mirror of
https://github.com/AlexandreRouma/SDRPlusPlus.git
synced 2024-12-25 18:38:30 +01:00
Added decimation
This commit is contained in:
Ryzerth
parent
ffed602246
commit
e62351c206
@ -47,13 +47,15 @@ namespace core {
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GLFWwindow* window;
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void setInputSampleRate(double samplerate) {
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sigpath::signalPath.sourceSampleRate = samplerate;
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double effectiveSr = samplerate / ((double)(1 << sigpath::signalPath.decimation));
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// NOTE: Zoom controls won't work
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spdlog::info("New DSP samplerate: {0}", samplerate);
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gui::waterfall.setBandwidth(samplerate);
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spdlog::info("New DSP samplerate: {0} (source samplerate is {1})", effectiveSr, samplerate);
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gui::waterfall.setBandwidth(effectiveSr);
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gui::waterfall.setViewOffset(0);
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gui::waterfall.setViewBandwidth(samplerate);
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sigpath::signalPath.setSampleRate(samplerate);
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gui::mainWindow.setViewBandwidthSlider(samplerate);
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gui::waterfall.setViewBandwidth(effectiveSr);
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sigpath::signalPath.setSampleRate(effectiveSr);
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gui::mainWindow.setViewBandwidthSlider(effectiveSr);
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}
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};
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@ -202,6 +204,7 @@ int sdrpp_main(int argc, char *argv[]) {
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defConfig["showMenu"] = true;
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defConfig["showWaterfall"] = true;
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defConfig["source"] = "";
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defConfig["decimationPower"] = 0;
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defConfig["streams"]["Radio"]["muted"] = false;
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defConfig["streams"]["Radio"]["sink"] = "Audio";
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108
core/src/dsp/decimation.h
Normal file
108
core/src/dsp/decimation.h
Normal file
@ -0,0 +1,108 @@
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#pragma once
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#include <dsp/block.h>
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#include <dsp/stream.h>
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#include <dsp/types.h>
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#include <dsp/window.h>
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namespace dsp {
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template <class T>
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class HalfDecimator : public generic_block<HalfDecimator<T>> {
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public:
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HalfDecimator() {}
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HalfDecimator(stream<T>* in, dsp::filter_window::generic_window* window) { init(in, window); }
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~HalfDecimator() {
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if (!generic_block<HalfDecimator<T>>::_block_init) { return; }
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generic_block<HalfDecimator<T>>::stop();
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volk_free(buffer);
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volk_free(taps);
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generic_block<HalfDecimator<T>>::_block_init = false;
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}
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void init(stream<T>* in, dsp::filter_window::generic_window* window) {
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_in = in;
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tapCount = window->getTapCount();
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taps = (float*)volk_malloc(tapCount * sizeof(float), volk_get_alignment());
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window->createTaps(taps, tapCount);
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buffer = (T*)volk_malloc(STREAM_BUFFER_SIZE * sizeof(T) * 2, volk_get_alignment());
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bufStart = &buffer[tapCount];
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generic_block<HalfDecimator<T>>::registerInput(_in);
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generic_block<HalfDecimator<T>>::registerOutput(&out);
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generic_block<HalfDecimator<T>>::_block_init = true;
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}
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void setInput(stream<T>* in) {
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assert(generic_block<HalfDecimator<T>>::_block_init);
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std::lock_guard<std::mutex> lck(generic_block<HalfDecimator<T>>::ctrlMtx);
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generic_block<HalfDecimator<T>>::tempStop();
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generic_block<HalfDecimator<T>>::unregisterInput(_in);
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_in = in;
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generic_block<HalfDecimator<T>>::registerInput(_in);
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generic_block<HalfDecimator<T>>::tempStart();
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}
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void updateWindow(dsp::filter_window::generic_window* window) {
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assert(generic_block<HalfDecimator<T>>::_block_init);
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std::lock_guard<std::mutex> lck(generic_block<HalfDecimator<T>>::ctrlMtx);
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_window = window;
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volk_free(taps);
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tapCount = window->getTapCount();
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taps = (float*)volk_malloc(tapCount * sizeof(float), volk_get_alignment());
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bufStart = &buffer[tapCount];
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window->createTaps(taps, tapCount);
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}
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int run() {
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int count = _in->read();
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if (count < 0) { return -1; }
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generic_block<HalfDecimator<T>>::ctrlMtx.lock();
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memcpy(bufStart, _in->readBuf, count * sizeof(T));
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_in->flush();
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int inIndex = _inIndex;
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int outIndex = 0;
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if constexpr (std::is_same_v<T, float>) {
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while (inIndex < count) {
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volk_32f_x2_dot_prod_32f((float*)&out.writeBuf[outIndex], (float*)&buffer[inIndex+1], taps, tapCount);
