Restructure: Move sdr from common code to 'libsdr'
This commit is contained in:
Andreas Eversberg
865
src/libsdr/sdr.c
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865
src/libsdr/sdr.c
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@@ -0,0 +1,865 @@
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/* SDR processing
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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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enum paging_signal;
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <math.h>
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#include <getopt.h>
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#define __USE_GNU
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#include <pthread.h>
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#include <unistd.h>
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#include "../common/sample.h"
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#include "../libfm/fm.h"
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#include "../libtimer/timer.h"
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#include "../common/sender.h"
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#include "sdr_config.h"
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#include "sdr.h"
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#ifdef HAVE_UHD
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#include "uhd.h"
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#endif
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#ifdef HAVE_SOAPY
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#include "soapy.h"
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#endif
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#include "../common/debug.h"
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/* enable to debug buffer handling */
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//#define DEBUG_BUFFER
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/* enable to test without oversampling filter */
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//#define DISABLE_FILTER
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/* usable bandwidth of IQ rate, because no filter is perfect */
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#define USABLE_BANDWIDTH 0.75
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int sdr_rx_overflow = 0;
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typedef struct sdr_thread {
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int use;
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volatile int running, exit; /* flags to control exit of threads */
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int buffer_size;
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volatile float *buffer;
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float *buffer2;
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volatile int in, out; /* in and out pointers (atomic, so no locking required) */
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int max_fill; /* measure maximum buffer fill */
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double max_fill_timer; /* timer to display/reset maximum fill */
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iir_filter_t lp[2]; /* filter for upsample/downsample IQ data */
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} sdr_thread_t;
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typedef struct sdr_chan {
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double tx_frequency; /* frequency used */
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double rx_frequency; /* frequency used */
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fm_mod_t mod; /* modulator instance */
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fm_demod_t demod; /* demodulator instance */
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dispmeasparam_t *dmp_rf_level;
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dispmeasparam_t *dmp_freq_offset;
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dispmeasparam_t *dmp_deviation;
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} sdr_chan_t;
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typedef struct sdr {
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int threads; /* use threads */
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int oversample; /* oversample IQ rate */
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sdr_thread_t thread_read,
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thread_write;
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sdr_chan_t *chan; /* settings for all channels */
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int paging_channel; /* if set, points to paging channel */
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sdr_chan_t paging_chan; /* settings for extra paging channel */
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int channels; /* number of frequencies */
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double amplitude; /* amplitude of each carrier */
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int samplerate; /* sample rate of audio data */
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int latspl; /* latency in audio samples */
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wave_rec_t wave_rx_rec;
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wave_rec_t wave_tx_rec;
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wave_play_t wave_rx_play;
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wave_play_t wave_tx_play;
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float *modbuff; /* buffer for FM transmodulation */
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sample_t *modbuff_I;
