PlayerControl: move attributes to struct CrossFadeSettings

src/CrossFade.cxx

@@ -87,13 +87,12 @@ mixramp_interpolate(const char *ramp_list, float required_db)
 }
 
 unsigned
-cross_fade_calc(float duration, float total_time,
-		float mixramp_db, float mixramp_delay,
+CrossFadeSettings::Calculate(float total_time,
 			     float replay_gain_db, float replay_gain_prev_db,
 			     const char *mixramp_start, const char *mixramp_prev_end,
 			     const AudioFormat af,
 			     const AudioFormat old_format,
-		unsigned max_chunks)
+			     unsigned max_chunks) const
 {
 	unsigned int chunks = 0;
 	float chunks_f;

src/CrossFade.hxx

@@ -22,8 +22,29 @@
 
 #include "Compiler.h"
 
+#include <cmath>
+
 struct AudioFormat;
-struct music_chunk;
+
+struct CrossFadeSettings {
+	/**
+	 * The configured cross fade duration [s].
+	 */
+	float duration;
+
+	float mixramp_db;
+
+	/**
+	 * The configured MixRapm delay [s].
+	 */
+	float mixramp_delay;
+
+	CrossFadeSettings()
+		:duration(0),
+		 mixramp_db(0),
+		 mixramp_delay(std::nanf(""))
+	{}
+
 
 	/**
 	 * Calculate how many music pipe chunks should be used for crossfading.
@@ -43,12 +64,12 @@ struct music_chunk;
 	 * should be disabled for this song change
 	 */
 	gcc_pure
-unsigned
-cross_fade_calc(float duration, float total_time,
-		float mixramp_db, float mixramp_delay,
+	unsigned Calculate(float total_time,
 			   float replay_gain_db, float replay_gain_prev_db,
-		const char *mixramp_start, const char *mixramp_prev_end,
+			   const char *mixramp_start,
+			   const char *mixramp_prev_end,
 			   AudioFormat af, AudioFormat old_format,
-		unsigned max_chunks);
+			   unsigned max_chunks) const;
+};
 
 #endif

src/PlayerControl.cxx

@@ -36,15 +36,6 @@ PlayerControl::PlayerControl(unsigned _buffer_chunks,
 	 error_type(PlayerError::NONE),
 	 tagged_song(nullptr),
 	 next_song(nullptr),
-	 cross_fade_seconds(0),
-	 mixramp_db(0),
-#if defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_C99_MATH_TR1)
-	 /* workaround: on MacPorts, this option is disabled on gcc47,
-	    and therefore std::nanf() is not available */
-	 mixramp_delay_seconds(nanf("")),
-#else
-	 mixramp_delay_seconds(std::nanf("")),
-#endif
 	 total_play_time(0),
 	 border_pause(false)
 {
@@ -260,7 +251,7 @@ PlayerControl::SetCrossFade(float _cross_fade_seconds)
 {
 	if (_cross_fade_seconds < 0)
 		_cross_fade_seconds = 0;
-	cross_fade_seconds = _cross_fade_seconds;
+	cross_fade.duration = _cross_fade_seconds;
 
 	idle_add(IDLE_OPTIONS);
 }
@@ -268,7 +259,7 @@ PlayerControl::SetCrossFade(float _cross_fade_seconds)
 void
 PlayerControl::SetMixRampDb(float _mixramp_db)
 {
-	mixramp_db = _mixramp_db;
+	cross_fade.mixramp_db = _mixramp_db;
 
 	idle_add(IDLE_OPTIONS);
 }
@@ -276,7 +267,7 @@ PlayerControl::SetMixRampDb(float _mixramp_db)
 void
 PlayerControl::SetMixRampDelay(float _mixramp_delay_seconds)
 {
-	mixramp_delay_seconds = _mixramp_delay_seconds;
+	cross_fade.mixramp_delay = _mixramp_delay_seconds;
 
 	idle_add(IDLE_OPTIONS);
 }

src/PlayerControl.hxx

@@ -25,6 +25,7 @@
 #include "thread/Cond.hxx"
 #include "thread/Thread.hxx"
 #include "util/Error.hxx"
+#include "CrossFade.hxx"
 
 #include <stdint.h>
 
@@ -155,9 +156,9 @@ struct PlayerControl {
 	Song *next_song;
 
 	double seek_where;
-	float cross_fade_seconds;
-	float mixramp_db;
-	float mixramp_delay_seconds;
+
+	CrossFadeSettings cross_fade;
+
 	double total_play_time;
 
 	/**
@@ -430,19 +431,19 @@ public:
 	void SetCrossFade(float cross_fade_seconds);
 
 	float GetCrossFade() const {
-		return cross_fade_seconds;
+		return cross_fade.duration;
 	}
 
 	void SetMixRampDb(float mixramp_db);
 
 	float GetMixRampDb() const {
-		return mixramp_db;
+		return cross_fade.mixramp_db;
 	}
 
 	void SetMixRampDelay(float mixramp_delay_seconds);
 
 	float GetMixRampDelay() const {
-		return mixramp_delay_seconds;
+		return cross_fade.mixramp_delay;
 	}
 
 	double GetTotalPlayTime() const {

src/PlayerThread.cxx

@@ -779,7 +779,7 @@ Player::PlayNextChunk()
 						  other_chunk->tag);
 			other_chunk->tag = nullptr;
 
-			if (std::isnan(pc.mixramp_delay_seconds)) {
+			if (std::isnan(pc.cross_fade.mixramp_delay)) {
 				chunk->mix_ratio = ((float)cross_fade_position)
 					     / cross_fade_chunks;
 			} else {
@@ -999,9 +999,7 @@ Player::Run()
 			   calculate how many chunks will be required
 			   for it */
 			cross_fade_chunks =
-				cross_fade_calc(pc.cross_fade_seconds, dc.total_time,
-						pc.mixramp_db,
-						pc.mixramp_delay_seconds,
+				pc.cross_fade.Calculate(dc.total_time,
 							dc.replay_gain_db,
 							dc.replay_gain_prev_db,
 							dc.GetMixRampStart(),