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/*
* Copyright 2011 The LibYuv 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 "libyuv/planar_functions.h"
#include <assert.h>
#include <string.h> // for memset()
#include "libyuv/row.h"
#include "libyuv/scale_row.h" // for ScaleRowDown2
// Copy a plane of data
void CopyPlane(const uint8_t* src_y,
int src_stride_y,
uint8_t* dst_y,
int dst_stride_y,
int width,
int height) {
int y;
void (*CopyRow)(const uint8_t* src, uint8_t* dst, int width) = CopyRow_C;
if (width <= 0 || height == 0) {
return;
}
// Negative height means invert the image.
if (height < 0) {
height = -height;
dst_y = dst_y + (height - 1) * dst_stride_y;
dst_stride_y = -dst_stride_y;
}
// Coalesce rows.
if (src_stride_y == width && dst_stride_y == width) {
width *= height;
height = 1;
src_stride_y = dst_stride_y = 0;
}
// Nothing to do.
if (src_y == dst_y && src_stride_y == dst_stride_y) {
return;
}
// Copy plane
for (y = 0; y < height; ++y) {
CopyRow(src_y, dst_y, width);
src_y += src_stride_y;
dst_y += dst_stride_y;
}
}
void CopyPlane_16(const uint16_t* src_y,
int src_stride_y,
uint16_t* dst_y,
int dst_stride_y,
int width,
int height) {
CopyPlane((const uint8_t*)src_y, src_stride_y * 2, (uint8_t*)dst_y,
dst_stride_y * 2, width * 2, height);
}
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