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Simplify reference buffer calculation.

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This commit is contained in:
Ari Koivula 2013-10-10 18:30:29 +03:00
parent 684f6d548c
commit 1fcb452479
1 changed files with 17 additions and 15 deletions
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32
src/search.c
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@ -99,6 +99,8 @@ unsigned get_block_sad(picture *pic, picture *ref,
int block_width, int block_height)
{
uint8_t *pic_data, *ref_data;
int mv_x = ref_x - pic_x;
int mv_y = ref_y - pic_y;
int width = pic->width;
int height = pic->height;
int left = ref_x < 0;
@ -108,25 +110,27 @@ unsigned get_block_sad(picture *pic, picture *ref,
unsigned result = 0;
// Center both picture buffer and reference buffer to the picture block, so
// that further references are relative to the block rather than the
// top-left corner of the picture.
pic_data = &pic->y_data[pic_y * width + pic_x];
ref_data = &ref->y_data[pic_y * width + pic_x];
// 0 means invalid, for now.
//if (!IN_FRAME(ref_x, ref_y, width, height, block_width, block_height)) return 0;
if (left && top) {
pic_data = &pic->y_data[0];
ref_data = &ref->y_data[0];
result += corner_sad(pic_data, ref_data, -ref_x, -ref_y, width);
result += corner_sad(pic_data, ref_data,
-ref_x, -ref_y, width);
pic_data = &pic->y_data[-ref_x];
ref_data = &ref->y_data[0];
result += vertical_sad(pic_data, ref_data, block_width + ref_x, -ref_y, width);
result += vertical_sad(&pic_data[-ref_x], ref_data,
block_width - -ref_x, -ref_y, width);
pic_data = &pic->y_data[-ref_y * width];
ref_data = &ref->y_data[0];
result += horizontal_sad(pic_data, ref_data, -ref_x, block_height + ref_y, width);
result += horizontal_sad(&pic_data[-ref_y * width], ref_data,
-ref_x, block_height - -ref_y, width);
pic_data = &pic->y_data[(pic_y - ref_y) * width + pic_x - ref_x];
ref_data = &ref->y_data[0];
result += sad(pic_data, ref_data, block_width + ref_x, block_height + ref_y, width);
result += sad(&pic_data[-ref_y * width + -ref_x], ref_data,
block_width - -ref_x, block_height - -ref_y, width);
} else if (top) {
} else if (top && right) {
@ -142,9 +146,7 @@ unsigned get_block_sad(picture *pic, picture *ref,
} else if (bottom && right) {
} else {
pic_data = &pic->y_data[pic_y * width + pic_x];
ref_data = &ref->y_data[ref_y * width + ref_x];
result += sad(pic_data, ref_data, block_width, block_height, width);
result += sad(pic_data, &ref_data[mv_y * width + mv_x], block_width, block_height, width);
}