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RetroArch/gfx/filters/super2xsai.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
// Compile: gcc -o supertwoxsai.so -shared supertwoxsai.c -std=c99 -O3 -Wall -pedantic -fPIC
#include "softfilter.h"
#include <stdlib.h>
#ifdef RARCH_INTERNAL
#define softfilter_get_implementation supertwoxsai_get_implementation
#endif
#define SUPERTWOXSAI_SCALE 2
static unsigned supertwoxsai_generic_input_fmts(void)
{
return SOFTFILTER_FMT_RGB565;
}
static unsigned supertwoxsai_generic_output_fmts(unsigned input_fmts)
{
return input_fmts;
}
static unsigned supertwoxsai_generic_threads(void *data)
{
struct filter_data *filt = (struct filter_data*)data;
return filt->threads;
}
static void *supertwoxsai_generic_create(unsigned in_fmt, unsigned out_fmt,
unsigned max_width, unsigned max_height,
unsigned threads, softfilter_simd_mask_t simd)
{
(void)simd;
struct filter_data *filt = (struct filter_data*)calloc(1, sizeof(*filt));
if (!filt)
return NULL;
filt->workers = (struct softfilter_thread_data*)calloc(threads, sizeof(struct softfilter_thread_data));
filt->threads = threads;
filt->in_fmt = in_fmt;
if (!filt->workers)
{
free(filt);
return NULL;
}
return filt;
}
static void supertwoxsai_generic_output(void *data, unsigned *out_width, unsigned *out_height,
unsigned width, unsigned height)
{
*out_width = width * SUPERTWOXSAI_SCALE;
*out_height = height * SUPERTWOXSAI_SCALE;
}
static void supertwoxsai_generic_destroy(void *data)
{
struct filter_data *filt = (struct filter_data*)data;
free(filt->workers);
free(filt);
}
#ifndef result1_body
#define result1_body(A, B, C, D, x, y) \
if (A == C) \
x += 1; \
else if (B == C) \
y += 1; \
if (A == D) \
x += 1; \
else if (B == D) \
y += 1; \
if (x <= 1) \
r += 1; \
if (y <= 1) \
r -= 1
#endif
#ifndef interpolate_body
#define interpolate_body(A, B, r, pack_color) \
A |= (A << 16); /* unpack */ \
A &= pack_color; \
B |= (B << 16); \
B &= pack_color; \
r = (A + B) >> 1; /* mix */ \
r &= pack_color /* repack */
#endif
#ifndef interpolate2_body
#define interpolate2_body(A, B, C, D, r, pack_color) \
A |= (A << 16); /* unpack */ \
A &= pack_color; \
B |= (B << 16); \
B &= pack_color; \
C |= (C << 16); \
C &= pack_color; \
D |= (D << 16); \
D &= pack_color; \
r = (A + B + C + D) >> 2; /* mix */ \
r &= pack_color /* repack */
#endif
static inline uint16_t supertwoxsai_interpolate_rgb565(uint32_t A, uint32_t B)
{
uint32_t r;
interpolate_body(A, B, r, 0x7e0f81f);
return (r | (r >> 16));
}
static inline uint16_t supertwoxsai_interpolate2_rgb565(uint32_t A, uint32_t B, uint32_t C, uint32_t D)
{
uint32_t r;
interpolate2_body(A, B, C, D, r, 0x7e0f81f);
return (r | (r >> 16));
}
static inline int supertwoxsai_result1_rgb565(uint16_t A, uint16_t B, uint16_t C, uint16_t D)
{
int x, y, r;
x = 0;
y = 0;
r = 0;
result1_body(A, B, C, D, x, y);
return r;
}
static void supertwoxsai_write2_rgb565(uint16_t *out, uint16_t val0, uint16_t val1)
{
*((uint32_t*)out) = ((uint32_t)(val0) | ((uint32_t)(val1) << 16));
}
#ifndef supertwoxsai_declare_variables
#define supertwoxsai_declare_variables(typename_t, in, nextline) \
typename_t product1a, product1b, product2a, product2b; \
const typename_t colorB0 = *(in - nextline - 1); \
const typename_t colorB1 = *(in - nextline + 0); \
const typename_t colorB2 = *(in - nextline + 1); \
const typename_t colorB3 = *(in - nextline + 2); \
const typename_t color4 = *(in - 1); \
const typename_t color5 = *(in + 0); \
const typename_t color6 = *(in + 1); \
const typename_t colorS2 = *(in + 2); \
const typename_t color1 = *(in + nextline - 1); \
const typename_t color2 = *(in + nextline + 0); \
const typename_t color3 = *(in + nextline + 1); \
const typename_t colorS1 = *(in + nextline + 2); \
const typename_t colorA0 = *(in + nextline + nextline - 1); \
const typename_t colorA1 = *(in + nextline + nextline + 0); \
const typename_t colorA2 = *(in + nextline + nextline + 1); \
const typename_t colorA3 = *(in + nextline + nextline + 2)
#endif
#ifndef supertwoxsai_function
#define supertwoxsai_function(result1_cb, interpolate_cb, interpolate2_cb, write2_cb) \
if (color2 == color6 && color5 != color3) \
product2b = product1b = color2; \
else if (color5 == color3 && color2 != color6) \
product2b = product1b = color5; \
else if (color5 == color3 && color2 == color6) \
{ \
int r = 0; \
r += result1_cb(color6, color5, color1, colorA1); \
r += result1_cb(color6, color5, color4, colorB1); \
r += result1_cb(color6, color5, colorA2, colorS1); \