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sample_t *modbuff_Q;
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sample_t *wavespl0; /* sample buffer for wave generation */
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sample_t *wavespl1;
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} sdr_t;
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void *sdr_open(const char __attribute__((__unused__)) *audiodev, double *tx_frequency, double *rx_frequency, int channels, double paging_frequency, int samplerate, int latspl, double max_deviation, double max_modulation)
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{
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sdr_t *sdr;
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int threads = 1, oversample = 1; /* always use threads */
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double bandwidth;
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double tx_center_frequency = 0.0, rx_center_frequency = 0.0;
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int rc;
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int c;
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PDEBUG(DSDR, DEBUG_DEBUG, "Open SDR device\n");
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if (sdr_config->samplerate != samplerate) {
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if (samplerate > sdr_config->samplerate) {
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PDEBUG(DSDR, DEBUG_ERROR, "SDR sample rate must be greater than audio sample rate!\n");
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PDEBUG(DSDR, DEBUG_ERROR, "You selected an SDR rate of %d and an audio rate of %d.\n", sdr_config->samplerate, samplerate);
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return NULL;
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}
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if ((sdr_config->samplerate % samplerate)) {
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PDEBUG(DSDR, DEBUG_ERROR, "SDR sample rate must be a multiple of audio sample rate!\n");
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PDEBUG(DSDR, DEBUG_ERROR, "You selected an SDR rate of %d and an audio rate of %d.\n", sdr_config->samplerate, samplerate);
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return NULL;
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}
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oversample = sdr_config->samplerate / samplerate;
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threads = 1;
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}
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bandwidth = 2.0 * (max_deviation + max_modulation);
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PDEBUG(DSDR, DEBUG_INFO, "Require bandwidth of each channel is 2 * (%.1f deviation + %.1f modulation) = %.1f KHz\n", max_deviation / 1e3, max_modulation / 1e3, bandwidth / 1e3);
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if (channels < 1) {
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PDEBUG(DSDR, DEBUG_ERROR, "No channel given, please fix!\n");
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abort();
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}
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sdr = calloc(sizeof(*sdr), 1);
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if (!sdr) {
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PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
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goto error;
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}
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sdr->channels = channels;
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sdr->amplitude = 1.0 / (double)channels;
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sdr->samplerate = samplerate;
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sdr->latspl = latspl;
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sdr->threads = threads; /* always requried, because write may block */
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sdr->oversample = oversample;
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if (threads) {
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memset(&sdr->thread_read, 0, sizeof(sdr->thread_read));
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sdr->thread_read.buffer_size = sdr->latspl * 2 * sdr->oversample + 2;
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sdr->thread_read.buffer = calloc(sdr->thread_read.buffer_size, sizeof(*sdr->thread_read.buffer));
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if (!sdr->thread_read.buffer) {
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PDEBUG(DSDR, DEBUG_ERROR, "No mem!\n");
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goto error;
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}
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sdr->thread_read.buffer2 = calloc(sdr->thread_read.buffer_size, sizeof(*sdr->thread_read.buffer2));
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if (!sdr->thread_read.buffer2) {
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PDEBUG(DSDR, DEBUG_ERROR, "No mem!\n");
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goto error;
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}
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sdr->thread_read.in = sdr->thread_read.out = 0;
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if (oversample > 1) {
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iir_lowpass_init(&sdr->thread_read.lp[0], samplerate / 2.0, sdr_config->samplerate, 2);
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iir_lowpass_init(&sdr->thread_read.lp[1], samplerate / 2.0, sdr_config->samplerate, 2);
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}
