/media/libvpx/vpx_scale/generic/yv12extend.c
http://github.com/zpao/v8monkey · C · 280 lines · 183 code · 46 blank · 51 comment · 12 complexity · d861b03b506dd17845b81c6399924123 MD5 · raw file
- /*
- * 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(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(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(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_ptr(dst_ybc);
- }
- void
- vp8_yv12_copy_frame_yonly(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;
- }
- extend_frame_borders_yonly(dst_ybc);
- }