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/* |
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* BobWeaver Deinterlacing Filter |
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* Copyright (C) 2016 Thomas Mundt <loudmax@yahoo.de> |
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* |
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* Based on YADIF (Yet Another Deinterlacing Filter) |
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* Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at> |
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* 2010 James Darnley <james.darnley@gmail.com> |
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* |
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* With use of Weston 3 Field Deinterlacing Filter algorithm |
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* Copyright (C) 2012 British Broadcasting Corporation, All Rights Reserved |
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* Author of de-interlace algorithm: Jim Easterbrook for BBC R&D |
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* Based on the process described by Martin Weston for BBC R&D |
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* |
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* This file is part of FFmpeg. |
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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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#include "libavutil/avassert.h" |
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#include "libavutil/common.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/imgutils.h" |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "internal.h" |
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#include "video.h" |
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#include "bwdif.h" |
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/* |
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* Filter coefficients coef_lf and coef_hf taken from BBC PH-2071 (Weston 3 Field Deinterlacer). |
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* Used when there is spatial and temporal interpolation. |
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* Filter coefficients coef_sp are used when there is spatial interpolation only. |
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* Adjusted for matching visual sharpness impression of spatial and temporal interpolation. |
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*/ |
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static const uint16_t coef_lf[2] = { 4309, 213 }; |
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static const uint16_t coef_hf[3] = { 5570, 3801, 1016 }; |
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static const uint16_t coef_sp[2] = { 5077, 981 }; |
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typedef struct ThreadData { |
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AVFrame *frame; |
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int plane; |
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int w, h; |
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int parity; |
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int tff; |
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} ThreadData; |
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#define FILTER_INTRA() \ |
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for (x = 0; x < w; x++) { \ |
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interpol = (coef_sp[0] * (cur[mrefs] + cur[prefs]) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \ |
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dst[0] = av_clip(interpol, 0, clip_max); \ |
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\ |
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dst++; \ |
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cur++; \ |
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} |
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#define FILTER1() \ |
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for (x = 0; x < w; x++) { \ |
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int c = cur[mrefs]; \ |
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int d = (prev2[0] + next2[0]) >> 1; \ |
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int e = cur[prefs]; \ |
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int temporal_diff0 = FFABS(prev2[0] - next2[0]); \ |
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int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e)) >> 1; \ |
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int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e)) >> 1; \ |
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int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \ |
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\ |
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if (!diff) { \ |
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dst[0] = d; \ |
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} else { |
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#define SPAT_CHECK() \ |
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int b = ((prev2[mrefs2] + next2[mrefs2]) >> 1) - c; \ |
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int f = ((prev2[prefs2] + next2[prefs2]) >> 1) - e; \ |
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int dc = d - c; \ |
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int de = d - e; \ |
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int max = FFMAX3(de, dc, FFMIN(b, f)); \ |
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int min = FFMIN3(de, dc, FFMAX(b, f)); \ |
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diff = FFMAX3(diff, min, -max); |
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#define FILTER_LINE() \ |
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SPAT_CHECK() \ |
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if (FFABS(c - e) > temporal_diff0) { \ |
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interpol = (((coef_hf[0] * (prev2[0] + next2[0]) \ |
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- coef_hf[1] * (prev2[mrefs2] + next2[mrefs2] + prev2[prefs2] + next2[prefs2]) \ |
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+ coef_hf[2] * (prev2[mrefs4] + next2[mrefs4] + prev2[prefs4] + next2[prefs4])) >> 2) \ |
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+ coef_lf[0] * (c + e) - coef_lf[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \ |
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} else { \ |
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interpol = (coef_sp[0] * (c + e) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \ |
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} |
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#define FILTER_EDGE() \ |
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if (spat) { \ |
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SPAT_CHECK() \ |
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} \ |
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interpol = (c + e) >> 1; |
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#define FILTER2() \ |
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if (interpol > d + diff) \ |
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interpol = d + diff; \ |
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else if (interpol < d - diff) \ |
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interpol = d - diff; \ |
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\ |
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dst[0] = av_clip(interpol, 0, clip_max); \ |
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} \ |
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\ |
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dst++; \ |
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cur++; \ |
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prev++; \ |
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next++; \ |
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prev2++; \ |
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next2++; \ |
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} |
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static void filter_intra(void *dst1, void *cur1, int w, int prefs, int mrefs, |
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int prefs3, int mrefs3, int parity, int clip_max) |
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{ |
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uint8_t *dst = dst1; |
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uint8_t *cur = cur1; |
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int interpol, x; |
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FILTER_INTRA() |
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} |
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static void filter_line_c(void *dst1, void *prev1, void *cur1, void *next1, |
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int w, int prefs, int mrefs, int prefs2, int mrefs2, |
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int prefs3, int mrefs3, int prefs4, int mrefs4, |
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int parity, int clip_max) |
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{ |
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uint8_t *dst = dst1; |
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uint8_t *prev = prev1; |
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uint8_t *cur = cur1; |
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uint8_t *next = next1; |
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uint8_t *prev2 = parity ? prev : cur ; |
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uint8_t *next2 = parity ? cur : next; |
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int interpol, x; |
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FILTER1() |
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FILTER_LINE() |
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FILTER2() |
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} |
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static void filter_edge(void *dst1, void *prev1, void *cur1, void *next1, |
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int w, int prefs, int mrefs, int prefs2, int mrefs2, |
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int parity, int clip_max, int spat) |
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{ |
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uint8_t *dst = dst1; |
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uint8_t *prev = prev1; |
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uint8_t *cur = cur1; |
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uint8_t *next = next1; |
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uint8_t *prev2 = parity ? prev : cur ; |
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uint8_t *next2 = parity ? cur : next; |
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int interpol, x; |
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FILTER1() |
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FILTER_EDGE() |
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FILTER2() |
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} |
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static void filter_intra_16bit(void *dst1, void *cur1, int w, int prefs, int mrefs, |
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int prefs3, int mrefs3, int parity, int clip_max) |
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{ |
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uint16_t *dst = dst1; |
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uint16_t *cur = cur1; |
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int interpol, x; |
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FILTER_INTRA() |
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} |
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static void filter_line_c_16bit(void *dst1, void *prev1, void *cur1, void *next1, |
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int w, int prefs, int mrefs, int prefs2, int mrefs2, |
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int prefs3, int mrefs3, int prefs4, int mrefs4, |
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int parity, int clip_max) |
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{ |
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uint16_t *dst = dst1; |
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uint16_t *prev = prev1; |
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uint16_t *cur = cur1; |
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uint16_t *next = next1; |
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uint16_t *prev2 = parity ? prev : cur ; |
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uint16_t *next2 = parity ? cur : next; |
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int interpol, x; |
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FILTER1() |
