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NTSC filter.
This commit is contained in:
Themaister
parent
66c184862c
commit
123fd6f520
13
hqflt/ntsc.c
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13
hqflt/ntsc.c
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#include "ntsc.h"
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#include <stdlib.h>
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void ntsc_filter(uint16_t * restrict out, const uint16_t * restrict in, int width, int height)
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{
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static int phase = 0;
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snes_ntsc_t *ntsc = calloc(1, sizeof(snes_ntsc_t));
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snes_ntsc_init(ntsc, &snes_ntsc_composite);
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snes_ntsc_blit(ntsc, in, width, phase, width, height, out, SNES_NTSC_OUT_WIDTH(width) * sizeof(uint16_t));
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free(ntsc);
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phase = (phase + 1) % 4;
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}
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9
hqflt/ntsc.h
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hqflt/ntsc.h
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#ifndef _NTSC_FILTER_H
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#define _NTSC_FILTER_H
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#include <stdint.h>
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#include "snes_ntsc/snes_ntsc.h"
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void ntsc_filter(uint16_t * restrict out, const uint16_t * restrict in, int width, int height);
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#endif
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251
hqflt/snes_ntsc/snes_ntsc.c
Executable file
251
hqflt/snes_ntsc/snes_ntsc.c
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/* snes_ntsc 0.2.2. http://www.slack.net/~ant/ */
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#include "snes_ntsc.h"
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/* Copyright (C) 2006-2007 Shay Green. This module is free software; you
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can redistribute it and/or modify it under the terms of the GNU Lesser
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General Public License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version. This
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module is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details. You should have received a copy of the GNU Lesser General Public
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License along with this module; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
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snes_ntsc_setup_t const snes_ntsc_monochrome = { 0,-1, 0, 0,.2, 0,.2,-.2,-.2,-1, 1, 0, 0 };
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snes_ntsc_setup_t const snes_ntsc_composite = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 };
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snes_ntsc_setup_t const snes_ntsc_svideo = { 0, 0, 0, 0,.2, 0,.2, -1, -1, 0, 1, 0, 0 };
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snes_ntsc_setup_t const snes_ntsc_rgb = { 0, 0, 0, 0,.2, 0,.7, -1, -1,-1, 1, 0, 0 };
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#define alignment_count 3
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#define burst_count 3
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#define rescale_in 8
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#define rescale_out 7
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#define artifacts_mid 1.0f
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#define fringing_mid 1.0f
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#define std_decoder_hue 0
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#define rgb_bits 7 /* half normal range to allow for doubled hires pixels */
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#define gamma_size 32
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#include "snes_ntsc_impl.h"
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/* 3 input pixels -> 8 composite samples */
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pixel_info_t const snes_ntsc_pixels [alignment_count] = {
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{ PIXEL_OFFSET( -4, -9 ), { 1, 1, .6667f, 0 } },
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{ PIXEL_OFFSET( -2, -7 ), { .3333f, 1, 1, .3333f } },
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{ PIXEL_OFFSET( 0, -5 ), { 0, .6667f, 1, 1 } },
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};
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static void merge_kernel_fields( snes_ntsc_rgb_t* io )
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{
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int n;
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for ( n = burst_size; n; --n )
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{
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snes_ntsc_rgb_t p0 = io [burst_size * 0] + rgb_bias;
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snes_ntsc_rgb_t p1 = io [burst_size * 1] + rgb_bias;
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snes_ntsc_rgb_t p2 = io [burst_size * 2] + rgb_bias;
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/* merge colors without losing precision */
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io [burst_size * 0] =
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((p0 + p1 - ((p0 ^ p1) & snes_ntsc_rgb_builder)) >> 1) - rgb_bias;
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io [burst_size * 1] =
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((p1 + p2 - ((p1 ^ p2) & snes_ntsc_rgb_builder)) >> 1) - rgb_bias;
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io [burst_size * 2] =
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((p2 + p0 - ((p2 ^ p0) & snes_ntsc_rgb_builder)) >> 1) - rgb_bias;
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++io;
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}
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}
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static void correct_errors( snes_ntsc_rgb_t color, snes_ntsc_rgb_t* out )
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{
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int n;
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for ( n = burst_count; n; --n )
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{
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unsigned i;
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for ( i = 0; i < rgb_kernel_size / 2; i++ )
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{
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snes_ntsc_rgb_t error = color -
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out [i ] - out [(i+12)%14+14] - out [(i+10)%14+28] -
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out [i + 7] - out [i + 5 +14] - out [i + 3 +28];
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DISTRIBUTE_ERROR( i+3+28, i+5+14, i+7 );
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}
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out += alignment_count * rgb_kernel_size;
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}
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}
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void snes_ntsc_init( snes_ntsc_t* ntsc, snes_ntsc_setup_t const* setup )
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{
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int merge_fields;
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int entry;
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init_t impl;
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if ( !setup )
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setup = &snes_ntsc_composite;
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init( &impl, setup );
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merge_fields = setup->merge_fields;
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if ( setup->artifacts <= -1 && setup->fringing <= -1 )
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merge_fields = 1;
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for ( entry = 0; entry < snes_ntsc_palette_size; entry++ )
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{
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/* Reduce number of significant bits of source color. Clearing the
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low bits of R and B were least notictable. Modifying green was too
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noticeable. */
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int ir = entry >> 8 & 0x1E;
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int ig = entry >> 4 & 0x1F;
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int ib = entry << 1 & 0x1E;
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#if SNES_NTSC_BSNES_COLORTBL
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if ( setup->bsnes_colortbl )
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{
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int bgr15 = (ib << 10) | (ig << 5) | ir;
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unsigned long rgb16 = setup->bsnes_colortbl [bgr15];
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ir = rgb16 >> 11 & 0x1E;
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ig = rgb16 >> 6 & 0x1F;
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ib = rgb16 & 0x1E;
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}
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#endif
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{
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float rr = impl.to_float [ir];
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float gg = impl.to_float [ig];
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float bb = impl.to_float [ib];
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float y, i, q = RGB_TO_YIQ( rr, gg, bb, y, i );
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int r, g, b = YIQ_TO_RGB( y, i, q, impl.to_rgb, int, r, g );
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snes_ntsc_rgb_t rgb = PACK_RGB( r, g, b );
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snes_ntsc_rgb_t* out = ntsc->table [entry];
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gen_kernel( &impl, y, i, q, out );
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if ( merge_fields )
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merge_kernel_fields( out );
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correct_errors( rgb, out );
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}
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}
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}
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#ifndef SNES_NTSC_NO_BLITTERS
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void snes_ntsc_blit( snes_ntsc_t const* ntsc, SNES_NTSC_IN_T const* input, long in_row_width,
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int burst_phase, int in_width, int in_height, void* rgb_out, long out_pitch )
