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lavfi: port 2xsai filter from libmpcodecs
Partially based on the port by Niel van der Westhuizen <nielkie@gmail.com>, done for GCI 2010. Same output as the original filter and as fast. See thread: Subject: [FFmpeg-devel] [PATCH] Port MPlayer 2xSaI filter to libavfilter Date: Thu, 25 Nov 2010 01:31:24 +1000
This commit is contained in:
Stefano Sabatini
@@ -25,6 +25,7 @@ version next:
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- drop support for ffmpeg without libavfilter
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- drawtext video filter: fontconfig support
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- ffmpeg -benchmark_all option
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- super2xsai filter ported from libmpcodecs
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version 0.10:
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1
configure
vendored
1
configure
vendored
@@ -1692,6 +1692,7 @@ ocv_filter_deps="libopencv"
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pan_filter_deps="swresample"
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removelogo_filter_deps="avcodec avformat swscale"
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scale_filter_deps="swscale"
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super2xsai_filter_deps="gpl"
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tinterlace_filter_deps="gpl"
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yadif_filter_deps="gpl"
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@@ -2716,6 +2716,13 @@ For example:
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will create two separate outputs from the same input, one cropped and
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one padded.
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@section super2xsai
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Scale the input by 2x and smooth using the Super2xSaI (Scale and
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Interpolate) pixel art scaling algorithm.
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Useful for enlarging pixel art images without reducing sharpness.
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@section swapuv
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Swap U & V plane.
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@@ -94,6 +94,7 @@ OBJS-$(CONFIG_SETTB_FILTER) += vf_settb.o
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OBJS-$(CONFIG_SHOWINFO_FILTER) += vf_showinfo.o
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OBJS-$(CONFIG_SLICIFY_FILTER) += vf_slicify.o
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OBJS-$(CONFIG_SPLIT_FILTER) += vf_split.o
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OBJS-$(CONFIG_SUPER2XSAI_FILTER) += vf_super2xsai.o
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OBJS-$(CONFIG_SWAPUV_FILTER) += vf_swapuv.o
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OBJS-$(CONFIG_THUMBNAIL_FILTER) += vf_thumbnail.o
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OBJS-$(CONFIG_TILE_FILTER) += vf_tile.o
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@@ -99,6 +99,7 @@ void avfilter_register_all(void)
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REGISTER_FILTER (SHOWINFO, showinfo, vf);
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REGISTER_FILTER (SLICIFY, slicify, vf);
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REGISTER_FILTER (SPLIT, split, vf);
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REGISTER_FILTER (SUPER2XSAI, super2xsai, vf);
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REGISTER_FILTER (SWAPUV, swapuv, vf);
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REGISTER_FILTER (THUMBNAIL, thumbnail, vf);
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REGISTER_FILTER (TILE, tile, vf);
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@@ -29,7 +29,7 @@
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#include "libavutil/avutil.h"
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#define LIBAVFILTER_VERSION_MAJOR 2
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#define LIBAVFILTER_VERSION_MINOR 68
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#define LIBAVFILTER_VERSION_MINOR 69
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#define LIBAVFILTER_VERSION_MICRO 100
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#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
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350
libavfilter/vf_super2xsai.c
Normal file
350
libavfilter/vf_super2xsai.c
Normal file
@@ -0,0 +1,350 @@
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/*
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* Copyright (c) 2010 Niel van der Westhuizen <nielkie@gmail.com>
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* Copyright (c) 2002 A'rpi
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* Copyright (c) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 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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* Super 2xSaI video filter
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* Ported from MPlayer libmpcodecs/vf_2xsai.c.
