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Update Kraken.cpp

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- Fixed minor issues and added IQ data copying to blah2 buffers

- (This is superfluous . read next comment) I haven't checked the gain validation routine, so I copied the valid values as a comment. I guess this will need separate validation somewhere.

- I have also enabled auto gain after seeing it enabled in kraken's own firmware.
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sdn-ninja 2024-06-12 23:58:42 +01:00 committed by GitHub
parent a2c383841b
commit d3f1ca6041
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1 changed files with 23 additions and 19 deletions
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42
src/capture/kraken/Kraken.cpp
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@ -11,7 +11,7 @@ Kraken::Kraken(std::string _type, uint32_t _fc, uint32_t _fs,
: Source(_type, _fc, _fs, _path, _saveIq)
{
// convert gain to tenths of dB
for (int i = 0; i <= _gain.size(); i++)
for (int i = 0; i < _gain.size(); i++)
{
gain.push_back(static_cast<int>(_gain[i]*10));
channelIndex.push_back(i);
@ -33,7 +33,9 @@ Kraken::Kraken(std::string _type, uint32_t _fc, uint32_t _fs,
check_status(status, "Failed to close device for available gains.");
// update gains to next value if invalid
for (int i = 0; i <= _gain.size(); i++)
// supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
for (int i = 0; i < _gain.size(); i++)
{
int adjustedGain = static_cast<int>(_gain[i] * 10);
auto it = std::lower_bound(validGains.begin(),
@ -54,17 +56,17 @@ void Kraken::start()
for (size_t i = 0; i < channelIndex.size(); i++)
{
std::cout << "[Kraken] Setting up channel " << i << "." << std::endl;
rtlsdr_dev_t* dev;
status = rtlsdr_open(&dev, i);
status = rtlsdr_open(&devs[i], i);
check_status(status, "Failed to open device.");
devs.push_back(dev);
status = rtlsdr_set_center_freq(devs[i], fc);
check_status(status, "Failed to set center frequency.");
status = rtlsdr_set_sample_rate(devs[i], fs);
check_status(status, "Failed to set sample rate.");
status = rtlsdr_set_dithering(devs[i], 0); // disable dither
check_status(status, "Failed to disable dithering.");
status = rtlsdr_set_tuner_gain_mode(devs[i], 1); // disable AGC
status = rtlsdr_set_tuner_gain_mode(devs[i], 0); // enable AGC
check_status(status, "Failed to disable AGC.");
status = rtlsdr_set_tuner_gain(devs[i], gain[i]);
check_status(status, "Failed to set gain.");
@ -86,11 +88,8 @@ void Kraken::stop()
void Kraken::process(IqData *buffer1, IqData *buffer2)
{
std::vector<std::thread> threads;
for (size_t i = 0; i < channelIndex.size(); i++)
{
threads.emplace_back(rtlsdr_read_async, devs[i], callback, &channelIndex, 0, 16 * 16384);
}
threads.emplace_back(rtlsdr_read_async, devs[0], callback, buffer1, 0, 16 * 16384);
threads.emplace_back(rtlsdr_read_async, devs[1], callback, buffer2, 0, 16 * 16384);
// join threads
for (auto& thread : threads) {
thread.join();
@ -99,13 +98,19 @@ void Kraken::process(IqData *buffer1, IqData *buffer2)
void Kraken::callback(unsigned char *buf, uint32_t len, void *ctx)
{
int deviceIndex = *reinterpret_cast<int*>(ctx);
// buffers[i]->lock();
// for (size_t j = 0; j < n_read; j++)
// {
// buffers[i]->push_back({buffer[j].real(), buffer[j].imag()});
// }
// buffers[i]->unlock();
IqData* buffer_blah2 = (IqData*)ctx;
int8_t* buffer_kraken = (int8_t*)buf;
buffer_blah2->lock();
for (size_t i = 0; i < len; i += 2) {
double iqi = static_cast<double>(buffer_kraken[i]);
double iqq = static_cast<double>(buffer_kraken[i + 1]);
buffer_blah2->push_back({iqi, iqq});
}
buffer_blah2->unlock();
}
void Kraken::replay(IqData *buffer1, IqData *buffer2, std::string _file, bool _loop)
@ -120,4 +125,3 @@ void Kraken::check_status(int status, std::string message)
throw std::runtime_error("[Kraken] " + message);
}
}