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memset(&sdr->thread_write, 0, sizeof(sdr->thread_write));
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sdr->thread_write.buffer_size = sdr->latspl * 2 + 2;
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sdr->thread_write.buffer = calloc(sdr->thread_write.buffer_size, sizeof(*sdr->thread_write.buffer));
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if (!sdr->thread_write.buffer) {
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PDEBUG(DSDR, DEBUG_ERROR, "No mem!\n");
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goto error;
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}
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sdr->thread_write.buffer2 = calloc(sdr->thread_write.buffer_size * sdr->oversample, sizeof(*sdr->thread_write.buffer2));
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if (!sdr->thread_write.buffer2) {
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PDEBUG(DSDR, DEBUG_ERROR, "No mem!\n");
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goto error;
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}
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sdr->thread_write.in = sdr->thread_write.out = 0;
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if (oversample > 1) {
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iir_lowpass_init(&sdr->thread_write.lp[0], samplerate / 2.0, sdr_config->samplerate, 2);
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iir_lowpass_init(&sdr->thread_write.lp[1], samplerate / 2.0, sdr_config->samplerate, 2);
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}
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}
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/* alloc fm modulation buffers */
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sdr->modbuff = calloc(sdr->latspl * 2, sizeof(*sdr->modbuff));
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if (!sdr->modbuff) {
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PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
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goto error;
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}
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sdr->modbuff_I = calloc(sdr->latspl, sizeof(*sdr->modbuff_I));
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if (!sdr->modbuff_I) {
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PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
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goto error;
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}
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sdr->modbuff_Q = calloc(sdr->latspl, sizeof(*sdr->modbuff_Q));
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if (!sdr->modbuff_Q) {
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PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
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goto error;
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}
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sdr->wavespl0 = calloc(sdr->latspl, sizeof(*sdr->wavespl0));
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if (!sdr->wavespl0) {
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PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
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goto error;
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}
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sdr->wavespl1 = calloc(sdr->latspl, sizeof(*sdr->wavespl1));
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if (!sdr->wavespl1) {
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PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
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goto error;
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}
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/* special case where we use a paging frequency */
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if (paging_frequency) {
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/* add extra paging channel */
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sdr->paging_channel = channels;
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}
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/* create list of channel states */
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sdr->chan = calloc(sizeof(*sdr->chan), channels + (sdr->paging_channel != 0));
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if (!sdr->chan) {
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PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
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goto error;
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}
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if (tx_frequency) {
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/* calculate required bandwidth (IQ rate) */
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for (c = 0; c < channels; c++) {
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PDEBUG(DSDR, DEBUG_INFO, "Frequency #%d: TX = %.6f MHz\n", c, tx_frequency[c] / 1e6);
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sdr->chan[c].tx_frequency = tx_frequency[c];
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}
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if (sdr->paging_channel) {
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PDEBUG(DSDR, DEBUG_INFO, "Paging Frequency: TX = %.6f MHz\n", paging_frequency / 1e6);
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sdr->chan[sdr->paging_channel].tx_frequency = paging_frequency;
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}
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double tx_low_frequency = sdr->chan[0].tx_frequency, tx_high_frequency = sdr->chan[0].tx_frequency;
