return 0;
}
-int ff_init_slice_from_src(SwsSlice * s, uint8_t *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH)
+int ff_init_slice_from_src(SwsSlice * s, uint8_t *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH, int relative)
{
int i = 0;
chrY + chrH,
lumY + lumH};
+ const uint8_t *src_[4] = {src[0] + (relative ? 0 : start[0]) * stride[0],
+ src[1] + (relative ? 0 : start[1]) * stride[0],
+ src[2] + (relative ? 0 : start[2]) * stride[0],
+ src[3] + (relative ? 0 : start[3]) * stride[0]};
+
s->width = srcW;
for (i = 0; i < 4; ++i) {
int j;
- int lines = end[i];
- lines = s->plane[i].available_lines < lines ? s->plane[i].available_lines : lines;
+ int first = s->plane[i].sliceY;
+ int n = s->plane[i].available_lines;
+ int lines = end[i] - start[i];
+ int tot_lines = end[i] - first;
- if (end[i] > s->plane[i].sliceY+s->plane[i].sliceH) {
- if (start[i] <= s->plane[i].sliceY+1)
- s->plane[i].sliceY = FFMIN(start[i], s->plane[i].sliceY);
- else
- s->plane[i].sliceY = start[i];
- s->plane[i].sliceH = end[i] - s->plane[i].sliceY;
+ if (start[i] >= first && n >= tot_lines) {
+ s->plane[i].sliceH = FFMAX(tot_lines, s->plane[i].sliceH);
+ for (j = 0; j < lines; j+= 1)
+ s->plane[i].line[start[i] - first + j] = src_[i] + j * stride[i];
} else {
- if (end[i] >= s->plane[i].sliceY)
- s->plane[i].sliceH = s->plane[i].sliceY + s->plane[i].sliceH - start[i];
- else
- s->plane[i].sliceH = end[i] - start[i];
s->plane[i].sliceY = start[i];
+ lines = lines > n ? n : lines;
+ s->plane[i].sliceH = lines;
+ for (j = 0; j < lines; j+= 1)
+ s->plane[i].line[j] = src_[i] + j * stride[i];
}
- for (j = start[i]; j < lines; j+= 1)
- s->plane[i].line[j] = src[i] + (start[i] + j) * stride[i];
-
}
return 0;