Initial commit

1 files changed, 77 insertions, 0 deletions

diff --git a/src/live.cpp b/src/live.cpp
new file mode 100644
index 0000000..037b97c
--- /dev/null
+++ b/src/live.cpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2020-2021 Vasile Vilvoiu <vasi.vilvoiu@gmail.com>
+ *
+ * specgram is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See LICENSE for details.
+ */
+#include "live.hpp"
+
+#include <cassert>
+#include <cstring>
+
+LiveOutput::LiveOutput(const Configuration& conf, const ColorMap& cmap, const ValueMap& vmap)
+    : configuration_(conf), renderer_(conf.GetForLive(), cmap, vmap, conf.GetCount())
+{
+    auto width = conf.IsHorizontal() ? renderer_.GetHeight() : renderer_.GetWidth();
+    auto height = conf.IsHorizontal() ? renderer_.GetWidth() : renderer_.GetHeight();
+
+    /* create non-resizable window */
+    this->window_.create(sf::VideoMode(width, height),
+                         conf.GetTitle(),
+                         sf::Style::Close);
+    this->window_.setFramerateLimit(0);
+
+    /* FFT area raw memory used to update the area texture */
+    this->fft_area_.resize(conf.GetWidth() * conf.GetCount() * 4); /* RGBA pixel array */
+}
+
+void
+LiveOutput::AddWindow(const std::vector<uint8_t>& window, const RealWindow& win_values)
+{
+    std::size_t wlen_bytes = this->configuration_.GetWidth() * 4;
+    if (window.size() != wlen_bytes) {
+        throw std::runtime_error("input window size differs from live window size");
+    }
+
+    /* scroll down one window */
+    assert(this->fft_area_.size() >= wlen_bytes);
+    std::memmove(reinterpret_cast<void *>(this->fft_area_.data() + wlen_bytes),
+                 reinterpret_cast<const void *>(this->fft_area_.data()),
+                 fft_area_.size() - wlen_bytes);
+    /* copy new window */
+    std::memcpy(reinterpret_cast<void *>(this->fft_area_.data()),
+                reinterpret_cast<const void *>(window.data()),
+                wlen_bytes);
+
+    /* update renderer */
+    this->renderer_.RenderFFTArea(this->fft_area_);
+    this->renderer_.RenderLiveFFT(win_values, window);
+
+    /* draw window */
+    this->Render();
+}
+
+bool
+LiveOutput::HandleEvents()
+{
+    sf::Event event;
+    while (this->window_.pollEvent(event)) {
+        if (event.type == sf::Event::Closed)
+            this->window_.close();
+    }
+    return this->window_.isOpen();
+}
+
+void
+LiveOutput::Render()
+{
+    sf::Texture canvas_texture = this->renderer_.GetCanvas();
+    sf::Sprite canvas_sprite(canvas_texture);
+    if (this->configuration_.IsHorizontal()) {
+        canvas_sprite.setRotation(-90.0f);
+        canvas_sprite.setPosition(0.0f, canvas_texture.getSize().x);
+    }
+
+    this->window_.draw(canvas_sprite);
+    this->window_.display();
+}
\ No newline at end of file