ipred.h (3495B)
1 /* 2 * Copyright © 2018-2021, VideoLAN and dav1d authors 3 * Copyright © 2018, Two Orioles, LLC 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright notice, this 10 * list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef DAV1D_SRC_IPRED_H 29 #define DAV1D_SRC_IPRED_H 30 31 #include <stddef.h> 32 33 #include "common/bitdepth.h" 34 35 #include "src/levels.h" 36 37 /* 38 * Intra prediction. 39 * - a is the angle (in degrees) for directional intra predictors. For other 40 * modes, it is ignored; 41 * - topleft is the same as the argument given to dav1d_prepare_intra_edges(), 42 * see ipred_prepare.h for more detailed documentation. 43 */ 44 #define decl_angular_ipred_fn(name) \ 45 void (name)(pixel *dst, ptrdiff_t stride, const pixel *topleft, \ 46 int width, int height, int angle, int max_width, int max_height \ 47 HIGHBD_DECL_SUFFIX) 48 typedef decl_angular_ipred_fn(*angular_ipred_fn); 49 50 /* 51 * Create a subsampled Y plane with the DC subtracted. 52 * - w/h_pad is the edge of the width/height that extends outside the visible 53 * portion of the frame in 4px units; 54 * - ac has a stride of 16. 55 */ 56 #define decl_cfl_ac_fn(name) \ 57 void (name)(int16_t *ac, const pixel *y, ptrdiff_t stride, \ 58 int w_pad, int h_pad, int cw, int ch) 59 typedef decl_cfl_ac_fn(*cfl_ac_fn); 60 61 /* 62 * dst[x,y] += alpha * ac[x,y] 63 * - alpha contains a q3 scalar in [-16,16] range; 64 */ 65 #define decl_cfl_pred_fn(name) \ 66 void (name)(pixel *dst, ptrdiff_t stride, const pixel *topleft, \ 67 int width, int height, const int16_t *ac, int alpha \ 68 HIGHBD_DECL_SUFFIX) 69 typedef decl_cfl_pred_fn(*cfl_pred_fn); 70 71 /* 72 * dst[x,y] = pal[idx[x,y]] 73 * - palette indices are [0-7] 74 * - only 16-byte alignment is guaranteed for idx. 75 */ 76 #define decl_pal_pred_fn(name) \ 77 void (name)(pixel *dst, ptrdiff_t stride, const pixel *pal, \ 78 const uint8_t *idx, int w, int h) 79 typedef decl_pal_pred_fn(*pal_pred_fn); 80 81 typedef struct Dav1dIntraPredDSPContext { 82 angular_ipred_fn intra_pred[N_IMPL_INTRA_PRED_MODES]; 83 84 // chroma-from-luma 85 cfl_ac_fn cfl_ac[3 /* 420, 422, 444 */]; 86 cfl_pred_fn cfl_pred[DC_128_PRED + 1]; 87 88 // palette 89 pal_pred_fn pal_pred; 90 } Dav1dIntraPredDSPContext; 91 92 bitfn_decls(void dav1d_intra_pred_dsp_init, Dav1dIntraPredDSPContext *c); 93 94 #endif /* DAV1D_SRC_IPRED_H */