ref: e2d329fbeb0084432041782902a82f9cea884cbe
dir: /src/ipred.h/
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __DAV1D_SRC_IPRED_H__
#define __DAV1D_SRC_IPRED_H__
#include "common/bitdepth.h"
#include "src/levels.h"
/*
* Intra prediction.
* - a is the angle (in degrees) for directional intra predictors. For other
* modes, it is ignored;
* - topleft is the same as the argument given to dav1d_prepare_intra_edges(),
* see ipred_prepare.h for more detailed documentation.
*/
#define decl_angular_ipred_fn(name) \
void (name)(pixel *dst, ptrdiff_t stride, const pixel *topleft, int angle)
typedef decl_angular_ipred_fn(*angular_ipred_fn);
/*
* Create a subsampled Y plane with the DC subtracted.
* - w/h_pad is the edge of the width/height that extends outside the visible
* portion of the frame in 4px units;
* - ac has a stride of 16.
*/
#define decl_cfl_ac_fn(name) \
void (name)(int16_t *ac, const pixel *y, ptrdiff_t stride, \
int w_pad, int h_pad)
typedef decl_cfl_ac_fn(*cfl_ac_fn);
/*
* dst[plane][x,y] = dc[plane] + alpha[plane] * ac[x,y]
* - alphas contains two q3 scalars (one for each plane) in [-16,16] range;
* - dc_pred[] is the first line of each plane's DC prediction, the second plane
* starting at an offset of 16 * sizeof(pixel) bytes.
*/
#define decl_cfl_pred_fn(name) \
void (name)(pixel *u_dst, pixel *v_dst, ptrdiff_t stride, \
const int16_t *ac, const pixel *dc_pred, \
const int8_t *const alphas, const int height)
typedef decl_cfl_pred_fn(*cfl_pred_fn);
/*
* dst[x,y] = pal[idx[x,y]]
* - palette indices are [0-7]
*/
#define decl_pal_pred_fn(name) \
void (name)(pixel *dst, ptrdiff_t stride, const uint16_t *pal, \
const uint8_t *idx, const int w, const int h)
typedef decl_pal_pred_fn(*pal_pred_fn);
typedef struct Dav1dIntraPredDSPContext {
angular_ipred_fn intra_pred[N_RECT_TX_SIZES][N_IMPL_INTRA_PRED_MODES];
// chroma-from-luma
cfl_ac_fn cfl_ac[3 /* 420, 422, 444 */][N_RECT_TX_SIZES /* chroma tx size */];
cfl_pred_fn cfl_pred[4];
// palette
pal_pred_fn pal_pred;
} Dav1dIntraPredDSPContext;
void dav1d_intra_pred_dsp_init_8bpc(Dav1dIntraPredDSPContext *c);
void dav1d_intra_pred_dsp_init_10bpc(Dav1dIntraPredDSPContext *c);
#endif /* __DAV1D_SRC_IPRED_H__ */