diff options
Diffstat (limited to 'video/out/filter_kernels.c')
| -rw-r--r-- | video/out/filter_kernels.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/video/out/filter_kernels.c b/video/out/filter_kernels.c index 87fd129714..bfbd4e9465 100644 --- a/video/out/filter_kernels.c +++ b/video/out/filter_kernels.c @@ -142,14 +142,17 @@ static void mp_compute_weights(struct filter_kernel *filter, double f, } // Fill the given array with weights for the range [0.0, 1.0]. The array is -// interpreted as rectangular array of count * filter->size items. +// interpreted as rectangular array of count * filter->size items, with a +// stride of `stride` floats in between each array element. (For polar filters, +// the `count` indicates the row size and filter->size/stride are ignored) // // There will be slight sampling error if these weights are used in a OpenGL // texture as LUT directly. The sampling point of a texel is located at its // center, so out_array[0] will end up at 0.5 / count instead of 0.0. // Correct lookup requires a linear coordinate mapping from [0.0, 1.0] to // [0.5 / count, 1.0 - 0.5 / count]. -void mp_compute_lut(struct filter_kernel *filter, int count, float *out_array) +void mp_compute_lut(struct filter_kernel *filter, int count, int stride, + float *out_array) { if (filter->polar) { filter->radius_cutoff = 0.0; @@ -165,7 +168,7 @@ void mp_compute_lut(struct filter_kernel *filter, int count, float *out_array) // Compute a 2D array indexed by subpixel position for (int n = 0; n < count; n++) { mp_compute_weights(filter, n / (double)(count - 1), - out_array + filter->size * n); + out_array + stride * n); } } } |