ref: 8967fcaf845ae956c5f59baebd917a5e3da53e56
dir: /vpx_scale/generic/yv12extend.c/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vpx_scale/yv12config.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_scale/vpxscale.h"
/****************************************************************************
* Exports
****************************************************************************/
/****************************************************************************
*
****************************************************************************/
void
vp8_yv12_extend_frame_borders_c(YV12_BUFFER_CONFIG *ybf)
{
int i;
unsigned char *src_ptr1, *src_ptr2;
unsigned char *dest_ptr1, *dest_ptr2;
unsigned int Border;
int plane_stride;
int plane_height;
int plane_width;
/***********/
/* Y Plane */
/***********/
Border = ybf->border;
plane_stride = ybf->y_stride;
plane_height = ybf->y_height;
plane_width = ybf->y_width;
/* copy the left and right most columns out */
src_ptr1 = ybf->y_buffer;
src_ptr2 = src_ptr1 + plane_width - 1;
dest_ptr1 = src_ptr1 - Border;
dest_ptr2 = src_ptr2 + 1;
for (i = 0; i < plane_height; i++)
{
vpx_memset(dest_ptr1, src_ptr1[0], Border);
vpx_memset(dest_ptr2, src_ptr2[0], Border);
src_ptr1 += plane_stride;
src_ptr2 += plane_stride;
dest_ptr1 += plane_stride;
dest_ptr2 += plane_stride;
}
/* Now copy the top and bottom source lines into each line of the respective borders */
src_ptr1 = ybf->y_buffer - Border;
src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
dest_ptr1 = src_ptr1 - (Border * plane_stride);
dest_ptr2 = src_ptr2 + plane_stride;
for (i = 0; i < (int)Border; i++)
{
vpx_memcpy(dest_ptr1, src_ptr1, plane_stride);
vpx_memcpy(dest_ptr2, src_ptr2, plane_stride);
dest_ptr1 += plane_stride;
dest_ptr2 += plane_stride;
}
/***********/
/* U Plane */
/***********/
plane_stride = ybf->uv_stride;
plane_height = ybf->uv_height;
plane_width = ybf->uv_width;
Border /= 2;
/* copy the left and right most columns out */
src_ptr1 = ybf->u_buffer;
src_ptr2 = src_ptr1 + plane_width - 1;
dest_ptr1 = src_ptr1 - Border;
dest_ptr2 = src_ptr2 + 1;
for (i = 0; i < plane_height; i++)
{
vpx_memset(dest_ptr1, src_ptr1[0], Border);
vpx_memset(dest_ptr2, src_ptr2[0], Border);
src_ptr1 += plane_stride;
src_ptr2 += plane_stride;
dest_ptr1 += plane_stride;
dest_ptr2 += plane_stride;
}
/* Now copy the top and bottom source lines into each line of the respective borders */
src_ptr1 = ybf->u_buffer - Border;
src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
dest_ptr1 = src_ptr1 - (Border * plane_stride);
dest_ptr2 = src_ptr2 + plane_stride;
for (i = 0; i < (int)(Border); i++)
{
vpx_memcpy(dest_ptr1, src_ptr1, plane_stride);
vpx_memcpy(dest_ptr2, src_ptr2, plane_stride);
dest_ptr1 += plane_stride;
dest_ptr2 += plane_stride;
}
/***********/
/* V Plane */
/***********/
/* copy the left and right most columns out */
src_ptr1 = ybf->v_buffer;
src_ptr2 = src_ptr1 + plane_width - 1;
dest_ptr1 = src_ptr1 - Border;
dest_ptr2 = src_ptr2 + 1;
for (i = 0; i < plane_height; i++)
{
vpx_memset(dest_ptr1, src_ptr1[0], Border);
vpx_memset(dest_ptr2, src_ptr2[0], Border);
src_ptr1 += plane_stride;
src_ptr2 += plane_stride;
dest_ptr1 += plane_stride;
dest_ptr2 += plane_stride;
}