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inIndex += 2;
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outIndex++;
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}
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}
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if constexpr (std::is_same_v<T, complex_t>) {
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while (inIndex < count) {
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volk_32fc_32f_dot_prod_32fc((lv_32fc_t*)&out.writeBuf[outIndex], (lv_32fc_t*)&buffer[inIndex+1], taps, tapCount);
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inIndex += 2;
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outIndex++;
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}
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}
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_inIndex = inIndex - count;
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if (!out.swap(outIndex)) { return -1; }
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memmove(buffer, &buffer[count], tapCount * sizeof(T));
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generic_block<HalfDecimator<T>>::ctrlMtx.unlock();
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return count;
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}
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stream<T> out;
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private:
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stream<T>* _in;
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dsp::filter_window::generic_window* _window;
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T* bufStart;
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T* buffer;
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int tapCount;
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float* taps;
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int _inIndex = 0;
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};
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}
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@ -11,6 +11,7 @@ namespace sourecmenu {
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int sourceId = 0;
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double customOffset = 0.0;
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double effectiveOffset = 0.0;
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int decimationPower = 0;
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EventHandler<std::string> sourceRegisteredHandler;
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EventHandler<std::string> sourceUnregisterHandler;
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@ -39,6 +40,14 @@ namespace sourecmenu {
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"Ku LNB (9750MHz)\0"
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"Ku LNB (10700MHz)\0";
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const char* decimationStages = "None\0"
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"2\0"
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"4\0"
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"8\0"
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"16\0"
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"32\0"
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"64\0";
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void updateOffset() {
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if (offsetMode == OFFSET_MODE_CUSTOM) { effectiveOffset = customOffset; }
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else if (offsetMode == OFFSET_MODE_SPYVERTER) { effectiveOffset = 120000000; } // 120MHz Up-conversion
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@ -113,10 +122,12 @@ namespace sourecmenu {
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std::string selected = core::configManager.conf["source"];
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customOffset = core::configManager.conf["offset"];
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offsetMode = core::configManager.conf["offsetMode"];
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decimationPower = core::configManager.conf["decimationPower"];
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updateOffset();
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refreshSources();
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selectSource(selected);
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sigpath::signalPath.setDecimation(decimationPower);
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sourceRegisteredHandler.handler = onSourceRegistered;
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sourceUnregisterHandler.handler = onSourceUnregister;
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@ -130,8 +141,9 @@ namespace sourecmenu {
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void draw(void* ctx) {
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float itemWidth = ImGui::GetContentRegionAvailWidth();
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bool running = gui::mainWindow.sdrIsRunning();
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if (gui::mainWindow.sdrIsRunning()) { style::beginDisabled(); }
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if (running) { style::beginDisabled(); }
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ImGui::SetNextItemWidth(itemWidth);
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if (ImGui::Combo("##source", &sourceId, sourceNamesTxt.c_str())) {
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@ -141,7 +153,7 @@ namespace sourecmenu {
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core::configManager.release(true);
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}
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if (gui::mainWindow.sdrIsRunning()) { style::endDisabled(); }
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if (running) { style::endDisabled(); }
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sigpath::sourceManager.showSelectedMenu();
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@ -171,5 +183,17 @@ namespace sourecmenu {
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ImGui::InputDouble("##freq_offset", &effectiveOffset, 1.0, 100.0);
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style::endDisabled();
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}
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if (running) { style::beginDisabled(); }
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ImGui::Text("Decimation");
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ImGui::SameLine();
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ImGui::SetNextItemWidth(itemWidth - ImGui::GetCursorPosX());
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if (ImGui::Combo("##source_decim", &decimationPower, decimationStages)) {
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sigpath::signalPath.setDecimation(decimationPower);
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core::configManager.acquire();
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core::configManager.conf["decimationPower"] = decimationPower;
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core::configManager.release(true);
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}
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if (running) { style::endDisabled(); }
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}
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}
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@ -1,4 +1,5 @@
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#include <signal_path/dsp.h>
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#include <core.h>
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SignalPath::SignalPath() {
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@ -6,10 +7,13 @@ SignalPath::SignalPath() {
