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MMDVM
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Handle incoming audio

This commit is contained in:
Geoffrey Merck 2020-05-09 08:23:02 +02:00
parent ff3e6feeb6
commit e91c4417cb
1 changed files with 15 additions and 13 deletions
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28
FM.cpp
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@ -73,35 +73,38 @@ void CFM::samples(bool cos, const q15_t* samples, uint8_t length)
uint8_t i = 0U;
for (; i < length; i++) {
// ARMv7-M has hardware integer division
q15_t currentSample = q15_t((q31_t(samples[i]) << 8) / m_rxLevel);
q15_t currentRFSample = q15_t((q31_t(samples[i]) << 8) / m_rxLevel);
uint8_t ctcssState = m_ctcssRX.process(currentRFSample);
uint8_t ctcssState = m_ctcssRX.process(currentSample);
q15_t currentExtSample;
bool inputExt = m_inputExtRB.get(currentExtSample);//always consume the external input data so it does not overflow
if (CTCSS_NOT_READY(ctcssState) && m_modemState != STATE_FM) {
if ((!inputExt || CTCSS_NOT_READY(ctcssState)) && m_modemState != STATE_FM) {
//Not enough samples to determine if you have CTCSS, just carry on.
continue;
} else if (CTCSS_READY(ctcssState) && m_modemState != STATE_FM) {
} else if ((inputExt || CTCSS_READY(ctcssState)) && m_modemState != STATE_FM) {
//we had enough samples for CTCSS and we are in some other mode than FM
bool validCTCSS = CTCSS_VALID(ctcssState);
// XXX Need to have somewhere to get the ext audio state
stateMachine(validCTCSS && cos, false);
stateMachine(validCTCSS && cos, inputExt);
if (m_modemState != STATE_FM)
continue;
} else if (CTCSS_READY(ctcssState) && m_modemState == STATE_FM) {
} else if ((inputExt || CTCSS_READY(ctcssState)) && m_modemState == STATE_FM) {
//We had enough samples for CTCSS and we are in FM mode, trigger the state machine
bool validCTCSS = CTCSS_VALID(ctcssState);
// XXX Need to have somewhere to get the ext audio state
stateMachine(validCTCSS && cos, false);
stateMachine(validCTCSS && cos, inputExt);
if (m_modemState != STATE_FM)
break;
} else if (CTCSS_NOT_READY(ctcssState) && m_modemState == STATE_FM && i == length - 1) {
} else if ((inputExt || CTCSS_NOT_READY(ctcssState)) && m_modemState == STATE_FM && i == length - 1) {
//Not enough samples for CTCSS but we already are in FM, trigger the state machine
//but do not trigger the state machine on every single sample, save CPU!
bool validCTCSS = CTCSS_VALID(ctcssState);
// XXX Need to have somewhere to get the ext audio state
stateMachine(validCTCSS && cos, false);
stateMachine(validCTCSS && cos, inputExt);
}
q15_t currentSample = currentRFSample;
if(m_state == FS_RELAYING_EXT || m_state == FS_KERCHUNK_EXT)
currentSample = currentExtSample;
// Only let RF audio through when relaying RF audio
if (m_state == FS_RELAYING_RF || m_state == FS_KERCHUNK_RF) {
if (m_extEnabled)
@ -110,7 +113,6 @@ void CFM::samples(bool cos, const q15_t* samples, uint8_t length)
currentSample = m_blanking.process(currentSample);
currentSample *= m_rfAudioBoost;
} else if (m_state == FS_RELAYING_EXT || m_state == FS_KERCHUNK_EXT) {
// XXX Where do we receive the ext audio?
currentSample = m_blanking.process(currentSample);
currentSample *= m_extAudioBoost;
} else {