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Start adding sad calculation outside frame.

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Works for top-left corner. 2/9 tests pass.
This commit is contained in:
Ari Koivula 2013-10-10 16:11:07 +03:00
parent 356a0e8a14
commit 684f6d548c
1 changed files with 87 additions and 4 deletions
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91
src/search.c
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@ -36,6 +36,51 @@
&& (x) + (block_width) <= (width) \
&& (y) + (block_height) <= (height))
unsigned corner_sad(unsigned char* pic_data, unsigned char* ref_data,
unsigned block_width, unsigned block_height, unsigned width)
{
unsigned char ref = *ref_data;
unsigned x, y;
unsigned sad = 0;
for (y = 0; y < block_height; ++y) {
for (x = 0; x < block_width; ++x) {
sad += abs(pic_data[y * width + x] - ref);
}
}
return sad;
}
unsigned vertical_sad(unsigned char* pic_data, unsigned char* ref_data,
unsigned block_width, unsigned block_height, unsigned width)
{
unsigned x, y;
unsigned sad = 0;
for (y = 0; y < block_height; ++y) {
for (x = 0; x < block_width; ++x) {
sad += abs(pic_data[y * width + x] - ref_data[x]);
}
}
return sad;
}
unsigned horizontal_sad(unsigned char* pic_data, unsigned char* ref_data,
unsigned block_width, unsigned block_height, unsigned width)
{
unsigned x, y;
unsigned sad = 0;
for (y = 0; y < block_height; ++y) {
for (x = 0; x < block_width; ++x) {
sad += abs(pic_data[y * width + x] - ref_data[y * width]);
}
}
return sad;
}
/**
* \brief Get Sum of Absolute Differences (SAD) between two blocks in two
@ -56,15 +101,53 @@ unsigned get_block_sad(picture *pic, picture *ref,
uint8_t *pic_data, *ref_data;
int width = pic->width;
int height = pic->height;
int left = ref_x < 0;
int right = ref_x + block_width > width;
int top = ref_y < 0;
int bottom = ref_y + block_height > height;
unsigned result = 0;
// 0 means invalid, for now.
if (!IN_FRAME(ref_x, ref_y, width, height, block_width, block_height)) return 0;
//if (!IN_FRAME(ref_x, ref_y, width, height, block_width, block_height)) return 0;
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);
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);
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);
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);
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);
} else if (top) {
} else if (top && right) {
} else if (left) {
} else if (right) {
} else if (bottom && left) {
} else if (bottom) {
} 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);
}
#if USE_CHROMA_IN_MV_SEARCH
// Halve everything because chroma is half the resolution.