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{
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int chunk_count = (in_width - 1) / snes_ntsc_in_chunk;
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for ( ; in_height; --in_height )
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{
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SNES_NTSC_IN_T const* line_in = input;
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SNES_NTSC_BEGIN_ROW( ntsc, burst_phase,
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snes_ntsc_black, snes_ntsc_black, SNES_NTSC_ADJ_IN( *line_in ) );
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snes_ntsc_out_t* restrict line_out = (snes_ntsc_out_t*) rgb_out;
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int n;
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++line_in;
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for ( n = chunk_count; n; --n )
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{
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/* order of input and output pixels must not be altered */
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SNES_NTSC_COLOR_IN( 0, SNES_NTSC_ADJ_IN( line_in [0] ) );
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SNES_NTSC_RGB_OUT( 0, line_out [0], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_RGB_OUT( 1, line_out [1], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 1, SNES_NTSC_ADJ_IN( line_in [1] ) );
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SNES_NTSC_RGB_OUT( 2, line_out [2], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_RGB_OUT( 3, line_out [3], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 2, SNES_NTSC_ADJ_IN( line_in [2] ) );
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SNES_NTSC_RGB_OUT( 4, line_out [4], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_RGB_OUT( 5, line_out [5], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_RGB_OUT( 6, line_out [6], SNES_NTSC_OUT_DEPTH );
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line_in += 3;
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line_out += 7;
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}
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/* finish final pixels */
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SNES_NTSC_COLOR_IN( 0, snes_ntsc_black );
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SNES_NTSC_RGB_OUT( 0, line_out [0], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_RGB_OUT( 1, line_out [1], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 1, snes_ntsc_black );
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SNES_NTSC_RGB_OUT( 2, line_out [2], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_RGB_OUT( 3, line_out [3], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 2, snes_ntsc_black );
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SNES_NTSC_RGB_OUT( 4, line_out [4], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_RGB_OUT( 5, line_out [5], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_RGB_OUT( 6, line_out [6], SNES_NTSC_OUT_DEPTH );
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burst_phase = (burst_phase + 1) % snes_ntsc_burst_count;
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input += in_row_width;
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rgb_out = (char*) rgb_out + out_pitch;
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}
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}
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void snes_ntsc_blit_hires( snes_ntsc_t const* ntsc, SNES_NTSC_IN_T const* input, long in_row_width,
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int burst_phase, int in_width, int in_height, void* rgb_out, long out_pitch )
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{
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int chunk_count = (in_width - 2) / (snes_ntsc_in_chunk * 2);
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for ( ; in_height; --in_height )
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{
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SNES_NTSC_IN_T const* line_in = input;
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SNES_NTSC_HIRES_ROW( ntsc, burst_phase,
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snes_ntsc_black, snes_ntsc_black, snes_ntsc_black,
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SNES_NTSC_ADJ_IN( line_in [0] ),
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SNES_NTSC_ADJ_IN( line_in [1] ) );
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snes_ntsc_out_t* restrict line_out = (snes_ntsc_out_t*) rgb_out;
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int n;
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line_in += 2;
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for ( n = chunk_count; n; --n )
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{
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/* twice as many input pixels per chunk */
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SNES_NTSC_COLOR_IN( 0, SNES_NTSC_ADJ_IN( line_in [0] ) );
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SNES_NTSC_HIRES_OUT( 0, line_out [0], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 1, SNES_NTSC_ADJ_IN( line_in [1] ) );
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SNES_NTSC_HIRES_OUT( 1, line_out [1], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 2, SNES_NTSC_ADJ_IN( line_in [2] ) );
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SNES_NTSC_HIRES_OUT( 2, line_out [2], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 3, SNES_NTSC_ADJ_IN( line_in [3] ) );
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SNES_NTSC_HIRES_OUT( 3, line_out [3], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 4, SNES_NTSC_ADJ_IN( line_in [4] ) );
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SNES_NTSC_HIRES_OUT( 4, line_out [4], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 5, SNES_NTSC_ADJ_IN( line_in [5] ) );
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SNES_NTSC_HIRES_OUT( 5, line_out [5], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_HIRES_OUT( 6, line_out [6], SNES_NTSC_OUT_DEPTH );
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line_in += 6;
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line_out += 7;
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}
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SNES_NTSC_COLOR_IN( 0, snes_ntsc_black );
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SNES_NTSC_HIRES_OUT( 0, line_out [0], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 1, snes_ntsc_black );
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SNES_NTSC_HIRES_OUT( 1, line_out [1], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 2, snes_ntsc_black );
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SNES_NTSC_HIRES_OUT( 2, line_out [2], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 3, snes_ntsc_black );
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SNES_NTSC_HIRES_OUT( 3, line_out [3], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 4, snes_ntsc_black );
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SNES_NTSC_HIRES_OUT( 4, line_out [4], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_COLOR_IN( 5, snes_ntsc_black );
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SNES_NTSC_HIRES_OUT( 5, line_out [5], SNES_NTSC_OUT_DEPTH );
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SNES_NTSC_HIRES_OUT( 6, line_out [6], SNES_NTSC_OUT_DEPTH );
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burst_phase = (burst_phase + 1) % snes_ntsc_burst_count;
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input += in_row_width;
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rgb_out = (char*) rgb_out + out_pitch;
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}
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}
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#endif
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236
hqflt/snes_ntsc/snes_ntsc.h
Executable file
236
hqflt/snes_ntsc/snes_ntsc.h
Executable file
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/* SNES NTSC video filter */
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/* snes_ntsc 0.2.2 */
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#ifndef SNES_NTSC_H
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#define SNES_NTSC_H
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#include "snes_ntsc_config.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Image parameters, ranging from -1.0 to 1.0. Actual internal values shown
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in parenthesis and should remain fairly stable in future versions. */
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typedef struct snes_ntsc_setup_t
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{
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/* Basic parameters */
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double hue; /* -1 = -180 degrees +1 = +180 degrees */
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double saturation; /* -1 = grayscale (0.0) +1 = oversaturated colors (2.0) */
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double contrast; /* -1 = dark (0.5) +1 = light (1.5) */
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double brightness; /* -1 = dark (0.5) +1 = light (1.5) */
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double sharpness; /* edge contrast enhancement/blurring */
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/* Advanced parameters */
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double gamma; /* -1 = dark (1.5) +1 = light (0.5) */
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double resolution; /* image resolution */
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double artifacts; /* artifacts caused by color changes */
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double fringing; /* color artifacts caused by brightness changes */
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double bleed; /* color bleed (color resolution reduction) */
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int merge_fields; /* if 1, merges even and odd fields together to reduce flicker */
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float const* decoder_matrix; /* optional RGB decoder matrix, 6 elements */
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||||||
|
unsigned long const* bsnes_colortbl; /* undocumented; set to 0 */
|
||||||
|
} snes_ntsc_setup_t;
|
||||||
|
|
||||||
|
/* Video format presets */
|
||||||
|
extern snes_ntsc_setup_t const snes_ntsc_composite; /* color bleeding + artifacts */
|
||||||
|
extern snes_ntsc_setup_t const snes_ntsc_svideo; /* color bleeding only */
|
||||||
|
extern snes_ntsc_setup_t const snes_ntsc_rgb; /* crisp image */
|
||||||
|
extern snes_ntsc_setup_t const snes_ntsc_monochrome;/* desaturated + artifacts */
|
||||||
|
|
||||||
|
/* Initializes and adjusts parameters. Can be called multiple times on the same
|
||||||
|
snes_ntsc_t object. Can pass NULL for either parameter. */
|
||||||
|
typedef struct snes_ntsc_t snes_ntsc_t;
|
||||||
|
void snes_ntsc_init( snes_ntsc_t* ntsc, snes_ntsc_setup_t const* setup );
|
||||||
|
|
||||||
|
/* Filters one or more rows of pixels. Input pixel format is set by SNES_NTSC_IN_FORMAT
|
||||||
|
and output RGB depth is set by SNES_NTSC_OUT_DEPTH. Both default to 16-bit RGB.
