?? image.c
字號:
/**************************************************************************
*
* XVID MPEG-4 VIDEO CODEC
* image stuff
*
* This program is an implementation of a part of one or more MPEG-4
* Video tools as specified in ISO/IEC 14496-2 standard. Those intending
* to use this software module in hardware or software products are
* advised that its use may infringe existing patents or copyrights, and
* any such use would be at such party's own risk. The original
* developer of this software module and his/her company, and subsequent
* editors and their companies, will have no liability for use of this
* software or modifications or derivatives thereof.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*************************************************************************/
/**************************************************************************
*
* History:
*
* 09.04.2002 PSNR calculations
* 06.04.2002 removed interlaced edging from U,V blocks (as per spec)
* 26.03.2002 interlacing support (field-based edging in set_edges)
* 26.01.2002 rgb555, rgb565
* 07.01.2001 commented u,v interpolation (not required for uv-block-based)
* 23.12.2001 removed #ifdefs, added function pointers + init_common()
* 22.12.2001 cpu #ifdefs
* 19.12.2001 image_dump(); useful for debugging
* 6.12.2001 inital version; (c)2001 peter ross <pross@cs.rmit.edu.au>
*
*************************************************************************/
#include <stdlib.h>
#include <string.h> // memcpy, memset
#include <math.h>
#include "../portab.h"
#include "../xvid.h" // XVID_CSP_XXX's
#include "image.h"
#include "colorspace.h"
#include "interpolate8x8.h"
#include "../divx4.h"
#include "../utils/mem_align.h"
#define SAFETY 64
#define EDGE_SIZE2 (EDGE_SIZE/2)
int32_t image_create(IMAGE * image, uint32_t edged_width, uint32_t edged_height)
{
const uint32_t edged_width2 = edged_width / 2;
const uint32_t edged_height2 = edged_height / 2;
uint32_t i;
image->y = xvid_malloc(edged_width * (edged_height + 1) + SAFETY, CACHE_LINE);
if (image->y == NULL)
{
return -1;
}
for (i=0;i < edged_width * edged_height + SAFETY;i++)
{
image->y[i]=0;
}
image->u = xvid_malloc(edged_width2 * edged_height2 + SAFETY, CACHE_LINE);
if (image->u == NULL)
{
xvid_free(image->y);
return -1;
}
image->v = xvid_malloc(edged_width2 * edged_height2 + SAFETY, CACHE_LINE);
if (image->v == NULL)
{
xvid_free(image->u);
xvid_free(image->y);
return -1;
}
image->y += EDGE_SIZE * edged_width + EDGE_SIZE;
image->u += EDGE_SIZE2 * edged_width2 + EDGE_SIZE2;
image->v += EDGE_SIZE2 * edged_width2 + EDGE_SIZE2;
return 0;
}
void image_destroy(IMAGE * image, uint32_t edged_width, uint32_t edged_height)
{
const uint32_t edged_width2 = edged_width / 2;
if (image->y)
{
xvid_free(image->y - (EDGE_SIZE * edged_width + EDGE_SIZE) );
}
if (image->u)
{
xvid_free(image->u - (EDGE_SIZE2 * edged_width2 + EDGE_SIZE2));
}
if (image->v)
{
xvid_free(image->v - (EDGE_SIZE2 * edged_width2 + EDGE_SIZE2));
}
}
void image_swap(IMAGE * image1, IMAGE * image2)
{
uint8_t * tmp;
tmp = image1->y;
image1->y = image2->y;
image2->y = tmp;
tmp = image1->u;
image1->u = image2->u;
image2->u = tmp;
tmp = image1->v;
image1->v = image2->v;
image2->v = tmp;
}
void image_copy(IMAGE *image1, IMAGE * image2, uint32_t edged_width, uint32_t height)
{
memcpy(image1->y, image2->y, edged_width * height);
memcpy(image1->u, image2->u, edged_width * height / 4);
memcpy(image1->v, image2->v, edged_width * height / 4);
}
void image_setedges(IMAGE * image, uint32_t edged_width, uint32_t edged_height, uint32_t width, uint32_t height, uint32_t interlacing)
{
const uint32_t edged_width2 = edged_width / 2;
const uint32_t width2 = width / 2;
uint32_t i;
uint8_t * dst;
uint8_t * src;
