NULL);
|
|
g_return_if_fail (colr < 0x100);
|
|
|
|
flxpal->palvec[(colr * 3)] = red << scale;
|
|
flxpal->palvec[(colr * 3) + 1] = green << scale;
|
|
flxpal->palvec[(colr * 3) + 2] = blue << scale;
|
|
}
|