mirror of
https://github.com/radio95-rnt/rds95.git
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71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/*
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* mpxgen - FM multiplex encoder with Stereo and RDS
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* Copyright (C) 2019 Anthony96922
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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 "common.h"
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#include "rds.h"
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#include "fm_mpx.h"
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static float mpx_vol;
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static uint8_t rdsgen;
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void set_output_volume(float vol) {
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if (vol > 100.0f) vol = 100.0f;
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mpx_vol = vol / 100.0f;
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}
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void set_rdsgen(uint8_t gen) {
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if (gen > 1) gen = 1;
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rdsgen = gen;
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}
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void set_carrier_volume(uint8_t carrier, float new_volume) {
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(void)carrier;
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mpx_vol = new_volume / 100.0f;
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}
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void fm_mpx_init(uint32_t sample_rate) {
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(void)sample_rate;
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rdsgen = 1;
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}
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void fm_rds_get_frames(float *outbuf, size_t num_frames) {
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size_t j = 0;
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float out;
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for (size_t i = 0; i < num_frames; i++) {
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out = 0.0f;
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out += get_rds_sample(0);
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/* clipper */
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out = fminf(+1.0f, out);
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out = fmaxf(-1.0f, out);
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/* adjust volume and put into channel */
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if(rdsgen != 0) outbuf[j] = out * mpx_vol;
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j++;
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}
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}
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void fm_mpx_exit() {
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return;
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}
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