dst = image->y - (EDGE_SIZE + EDGE_SIZE * edged_width);
src = image->y;
for (i = 0; i < EDGE_SIZE; i++)
{
// if interlacing, edges contain top-most data from each field
if (interlacing && (i & 1))
{
memset(dst, *(src + edged_width), EDGE_SIZE);
memcpy(dst + EDGE_SIZE, src + edged_width, width);
memset(dst + edged_width - EDGE_SIZE, *(src + edged_width + width - 1), EDGE_SIZE);
}
else
{
memset(dst, *src, EDGE_SIZE);
memcpy(dst + EDGE_SIZE, src, width);
memset(dst + edged_width - EDGE_SIZE, *(src + width - 1), EDGE_SIZE);
}
dst += edged_width;
}
for (i = 0; i < height; i++)
{
memset(dst, *src, EDGE_SIZE);
memset(dst + edged_width - EDGE_SIZE, src[width - 1], EDGE_SIZE);
dst += edged_width;
src += edged_width;
}
src -= edged_width;
for (i = 0; i < EDGE_SIZE; i++)
{
// if interlacing, edges contain bottom-most data from each field
if (interlacing && !(i & 1))
{
memset(dst, *(src - edged_width), EDGE_SIZE);
memcpy(dst + EDGE_SIZE, src - edged_width, width);
memset(dst + edged_width - EDGE_SIZE, *(src - edged_width + width - 1), EDGE_SIZE);
}
else
{
memset(dst, *src, EDGE_SIZE);
memcpy(dst + EDGE_SIZE, src, width);
memset(dst + edged_width - EDGE_SIZE, *(src + width - 1), EDGE_SIZE);
}
dst += edged_width;
}
//U
dst = image->u - (EDGE_SIZE2 + EDGE_SIZE2 * edged_width2);
src = image->u;
for (i = 0; i < EDGE_SIZE2; i++)
{
memset(dst, *src, EDGE_SIZE2);
memcpy(dst + EDGE_SIZE2, src, width2);
memset(dst + edged_width2 - EDGE_SIZE2, *(src + width2 - 1), EDGE_SIZE2);
dst += edged_width2;
}
for (i = 0; i < height / 2; i++)
{
memset(dst, *src, EDGE_SIZE2);
memset(dst + edged_width2 - EDGE_SIZE2, src[width2 - 1], EDGE_SIZE2);
dst += edged_width2;
src += edged_width2;
}
src -= edged_width2;
for (i = 0; i < EDGE_SIZE2; i++)
{
memset(dst, *src, EDGE_SIZE2);
memcpy(dst + EDGE_SIZE2, src, width2);
memset(dst + edged_width2 - EDGE_SIZE2, *(src + width2 - 1), EDGE_SIZE2);
dst += edged_width2;
}
// V
dst = image->v - (EDGE_SIZE2 + EDGE_SIZE2 * edged_width2);
src = image->v;
for (i = 0; i < EDGE_SIZE2; i++)
{
memset(dst, *src, EDGE_SIZE2);
memcpy(dst + EDGE_SIZE2, src, width2);
memset(dst + edged_width2 - EDGE_SIZE2, *(src + width2 - 1), EDGE_SIZE2);
dst += edged_width2;
}
for (i = 0; i < height / 2; i++)
{
memset(dst, *src, EDGE_SIZE2);
memset(dst + edged_width2 - EDGE_SIZE2, src[width2 - 1], EDGE_SIZE2);
dst += edged_width2;
src += edged_width2;
}
src -= edged_width2;
for (i = 0; i < EDGE_SIZE2; i++)
{
memset(dst, *src, EDGE_SIZE2);
memcpy(dst + EDGE_SIZE2, src, width2);
memset(dst + edged_width2 - EDGE_SIZE2, *(src + width2 - 1), EDGE_SIZE2);
dst += edged_width2;
}
}
void image_interpolate(const IMAGE * refn,
IMAGE * refh, IMAGE * refv, IMAGE * refhv,
uint32_t edged_width, uint32_t edged_height, uint32_t rounding)
{
uint32_t offset;
uint8_t *n_ptr, *h_ptr, *v_ptr, *hv_ptr;
uint32_t x,y;
uint32_t stride_add = 7 * edged_width;
offset = EDGE_SIZE * (edged_width + 1);
n_ptr = refn->y;
h_ptr = refh->y;
v_ptr = refv->y;
hv_ptr = refhv->y;
n_ptr -= offset;
h_ptr -= offset;
v_ptr -= offset;
hv_ptr -= offset;
for(y = 0; y < edged_height; y = y + 8) {
for(x = 0; x < edged_width; x = x + 8) {
interpolate8x8_halfpel_h(h_ptr, n_ptr, edged_width, rounding);
interpolate8x8_halfpel_v(v_ptr, n_ptr, edged_width, rounding);
interpolate8x8_halfpel_hv(hv_ptr, n_ptr, edged_width, rounding);
n_ptr += 8;
h_ptr += 8;
v_ptr += 8;
hv_ptr += 8;
}
h_ptr += stride_add;
v_ptr += stride_add;
hv_ptr += stride_add;
n_ptr += stride_add;
}
/*
interpolate_halfpel_h(
refh->y - offset,
refn->y - offset,
edged_width, edged_height,
rounding);
interpolate_halfpel_v(
refv->y - offset,
refn->y - offset,
edged_width, edged_height,
rounding);
interpolate_halfpel_hv(
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -