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FreeDV modulator: basic 2400A from file modulation

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This commit is contained in:
f4exb 2019-02-24 01:09:22 +01:00
parent f481a28a6c
commit e34faee3ce
4 changed files with 140 additions and 25 deletions
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2
plugins/channeltx/modfreedv/CMakeLists.txt
View File

@ -24,6 +24,7 @@ include_directories(
.
${CMAKE_CURRENT_BINARY_DIR}
${CMAKE_SOURCE_DIR}/swagger/sdrangel/code/qt5/client
${CODEC2_INCLUDE_DIR}
)
add_definitions(${QT_DEFINITIONS})
@ -43,6 +44,7 @@ target_link_libraries(modfreedv
sdrbase
sdrgui
swagger
${CODEC2_LIBRARIES}
)
target_link_libraries(modfreedv Qt5::Core Qt5::Widgets)

150
plugins/channeltx/modfreedv/freedvmod.cpp
View File

@ -27,6 +27,8 @@
#include <complex.h>
#include <algorithm>
#include "codec2/freedv_api.h"
#include "SWGChannelSettings.h"
#include "SWGChannelReport.h"
#include "SWGFreeDVModReport.h"
@ -70,7 +72,14 @@ FreeDVMod::FreeDVMod(DeviceSinkAPI *deviceAPI) :
m_sampleRate(48000),
m_levelCalcCount(0),
m_peakLevel(0.0f),
m_levelSum(0.0f)
m_levelSum(0.0f),
m_freeDV(0),
m_nSpeechSamples(0),
m_nNomModemSamples(0),
m_iSpeech(0),
m_iModem(0),
m_speechIn(0),
m_modOut(0)
{
setObjectName(m_channelId);
@ -124,6 +133,10 @@ FreeDVMod::~FreeDVMod()
delete m_SSBFilter;
delete[] m_SSBFilterBuffer;
if (m_freeDV) {
freedv_close(m_freeDV);
}
}
void FreeDVMod::pull(Sample& sample)
@ -207,38 +220,53 @@ void FreeDVMod::pullAF(Complex& sample)
sample = m_toneNco.nextIQ();
break;
case FreeDVModSettings::FreeDVModInputFile:
if (m_ifstream.is_open())
if (m_iModem >= m_nNomModemSamples)
{
if (m_ifstream.eof())
if (m_ifstream.is_open())
{
if (m_settings.m_playLoop)
{
m_ifstream.clear();
m_ifstream.seekg(0, std::ios::beg);
}
}
std::fill(m_speechIn, m_speechIn + m_nSpeechSamples, 0);
if (m_ifstream.eof())
{
ci.real(0.0f);
ci.imag(0.0f);
if (m_ifstream.eof())
{
if (m_settings.m_playLoop)
{
m_ifstream.clear();
m_ifstream.seekg(0, std::ios::beg);
}
}
if (m_ifstream.eof())
{
std::fill(m_modOut, m_modOut + m_nNomModemSamples, 0);
}
else
{
m_ifstream.read(reinterpret_cast<char*>(m_speechIn), sizeof(int16_t) * m_nSpeechSamples);
if (m_settings.m_volumeFactor != 1.0)
{
for (int i = 0; i < m_nSpeechSamples; i++) {
m_speechIn[i] *= m_settings.m_volumeFactor;
}
}
freedv_tx(m_freeDV, m_modOut, m_speechIn);
}
}
else
{
Real real;
m_ifstream.read(reinterpret_cast<char*>(&real), sizeof(Real));
ci.real(real * m_settings.m_volumeFactor);
ci.imag(0.0f);
std::fill(m_modOut, m_modOut + m_nNomModemSamples, 0);
}
m_iModem = 0;
}
else
{
ci.real(0.0f);
ci.imag(0.0f);
}
ci.real(m_modOut[m_iModem++] / (SDR_TX_SCALEF/8.0f));
ci.imag(0.0f);
break;
case FreeDVModSettings::FreeDVModInputAudio:
ci.real(((m_audioBuffer[m_audioBufferFill].l + m_audioBuffer[m_audioBufferFill].r) / 65536.0f) * m_settings.m_volumeFactor);
ci.real(((m_audioBuffer[m_audioBufferFill].l + m_audioBuffer[m_audioBufferFill].r) / (2.0 * SDR_TX_SCALEF)) * m_settings.m_volumeFactor);
ci.imag(0.0f);
break;
case FreeDVModSettings::FreeDVModInputCWTone:
@ -582,11 +610,87 @@ void FreeDVMod::applyFreeDVMode(FreeDVModSettings::FreeDVMode mode)
m_lowCutoff = FreeDVModSettings::getLowCutoff(mode);
m_settingsMutex.lock();
// baseband interpolator and filter
m_interpolatorDistanceRemain = 0;
m_interpolatorConsumed = false;
m_interpolatorDistance = (Real) m_audioSampleRate / (Real) m_outputSampleRate;
m_interpolator.create(48, m_audioSampleRate, m_hiCutoff, 3.0);
m_SSBFilter->create_filter(m_lowCutoff / m_audioSampleRate, m_hiCutoff / m_audioSampleRate);
// FreeDV object
if (m_freeDV) {
freedv_close(m_freeDV);
}
int fdv_mode = -1;
switch(mode)
{
case FreeDVModSettings::FreeDVMode700D:
fdv_mode = FREEDV_MODE_700D;
break;
case FreeDVModSettings::FreeDVMode800XA:
fdv_mode = FREEDV_MODE_800XA;
break;
case FreeDVModSettings::FreeDVMode1600:
fdv_mode = FREEDV_MODE_1600;
break;
case FreeDVModSettings::FreeDVMode2400A:
default:
fdv_mode = FREEDV_MODE_2400A;
break;
}
if (fdv_mode == FREEDV_MODE_700D)
{
struct freedv_advanced adv;
adv.interleave_frames = 1;
m_freeDV = freedv_open_advanced(fdv_mode, &adv);
}
else
{
m_freeDV = freedv_open(fdv_mode);
}
if (m_freeDV)
{
freedv_set_test_frames(m_freeDV, 0);
freedv_set_snr_squelch_thresh(m_freeDV, -100.0);
freedv_set_squelch_en(m_freeDV, 1);
freedv_set_clip(m_freeDV, 0);
freedv_set_tx_bpf(m_freeDV, 1);
freedv_set_ext_vco(m_freeDV, 0);
int nSpeechSamples = freedv_get_n_speech_samples(m_freeDV);
int nNomModemSamples = freedv_get_n_nom_modem_samples(m_freeDV);
int Fs = freedv_get_modem_sample_rate(m_freeDV);
int Rs = freedv_get_modem_symbol_rate(m_freeDV);
if ((m_speechIn) && (nSpeechSamples != m_nSpeechSamples)) {
delete[] m_speechIn;
}
if ((m_modOut) && (nNomModemSamples != m_nNomModemSamples)) {
delete[] m_modOut;
}
m_nSpeechSamples = nSpeechSamples;
m_nNomModemSamples = nNomModemSamples;
m_speechIn = new int16_t[m_nSpeechSamples];
m_modOut = new int16_t[m_nNomModemSamples];
m_iSpeech = 0;
m_iModem = 0;
qDebug() << "FreeDVMod::applyFreeDVMode:"
<< " fdv_mode: " << fdv_mode
<< " Fs: " << Fs
<< " Rs: " << Rs
<< " m_nSpeechSamples: " << m_nSpeechSamples
<< " m_nNomModemSamples: " << m_nNomModemSamples;
}
m_settingsMutex.unlock();
}