|
||||||
|
In_row_width is the number of pixels to get to the next input row. Out_pitch
|
||||||
|
is the number of *bytes* to get to the next output row. */
|
||||||
|
void snes_ntsc_blit( snes_ntsc_t const* ntsc, SNES_NTSC_IN_T const* input,
|
||||||
|
long in_row_width, int burst_phase, int in_width, int in_height,
|
||||||
|
void* rgb_out, long out_pitch );
|
||||||
|
|
||||||
|
void snes_ntsc_blit_hires( snes_ntsc_t const* ntsc, SNES_NTSC_IN_T const* input,
|
||||||
|
long in_row_width, int burst_phase, int in_width, int in_height,
|
||||||
|
void* rgb_out, long out_pitch );
|
||||||
|
|
||||||
|
/* Number of output pixels written by low-res blitter for given input width. Width
|
||||||
|
might be rounded down slightly; use SNES_NTSC_IN_WIDTH() on result to find rounded
|
||||||
|
value. Guaranteed not to round 256 down at all. */
|
||||||
|
#define SNES_NTSC_OUT_WIDTH( in_width ) \
|
||||||
|
((((in_width) - 1) / snes_ntsc_in_chunk + 1) * snes_ntsc_out_chunk)
|
||||||
|
|
||||||
|
/* Number of low-res input pixels that will fit within given output width. Might be
|
||||||
|
rounded down slightly; use SNES_NTSC_OUT_WIDTH() on result to find rounded
|
||||||
|
value. */
|
||||||
|
#define SNES_NTSC_IN_WIDTH( out_width ) \
|
||||||
|
(((out_width) / snes_ntsc_out_chunk - 1) * snes_ntsc_in_chunk + 1)
|
||||||
|
|
||||||
|
|
||||||
|
/* Interface for user-defined custom blitters */
|
||||||
|
|
||||||
|
enum { snes_ntsc_in_chunk = 3 }; /* number of input pixels read per chunk */
|
||||||
|
enum { snes_ntsc_out_chunk = 7 }; /* number of output pixels generated per chunk */
|
||||||
|
enum { snes_ntsc_black = 0 }; /* palette index for black */
|
||||||
|
enum { snes_ntsc_burst_count = 3 }; /* burst phase cycles through 0, 1, and 2 */
|
||||||
|
|
||||||
|
/* Begins outputting row and starts three pixels. First pixel will be cut off a bit.
|
||||||
|
Use snes_ntsc_black for unused pixels. Declares variables, so must be before first
|
||||||
|
statement in a block (unless you're using C++). */
|
||||||
|
#define SNES_NTSC_BEGIN_ROW( ntsc, burst, pixel0, pixel1, pixel2 ) \
|
||||||
|
char const* ktable = \
|
||||||
|
(char const*) (ntsc)->table + burst * (snes_ntsc_burst_size * sizeof (snes_ntsc_rgb_t));\
|
||||||
|
SNES_NTSC_BEGIN_ROW_6_( pixel0, pixel1, pixel2, SNES_NTSC_IN_FORMAT, ktable )
|
||||||
|
|
||||||
|
/* Begins input pixel */
|
||||||
|
#define SNES_NTSC_COLOR_IN( index, color ) \
|
||||||
|
SNES_NTSC_COLOR_IN_( index, color, SNES_NTSC_IN_FORMAT, ktable )
|
||||||
|
|
||||||
|
/* Generates output pixel. Bits can be 24, 16, 15, 14, 32 (treated as 24), or 0:
|
||||||
|
24: RRRRRRRR GGGGGGGG BBBBBBBB (8-8-8 RGB)
|
||||||
|
16: RRRRRGGG GGGBBBBB (5-6-5 RGB)
|
||||||
|
15: RRRRRGG GGGBBBBB (5-5-5 RGB)
|
||||||
|
14: BBBBBGG GGGRRRRR (5-5-5 BGR, native SNES format)
|
||||||
|
0: xxxRRRRR RRRxxGGG GGGGGxxB BBBBBBBx (native internal format; x = junk bits) */
|
||||||
|
#define SNES_NTSC_RGB_OUT( index, rgb_out, bits ) \
|
||||||
|
SNES_NTSC_RGB_OUT_14_( index, rgb_out, bits, 1 )
|
||||||
|
|
||||||
|
/* Hires equivalents */
|
||||||
|
#define SNES_NTSC_HIRES_ROW( ntsc, burst, pixel1, pixel2, pixel3, pixel4, pixel5 ) \
|
||||||
|
char const* ktable = \
|
||||||
|
(char const*) (ntsc)->table + burst * (snes_ntsc_burst_size * sizeof (snes_ntsc_rgb_t));\
|
||||||
|
unsigned const snes_ntsc_pixel1_ = (pixel1);\
|
||||||
|
snes_ntsc_rgb_t const* kernel1 = SNES_NTSC_IN_FORMAT( ktable, snes_ntsc_pixel1_ );\
|
||||||
|
unsigned const snes_ntsc_pixel2_ = (pixel2);\
|
||||||
|
snes_ntsc_rgb_t const* kernel2 = SNES_NTSC_IN_FORMAT( ktable, snes_ntsc_pixel2_ );\
|
||||||
|
unsigned const snes_ntsc_pixel3_ = (pixel3);\
|
||||||
|
snes_ntsc_rgb_t const* kernel3 = SNES_NTSC_IN_FORMAT( ktable, snes_ntsc_pixel3_ );\
|
||||||
|
unsigned const snes_ntsc_pixel4_ = (pixel4);\
|
||||||
|
snes_ntsc_rgb_t const* kernel4 = SNES_NTSC_IN_FORMAT( ktable, snes_ntsc_pixel4_ );\
|
||||||
|
unsigned const snes_ntsc_pixel5_ = (pixel5);\
|
||||||
|
snes_ntsc_rgb_t const* kernel5 = SNES_NTSC_IN_FORMAT( ktable, snes_ntsc_pixel5_ );\
|
||||||
|
snes_ntsc_rgb_t const* kernel0 = kernel1;\
|
||||||
|
snes_ntsc_rgb_t const* kernelx0;\
|
||||||
|
snes_ntsc_rgb_t const* kernelx1 = kernel1;\
|
||||||
|
snes_ntsc_rgb_t const* kernelx2 = kernel1;\
|
||||||
|
snes_ntsc_rgb_t const* kernelx3 = kernel1;\
|
||||||
|
