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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2001-2002 NaN Holding BV. All rights reserved. */
/** \file
* \ingroup avi
*
* This is external code. Converts between rgb32 and avi.
*/
#include <stdlib.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "IMB_imbuf.h"
#include "AVI_avi.h"
#include "avi_rgb32.h"
void *avi_converter_from_rgb32(AviMovie *movie, int stream, unsigned char *buffer, size_t *size)
{
unsigned char *buf;
(void)stream; /* unused */
*size = (size_t)movie->header->Height * (size_t)movie->header->Width * 3;
buf = imb_alloc_pixels(
movie->header->Height, movie->header->Width, 3, sizeof(unsigned char), "fromrgb32buf");
if (!buf) {
return NULL;
}
size_t rowstridea = movie->header->Width * 3;
size_t rowstrideb = movie->header->Width * 4;
for (size_t y = 0; y < movie->header->Height; y++) {
for (size_t x = 0; x < movie->header->Width; x++) {
buf[y * rowstridea + x * 3 + 0] = buffer[y * rowstrideb + x * 4 + 3];
buf[y * rowstridea + x * 3 + 1] = buffer[y * rowstrideb + x * 4 + 2];
buf[y * rowstridea + x * 3 + 2] = buffer[y * rowstrideb + x * 4 + 1];
}
}
MEM_freeN(buffer);
return buf;
}
void *avi_converter_to_rgb32(AviMovie *movie, int stream, unsigned char *buffer, size_t *size)
{
unsigned char *buf;
unsigned char *to, *from;
(void)stream; /* unused */
*size = (size_t)movie->header->Height * (size_t)movie->header->Width * 4;
buf = imb_alloc_pixels(
movie->header->Height, movie->header->Width, 4, sizeof(unsigned char), "torgb32buf");
if (!buf) {
return NULL;
}
memset(buf, 255, *size);
to = buf;
from = buffer;
size_t i = (size_t)movie->header->Height * (size_t)movie->header->Width;
while (i--) {
memcpy(to, from, 3);
to += 4;
from += 3;
}
MEM_freeN(buffer);
return buf;
}
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