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for (c = 1; c < channels; c++) {
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if (sdr->chan[c].tx_frequency < tx_low_frequency)
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tx_low_frequency = sdr->chan[c].tx_frequency;
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if (sdr->chan[c].tx_frequency > tx_high_frequency)
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tx_high_frequency = sdr->chan[c].tx_frequency;
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}
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if (sdr->paging_channel) {
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if (sdr->chan[sdr->paging_channel].tx_frequency < tx_low_frequency)
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tx_low_frequency = sdr->chan[sdr->paging_channel].tx_frequency;
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if (sdr->chan[sdr->paging_channel].tx_frequency > tx_high_frequency)
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tx_high_frequency = sdr->chan[sdr->paging_channel].tx_frequency;
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}
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/* range of TX */
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double range = tx_high_frequency - tx_low_frequency + bandwidth;
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PDEBUG(DSDR, DEBUG_INFO, "Total bandwidth for all TX Frequencies: %.0f Hz\n", range);
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if (range > samplerate * USABLE_BANDWIDTH) {
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PDEBUG(DSDR, DEBUG_NOTICE, "*******************************************************************************\n");
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PDEBUG(DSDR, DEBUG_NOTICE, "The required bandwidth of %.0f Hz exceeds %.0f%% of the sample rate.\n", range, USABLE_BANDWIDTH * 100.0);
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PDEBUG(DSDR, DEBUG_NOTICE, "Please increase samplerate!\n");
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PDEBUG(DSDR, DEBUG_NOTICE, "*******************************************************************************\n");
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goto error;
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}
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tx_center_frequency = (tx_high_frequency + tx_low_frequency) / 2.0;
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PDEBUG(DSDR, DEBUG_INFO, "Using center frequency: TX %.6f MHz\n", tx_center_frequency / 1e6);
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/* set offsets to center frequency */
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for (c = 0; c < channels; c++) {
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double tx_offset;
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tx_offset = sdr->chan[c].tx_frequency - tx_center_frequency;
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PDEBUG(DSDR, DEBUG_DEBUG, "Frequency #%d: TX offset: %.6f MHz\n", c, tx_offset / 1e6);
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rc = fm_mod_init(&sdr->chan[c].mod, samplerate, tx_offset, sdr->amplitude);
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if (rc < 0)
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goto error;
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}
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if (sdr->paging_channel) {
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double tx_offset;
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tx_offset = sdr->chan[sdr->paging_channel].tx_frequency - tx_center_frequency;
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PDEBUG(DSDR, DEBUG_DEBUG, "Paging Frequency: TX offset: %.6f MHz\n", tx_offset / 1e6);
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rc = fm_mod_init(&sdr->chan[sdr->paging_channel].mod, samplerate, tx_offset, sdr->amplitude);
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if (rc < 0)
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goto error;
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}
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/* show gain */
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PDEBUG(DSDR, DEBUG_INFO, "Using gain: TX %.1f dB\n", sdr_config->tx_gain);
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/* open wave */
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if (sdr_config->write_iq_tx_wave) {
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rc = wave_create_record(&sdr->wave_tx_rec, sdr_config->write_iq_tx_wave, samplerate, 2, 1.0);
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if (rc < 0) {
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PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
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goto error;
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}
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}
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if (sdr_config->read_iq_tx_wave) {
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rc = wave_create_playback(&sdr->wave_tx_play, sdr_config->read_iq_tx_wave, samplerate, 2, 1.0);
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if (rc < 0) {
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PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
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goto error;
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}
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}
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}
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if (rx_frequency) {
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for (c = 0; c < channels; c++) {
