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Diffstat (limited to 'libvo/gtf.c')
| -rw-r--r-- | libvo/gtf.c | 304 |
1 files changed, 0 insertions, 304 deletions
diff --git a/libvo/gtf.c b/libvo/gtf.c deleted file mode 100644 index 6dd64a57c8..0000000000 --- a/libvo/gtf.c +++ /dev/null @@ -1,304 +0,0 @@ -/* - * GTF calculations formulas are taken from GTF_V1R1.xls - * created by ANDY.MORRISH@NSC.COM - * - * copyright (C) 2002 Rudolf Marek <r.marek@assembler.cz> - * - * This file is part of MPlayer. - * - * MPlayer is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * MPlayer 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with MPlayer; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -//Version 0.4 -#include "config.h" -#include <stdio.h> -#include <stdlib.h> -#include <math.h> -#include "gtf.h" - -#undef GTF_DEBUG - -#ifdef GTF_DEBUG -#define DEBUG_PRINTF(a,b) printf(a,b); -#else -#define DEBUG_PRINTF(a,b) -#endif - -static GTF_constants GTF_given_constants = { 3.0,550.0,1,8,1.8,8,40,20,128,600 }; - -static void GetRoundedConstants(GTF_constants *c) - { - c->Vsync_need = round(GTF_given_constants.Vsync_need); - c->min_Vsync_BP = GTF_given_constants.min_Vsync_BP; - c->min_front_porch = round(GTF_given_constants.min_front_porch); - c->char_cell_granularity = GTF_given_constants.char_cell_granularity; - c->margin_width = GTF_given_constants.margin_width; - c->sync_width = GTF_given_constants.sync_width; - c->c = ((GTF_given_constants.c - GTF_given_constants.j)*(GTF_given_constants.k / 256)) + GTF_given_constants.j; - c->j = GTF_given_constants.j; - c->k = GTF_given_constants.k; - c->m = (GTF_given_constants.k / 256) * GTF_given_constants.m; - } - -void GTF_calcTimings(double X,double Y,double freq, int type, - int want_margins, int want_interlace,struct VesaCRTCInfoBlock *result ) -{ - GTF_constants c; - double RR, margin_top, margin_bottom, margin_left, margin_right; - double estimated_H_period,sync_plus_BP,BP,interlace,V_total_lines_field; - double estimated_V_field_rate,actual_H_period,actual_V_field_freq; - double total_active_pixels, ideal_duty_cycle, blanking_time, H_total_pixels; - double H_freq, pixel_freq,actual_V_frame_freq; - double H_sync_start, H_sync_end, H_back_porch, H_front_porch, H_sync_width; - double V_back_porch, V_front_porch, V_sync_start, V_sync_end,V_sync_width; - double ideal_H_period; - GetRoundedConstants(&c); - - - pixel_freq = RR = freq; - - /* DETERMINE IF 1/2 LINE INTERLACE IS PRESENT */ - - interlace = 0; - - if (want_interlace) { - RR = RR * 2; - Y=Y/2; - interlace = 0.5; - } - - result->Flags = 0; - - if ((Y==300)||(Y==200)||(Y==240)) - { - Y*=2; - result->Flags = VESA_CRTC_DOUBLESCAN; /* TODO: check if mode support */ - } - - /* DETERMINE NUMBER OF LINES IN V MARGIN */ - /* DETERMINE NUMBER OF PIXELS IN H MARGIN [pixels] */ - - margin_left = margin_right = 0; - margin_top = margin_bottom = 0; - - if (want_margins) { - margin_top = margin_bottom = (c.margin_width / 100) * Y; - margin_left = round(( X* c.margin_width/100)/c.char_cell_granularity) \ - * c.char_cell_granularity; - margin_right = margin_left; - DEBUG_PRINTF("margin_left_right : %f\n",margin_right) - DEBUG_PRINTF("margin_top_bottom : %f\n",margin_top) - } - - /* FIND TOTAL NUMBER OF ACTIVE PIXELS (IMAGE + MARGIN) [pixels] */ - - total_active_pixels = margin_left + margin_right + X; - DEBUG_PRINTF("total_active_pixels: %f\n",total_active_pixels) - - if (type == GTF_PF) - { - ideal_H_period = ((c.c-100)+(sqrt(((100-c.c)*(100-c.c) )+(0.4*c.m*(total_active_pixels + margin_left + margin_right) / freq))))/2/c.m*1000; - - DEBUG_PRINTF("ideal_H_period: %f\n",ideal_H_period) - - /* FIND IDEAL BLANKING DUTY CYCLE FROM FORMULA [%] */ - ideal_duty_cycle = c.c - (c.m * ideal_H_period /1000); - DEBUG_PRINTF("ideal_duty_cycle: %f\n",ideal_duty_cycle) - - /* FIND BLANKING TIME (TO NEAREST CHAR CELL) [pixels] */ - - blanking_time = round(total_active_pixels * ideal_duty_cycle \ - / (100-ideal_duty_cycle) / (2*c.char_cell_granularity)) \ - * (2*c.char_cell_granularity); - DEBUG_PRINTF("blanking_time : %f\n",blanking_time ) - - /* FIND TOTAL NUMBER OF PIXELS IN A LINE [pixels] */ - H_total_pixels = total_active_pixels + blanking_time ; - DEBUG_PRINTF("H_total_pixels: %f\n",H_total_pixels) - H_freq = freq / H_total_pixels * 1000; - DEBUG_PRINTF("H_freq: %f\n",H_freq) - actual_H_period = 1000 / H_freq; - DEBUG_PRINTF("actual_H_period: %f\n",actual_H_period) - sync_plus_BP = round(H_freq * c.min_Vsync_BP/1000); -// sync_plus_BP = round( freq / H_total_pixels * c.min_Vsync_BP); - - DEBUG_PRINTF("sync_plus_BP: %f\n",sync_plus_BP) - - } else if (type == GTF_VF) - { - - /* ESTIMATE HORIZ. PERIOD [us] */ - - estimated_H_period = (( 1/RR ) - c.min_Vsync_BP/1000000 ) / (Y + (2 * margin_top) + c.min_front_porch + interlace) * 1000000; - - DEBUG_PRINTF("estimated_H_period: %f\n",estimated_H_period) - - /* FIND NUMBER OF LINES IN (SYNC + BACK PORCH) [lines] */ - - sync_plus_BP = round( c.min_Vsync_BP / estimated_H_period ); - DEBUG_PRINTF("sync_plus_BP: %f\n",sync_plus_BP) - - } else if (type == GTF_HF) - { - sync_plus_BP = round(freq * c.min_Vsync_BP/1000); - DEBUG_PRINTF("sync_plus_BP: %f\n",sync_plus_BP) - } - - - - /* FIND TOTAL NUMBER OF LINES IN VERTICAL FIELD */ - - V_total_lines_field = sync_plus_BP+interlace+margin_bottom+margin_top+Y+c.min_front_porch; - DEBUG_PRINTF("V_total_lines_field : %f\n",V_total_lines_field ) - - if (type == GTF_VF) - { - /* ESTIMATE VERTICAL FIELD RATE [hz] */ - - estimated_V_field_rate = 1 / estimated_H_period / V_total_lines_field * 1000000; - DEBUG_PRINTF(" estimated_V_field_rate: %f\n", estimated_V_field_rate) - /* FIND ACTUAL HORIZONTAL PERIOD [us] */ - - actual_H_period = estimated_H_period / (RR / estimated_V_field_rate); - DEBUG_PRINTF("actual_H_period: %f\n",actual_H_period) - /* FIND ACTUAL VERTICAL FIELD FREQUENCY [Hz] */ - - actual_V_field_freq = 1 / actual_H_period / V_total_lines_field * 1000000; - DEBUG_PRINTF("actual_V_field_freq: %f\n",actual_V_field_freq) - - /* FIND IDEAL BLANKING DUTY CYCLE FROM FORMULA [%] */ - ideal_duty_cycle = c.c - (c.m * actual_H_period /1000); - DEBUG_PRINTF("ideal_duty_cycle: %f\n",ideal_duty_cycle) - //if (type == GTF_VF) - //{ - //moved - //} - } else if (type == GTF_HF) - { - /* FIND IDEAL BLANKING DUTY CYCLE FROM FORMULA [%] */ - ideal_duty_cycle = c.c - (c.m / freq); - DEBUG_PRINTF("ideal_duty_cycle: %f\n",ideal_duty_cycle) - } - - /* FIND BLANKING TIME (TO NEAREST CHAR CELL) [pixels] */ - - if (!