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common: Add pre and de emphasis, if the radio does not support it

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Connect to the oscillator of the transmitter - good girl!
You need to enable pre emphasis in this case.

Connect to the discriminator of the receiver - good boy!
You need to enable de emphasis in this case.
This commit is contained in:
Andreas Eversberg
2016-04-23 18:50:11 +02:00
parent 5062628e52
commit 4356c93afa
20 changed files with 256 additions and 19 deletions
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4
src/anetz/anetz.c
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@@ -137,7 +137,7 @@ static void anetz_timeout(struct timer *timer);
static void anetz_go_idle(anetz_t *anetz);
/* Create transceiver instance and link to a list. */
int anetz_create(const char *sounddev, int samplerate, const char *write_wave, const char *read_wave, int kanal, int loopback, double loss_volume)
int anetz_create(const char *sounddev, int samplerate, int pre_emphasis, int de_emphasis, const char *write_wave, const char *read_wave, int kanal, int loopback, double loss_volume)
{
anetz_t *anetz;
int rc;
@@ -156,7 +156,7 @@ int anetz_create(const char *sounddev, int samplerate, const char *write_wave, c
PDEBUG(DANETZ, DEBUG_DEBUG, "Creating 'A-Netz' instance for 'Kanal' = %d (sample rate %d).\n", kanal, samplerate);
/* init general part of transceiver */
rc = sender_create(&anetz->sender, sounddev, samplerate, write_wave, read_wave, kanal, loopback, loss_volume, -1);
rc = sender_create(&anetz->sender, sounddev, samplerate, pre_emphasis, de_emphasis, write_wave, read_wave, kanal, loopback, loss_volume, -1);
if (rc < 0) {
PDEBUG(DANETZ, DEBUG_ERROR, "Failed to init 'Sender' processing!\n");
goto error;