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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 RGB-type AVI files.
*/
#include <stdlib.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "AVI_avi.h"
#include "avi_rgb.h"
#include "IMB_imbuf.h"
#include "BLI_utildefines.h"
/* implementation */
void *avi_converter_from_avi_rgb(AviMovie *movie,
int stream,
unsigned char *buffer,
const size_t *size)
{
unsigned char *buf;
AviBitmapInfoHeader *bi;
short bits = 32;
(void)size; /* unused */
bi = (AviBitmapInfoHeader *)movie->streams[stream].sf;
if (bi) {
bits = bi->BitCount;
}
if (bits == 16) {
unsigned short *pxl;
unsigned char *to;
#ifdef __BIG_ENDIAN__
unsigned char *pxla;
#endif
buf = imb_alloc_pixels(
movie->header->Height, movie->header->Width, 3, sizeof(unsigned char), "fromavirgbbuf");
if (buf) {
size_t y = movie->header->Height;
to = buf;
while (y--) {
pxl = (unsigned short *)(buffer + y * movie->header->Width * 2);
#ifdef __BIG_ENDIAN__
pxla = (unsigned char *)pxl;
#endif
size_t x = movie->header->Width;
while (x--) {
#ifdef __BIG_ENDIAN__
int i = pxla[0];
pxla[0] = pxla[1];
pxla[1] = i;
pxla += 2;
#endif
*(to++) = ((*pxl >> 10) & 0x1f) * 8;
*(to++) = ((*pxl >> 5) & 0x1f) * 8;
*(to++) = (*pxl & 0x1f) * 8;
pxl++;
}
}
}
MEM_freeN(buffer);
return buf;
}
buf = imb_alloc_pixels(
movie->header->Height, movie->header->Width, 3, sizeof(unsigned char), "fromavirgbbuf");
if (buf) {
size_t rowstride = movie->header->Width * 3;
BLI_assert(bits != 16);
if (movie->header->Width % 2) {
rowstride++;
}
for (size_t y = 0; y < movie->header->Height; y++) {
memcpy(&buf[y * movie->header->Width * 3],
&buffer[((movie->header->Height - 1) - y) * rowstride],
movie->header->Width * 3);
}
for (size_t y = 0; y < (size_t)movie->header->Height * (size_t)movie->header->Width * 3;
y += 3) {
int i = buf[y];
buf[y] = buf[y + 2];
buf[y + 2] = i;
}
}
MEM_freeN(buffer);
return buf;
}
void *avi_converter_to_avi_rgb(AviMovie *movie, int stream, unsigned char *buffer, size_t *size)
{
unsigned char *buf;
(void)stream; /* unused */
size_t rowstride = movie->header->Width * 3;
/* AVI files has uncompressed lines 4-byte aligned */
rowstride = (rowstride + 3) & ~3;
*size = movie->header->Height * rowstride;
buf = MEM_mallocN(*size, "toavirgbbuf");
for (size_t y = 0; y < movie->header->Height; y++) {
memcpy(&buf[y * rowstride],
&buffer[((movie->header->Height - 1) - y) * movie->header->Width * 3],
movie->header->Width * 3);
}
for (size_t y = 0; y < movie->header->Height; y++) {
for (size_t x = 0; x < movie->header->Width * 3; x += 3) {
int i = buf[y * rowstride + x];
buf[y * rowstride + x] = buf[y * rowstride + x + 2];
buf[y * rowstride + x + 2] = i;
}
}
MEM_freeN(buffer);
return buf;
}
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