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FILTER_LINE() |
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FILTER2() |
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} |
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static void filter_edge_16bit(void *dst1, void *prev1, void *cur1, void *next1, |
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int w, int prefs, int mrefs, int prefs2, int mrefs2, |
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int parity, int clip_max, int spat) |
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{ |
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uint16_t *dst = dst1; |
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uint16_t *prev = prev1; |
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uint16_t *cur = cur1; |
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uint16_t *next = next1; |
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uint16_t *prev2 = parity ? prev : cur ; |
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uint16_t *next2 = parity ? cur : next; |
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int interpol, x; |
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FILTER1() |
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FILTER_EDGE() |
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FILTER2() |
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} |
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static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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BWDIFContext *s = ctx->priv; |
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YADIFContext *yadif = &s->yadif; |
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ThreadData *td = arg; |
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int linesize = yadif->cur->linesize[td->plane]; |
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int clip_max = (1 << (yadif->csp->comp[td->plane].depth)) - 1; |
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int df = (yadif->csp->comp[td->plane].depth + 7) / 8; |
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int refs = linesize / df; |
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int slice_start = (td->h * jobnr ) / nb_jobs; |
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int slice_end = (td->h * (jobnr+1)) / nb_jobs; |
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int y; |
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for (y = slice_start; y < slice_end; y++) { |
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if ((y ^ td->parity) & 1) { |
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uint8_t *prev = &yadif->prev->data[td->plane][y * linesize]; |
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uint8_t *cur = &yadif->cur ->data[td->plane][y * linesize]; |
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uint8_t *next = &yadif->next->data[td->plane][y * linesize]; |
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uint8_t *dst = &td->frame->data[td->plane][y * td->frame->linesize[td->plane]]; |
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if (yadif->current_field == YADIF_FIELD_END) { |
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s->filter_intra(dst, cur, td->w, (y + df) < td->h ? refs : -refs, |
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y > (df - 1) ? -refs : refs, |
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(y + 3*df) < td->h ? 3 * refs : -refs, |
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y > (3*df - 1) ? -3 * refs : refs, |
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td->parity ^ td->tff, clip_max); |
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} else if ((y < 4) || ((y + 5) > td->h)) { |
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s->filter_edge(dst, prev, cur, next, td->w, |
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(y + df) < td->h ? refs : -refs, |
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y > (df - 1) ? -refs : refs, |
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refs << 1, -(refs << 1), |
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td->parity ^ td->tff, clip_max, |
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(y < 2) || ((y + 3) > td->h) ? 0 : 1); |
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} else { |
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s->filter_line(dst, prev, cur, next, td->w, |
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refs, -refs, refs << 1, -(refs << 1), |
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3 * refs, -3 * refs, refs << 2, -(refs << 2), |
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td->parity ^ td->tff, clip_max); |
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} |
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} else { |
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memcpy(&td->frame->data[td->plane][y * td->frame->linesize[td->plane]], |
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&yadif->cur->data[td->plane][y * linesize], td->w * df); |
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} |
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} |
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return 0; |
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} |
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static void filter(AVFilterContext *ctx, AVFrame *dstpic, |
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int parity, int tff) |
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{ |
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BWDIFContext *bwdif = ctx->priv; |
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YADIFContext *yadif = &bwdif->yadif; |
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ThreadData td = { .frame = dstpic, .parity = parity, .tff = tff }; |
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int i; |
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for (i = 0; i < yadif->csp->nb_components; i++) { |
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int w = dstpic->width; |
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int h = dstpic->height; |
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if (i == 1 || i == 2) { |
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w = AV_CEIL_RSHIFT(w, yadif->csp->log2_chroma_w); |
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h = AV_CEIL_RSHIFT(h, yadif->csp->log2_chroma_h); |
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} |