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*/
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#include "libavutil/pixdesc.h"
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#include "libavutil/intreadwrite.h"
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#include "avfilter.h"
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typedef struct {
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/* masks used for two pixels interpolation */
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uint32_t hi_pixel_mask;
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uint32_t lo_pixel_mask;
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/* masks used for four pixels interpolation */
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uint32_t q_hi_pixel_mask;
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uint32_t q_lo_pixel_mask;
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int bpp; ///< bytes per pixel, pixel stride for each (packed) pixel
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} Super2xSaIContext;
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#define GET_RESULT(A, B, C, D) ((A != C || A != D) - (B != C || B != D))
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#define INTERPOLATE(A, B) (((A & hi_pixel_mask) >> 1) + ((B & hi_pixel_mask) >> 1) + (A & B & lo_pixel_mask))
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#define Q_INTERPOLATE(A, B, C, D) ((A & q_hi_pixel_mask) >> 2) + ((B & q_hi_pixel_mask) >> 2) + ((C & q_hi_pixel_mask) >> 2) + ((D & q_hi_pixel_mask) >> 2) \
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+ ((((A & q_lo_pixel_mask) + (B & q_lo_pixel_mask) + (C & q_lo_pixel_mask) + (D & q_lo_pixel_mask)) >> 2) & q_lo_pixel_mask)
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static void super2xsai(AVFilterContext *ctx,
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uint8_t *src, int src_linesize,
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uint8_t *dst, int dst_linesize,
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int width, int height)
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{
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Super2xSaIContext *sai = ctx->priv;
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unsigned int x, y;
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uint32_t color[4][4];
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unsigned char *src_line[4];
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const int bpp = sai->bpp;
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const uint32_t hi_pixel_mask = sai->hi_pixel_mask;
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const uint32_t lo_pixel_mask = sai->lo_pixel_mask;
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const uint32_t q_hi_pixel_mask = sai->q_hi_pixel_mask;
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const uint32_t q_lo_pixel_mask = sai->q_lo_pixel_mask;
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/* Point to the first 4 lines, first line is duplicated */
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src_line[0] = src;
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src_line[1] = src;
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src_line[2] = src + src_linesize*FFMIN(1, height-1);
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src_line[3] = src + src_linesize*FFMIN(2, height-1);
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#define READ_COLOR4(dst, src_line, off) dst = *((const uint32_t *)src_line + off)
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#define READ_COLOR3(dst, src_line, off) dst = AV_RL24 (src_line + 3*off)
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#define READ_COLOR2(dst, src_line, off) dst = *((const uint16_t *)src_line + off)
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/* Initialise the color matrix for this row. */
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switch (bpp) {
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case 4:
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READ_COLOR4(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR4(color[0][2], src_line[0], 1); READ_COLOR4(color[0][3], src_line[0], 2);
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READ_COLOR4(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR4(color[1][2], src_line[1], 1); READ_COLOR4(color[1][3], src_line[1], 2);
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READ_COLOR4(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR4(color[2][2], src_line[2], 1); READ_COLOR4(color[2][3], src_line[2], 2);
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READ_COLOR4(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR4(color[3][2], src_line[3], 1); READ_COLOR4(color[3][3], src_line[3], 2);
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break;
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case 3:
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READ_COLOR3(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR3(color[0][2], src_line[0], 1); READ_COLOR3(color[0][3], src_line[0], 2);
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READ_COLOR3(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR3(color[1][2], src_line[1], 1); READ_COLOR3(color[1][3], src_line[1], 2);
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READ_COLOR3(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR3(color[2][2], src_line[2], 1); READ_COLOR3(color[2][3], src_line[2], 2);
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READ_COLOR3(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR3(color[3][2], src_line[3], 1); READ_COLOR3(color[3][3], src_line[3], 2);
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break;
