From 68569dee1416593955c1570d638b3d9250b33012 Mon Sep 17 00:00:00 2001 From: trav90 Date: Mon, 15 Oct 2018 21:45:30 -0500 Subject: Import aom library This is the reference implementation for the Alliance for Open Media's av1 video code. The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36. --- third_party/aom/av1/common/scale.h | 72 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 third_party/aom/av1/common/scale.h (limited to 'third_party/aom/av1/common/scale.h') diff --git a/third_party/aom/av1/common/scale.h b/third_party/aom/av1/common/scale.h new file mode 100644 index 000000000..ea81efab0 --- /dev/null +++ b/third_party/aom/av1/common/scale.h @@ -0,0 +1,72 @@ +/* + * 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. + */ + +#ifndef AV1_COMMON_SCALE_H_ +#define AV1_COMMON_SCALE_H_ + +#include "av1/common/mv.h" +#include "aom_dsp/aom_convolve.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define REF_SCALE_SHIFT 14 +#define REF_NO_SCALE (1 << REF_SCALE_SHIFT) +#define REF_INVALID_SCALE -1 + +struct scale_factors { + int x_scale_fp; // horizontal fixed point scale factor + int y_scale_fp; // vertical fixed point scale factor + int x_step_q4; + int y_step_q4; + + int (*scale_value_x)(int val, const struct scale_factors *sf); + int (*scale_value_y)(int val, const struct scale_factors *sf); + + convolve_fn_t predict[2][2][2]; // horiz, vert, avg +#if CONFIG_HIGHBITDEPTH + highbd_convolve_fn_t highbd_predict[2][2][2]; // horiz, vert, avg +#endif // CONFIG_HIGHBITDEPTH +}; + +MV32 av1_scale_mv(const MV *mv, int x, int y, const struct scale_factors *sf); + +#if CONFIG_HIGHBITDEPTH +void av1_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w, + int other_h, int this_w, int this_h, + int use_high); +#else +void av1_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w, + int other_h, int this_w, int this_h); +#endif // CONFIG_HIGHBITDEPTH + +static INLINE int av1_is_valid_scale(const struct scale_factors *sf) { + return sf->x_scale_fp != REF_INVALID_SCALE && + sf->y_scale_fp != REF_INVALID_SCALE; +} + +static INLINE int av1_is_scaled(const struct scale_factors *sf) { + return av1_is_valid_scale(sf) && + (sf->x_scale_fp != REF_NO_SCALE || sf->y_scale_fp != REF_NO_SCALE); +} + +static INLINE int valid_ref_frame_size(int ref_width, int ref_height, + int this_width, int this_height) { + return 2 * this_width >= ref_width && 2 * this_height >= ref_height && + this_width <= 16 * ref_width && this_height <= 16 * ref_height; +} + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // AV1_COMMON_SCALE_H_ -- cgit v1.2.3