mirror of
https://github.com/FFmpeg/FFmpeg.git
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439 lines
23 KiB
C
439 lines
23 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* Copyright (c) 2011, 2012 Hyllian/Jararaca <sergiogdb@gmail.com>
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* Copyright (c) 2014 Arwa Arif <arwaarif1994@gmail.com>
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* XBR Filter is used for depixelization of image.
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* This is based on Hyllian's xBR shader.
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*
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* @see http://www.libretro.com/forums/viewtopic.php?f=6&t=134
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* @see https://github.com/yoyofr/iFBA/blob/master/fba_src/src/intf/video/scalers/xbr.cpp
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*/
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#include "libavutil/opt.h"
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#include "libavutil/avassert.h"
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#include "libavutil/pixdesc.h"
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#include "internal.h"
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#define LB_MASK 0x00FEFEFE
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#define RED_BLUE_MASK 0x00FF00FF
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#define GREEN_MASK 0x0000FF00
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#ifdef PI
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#undef PI
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#endif
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typedef int (*xbrfunc_t)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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typedef struct XBRContext {
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const AVClass *class;
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int n;
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xbrfunc_t func;
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uint32_t rgbtoyuv[1<<24];
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} XBRContext;
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typedef struct ThreadData {
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AVFrame *in, *out;
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const uint32_t *rgbtoyuv;
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} ThreadData;
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#define OFFSET(x) offsetof(XBRContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption xbr_options[] = {
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{ "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 4, .flags = FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(xbr);
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static uint32_t pixel_diff(uint32_t x, uint32_t y, const uint32_t *r2y)
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{
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#define YMASK 0xff0000
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#define UMASK 0x00ff00
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#define VMASK 0x0000ff
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#define ABSDIFF(a,b) (abs((int)(a)-(int)(b)))
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uint32_t yuv1 = r2y[x & 0xffffff];
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uint32_t yuv2 = r2y[y & 0xffffff];
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return (ABSDIFF(yuv1 & YMASK, yuv2 & YMASK) >> 16) +
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(ABSDIFF(yuv1 & UMASK, yuv2 & UMASK) >> 8) +
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ABSDIFF(yuv1 & VMASK, yuv2 & VMASK);
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}
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#define ALPHA_BLEND_128_W(a, b) ((((a) & LB_MASK) >> 1) + (((b) & LB_MASK) >> 1))
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#define ALPHA_BLEND_BASE(a, b, m, s) ( (RED_BLUE_MASK & (((a) & RED_BLUE_MASK) + (((((b) & RED_BLUE_MASK) - ((a) & RED_BLUE_MASK)) * (m)) >> (s)))) \
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| (GREEN_MASK & (((a) & GREEN_MASK) + (((((b) & GREEN_MASK) - ((a) & GREEN_MASK)) * (m)) >> (s)))))
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#define ALPHA_BLEND_32_W(a, b) ALPHA_BLEND_BASE(a, b, 1, 3)
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#define ALPHA_BLEND_64_W(a, b) ALPHA_BLEND_BASE(a, b, 1, 2)
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#define ALPHA_BLEND_192_W(a, b) ALPHA_BLEND_BASE(a, b, 3, 2)
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#define ALPHA_BLEND_224_W(a, b) ALPHA_BLEND_BASE(a, b, 7, 3)
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#define df(A, B) pixel_diff(A, B, r2y)
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#define eq(A, B) (df(A, B) < 155)
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#define FILT2(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
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N0, N1, N2, N3) do { \
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if (PE != PH && PE != PF) { \
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const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
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const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
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if (e <= i) { \
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const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
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if (e < i && (!eq(PF,PB) && !eq(PH,PD) || eq(PE,PI) \
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&& (!eq(PF,I4) && !eq(PH,I5)) \
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|| eq(PE,PG) || eq(PE,PC))) { \
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const unsigned ke = df(PF,PG); \
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const unsigned ki = df(PH,PC); \
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const int left = ke<<1 <= ki && PE != PG && PD != PG; \
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const int up = ke >= ki<<1 && PE != PC && PB != PC; \
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if (left && up) { \
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E[N3] = ALPHA_BLEND_224_W(E[N3], px); \
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E[N2] = ALPHA_BLEND_64_W( E[N2], px); \
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E[N1] = E[N2]; \
