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/*
* 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 AOM_AV1_COMMON_RESIZE_H_
#define AOM_AV1_COMMON_RESIZE_H_
#include <stdio.h>
#include "aom/aom_integer.h"
#include "av1/common/av1_common_int.h"
#ifdef __cplusplus
extern "C" {
#endif
// Filters for factor of 2 downsampling.
static const int16_t av1_down2_symeven_half_filter[] = { 56, 12, -3, -1 };
static const int16_t av1_down2_symodd_half_filter[] = { 64, 35, 0, -3 };
bool av1_resize_plane(const uint8_t *input, int height, int width,
int in_stride, uint8_t *output, int height2, int width2,
int out_stride);
// TODO(aomedia:3228): In libaom 4.0.0, remove av1_resize_frame420 from
// av1/exports_com and delete this function.
void av1_resize_frame420(const uint8_t *y, int y_stride, const uint8_t *u,
const uint8_t *v, int uv_stride, int height, int width,
uint8_t *oy, int oy_stride, uint8_t *ou, uint8_t *ov,
int ouv_stride, int oheight, int owidth);
bool av1_resize_frame422(const uint8_t *y, int y_stride, const uint8_t *u,
const uint8_t *v, int uv_stride, int height, int width,
uint8_t *oy, int oy_stride, uint8_t *ou, uint8_t *ov,
int ouv_stride, int oheight, int owidth);
bool av1_resize_frame444(const uint8_t *y, int y_stride, const uint8_t *u,
const uint8_t *v, int uv_stride, int height, int width,
uint8_t *oy, int oy_stride, uint8_t *ou, uint8_t *ov,
int ouv_stride, int oheight, int owidth);
void av1_highbd_resize_plane(const uint8_t *input, int height, int width,
int in_stride, uint8_t *output, int height2,
int width2, int out_stride, int bd);
void av1_highbd_resize_frame420(const uint8_t *y, int y_stride,
const uint8_t *u, const uint8_t *v,
int uv_stride, int height, int width,
uint8_t *oy, int oy_stride, uint8_t *ou,
uint8_t *ov, int ouv_stride, int oheight,
int owidth, int bd);
void av1_highbd_resize_frame422(const uint8_t *y, int y_stride,
const uint8_t *u, const uint8_t *v,
int uv_stride, int height, int width,
uint8_t *oy, int oy_stride, uint8_t *ou,
uint8_t *ov, int ouv_stride, int oheight,
int owidth, int bd);
void av1_highbd_resize_frame444(const uint8_t *y, int y_stride,
const uint8_t *u, const uint8_t *v,
int uv_stride, int height, int width,
uint8_t *oy, int oy_stride, uint8_t *ou,
uint8_t *ov, int ouv_stride, int oheight,
int owidth, int bd);
void av1_upscale_normative_rows(const AV1_COMMON *cm, const uint8_t *src,
int src_stride, uint8_t *dst, int dst_stride,
int plane, int rows);
void av1_upscale_normative_and_extend_frame(const AV1_COMMON *cm,
const YV12_BUFFER_CONFIG *src,
YV12_BUFFER_CONFIG *dst);
YV12_BUFFER_CONFIG *av1_realloc_and_scale_if_required(
AV1_COMMON *cm, YV12_BUFFER_CONFIG *unscaled, YV12_BUFFER_CONFIG *scaled,
const InterpFilter filter, const int phase, const bool use_optimized_scaler,
const bool for_psnr, const int border_in_pixels, const bool alloc_pyramid);
bool av1_resize_and_extend_frame_nonnormative(const YV12_BUFFER_CONFIG *src,
YV12_BUFFER_CONFIG *dst, int bd,
int num_planes);
// Calculates the scaled dimensions from the given original dimensions and the
// resize scale denominator.
void av1_calculate_scaled_size(int *width, int *height, int resize_denom);
// Similar to above, but calculates scaled dimensions after superres from the
// given original dimensions and superres scale denominator.
void av1_calculate_scaled_superres_size(int *width, int *height,
int superres_denom);
// Inverse of av1_calculate_scaled_superres_size() above: calculates the
// original dimensions from the given scaled dimensions and the scale
// denominator.
void av1_calculate_unscaled_superres_size(int *width, int *height, int denom);
void av1_superres_upscale(AV1_COMMON *cm, BufferPool *const pool,
bool alloc_pyramid);
bool av1_resize_plane_to_half(const uint8_t *const input, int height, int width,
int in_stride, uint8_t *output, int height2,
int width2, int out_stride);
bool should_resize_by_half(int height, int width, int height2, int width2);
// Returns 1 if a superres upscaled frame is scaled and 0 otherwise.
static INLINE int av1_superres_scaled(const AV1_COMMON *cm) {
// Note: for some corner cases (e.g. cm->width of 1), there may be no scaling
// required even though cm->superres_scale_denominator != SCALE_NUMERATOR.
// So, the following check is more accurate.
return (cm->width != cm->superres_upscaled_width);
}
// The optimized scaler av1_resize_and_extend_frame() can only handle scaling
// ratios >= 1/4 and <= 16. See comment in aom_convolve8_c() for detail.
// Visual assessment shows that if the scaling ratio or its reciprocal is not a
// multiple of 1/16, there are some artifacts in the output of the optimized
// scaler, especially on lines, due to non-exact ratio representation. SSSE3
// and NEON have a specialized 3/4 version of av1_resize_and_extend_frame()
// that does not have this issue.
//
// Use the non-normative scaler av1_resize_and_extend_frame_nonnormative()
// for other scaling ratios.
static INLINE bool av1_has_optimized_scaler(const int src_width,
const int src_height,
const int dst_width,
const int dst_height) {
bool has_optimized_scaler =
(dst_width * 4 >= src_width && dst_height * 4 >= src_height) &&
(dst_width <= src_width * 16 && dst_height <= src_height * 16) &&
(16 * dst_width % src_width == 0) && (16 * src_width % dst_width == 0) &&
(16 * dst_height % src_height == 0) &&
(16 * src_height % dst_height == 0);
#if HAVE_SSSE3 || HAVE_NEON
has_optimized_scaler =
has_optimized_scaler ||
(4 * dst_width == 3 * src_width && 4 * dst_height == 3 * src_height);
#endif
return has_optimized_scaler;
}
#define UPSCALE_NORMATIVE_TAPS 8
extern const int16_t av1_resize_filter_normative[1 << RS_SUBPEL_BITS]
[UPSCALE_NORMATIVE_TAPS];
int32_t av1_get_upscale_convolve_step(int in_length, int out_length);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_COMMON_RESIZE_H_
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