vae_voice_filter.hpp

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#ifndef _VAE_VOICE_FILTER
#define _VAE_VOICE_FILTER
 
#include "../vae_types.hpp"
#include "../vae_config.hpp"
#include <limits>
 
namespace vae { namespace core {
    /**
     * @brief Additional data needed for filtered voices.
     * Allows lowpass and highpass filtering as well as variable
     * playback speeds.
     */
    struct VoiceFilter {
        Real lowpass = 0.0; ///< Lowpasses the signal as the value approaches 1
        Real highpass = 0.0;    ///< Highpasses the signal as the value approaches 1
        Real speed = 1.0;       ///< Playback speed, will alter pitch
        Real timeFract = 0.0;   ///< Fractional time component for interpolation
        Sample lowpassScratch[StaticConfig::MaxChannels];       ///< Last sample per channel for IIR filter
        Sample highpassScratch[StaticConfig::MaxChannels];  ///< Last sample per channel for IIR filter
 
        VoiceFilter() {
            for (Size i = 0; i < StaticConfig::MaxChannels; i++) {
                lowpassScratch[i]  = 0;
                highpassScratch[i] = 0;
            }
        }
    };
 
    constexpr int _VAE_VOICE_FILTER_FILTERED_SIZE = sizeof(VoiceFilter);
 
} } // core::vae
 
#endif // _VAE_VOICE_FILTER