/* sms_ntsc 0.2.3. http://www.slack.net/~ant/ */ #include "shared.h" #include "sms_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 */ sms_ntsc_setup_t const sms_ntsc_monochrome = { 0,-1, 0, 0,.2, 0, .2,-.2,-.2,-1, 0, 0 }; sms_ntsc_setup_t const sms_ntsc_composite = { 0, 0, 0, 0, 0, 0,.25, 0, 0, 0, 0, 0 }; sms_ntsc_setup_t const sms_ntsc_svideo = { 0, 0, 0, 0, 0, 0,.25, -1, -1, 0, 0, 0 }; sms_ntsc_setup_t const sms_ntsc_rgb = { 0, 0, 0, 0,.2, 0,.70, -1, -1,-1, 0, 0 }; #define alignment_count 3 #define burst_count 1 #define rescale_in 8 #define rescale_out 7 #define artifacts_mid 0.4f #define artifacts_max 1.2f #define fringing_mid 0.8f #define std_decoder_hue 0 #define gamma_size 16 #include "sms_ntsc_impl.h" /* 3 input pixels -> 8 composite samples */ pixel_info_t const sms_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 correct_errors( sms_ntsc_rgb_t color, sms_ntsc_rgb_t* out ) { unsigned i; for ( i = 0; i < rgb_kernel_size / 2; i++ ) { sms_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]; CORRECT_ERROR( i + 3 + 28 ); } } void sms_ntsc_init( sms_ntsc_t* ntsc, sms_ntsc_setup_t const* setup ) { int entry; init_t impl; if ( !setup ) setup = &sms_ntsc_composite; init( &impl, setup ); for ( entry = 0; entry < sms_ntsc_palette_size; entry++ ) { float bb = impl.to_float [entry >> 8 & 0x0F]; float gg = impl.to_float [entry >> 4 & 0x0F]; float rr = impl.to_float [entry & 0x0F]; 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 ); sms_ntsc_rgb_t rgb = PACK_RGB( r, g, b ); if ( setup->palette_out ) RGB_PALETTE_OUT( rgb, &setup->palette_out [entry * 3] ); if ( ntsc ) { gen_kernel( &impl, y, i, q, ntsc->table [entry] ); correct_errors( rgb, ntsc->table [entry] ); } } } #ifndef SMS_NTSC_NO_BLITTERS /* modified blitters to work on a line basis with genesis plus renderer*/ void sms_ntsc_blit( sms_ntsc_t const* ntsc, SMS_NTSC_IN_T const* table, unsigned char* input, int in_width, int vline) { int const chunk_count = in_width / sms_ntsc_in_chunk; /* handle extra 0, 1, or 2 pixels by placing them at beginning of row */ int const in_extra = in_width - chunk_count * sms_ntsc_in_chunk; unsigned const extra2 = (unsigned) -(in_extra >> 1 & 1); /* (unsigned) -1 = ~0 */ unsigned const extra1 = (unsigned) -(in_extra & 1) | extra2; SMS_NTSC_BEGIN_ROW( ntsc, sms_ntsc_black, (SMS_NTSC_ADJ_IN( table[input[0]] )) & extra2, (SMS_NTSC_ADJ_IN( table[input[extra2 & 1]] )) & extra1 ); #ifdef NGC /* directly fill the RGB565 texture */ /* one tile is 32 byte = 4x4 pixels */ /* tiles are stored continuously in texture memory */ in_width = SMS_NTSC_OUT_WIDTH(in_width) >> 2; int offset = ((in_width << 5) * (vline >> 2)) + ((vline & 3) * 8); sms_ntsc_out_t* restrict line_out = (sms_ntsc_out_t*)(texturemem + offset); offset = 0; #else sms_ntsc_out_t* restrict line_out = (sms_ntsc_out_t*)(&bitmap.data[(vline * bitmap.pitch)]); #endif int n; input += in_extra; for ( n = chunk_count; n; --n ) { /* order of input and output pixels must not be altered */ SMS_NTSC_COLOR_IN( 0, ntsc, SMS_NTSC_ADJ_IN( table[*input++] ) ); #ifdef NGC SMS_NTSC_RGB_OUT( 0, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; SMS_NTSC_RGB_OUT( 1, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; #else SMS_NTSC_RGB_OUT( 0, *line_out++, SMS_NTSC_OUT_DEPTH ); SMS_NTSC_RGB_OUT( 1, *line_out++, SMS_NTSC_OUT_DEPTH ); #endif SMS_NTSC_COLOR_IN( 1, ntsc, SMS_NTSC_ADJ_IN( table[*input++] ) ); #ifdef NGC SMS_NTSC_RGB_OUT( 2, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; SMS_NTSC_RGB_OUT( 3, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; #else SMS_NTSC_RGB_OUT( 2, *line_out++, SMS_NTSC_OUT_DEPTH ); SMS_NTSC_RGB_OUT( 3, *line_out++, SMS_NTSC_OUT_DEPTH ); #endif SMS_NTSC_COLOR_IN( 2, ntsc, SMS_NTSC_ADJ_IN( table[*input++] ) ); #ifdef NGC SMS_NTSC_RGB_OUT( 4, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; SMS_NTSC_RGB_OUT( 5, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; SMS_NTSC_RGB_OUT( 6, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; #else SMS_NTSC_RGB_OUT( 4, *line_out++, SMS_NTSC_OUT_DEPTH ); SMS_NTSC_RGB_OUT( 5, *line_out++, SMS_NTSC_OUT_DEPTH ); SMS_NTSC_RGB_OUT( 6, *line_out++, SMS_NTSC_OUT_DEPTH ); #endif } /* finish final pixels */ SMS_NTSC_COLOR_IN( 0, ntsc, sms_ntsc_black ); #ifdef NGC SMS_NTSC_RGB_OUT( 0, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; SMS_NTSC_RGB_OUT( 1, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; #else SMS_NTSC_RGB_OUT( 0, *line_out++, SMS_NTSC_OUT_DEPTH ); SMS_NTSC_RGB_OUT( 1, *line_out++, SMS_NTSC_OUT_DEPTH ); #endif SMS_NTSC_COLOR_IN( 1, ntsc, sms_ntsc_black ); #ifdef NGC SMS_NTSC_RGB_OUT( 2, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; SMS_NTSC_RGB_OUT( 3, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; #else SMS_NTSC_RGB_OUT( 2, *line_out++, SMS_NTSC_OUT_DEPTH ); SMS_NTSC_RGB_OUT( 3, *line_out++, SMS_NTSC_OUT_DEPTH ); #endif SMS_NTSC_COLOR_IN( 2, ntsc, sms_ntsc_black ); #ifdef NGC SMS_NTSC_RGB_OUT( 4, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; SMS_NTSC_RGB_OUT( 5, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); offset ++; SMS_NTSC_RGB_OUT( 6, line_out[16*(offset/4) + (offset%4)], SMS_NTSC_OUT_DEPTH ); #else SMS_NTSC_RGB_OUT( 4, *line_out++, SMS_NTSC_OUT_DEPTH ); SMS_NTSC_RGB_OUT( 5, *line_out++, SMS_NTSC_OUT_DEPTH ); SMS_NTSC_RGB_OUT( 6, *line_out++, SMS_NTSC_OUT_DEPTH ); #endif } #endif