r += result1_cb(color6, color5, colorB2, colorS2); \
if (r > 0) \
product2b = product1b = color6; \
else if (r < 0) \
product2b = product1b = color5; \
else \
product2b = product1b = interpolate_cb(color5, color6); \
} \
else \
{ \
if (color6 == color3 && color3 == colorA1 && color2 != colorA2 && color3 != colorA0) \
product2b = interpolate2_cb(color3, color3, color3, color2); \
else if ((color5 == color2 && color2 == colorA2) & (colorA1 != color3 && color2 != colorA3)) \
product2b = interpolate2_cb(color2, color2, color2, color3); \
else \
product2b = interpolate_cb(color2, color3); \
if (color6 == color3 && color6 == colorB1 && color5 != colorB2 && color6 != colorB0) \
product1b = interpolate2_cb(color6, color6, color6, color5); \
else if (color5 == color2 && color5 == colorB2 && colorB1 != color6 && color5 != colorB3) \
product1b = interpolate2_cb(color6, color5, color5, color5); \
else \
product1b = interpolate_cb(color5, color6); \
} \
if (color5 == color3 && color2 != color6 && color4 == color5 && color5 != colorA2) \
product2a = interpolate_cb(color2, color5); \
else if (color5 == color1 && color6 == color5 && color4 != color2 && color5 != colorA0) \
product2a = interpolate_cb(color2, color5); \
else \
product2a = color2; \
if (color2 == color6 && color5 != color3 && color1 == color2 && color2 != colorB2) \
product1a = interpolate_cb(color2, color5); \
else if (color4 == color2 && color3 == color2 && color1 != color5 && color2 != colorB0) \
product1a = interpolate_cb(color2, color5); \
else \
product1a = color5; \
write2_cb(out, product1a, product1b); \
write2_cb(out + dst_stride, product2a, product2b); \
++in; \
out += 2
#endif
static void supertwoxsai_generic_rgb565(unsigned width, unsigned height,
int first, int last, uint16_t *src,
unsigned src_stride, uint16_t *dst, unsigned dst_stride)
{
const unsigned nextline = (last) ? 0 : src_stride;
for (; height; height--)
{
uint16_t *in = (uint16_t*)src;
uint16_t *out = (uint16_t*)dst;
for (unsigned finish = width; finish; finish -= 1)
{
supertwoxsai_declare_variables(uint16_t, in, nextline);
//--------------------------- B1 B2
// 4 5 6 S2
// 1 2 3 S1
// A1 A2
//--------------------------------------
supertwoxsai_function(supertwoxsai_result1_rgb565, supertwoxsai_interpolate_rgb565, supertwoxsai_interpolate2_rgb565, supertwoxsai_write2_rgb565);
}
src += src_stride;
dst += 2 * dst_stride;
}
}
static void supertwoxsai_work_cb_rgb565(void *data, void *thread_data)
{
struct softfilter_thread_data *thr = (struct softfilter_thread_data*)thread_data;
uint16_t *input = (uint16_t*)thr->in_data;
uint16_t *output = (uint16_t*)thr->out_data;
unsigned width = thr->width;
unsigned height = thr->height;
supertwoxsai_generic_rgb565(width, height,
thr->first, thr->last, input, thr->in_pitch / SOFTFILTER_BPP_RGB565, output, thr->out_pitch / SOFTFILTER_BPP_RGB565);
}
static void supertwoxsai_generic_packets(void *data,
struct softfilter_work_packet *packets,
void *output, size_t output_stride,
const void *input, unsigned width, unsigned height, size_t input_stride)
{
struct filter_data *filt = (struct filter_data*)data;
unsigned i;
for (i = 0; i < filt->threads; i++)
{
struct softfilter_thread_data *thr = (struct softfilter_thread_data*)&filt->workers[i];
unsigned y_start = (height * i) / filt->threads;
unsigned y_end = (height * (i + 1)) / filt->threads;
thr->out_data = (uint8_t*)output + y_start * SUPERTWOXSAI_SCALE * output_stride;
thr->in_data = (const uint8_t*)input + y_start * input_stride;
thr->out_pitch = output_stride;
thr->in_pitch = input_stride;
thr->width = width;
thr->height = y_end - y_start;
// Workers need to know if they can access pixels outside their given buffer.
thr->first = y_start;
thr->last = y_end == height;
if (filt->in_fmt == SOFTFILTER_FMT_RGB565)
packets[i].work = supertwoxsai_work_cb_rgb565;
packets[i].thread_data = thr;
}
}
static const struct softfilter_implementation supertwoxsai_generic = {
supertwoxsai_generic_input_fmts,
supertwoxsai_generic_output_fmts,
supertwoxsai_generic_create,
supertwoxsai_generic_destroy,
supertwoxsai_generic_threads,
supertwoxsai_generic_output,
supertwoxsai_generic_packets,
"Super2xSaI",
SOFTFILTER_API_VERSION,
};
const struct softfilter_implementation *softfilter_get_implementation(softfilter_simd_mask_t simd)
{
(void)simd;
return &supertwoxsai_generic;
}
#ifdef RARCH_INTERNAL
#undef softfilter_get_implementation
#endif
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