mirror of
https://github.com/libretro/snes9x.git
synced 2024-11-27 18:40:39 +00:00
391 lines
12 KiB
C
391 lines
12 KiB
C
/* 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"
|
|
|
|
unsigned int snes_ntsc_scanline_offset = 0;
|
|
unsigned short snes_ntsc_scanline_mask = 0xffff;
|
|
|
|
/* 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;
|
|
}
|
|
}
|
|
|
|
/* 12.5% scanlines like in snes_ntsc example instead of zsnes's 25% */
|
|
#define PIXEL_OUT( x ) \
|
|
SNES_NTSC_RGB_OUT( x, value, SNES_NTSC_OUT_DEPTH ); \
|
|
line_outa[x] = value; \
|
|
line_outb[x] = value - (value >> snes_ntsc_scanline_offset & snes_ntsc_scanline_mask);
|
|
|
|
void snes_ntsc_blit_scanlines( 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 )
|
|
{
|
|
unsigned value;
|
|
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_outa = (snes_ntsc_out_t *) rgb_out;
|
|
snes_ntsc_out_t * restrict line_outb = (snes_ntsc_out_t *) ((char *) line_outa + out_pitch);
|
|
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] ) );
|
|
PIXEL_OUT (0);
|
|
PIXEL_OUT (1);
|
|
|
|
SNES_NTSC_COLOR_IN( 1, SNES_NTSC_ADJ_IN( line_in [1] ) );
|
|
PIXEL_OUT (2);
|
|
PIXEL_OUT (3);
|
|
|
|
SNES_NTSC_COLOR_IN( 2, SNES_NTSC_ADJ_IN( line_in [2] ) );
|
|
PIXEL_OUT (4);
|
|
PIXEL_OUT (5);
|
|
PIXEL_OUT (6);
|
|
|
|
line_in += 3;
|
|
line_outa += 7;
|
|
line_outb += 7;
|
|
}
|
|
|
|
/* finish final pixels */
|
|
SNES_NTSC_COLOR_IN( 0, snes_ntsc_black );
|
|
PIXEL_OUT (0);
|
|
PIXEL_OUT (1);
|
|
|
|
SNES_NTSC_COLOR_IN( 1, snes_ntsc_black );
|
|
PIXEL_OUT (2);
|
|
PIXEL_OUT (3);
|
|
|
|
SNES_NTSC_COLOR_IN( 2, snes_ntsc_black );
|
|
PIXEL_OUT (4);
|
|
PIXEL_OUT (5);
|
|
PIXEL_OUT (6);
|
|
|
|
burst_phase = (burst_phase + 1) % snes_ntsc_burst_count;
|
|
input += in_row_width;
|
|
rgb_out = (char*) rgb_out + 2 * out_pitch;
|
|
}
|
|
}
|
|
|
|
#define PIXEL_OUT_HIRES( x ) \
|
|
SNES_NTSC_HIRES_OUT( x, value, SNES_NTSC_OUT_DEPTH ); \
|
|
line_outa[x] = value; \
|
|
line_outb[x] = value - (value >> snes_ntsc_scanline_offset & snes_ntsc_scanline_mask);
|
|
|
|
void snes_ntsc_blit_hires_scanlines( 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);
|
|
unsigned value;
|
|
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_outa = (snes_ntsc_out_t*) rgb_out;
|
|
snes_ntsc_out_t* restrict line_outb = (snes_ntsc_out_t*) ((char *) line_outa + out_pitch);
|
|
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] ) );
|
|
PIXEL_OUT_HIRES (0);
|
|
|
|
SNES_NTSC_COLOR_IN( 1, SNES_NTSC_ADJ_IN( line_in [1] ) );
|
|
PIXEL_OUT_HIRES (1);
|
|
|
|
SNES_NTSC_COLOR_IN( 2, SNES_NTSC_ADJ_IN( line_in [2] ) );
|
|
PIXEL_OUT_HIRES (2);
|
|
|
|
SNES_NTSC_COLOR_IN( 3, SNES_NTSC_ADJ_IN( line_in [3] ) );
|
|
PIXEL_OUT_HIRES (3);
|
|
|
|
SNES_NTSC_COLOR_IN( 4, SNES_NTSC_ADJ_IN( line_in [4] ) );
|
|
PIXEL_OUT_HIRES (4);
|
|
|
|
SNES_NTSC_COLOR_IN( 5, SNES_NTSC_ADJ_IN( line_in [5] ) );
|
|
PIXEL_OUT_HIRES (5);
|
|
PIXEL_OUT_HIRES (6);
|
|
|
|
line_in += 6;
|
|
line_outa += 7;
|
|
line_outb += 7;
|
|
}
|
|
|
|
SNES_NTSC_COLOR_IN( 0, snes_ntsc_black );
|
|
PIXEL_OUT_HIRES (0);
|
|
|
|
SNES_NTSC_COLOR_IN( 1, snes_ntsc_black );
|
|
PIXEL_OUT_HIRES (1);
|
|
|
|
SNES_NTSC_COLOR_IN( 2, snes_ntsc_black );
|
|
PIXEL_OUT_HIRES (2);
|
|
|
|
SNES_NTSC_COLOR_IN( 3, snes_ntsc_black );
|
|
PIXEL_OUT_HIRES (3);
|
|
|
|
SNES_NTSC_COLOR_IN( 4, snes_ntsc_black );
|
|
PIXEL_OUT_HIRES (4);
|
|
|
|
SNES_NTSC_COLOR_IN( 5, snes_ntsc_black );
|
|
PIXEL_OUT_HIRES (5);
|
|
PIXEL_OUT_HIRES (6);
|
|
|
|
burst_phase = (burst_phase + 1) % snes_ntsc_burst_count;
|
|
input += in_row_width;
|
|
rgb_out = (char*) rgb_out + out_pitch * 2;
|
|
}
|
|
}
|
|
|
|
#endif
|