unsigned num_channels;
};
+enum EQBand {
+ EQ_BAND_BASS = 0,
+ EQ_BAND_MID,
+ EQ_BAND_TREBLE,
+ NUM_EQ_BANDS
+};
+
static inline uint64_t DeviceSpec_to_key(const DeviceSpec &device_spec)
{
return (uint64_t(device_spec.type) << 32) | device_spec.index;
locut_cutoff_hz = cutoff_hz;
}
+ float get_locut_cutoff() const
+ {
+ return locut_cutoff_hz;
+ }
+
void set_locut_enabled(unsigned bus, bool enabled)
{
locut_enabled[bus] = enabled;
return locut_enabled[bus];
}
+ void set_eq(unsigned bus_index, EQBand band, float db_gain)
+ {
+ assert(band >= 0 && band < NUM_EQ_BANDS);
+ eq_level_db[bus_index][band] = db_gain;
+ }
+
+ float get_eq(unsigned bus_index, EQBand band) const
+ {
+ assert(band >= 0 && band < NUM_EQ_BANDS);
+ return eq_level_db[bus_index][band];
+ }
+
float get_limiter_threshold_dbfs() const
{
return limiter_threshold_dbfs;
return final_makeup_gain_auto;
}
+ void reset_peak(unsigned bus_index);
+
struct BusLevel {
- float loudness_lufs;
+ float current_level_dbfs[2]; // Digital peak of last frame, left and right.
+ float peak_level_dbfs[2]; // Digital peak with hold, left and right.
+ float historic_peak_dbfs;
float gain_staging_db;
+ float compressor_attenuation_db; // A positive number; 0.0 for no attenuation.
};
typedef std::function<void(float level_lufs, float peak_db,
void reset_resampler_mutex_held(DeviceSpec device_spec);
void reset_alsa_mutex_held(DeviceSpec device_spec);
std::map<DeviceSpec, DeviceInfo> get_devices_mutex_held() const;
+ void apply_eq(unsigned bus_index, std::vector<float> *samples_bus);
void update_meters(const std::vector<float> &samples);
+ void add_bus_to_master(unsigned bus_index, const std::vector<float> &samples_bus, std::vector<float> *samples_out);
void measure_bus_levels(unsigned bus_index, const std::vector<float> &left, const std::vector<float> &right);
void send_audio_level_callback();
AudioDevice alsa_inputs[MAX_ALSA_CARDS]; // Under audio_mutex.
std::vector<ALSAInput::Device> available_alsa_cards;
- std::atomic<float> locut_cutoff_hz;
+ std::atomic<float> locut_cutoff_hz{120};
StereoFilter locut[MAX_BUSES]; // Default cutoff 120 Hz, 24 dB/oct.
std::atomic<bool> locut_enabled[MAX_BUSES];
+ StereoFilter eq[MAX_BUSES][NUM_EQ_BANDS]; // The one for EQBand::MID isn't actually used (see comments in apply_eq()).
// First compressor; takes us up to about -12 dBFS.
mutable std::mutex compressor_mutex;
std::atomic<float> compressor_threshold_dbfs[MAX_BUSES];
std::atomic<bool> compressor_enabled[MAX_BUSES];
+ // Note: The values here are not in dB.
+ struct PeakHistory {
+ float current_level = 0.0f; // Peak of the last frame.
+ float historic_peak = 0.0f; // Highest peak since last reset; no falloff.
+ float current_peak = 0.0f; // Current peak of the peak meter.
+ float last_peak = 0.0f;
+ float age_seconds = 0.0f; // Time since "last_peak" was set.
+ };
+ PeakHistory peak_history[MAX_BUSES][2]; // Separate for each channel. Under audio_mutex.
+
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.
InputMapping input_mapping; // Under audio_mutex.
std::atomic<float> fader_volume_db[MAX_BUSES] {{ 0.0f }};
+ float last_fader_volume_db[MAX_BUSES] { 0.0f }; // Under audio_mutex.
+ std::atomic<float> eq_level_db[MAX_BUSES][NUM_EQ_BANDS] {{{ 0.0f }}};
audio_level_callback_t audio_level_callback = nullptr;
mutable std::mutex audio_measure_mutex;
CorrelationMeasurer correlation; // Under audio_measure_mutex.
Resampler peak_resampler; // Under audio_measure_mutex.
std::atomic<float> peak{0.0f};
-
- // Under audio_measure_mutex. Note that Ebu_r128_proc has a broken
- // copy constructor (it uses the default, but holds arrays),
- // so we can't just use raw Ebu_r128_proc elements, but need to use
- // unique_ptrs.
- std::vector<std::unique_ptr<Ebu_r128_proc>> bus_r128;
};
#endif // !defined(_AUDIO_MIXER_H)