Sound: honor initNoInterp

src/Sound/SoundManager.cpp

@@ -84,6 +84,7 @@ enum ApplyParametersMask
 	kApplyParameters_PanAndGain		= 1 << 0,
 	kApplyParameters_Pitch			= 1 << 1,
 	kApplyParameters_Loop			= 1 << 2,
+	kApplyParameters_Interpolation	= 1 << 3,
 	kApplyParameters_All            = 0xFFFFFFFF
 };
 
@@ -107,6 +108,7 @@ public:
 	Byte playbackNote;
 	double pitchMult;
 	bool loop;
+	bool interpolate;
 
 	bool temporaryPause = false;
 
@@ -120,6 +122,7 @@ public:
 		, playbackNote(kMiddleC)
 		, pitchMult(1.0)
 		, loop(false)
+		, interpolate(false)
 	{
 		macChannel->channelImpl = (Ptr) this;
 
@@ -170,6 +173,12 @@ public:
 		{
 			source.SetInterpolation(interpolate);
 		}
+
+		// Interpolation
+		if (mask & kApplyParameters_Loop)
+		{
+			source.SetLoop(loop);
+		}
 	}
 
 	ChannelImpl* GetPrev() const
@@ -332,7 +341,9 @@ OSErr SndNewChannel(SndChannelPtr* macChanPtr, short synth, long init, SndCallBa
 	// Set up
 
 	(**macChanPtr).callBack = userRoutine;
-	new ChannelImpl(*macChanPtr, transferMacChannelOwnership);
+	auto channelImpl = new ChannelImpl(*macChanPtr, transferMacChannelOwnership);
+
+	channelImpl->interpolate = !(init & initNoInterp);
 
 	//---------------------------
 	// Done

src/Sound/cmixer.cpp

@@ -45,8 +45,6 @@ using namespace cmixer;
 
 #define BUFFER_MASK (BUFFER_SIZE - 1)
 
-static constexpr bool INTERPOLATED_RESAMPLING = false;
-
 //-----------------------------------------------------------------------------
 // Global mixer
 
@@ -229,6 +227,7 @@ void Source::ClearPrivate()
 	nextfill	= 0;
 	loop		= false;
 	rewind		= true;
+	interpolate = false;
 	// DON'T touch active. The source may still be in gMixer!
 	gain		= 0;
 	pan			= 0;
@@ -345,7 +344,7 @@ void Source::Process(int len)
 			}
 			this->position += count * FX_UNIT;
 		}
-		else if (INTERPOLATED_RESAMPLING)
+		else if (interpolate)
 		{
 			// Resample audio (with linear interpolation) and add to buffer
 			for (int i = 0; i < count; i++)
@@ -432,6 +431,11 @@ void Source::SetLoop(bool newLoop)
 	loop = newLoop;
 }
 
+void Source::SetInterpolation(bool newInterpolation)
+{
+	interpolate = newInterpolation;
+}
+
 void Source::Play()
 {
 	gMixer.Lock();

src/Sound/cmixer.h

@@ -55,6 +55,7 @@ namespace cmixer
 		bool loop;                      // Whether the source will loop when `end` is reached
 		bool rewind;                    // Whether the source will rewind before playing
 		bool active;                    // Whether the source is part of `sources` list
+		bool interpolate;               // Interpolated resampling when played back at a non-native rate
 		double gain;                    // Gain set by `cm_set_gain()`
 		double pan;                     // Pan set by `cm_set_pan()`
 		std::function<void()> onComplete;        // Callback
@@ -99,6 +100,8 @@ namespace cmixer
 
 		void SetLoop(bool loop);
 
+		void SetInterpolation(bool interpolation);
+
 		void Play();
 
 		void Pause();