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65 lines
2.4 KiB
C
65 lines
2.4 KiB
C
//
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// Copyright (C) 2015-2016 Markus Hiienkari <mhiienka@niksula.hut.fi>
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//
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// This file is part of Open Source Scan Converter project.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#include <stdio.h>
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#include <unistd.h>
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#include "system.h"
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#include "video_modes.h"
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#define LINECNT_MAX_TOLERANCE 30
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const mode_data_t video_modes_default[] = VIDEO_MODES_DEF;
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mode_data_t video_modes[VIDEO_MODES_CNT];
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/* TODO: rewrite, check hz etc. */
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alt_8 get_mode_id(alt_u32 totlines, alt_u8 progressive, alt_u32 hz, video_type typemask, alt_u8 linemult_target, alt_u8 l3_mode, alt_u8 s480p_mode)
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{
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alt_8 i;
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alt_u8 num_modes = sizeof(video_modes)/sizeof(mode_data_t);
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video_type mode_type;
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// TODO: a better check
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for (i=0; i<num_modes; i++) {
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mode_type = video_modes[i].type;
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// disable particular 480p mode based on input and user preference
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if (video_modes[i].flags & MODE_DTV480P) {
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if (s480p_mode == 0) // auto
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mode_type &= ~VIDEO_PC;
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else if (s480p_mode == 2) // VGA 640x480
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mode_type = 0;
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} else if (video_modes[i].flags & MODE_VGA480P) {
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if (s480p_mode == 0) // auto
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mode_type &= ~VIDEO_EDTV;
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else if (s480p_mode == 1) // DTV 480P
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mode_type = 0;
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}
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if ((typemask & mode_type) && (progressive == !(video_modes[i].flags & MODE_INTERLACED)) && (totlines <= (video_modes[i].v_total+LINECNT_MAX_TOLERANCE))) {
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if (linemult_target && (video_modes[i].flags & MODE_L3ENABLE_MASK) && ((video_modes[i].flags & MODE_L3ENABLE_MASK) == (1<<l3_mode))) {
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return i;
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} else if (!(video_modes[i].flags & MODE_L3ENABLE_MASK)) {
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return i;
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}
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}
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}
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return -1;
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}
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