snes_ntsc_rgb_t const* kernelx4 = kernel1;\
|
||||||
|
snes_ntsc_rgb_t const* kernelx5 = kernel1
|
||||||
|
|
||||||
|
#define SNES_NTSC_HIRES_OUT( x, rgb_out, bits ) {\
|
||||||
|
snes_ntsc_rgb_t raw_ =\
|
||||||
|
kernel0 [ x ] + kernel2 [(x+5)%7+14] + kernel4 [(x+3)%7+28] +\
|
||||||
|
kernelx0 [(x+7)%7+7] + kernelx2 [(x+5)%7+21] + kernelx4 [(x+3)%7+35] +\
|
||||||
|
kernel1 [(x+6)%7 ] + kernel3 [(x+4)%7+14] + kernel5 [(x+2)%7+28] +\
|
||||||
|
kernelx1 [(x+6)%7+7] + kernelx3 [(x+4)%7+21] + kernelx5 [(x+2)%7+35];\
|
||||||
|
SNES_NTSC_CLAMP_( raw_, 0 );\
|
||||||
|
SNES_NTSC_RGB_OUT_( rgb_out, (bits), 0 );\
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/* private */
|
||||||
|
enum { snes_ntsc_entry_size = 128 };
|
||||||
|
enum { snes_ntsc_palette_size = 0x2000 };
|
||||||
|
typedef unsigned long snes_ntsc_rgb_t;
|
||||||
|
struct snes_ntsc_t {
|
||||||
|
snes_ntsc_rgb_t table [snes_ntsc_palette_size] [snes_ntsc_entry_size];
|
||||||
|
};
|
||||||
|
enum { snes_ntsc_burst_size = snes_ntsc_entry_size / snes_ntsc_burst_count };
|
||||||
|
|
||||||
|
#define SNES_NTSC_RGB16( ktable, n ) \
|
||||||
|
(snes_ntsc_rgb_t const*) (ktable + ((n & 0x001E) | (n >> 1 & 0x03E0) | (n >> 2 & 0x3C00)) * \
|
||||||
|
(snes_ntsc_entry_size / 2 * sizeof (snes_ntsc_rgb_t)))
|
||||||
|
|
||||||
|
#define SNES_NTSC_BGR15( ktable, n ) \
|
||||||
|
(snes_ntsc_rgb_t const*) (ktable + ((n << 9 & 0x3C00) | (n & 0x03E0) | (n >> 10 & 0x001E)) * \
|
||||||
|
(snes_ntsc_entry_size / 2 * sizeof (snes_ntsc_rgb_t)))
|
||||||
|
|
||||||
|
/* common 3->7 ntsc macros */
|
||||||
|
#define SNES_NTSC_BEGIN_ROW_6_( pixel0, pixel1, pixel2, ENTRY, table ) \
|
||||||
|
unsigned const snes_ntsc_pixel0_ = (pixel0);\
|
||||||
|
snes_ntsc_rgb_t const* kernel0 = ENTRY( table, snes_ntsc_pixel0_ );\
|
||||||
|
unsigned const snes_ntsc_pixel1_ = (pixel1);\
|
||||||
|
snes_ntsc_rgb_t const* kernel1 = ENTRY( table, snes_ntsc_pixel1_ );\
|
||||||
|
unsigned const snes_ntsc_pixel2_ = (pixel2);\
|
||||||
|
snes_ntsc_rgb_t const* kernel2 = ENTRY( table, snes_ntsc_pixel2_ );\
|
||||||
|
snes_ntsc_rgb_t const* kernelx0;\
|
||||||
|
snes_ntsc_rgb_t const* kernelx1 = kernel0;\
|
||||||
|
snes_ntsc_rgb_t const* kernelx2 = kernel0
|
||||||
|
|
||||||
|
#define SNES_NTSC_RGB_OUT_14_( x, rgb_out, bits, shift ) {\
|
||||||
|
snes_ntsc_rgb_t raw_ =\
|
||||||
|
kernel0 [x ] + kernel1 [(x+12)%7+14] + kernel2 [(x+10)%7+28] +\
|
||||||
|
kernelx0 [(x+7)%14] + kernelx1 [(x+ 5)%7+21] + kernelx2 [(x+ 3)%7+35];\
|
||||||
|
SNES_NTSC_CLAMP_( raw_, shift );\
|
||||||
|
SNES_NTSC_RGB_OUT_( rgb_out, bits, shift );\
|
||||||
|
}
|
||||||
|
|
||||||
|
/* common ntsc macros */
|
||||||
|
#define snes_ntsc_rgb_builder ((1L << 21) | (1 << 11) | (1 << 1))
|
||||||
|
#define snes_ntsc_clamp_mask (snes_ntsc_rgb_builder * 3 / 2)
|
||||||
|
#define snes_ntsc_clamp_add (snes_ntsc_rgb_builder * 0x101)
|
||||||
|
#define SNES_NTSC_CLAMP_( io, shift ) {\
|
||||||
|
snes_ntsc_rgb_t sub = (io) >> (9-(shift)) & snes_ntsc_clamp_mask;\
|
||||||
|
snes_ntsc_rgb_t clamp = snes_ntsc_clamp_add - sub;\
|
||||||
|
io |= clamp;\
|
||||||
|
clamp -= sub;\
|
||||||
|
io &= clamp;\
|
||||||
|
}
|
||||||
|
|
||||||
|
#define SNES_NTSC_COLOR_IN_( index, color, ENTRY, table ) {\
|
||||||
|
unsigned color_;\
|
||||||
|
kernelx##index = kernel##index;\
|
||||||
|
kernel##index = (color_ = (color), ENTRY( table, color_ ));\
|
||||||
|
}
|
||||||
|
|
||||||
|
/* x is always zero except in snes_ntsc library */
|
||||||
|
/* original routine */
|
||||||
|
#if 0
|
||||||
|
#define SNES_NTSC_RGB_OUT_( rgb_out, bits, x ) {\
|
||||||
|
if ( bits == 16 )\
|
||||||
|
rgb_out = (raw_>>(13-x)& 0xF800)|(raw_>>(8-x)&0x07E0)|(raw_>>(4-x)&0x001F);\
|
||||||
|
if ( bits == 24 || bits == 32 )\
|
||||||
|
rgb_out = (raw_>>(5-x)&0xFF0000)|(raw_>>(3-x)&0xFF00)|(raw_>>(1-x)&0xFF);\
|
||||||
|
if ( bits == 15 )\
|
||||||
|
rgb_out = (raw_>>(14-x)& 0x7C00)|(raw_>>(9-x)&0x03E0)|(raw_>>(4-x)&0x001F);\
|
||||||
|
if ( bits == 14 )\
|
||||||
|
rgb_out = (raw_>>(24-x)& 0x001F)|(raw_>>(9-x)&0x03E0)|(raw_<<(6+x)&0x7C00);\
|
||||||
|
if ( bits == 0 )\
|
||||||
|
rgb_out = raw_ << x;\
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define SNES_NTSC_RGB_OUT_( rgb_out, bits, x ) {\
|
||||||
|
rgb_out = (raw_>>(14-x)& 0x7C00)|(raw_>>(9-x)&0x03E0)|(raw_>>(4-x)&0x001F);\
|
||||||
|
}
|
||||||
|
|
||||||
|
// Custom SSNES routine for 15 bit.
