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add frequency plot

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This commit is contained in:
Clyne 2023-09-23 11:44:50 -04:00
parent 54e1e399ee
commit f41cfe8196
Signed by: clyne
GPG Key ID: 3267C8EBF3F9AFC7
5 changed files with 109 additions and 14 deletions
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3
.gitmodules vendored
View File

@ -14,3 +14,6 @@
[submodule "gui/source/ImGuiColorTextEdit"]
path = gui/source/ImGuiColorTextEdit
url = https://github.com/BalazsJako/ImGuiColorTextEdit
[submodule "gui/kissfft"]
path = gui/kissfft
url = https://github.com/mborgerding/kissfft

7
gui/Makefile
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@ -1,6 +1,8 @@
CXX = g++
CXXFILES := \
kissfft/kiss_fft.c \
kissfft/kiss_fftr.c \
source/serial/src/serial.cc \
source/imgui/backends/imgui_impl_sdl2.cpp \
source/imgui/backends/imgui_impl_opengl2.cpp \
@ -13,7 +15,8 @@ CXXFILES := \
$(wildcard source/stmdsp/*.cpp) \
$(wildcard source/*.cpp)
CXXFLAGS := -std=c++20 -O2 \
CXXFLAGS := -std=c++20 -Og -ggdb -g3 \
-Ikissfft \
-Isource -Isource/imgui -Isource/stmdsp -Isource/serial/include \
-Isource/ImGuiColorTextEdit -Isource/ImGuiFileDialog \
$(shell sdl2-config --cflags) \
@ -32,7 +35,7 @@ LDFLAGS = $(shell sdl2-config --libs) -lGL -lpthread
OUTPUT := stmdspgui
endif
OFILES := $(patsubst %.cc, %.o, $(patsubst %.cpp, %.o, $(CXXFILES)))
OFILES := $(patsubst %.c, %.o, $(patsubst %.cc, %.o, $(patsubst %.cpp, %.o, $(CXXFILES))))
all: $(OUTPUT)

1
gui/kissfft Submodule

@ -0,0 +1 @@
Subproject commit 8f47a67f595a6641c566087bf5277034be64f24d

4
gui/source/device.cpp
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@ -316,7 +316,7 @@ bool deviceConnect()
return false;
}
void deviceStart(bool logResults, bool drawSamples)
void deviceStart(bool fetchSamples)
{
if (!m_device) {
log("No device connected.");
@ -336,7 +336,7 @@ void deviceStart(bool logResults, bool drawSamples)
log("Ready.");
} else {
m_device->continuous_start();
if (drawSamples || logResults || wavOutput.valid())
if (fetchSamples || wavOutput.valid())
std::thread(drawSamplesTask, m_device).detach();
log("Running.");