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} else if (left) { \
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E[N3] = ALPHA_BLEND_192_W(E[N3], px); \
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E[N2] = ALPHA_BLEND_64_W( E[N2], px); \
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} else if (up) { \
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E[N3] = ALPHA_BLEND_192_W(E[N3], px); \
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E[N1] = ALPHA_BLEND_64_W( E[N1], px); \
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} else { /* diagonal */ \
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E[N3] = ALPHA_BLEND_128_W(E[N3], px); \
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} \
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} else { \
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E[N3] = ALPHA_BLEND_128_W(E[N3], px); \
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} \
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} \
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} \
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} while (0)
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#define FILT3(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
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N0, N1, N2, N3, N4, N5, N6, N7, N8) do { \
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if (PE != PH && PE != PF) { \
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const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
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const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
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if (e <= i) { \
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const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
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if (e < i && (!eq(PF,PB) && !eq(PF,PC) || !eq(PH,PD) && !eq(PH,PG) || eq(PE,PI) \
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&& (!eq(PF,F4) && !eq(PF,I4) || !eq(PH,H5) && !eq(PH,I5)) \
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|| eq(PE,PG) || eq(PE,PC))) { \
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const unsigned ke = df(PF,PG); \
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const unsigned ki = df(PH,PC); \
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const int left = ke<<1 <= ki && PE != PG && PD != PG; \
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const int up = ke >= ki<<1 && PE != PC && PB != PC; \
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if (left && up) { \
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E[N7] = ALPHA_BLEND_192_W(E[N7], px); \
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E[N6] = ALPHA_BLEND_64_W( E[N6], px); \
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E[N5] = E[N7]; \
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E[N2] = E[N6]; \
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E[N8] = px; \
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} else if (left) { \
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E[N7] = ALPHA_BLEND_192_W(E[N7], px); \
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E[N5] = ALPHA_BLEND_64_W( E[N5], px); \
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E[N6] = ALPHA_BLEND_64_W( E[N6], px); \
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E[N8] = px; \
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} else if (up) { \
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E[N5] = ALPHA_BLEND_192_W(E[N5], px); \
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E[N7] = ALPHA_BLEND_64_W( E[N7], px); \
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E[N2] = ALPHA_BLEND_64_W( E[N2], px); \
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E[N8] = px; \
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} else { /* diagonal */ \
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E[N8] = ALPHA_BLEND_224_W(E[N8], px); \
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E[N5] = ALPHA_BLEND_32_W( E[N5], px); \
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E[N7] = ALPHA_BLEND_32_W( E[N7], px); \
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} \
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} else { \
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E[N8] = ALPHA_BLEND_128_W(E[N8], px); \
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} \
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} \
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} \
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} while (0)
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#define FILT4(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, \
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N15, N14, N11, N3, N7, N10, N13, N12, N9, N6, N2, N1, N5, N8, N4, N0) do { \
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if (PE != PH && PE != PF) { \
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const unsigned e = df(PE,PC) + df(PE,PG) + df(PI,H5) + df(PI,F4) + (df(PH,PF)<<2); \
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const unsigned i = df(PH,PD) + df(PH,I5) + df(PF,I4) + df(PF,PB) + (df(PE,PI)<<2); \
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if (e <= i) { \
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const unsigned px = df(PE,PF) <= df(PE,PH) ? PF : PH; \
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if (e < i && (!eq(PF,PB) && !eq(PH,PD) || eq(PE,PI) \
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&& (!eq(PF,I4) && !eq(PH,I5)) \
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|| eq(PE,PG) || eq(PE,PC))) { \
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const unsigned ke = df(PF,PG); \
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const unsigned ki = df(PH,PC); \
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const int left = ke<<1 <= ki && PE != PG && PD != PG; \
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const int up = ke >= ki<<1 && PE != PC && PB != PC; \
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if (left && up) { \
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E[N13] = ALPHA_BLEND_192_W(E[N13], px); \
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E[N12] = ALPHA_BLEND_64_W( E[N12], px); \
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E[N15] = E[N14] = E[N11] = px; \
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E[N10] = E[N3] = E[N12]; \
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E[N7] = E[N13]; \
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} else if (left) { \
