typedef std::function<void(float level_lufs, float peak_db,
float global_level_lufs, float range_low_lufs, float range_high_lufs,
- float auto_gain_staging_db)> audio_level_callback_t;
+ float gain_staging_db, float final_makeup_gain_db)> audio_level_callback_t;
void set_audio_level_callback(audio_level_callback_t callback)
{
audio_level_callback = callback;
compressor_enabled = enabled;
}
- void set_gainstaging_auto(bool enabled)
+ void set_gain_staging_db(float gain_db)
{
- level_compressor = enabled;
+ std::unique_lock<std::mutex> lock(compressor_mutex);
+ level_compressor_enabled = false;
+ gain_staging_db = gain_db;
+ }
+
+ void set_gain_staging_auto(bool enabled)
+ {
+ std::unique_lock<std::mutex> lock(compressor_mutex);
+ level_compressor_enabled = enabled;
+ }
+
+ void set_final_makeup_gain_db(float gain_db)
+ {
+ std::unique_lock<std::mutex> lock(compressor_mutex);
+ final_makeup_gain_auto = false;
+ final_makeup_gain = pow(10.0f, gain_db / 20.0f);
+ }
+
+ void set_final_makeup_gain_auto(bool enabled)
+ {
+ std::unique_lock<std::mutex> lock(compressor_mutex);
+ final_makeup_gain_auto = enabled;
}
void schedule_cut()
std::atomic<bool> should_cut{false};
audio_level_callback_t audio_level_callback = nullptr;
- std::mutex r128_mutex;
- Ebu_r128_proc r128; // Under r128_mutex.
+ std::mutex compressor_mutex;
+ Ebu_r128_proc r128; // Under compressor_mutex.
Resampler peak_resampler;
std::atomic<float> peak{0.0f};
std::atomic<float> locut_cutoff_hz;
// First compressor; takes us up to about -12 dBFS.
- StereoCompressor level_compressor;
- float last_gain_staging_db = 0.0f;
- std::atomic<bool> level_compressor_enabled{true};
+ 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.
- static constexpr float ref_level_dbfs = -14.0f;
+ 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.
StereoCompressor limiter;
std::atomic<float> limiter_threshold_dbfs{ref_level_dbfs + 4.0f}; // 4 dB.
std::atomic<float> compressor_threshold_dbfs{ref_level_dbfs - 12.0f}; // -12 dB.
std::atomic<bool> compressor_enabled{true};
+ 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.
+
std::unique_ptr<ALSAOutput> alsa;
struct AudioTask {