108
gui/source/gui_device.cpp
View File

@ -2,7 +2,7 @@
#include "imgui.h"
#include "imgui_internal.h"
#include "ImGuiFileDialog.h"
#include "kiss_fftr.h"
#include "stmdsp.hpp"
#include <array>
@ -45,7 +45,7 @@ void deviceLoadAudioFile(const std::string& file);
void deviceLoadLogFile(const std::string& file);
void deviceSetSampleRate(unsigned int index);
void deviceSetInputDrawing(bool enabled);
void deviceStart(bool logResults, bool drawSamples);
void deviceStart(bool fetchSamples);
void deviceStartMeasurement();
void deviceUpdateDrawBufferSize(double timeframe);
std::size_t pullFromDrawQueue(
@ -57,6 +57,7 @@ static std::string sampleRatePreview = "?";
static bool measureCodeTime = false;
static bool logResults = false;
static bool drawSamples = false;
static bool drawFrequencies = false;
static bool popupRequestBuffer = false;
static bool popupRequestSiggen = false;
static bool popupRequestLog = false;
@ -74,6 +75,7 @@ void deviceRenderDisconnect()
measureCodeTime = false;
logResults = false;
drawSamples = false;
drawFrequencies = false;
}
void deviceRenderMenu()
@ -104,7 +106,7 @@ void deviceRenderMenu()
static std::string startLabel ("Start");
addMenuItem(startLabel, isConnected, [&] {
startLabel = isRunning ? "Start" : "Stop";
deviceStart(logResults, drawSamples);
deviceStart(logResults || drawSamples || drawFrequencies);
if (logResults && isRunning)
logResults = false;
});
@ -118,7 +120,8 @@ void deviceRenderMenu()
if (!isConnected || isRunning)
ImGui::PushDisabled(); // Hey, pushing disabled!
ImGui::Checkbox("Draw samples", &drawSamples);
ImGui::Checkbox("Plot over time", &drawSamples);
ImGui::Checkbox("Plot over freq.", &drawFrequencies);
if (ImGui::Checkbox("Log results...", &logResults)) {
if (logResults)
popupRequestLog = true;
@ -296,13 +299,16 @@ void deviceRenderWidgets()
void deviceRenderDraw()
{
if (drawSamples) {
static std::vector<stmdsp::dacsample_t> buffer;
static std::vector<stmdsp::dacsample_t> bufferInput;
static auto bufferCirc = CircularBuffer(buffer);
static auto bufferInputCirc = CircularBuffer(bufferInput);
static std::vector<stmdsp::dacsample_t> buffer;
static std::vector<stmdsp::dacsample_t> bufferInput;
static std::vector<kiss_fft_scalar> bufferFFTIn;
static std::vector<kiss_fft_cpx> bufferFFTOut;
static auto bufferCirc = CircularBuffer(buffer);
static auto bufferInputCirc = CircularBuffer(bufferInput);
static bool drawSamplesInput = false;
static kiss_fftr_cfg kisscfg;
static bool drawSamplesInput = false;
if (drawSamples) {
static unsigned int yMinMax = 4095;
ImGui::Begin("draw", &drawSamples);
@ -433,6 +439,88 @@ void deviceRenderDraw()
}
}
ImGui::End();
} else if (drawFrequencies) {
ImGui::Begin("draw", &drawFrequencies);
ImGui::Text("Time: %0.3f sec", drawSamplesTimeframe);
ImGui::SameLine();
if (ImGui::Button("-", {30, 0})) {
drawSamplesTimeframe = std::max(drawSamplesTimeframe / 2., 0.0078125);
deviceUpdateDrawBufferSize(drawSamplesTimeframe);
}
ImGui::SameLine();
if (ImGui::Button("+", {30, 0})) {
drawSamplesTimeframe = std::min(drawSamplesTimeframe * 2, 32.);
deviceUpdateDrawBufferSize(drawSamplesTimeframe);
}
auto newSize = pullFromDrawQueue(bufferCirc);
if (newSize > 0) {
buffer.resize(newSize);
bufferFFTIn.resize(newSize);
bufferFFTOut.resize(newSize);
bufferCirc = CircularBuffer(buffer);
pullFromDrawQueue(bufferCirc);
kiss_fftr_free(kisscfg);
kisscfg = kiss_fftr_alloc(buffer.size(), false, nullptr, nullptr);
}
std::copy(buffer.begin(), buffer.end(), bufferFFTIn.begin());
kiss_fftr(kisscfg, bufferFFTIn.data(), bufferFFTOut.data());
auto drawList = ImGui::GetWindowDrawList();
ImVec2 p0 = ImGui::GetWindowPos();
auto size = ImGui::GetWindowSize();
p0.y += 65;
size.y -= 70;
drawList->AddRectFilled(p0, {p0.x + size.x, p0.y + size.y}, IM_COL32_BLACK);
const auto lcMinor = ImGui::GetColorU32(IM_COL32(40, 40, 40, 255));
const auto lcMajor = ImGui::GetColorU32(IM_COL32(140, 140, 140, 255));
{
const float yinc = size.y / 10.f;
for (int i = 1; i < 10; ++i) {
drawList->AddLine({p0.x, p0.y + i * yinc}, {p0.x + size.x, p0.y + i * yinc}, (i % 2) ? lcMinor : lcMajor);
}
}
{
const float xinc = size.x / 10.f;
for (int i = 1; i < 10; ++i) {
drawList->AddLine({p0.x + i * xinc, p0.y}, {p0.x + i * xinc, p0.y + size.y}, (i % 2) ? lcMinor : lcMajor);
}
}
const auto Fs = m_device->get_sample_rate();
const float di = static_cast<float>(buffer.size() / 2) / size.x;
const float dx = std::ceil(size.x / static_cast<float>(buffer.size()));
ImVec2 pp = p0;
float i = 0;
while (pp.x < p0.x + size.x) {
unsigned int idx = i;
float n = std::clamp(bufferFFTOut[idx].r / Fs / 4.f, 0.f, 1.f);
i += di;
ImVec2 next (pp.x + dx, p0.y + size.y * (1 - n));
drawList->AddLine(pp, next, ImGui::GetColorU32(IM_COL32(255, 0, 0, 255)), 2.f);
pp = next;
}
const auto mouse = ImGui::GetMousePos();
if (mouse.x > p0.x && mouse.x < p0.x + size.x &&
mouse.y > p0.y && mouse.y < p0.y + size.y)
{
char buf[16];
drawList->AddLine({mouse.x, p0.y}, {mouse.x, p0.y + size.y}, IM_COL32(255, 255, 0, 255));
const std::size_t si = (mouse.x - p0.x) / size.x * Fs / 2;
snprintf(buf, sizeof(buf), " %5luHz", si);
drawList->AddText(mouse, IM_COL32(255, 0, 0, 255), buf);
}
ImGui::End();
}
}