generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Moved row-specific computation of MV bounds out of col loop

Browse Source 
Moved the bounds computation on vertical MV component out
of the loop that processes MBs within a MB row.
This commit is contained in:
Adrian Grange 2010-09-29 13:03:07 +01:00
parent 47fc8f2683
commit 0e7c45b391
1 changed files with 18 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
vp8/encoder/encodeframe.c
View File

@ -400,21 +400,31 @@ void encode_mb_row(VP8_COMP *cpi,
cpi->tplist[mb_row].start = *tp;
//printf("Main mb_row = %d\n", mb_row);
// for each macroblock col in image
for (mb_col = 0; mb_col < cm->mb_cols; mb_col++)
{
// Distance of Mb to the various image edges.
// These specified to 8th pel as they are always compared to values that are in 1/8th pel units
xd->mb_to_left_edge = -((mb_col * 16) << 3);
xd->mb_to_right_edge = ((cm->mb_cols - 1 - mb_col) * 16) << 3;
// Distance of Mb to the top & bottom edges, specified in 1/8th pel
// units as they are always compared to values that are in 1/8th pel units
xd->mb_to_top_edge = -((mb_row * 16) << 3);
xd->mb_to_bottom_edge = ((cm->mb_rows - 1 - mb_row) * 16) << 3;
// Set up limit values for motion vectors used to prevent them extending outside the UMV borders
x->mv_col_min = -((mb_col * 16) + (VP8BORDERINPIXELS - 16));
x->mv_col_max = ((cm->mb_cols - 1 - mb_col) * 16) + (VP8BORDERINPIXELS - 16);
// Set up limit values for vertical motion vector components
// to prevent them extending beyond the UMV borders
x->mv_row_min = -((mb_row * 16) + (VP8BORDERINPIXELS - 16));
x->mv_row_max = ((cm->mb_rows - 1 - mb_row) * 16) + (VP8BORDERINPIXELS - 16);
x->mv_row_max = ((cm->mb_rows - 1 - mb_row) * 16)
+ (VP8BORDERINPIXELS - 16);
// for each macroblock col in image
for (mb_col = 0; mb_col < cm->mb_cols; mb_col++)
{
// Distance of Mb to the left & right edges, specified in
// 1/8th pel units as they are always compared to values
// that are in 1/8th pel units
xd->mb_to_left_edge = -((mb_col * 16) << 3);
xd->mb_to_right_edge = ((cm->mb_cols - 1 - mb_col) * 16) << 3;
// Set up limit values for horizontal motion vector components
// to prevent them extending beyond the UMV borders
x->mv_col_min = -((mb_col * 16) + (VP8BORDERINPIXELS - 16));
x->mv_col_max = ((cm->mb_cols - 1 - mb_col) * 16)
+ (VP8BORDERINPIXELS - 16);
xd->dst.y_buffer = cm->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset;
xd->dst.u_buffer = cm->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset;