- audio_level_callback_t audio_level_callback = nullptr;
- std::mutex compressor_mutex;
- Ebu_r128_proc r128; // Under compressor_mutex.
- CorrelationMeasurer correlation; // Under compressor_mutex.
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- Resampler peak_resampler;
- std::atomic<float> peak{0.0f};
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- StereoFilter locut; // Default cutoff 120 Hz, 24 dB/oct.
- std::atomic<float> locut_cutoff_hz;
- std::atomic<bool> locut_enabled{true};
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- // First compressor; takes us up to about -12 dBFS.
- StereoCompressor level_compressor; // Under compressor_mutex. Used to set/override gain_staging_db if <level_compressor_enabled>.
- float gain_staging_db = 0.0f; // Under compressor_mutex.
- bool level_compressor_enabled = true; // Under compressor_mutex.
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- static constexpr float ref_level_dbfs = -14.0f; // Chosen so that we end up around 0 LU in practice.
- static constexpr float ref_level_lufs = -23.0f; // 0 LU, more or less by definition.
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- StereoCompressor limiter;
- std::atomic<float> limiter_threshold_dbfs{ref_level_dbfs + 4.0f}; // 4 dB.
- std::atomic<bool> limiter_enabled{true};
- StereoCompressor compressor;
- std::atomic<float> compressor_threshold_dbfs{ref_level_dbfs - 12.0f}; // -12 dB.
- std::atomic<bool> compressor_enabled{true};
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- double final_makeup_gain = 1.0; // Under compressor_mutex. Read/write by the user. Note: Not in dB, we want the numeric precision so that we can change it slowly.
- bool final_makeup_gain_auto = true; // Under compressor_mutex.
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