williamp/osmocom-analog
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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/nmt/nmt.c
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@@ -283,7 +283,7 @@ static void nmt_timeout(struct timer *timer);
static void nmt_go_idle(nmt_t *nmt);
/* Create transceiver instance and link to a list. */
int nmt_create(const char *sounddev, int samplerate, const char *write_wave, const char *read_wave, int channel, enum nmt_chan_type chan_type, uint8_t ms_power, uint8_t traffic_area, uint8_t area_no, int compander, int supervisory, int loopback)
int nmt_create(const char *sounddev, int samplerate, int pre_emphasis, int de_emphasis, const char *write_wave, const char *read_wave, int channel, enum nmt_chan_type chan_type, uint8_t ms_power, uint8_t traffic_area, uint8_t area_no, int compander, int supervisory, int loopback)
{
nmt_t *nmt;
int rc;
@@ -324,7 +324,7 @@ int nmt_create(const char *sounddev, int samplerate, const char *write_wave, con
PDEBUG(DNMT, DEBUG_DEBUG, "Creating 'NMT' instance for channel = %d (sample rate %d).\n", channel, samplerate);
/* init general part of transceiver */
rc = sender_create(&nmt->sender, sounddev, samplerate, write_wave, read_wave, channel, loopback, 0, -1);
rc = sender_create(&nmt->sender, sounddev, samplerate, pre_emphasis, de_emphasis, write_wave, read_wave, channel, loopback, 0, -1);
if (rc < 0) {
PDEBUG(DNMT, DEBUG_ERROR, "Failed to init transceiver process!\n");
goto error;