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An equalizer design for Windows with Direct2D
CodeProject article: https://www.codeproject.com/Articles/5253995/The-Equalizer-Design-Graphic-and-Parametric-Win32 Have fun with it, I use it with my Turbo Play (https://www.turboirc.com/tp).
Uses:
- My XML for serialization: https://github.com/WindowsNT/xml
- My syncs for playback: https://github.com/WindowsNT/mt
- DSPFilters for Low/High cut of the parametric equalizer: https://github.com/vinniefalco/DSPFilters
- SNDFilter for biquad peaking filters in parametric/graphic equalizer: https://github.com/voidqk/sndfilter
Includes a VS 2019 solution to test with a simple MP3 player. Run the app, press Space and load an MP3. Use EQ::PARAMETRICEQ for parametric equalizer and EQ::GRAPHICEQ for graphic.
Features:
- Graphic equalizer for 10,20,31 bands with some presets, using Peaking biquad filters.
- Parametric equalizer with a low/high cut or low/high shelf filter (Choose from Butterworth, Chebyshev I,II, Elliptic) and unlimited peaking filters with Q.
- Draw the response with Direct2D
- Keyboard shortcuts for activation, order, ripple
- Mouse movement for dB, frequency, and wheel for Q
class EQ
{
virtual void Paint(ID2D1Factory*fact, ID2D1RenderTarget* r, RECT rc) = 0;
virtual void LeftDown(WPARAM ww, LPARAM ll) = 0;
virtual void RightDown(WPARAM ww, LPARAM ll) = 0;
virtual void LeftUp(WPARAM ww, LPARAM ll) = 0;
virtual void MouseMove(WPARAM ww, LPARAM ll) = 0;
virtual void MouseWheel(WPARAM ww, LPARAM ll) = 0;
virtual void KeyDown(WPARAM ww, LPARAM ll) = 0;
virtual void LeftDoubleClick(WPARAM ww,LPARAM ll) = 0;
virtual void Ser(XML3::XMLElement& e) = 0;
virtual void Unser(XML3::XMLElement& e) = 0;
virtual void Prepare(int SR) = 0;
virtual void Run(int SR, float* in, int ns, float* out) = 0; // Single channel
virtual bool Run2(int SR, int nch,float** in, int ns, float** out) = 0; // Multiple channel (ToDo)
virtual void Build(int SR) = 0; // Create the filters
};
// Callbacks
class EQCALLBACK
{
public:
virtual void RedrawRequest(EQ* pr) = 0; // Called when the equalizer needs to redraw
virtual void Dirty(EQ* e,bool) = 0; // Called when the equalizer has changed
};