252 lines
8.3 KiB
C++
252 lines
8.3 KiB
C++
#include "stdafx.h"
|
|
/* snes_ntsc 0.2.2. http://www.slack.net/~ant/ */
|
|
|
|
#include "snes_ntsc.h"
|
|
|
|
/* Copyright (C) 2006-2007 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 */
|
|
|
|
snes_ntsc_setup_t const snes_ntsc_monochrome = {0, -1, 0, 0, .2, 0, .2, -.2, -.2, -1, 1, 0, 0};
|
|
snes_ntsc_setup_t const snes_ntsc_composite = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0};
|
|
snes_ntsc_setup_t const snes_ntsc_svideo = {0, 0, 0, 0, .2, 0, .2, -1, -1, 0, 1, 0, 0};
|
|
snes_ntsc_setup_t const snes_ntsc_rgb = {0, 0, 0, 0, .2, 0, .7, -1, -1, -1, 1, 0, 0};
|
|
|
|
#define alignment_count 3
|
|
#define burst_count 3
|
|
#define rescale_in 8
|
|
#define rescale_out 7
|
|
|
|
#define artifacts_mid 1.0f
|
|
#define fringing_mid 1.0f
|
|
#define std_decoder_hue 0
|
|
|
|
#define rgb_bits 7 /* half normal range to allow for doubled hires pixels */
|
|
#define gamma_size 32
|
|
|
|
#include "snes_ntsc_impl.h"
|
|
|
|
/* 3 input pixels -> 8 composite samples */
|
|
pixel_info_t const snes_ntsc_pixels[alignment_count] = {
|
|
{PIXEL_OFFSET(-4, -9), {1, 1, .6667f, 0}},
|
|
{PIXEL_OFFSET(-2, -7), {.3333f, 1, 1, .3333f}},
|
|
{PIXEL_OFFSET(0, -5), {0, .6667f, 1, 1}},
|
|
};
|
|
|
|
static void merge_kernel_fields(snes_ntsc_rgb_t* io)
|
|
{
|
|
int n;
|
|
for (n = burst_size; n; --n)
|
|
{
|
|
snes_ntsc_rgb_t p0 = io[burst_size * 0] + rgb_bias;
|
|
snes_ntsc_rgb_t p1 = io[burst_size * 1] + rgb_bias;
|
|
snes_ntsc_rgb_t p2 = io[burst_size * 2] + rgb_bias;
|
|
/* merge colors without losing precision */
|
|
io[burst_size * 0] =
|
|
((p0 + p1 - ((p0 ^ p1) & snes_ntsc_rgb_builder)) >> 1) - rgb_bias;
|
|
io[burst_size * 1] =
|
|
((p1 + p2 - ((p1 ^ p2) & snes_ntsc_rgb_builder)) >> 1) - rgb_bias;
|
|
io[burst_size * 2] =
|
|
((p2 + p0 - ((p2 ^ p0) & snes_ntsc_rgb_builder)) >> 1) - rgb_bias;
|
|
++io;
|
|
}
|
|
}
|
|
|
|
static void correct_errors(snes_ntsc_rgb_t color, snes_ntsc_rgb_t* out)
|
|
{
|
|
int n;
|
|
for (n = burst_count; n; --n)
|
|
{
|
|
unsigned i;
|
|
for (i = 0; i < rgb_kernel_size / 2; i++)
|
|
{
|
|
snes_ntsc_rgb_t error = color -
|
|
out[i] - out[(i + 12) % 14 + 14] - out[(i + 10) % 14 + 28] -
|
|
out[i + 7] - out[i + 5 + 14] - out[i + 3 + 28];
|
|
DISTRIBUTE_ERROR(i+3+28, i+5+14, i+7);
|
|
}
|
|
out += alignment_count * rgb_kernel_size;
|
|
}
|
|
}
|
|
|
|
void snes_ntsc_init(snes_ntsc_t* ntsc, snes_ntsc_setup_t const* setup)
|
|
{
|
|
int merge_fields;
|
|
int entry;
|
|
init_t impl;
|
|
if (!setup)
|
|
setup = &snes_ntsc_composite;
|
|
init(&impl, setup);
|
|
|
|
merge_fields = setup->merge_fields;
|
|
if (setup->artifacts <= -1 && setup->fringing <= -1)
|
|
merge_fields = 1;
|
|
|
|
for (entry = 0; entry < snes_ntsc_palette_size; entry++)
