BT411/engine/MUNGA_L4/L4AUDLVL.h

#pragma once

#include "..\munga\audlvl.h"
#include "l4audhdw.h"
#include "openal/al.h"

enum SampleChannel
{
	CHANNEL_LEFT,
	CHANNEL_RIGHT,
	CHANNEL_CENTER
};

enum SampleLoop
{
	LoopAtWill,		//Will play once or loop as desired
	ForceStatic,	//Plays only once even if looped
	LoopAlways,		//Ramp up and then down
	SampleLoopMax
};

struct SAMPLEINFO
{
	int bufferIndex;
	bool implemented;
	const char *file;
	SampleChannel chan;
	SampleLoop loop;
	// (task #50, AUDIO_FIDELITY F1/F13) full-zone metadata from the SF2 banks:
	// the authored MIDI note SELECTS zones by [keyLo,keyHi]; loop regions are
	// sub-ranges in sample frames (AL_SOFT_loop_points); releaseSec is the
	// authored releaseVolEnv fade applied on Stop instead of an instant cut.
	int keyLo;
	int keyHi;
	int loopStart;
	int loopEnd;
	float releaseSec;
};

// AllExplosion (bank2 p125) authors 25 layered zones -- the largest preset.
const int MAX_PRESET_SAMPLES = 25;

// Gitea #12: the SourceSet OpenAL-source array must hold one source per zone,
// so its capacity must cover the largest preset.  If MAX_PRESET_SAMPLES ever
// grows past the SourceSet array, channel acquisition would overflow the heap
// (the death-crash class) -- lock the two together at compile time.
static_assert(MAX_PRESET_SAMPLES <= AUDIO_SOURCESET_CAPACITY,
	"SourceSet.sources[] too small for MAX_PRESET_SAMPLES voices (Gitea #12)");

struct PRESETINFO
{
	int sampleNum;
	SAMPLEINFO samples[MAX_PRESET_SAMPLES];
	bool is3d;
};

extern PRESETINFO allPresets[2][128];

bool PRESET_isImplemented(int bank, int preset);
int PRESET_getNumSamples(int bank, int preset);
SAMPLEINFO PRESET_getSampleInfo(int bank, int preset, int sampleInd);
void PRESET_setBufferIndex(int bank, int preset, int sampleInd, int index);

// (task #50, AUDIO_FIDELITY F13) authored release fades: StopNote registers a
// dB-linear gain ramp instead of cutting; AudioHead::Execute services them.
void PRESET_serviceReleaseFades(float elapsed_seconds);

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PatchLevelOfDetail ~~~~~~~~~~~~~~~~~~~~~~~~~~

typedef MIDIValue	SBKPatchID;
typedef MIDIValue SBKBankID;

class PatchLevelOfDetail:
	public AudioLevelOfDetail
{
public:
	//
	//-----------------------------------------------------------------------
	// Construction, Destruction, Testing
	//-----------------------------------------------------------------------
	//
	PatchLevelOfDetail(PlugStream *stream);
	~PatchLevelOfDetail();

	void PlayNote(SourceSet sourceSet, int note);
	void StopNote(SourceSet sourceSet);

	Logical
		TestInstance() const;

	virtual AudioVoiceCount
		GetVoiceCount()
			{return PRESET_getNumSamples(bankID,patchID);}

	// (task #50) expose the authored bank/patch so the game-side footstep
	// intensity send can identify footstep sources precisely.
	int GetBankID()  const { return (int)bankID; }
	int GetPatchID() const { return (int)patchID; }

	//
	//-----------------------------------------------------------------------
	// BuildFromPage
	//-----------------------------------------------------------------------
	//
	static void
		BuildFromPage(
			PlugStream *stream,
			NameList *name_list,
			ClassID class_ID,
			ObjectID object_ID
		);

	//
	//-----------------------------------------------------------------------
	// Accessors
	//-----------------------------------------------------------------------
	//
	void
		SetupPatch(SourceSet sourceSet, int note);

	MIDINRPNValue
		GetMaxMIDIFilterCutoff()
			{return maxMIDIFilterCutoff;}

private:
	//
	//-----------------------------------------------------------------------
	// Private data
	//-----------------------------------------------------------------------
	//
	SBKBankID
		bankID;
	SBKPatchID
		patchID;
	MIDINRPNValue
		maxMIDIFilterCutoff;

	#ifdef LAB_ONLY
		int 
			setupCount;
	#endif

	//
	// Keep table of created patchs to verify that duplicates
	// are not created
	//
	#if DEBUG_LEVEL>0
		static TableOf<PatchLevelOfDetail*, unsigned int>
			patchTableSocket;
	#endif
};

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PatchResource ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class PatchResource:
	public AudioResource
{
public:
	//
	//-----------------------------------------------------------------------
	// Construction, Destruction, Testing
	//-----------------------------------------------------------------------
	//
	PatchResource(PlugStream *stream);
	~PatchResource();

	void PlayNote(SourceSet sourceSet, int note);
	void StopNote(SourceSet sourceSet);

	Logical
		TestInstance() const;

	//
	//-----------------------------------------------------------------------
	// BuildFromPage
	//-----------------------------------------------------------------------
	//
	static void
		BuildFromPage(
     	PlugStream *stream,
			NameList *name_list,
			ClassID class_ID,
			ObjectID object_ID
     );

	//
	//-----------------------------------------------------------------------
	// Accessors
	//-----------------------------------------------------------------------
	//
	void
		SetupPatch(SourceSet sourceSet, int note);

	MIDINRPNValue
		GetMaxMIDIFilterCutoff();

	// (task #50) authored bank/patch pass-throughs (the LOD accessor is
	// protected on AudioResource) -- zone metadata lookups at the source layer.
	int GetBankID();
	int GetPatchID();
};