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default:
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READ_COLOR2(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR2(color[0][2], src_line[0], 1); READ_COLOR2(color[0][3], src_line[0], 2);
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READ_COLOR2(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR2(color[1][2], src_line[1], 1); READ_COLOR2(color[1][3], src_line[1], 2);
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READ_COLOR2(color[2][0], src_line[2], 0); color[2][1] = color[2][0]; READ_COLOR2(color[2][2], src_line[2], 1); READ_COLOR2(color[2][3], src_line[2], 2);
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READ_COLOR2(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR2(color[3][2], src_line[3], 1); READ_COLOR2(color[3][3], src_line[3], 2);
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}
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for (y = 0; y < height; y++) {
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uint8_t *dst_line[2];
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dst_line[0] = dst + dst_linesize*2*y;
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dst_line[1] = dst + dst_linesize*(2*y+1);
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for (x = 0; x < width; x++) {
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uint32_t product1a, product1b, product2a, product2b;
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//--------------------------------------- B0 B1 B2 B3 0 1 2 3
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// 4 5* 6 S2 -> 4 5* 6 7
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// 1 2 3 S1 8 9 10 11
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// A0 A1 A2 A3 12 13 14 15
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//--------------------------------------
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if (color[2][1] == color[1][2] && color[1][1] != color[2][2]) {
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product2b = color[2][1];
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product1b = product2b;
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} else if (color[1][1] == color[2][2] && color[2][1] != color[1][2]) {
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product2b = color[1][1];
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product1b = product2b;
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} else if (color[1][1] == color[2][2] && color[2][1] == color[1][2]) {
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int r = 0;
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r += GET_RESULT(color[1][2], color[1][1], color[1][0], color[3][1]);
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r += GET_RESULT(color[1][2], color[1][1], color[2][0], color[0][1]);
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r += GET_RESULT(color[1][2], color[1][1], color[3][2], color[2][3]);
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r += GET_RESULT(color[1][2], color[1][1], color[0][2], color[1][3]);
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if (r > 0)
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product1b = color[1][2];
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else if (r < 0)
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product1b = color[1][1];
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else
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product1b = INTERPOLATE(color[1][1], color[1][2]);
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product2b = product1b;
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} else {
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if (color[1][2] == color[2][2] && color[2][2] == color[3][1] && color[2][1] != color[3][2] && color[2][2] != color[3][0])
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product2b = Q_INTERPOLATE(color[2][2], color[2][2], color[2][2], color[2][1]);
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else if (color[1][1] == color[2][1] && color[2][1] == color[3][2] && color[3][1] != color[2][2] && color[2][1] != color[3][3])
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product2b = Q_INTERPOLATE(color[2][1], color[2][1], color[2][1], color[2][2]);
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else
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product2b = INTERPOLATE(color[2][1], color[2][2]);
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if (color[1][2] == color[2][2] && color[1][2] == color[0][1] && color[1][1] != color[0][2] && color[1][2] != color[0][0])
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product1b = Q_INTERPOLATE(color[1][2], color[1][2], color[1][2], color[1][1]);
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else if (color[1][1] == color[2][1] && color[1][1] == color[0][2] && color[0][1] != color[1][2] && color[1][1] != color[0][3])
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product1b = Q_INTERPOLATE(color[1][2], color[1][1], color[1][1], color[1][1]);
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else
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product1b = INTERPOLATE(color[1][1], color[1][2]);
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}
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if (color[1][1] == color[2][2] && color[2][1] != color[1][2] && color[1][0] == color[1][1] && color[1][1] != color[3][2])
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product2a = INTERPOLATE(color[2][1], color[1][1]);
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else if (color[1][1] == color[2][0] && color[1][2] == color[1][1] && color[1][0] != color[2][1] && color[1][1] != color[3][0])