|
|
{
|
|
/* Reduce number of significant bits of source color. Clearing the
|
|
low bits of R and B were least notictable. Modifying green was too
|
|
noticeable. */
|
|
int ir = entry >> 8 & 0x1E;
|
|
int ig = entry >> 4 & 0x1F;
|
|
int ib = entry << 1 & 0x1E;
|
|
|
|
#if SNES_NTSC_BSNES_COLORTBL
|
|
if ( setup->bsnes_colortbl )
|
|
{
|
|
int bgr15 = (ib << 10) | (ig << 5) | ir;
|
|
unsigned long rgb16 = setup->bsnes_colortbl [bgr15];
|
|
ir = rgb16 >> 11 & 0x1E;
|
|
ig = rgb16 >> 6 & 0x1F;
|
|
ib = rgb16 & 0x1E;
|
|
}
|
|
#endif
|
|
|
|
{
|
|
float rr = impl.to_float[ir];
|
|
float gg = impl.to_float[ig];
|
|
float bb = impl.to_float[ib];
|
|
|
|
float y, i, q = RGB_TO_YIQ(rr, gg, bb, y, i);
|
|
|
|
int r, g, b = YIQ_TO_RGB(y, i, q, impl.to_rgb, int, r, g);
|
|
snes_ntsc_rgb_t rgb = PACK_RGB(r, g, b);
|
|
|
|
snes_ntsc_rgb_t* out = ntsc->table[entry];
|
|
gen_kernel(&impl, y, i, q, out);
|
|
if (merge_fields)
|
|
merge_kernel_fields(out);
|
|
correct_errors(rgb, out);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef SNES_NTSC_NO_BLITTERS
|
|
|
|
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)
|
|
{
|
|
int chunk_count = (in_width - 1) / snes_ntsc_in_chunk;
|
|
for (; in_height; --in_height)
|
|
{
|
|
SNES_NTSC_IN_T const* line_in = input;
|
|
SNES_NTSC_BEGIN_ROW(ntsc, burst_phase,
|
|
snes_ntsc_black, snes_ntsc_black, SNES_NTSC_ADJ_IN( *line_in ));
|
|
snes_ntsc_out_t* restrict line_out = (snes_ntsc_out_t*)rgb_out;
|
|
int n;
|
|
++line_in;
|
|
|
|
for (n = chunk_count; n; --n)
|
|
{
|
|
/* order of input and output pixels must not be altered */
|
|
SNES_NTSC_COLOR_IN(0, SNES_NTSC_ADJ_IN( line_in [0] ));
|
|
SNES_NTSC_RGB_OUT(0, line_out [0], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_RGB_OUT(1, line_out [1], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(1, SNES_NTSC_ADJ_IN( line_in [1] ));
|
|
SNES_NTSC_RGB_OUT(2, line_out [2], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_RGB_OUT(3, line_out [3], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(2, SNES_NTSC_ADJ_IN( line_in [2] ));
|
|
SNES_NTSC_RGB_OUT(4, line_out [4], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_RGB_OUT(5, line_out [5], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_RGB_OUT(6, line_out [6], SNES_NTSC_OUT_DEPTH);
|
|
|
|
line_in += 3;
|
|
line_out += 7;
|
|
}
|
|
|
|
/* finish final pixels */
|
|
SNES_NTSC_COLOR_IN(0, snes_ntsc_black);
|
|
SNES_NTSC_RGB_OUT(0, line_out [0], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_RGB_OUT(1, line_out [1], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(1, snes_ntsc_black);
|
|
SNES_NTSC_RGB_OUT(2, line_out [2], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_RGB_OUT(3, line_out [3], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(2, snes_ntsc_black);