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td.w = w; |
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td.h = h; |
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td.plane = i; |
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ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(h, ff_filter_get_nb_threads(ctx))); |
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} |
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if (yadif->current_field == YADIF_FIELD_END) { |
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yadif->current_field = YADIF_FIELD_NORMAL; |
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} |
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emms_c(); |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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BWDIFContext *bwdif = ctx->priv; |
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YADIFContext *yadif = &bwdif->yadif; |
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av_frame_free(&yadif->prev); |
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av_frame_free(&yadif->cur ); |
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av_frame_free(&yadif->next); |
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} |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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static const enum AVPixelFormat pix_fmts[] = { |
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV420P, |
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AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, |
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, |
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, |
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, |
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, |
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AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, |
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, |
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, |
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AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, |
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, |
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, |
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, |
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP16, |
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16, |
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AV_PIX_FMT_NONE |
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}; |
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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
326 |
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if (!fmts_list) |
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return AVERROR(ENOMEM); |
328 |
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329 |
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return ff_set_common_formats(ctx, fmts_list); |
330 |
|
|
} |
331 |
|
|
|
332 |
|
|
static int config_props(AVFilterLink *link) |
333 |
|
|
{ |
334 |
|
|
AVFilterContext *ctx = link->src; |
335 |
|
|
BWDIFContext *s = link->src->priv; |
336 |
|
|
YADIFContext *yadif = &s->yadif; |
337 |
|
|
|
338 |
|
|
link->time_base.num = link->src->inputs[0]->time_base.num; |
339 |
|
|
link->time_base.den = link->src->inputs[0]->time_base.den * 2; |
340 |
|
|
link->w = link->src->inputs[0]->w; |
341 |
|
|
link->h = link->src->inputs[0]->h; |
342 |
|
|
|
343 |
|
|
if(yadif->mode&1) |
344 |
|
|
link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1}); |
345 |
|
|
|
346 |
|
|
if (link->w < 3 || link->h < 4) { |
347 |
|
|
av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or 4 lines is not supported\n"); |
348 |
|
|
return AVERROR(EINVAL); |
349 |
|
|
} |
350 |
|
|
|
351 |
|
|
yadif->csp = av_pix_fmt_desc_get(link->format); |
352 |
|
|
yadif->filter = filter; |
353 |
|
|
if (yadif->csp->comp[0].depth > 8) { |
354 |
|
|
s->filter_intra = filter_intra_16bit; |
355 |
|
|
s->filter_line = filter_line_c_16bit; |
356 |
|
|
s->filter_edge = filter_edge_16bit; |
357 |
|
|
} else { |
358 |
|
|
s->filter_intra = filter_intra; |
359 |
|
|
s->filter_line = filter_line_c; |
360 |
|
|
s->filter_edge = filter_edge; |
361 |
|
|
} |
362 |
|
|
|
363 |
|
|
if (ARCH_X86) |
364 |
|
|
ff_bwdif_init_x86(s); |
365 |
|
|
|
366 |
|
|
return 0; |
367 |
|
|
} |
368 |
|
|
|
369 |
|
|
|
370 |
|
|
#define OFFSET(x) offsetof(YADIFContext, x) |
371 |
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
372 |
|
|
|
373 |
|
|
#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit } |
374 |
|
|
|
375 |
|
|
static const AVOption bwdif_options[] = { |
376 |
|
|
{ "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FIELD}, 0, 1, FLAGS, "mode"}, |
377 |
|
|
CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"), |
378 |
|
|
CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"), |
379 |
|
|
|
380 |
|
|
{ "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" }, |
381 |
|
|
CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"), |
382 |
|
|
CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"), |
383 |
|
|
CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"), |
384 |
|
|
|
385 |
|
|
{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" }, |
386 |
|
|
CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"), |
387 |
|
|
CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"), |
388 |
|
|
|
389 |
|
|
{ NULL } |
390 |
|
|
}; |
391 |
|
|
|
392 |
|
|
AVFILTER_DEFINE_CLASS(bwdif); |
393 |
|
|
|
394 |
|
|
static const AVFilterPad avfilter_vf_bwdif_inputs[] = { |
395 |
|
|
{ |
396 |
|
|
.name = "default", |
397 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
398 |
|
|
.filter_frame = ff_yadif_filter_frame, |
399 |
|
|
}, |
400 |
|
|
{ NULL } |
401 |
|
|
}; |
402 |
|
|
|
403 |
|
|
static const AVFilterPad avfilter_vf_bwdif_outputs[] = { |
404 |
|
|
{ |
405 |
|
|
.name = "default", |
406 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
407 |
|
|
.request_frame = ff_yadif_request_frame, |
408 |
|
|
.config_props = config_props, |
409 |
|
|
}, |
410 |
|
|
{ NULL } |
411 |
|
|
}; |
412 |
|
|
|
413 |
|
|
AVFilter ff_vf_bwdif = { |
414 |
|
|
.name = "bwdif", |
415 |
|
|
.description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."), |
416 |
|
|
.priv_size = sizeof(BWDIFContext), |
417 |
|
|
.priv_class = &bwdif_class, |
418 |
|
|
.uninit = uninit, |
419 |
|
|
.query_formats = query_formats, |
420 |
|
|
.inputs = avfilter_vf_bwdif_inputs, |
421 |
|
|
.outputs = avfilter_vf_bwdif_outputs, |
422 |
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS, |
423 |
|
|
}; |