|
||||||
|
|
||||||
|
/* custom bsnes routine -- hooks into bsnes colortable */
|
||||||
|
#if 0
|
||||||
|
#define SNES_NTSC_RGB_OUT_( rgb_out, bits, x ) {\
|
||||||
|
if ( bits == 16 ) {\
|
||||||
|
rgb_out = (raw_>>(13-x)& 0xF800)|(raw_>>(8-x)&0x07E0)|(raw_>>(4-x)&0x001F);\
|
||||||
|
rgb_out = ((rgb_out&0xf800)>>11)|((rgb_out&0x07c0)>>1)|((rgb_out&0x001f)<<10);\
|
||||||
|
rgb_out = colortable[rgb_out];\
|
||||||
|
} else if ( bits == 24 || bits == 32 ) {\
|
||||||
|
rgb_out = (raw_>>(5-x)&0xFF0000)|(raw_>>(3-x)&0xFF00)|(raw_>>(1-x)&0xFF);\
|
||||||
|
rgb_out = ((rgb_out&0xf80000)>>19)|((rgb_out&0x00f800)>>6)|((rgb_out&0x0000f8)<<7);\
|
||||||
|
rgb_out = colortable[rgb_out];\
|
||||||
|
} else if ( bits == 15 ) {\
|
||||||
|
rgb_out = (raw_>>(14-x)& 0x7C00)|(raw_>>(9-x)&0x03E0)|(raw_>>(4-x)&0x001F);\
|
||||||
|
rgb_out = ((rgb_out&0x7c00)>>10)|((rgb_out&0x03e0))|((rgb_out&0x001f)<<10);\
|
||||||
|
rgb_out = colortable[rgb_out];\
|
||||||
|
} else {\
|
||||||
|
rgb_out = raw_ << x;\
|
||||||
|
}\
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif
|
||||||
27
hqflt/snes_ntsc/snes_ntsc_config.h
Executable file
27
hqflt/snes_ntsc/snes_ntsc_config.h
Executable file
@ -0,0 +1,27 @@
|
|||||||
|
/* Configure library by modifying this file */
|
||||||
|
|
||||||
|
#ifndef SNES_NTSC_CONFIG_H
|
||||||
|
#define SNES_NTSC_CONFIG_H
|
||||||
|
|
||||||
|
/* Format of source pixels */
|
||||||
|
/* #define SNES_NTSC_IN_FORMAT SNES_NTSC_RGB16 */
|
||||||
|
#define SNES_NTSC_IN_FORMAT SNES_NTSC_BGR15
|
||||||
|
|
||||||
|
/* The following affect the built-in blitter only; a custom blitter can
|
||||||
|
handle things however it wants. */
|
||||||
|
|
||||||
|
/* Bits per pixel of output. Can be 15, 16, 32, or 24 (same as 32). */
|
||||||
|
#define SNES_NTSC_OUT_DEPTH 15
|
||||||
|
|
||||||
|
/* Type of input pixel values */
|
||||||
|
#define SNES_NTSC_IN_T unsigned short
|
||||||
|
|
||||||
|
/* Each raw pixel input value is passed through this. You might want to mask
|
||||||
|
the pixel index if you use the high bits as flags, etc. */
|
||||||
|
#define SNES_NTSC_ADJ_IN( in ) (((in >> 10) & 0x1F) | (in & 0x3E0) | ((in << 10) & 0x7C00))
|
||||||
|
|
||||||
|
|
||||||
|
/* For each pixel, this is the basic operation:
|
||||||
|
output_color = SNES_NTSC_ADJ_IN( SNES_NTSC_IN_T ) */
|
||||||
|
|
||||||
|
#endif
|
||||||
439
hqflt/snes_ntsc/snes_ntsc_impl.h
Executable file
439
hqflt/snes_ntsc/snes_ntsc_impl.h
Executable file
@ -0,0 +1,439 @@
|
|||||||
|
/* snes_ntsc 0.2.2. http://www.slack.net/~ant/ */
|
||||||
|
|
||||||
|
/* Common implementation of NTSC filters */
|
||||||
|
|
||||||
|
#include <assert.h>
|
||||||
|
#include <math.h>
|
||||||
|
|
||||||
|
/* Copyright (C) 2006 Shay Green. This module is free software; you
|
||||||
|
can redistribute it and/or modify it under the terms of the GNU Lesser
|
||||||
|
General Public License as published by the Free Software Foundation; either
|
||||||
|
version 2.1 of the License, or (at your option) any later version. This
|
||||||
|
module 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 Lesser General Public License for more
|
||||||
|
details. You should have received a copy of the GNU Lesser General Public
|
||||||
|
License along with this module; if not, write to the Free Software Foundation,
|
||||||
|
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
|
||||||
|
|
||||||
|
#define DISABLE_CORRECTION 0
|
||||||
|
|
||||||
|
#undef PI
|
||||||
|
#define PI 3.14159265358979323846f
|
||||||
|
|
||||||
|
#ifndef LUMA_CUTOFF
|
||||||
|
#define LUMA_CUTOFF 0.20
|
||||||
|
#endif
|
||||||
|
#ifndef gamma_size
|
||||||
|
#define gamma_size 1
|
||||||
|
#endif
|
||||||
|
#ifndef rgb_bits
|
||||||
|
#define rgb_bits 8
|
||||||
|
#endif
|
||||||
|
#ifndef artifacts_max
|
||||||
|
#define artifacts_max (artifacts_mid * 1.5f)
|
||||||
|
#endif
|
||||||
|
#ifndef fringing_max
|
||||||
|
#define fringing_max (fringing_mid * 2)
|
||||||
|
#endif
|
||||||
|
#ifndef STD_HUE_CONDITION
|
||||||
|
#define STD_HUE_CONDITION( setup ) 1
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define ext_decoder_hue (std_decoder_hue + 15)
|
||||||
|
#define rgb_unit (1 << rgb_bits)
|
||||||
|
#define rgb_offset (rgb_unit * 2 + 0.5f)
|
||||||
|
|
||||||
|
enum { burst_size = snes_ntsc_entry_size / burst_count };
|
||||||
|
enum { kernel_half = 16 };
|
||||||
|
enum { kernel_size = kernel_half * 2 + 1 };
|
||||||
|
|
||||||
|
typedef struct init_t
|
||||||
|
{
|
||||||
|
float to_rgb [burst_count * 6];
|
||||||
|
float to_float [gamma_size];
|
||||||
|
float contrast;
|
||||||
|
float brightness;
|
||||||
|
float artifacts;
|
||||||
|
float fringing;
|
||||||
|
float kernel [rescale_out * kernel_size * 2];
|
||||||
|
} init_t;
|
||||||
|
|
||||||
|
#define ROTATE_IQ( i, q, sin_b, cos_b ) {\
