95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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*
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* This file is part of PortaPack.
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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 2, or (at your option)
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __SSTV_H__
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#define __SSTV_H__
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namespace sstv {
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#define SSTV_SAMPLERATE 3072000
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#define SSTV_DELTA_COEF ((1ULL << 32) / SSTV_SAMPLERATE)
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#define SSTV_F2D(f) (uint32_t)((f) * SSTV_DELTA_COEF)
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#define SSTV_MS2S(d) (uint32_t)((d) / 1000.0 * (float)SSTV_SAMPLERATE)
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#define SSTV_VIS_SS SSTV_F2D(1200)
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#define SSTV_VIS_ZERO SSTV_F2D(1300)
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#define SSTV_VIS_ONE SSTV_F2D(1100)
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enum sstv_color_seq {
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SSTV_COLOR_RGB,
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SSTV_COLOR_GBR,
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SSTV_COLOR_YUV // Not supported for now
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};
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#define SSTV_MODES_NB 6
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// From http://www.graphics.stanford.edu/~seander/bithacks.html, nice !
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constexpr inline uint8_t sstv_parity(uint8_t code) {
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uint8_t out = code;
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out ^= code >> 4;
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out &= 0x0F;
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return (((0b0110100110010110 >> out) & 1) << 7) | code;
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}
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struct sstv_tone {
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uint32_t frequency;
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uint32_t duration;
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};
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struct sstv_scanline {
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sstv_tone start_tone;
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sstv_tone gap_tone;
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uint8_t luma[320];
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};
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struct sstv_mode {
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char name[16];
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uint8_t vis_code;
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bool color; // Unused for now
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sstv_color_seq color_sequence;
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uint16_t pixels;
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uint16_t lines;
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uint32_t samples_per_pixel;
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bool sync_on_first;
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uint8_t sync_index;
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bool gaps;
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uint32_t samples_per_sync;
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uint32_t samples_per_gap;
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//std::pair<uint16_t, uint16_t> luma_range;
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};
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constexpr sstv_mode sstv_modes[SSTV_MODES_NB] = {
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{ "Scottie 1", sstv_parity(60), true, SSTV_COLOR_GBR, 320, 256, SSTV_MS2S(0.4320), true, 2, true, SSTV_MS2S(9), SSTV_MS2S(1.5) },
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{ "Scottie 2", sstv_parity(56), true, SSTV_COLOR_GBR, 320, 256, SSTV_MS2S(0.2752), true, 2, true, SSTV_MS2S(9), SSTV_MS2S(1.5) },
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{ "Scottie DX", sstv_parity(76), true, SSTV_COLOR_GBR, 320, 256, SSTV_MS2S(1.08), true, 2, true, SSTV_MS2S(9), SSTV_MS2S(1.5) },
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{ "Martin 1", sstv_parity(44), true, SSTV_COLOR_GBR, 320, 256, SSTV_MS2S(0.4576), false, 0, true, SSTV_MS2S(4.862), SSTV_MS2S(0.572) },
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{ "Martin 2", sstv_parity(40), true, SSTV_COLOR_GBR, 320, 256, SSTV_MS2S(0.2288), false, 0, true, SSTV_MS2S(4.862), SSTV_MS2S(0.572) },
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{ "SC2-180", sstv_parity(55), true, SSTV_COLOR_RGB, 320, 256, SSTV_MS2S(0.7344), false, 0, false, SSTV_MS2S(5.5225), SSTV_MS2S(0.5) },
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//{ "PASOKON 3", sstv_parity(113), true, SSTV_COLOR_RGB, 640, 496, SSTV_MS2S(0.2083), { 1500, 2300 } },
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//{ "PASOKON 7", sstv_parity(115), true, SSTV_COLOR_RGB, 640, 496, SSTV_MS2S(0.4167), { 1500, 2300 } }
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};
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} /* namespace sstv */
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#endif/*__SSTV_H__*/
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