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E[N11] = ALPHA_BLEND_192_W(E[N11], px); \
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E[N13] = ALPHA_BLEND_192_W(E[N13], px); \
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E[N10] = ALPHA_BLEND_64_W( E[N10], px); \
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E[N12] = ALPHA_BLEND_64_W( E[N12], px); \
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E[N14] = px; \
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E[N15] = px; \
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} else if (up) { \
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E[N14] = ALPHA_BLEND_192_W(E[N14], px); \
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E[N7 ] = ALPHA_BLEND_192_W(E[N7 ], px); \
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E[N10] = ALPHA_BLEND_64_W( E[N10], px); \
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E[N3 ] = ALPHA_BLEND_64_W( E[N3 ], px); \
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E[N11] = px; \
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E[N15] = px; \
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} else { /* diagonal */ \
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E[N11] = ALPHA_BLEND_128_W(E[N11], px); \
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E[N14] = ALPHA_BLEND_128_W(E[N14], px); \
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E[N15] = px; \
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} \
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} else { \
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E[N15] = ALPHA_BLEND_128_W(E[N15], px); \
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} \
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} \
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} \
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} while (0)
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static av_always_inline void xbr_filter(const ThreadData *td, int jobnr, int nb_jobs, int n)
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{
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int x, y;
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const AVFrame *input = td->in;
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AVFrame *output = td->out;
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const uint32_t *r2y = td->rgbtoyuv;
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const int slice_start = (input->height * jobnr ) / nb_jobs;
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const int slice_end = (input->height * (jobnr+1)) / nb_jobs;
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const int nl = output->linesize[0] >> 2;
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const int nl1 = nl + nl;
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const int nl2 = nl1 + nl;
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for (y = slice_start; y < slice_end; y++) {
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uint32_t *E = (uint32_t *)(output->data[0] + y * output->linesize[0] * n);
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const uint32_t *sa2 = (uint32_t *)(input->data[0] + y * input->linesize[0] - 8); /* center */
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const uint32_t *sa1 = sa2 - (input->linesize[0]>>2); /* up x1 */
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const uint32_t *sa0 = sa1 - (input->linesize[0]>>2); /* up x2 */
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const uint32_t *sa3 = sa2 + (input->linesize[0]>>2); /* down x1 */
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const uint32_t *sa4 = sa3 + (input->linesize[0]>>2); /* down x2 */
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if (y <= 1) {
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sa0 = sa1;
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if (y == 0) {
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sa0 = sa1 = sa2;
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}
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}
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if (y >= input->height - 2) {
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sa4 = sa3;
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if (y == input->height - 1) {
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sa4 = sa3 = sa2;
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}
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}
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for (x = 0; x < input->width; x++) {
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const uint32_t B1 = sa0[2];
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const uint32_t PB = sa1[2];
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const uint32_t PE = sa2[2];
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const uint32_t PH = sa3[2];
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const uint32_t H5 = sa4[2];
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const int pprev = 2 - (x > 0);
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const uint32_t A1 = sa0[pprev];
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const uint32_t PA = sa1[pprev];
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const uint32_t PD = sa2[pprev];
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const uint32_t PG = sa3[pprev];
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const uint32_t G5 = sa4[pprev];
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const int pprev2 = pprev - (x > 1);
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const uint32_t A0 = sa1[pprev2];
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const uint32_t D0 = sa2[pprev2];
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const uint32_t G0 = sa3[pprev2];
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const int pnext = 3 - (x == input->width - 1);
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const uint32_t C1 = sa0[pnext];
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const uint32_t PC = sa1[pnext];
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const uint32_t PF = sa2[pnext];
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const uint32_t PI = sa3[pnext];
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const uint32_t I5 = sa4[pnext];
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const int pnext2 = pnext + 1 - (x >= input->width - 2);
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const uint32_t C4 = sa1[pnext2];
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const uint32_t F4 = sa2[pnext2];