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product2a = INTERPOLATE(color[2][1], color[1][1]);
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else
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product2a = color[2][1];
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if (color[2][1] == color[1][2] && color[1][1] != color[2][2] && color[2][0] == color[2][1] && color[2][1] != color[0][2])
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product1a = INTERPOLATE(color[2][1], color[1][1]);
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else if (color[1][0] == color[2][1] && color[2][2] == color[2][1] && color[2][0] != color[1][1] && color[2][1] != color[0][0])
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product1a = INTERPOLATE(color[2][1], color[1][1]);
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else
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product1a = color[1][1];
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/* Set the calculated pixels */
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switch (bpp) {
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case 4:
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AV_WN32A(dst_line[0] + x * 8, product1a);
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AV_WN32A(dst_line[0] + x * 8 + 4, product1b);
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AV_WN32A(dst_line[1] + x * 8, product2a);
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AV_WN32A(dst_line[1] + x * 8 + 4, product2b);
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break;
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case 3:
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AV_WL24(dst_line[0] + x * 6, product1a);
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AV_WL24(dst_line[0] + x * 6 + 3, product1b);
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AV_WL24(dst_line[1] + x * 6, product2a);
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AV_WL24(dst_line[1] + x * 6 + 3, product2b);
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break;
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default: // bpp = 2
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AV_WN32A(dst_line[0] + x * 4, product1a | (product1b << 16));
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AV_WN32A(dst_line[1] + x * 4, product2a | (product2b << 16));
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}
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/* Move color matrix forward */
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color[0][0] = color[0][1]; color[0][1] = color[0][2]; color[0][2] = color[0][3];
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color[1][0] = color[1][1]; color[1][1] = color[1][2]; color[1][2] = color[1][3];
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color[2][0] = color[2][1]; color[2][1] = color[2][2]; color[2][2] = color[2][3];
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color[3][0] = color[3][1]; color[3][1] = color[3][2]; color[3][2] = color[3][3];
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if (x < width - 3) {
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x += 3;
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switch (bpp) {
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case 4:
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READ_COLOR4(color[0][3], src_line[0], x);
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READ_COLOR4(color[1][3], src_line[1], x);
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READ_COLOR4(color[2][3], src_line[2], x);
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READ_COLOR4(color[3][3], src_line[3], x);
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break;
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case 3:
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READ_COLOR3(color[0][3], src_line[0], x);
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READ_COLOR3(color[1][3], src_line[1], x);
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READ_COLOR3(color[2][3], src_line[2], x);
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READ_COLOR3(color[3][3], src_line[3], x);
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break;
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default: /* case 2 */
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READ_COLOR2(color[0][3], src_line[0], x);
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READ_COLOR2(color[1][3], src_line[1], x);
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READ_COLOR2(color[2][3], src_line[2], x);
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READ_COLOR2(color[3][3], src_line[3], x);
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}
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x -= 3;
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}
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}
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/* We're done with one line, so we shift the source lines up */
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src_line[0] = src_line[1];
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src_line[1] = src_line[2];
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src_line[2] = src_line[3];
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/* Read next line */
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src_line[3] = src_line[2];
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if (y < height - 3)
|
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src_line[3] += src_linesize;
|
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|
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switch (bpp) {
|
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case 4:
|
