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Add super2xsai.c
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twinaphex
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315
gfx/filters/super2xsai.c
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315
gfx/filters/super2xsai.c
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/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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 with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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// Compile: gcc -o supertwoxsai.so -shared supertwoxsai.c -std=c99 -O3 -Wall -pedantic -fPIC
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#include "softfilter.h"
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#include <stdlib.h>
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#ifdef RARCH_INTERNAL
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#define softfilter_get_implementation supertwoxsai_get_implementation
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#endif
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#define SUPERTWOXSAI_SCALE 2
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static unsigned supertwoxsai_generic_input_fmts(void)
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{
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return SOFTFILTER_FMT_RGB565;
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}
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static unsigned supertwoxsai_generic_output_fmts(unsigned input_fmts)
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{
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return input_fmts;
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}
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static unsigned supertwoxsai_generic_threads(void *data)
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{
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struct filter_data *filt = (struct filter_data*)data;
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return filt->threads;
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}
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static void *supertwoxsai_generic_create(unsigned in_fmt, unsigned out_fmt,
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unsigned max_width, unsigned max_height,
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unsigned threads, softfilter_simd_mask_t simd)
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{
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(void)simd;
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struct filter_data *filt = (struct filter_data*)calloc(1, sizeof(*filt));
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if (!filt)
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return NULL;
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filt->workers = (struct softfilter_thread_data*)calloc(threads, sizeof(struct softfilter_thread_data));
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filt->threads = threads;
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filt->in_fmt = in_fmt;
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if (!filt->workers)
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{
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free(filt);
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return NULL;
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}
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return filt;
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}
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static void supertwoxsai_generic_output(void *data, unsigned *out_width, unsigned *out_height,
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unsigned width, unsigned height)
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{
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*out_width = width * SUPERTWOXSAI_SCALE;
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*out_height = height * SUPERTWOXSAI_SCALE;
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}
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static void supertwoxsai_generic_destroy(void *data)
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{
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struct filter_data *filt = (struct filter_data*)data;
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free(filt->workers);
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free(filt);
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}
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static inline uint16_t supertwoxsai_interpolate_rgb565(uint32_t A, uint32_t B)
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{
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uint32_t r;
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A |= (A << 16); /* unpack */
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A &= 0x7e0f81f;
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B |= (B << 16);
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B &= 0x7e0f81f;
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r = (A + B) >> 1; /* mix */
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r &= 0x7e0f81f; /* repack */
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return (r | (r >> 16));
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}
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static inline uint16_t supertwoxsai_interpolate2_rgb565(uint32_t A, uint32_t B, uint32_t C, uint32_t D)
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{
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uint32_t r;
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A |= (A << 16); /* unpack */
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A &= 0x7e0f81f;
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B |= (B << 16);
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B &= 0x7e0f81f;
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C |= (C << 16);
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C &= 0x7e0f81f;
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D |= (D << 16);
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D &= 0x7e0f81f;
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r = (A + B + C + D) >> 2; /* mix */
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r &= 0x7e0f81f; /* repack */
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return (r | (r >> 16));
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}
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static inline int supertwoxsai_result1_rgb565(uint16_t A, uint16_t B, uint16_t C, uint16_t D)
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{
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int x, y, r;
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x = 0;
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y = 0;
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r = 0;
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if (A == C)
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x += 1;
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else if (B == C)
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y += 1;
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if (A == D)
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x += 1;
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else if (B == D)
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y += 1;
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if (x <= 1)
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r += 1;
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if (y <= 1)
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r -= 1;
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return r;
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}
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static void supertwoxsai_write2_rgb565(uint16_t *out, uint16_t val0, uint16_t val1)
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{
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*((uint32_t*)out) = ((uint32_t)(val0) | ((uint32_t)(val1) << 16));
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}
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static void supertwoxsai_generic_rgb565(unsigned width, unsigned height,
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int first, int last, uint16_t *src,
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unsigned src_stride, uint16_t *dst, unsigned dst_stride)
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{
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typedef uint16_t typename_t;
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const unsigned nextline = (last) ? 0 : src_stride;
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for (; height; height--)
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{
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uint16_t *in = (uint16_t*)src;
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uint16_t *out = (uint16_t*)dst;
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for (unsigned finish = width; finish; finish -= 1)
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{
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typename_t product1a, product1b, product2a, product2b;
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//--------------------------- B1 B2
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// 4 5 6 S2
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// 1 2 3 S1
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// A1 A2
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const typename_t colorB0 = *(in - nextline - 1);
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const typename_t colorB1 = *(in - nextline + 0);
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const typename_t colorB2 = *(in - nextline + 1);
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const typename_t colorB3 = *(in - nextline + 2);
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const typename_t color4 = *(in - 1);
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const typename_t color5 = *(in + 0);
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const typename_t color6 = *(in + 1);
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const typename_t colorS2 = *(in + 2);
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const typename_t color1 = *(in + nextline - 1);
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const typename_t color2 = *(in + nextline + 0);
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const typename_t color3 = *(in + nextline + 1);
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const typename_t colorS1 = *(in + nextline + 2);
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const typename_t colorA0 = *(in + nextline + nextline - 1);