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const uint32_t I4 = sa3[pnext2];
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if (n == 2) {
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E[0] = E[1] = // 0, 1
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E[nl] = E[nl + 1] = PE; // 2, 3
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FILT2(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, 0, 1, nl, nl+1);
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FILT2(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, nl, 0, nl+1, 1);
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FILT2(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, nl+1, nl, 1, 0);
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FILT2(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, 1, nl+1, 0, nl);
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} else if (n == 3) {
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E[0] = E[1] = E[2] = // 0, 1, 2
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E[nl] = E[nl+1] = E[nl+2] = // 3, 4, 5
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E[nl1] = E[nl1+1] = E[nl1+2] = PE; // 6, 7, 8
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FILT3(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, 0, 1, 2, nl, nl+1, nl+2, nl1, nl1+1, nl1+2);
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FILT3(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, nl1, nl, 0, nl1+1, nl+1, 1, nl1+2, nl+2, 2);
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FILT3(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, nl1+2, nl1+1, nl1, nl+2, nl+1, nl, 2, 1, 0);
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FILT3(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, 2, nl+2, nl1+2, 1, nl+1, nl1+1, 0, nl, nl1);
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} else if (n == 4) {
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E[0] = E[1] = E[2] = E[3] = // 0, 1, 2, 3
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E[nl] = E[nl+1] = E[nl+2] = E[nl+3] = // 4, 5, 6, 7
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E[nl1] = E[nl1+1] = E[nl1+2] = E[nl1+3] = // 8, 9, 10, 11
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E[nl2] = E[nl2+1] = E[nl2+2] = E[nl2+3] = PE; // 12, 13, 14, 15
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FILT4(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, nl2+3, nl2+2, nl1+3, 3, nl+3, nl1+2, nl2+1, nl2, nl1+1, nl+2, 2, 1, nl+1, nl1, nl, 0);
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FILT4(PE, PC, PF, PB, PI, PA, PH, PD, PG, I4, A1, I5, H5, A0, D0, B1, C1, F4, C4, G5, G0, 3, nl+3, 2, 0, 1, nl+2, nl1+3, nl2+3, nl1+2, nl+1, nl, nl1, nl1+1, nl2+2, nl2+1, nl2);
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FILT4(PE, PA, PB, PD, PC, PG, PF, PH, PI, C1, G0, C4, F4, G5, H5, D0, A0, B1, A1, I4, I5, 0, 1, nl, nl2, nl1, nl+1, 2, 3, nl+2, nl1+1, nl2+1, nl2+2, nl1+2, nl+3, nl1+3, nl2+3);
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FILT4(PE, PG, PD, PH, PA, PI, PB, PF, PC, A0, I5, A1, B1, I4, F4, H5, G5, D0, G0, C1, C4, nl2, nl1, nl2+1, nl2+3, nl2+2, nl1+1, nl, 0, nl+1, nl1+2, nl1+3, nl+3, nl+2, 1, 2, 3);
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}
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sa0 += 1;
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sa1 += 1;
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sa2 += 1;
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sa3 += 1;
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sa4 += 1;
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E += n;
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}
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}
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}
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#define XBR_FUNC(size) \
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static int xbr##size##x(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
|
|
{ \
|
|
xbr_filter(arg, jobnr, nb_jobs, size); \
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|
return 0; \
|
|
}
|
|
|
|
XBR_FUNC(2)
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|
XBR_FUNC(3)
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|
XBR_FUNC(4)
|
|
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
XBRContext *s = ctx->priv;
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
|
|
outlink->w = inlink->w * s->n;
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|
outlink->h = inlink->h * s->n;
|
|
return 0;
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
static const enum AVPixelFormat pix_fmts[] = {
|
|
AV_PIX_FMT_0RGB32, AV_PIX_FMT_NONE,
|
|
};
|
|
|
|
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
|
|
if (!fmts_list)
|
|
return AVERROR(ENOMEM);
|
|
return ff_set_common_formats(ctx, fmts_list);
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
XBRContext *s = ctx->priv;
|
|
ThreadData td;
|
|
|
|
AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out) {
|
|
av_frame_free(&in);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
av_frame_copy_props(out, in);
|
|
|
|
td.in = in;
|
|
td.out = out;
|
|
td.rgbtoyuv = s->rgbtoyuv;
|
|
ctx->internal->execute(ctx, s->func, &td, NULL, FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
|
|
|
|
out->width = outlink->w;
|
|
out->height = outlink->h;
|
|
|
|
av_frame_free(&in);
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static int init(AVFilterContext *ctx)
|
|
{
|
|
XBRContext *s = ctx->priv;
|
|
static const xbrfunc_t xbrfuncs[] = {xbr2x, xbr3x, xbr4x};
|
|
|
|
uint32_t c;
|
|
int bg, rg, g;
|
|
|
|
for (bg = -255; bg < 256; bg++) {
|
|
for (rg = -255; rg < 256; rg++) {
|
|
const uint32_t u = (uint32_t)((-169*rg + 500*bg)/1000) + 128;
|
|
const uint32_t v = (uint32_t)(( 500*rg - 81*bg)/1000) + 128;
|
|
int startg = FFMAX3(-bg, -rg, 0);
|
|
int endg = FFMIN3(255-bg, 255-rg, 255);
|
|
uint32_t y = (uint32_t)(( 299*rg + 1000*startg + 114*bg)/1000);
|
|
c = bg + (rg<<16) + 0x010101 * startg;
|
|
for (g = startg; g <= endg; g++) {
|
|
s->rgbtoyuv[c] = ((y++) << 16) + (u << 8) + v;
|
|
c+= 0x010101;
|
|
}
|
|
}
|
|
}
|
|
|
|
s->func = xbrfuncs[s->n - 2];
|
|
return 0;
|
|
}
|
|
|
|
static const AVFilterPad xbr_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad xbr_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_vf_xbr = {
|
|
.name = "xbr",
|
|
.description = NULL_IF_CONFIG_SMALL("Scale the input using xBR algorithm."),
|
|
.inputs = xbr_inputs,
|
|
.outputs = xbr_outputs,
|
|
.query_formats = query_formats,
|
|
.priv_size = sizeof(XBRContext),
|
|
.priv_class = &xbr_class,
|
|
.init = init,
|
|
.flags = AVFILTER_FLAG_SLICE_THREADS,
|
|
};
|