(type == GTF_PF)) - { - blanking_time = round(total_active_pixels * ideal_duty_cycle \ - / (100-ideal_duty_cycle) / (2*c.char_cell_granularity)) \ - * (2*c.char_cell_granularity); - DEBUG_PRINTF("blanking_time : %f\n",blanking_time ) - } - else -// if (type == GTF_PF) - { - actual_V_field_freq = H_freq / V_total_lines_field * 1000; - } - - if (type == GTF_HF) - { - /* Hz */ - actual_V_field_freq = freq / V_total_lines_field * 1000; - DEBUG_PRINTF("actual_V_field_freq: %f\n",actual_V_field_freq) - } - - - actual_V_frame_freq = actual_V_field_freq; - - /* FIND ACTUAL VERTICAL FRAME FREQUENCY [Hz]*/ - - if (want_interlace) actual_V_frame_freq = actual_V_field_freq / 2; - DEBUG_PRINTF("actual_V_frame_freq: %f\n",actual_V_frame_freq) - -// V_freq = actual_V_frame_freq; -// DEBUG_PRINTF("V_freq %f\n",V_freq) - - - if (!(type == GTF_PF)) - { - /* FIND TOTAL NUMBER OF PIXELS IN A LINE [pixels] */ - H_total_pixels = total_active_pixels + blanking_time ; - DEBUG_PRINTF("H_total_pixels: %f\n",H_total_pixels) - if (type == GTF_VF) - { - /* FIND PIXEL FREQUENCY [Mhz] */ - pixel_freq = H_total_pixels / actual_H_period ; - DEBUG_PRINTF("pixel_freq: %f\n",pixel_freq) - } else if (type == GTF_HF) - { - /* FIND PIXEL FREQUENCY [Mhz] */ - pixel_freq = H_total_pixels * freq / 1000 ; - DEBUG_PRINTF("pixel_freq: %f\n",pixel_freq) - actual_H_period = 1000/freq; - } - - /* FIND ACTUAL HORIZONTAL FREQUENCY [KHz] */ - - H_freq = 1000 / actual_H_period; - DEBUG_PRINTF("H_freq %f\n",H_freq) - - - } - - /* FIND NUMBER OF LINES IN BACK PORCH [lines] */ - - BP = sync_plus_BP - c.Vsync_need; - DEBUG_PRINTF("BP: %f\n",BP) - -/*------------------------------------------------------------------------------------------------*/ - /* FIND H SYNC WIDTH (TO NEAREST CHAR CELL) */ - H_sync_width = round(c.sync_width/100*H_total_pixels/c.char_cell_granularity)*c.char_cell_granularity; - DEBUG_PRINTF("H_sync_width %f\n",H_sync_width) - - /* FIND FRONT H PORCH(TO NEAREST CHAR CELL) */ - H_front_porch = (blanking_time/2) - H_sync_width; - DEBUG_PRINTF("H_front_porch %f\n",H_front_porch) - /* FIND BACK H PORCH(TO NEAREST CHAR CELL) */ - H_back_porch = H_sync_width + H_front_porch; - DEBUG_PRINTF("H_back_porch%f\n",H_back_porch) - - H_sync_start = H_total_pixels - (H_sync_width + H_back_porch); - DEBUG_PRINTF("H_sync_start %f\n",H_sync_start) - H_sync_end = H_total_pixels - H_back_porch; - DEBUG_PRINTF("H_sync_end %f\n",H_sync_end) - - V_back_porch = interlace + BP; - DEBUG_PRINTF("V_back_porch%f\n",V_back_porch) - V_front_porch = interlace + c.min_front_porch; - DEBUG_PRINTF("V_front_porch%f\n",V_front_porch) - - V_sync_width = c.Vsync_need; - V_sync_start = V_total_lines_field - (V_sync_width + V_back_porch); - DEBUG_PRINTF("V_sync_start %f\n",V_sync_start) - V_sync_end = V_total_lines_field - V_back_porch; - DEBUG_PRINTF("V_sync_end %f\n",V_sync_end) - - result->hTotal = H_total_pixels; - result-> hSyncStart = H_sync_start; /* Horizontal sync start in pixels */ - result-> hSyncEnd = H_sync_end; /* Horizontal sync end in pixels */ - result-> vTotal= V_total_lines_field; /* Vertical total in lines */ - result-> vSyncStart = V_sync_start; /* Vertical sync start in lines */ - result-> vSyncEnd = V_sync_end; /* Vertical sync end in lines */ - result-> Flags = (result->Flags)|VESA_CRTC_HSYNC_NEG; /* Flags (Interlaced, Double Scan etc) */ - - if (want_interlace) - { - result->Flags = (result->Flags) | VESA_CRTC_INTERLACED; - } - - result-> PixelClock = pixel_freq*1000000; /* Pixel clock in units of Hz */ - result-> RefreshRate = actual_V_frame_freq*100;/* Refresh rate in units of 0.01 Hz*/ - - } |