|
|
SNES_NTSC_RGB_OUT(4, line_out [4], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_RGB_OUT(5, line_out [5], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_RGB_OUT(6, line_out [6], SNES_NTSC_OUT_DEPTH);
|
|
|
|
burst_phase = (burst_phase + 1) % snes_ntsc_burst_count;
|
|
input += in_row_width;
|
|
rgb_out = (char*)rgb_out + 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)
|
|
{
|
|
int chunk_count = (in_width - 2) / (snes_ntsc_in_chunk * 2);
|
|
for (; in_height; --in_height)
|
|
{
|
|
SNES_NTSC_IN_T const* line_in = input;
|
|
SNES_NTSC_HIRES_ROW(ntsc, burst_phase,
|
|
snes_ntsc_black, snes_ntsc_black, snes_ntsc_black,
|
|
SNES_NTSC_ADJ_IN( line_in [0] ),
|
|
SNES_NTSC_ADJ_IN( line_in [1] ));
|
|
snes_ntsc_out_t* restrict line_out = (snes_ntsc_out_t*)rgb_out;
|
|
int n;
|
|
line_in += 2;
|
|
|
|
for (n = chunk_count; n; --n)
|
|
{
|
|
/* twice as many input pixels per chunk */
|
|
SNES_NTSC_COLOR_IN(0, SNES_NTSC_ADJ_IN( line_in [0] ));
|
|
SNES_NTSC_HIRES_OUT(0, line_out [0], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(1, SNES_NTSC_ADJ_IN( line_in [1] ));
|
|
SNES_NTSC_HIRES_OUT(1, line_out [1], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(2, SNES_NTSC_ADJ_IN( line_in [2] ));
|
|
SNES_NTSC_HIRES_OUT(2, line_out [2], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(3, SNES_NTSC_ADJ_IN( line_in [3] ));
|
|
SNES_NTSC_HIRES_OUT(3, line_out [3], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(4, SNES_NTSC_ADJ_IN( line_in [4] ));
|
|
SNES_NTSC_HIRES_OUT(4, line_out [4], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(5, SNES_NTSC_ADJ_IN( line_in [5] ));
|
|
SNES_NTSC_HIRES_OUT(5, line_out [5], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_HIRES_OUT(6, line_out [6], SNES_NTSC_OUT_DEPTH);
|
|
|
|
line_in += 6;
|
|
line_out += 7;
|
|
}
|
|
|
|
SNES_NTSC_COLOR_IN(0, snes_ntsc_black);
|
|
SNES_NTSC_HIRES_OUT(0, line_out [0], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(1, snes_ntsc_black);
|
|
SNES_NTSC_HIRES_OUT(1, line_out [1], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(2, snes_ntsc_black);
|
|
SNES_NTSC_HIRES_OUT(2, line_out [2], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(3, snes_ntsc_black);
|
|
SNES_NTSC_HIRES_OUT(3, line_out [3], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(4, snes_ntsc_black);
|
|
SNES_NTSC_HIRES_OUT(4, line_out [4], SNES_NTSC_OUT_DEPTH);
|
|
|
|
SNES_NTSC_COLOR_IN(5, snes_ntsc_black);
|
|
SNES_NTSC_HIRES_OUT(5, line_out [5], SNES_NTSC_OUT_DEPTH);
|
|
SNES_NTSC_HIRES_OUT(6, line_out [6], SNES_NTSC_OUT_DEPTH);
|
|
|
|
burst_phase = (burst_phase + 1) % snes_ntsc_burst_count;
|
|
input += in_row_width;
|
|
rgb_out = (char*)rgb_out + out_pitch;
|
|
}
|
|
}
|
|
|
|
#endif
|