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Buffer output after adding some initial silence.

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This commit is contained in:
Jonathan Naylor 2020-05-08 15:48:03 +01:00
parent 5ca9313db8
commit 9b0fed975c
7 changed files with 226 additions and 12 deletions
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43
FM.cpp
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@ -44,12 +44,13 @@ m_blanking(),
m_useCOS(true),
m_cosInvert(false),
m_rfAudioBoost(1U),
m_downsampler(128),//Size might need adjustement
m_rxLevel(1)
m_downsampler(128U),//Size might need adjustement
m_rxLevel(1),
m_outputRB(2400U) // 100ms of audio
{
}
void CFM::samples(bool cos, q15_t* samples, uint8_t length)
void CFM::samples(bool cos, const q15_t* samples, uint8_t length)
{
if (m_useCOS) {
if (m_cosInvert)
@ -115,15 +116,32 @@ void CFM::samples(bool cos, q15_t* samples, uint8_t length)
currentSample += m_ctcssTX.getAudio();
samples[i] = currentSample;
if (m_modemState == STATE_FM)
m_outputRB.put(currentSample);
}
if (m_modemState == STATE_FM)
io.write(STATE_FM, samples, i);//only write the actual number of processed samples to IO
}
void CFM::process()
{
if (m_modemState != STATE_FM)
return;
uint16_t length = m_outputRB.getData();
if (length == 0U)
return;
uint16_t space = io.getSpace();
if (space == 0U)
return;
if (space < length)
length = space;
for (uint16_t i = 0U; i < length; i++) {
q15_t sample;
m_outputRB.get(sample);
io.write(STATE_FM, &sample, 1U);
}
}
void CFM::reset()
@ -141,6 +159,8 @@ void CFM::reset()
m_rfAck.stop();
m_callsign.stop();
m_timeoutTone.stop();
m_outputRB.reset();
}
uint8_t CFM::setCallsign(const char* callsign, uint8_t speed, uint16_t frequency, uint8_t time, uint8_t holdoff, uint8_t highLevel, uint8_t lowLevel, bool callsignAtStart, bool callsignAtEnd, bool callsignAtLatch)
@ -263,6 +283,8 @@ void CFM::listeningState(bool validSignal)
sendCallsign();
}
insertSilence(50U);
beginRelaying();
m_callsignTimer.start();
@ -438,3 +460,10 @@ void CFM::beginRelaying()
m_ackMinTimer.start();
}
void CFM::insertSilence(uint16_t ms)
{
uint32_t nSamples = ms * 24U;
for (uint32_t i = 0U; i < nSamples; i++)
m_outputRB.put(0);
}