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MMDVM
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Add incoming network data buffer

This commit is contained in:
Geoffrey Merck 2020-05-09 07:57:45 +02:00
parent c84dbd02e5
commit 0e2a83bc7b
2 changed files with 14 additions and 9 deletions
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22
FM.cpp
View File

@ -51,10 +51,11 @@ m_useCOS(true),
m_cosInvert(false),
m_rfAudioBoost(1U),
m_extAudioBoost(1U),
m_downsampler(128U),//Size might need adjustement
m_downsampler(1200U),// 100 ms of audio
m_extEnabled(false),
m_rxLevel(1),
m_outputRB(2400U) // 100ms of audio
m_outputRB(2400U), // 100ms of audio
m_incomingNetworkRB(2400U) //100ms of Audio
{
}
@ -656,14 +657,11 @@ void CFM::beginRelaying()
uint8_t CFM::getSpace() const
{
// The amount of free space for receiving external audio, in bytes.
return 0U;
return m_incomingNetworkRB.getSpace();
}
uint8_t CFM::writeData(const uint8_t* data, uint8_t length)
{
q15_t samples[170U];
uint8_t nSamples = 0U;
for (uint8_t i = 0U; i < length; i += 3U) {
uint16_t sample1 = 0U;
uint16_t sample2 = 0U;
@ -679,9 +677,15 @@ uint8_t CFM::writeData(const uint8_t* data, uint8_t length)
sample2 = uint16_t(pack & MASK);
sample1 = uint16_t(pack >> 12);
// Convert from uint16_t (0 - +4095) to Q15 (-2048 - +2047)
samples[nSamples++] = q15_t(sample1) - 2048;
samples[nSamples++] = q15_t(sample2) - 2048;
// Convert from uint16_t (0 - +4095) to Q15 (-2048 - +2047).
// Incoming data has sample rate 8kHz, just add 2 empty samples after
// every incoming sample to upsample to 24kHz
m_incomingNetworkRB.put(q15_t(sample1) - 2048);
m_incomingNetworkRB.put(0);
m_incomingNetworkRB.put(0);
m_incomingNetworkRB.put(q15_t(sample2) - 2048);
m_incomingNetworkRB.put(0);
m_incomingNetworkRB.put(0);
}
// Received audio is now in Q15 format in samples, with length nSamples.

1
FM.h
View File

@ -96,6 +96,7 @@ private:
bool m_extEnabled;
q15_t m_rxLevel;
CFMRB m_outputRB;
CFMRB m_incomingNetworkRB;
void stateMachine(bool validRFSignal, bool validExtSignal);
void listeningState(bool validRFSignal, bool validExtSignal);