michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: #include "vp8/common/loopfilter.h"
michael@0: #include "vpx_scale/yv12config.h"
michael@0: 
michael@0: extern void vp8_memcpy_partial_neon(unsigned char *dst_ptr,
michael@0:                                     unsigned char *src_ptr,
michael@0:                                     int sz);
michael@0: 
michael@0: 
michael@0: void vp8_yv12_copy_partial_frame_neon(YV12_BUFFER_CONFIG *src_ybc,
michael@0:                                       YV12_BUFFER_CONFIG *dst_ybc)
michael@0: {
michael@0:     unsigned char *src_y, *dst_y;
michael@0:     int yheight;
michael@0:     int ystride;
michael@0:     int yoffset;
michael@0:     int linestocopy;
michael@0: 
michael@0:     yheight  = src_ybc->y_height;
michael@0:     ystride  = src_ybc->y_stride;
michael@0: 
michael@0:     /* number of MB rows to use in partial filtering */
michael@0:     linestocopy = (yheight >> 4) / PARTIAL_FRAME_FRACTION;
michael@0:     linestocopy = linestocopy ? linestocopy << 4 : 16;     /* 16 lines per MB */
michael@0: 
michael@0:     /* Copy extra 4 so that full filter context is available if filtering done
michael@0:      * on the copied partial frame and not original. Partial filter does mb
michael@0:      * filtering for top row also, which can modify3 pixels above.
michael@0:      */
michael@0:     linestocopy += 4;
michael@0:     /* partial image starts at ~middle of frame (macroblock border) */
michael@0:     yoffset  = ystride * (((yheight >> 5) * 16) - 4);
michael@0:     src_y = src_ybc->y_buffer + yoffset;
michael@0:     dst_y = dst_ybc->y_buffer + yoffset;
michael@0: 
michael@0:     vp8_memcpy_partial_neon(dst_y, src_y, ystride * linestocopy);
michael@0: }