mirror of
https://github.com/libretro/RetroArch.git
synced 2024-12-18 06:37:49 +00:00
260 lines
7.6 KiB
C
260 lines
7.6 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2014 - Daniel De Matteis
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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 scale2x.so -shared scale2x.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 scale2x_get_implementation
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#define softfilter_thread_data scale2x_softfilter_thread_data
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#define filter_data scale2x_filter_data
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#endif
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#define SCALE2X_SCALE 2
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struct softfilter_thread_data
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{
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void *out_data;
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const void *in_data;
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size_t out_pitch;
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size_t in_pitch;
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unsigned colfmt;
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unsigned width;
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unsigned height;
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int first;
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int last;
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};
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struct filter_data
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{
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unsigned threads;
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struct softfilter_thread_data *workers;
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unsigned in_fmt;
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};
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#define SCALE2X_GENERIC(typename_t, width, height, first, last, src, src_stride, dst, dst_stride, out0, out1) \
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for (y = 0; y < height; ++y) \
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{ \
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const int prevline = ((y == 0) && first) ? 0 : src_stride; \
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const int nextline = ((y == height - 1) && last) ? 0 : src_stride; \
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\
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for (x = 0; x < width; ++x) \
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{ \
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const typename_t A = *(src - prevline); \
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const typename_t B = (x > 0) ? *(src - 1) : *src; \
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const typename_t C = *src; \
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const typename_t D = (x < width - 1) ? *(src + 1) : *src; \
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const typename_t E = *(src++ + nextline); \
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\
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if (A != E && B != D) \
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{ \
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*out0++ = (A == B ? A : C); \
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*out0++ = (A == D ? A : C); \
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*out1++ = (E == B ? E : C); \
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*out1++ = (E == D ? E : C); \
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} \
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else \
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{ \
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*out0++ = C; \
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*out0++ = C; \
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*out1++ = C; \
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*out1++ = C; \
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} \
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} \
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\
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src += src_stride - width; \
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out0 += dst_stride + dst_stride - (width * SCALE2X_SCALE); \
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out1 += dst_stride + dst_stride - (width * SCALE2X_SCALE); \
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}
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static void scale2x_generic_rgb565(unsigned width, unsigned height,
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int first, int last,
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const uint16_t *src, unsigned src_stride,
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uint16_t *dst, unsigned dst_stride)
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{
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unsigned x, y;
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uint16_t *out0, *out1;
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out0 = (uint16_t*)dst;
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out1 = (uint16_t*)(dst + dst_stride);
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SCALE2X_GENERIC(uint16_t, width, height, first, last,
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src, src_stride, dst, dst_stride, out0, out1);
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}
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static void scale2x_generic_xrgb8888(unsigned width, unsigned height,
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int first, int last,
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const uint32_t *src, unsigned src_stride,
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uint32_t *dst, unsigned dst_stride)
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{
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unsigned x, y;
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uint32_t *out0, *out1;
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out0 = (uint32_t*)dst;
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out1 = (uint32_t*)(dst + dst_stride);
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SCALE2X_GENERIC(uint32_t, width, height, first, last,
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src, src_stride, dst, dst_stride, out0, out1);
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}
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static unsigned scale2x_generic_input_fmts(void)
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{
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return SOFTFILTER_FMT_XRGB8888 | SOFTFILTER_FMT_RGB565;
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}
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static unsigned scale2x_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 scale2x_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 *scale2x_generic_create(const struct softfilter_config *config,
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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, void *userdata)
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{
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(void)simd;
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(void)config;
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(void)userdata;
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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*)
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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 scale2x_generic_output(void *data,
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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 * SCALE2X_SCALE;
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*out_height = height * SCALE2X_SCALE;
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}
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static void scale2x_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 void scale2x_work_cb_xrgb8888(void *data, void *thread_data)
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{
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struct softfilter_thread_data *thr =
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(struct softfilter_thread_data*)thread_data;
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const uint32_t *input = (const uint32_t*)thr->in_data;
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uint32_t *output = (uint32_t*)thr->out_data;
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unsigned width = thr->width;
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unsigned height = thr->height;
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scale2x_generic_xrgb8888(width, height,
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thr->first, thr->last, input,
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thr->in_pitch / SOFTFILTER_BPP_XRGB8888,
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output,
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thr->out_pitch / SOFTFILTER_BPP_XRGB8888);
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}
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static void scale2x_work_cb_rgb565(void *data, void *thread_data)
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{
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struct softfilter_thread_data *thr =
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(struct softfilter_thread_data*)thread_data;
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const uint16_t *input = (const 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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scale2x_generic_rgb565(width, height,
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thr->first, thr->last, input,
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thr->in_pitch / SOFTFILTER_BPP_RGB565,
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output,
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thr->out_pitch / SOFTFILTER_BPP_RGB565);
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}
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static void scale2x_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 =
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(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 *
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SCALE2X_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
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* 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_XRGB8888)
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packets[i].work = scale2x_work_cb_xrgb8888;
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else if (filt->in_fmt == SOFTFILTER_FMT_RGB565)
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packets[i].work = scale2x_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 scale2x_generic = {
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scale2x_generic_input_fmts,
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scale2x_generic_output_fmts,
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scale2x_generic_create,
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scale2x_generic_destroy,
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scale2x_generic_threads,
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scale2x_generic_output,
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scale2x_generic_packets,
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SOFTFILTER_API_VERSION,
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"Scale2x",
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"scale2x",
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};
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const struct softfilter_implementation *softfilter_get_implementation(
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softfilter_simd_mask_t simd)
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{
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(void)simd;
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return &scale2x_generic;
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}
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#ifdef RARCH_INTERNAL
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#undef softfilter_get_implementation
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#undef softfilter_thread_data
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#undef filter_data
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#endif
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