X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=mixer.h;h=ffae67a6e398687640c155ae12d8dd81c33f11e0;hb=4b4f249d5221a6456e0a3b725ff6463f14c24699;hp=6d0cbce1593b6da92c4f426668d948c982683921;hpb=196392c483a9cbf7fd7b572d9242aa283031453f;p=nageru

diff --git a/mixer.h b/mixer.h
index 6d0cbce..ffae67a 100644
--- a/mixer.h
+++ b/mixer.h
@@ -103,7 +103,7 @@ public:
 
 	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;
@@ -169,6 +169,37 @@ public:
 		compressor_enabled = enabled;
 	}
 
+	void set_gain_staging_db(float gain_db)
+	{
+		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()
+	{
+		should_cut = true;
+	}
+
 	void reset_meters();
 
 private:
@@ -252,10 +283,11 @@ private:
 	std::thread mixer_thread;
 	std::thread audio_thread;
 	std::atomic<bool> should_quit{false};
+	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};
@@ -264,10 +296,12 @@ private:
 	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;
+	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.
@@ -276,6 +310,9 @@ private:
 	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 {