/* Now copy the top and bottom source lines into each line of the respective borders */
src_ptr1 = ybf->v_buffer - Border;
src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
dest_ptr1 = src_ptr1 - (Border * plane_stride);
dest_ptr2 = src_ptr2 + plane_stride;
for (i = 0; i < (int)(Border); i++)
{
vpx_memcpy(dest_ptr1, src_ptr1, plane_stride);
vpx_memcpy(dest_ptr2, src_ptr2, plane_stride);
dest_ptr1 += plane_stride;
dest_ptr2 += plane_stride;
}
}
static void
extend_frame_borders_yonly_c(YV12_BUFFER_CONFIG *ybf)
{
int i;
unsigned char *src_ptr1, *src_ptr2;
unsigned char *dest_ptr1, *dest_ptr2;
unsigned int Border;
int plane_stride;
int plane_height;
int plane_width;
/***********/
/* Y Plane */
/***********/
Border = ybf->border;
plane_stride = ybf->y_stride;
plane_height = ybf->y_height;
plane_width = ybf->y_width;
/* copy the left and right most columns out */
src_ptr1 = ybf->y_buffer;
src_ptr2 = src_ptr1 + plane_width - 1;
dest_ptr1 = src_ptr1 - Border;
dest_ptr2 = src_ptr2 + 1;
for (i = 0; i < plane_height; i++)
{
vpx_memset(dest_ptr1, src_ptr1[0], Border);
vpx_memset(dest_ptr2, src_ptr2[0], Border);
src_ptr1 += plane_stride;
src_ptr2 += plane_stride;
dest_ptr1 += plane_stride;
dest_ptr2 += plane_stride;
}
/* Now copy the top and bottom source lines into each line of the respective borders */
src_ptr1 = ybf->y_buffer - Border;
src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
dest_ptr1 = src_ptr1 - (Border * plane_stride);
dest_ptr2 = src_ptr2 + plane_stride;
for (i = 0; i < (int)Border; i++)
{
vpx_memcpy(dest_ptr1, src_ptr1, plane_stride);
vpx_memcpy(dest_ptr2, src_ptr2, plane_stride);
dest_ptr1 += plane_stride;
dest_ptr2 += plane_stride;
}
plane_stride /= 2;
plane_height /= 2;
plane_width /= 2;
Border /= 2;
}
/****************************************************************************
*
* ROUTINE : vp8_yv12_copy_frame
*
* INPUTS :
*
* OUTPUTS : None.
*
* RETURNS : void
*
* FUNCTION : Copies the source image into the destination image and
* updates the destination's UMV borders.
*
* SPECIAL NOTES : The frames are assumed to be identical in size.
*
****************************************************************************/
void
vp8_yv12_copy_frame_c(YV12_BUFFER_CONFIG *src_ybc, YV12_BUFFER_CONFIG *dst_ybc)
{
int row;
unsigned char *source, *dest;
source = src_ybc->y_buffer;
dest = dst_ybc->y_buffer;
for (row = 0; row < src_ybc->y_height; row++)
{
vpx_memcpy(dest, source, src_ybc->y_width);
source += src_ybc->y_stride;
dest += dst_ybc->y_stride;
}
source = src_ybc->u_buffer;
dest = dst_ybc->u_buffer;
for (row = 0; row < src_ybc->uv_height; row++)
{
vpx_memcpy(dest, source, src_ybc->uv_width);
source += src_ybc->uv_stride;
dest += dst_ybc->uv_stride;
}
source = src_ybc->v_buffer;
dest = dst_ybc->v_buffer;
for (row = 0; row < src_ybc->uv_height; row++)
{
vpx_memcpy(dest, source, src_ybc->uv_width);
source += src_ybc->uv_stride;
dest += dst_ybc->uv_stride;
}
vp8_yv12_extend_frame_borders_c(dst_ybc);
}
void vp8_yv12_copy_y_c(YV12_BUFFER_CONFIG *src_ybc, YV12_BUFFER_CONFIG *dst_ybc)
{
int row;
unsigned char *source, *dest;
source = src_ybc->y_buffer;
dest = dst_ybc->y_buffer;
for (row = 0; row < src_ybc->y_height; row++)
{
vpx_memcpy(dest, source, src_ybc->y_width);
source += src_ybc->y_stride;
dest += dst_ybc->y_stride;
}
}