|
||||||
|
float t;\
|
||||||
|
t = i * cos_b - q * sin_b;\
|
||||||
|
q = i * sin_b + q * cos_b;\
|
||||||
|
i = t;\
|
||||||
|
}
|
||||||
|
|
||||||
|
static void init_filters( init_t* impl, snes_ntsc_setup_t const* setup )
|
||||||
|
{
|
||||||
|
#if rescale_out > 1
|
||||||
|
float kernels [kernel_size * 2];
|
||||||
|
#else
|
||||||
|
float* const kernels = impl->kernel;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* generate luma (y) filter using sinc kernel */
|
||||||
|
{
|
||||||
|
/* sinc with rolloff (dsf) */
|
||||||
|
float const rolloff = 1 + (float) setup->sharpness * (float) 0.032;
|
||||||
|
float const maxh = 32;
|
||||||
|
float const pow_a_n = (float) pow( rolloff, maxh );
|
||||||
|
float sum;
|
||||||
|
int i;
|
||||||
|
/* quadratic mapping to reduce negative (blurring) range */
|
||||||
|
float to_angle = (float) setup->resolution + 1;
|
||||||
|
to_angle = PI / maxh * (float) LUMA_CUTOFF * (to_angle * to_angle + 1);
|
||||||
|
|
||||||
|
kernels [kernel_size * 3 / 2] = maxh; /* default center value */
|
||||||
|
for ( i = 0; i < kernel_half * 2 + 1; i++ )
|
||||||
|
{
|
||||||
|
int x = i - kernel_half;
|
||||||
|
float angle = x * to_angle;
|
||||||
|
/* instability occurs at center point with rolloff very close to 1.0 */
|
||||||
|
if ( x || pow_a_n > (float) 1.056 || pow_a_n < (float) 0.981 )
|
||||||
|
{
|
||||||
|
float rolloff_cos_a = rolloff * (float) cos( angle );
|
||||||
|
float num = 1 - rolloff_cos_a -
|
||||||
|
pow_a_n * (float) cos( maxh * angle ) +
|
||||||
|
pow_a_n * rolloff * (float) cos( (maxh - 1) * angle );
|
||||||
|
float den = 1 - rolloff_cos_a - rolloff_cos_a + rolloff * rolloff;
|
||||||
|
float dsf = num / den;
|
||||||
|
kernels [kernel_size * 3 / 2 - kernel_half + i] = dsf - (float) 0.5;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* apply blackman window and find sum */
|
||||||
|
sum = 0;
|
||||||
|
for ( i = 0; i < kernel_half * 2 + 1; i++ )
|
||||||
|
{
|
||||||
|
float x = PI * 2 / (kernel_half * 2) * i;
|
||||||
|
float blackman = 0.42f - 0.5f * (float) cos( x ) + 0.08f * (float) cos( x * 2 );
|
||||||
|
sum += (kernels [kernel_size * 3 / 2 - kernel_half + i] *= blackman);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* normalize kernel */
|
||||||
|
sum = 1.0f / sum;
|
||||||
|
for ( i = 0; i < kernel_half * 2 + 1; i++ )
|
||||||
|
{
|
||||||
|
int x = kernel_size * 3 / 2 - kernel_half + i;
|
||||||
|
kernels [x] *= sum;
|
||||||
|
assert( kernels [x] == kernels [x] ); /* catch numerical instability */
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* generate chroma (iq) filter using gaussian kernel */
|
||||||
|
{
|
||||||
|
float const cutoff_factor = -0.03125f;
|
||||||
|
float cutoff = (float) setup->bleed;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
if ( cutoff < 0 )
|
||||||
|
{
|
||||||
|
/* keep extreme value accessible only near upper end of scale (1.0) */
|
||||||
|
cutoff *= cutoff;
|
||||||
|
cutoff *= cutoff;
|
||||||
|
cutoff *= cutoff;
|
||||||
|
cutoff *= -30.0f / 0.65f;
|
||||||
|
}
|
||||||
|
cutoff = cutoff_factor - 0.65f * cutoff_factor * cutoff;
|
||||||
|
|
||||||
|
for ( i = -kernel_half; i <= kernel_half; i++ )
|
||||||
|
kernels [kernel_size / 2 + i] = (float) exp( i * i * cutoff );
|
||||||
|
|
||||||
|
/* normalize even and odd phases separately */
|
||||||
|
for ( i = 0; i < 2; i++ )
|
||||||
|
{
|
||||||
|
float sum = 0;
|
||||||
|
int x;
|
||||||
|
for ( x = i; x < kernel_size; x += 2 )
|
||||||
|
sum += kernels [x];
|
||||||
|
|
||||||
|
sum = 1.0f / sum;
|
||||||
|
for ( x = i; x < kernel_size; x += 2 )
|
||||||
|
{
|
||||||
|
kernels [x] *= sum;
|
||||||
|
assert( kernels [x] == kernels [x] ); /* catch numerical instability */
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
printf( "luma:\n" );
|
||||||
|
for ( i = kernel_size; i < kernel_size * 2; i++ )
|
||||||
|
printf( "%f\n", kernels [i] );
|
||||||
|
printf( "chroma:\n" );
|
||||||
|
for ( i = 0; i < kernel_size; i++ )
|
||||||
|
printf( "%f\n", kernels [i] );
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* generate linear rescale kernels */
|
||||||
|
#if rescale_out > 1
|
||||||
|
{
|
||||||
|
float weight = 1.0f;
|
||||||
|
float* out = impl->kernel;
|
||||||
|
int n = rescale_out;
|
||||||
|
do
|
||||||
|
{
|
||||||
|
float remain = 0;
|
||||||
|
int i;
|
||||||
|
weight -= 1.0f / rescale_in;
|
||||||
|
for ( i = 0; i < kernel_size * 2; i++ )
|
||||||
|
{
|
||||||
|
float cur = kernels [i];
|
||||||
|
float m = cur * weight;
|
||||||
|
*out++ = m + remain;
|
||||||
|
remain = cur - m;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
while ( --n );
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
static float const default_decoder [6] =
|
||||||
|
{ 0.956f, 0.621f, -0.272f, -0.647f, -1.105f, 1.702f };
