fix(zlp::controller): update window and resize working space

Author: zsliu98

source/PluginProcessor.cpp

@@ -205,6 +205,7 @@ void PluginProcessor::processBlockInternal(juce::AudioBuffer<float>& buffer, con
     if (buffer.getNumSamples() == 0) {
         return; // ignore empty blocks
     }
+    controller_.prepareBuffer();
     const auto ext_side = controller_.getExtSide();
     const auto num_samples = static_cast<size_t>(buffer.getNumSamples());
     switch (channel_layout_) {

source/zlp/controller.cpp

@@ -531,6 +531,7 @@ namespace zlp {
 
     void Controller::resizeWorkingSpace() {
         fft_size_ = static_cast<size_t>(1) << fft_order_;
+        fft_hop_size_ = fft_size_ / 4;
         num_bin_ = fft_size_ / 2 + 1;
         num_bin_effective_ = fft_size_ / 2;
         ws_.resize(num_bin_effective_);
@@ -539,6 +540,33 @@ namespace zlp {
         window2_.resize(fft_size_);
         window_bypass_.resize(fft_size_);
 
+        zldsp::fft::createPeriodicHanning(std::span{window1_.data(), window1_.size()}, 2.f / static_cast<float>(fft_size_));
+        const auto v_window2_scale = hn::Set(d, static_cast<float>(fft_size_) / 3.f);
+        const auto v_bypass_scale = hn::Set(d, 4.f / 3.f);
+        for (size_t i = 0; i < fft_size_; i += lanes) {
+            const auto v_window1 = hn::Load(d, window1_.data() + i);
+            const auto v_window2 = hn::Mul(v_window1, v_window2_scale);
+            hn::Store(v_window2, d, window2_.data() + i);
+            const auto v_window_bypass = hn::Mul(hn::Mul(v_window1, v_window1), v_bypass_scale);
+            hn::Store(v_window_bypass, d, window_bypass_.data() + i);
+        }
+
+        for (auto& fifo : input_fifos_) {
+            fifo.resize(fft_size_);
+        }
+        for (auto& fifo : output_fifos_) {
+            fifo.resize(fft_size_);
+        }
+        for (auto& fifo : fft_ins_) {
+            fifo.resize(fft_size_);
+        }
+        for (auto& fifo : fft_out_reals_) {
+            fifo.resize(num_bin_);
+        }
+        for (auto& fifo : fft_out_imags_) {
+            fifo.resize(num_bin_);
+        }
+
         for (auto& response : spec_response_) {
             response.prepare(fft_size_);
         }