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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/aom/av1/common/scale.c | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/aom/av1/common/scale.c')
-rw-r--r-- | third_party/aom/av1/common/scale.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/scale.c b/third_party/aom/av1/common/scale.c new file mode 100644 index 0000000000..d7c6a24378 --- /dev/null +++ b/third_party/aom/av1/common/scale.c @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include "config/aom_dsp_rtcd.h" +#include "config/av1_rtcd.h" + +#include "av1/common/filter.h" +#include "av1/common/scale.h" +#include "aom_dsp/aom_filter.h" + +static int get_fixed_point_scale_factor(int other_size, int this_size) { + // Calculate scaling factor once for each reference frame + // and use fixed point scaling factors in decoding and encoding routines. + // Hardware implementations can calculate scale factor in device driver + // and use multiplication and shifting on hardware instead of division. + return ((other_size << REF_SCALE_SHIFT) + this_size / 2) / this_size; +} + +// Given the fixed point scale, calculate coarse point scale. +static int fixed_point_scale_to_coarse_point_scale(int scale_fp) { + return ROUND_POWER_OF_TWO(scale_fp, REF_SCALE_SHIFT - SCALE_SUBPEL_BITS); +} + +// Note: x and y are integer precision, mvq4 is q4 precision. +MV32 av1_scale_mv(const MV *mvq4, int x, int y, + const struct scale_factors *sf) { + const int x_off_q4 = av1_scaled_x(x << SUBPEL_BITS, sf); + const int y_off_q4 = av1_scaled_y(y << SUBPEL_BITS, sf); + const MV32 res = { + av1_scaled_y((y << SUBPEL_BITS) + mvq4->row, sf) - y_off_q4, + av1_scaled_x((x << SUBPEL_BITS) + mvq4->col, sf) - x_off_q4 + }; + return res; +} + +void av1_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w, + int other_h, int this_w, int this_h) { + if (!valid_ref_frame_size(other_w, other_h, this_w, this_h)) { + sf->x_scale_fp = REF_INVALID_SCALE; + sf->y_scale_fp = REF_INVALID_SCALE; + return; + } + + sf->x_scale_fp = get_fixed_point_scale_factor(other_w, this_w); + sf->y_scale_fp = get_fixed_point_scale_factor(other_h, this_h); + + sf->x_step_q4 = fixed_point_scale_to_coarse_point_scale(sf->x_scale_fp); + sf->y_step_q4 = fixed_point_scale_to_coarse_point_scale(sf->y_scale_fp); +} |