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Diffstat (limited to 'third_party/dav1d/src/ipred_prepare.h')
| -rw-r--r-- | third_party/dav1d/src/ipred_prepare.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/third_party/dav1d/src/ipred_prepare.h b/third_party/dav1d/src/ipred_prepare.h new file mode 100644 index 0000000000..6a7efeb3d7 --- /dev/null +++ b/third_party/dav1d/src/ipred_prepare.h @@ -0,0 +1,108 @@ +/* + * 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_PREPARE_H +#define DAV1D_SRC_IPRED_PREPARE_H + +#include <stddef.h> +#include <stdint.h> + +#include "common/bitdepth.h" + +#include "src/env.h" +#include "src/intra_edge.h" +#include "src/levels.h" + +/* + * Luma intra edge preparation. + * + * x/y/start/w/h are in luma block (4px) units: + * - x and y are the absolute block positions in the image; + * - start/w/h are the *dependent tile* boundary positions. In practice, start + * is the horizontal tile start, w is the horizontal tile end, the vertical + * tile start is assumed to be 0 and h is the vertical image end. + * + * edge_flags signals which edges are available for this transform-block inside + * the given partition, as well as for the partition inside the superblock + * structure. + * + * dst and stride are pointers to the top/left position of the current block, + * and can be used to locate the top, left, top/left, top/right and bottom/left + * edge pointers also. + * + * angle is the angle_delta [-3..3] on input, and the absolute angle on output. + * + * mode is the intra prediction mode as coded in the bitstream. The return value + * is this same mode, converted to an index in the DSP functions. + * + * tw/th are the size of the transform block in block (4px) units. + * + * topleft_out is a pointer to scratch memory that will be filled with the edge + * pixels. The memory array should have space to be indexed in the [-2*w,2*w] + * range, in the following order: + * - [0] will be the top/left edge pixel; + * - [1..w] will be the top edge pixels (1 being left-most, w being right-most); + * - [w+1..2*w] will be the top/right edge pixels; + * - [-1..-w] will be the left edge pixels (-1 being top-most, -w being bottom- + * most); + * - [-w-1..-2*w] will be the bottom/left edge pixels. + * Each edge may remain uninitialized if it is not used by the returned mode + * index. If edges are not available (because the edge position is outside the + * tile dimensions or because edge_flags indicates lack of edge availability), + * they will be extended from nearby edges as defined by the av1 spec. + */ +enum IntraPredMode + bytefn(dav1d_prepare_intra_edges)(int x, int have_left, int y, int have_top, + int w, int h, enum EdgeFlags edge_flags, + const pixel *dst, ptrdiff_t stride, + const pixel *prefilter_toplevel_sb_edge, + enum IntraPredMode mode, int *angle, + int tw, int th, int filter_edge, + pixel *topleft_out HIGHBD_DECL_SUFFIX); + +// These flags are OR'd with the angle argument into intra predictors. +// ANGLE_USE_EDGE_FILTER_FLAG signals that edges should be convolved +// with a filter before using them to predict values in a block. +// ANGLE_SMOOTH_EDGE_FLAG means that edges are smooth and should use +// reduced filter strength. +#define ANGLE_USE_EDGE_FILTER_FLAG 1024 +#define ANGLE_SMOOTH_EDGE_FLAG 512 + +static inline int sm_flag(const BlockContext *const b, const int idx) { + if (!b->intra[idx]) return 0; + const enum IntraPredMode m = b->mode[idx]; + return (m == SMOOTH_PRED || m == SMOOTH_H_PRED || + m == SMOOTH_V_PRED) ? ANGLE_SMOOTH_EDGE_FLAG : 0; +} + +static inline int sm_uv_flag(const BlockContext *const b, const int idx) { + const enum IntraPredMode m = b->uvmode[idx]; + return (m == SMOOTH_PRED || m == SMOOTH_H_PRED || + m == SMOOTH_V_PRED) ? ANGLE_SMOOTH_EDGE_FLAG : 0; +} + +#endif /* DAV1D_SRC_IPRED_PREPARE_H */ |