|
||||||
|
|
||||||
|
static void init( init_t* impl, snes_ntsc_setup_t const* setup )
|
||||||
|
{
|
||||||
|
impl->brightness = (float) setup->brightness * (0.5f * rgb_unit) + rgb_offset;
|
||||||
|
impl->contrast = (float) setup->contrast * (0.5f * rgb_unit) + rgb_unit;
|
||||||
|
#ifdef default_palette_contrast
|
||||||
|
if ( !setup->palette )
|
||||||
|
impl->contrast *= default_palette_contrast;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
impl->artifacts = (float) setup->artifacts;
|
||||||
|
if ( impl->artifacts > 0 )
|
||||||
|
impl->artifacts *= artifacts_max - artifacts_mid;
|
||||||
|
impl->artifacts = impl->artifacts * artifacts_mid + artifacts_mid;
|
||||||
|
|
||||||
|
impl->fringing = (float) setup->fringing;
|
||||||
|
if ( impl->fringing > 0 )
|
||||||
|
impl->fringing *= fringing_max - fringing_mid;
|
||||||
|
impl->fringing = impl->fringing * fringing_mid + fringing_mid;
|
||||||
|
|
||||||
|
init_filters( impl, setup );
|
||||||
|
|
||||||
|
/* generate gamma table */
|
||||||
|
if ( gamma_size > 1 )
|
||||||
|
{
|
||||||
|
float const to_float = 1.0f / (gamma_size - (gamma_size > 1));
|
||||||
|
float const gamma = 1.1333f - (float) setup->gamma * 0.5f;
|
||||||
|
/* match common PC's 2.2 gamma to TV's 2.65 gamma */
|
||||||
|
int i;
|
||||||
|
for ( i = 0; i < gamma_size; i++ )
|
||||||
|
impl->to_float [i] =
|
||||||
|
(float) pow( i * to_float, gamma ) * impl->contrast + impl->brightness;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* setup decoder matricies */
|
||||||
|
{
|
||||||
|
float hue = (float) setup->hue * PI + PI / 180 * ext_decoder_hue;
|
||||||
|
float sat = (float) setup->saturation + 1;
|
||||||
|
float const* decoder = setup->decoder_matrix;
|
||||||
|
if ( !decoder )
|
||||||
|
{
|
||||||
|
decoder = default_decoder;
|
||||||
|
if ( STD_HUE_CONDITION( setup ) )
|
||||||
|
hue += PI / 180 * (std_decoder_hue - ext_decoder_hue);
|
||||||
|
}
|
||||||
|
|
||||||
|
{
|
||||||
|
float s = (float) sin( hue ) * sat;
|
||||||
|
float c = (float) cos( hue ) * sat;
|
||||||
|
float* out = impl->to_rgb;
|
||||||
|
int n;
|
||||||
|
|
||||||
|
n = burst_count;
|
||||||
|
do
|
||||||
|
{
|
||||||
|
float const* in = decoder;
|
||||||
|
int n = 3;
|
||||||
|
do
|
||||||
|
{
|
||||||
|
float i = *in++;
|
||||||
|
float q = *in++;
|
||||||
|
*out++ = i * c - q * s;
|
||||||
|
*out++ = i * s + q * c;
|
||||||
|
}
|
||||||
|
while ( --n );
|
||||||
|
if ( burst_count <= 1 )
|
||||||
|
break;
|
||||||
|
ROTATE_IQ( s, c, 0.866025f, -0.5f ); /* +120 degrees */
|
||||||
|
}
|
||||||
|
while ( --n );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* kernel generation */
|
||||||
|
|
||||||
|
#define RGB_TO_YIQ( r, g, b, y, i ) (\
|
||||||
|
(y = (r) * 0.299f + (g) * 0.587f + (b) * 0.114f),\
|
||||||
|
(i = (r) * 0.596f - (g) * 0.275f - (b) * 0.321f),\
|
||||||
|
((r) * 0.212f - (g) * 0.523f + (b) * 0.311f)\
|
||||||
|
)
|
||||||
|
|
||||||
|
#define YIQ_TO_RGB( y, i, q, to_rgb, type, r, g ) (\
|
||||||
|
r = (type) (y + to_rgb [0] * i + to_rgb [1] * q),\
|
||||||
|
g = (type) (y + to_rgb [2] * i + to_rgb [3] * q),\
|
||||||
|
(type) (y + to_rgb [4] * i + to_rgb [5] * q)\
|
||||||
|
)
|
||||||
|
|
||||||
|
#define PACK_RGB( r, g, b ) ((r) << 21 | (g) << 11 | (b) << 1)
|
||||||
|
|
||||||
|
enum { rgb_kernel_size = burst_size / alignment_count };
|
||||||
|
enum { rgb_bias = rgb_unit * 2 * snes_ntsc_rgb_builder };
|
||||||
|
|
||||||
|
typedef struct pixel_info_t
|
||||||
|
{
|
||||||
|
int offset;
|
||||||
|
float negate;
|
||||||
|
float kernel [4];
|
||||||
|
} pixel_info_t;
|
||||||
|
|
||||||
|
#if rescale_in > 1
|
||||||
|
#define PIXEL_OFFSET_( ntsc, scaled ) \
|
||||||
|
(kernel_size / 2 + ntsc + (scaled != 0) + (rescale_out - scaled) % rescale_out + \
|
||||||
|
(kernel_size * 2 * scaled))
|
||||||
|
|
||||||
|
#define PIXEL_OFFSET( ntsc, scaled ) \
|
||||||
|
PIXEL_OFFSET_( ((ntsc) - (scaled) / rescale_out * rescale_in),\
|
||||||
|
(((scaled) + rescale_out * 10) % rescale_out) ),\
|
||||||
|
(1.0f - (((ntsc) + 100) & 2))
|
||||||
|
#else
|
||||||
|
#define PIXEL_OFFSET( ntsc, scaled ) \
|
||||||
|
(kernel_size / 2 + (ntsc) - (scaled)),\
|
||||||
|
(1.0f - (((ntsc) + 100) & 2))
|
||||||
|
#endif
|
||||||
|
|
||||||
|
extern pixel_info_t const snes_ntsc_pixels [alignment_count];
|
||||||
|
|
||||||
|
/* Generate pixel at all burst phases and column alignments */
|
||||||
|
static void gen_kernel( init_t* impl, float y, float i, float q, snes_ntsc_rgb_t* out )
|
||||||
|
{
|
||||||
|
/* generate for each scanline burst phase */
|
||||||
|
float const* to_rgb = impl->to_rgb;
|
||||||
|
int burst_remain = burst_count;
|
||||||
|
y -= rgb_offset;
|
||||||
|
do
|
||||||
|
{
|
||||||
|
/* Encode yiq into *two* composite signals (to allow control over artifacting).