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PDEBUG(DSDR, DEBUG_INFO, "Frequency #%d: RX = %.6f MHz\n", c, rx_frequency[c] / 1e6);
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sdr->chan[c].rx_frequency = rx_frequency[c];
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}
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/* calculate required bandwidth (IQ rate) */
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double rx_low_frequency = sdr->chan[0].rx_frequency, rx_high_frequency = sdr->chan[0].rx_frequency;
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for (c = 1; c < channels; c++) {
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if (sdr->chan[c].rx_frequency < rx_low_frequency)
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rx_low_frequency = sdr->chan[c].rx_frequency;
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if (sdr->chan[c].rx_frequency > rx_high_frequency)
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rx_high_frequency = sdr->chan[c].rx_frequency;
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}
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/* range of RX */
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double range = rx_high_frequency - rx_low_frequency + bandwidth;
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PDEBUG(DSDR, DEBUG_INFO, "Total bandwidth for all RX Frequencies: %.0f Hz\n", range);
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if (range > samplerate * USABLE_BANDWIDTH) {
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PDEBUG(DSDR, DEBUG_NOTICE, "*******************************************************************************\n");
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PDEBUG(DSDR, DEBUG_NOTICE, "The required bandwidth of %.0f Hz exceeds %.0f%% of the sample rate.\n", range, USABLE_BANDWIDTH * 100.0);
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PDEBUG(DSDR, DEBUG_NOTICE, "Please increase samplerate!\n");
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PDEBUG(DSDR, DEBUG_NOTICE, "*******************************************************************************\n");
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goto error;
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}
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rx_center_frequency = (rx_high_frequency + rx_low_frequency) / 2.0;
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PDEBUG(DSDR, DEBUG_INFO, "Using center frequency: RX %.6f MHz\n", rx_center_frequency / 1e6);
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/* set offsets to center frequency */
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for (c = 0; c < channels; c++) {
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double rx_offset;
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rx_offset = sdr->chan[c].rx_frequency - rx_center_frequency;
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PDEBUG(DSDR, DEBUG_DEBUG, "Frequency #%d: RX offset: %.6f MHz\n", c, rx_offset / 1e6);
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rc = fm_demod_init(&sdr->chan[c].demod, samplerate, rx_offset, bandwidth);
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if (rc < 0)
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goto error;
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}
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/* show gain */
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PDEBUG(DSDR, DEBUG_INFO, "Using gain: RX %.1f dB\n", sdr_config->rx_gain);
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/* open wave */
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if (sdr_config->write_iq_rx_wave) {
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rc = wave_create_record(&sdr->wave_rx_rec, sdr_config->write_iq_rx_wave, samplerate, 2, 1.0);
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if (rc < 0) {
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PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
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goto error;
|
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}
|
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}
|
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if (sdr_config->read_iq_rx_wave) {
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rc = wave_create_playback(&sdr->wave_rx_play, sdr_config->read_iq_rx_wave, samplerate, 2, 1.0);
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if (rc < 0) {
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PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
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goto error;
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}
|
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}
|
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/* init measurements display */
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for (c = 0; c < channels; c++) {
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sender_t *sender = get_sender_by_empfangsfrequenz(sdr->chan[c].rx_frequency);
|
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if (!sender)
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continue;
|
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sdr->chan[c].dmp_rf_level = display_measurements_add(sender, "RF Level", "%.1f dB", DISPLAY_MEAS_AVG, DISPLAY_MEAS_LEFT, -96.0, 0.0, -INFINITY);
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sdr->chan[c].dmp_freq_offset = display_measurements_add(sender, "Freq. Offset", "%+.2f KHz", DISPLAY_MEAS_AVG, DISPLAY_MEAS_CENTER, -max_deviation / 1000.0 * 2.0, max_deviation / 1000.0 * 2.0, 0.0);
|
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sdr->chan[c].dmp_deviation = display_measurements_add(sender, "Deviation", "%.2f KHz", DISPLAY_MEAS_PEAK2PEAK, DISPLAY_MEAS_LEFT, 0.0, max_deviation / 1000.0 * 1.5, max_deviation / 1000.0);
