| 83 | } |
| 84 | |
| 85 | std::tuple<float, int, float, int> ResizeBase::get_nearest_linear_coord( |
| 86 | InterpolationMode imode, float scale, int size, int idx) { |
| 87 | if (size == 1) { |
| 88 | return std::make_tuple(1.0f, 0, 0.0f, 0); |
| 89 | } |
| 90 | |
| 91 | float alpha = (idx + 0.5f) / scale - 0.5f; |
| 92 | int origin_idx = static_cast<int>(floor(alpha)); |
| 93 | alpha -= origin_idx; |
| 94 | |
| 95 | if (imode == InterpolationMode::INTER_NEAREST) { |
| 96 | origin_idx = get_nearest_src(scale, size, idx); |
| 97 | alpha = 0; |
| 98 | } |
| 99 | |
| 100 | if (origin_idx < 0) { |
| 101 | origin_idx = 0; |
| 102 | alpha = 0; |
| 103 | } else if (origin_idx + 1 >= size) { |
| 104 | origin_idx = size - 2; |
| 105 | alpha = 1; |
| 106 | } |
| 107 | |
| 108 | return std::make_tuple(1 - alpha, origin_idx, alpha, origin_idx + 1); |
| 109 | } |
| 110 | |
| 111 | int ResizeBase::get_nearest_src(float scale, int size, int idx) { |
| 112 | return std::min(static_cast<int>(idx / scale), size - 1); |
nothing calls this directly
no test coverage detected