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void SignalPath::init(uint64_t sampleRate, int fftRate, int fftSize, dsp::stream<dsp::complex_t>* input, dsp::complex_t* fftBuffer, void fftHandler(dsp::complex_t*,int,void*), void* fftHandlerCtx) {
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this->sampleRate = sampleRate;
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this->sourceSampleRate = sampleRate;
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this->fftRate = fftRate;
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this->fftSize = fftSize;
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inputBlockSize = sampleRate / 200.0f;
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halfBandWindow.init(1000000, 200000, 4000000);
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// split.init(input);
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inputBuffer.init(input);
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split.init(&inputBuffer.out);
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@ -47,17 +51,25 @@ double SignalPath::getSampleRate() {
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}
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void SignalPath::start() {
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for (auto& decimator : decimators) {
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decimator->start();
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}
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inputBuffer.start();
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split.start();
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reshape.start();
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fftHandlerSink.start();
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running = true;
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}
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void SignalPath::stop() {
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for (auto& decimator : decimators) {
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decimator->stop();
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}
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inputBuffer.stop();
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split.stop();
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reshape.stop();
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fftHandlerSink.stop();
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running = false;
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}
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dsp::VFO* SignalPath::addVFO(std::string name, double outSampleRate, double bandwidth, double offset) {
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@ -87,7 +99,6 @@ void SignalPath::removeVFO(std::string name) {
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}
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void SignalPath::setInput(dsp::stream<dsp::complex_t>* input) {
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// split.setInput(input);
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inputBuffer.setInput(input);
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}
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@ -120,4 +131,38 @@ void SignalPath::stopFFT() {
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void SignalPath::setBuffering(bool enabled) {
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inputBuffer.bypass = !enabled;
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}
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void SignalPath::setDecimation(int dec) {
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decimation = dec;
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// Stop existing decimators
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if (!decimators.empty()) {
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for (auto& decimator : decimators) {
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decimator->stop();
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delete decimator;
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}
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}
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decimators.clear();
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// If no decimation, reconnect
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if (!dec) {
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split.setInput(&inputBuffer.out);
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core::setInputSampleRate(sourceSampleRate);
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return;
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}
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// Create new decimators
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if (running) { split.stop(); }
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for (int i = 0; i < dec; i++) {
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dsp::HalfDecimator<dsp::complex_t>* decimator = new dsp::HalfDecimator<dsp::complex_t>((i == 0) ? &inputBuffer.out : &decimators[i-1]->out, &halfBandWindow);
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if (running) { decimator->start(); }
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// TODO: ONLY start if running
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decimators.push_back(decimator);
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}
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split.setInput(&decimators[decimators.size()-1]->out);
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if (running) { split.start(); }
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// Update the DSP sample rate
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core::setInputSampleRate(sourceSampleRate);
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}
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@ -3,6 +3,7 @@
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#include <dsp/vfo.h>
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#include <map>
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#include <dsp/sink.h>
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#include <dsp/decimation.h>
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class SignalPath {
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public:
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@ -21,8 +22,11 @@ public:
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void startFFT();
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void stopFFT();
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void setBuffering(bool enabled);
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void setDecimation(int dec);
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dsp::SampleFrameBuffer<dsp::complex_t> inputBuffer;
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double sourceSampleRate = 0;
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int decimation = 0;
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private:
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struct VFO_t {
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@ -39,10 +43,13 @@ private:
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// VFO
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std::map<std::string, VFO_t> vfos;
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std::vector<dsp::HalfDecimator<dsp::complex_t>*> decimators;
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dsp::filter_window::BlackmanWindow halfBandWindow;
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double sampleRate;
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double fftRate;
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int fftSize;
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int inputBlockSize;
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bool bufferingEnabled = false;
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bool running = false;
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};
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