|
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}
|
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}
|
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|
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if (sdr_config->swap_links) {
|
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double temp;
|
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PDEBUG(DSDR, DEBUG_NOTICE, "Sapping RX and TX frequencies!\n");
|
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temp = rx_center_frequency;
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rx_center_frequency = tx_center_frequency;
|
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tx_center_frequency = temp;
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}
|
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|
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display_iq_init(samplerate);
|
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display_spectrum_init(samplerate, rx_center_frequency);
|
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|
||||
#ifdef HAVE_UHD
|
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if (sdr_config->uhd) {
|
||||
rc = uhd_open(sdr_config->channel, sdr_config->device_args, sdr_config->stream_args, sdr_config->tune_args, sdr_config->tx_antenna, sdr_config->rx_antenna, tx_center_frequency, rx_center_frequency, sdr_config->samplerate, sdr_config->tx_gain, sdr_config->rx_gain, sdr_config->bandwidth, sdr_config->uhd_tx_timestamps);
|
||||
if (rc)
|
||||
goto error;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_SOAPY
|
||||
if (sdr_config->soapy) {
|
||||
rc = soapy_open(sdr_config->channel, sdr_config->device_args, sdr_config->stream_args, sdr_config->tune_args, sdr_config->tx_antenna, sdr_config->rx_antenna, tx_center_frequency, rx_center_frequency, sdr_config->samplerate, sdr_config->tx_gain, sdr_config->rx_gain, sdr_config->bandwidth);
|
||||
if (rc)
|
||||
goto error;
|
||||
}
|
||||
#endif
|
||||
|
||||
return sdr;
|
||||
|
||||
error:
|
||||
sdr_close(sdr);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void *sdr_write_child(void *arg)
|
||||
{
|
||||
sdr_t *sdr = (sdr_t *)arg;
|
||||
int num;
|
||||
int fill, out;
|
||||
int s, ss, o;
|
||||
|
||||
while (sdr->thread_write.running) {
|
||||
/* write to SDR */
|
||||
fill = (sdr->thread_write.in - sdr->thread_write.out + sdr->thread_write.buffer_size) % sdr->thread_write.buffer_size;
|
||||
num = fill / 2;
|
||||
if (num) {
|
||||
#ifdef DEBUG_BUFFER
|
||||
printf("Thread found %d samples in write buffer and forwards them to SDR.\n", num);
|
||||
#endif
|
||||
out = sdr->thread_write.out;
|
||||
for (s = 0, ss = 0; s < num; s++) {
|
||||
for (o = 0; o < sdr->oversample; o++) {
|
||||
sdr->thread_write.buffer2[ss++] = sdr->thread_write.buffer[out];
|
||||
sdr->thread_write.buffer2[ss++] = sdr->thread_write.buffer[out + 1];
|
||||
}
|
||||
out = (out + 2) % sdr->thread_write.buffer_size;
|
||||
}
|
||||
sdr->thread_write.out = out;
|
||||
#ifndef DISABLE_FILTER
|
||||
/* filter spectrum */
|
||||
if (sdr->oversample > 1) {
|
||||
iir_process_baseband(&sdr->thread_write.lp[0], sdr->thread_write.buffer2, num * sdr->oversample);
|
||||
iir_process_baseband(&sdr->thread_write.lp[1], sdr->thread_write.buffer2 + 1, num * sdr->oversample);
|
||||
}
|
||||
#endif
|
||||
#ifdef HAVE_UHD
|
||||
if (sdr_config->uhd)
|
||||
uhd_send(sdr->thread_write.buffer2, num * sdr->oversample);
|
||||
#endif
|
||||
#ifdef HAVE_SOAPY
|
||||
if (sdr_config->soapy)
|
||||
soapy_send(sdr->thread_write.buffer2, num * sdr->oversample);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* delay some time */
|
||||
usleep(1000);
|
||||
}
|
||||
|
||||
PDEBUG(DSDR, DEBUG_DEBUG, "Thread received exit!\n");
|
||||
sdr->thread_write.exit = 1;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void *sdr_read_child(void *arg)
|
||||
{
|
||||
sdr_t *sdr = (sdr_t *)arg;
|
||||
int num, count = 0;
|
||||
int space, in;
|
||||
int s, ss;
|
||||
|
||||
while (sdr->thread_read.running) {
|
||||
/* read from SDR */
|
||||
space = (sdr->thread_read.out - sdr->thread_read.in - 2 + sdr->thread_read.buffer_size) % sdr->thread_read.buffer_size;
|
||||
num = space / 2;
|
||||
if (num) {
|
||||
#ifdef HAVE_UHD
|
||||
if (sdr_config->uhd)
|
||||
count = uhd_receive(sdr->thread_read.buffer2, num);
|
||||
#endif
|
||||
#ifdef HAVE_SOAPY
|
||||
if (sdr_config->soapy)
|
||||
count = soapy_receive(sdr->thread_read.buffer2, num);
|
||||
#endif
|
||||
if (count > 0) {
|
||||
#ifdef DEBUG_BUFFER
|
||||
printf("Thread read %d samples from SDR and writes them to read buffer.\n", count);
|
||||
#endif
|
||||
#ifndef DISABLE_FILTER
|
||||
/* filter spectrum */
|
||||
if (sdr->oversample > 1) {
|
||||
iir_process_baseband(&sdr->thread_read.lp[0], sdr->thread_read.buffer2, count);
|
||||
iir_process_baseband(&sdr->thread_read.lp[1], sdr->thread_read.buffer2 + 1, count);
|
||||
}
|
||||
#endif
|
||||
in = sdr->thread_read.in;
|
||||
for (s = 0, ss = 0; s < count; s++) {
|
||||
sdr->thread_read.buffer[in++] = sdr->thread_read.buffer2[ss++];
|
||||
sdr->thread_read.buffer[in++] = sdr->thread_read.buffer2[ss++];
|
||||
in %= sdr->thread_read.buffer_size;
|
||||
}
|
||||
sdr->thread_read.in = in;
|
||||
}
|
||||
}
|
||||
|
||||
/* delay some time */
|
||||
usleep(1000);
|
||||
}
|
||||
|
||||
PDEBUG(DSDR, DEBUG_DEBUG, "Thread received exit!\n");
|
||||
sdr->thread_read.exit = 1;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* start streaming */
|
||||
int sdr_start(void *inst)
|
||||
{
|
||||
sdr_t *sdr = (sdr_t *)inst;
|
||||
int rc = -EINVAL;
|
||||
|
||||
#ifdef HAVE_UHD
|
||||
if (sdr_config->uhd)
|
||||
rc = uhd_start();
|
||||
#endif
|
||||
#ifdef HAVE_SOAPY
|
||||
if (sdr_config->soapy)
|
||||
rc = soapy_start();
|
||||
#endif
