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https://github.com/vsariola/sointu.git
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1ac2ad3c75
This makes all envelopes released by default, instead of attacking. Add also test to demonstrate the buggy behaviour.
101 lines
3.7 KiB
C
101 lines
3.7 KiB
C
#ifndef _SOINTU_H
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#define _SOINTU_H
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#pragma pack(push,1) // this should be fine for both Go and assembly
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typedef struct Unit {
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float State[8];
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float Ports[8];
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} Unit;
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typedef struct Voice {
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int Note;
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int Sustain;
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float Inputs[8];
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float Reserved[6];
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struct Unit Units[63];
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} Voice;
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typedef struct DelayWorkspace {
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float Buffer[65536];
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float Dcin;
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float Dcout;
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float Filtstate;
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} DelayWorkspace;
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typedef struct SynthWorkspace {
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unsigned char Curvoices[32];
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float Left;
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float Right;
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float Aux[6];
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struct Voice Voices[32];
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} SynthWorkspace;
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typedef struct SampleOffset {
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unsigned int Start;
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unsigned short LoopStart;
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unsigned short LoopLength;
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} SampleOffset;
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typedef struct Synth {
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struct SynthWorkspace SynthWrk;
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struct DelayWorkspace DelayWrks[64]; // let's keep this as 64 for now, so the delays take 16 meg. If that's too little or too much, we can change this in future.
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unsigned short DelayTimes[768];
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struct SampleOffset SampleOffsets[256];
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unsigned int RandSeed;
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unsigned int GlobalTick;
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unsigned char Commands[32 * 64];
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unsigned char Values[32 * 64 * 8];
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unsigned int Polyphony;
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unsigned int NumVoices;
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} Synth;
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#pragma pack(pop)
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#if UINTPTR_MAX == 0xffffffff // are we 32-bit?
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#if defined(__clang__) || defined(__GNUC__)
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#define CALLCONV __attribute__ ((stdcall))
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#elif defined(_WIN32)
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#define CALLCONV __stdcall // on 32-bit platforms, we just use stdcall, as all know it
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#endif
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#else // 64-bit
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#define CALLCONV // the asm will use honor honor correct x64 ABI on all 64-bit platforms
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#endif
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void CALLCONV su_load_gmdls(void);
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// int su_render(Synth* synth, float* buffer, int* samples, int* time):
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// Renders samples until 'samples' number of samples are reached or 'time' number of
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// modulated time ticks are reached, whichever happens first. 'samples' and 'time' are
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// are passed by reference as the function modifies to tell how many samples were
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// actually rendered and how many time ticks were actually advanced.
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//
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// Parameters:
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// synth pointer to the synthesizer used. RandSeed should be > 0 e.g. 1
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// buffer audio sample buffer, L R L R ...
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// samples pointer to the maximum number of samples to be rendered.
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// buffer should have a length of 2 * maxsamples as the audio
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// is stereo.
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// time maximum modulated time rendered.
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//
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// The value referred by samples is changed to contain the actual number of samples rendered
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// Similarly, the value referred by time is changed to contain the number of time ticks advanced.
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// If samples_out == samples_in, then is must be that time_in <= time_out.
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// If samples_out < samples_in, then time_out >= time_in. Note that it could happen that
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// time_out > time_in, as it is modulated and the time could advance by 2 or more, so the loop
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// exit condition would fire when the current time is already past time_in
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//
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// Returns an error code, which is actually just masked version of the FPU Status Word
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// On a succesful run, the return value should be 0
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// Error code bits:
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// bit 0 FPU invalid operation (stack over/underflow OR invalid arithmetic e.g. NaNs)
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// bit 2 Divide by zero occurred
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// bit 6 Stack overflow or underflow occurred
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// bits 11-13 The top pointer of the fpu stack. Any other value than 0 indicates that some values were left on the stack.
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int CALLCONV su_render(Synth* synth, float* buffer, int* samples, int* time);
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#define SU_ADVANCE_ID 0
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{{- range $index, $element := .Instructions}}
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#define {{printf "su_%v_id" $element | upper | printf "%-20v"}}{{add1 $index | mul 2}}
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{{- end}}
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#endif // _SOINTU_H
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