ref: aaf204e550958bd0d750569182bd8e8a8512109f
dir: /vp8/encoder/arm/neon/picklpf_arm.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 "vp8/common/loopfilter.h"
#include "vpx_scale/yv12config.h"
extern void vp8_memcpy_partial_neon(unsigned char *dst_ptr,
unsigned char *src_ptr,
int sz);
void vp8_yv12_copy_partial_frame_neon(YV12_BUFFER_CONFIG *src_ybc,
YV12_BUFFER_CONFIG *dst_ybc)
{
unsigned char *src_y, *dst_y;
int yheight;
int ystride;
int yoffset;
int linestocopy;
yheight = src_ybc->y_height;
ystride = src_ybc->y_stride;
/* number of MB rows to use in partial filtering */
linestocopy = (yheight >> 4) / PARTIAL_FRAME_FRACTION;
linestocopy = linestocopy ? linestocopy << 4 : 16; /* 16 lines per MB */
/* Copy extra 4 so that full filter context is available if filtering done
* on the copied partial frame and not original. Partial filter does mb
* filtering for top row also, which can modify3 pixels above.
*/
linestocopy += 4;
/* partial image starts at ~middle of frame (macroblock border) */
yoffset = ystride * (((yheight >> 5) * 16) - 4);
src_y = src_ybc->y_buffer + yoffset;
dst_y = dst_ybc->y_buffer + yoffset;
vp8_memcpy_partial_neon(dst_y, src_y, ystride * linestocopy);
}