Move the R128 and correlation measurements into AudioMixer.

[nageru] / audio_mixer.h

diff --git a/audio_mixer.h b/audio_mixer.h
index 6e1d5a9458fbb1ef3d808d7cae162591a2ae878d..75b468a120f7d1f39aa293009e9b76153ae4e9a3 100644 (file)
--- a/audio_mixer.h
+++ b/audio_mixer.h
@@ -7,9 +7,6 @@
 // all together into one final audio signal.
 //
 // All operations on AudioMixer (except destruction) are thread-safe.
-//
-// TODO: There might be more audio stuff that should be moved here
-// from Mixer.
 
 #include <math.h>
 #include <stdint.h>
@@ -19,11 +16,14 @@
 #include <mutex>
 #include <set>
 #include <vector>
+#include <zita-resampler/resampler.h>
 
 #include "alsa_input.h"
 #include "bmusb/bmusb.h"
+#include "correlation_measurer.h"
 #include "db.h"
 #include "defs.h"
+#include "ebu_r128_proc.h"
 #include "filter.h"
 #include "resampling_queue.h"
 #include "stereocompressor.h"
@@ -77,6 +77,7 @@ public:
        AudioMixer(unsigned num_cards);
        ~AudioMixer();
        void reset_resampler(DeviceSpec device_spec);
+       void reset_meters();
 
        // Add audio (or silence) to the given device's queue. Can return false if
        // the lock wasn't successfully taken; if so, you should simply try again.
@@ -88,9 +89,6 @@ public:
 
        std::vector<float> get_output(double pts, unsigned num_samples, ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy);
 
-       // See comments inside get_output().
-       void set_current_loudness(double level_lufs) { loudness_lufs = level_lufs; }
-
        void set_fader_volume(unsigned bus_index, float level_db) { fader_volume_db[bus_index] = level_db; }
        std::map<DeviceSpec, DeviceInfo> get_devices() const;
        void set_name(DeviceSpec device_spec, const std::string &name);
@@ -203,6 +201,15 @@ public:
                return final_makeup_gain_auto;
        }
 
+       typedef std::function<void(float level_lufs, float peak_db,
+                                  float global_level_lufs, float range_low_lufs, float range_high_lufs,
+                                  float gain_staging_db, float final_makeup_gain_db,
+                                  float correlation)> audio_level_callback_t;
+       void set_audio_level_callback(audio_level_callback_t callback)
+       {
+               audio_level_callback = callback;
+       }
+
 private:
        struct AudioDevice {
                std::unique_ptr<ResamplingQueue> resampling_queue;
@@ -221,6 +228,8 @@ private:
        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 update_meters(const std::vector<float> &samples);
+       void send_audio_level_callback();
 
        unsigned num_cards;
 
@@ -245,8 +254,6 @@ private:
        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.
 
-       std::atomic<float> loudness_lufs{ref_level_lufs};
-
        StereoCompressor limiter;
        std::atomic<float> limiter_threshold_dbfs{ref_level_dbfs + 4.0f};   // 4 dB.
        std::atomic<bool> limiter_enabled{true};
@@ -259,6 +266,13 @@ private:
 
        InputMapping input_mapping;  // Under audio_mutex.
        std::atomic<float> fader_volume_db[MAX_BUSES] {{ 0.0f }};
+
+       audio_level_callback_t audio_level_callback = nullptr;
+       mutable std::mutex audio_measure_mutex;
+       Ebu_r128_proc r128;  // Under audio_measure_mutex.
+       CorrelationMeasurer correlation;  // Under audio_measure_mutex.
+       Resampler peak_resampler;  // Under audio_measure_mutex.
+       std::atomic<float> peak{0.0f};
 };
 
 #endif  // !defined(_AUDIO_MIXER_H)