|
||||||
|
Convolve these with kernels which: filter respective components, apply
|
||||||
|
sharpening, and rescale horizontally. Convert resulting yiq to rgb and pack
|
||||||
|
into integer. Based on algorithm by NewRisingSun. */
|
||||||
|
pixel_info_t const* pixel = snes_ntsc_pixels;
|
||||||
|
int alignment_remain = alignment_count;
|
||||||
|
do
|
||||||
|
{
|
||||||
|
/* negate is -1 when composite starts at odd multiple of 2 */
|
||||||
|
float const yy = y * impl->fringing * pixel->negate;
|
||||||
|
float const ic0 = (i + yy) * pixel->kernel [0];
|
||||||
|
float const qc1 = (q + yy) * pixel->kernel [1];
|
||||||
|
float const ic2 = (i - yy) * pixel->kernel [2];
|
||||||
|
float const qc3 = (q - yy) * pixel->kernel [3];
|
||||||
|
|
||||||
|
float const factor = impl->artifacts * pixel->negate;
|
||||||
|
float const ii = i * factor;
|
||||||
|
float const yc0 = (y + ii) * pixel->kernel [0];
|
||||||
|
float const yc2 = (y - ii) * pixel->kernel [2];
|
||||||
|
|
||||||
|
float const qq = q * factor;
|
||||||
|
float const yc1 = (y + qq) * pixel->kernel [1];
|
||||||
|
float const yc3 = (y - qq) * pixel->kernel [3];
|
||||||
|
|
||||||
|
float const* k = &impl->kernel [pixel->offset];
|
||||||
|
int n;
|
||||||
|
++pixel;
|
||||||
|
for ( n = rgb_kernel_size; n; --n )
|
||||||
|
{
|
||||||
|
float i = k[0]*ic0 + k[2]*ic2;
|
||||||
|
float q = k[1]*qc1 + k[3]*qc3;
|
||||||
|
float y = k[kernel_size+0]*yc0 + k[kernel_size+1]*yc1 +
|
||||||
|
k[kernel_size+2]*yc2 + k[kernel_size+3]*yc3 + rgb_offset;
|
||||||
|
if ( rescale_out <= 1 )
|
||||||
|
k--;
|
||||||
|
else if ( k < &impl->kernel [kernel_size * 2 * (rescale_out - 1)] )
|
||||||
|
k += kernel_size * 2 - 1;
|
||||||
|
else
|
||||||
|
k -= kernel_size * 2 * (rescale_out - 1) + 2;
|
||||||
|
{
|
||||||
|
int r, g, b = YIQ_TO_RGB( y, i, q, to_rgb, int, r, g );
|
||||||
|
*out++ = PACK_RGB( r, g, b ) - rgb_bias;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
while ( alignment_count > 1 && --alignment_remain );
|
||||||
|
|
||||||
|
if ( burst_count <= 1 )
|
||||||
|
break;
|
||||||
|
|
||||||
|
to_rgb += 6;
|
||||||
|
|
||||||
|
ROTATE_IQ( i, q, -0.866025f, -0.5f ); /* -120 degrees */
|
||||||
|
}
|
||||||
|
while ( --burst_remain );
|
||||||
|
}
|
||||||
|
|
||||||
|
static void correct_errors( snes_ntsc_rgb_t color, snes_ntsc_rgb_t* out );
|
||||||
|
|
||||||
|
#if DISABLE_CORRECTION
|
||||||
|
#define CORRECT_ERROR( a ) { out [i] += rgb_bias; }
|
||||||
|
#define DISTRIBUTE_ERROR( a, b, c ) { out [i] += rgb_bias; }
|
||||||
|
#else
|
||||||
|
#define CORRECT_ERROR( a ) { out [a] += error; }
|
||||||
|
#define DISTRIBUTE_ERROR( a, b, c ) {\
|
||||||
|
snes_ntsc_rgb_t fourth = (error + 2 * snes_ntsc_rgb_builder) >> 2;\
|
||||||
|
fourth &= (rgb_bias >> 1) - snes_ntsc_rgb_builder;\
|
||||||
|
fourth -= rgb_bias >> 2;\
|
||||||
|
out [a] += fourth;\
|
||||||
|
out [b] += fourth;\
|
||||||
|
out [c] += fourth;\
|
||||||
|
out [i] += error - (fourth * 3);\
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define RGB_PALETTE_OUT( rgb, out_ )\
|
||||||
|
{\
|
||||||
|
unsigned char* out = (out_);\
|
||||||
|
snes_ntsc_rgb_t clamped = (rgb);\
|
||||||
|
SNES_NTSC_CLAMP_( clamped, (8 - rgb_bits) );\
|
||||||
|
out [0] = (unsigned char) (clamped >> 21);\
|
||||||
|
out [1] = (unsigned char) (clamped >> 11);\
|
||||||
|
out [2] = (unsigned char) (clamped >> 1);\
|
||||||
|
}
|
||||||
|
|
||||||
|
/* blitter related */
|
||||||
|
|
||||||
|
#ifndef restrict
|
||||||
|
#if defined (__GNUC__)
|
||||||
|
#define restrict __restrict__
|
||||||
|
#elif defined (_MSC_VER) && _MSC_VER > 1300
|
||||||
|
#define restrict __restrict
|
||||||
|
#else
|
||||||
|
/* no support for restricted pointers */
|
||||||
|
#define restrict
|
||||||
|
#endif
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#include <limits.h>
|
||||||
|
|
||||||
|
#if SNES_NTSC_OUT_DEPTH <= 16
|
||||||
|
#if USHRT_MAX == 0xFFFF
|
||||||
|
typedef unsigned short snes_ntsc_out_t;
|
||||||
|
#else
|
||||||
|
#error "Need 16-bit int type"
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#else
|
||||||
|
#if UINT_MAX == 0xFFFFFFFF
|
||||||
|
typedef unsigned int snes_ntsc_out_t;
|
||||||
|
#elif ULONG_MAX == 0xFFFFFFFF
|
||||||
|
typedef unsigned long snes_ntsc_out_t;
|
||||||
|
#else
|
||||||
|
#error "Need 32-bit int type"
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif
|
||||||
Loading…
Reference in New Issue
Block a user