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READ_COLOR4(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR4(color[0][2], src_line[0], 1); READ_COLOR4(color[0][3], src_line[0], 2);
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READ_COLOR4(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR4(color[1][2], src_line[1], 1); READ_COLOR4(color[1][3], src_line[1], 2);
|
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READ_COLOR4(color[2][0], src_line[2], 0); color[2][1] = color[2][1]; READ_COLOR4(color[2][2], src_line[2], 1); READ_COLOR4(color[2][3], src_line[2], 2);
|
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READ_COLOR4(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR4(color[3][2], src_line[3], 1); READ_COLOR4(color[3][3], src_line[3], 2);
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break;
|
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case 3:
|
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READ_COLOR3(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR3(color[0][2], src_line[0], 1); READ_COLOR3(color[0][3], src_line[0], 2);
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READ_COLOR3(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR3(color[1][2], src_line[1], 1); READ_COLOR3(color[1][3], src_line[1], 2);
|
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READ_COLOR3(color[2][0], src_line[2], 0); color[2][1] = color[2][1]; READ_COLOR3(color[2][2], src_line[2], 1); READ_COLOR3(color[2][3], src_line[2], 2);
|
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READ_COLOR3(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR3(color[3][2], src_line[3], 1); READ_COLOR3(color[3][3], src_line[3], 2);
|
||||
break;
|
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default:
|
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READ_COLOR2(color[0][0], src_line[0], 0); color[0][1] = color[0][0]; READ_COLOR2(color[0][2], src_line[0], 1); READ_COLOR2(color[0][3], src_line[0], 2);
|
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READ_COLOR2(color[1][0], src_line[1], 0); color[1][1] = color[1][0]; READ_COLOR2(color[1][2], src_line[1], 1); READ_COLOR2(color[1][3], src_line[1], 2);
|
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READ_COLOR2(color[2][0], src_line[2], 0); color[2][1] = color[2][1]; READ_COLOR2(color[2][2], src_line[2], 1); READ_COLOR2(color[2][3], src_line[2], 2);
|
||||
READ_COLOR2(color[3][0], src_line[3], 0); color[3][1] = color[3][0]; READ_COLOR2(color[3][2], src_line[3], 1); READ_COLOR2(color[3][3], src_line[3], 2);
|
||||
}
|
||||
} // y loop
|
||||
}
|
||||
|
||||
static int query_formats(AVFilterContext *ctx)
|
||||
{
|
||||
static const enum PixelFormat pix_fmts[] = {
|
||||
PIX_FMT_RGBA, PIX_FMT_BGRA, PIX_FMT_ARGB, PIX_FMT_ABGR,
|
||||
PIX_FMT_RGB24, PIX_FMT_BGR24,
|
||||
PIX_FMT_RGB565, PIX_FMT_BGR565, PIX_FMT_RGB555, PIX_FMT_BGR555,
|
||||
PIX_FMT_NONE
|
||||
};
|
||||
|
||||
avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int config_input(AVFilterLink *inlink)
|
||||
{
|
||||
Super2xSaIContext *sai = inlink->dst->priv;
|
||||
|
||||
sai->hi_pixel_mask = 0xFEFEFEFE;
|
||||
sai->lo_pixel_mask = 0x01010101;
|
||||
sai->q_hi_pixel_mask = 0xFCFCFCFC;
|
||||
sai->q_lo_pixel_mask = 0x03030303;
|
||||
sai->bpp = 4;
|
||||
|
||||
switch (inlink->format) {
|
||||
case PIX_FMT_RGB24:
|
||||
case PIX_FMT_BGR24:
|
||||
sai->bpp = 3;
|
||||
break;
|
||||
|
||||
case PIX_FMT_RGB565:
|
||||
case PIX_FMT_BGR565:
|
||||
sai->hi_pixel_mask = 0xF7DEF7DE;
|
||||
sai->lo_pixel_mask = 0x08210821;
|
||||
sai->q_hi_pixel_mask = 0xE79CE79C;
|
||||
sai->q_lo_pixel_mask = 0x18631863;
|
||||
sai->bpp = 2;
|
||||
break;
|
||||
|
||||
case PIX_FMT_BGR555:
|
||||
case PIX_FMT_RGB555:
|
||||
sai->hi_pixel_mask = 0x7BDE7BDE;
|
||||
sai->lo_pixel_mask = 0x04210421;
|
||||
sai->q_hi_pixel_mask = 0x739C739C;
|
||||
sai->q_lo_pixel_mask = 0x0C630C63;
|
||||
sai->bpp = 2;
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int config_output(AVFilterLink *outlink)
|
||||
{
|
||||
AVFilterLink *inlink = outlink->src->inputs[0];
|
||||
|
||||
outlink->w = inlink->w*2;
|
||||
outlink->h = inlink->h*2;
|
||||
|
||||
av_log(inlink->dst, AV_LOG_INFO, "fmt:%s size:%dx%d -> size:%dx%d\n",
|
||||
av_get_pix_fmt_name(inlink->format),
|
||||
inlink->w, inlink->h, outlink->w, outlink->h);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void null_draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) { }
|
||||
|
||||
static void end_frame(AVFilterLink *inlink)
|
||||
{
|
||||
AVFilterLink *outlink = inlink->dst->outputs[0];
|
||||
AVFilterBufferRef *inpicref = inlink->cur_buf;
|
||||
AVFilterBufferRef *outpicref = outlink->out_buf;
|
||||
|
||||
super2xsai(inlink->dst, inpicref->data[0], inpicref->linesize[0],
|
||||
outpicref->data[0], outpicref->linesize[0],
|
||||
inlink->w, inlink->h);
|
||||
|
||||
avfilter_unref_buffer(inpicref);
|
||||
avfilter_draw_slice(outlink, 0, outlink->h, 1);
|
||||
avfilter_end_frame(outlink);
|
||||
avfilter_unref_buffer(outpicref);
|
||||
}
|
||||
|
||||
AVFilter avfilter_vf_super2xsai = {
|
||||
.name = "super2xsai",
|
||||
.description = NULL_IF_CONFIG_SMALL("Scale the input by 2x using the Super2xSaI pixel art algorithm."),
|
||||
.priv_size = sizeof(Super2xSaIContext),
|
||||
.query_formats = query_formats,
|
||||
|
||||
.inputs = (const AVFilterPad[]) {
|
||||
{ .name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.config_props = config_input,
|
||||
.draw_slice = null_draw_slice,
|
||||
.end_frame = end_frame,
|
||||
.min_perms = AV_PERM_READ },
|
||||
{ .name = NULL }
|
||||
},
|
||||
.outputs = (const AVFilterPad[]) {
|
||||
{ .name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.config_props = config_output },
|
||||
{ .name = NULL }
|
||||
},
|
||||
};
|
||||
Reference in New Issue
Block a user