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360 lines
15 KiB
360 lines
15 KiB
/* |
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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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#include "filters.h" |
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#include "video.h" |
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typedef struct Super2xSaIContext { |
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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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int is_be; |
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} Super2xSaIContext; |
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typedef struct ThreadData { |
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AVFrame *in, *out; |
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} ThreadData; |
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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 int super2xsai(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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Super2xSaIContext *s = ctx->priv; |
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ThreadData *td = arg; |
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AVFrame *in = td->in; |
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AVFrame *out = td->out; |
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const uint8_t *src = in->data[0]; |
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uint8_t *dst = out->data[0]; |
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const int src_linesize = in->linesize[0]; |
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const int dst_linesize = out->linesize[0]; |
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const int width = in->width; |
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const int height = in->height; |
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unsigned int x, y; |
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uint32_t color[4][4]; |
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const uint8_t *src_line[4]; |
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const int bpp = s->bpp; |
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const uint32_t hi_pixel_mask = s->hi_pixel_mask; |
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const uint32_t lo_pixel_mask = s->lo_pixel_mask; |
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const uint32_t q_hi_pixel_mask = s->q_hi_pixel_mask; |
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const uint32_t q_lo_pixel_mask = s->q_lo_pixel_mask; |
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const int slice_start = (height * jobnr) / nb_jobs; |
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const int slice_end = (height * (jobnr+1)) / nb_jobs; |
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/* Point to the first 4 lines, first line is duplicated */ |
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src_line[0] = src + src_linesize*FFMAX(slice_start - 1, 0); |
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src_line[1] = src + src_linesize*slice_start; |
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src_line[2] = src + src_linesize*FFMIN(slice_start + 1, height-1); |
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src_line[3] = src + src_linesize*FFMIN(slice_start + 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 = s->is_be ? AV_RB16(src_line + 2 * off) : AV_RL16(src_line + 2 * off) |
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for (y = slice_start; y < slice_end; 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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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 (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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if (s->is_be) { |
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AV_WB32(dst_line[0] + x * 4, product1a | (product1b << 16)); |
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AV_WB32(dst_line[1] + x * 4, product2a | (product2b << 16)); |
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} else { |
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AV_WL32(dst_line[0] + x * 4, product1a | (product1b << 16)); |
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AV_WL32(dst_line[1] + x * 4, product2a | (product2b << 16)); |
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} |
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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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} // y loop |
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return 0; |
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} |
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static const enum AVPixelFormat pix_fmts[] = { |
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AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, |
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AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, |
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AV_PIX_FMT_RGB565BE, AV_PIX_FMT_BGR565BE, AV_PIX_FMT_RGB555BE, AV_PIX_FMT_BGR555BE, |
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AV_PIX_FMT_RGB565LE, AV_PIX_FMT_BGR565LE, AV_PIX_FMT_RGB555LE, AV_PIX_FMT_BGR555LE, |
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AV_PIX_FMT_NONE |
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}; |
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static int config_input(AVFilterLink *inlink) |
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{ |
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Super2xSaIContext *s = inlink->dst->priv; |
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s->hi_pixel_mask = 0xFEFEFEFE; |
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s->lo_pixel_mask = 0x01010101; |
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s->q_hi_pixel_mask = 0xFCFCFCFC; |
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s->q_lo_pixel_mask = 0x03030303; |
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s->bpp = 4; |
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switch (inlink->format) { |
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case AV_PIX_FMT_RGB24: |
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case AV_PIX_FMT_BGR24: |
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s->bpp = 3; |
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break; |
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case AV_PIX_FMT_RGB565BE: |
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case AV_PIX_FMT_BGR565BE: |
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s->is_be = 1; |
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case AV_PIX_FMT_RGB565LE: |
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case AV_PIX_FMT_BGR565LE: |
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s->hi_pixel_mask = 0xF7DEF7DE; |
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s->lo_pixel_mask = 0x08210821; |
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s->q_hi_pixel_mask = 0xE79CE79C; |
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s->q_lo_pixel_mask = 0x18631863; |
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s->bpp = 2; |
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break; |
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case AV_PIX_FMT_BGR555BE: |
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case AV_PIX_FMT_RGB555BE: |
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s->is_be = 1; |
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case AV_PIX_FMT_BGR555LE: |
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case AV_PIX_FMT_RGB555LE: |
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s->hi_pixel_mask = 0x7BDE7BDE; |
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s->lo_pixel_mask = 0x04210421; |
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s->q_hi_pixel_mask = 0x739C739C; |
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s->q_lo_pixel_mask = 0x0C630C63; |
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s->bpp = 2; |
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break; |
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} |
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return 0; |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterLink *inlink = outlink->src->inputs[0]; |
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outlink->w = inlink->w*2; |
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outlink->h = inlink->h*2; |
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av_log(inlink->dst, AV_LOG_VERBOSE, "fmt:%s size:%dx%d -> size:%dx%d\n", |
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av_get_pix_fmt_name(inlink->format), |
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inlink->w, inlink->h, outlink->w, outlink->h); |
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return 0; |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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ThreadData td; |
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AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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if (!out) { |
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av_frame_free(&in); |
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return AVERROR(ENOMEM); |
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} |
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av_frame_copy_props(out, in); |
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out->width = outlink->w; |
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out->height = outlink->h; |
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td.in = in, td.out = out; |
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ff_filter_execute(ctx, super2xsai, &td, NULL, |
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FFMIN(in->height, ff_filter_get_nb_threads(ctx))); |
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av_frame_free(&in); |
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return ff_filter_frame(outlink, out); |
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} |
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static const AVFilterPad super2xsai_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = config_input, |
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.filter_frame = filter_frame, |
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}, |
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}; |
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static const AVFilterPad super2xsai_outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = config_output, |
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}, |
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}; |
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const AVFilter ff_vf_super2xsai = { |
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.name = "super2xsai", |
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.description = NULL_IF_CONFIG_SMALL("Scale the input by 2x using the Super2xSaI pixel art algorithm."), |
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.priv_size = sizeof(Super2xSaIContext), |
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FILTER_INPUTS(super2xsai_inputs), |
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FILTER_OUTPUTS(super2xsai_outputs), |
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FILTER_PIXFMTS_ARRAY(pix_fmts), |
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.flags = AVFILTER_FLAG_SLICE_THREADS, |
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};
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