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
|
||||
if (sdr->threads) {
|
||||
int rc;
|
||||
pthread_t tid;
|
||||
char tname[64];
|
||||
|
||||
PDEBUG(DSDR, DEBUG_DEBUG, "Create threads!\n");
|
||||
sdr->thread_write.running = 1;
|
||||
sdr->thread_write.exit = 0;
|
||||
rc = pthread_create(&tid, NULL, sdr_write_child, inst);
|
||||
if (rc < 0) {
|
||||
sdr->thread_write.running = 0;
|
||||
PDEBUG(DSDR, DEBUG_ERROR, "Failed to create thread!\n");
|
||||
return rc;
|
||||
}
|
||||
pthread_getname_np(tid, tname, sizeof(tname));
|
||||
strncat(tname, "-sdr_tx", sizeof(tname));
|
||||
tname[sizeof(tname) - 1] = '\0';
|
||||
pthread_setname_np(tid, tname);
|
||||
sdr->thread_read.running = 1;
|
||||
sdr->thread_read.exit = 0;
|
||||
rc = pthread_create(&tid, NULL, sdr_read_child, inst);
|
||||
if (rc < 0) {
|
||||
sdr->thread_read.running = 0;
|
||||
PDEBUG(DSDR, DEBUG_ERROR, "Failed to create thread!\n");
|
||||
return rc;
|
||||
}
|
||||
pthread_getname_np(tid, tname, sizeof(tname));
|
||||
strncat(tname, "-sdr_rx", sizeof(tname));
|
||||
tname[sizeof(tname) - 1] = '\0';
|
||||
pthread_setname_np(tid, tname);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void sdr_close(void *inst)
|
||||
{
|
||||
sdr_t *sdr = (sdr_t *)inst;
|
||||
|
||||
PDEBUG(DSDR, DEBUG_DEBUG, "Close SDR device\n");
|
||||
|
||||
if (sdr->threads) {
|
||||
if (sdr->thread_write.running) {
|
||||
PDEBUG(DSDR, DEBUG_DEBUG, "Thread sending exit!\n");
|
||||
sdr->thread_write.running = 0;
|
||||
while (sdr->thread_write.exit == 0)
|
||||
usleep(1000);
|
||||
}
|
||||
if (sdr->thread_read.running) {
|
||||
PDEBUG(DSDR, DEBUG_DEBUG, "Thread sending exit!\n");
|
||||
sdr->thread_read.running = 0;
|
||||
while (sdr->thread_read.exit == 0)
|
||||
usleep(1000);
|
||||
}
|
||||
}
|
||||
|
||||
if (sdr->thread_read.buffer)
|
||||
free((void *)sdr->thread_read.buffer);
|
||||
if (sdr->thread_read.buffer2)
|
||||
free((void *)sdr->thread_read.buffer2);
|
||||
if (sdr->thread_write.buffer)
|
||||
free((void *)sdr->thread_write.buffer);
|
||||
if (sdr->thread_write.buffer2)
|
||||
free((void *)sdr->thread_write.buffer2);
|
||||
|
||||
#ifdef HAVE_UHD
|
||||
if (sdr_config->uhd)
|
||||
uhd_close();
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_SOAPY
|
||||
if (sdr_config->soapy)
|
||||
soapy_close();
|
||||
#endif
|
||||
|
||||
if (sdr) {
|
||||
free(sdr->modbuff);
|
||||
free(sdr->modbuff_I);
|
||||
free(sdr->modbuff_Q);
|
||||
free(sdr->wavespl0);
|
||||
free(sdr->wavespl1);
|
||||
wave_destroy_record(&sdr->wave_rx_rec);
|
||||
wave_destroy_record(&sdr->wave_tx_rec);
|
||||
wave_destroy_playback(&sdr->wave_rx_play);
|
||||
wave_destroy_playback(&sdr->wave_tx_play);
|
||||
if (sdr->chan) {
|
||||
int c;
|
||||
|
||||
for (c = 0; c < sdr->channels; c++) {
|
||||
fm_mod_exit(&sdr->chan[c].mod);
|
||||
fm_demod_exit(&sdr->chan[c].demod);
|
||||
}
|
||||
if (sdr->paging_channel)
|
||||
fm_mod_exit(&sdr->chan[sdr->paging_channel].mod);
|
||||
free(sdr->chan);
|
||||
}
|
||||
free(sdr);
|
||||
sdr = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
int sdr_write(void *inst, sample_t **samples, uint8_t **power, int num, enum paging_signal __attribute__((unused)) *paging_signal, int *on, int channels)
|
||||
{
|
||||
sdr_t *sdr = (sdr_t *)inst;
|
||||
float *buff = NULL;
|
||||
int c, s, ss;
|
||||
int sent = 0;
|
||||
|
||||
if (num > sdr->latspl) {
|
||||
fprintf(stderr, "exceeding maximum size given by sdr_latspl, please fix!\n");
|
||||
abort();
|
||||
}
|
||||
if (channels != sdr->channels && channels != 0) {
|
||||
PDEBUG(DSDR, DEBUG_ERROR, "Invalid number of channels, please fix!\n");
|
||||
abort();
|
||||
}
|
||||
|
||||
/* process all channels */
|
||||
if (channels) {
|
||||
buff = sdr->modbuff;
|
||||
memset(buff, 0, sizeof(*buff) * num * 2);
|
||||
for (c = 0; c < channels; c++) {
|
||||
/* switch to paging channel, if requested */
|
||||
if (on[c] && sdr->paging_channel)
|
||||
fm_modulate_complex(&sdr->chan[sdr->paging_channel].mod, samples[c], power[c], num, buff);
|
||||
else
|
||||
fm_modulate_complex(&sdr->chan[c].mod, samples[c], power[c], num, buff);
|
||||
}
|
||||
} else {
|
||||
buff = (float *)samples;
|
||||
}
|
||||
|
||||
if (sdr->wave_tx_rec.fp) {
|
||||
sample_t *spl_list[2] = { sdr->wavespl0, sdr->wavespl1 };
|
||||
for (s = 0, ss = 0; s < num; s++) {
|
||||
spl_list[0][s] = buff[ss++];
|
||||
spl_list[1][s] = buff[ss++];
|
||||
}
|
||||
wave_write(&sdr->wave_tx_rec, spl_list, num);
|
||||
}
|
||||
if (sdr->wave_tx_play.fp) {
|
||||
sample_t *spl_list[2] = { sdr->wavespl0, sdr->wavespl1 };
|
||||
wave_read(&sdr->wave_tx_play, spl_list, num);
|
||||
for (s = 0, ss = 0; s < num; s++) {
|
||||
buff[ss++] = spl_list[0][s];
|
||||
buff[ss++] = spl_list[1][s];
|
||||
}
|
||||
}
|
||||
|
||||
if (sdr->threads) {
|
||||
/* store data towards SDR in ring buffer */
|
||||
int fill, space, in;
|
||||
|
||||
fill = (sdr->thread_write.in - sdr->thread_write.out + sdr->thread_write.buffer_size) % sdr->thread_write.buffer_size;
|
||||
space = (sdr->thread_write.out - sdr->thread_write.in - 2 + sdr->thread_write.buffer_size) % sdr->thread_write.buffer_size;
|
||||
|
||||
/* debug fill level */
|
||||
if (fill > sdr->thread_write.max_fill)
|
||||
sdr->thread_write.max_fill = fill;
|
||||
if (sdr->thread_write.max_fill_timer == 0.0)
|
||||
sdr->thread_write.max_fill_timer = get_time();
|
||||
if (get_time() - sdr->thread_write.max_fill_timer > 1.0) {
|
||||
double delay;
|
||||
delay = (double)sdr->thread_write.max_fill / 2.0 / (double)sdr->samplerate;
|
||||
sdr->thread_write.max_fill = 0;
|
||||
sdr->thread_write.max_fill_timer += 1.0;
|
||||
PDEBUG(DSDR, DEBUG_DEBUG, "write delay = %.3f ms\n", delay * 1000.0);
|
||||
}
|
||||
|
||||
if (space < num * 2) {
|
||||
PDEBUG(DSDR, DEBUG_ERROR, "Write SDR buffer overflow!\n");
|
||||
num = space / 2;
|
||||
}
|
||||
#ifdef DEBUG_BUFFER
