williamp/osmocom-analog
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common code: Add input gain option

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This commit is contained in:
Andreas Eversberg
2016-05-06 07:00:27 +02:00
parent ba91ee82a7
commit bae12156a2
16 changed files with 80 additions and 39 deletions
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23
src/common/sender.c
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@@ -33,7 +33,7 @@ static sender_t **sender_tailp = &sender_head;
int cant_recover = 0;
/* Init transceiver instance and link to list of transceivers. */
int sender_create(sender_t *sender, int kanal, const char *sounddev, int samplerate, int cross_channels, int pre_emphasis, int de_emphasis, const char *write_wave, const char *read_wave, int loopback, double loss_volume, int use_pilot_signal)
int sender_create(sender_t *sender, int kanal, const char *sounddev, int samplerate, int cross_channels, double rx_gain, int pre_emphasis, int de_emphasis, const char *write_wave, const char *read_wave, int loopback, double loss_volume, int use_pilot_signal)
{
sender_t *master;
int rc = 0;
@@ -91,6 +91,7 @@ int sender_create(sender_t *sender, int kanal, const char *sounddev, int sampler
sender->samplerate = samplerate;
sender->cross_channels = cross_channels;
sender->rx_gain = rx_gain;
sender->pre_emphasis = pre_emphasis;
sender->de_emphasis = de_emphasis;
sender->kanal = kanal;
@@ -189,6 +190,21 @@ static void gen_pilotton(sender_t *sender, int16_t *samples, int length)
sender->pilotton_phase = phase;
}
static void gain_samples(int16_t *samples, int length, double gain)
{
int i;
int32_t sample;
for (i = 0; i < length; i++) {
sample = (int32_t)((double)(*samples) * gain);
if (sample > 32767)
sample = 32767;
else if (sample < -32768)
sample = -32768;
*samples++ = sample;
}
}
/* Handle audio streaming of one transceiver. */
static void process_sender_audio(sender_t *sender, int *quit, int latspl)
{
@@ -318,6 +334,9 @@ cant_recover:
return;
}
if (count) {
/* rx gain */
if (sender->rx_gain != 1.0)
gain_samples(samples, count, sender->rx_gain);
/* do de emphasis from radio (then write_wave/wave_read), receive audio, process echo test */
if (sender->de_emphasis)
de_emphasis(&sender->estate, samples, count);
@@ -332,6 +351,8 @@ cant_recover:
jitter_save(&sender->audio, samples, count);
/* do above for audio slave, if set */
if (slave) {
if (sender->rx_gain != 1.0)
gain_samples(slave_samples, count, slave->rx_gain);
if (slave->de_emphasis)
de_emphasis(&slave->estate, slave_samples, count);
if (slave->wave_play.fp)