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Add support for AM to libmobile and libsdr

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This commit is contained in:
Andreas Eversberg
2019-12-05 17:24:30 +01:00
parent c2f14834e5
commit 150a77b69d
26 changed files with 121 additions and 52 deletions
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25
src/libmobile/sender.c
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@@ -183,36 +183,38 @@ int sender_open_audio(int latspl)
channels++;
}
double tx_f[channels], rx_f[channels], paging_frequency = 0.0;
int am[channels];
for (i = 0, inst = master; inst; i++, inst = inst->slave) {
tx_f[i] = inst->sendefrequenz;
rx_f[i] = inst->empfangsfrequenz;
am[i] = inst->am;
if (inst->ruffrequenz)
paging_frequency = inst->ruffrequenz;
}
if (master->write_rx_wave) {
rc = wave_create_record(&master->wave_rx_rec, master->write_rx_wave, master->samplerate, channels, master->max_deviation);
rc = wave_create_record(&master->wave_rx_rec, master->write_rx_wave, master->samplerate, channels, (master->max_deviation) ?: 1.0);
if (rc < 0) {
PDEBUG(DSENDER, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
return rc;
}
}
if (master->write_tx_wave) {
rc = wave_create_record(&master->wave_tx_rec, master->write_tx_wave, master->samplerate, channels, master->max_deviation);
rc = wave_create_record(&master->wave_tx_rec, master->write_tx_wave, master->samplerate, channels, (master->max_deviation) ?: 1.0);
if (rc < 0) {
PDEBUG(DSENDER, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
return rc;
}
}
if (master->read_rx_wave) {
rc = wave_create_playback(&master->wave_rx_play, master->read_rx_wave, &master->samplerate, &channels, master->max_deviation);
rc = wave_create_playback(&master->wave_rx_play, master->read_rx_wave, &master->samplerate, &channels, (master->max_deviation) ?: 1.0);
if (rc < 0) {
PDEBUG(DSENDER, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
return rc;
}
}
if (master->read_tx_wave) {
rc = wave_create_playback(&master->wave_tx_play, master->read_tx_wave, &master->samplerate, &channels, master->max_deviation);
rc = wave_create_playback(&master->wave_tx_play, master->read_tx_wave, &master->samplerate, &channels, (master->max_deviation) ?: 1.0);
if (rc < 0) {
PDEBUG(DSENDER, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
return rc;
@@ -220,7 +222,7 @@ int sender_open_audio(int latspl)
}
/* open device */
master->audio = master->audio_open(master->audiodev, tx_f, rx_f, channels, paging_frequency, master->samplerate, latspl, master->max_deviation, master->max_modulation);
master->audio = master->audio_open(master->audiodev, tx_f, rx_f, am, channels, paging_frequency, master->samplerate, latspl, (master->max_deviation) ?: 1.0, master->max_modulation, master->modulation_index);
if (!master->audio) {
PDEBUG(DSENDER, DEBUG_ERROR, "No device for transceiver!\n");
return -EIO;
@@ -293,6 +295,19 @@ void sender_set_fm(sender_t *sender, double max_deviation, double max_modulation
PDEBUG_CHAN(DSENDER, DEBUG_DEBUG, "Deviation at speech level: %.1f kHz\n", speech_deviation / 1000.0);
}
/* set amplitude modulation and parameters */
void sender_set_am(sender_t *sender, double max_modulation, double speech_level, double max_display, double modulation_index)
{
sender->am = 1;
sender->max_deviation = 0;
sender->max_modulation = max_modulation;
sender->speech_deviation = speech_level;
sender->max_display = max_display;
sender->modulation_index = modulation_index;
PDEBUG_CHAN(DSENDER, DEBUG_DEBUG, "Modulation degree: %.0f %%, Maximum modulation: %.1f kHz\n", modulation_index / 100.0, max_modulation / 1000.0);
}
static void gain_samples(sample_t *samples, int length, double gain)
{
int i;