9
plugins/channeltx/modfreedv/freedvmod.h
View File

@ -43,6 +43,7 @@ class QNetworkReply;
class DeviceSinkAPI;
class ThreadedBasebandSampleSource;
class UpChannelizer;
struct freedv;
class FreeDVMod : public BasebandSampleSource, public ChannelSourceAPI {
Q_OBJECT
@ -314,6 +315,14 @@ private:
QNetworkAccessManager *m_networkManager;
QNetworkRequest m_networkRequest;
struct freedv *m_freeDV;
int m_nSpeechSamples;
int m_nNomModemSamples;
int m_iSpeech;
int m_iModem;
int16_t *m_speechIn;
int16_t *m_modOut;
static const int m_levelNbSamples;
void applyAudioSampleRate(int sampleRate);

4
plugins/channeltx/modfreedv/freedvmodsettings.cpp
View File

@ -173,7 +173,7 @@ int FreeDVModSettings::getHiCutoff(FreeDVMode freeDVMode)
switch(freeDVMode)
{
case FreeDVModSettings::FreeDVMode800XA: // C4FM NB
return 2400;
return 2400.0;
break;
case FreeDVModSettings::FreeDVMode700D: // OFDM
case FreeDVModSettings::FreeDVMode1600: // OFDM
@ -199,7 +199,7 @@ int FreeDVModSettings::getLowCutoff(FreeDVMode freeDVMode)
break;
case FreeDVModSettings::FreeDVMode2400A: // C4FM WB
default:
return 0.0;
return 50.0;
break;
}
}