|
||||
printf("Writing %d samples to write buffer.\n", num);
|
||||
#endif
|
||||
in = sdr->thread_write.in;
|
||||
for (s = 0, ss = 0; s < num; s++) {
|
||||
sdr->thread_write.buffer[in++] = buff[ss++];
|
||||
sdr->thread_write.buffer[in++] = buff[ss++];
|
||||
in %= sdr->thread_write.buffer_size;
|
||||
}
|
||||
sdr->thread_write.in = in;
|
||||
sent = num;
|
||||
} else {
|
||||
#ifdef HAVE_UHD
|
||||
if (sdr_config->uhd)
|
||||
sent = uhd_send(buff, num);
|
||||
#endif
|
||||
#ifdef HAVE_SOAPY
|
||||
if (sdr_config->soapy)
|
||||
sent = soapy_send(buff, num);
|
||||
#endif
|
||||
if (sent < 0)
|
||||
return sent;
|
||||
}
|
||||
|
||||
return sent;
|
||||
}
|
||||
|
||||
int sdr_read(void *inst, sample_t **samples, int num, int channels, double *rf_level_db)
|
||||
{
|
||||
sdr_t *sdr = (sdr_t *)inst;
|
||||
float *buff = NULL;
|
||||
int count = 0;
|
||||
int c, s, ss;
|
||||
|
||||
if (num > sdr->latspl) {
|
||||
fprintf(stderr, "exceeding maximum size given by sdr_latspl, please fix!\n");
|
||||
abort();
|
||||
}
|
||||
|
||||
if (channels) {
|
||||
buff = sdr->modbuff;
|
||||
} else {
|
||||
buff = (float *)samples;
|
||||
}
|
||||
|
||||
if (sdr->threads) {
|
||||
/* load data from SDR out of ring buffer */
|
||||
int fill, out;
|
||||
|
||||
fill = (sdr->thread_read.in - sdr->thread_read.out + sdr->thread_read.buffer_size) % sdr->thread_read.buffer_size;
|
||||
|
||||
/* debug fill level */
|
||||
if (fill > sdr->thread_read.max_fill)
|
||||
sdr->thread_read.max_fill = fill;
|
||||
if (sdr->thread_read.max_fill_timer == 0.0)
|
||||
sdr->thread_read.max_fill_timer = get_time();
|
||||
if (get_time() - sdr->thread_read.max_fill_timer > 1.0) {
|
||||
double delay;
|
||||
delay = (double)sdr->thread_read.max_fill / 2.0 / (double)sdr_config->samplerate;
|
||||
sdr->thread_read.max_fill = 0;
|
||||
sdr->thread_read.max_fill_timer += 1.0;
|
||||
PDEBUG(DSDR, DEBUG_DEBUG, "read delay = %.3f ms\n", delay * 1000.0);
|
||||
}
|
||||
|
||||
if (fill / 2 / sdr->oversample < num)
|
||||
num = fill / 2 / sdr->oversample;
|
||||
#ifdef DEBUG_BUFFER
|
||||
printf("Reading %d samples from read buffer.\n", num);
|
||||
#endif
|
||||
out = sdr->thread_read.out;
|
||||
for (s = 0, ss = 0; s < num; s++) {
|
||||
buff[ss++] = sdr->thread_read.buffer[out];
|
||||
buff[ss++] = sdr->thread_read.buffer[out + 1];
|
||||
out = (out + 2 * sdr->oversample) % sdr->thread_read.buffer_size;
|
||||
}
|
||||
sdr->thread_read.out = out;
|
||||
count = num;
|
||||
} else {
|
||||
#ifdef HAVE_UHD
|
||||
if (sdr_config->uhd)
|
||||
count = uhd_receive(buff, num);
|
||||
#endif
|
||||
#ifdef HAVE_SOAPY
|
||||
if (sdr_config->soapy)
|
||||
count = soapy_receive(buff, num);
|
||||
#endif
|
||||
if (count <= 0)
|
||||
return count;
|
||||
}
|
||||
|
||||
if (sdr_rx_overflow) {
|
||||
PDEBUG(DSDR, DEBUG_ERROR, "SDR RX overflow!\n");
|
||||
sdr_rx_overflow = 0;
|
||||
}
|
||||
|
||||
if (sdr->wave_rx_rec.fp) {
|
||||
sample_t *spl_list[2] = { sdr->wavespl0, sdr->wavespl1 };
|
||||
for (s = 0, ss = 0; s < count; s++) {
|
||||
spl_list[0][s] = buff[ss++];
|
||||
spl_list[1][s] = buff[ss++];
|
||||
}
|
||||
wave_write(&sdr->wave_rx_rec, spl_list, count);
|
||||
}
|
||||
if (sdr->wave_rx_play.fp) {
|
||||
sample_t *spl_list[2] = { sdr->wavespl0, sdr->wavespl1 };
|
||||
wave_read(&sdr->wave_rx_play, spl_list, count);
|
||||
for (s = 0, ss = 0; s < count; s++) {
|
||||
buff[ss++] = spl_list[0][s];
|
||||
buff[ss++] = spl_list[1][s];
|
||||
}
|
||||
}
|
||||
display_iq(buff, count);
|
||||
display_spectrum(buff, count);
|
||||
|
||||
if (channels) {
|
||||
for (c = 0; c < channels; c++) {
|
||||
fm_demodulate_complex(&sdr->chan[c].demod, samples[c], count, buff, sdr->modbuff_I, sdr->modbuff_Q);
|
||||
sender_t *sender = get_sender_by_empfangsfrequenz(sdr->chan[c].rx_frequency);
|
||||
if (!sender || !count)
|
||||
continue;
|
||||
double min, max, avg;
|
||||
avg = 0.0;
|
||||
for (s = 0; s < count; s++) {
|
||||
/* average the square length of vector */
|
||||
avg += sdr->modbuff_I[s] * sdr->modbuff_I[s] + sdr->modbuff_Q[s] * sdr->modbuff_Q[s];
|
||||
}
|
||||
avg = sqrt(avg /(double)count); /* RMS */
|
||||
avg = log10(avg) * 20;
|
||||
display_measurements_update(sdr->chan[c].dmp_rf_level, avg, 0.0);
|
||||
rf_level_db[c] = avg;
|
||||
min = 0.0;
|
||||
max = 0.0;
|
||||
avg = 0.0;
|
||||
for (s = 0; s < count; s++) {
|
||||
avg += samples[c][s];
|
||||
if (s == 0 || samples[c][s] > max)
|
||||
max = samples[c][s];
|
||||
if (s == 0 || samples[c][s] < min)
|
||||
min = samples[c][s];
|
||||
}
|
||||
avg /= (double)count;
|
||||
display_measurements_update(sdr->chan[c].dmp_freq_offset, avg / 1000.0, 0.0);
|
||||
/* use half min and max, because we want the deviation above/below (+-) center frequency. */
|
||||
display_measurements_update(sdr->chan[c].dmp_deviation, min / 2.0 / 1000.0, max / 2.0 / 1000.0);
|
||||
}
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
/* how much do we need to send (in audio sample duration) to get the target delay (latspl) */
|
||||
int sdr_get_tosend(void *inst, int latspl)
|
||||
{
|
||||
sdr_t *sdr = (sdr_t *)inst;
|
||||
int count = 0;
|
||||
|
||||
#ifdef HAVE_UHD
|
||||
if (sdr_config->uhd)
|
||||
count = uhd_get_tosend(latspl * sdr->oversample);
|
||||
#endif
|
||||
#ifdef HAVE_SOAPY
|
||||
if (sdr_config->soapy)
|
||||
count = soapy_get_tosend(latspl * sdr->oversample);
|
||||
#endif
|
||||
if (count < 0)
|
||||
return count;
|
||||
count /= sdr->oversample;
|
||||
|
||||
if (sdr->threads) {
|
||||
/* substract what we have in write buffer, because this is not jent sent to the SDR */
|
||||
int fill;
|
||||
|
||||
fill = (sdr->thread_write.in - sdr->thread_write.out + sdr->thread_write.buffer_size) % sdr->thread_write.buffer_size;
|
||||
count -= fill / 2;
|
||||
if (count < 0)
|
||||
count = 0;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user