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const typename_t colorA1 = *(in + nextline + nextline + 0);
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const typename_t colorA2 = *(in + nextline + nextline + 1);
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const typename_t colorA3 = *(in + nextline + nextline + 2);
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//--------------------------------------
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if (color2 == color6 && color5 != color3)
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product2b = product1b = color2;
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else if (color5 == color3 && color2 != color6)
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product2b = product1b = color5;
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else if (color5 == color3 && color2 == color6)
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{
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int r = 0;
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r += supertwoxsai_result1_rgb565(color6, color5, color1, colorA1);
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r += supertwoxsai_result1_rgb565(color6, color5, color4, colorB1);
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r += supertwoxsai_result1_rgb565(color6, color5, colorA2, colorS1);
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r += supertwoxsai_result1_rgb565(color6, color5, colorB2, colorS2);
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if (r > 0)
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product2b = product1b = color6;
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else if (r < 0)
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product2b = product1b = color5;
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else
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product2b = product1b = supertwoxsai_interpolate_rgb565(color5, color6);
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}
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else
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{
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if (color6 == color3 && color3 == colorA1 &&
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color2 != colorA2 && color3 != colorA0)
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product2b = supertwoxsai_interpolate2_rgb565(color3, color3, color3, color2);
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else if ((color5 == color2 && color2 == colorA2) &
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(colorA1 != color3 && color2 != colorA3))
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product2b = supertwoxsai_interpolate2_rgb565(color2, color2, color2, color3);
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else
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product2b = supertwoxsai_interpolate_rgb565(color2, color3);
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if (color6 == color3 && color6 == colorB1 &&
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color5 != colorB2 && color6 != colorB0)
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product1b = supertwoxsai_interpolate2_rgb565(color6, color6, color6, color5);
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else if (color5 == color2 && color5 == colorB2 &&
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colorB1 != color6 && color5 != colorB3)
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product1b = supertwoxsai_interpolate2_rgb565(color6, color5, color5, color5);
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else
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product1b = supertwoxsai_interpolate_rgb565(color5, color6);
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}
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if (color5 == color3 && color2 != color6 &&
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color4 == color5 && color5 != colorA2)
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product2a = supertwoxsai_interpolate_rgb565(color2, color5);
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else if (color5 == color1 && color6 == color5 &&
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color4 != color2 && color5 != colorA0)
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product2a = supertwoxsai_interpolate_rgb565(color2, color5);
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else
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product2a = color2;
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if (color2 == color6 && color5 != color3 &&
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color1 == color2 && color2 != colorB2)
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product1a = supertwoxsai_interpolate_rgb565(color2, color5);
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else if (color4 == color2 && color3 == color2 &&
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color1 != color5 && color2 != colorB0)
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product1a = supertwoxsai_interpolate_rgb565(color2, color5);
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else
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product1a = color5;
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supertwoxsai_write2_rgb565(out, product1a, product1b);
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supertwoxsai_write2_rgb565(out + dst_stride, product2a, product2b);
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++in;
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out += 2;
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}
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src += src_stride;
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dst += 2 * dst_stride;
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}
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}
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static void supertwoxsai_work_cb_rgb565(void *data, void *thread_data)
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{
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struct softfilter_thread_data *thr = (struct softfilter_thread_data*)thread_data;
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uint16_t *input = (uint16_t*)thr->in_data;
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uint16_t *output = (uint16_t*)thr->out_data;
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unsigned width = thr->width;
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unsigned height = thr->height;
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supertwoxsai_generic_rgb565(width, height,
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thr->first, thr->last, input, thr->in_pitch / SOFTFILTER_BPP_RGB565, output, thr->out_pitch / SOFTFILTER_BPP_RGB565);
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}
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static void supertwoxsai_generic_packets(void *data,
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struct softfilter_work_packet *packets,
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void *output, size_t output_stride,
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const void *input, unsigned width, unsigned height, size_t input_stride)
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{
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struct filter_data *filt = (struct filter_data*)data;
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unsigned i;
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for (i = 0; i < filt->threads; i++)
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{
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struct softfilter_thread_data *thr = (struct softfilter_thread_data*)&filt->workers[i];
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unsigned y_start = (height * i) / filt->threads;
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unsigned y_end = (height * (i + 1)) / filt->threads;
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thr->out_data = (uint8_t*)output + y_start * SUPERTWOXSAI_SCALE * output_stride;
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thr->in_data = (const uint8_t*)input + y_start * input_stride;
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thr->out_pitch = output_stride;
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thr->in_pitch = input_stride;
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thr->width = width;
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thr->height = y_end - y_start;
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// Workers need to know if they can access pixels outside their given buffer.
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thr->first = y_start;
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thr->last = y_end == height;
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if (filt->in_fmt == SOFTFILTER_FMT_RGB565)
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packets[i].work = supertwoxsai_work_cb_rgb565;
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packets[i].thread_data = thr;
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}
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}
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static const struct softfilter_implementation supertwoxsai_generic = {
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supertwoxsai_generic_input_fmts,
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supertwoxsai_generic_output_fmts,
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supertwoxsai_generic_create,
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supertwoxsai_generic_destroy,
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supertwoxsai_generic_threads,
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supertwoxsai_generic_output,
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supertwoxsai_generic_packets,
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"Super2xSaI",
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SOFTFILTER_API_VERSION,
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};
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const struct softfilter_implementation *softfilter_get_implementation(softfilter_simd_mask_t simd)
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{
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(void)simd;
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return &supertwoxsai_generic;
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}
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#ifdef RARCH_INTERNAL
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#undef softfilter_get_implementation
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#endif
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