36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* television modulator
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*
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* (C) 2017 by Andreas Eversberg <jolly@eversberg.eu>
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* All Rights Reserved
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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 <math.h>
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#include <stdint.h>
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#include "../libsample/sample.h"
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#include "tv_modulate.h"
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#define WHITE_MODULATION 0.1
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void tv_modulate(float *buff, int count, sample_t *bas, double amplitude)
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{
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int i, ss = 0;
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for (i = 0; i < count; i++) {
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buff[ss++] = ((1.0 - bas[i]) * (1.0 - WHITE_MODULATION) + WHITE_MODULATION) * amplitude;
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buff[ss++] = 0;
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}
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}
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