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wasm support

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This commit is contained in:
Erik Bročko
2026-03-25 19:50:21 +01:00
parent 548db30cdd
commit ab52775ba7
12 changed files with 541 additions and 57 deletions
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83
src/ui/Application.cpp
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@@ -5,7 +5,12 @@
#include <imgui_impl_sdl2.h>
#include <imgui_impl_opengl3.h>
#ifdef __EMSCRIPTEN__
#include <emscripten.h>
#include <GLES2/gl2.h>
#else
#include <GL/gl.h>
#endif
#include <cstdio>
#include <cstring>
#include <algorithm>
@@ -44,8 +49,14 @@ bool Application::init(int argc, char** argv) {
return false;
}
#ifdef __EMSCRIPTEN__
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#else
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
#endif
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
window_ = SDL_CreateWindow("Baudline Spectrum Analyzer",
@@ -75,7 +86,11 @@ bool Application::init(int argc, char** argv) {
style.GrabRounding = 2.0f;
ImGui_ImplSDL2_InitForOpenGL(window_, glContext_);
#ifdef __EMSCRIPTEN__
ImGui_ImplOpenGL3_Init("#version 100");
#else
ImGui_ImplOpenGL3_Init("#version 120");
#endif
// Enumerate audio devices
paDevices_ = MiniAudioSource::listInputDevices();
@@ -110,32 +125,48 @@ bool Application::init(int argc, char** argv) {
return true;
}
void Application::run() {
while (running_) {
SDL_Event event;
while (SDL_PollEvent(&event)) {
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
running_ = false;
if (event.type == SDL_KEYDOWN) {
auto key = event.key.keysym.sym;
if (key == SDLK_ESCAPE) running_ = false;
if (key == SDLK_SPACE) paused_ = !paused_;
if (key == SDLK_p) {
int pkCh = std::clamp(waterfallChannel_, 0,
analyzer_.numSpectra() - 1);
cursors_.snapToPeak(analyzer_.channelSpectrum(pkCh),
settings_.sampleRate, settings_.isIQ,
settings_.fftSize);
}
void Application::mainLoopStep() {
SDL_Event event;
while (SDL_PollEvent(&event)) {
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
running_ = false;
if (event.type == SDL_KEYDOWN) {
auto key = event.key.keysym.sym;
#ifndef __EMSCRIPTEN__
if (key == SDLK_ESCAPE) running_ = false;
#endif
if (key == SDLK_SPACE) paused_ = !paused_;
if (key == SDLK_p) {
int pkCh = std::clamp(waterfallChannel_, 0,
analyzer_.numSpectra() - 1);
cursors_.snapToPeak(analyzer_.channelSpectrum(pkCh),
settings_.sampleRate, settings_.isIQ,
settings_.fftSize);
}
}
if (!paused_)
processAudio();
render();
}
if (!paused_)
processAudio();
render();
}
#ifdef __EMSCRIPTEN__
static void emMainLoop(void* arg) {
static_cast<Application*>(arg)->mainLoopStep();
}
#endif
void Application::run() {
#ifdef __EMSCRIPTEN__
emscripten_set_main_loop_arg(emMainLoop, this, 0, true);
#else
while (running_) {
mainLoopStep();
}
#endif
}
void Application::shutdown() {
@@ -1310,6 +1341,9 @@ void Application::renderMathPanel() {
}
void Application::loadConfig() {
#ifdef __EMSCRIPTEN__
return; // No filesystem config on WASM
#endif
config_.load();
fftSizeIdx_ = config_.getInt("fft_size_idx", fftSizeIdx_);
overlapPct_ = config_.getFloat("overlap_pct", overlapPct_);
@@ -1351,6 +1385,9 @@ void Application::loadConfig() {
}
void Application::saveConfig() const {
#ifdef __EMSCRIPTEN__
return;
#endif
Config cfg;
cfg.setInt("fft_size_idx", fftSizeIdx_);
cfg.setFloat("overlap_pct", overlapPct_);