jens
843c6e300c
git-svn-id: http://moon:8086/svn/software/trunk/projects/JaySynth@37 b431acfa-c32f-4a4a-93f1-934dc6c82436
95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
// --------------------------------------------------------------
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// --------------------------------------------------------------
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#ifndef _ENV_H_
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#define _ENV_H_
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#include "synth_defs.h"
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#define ENV_TOL ((synth_float_t)(1E-4))
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#define ENV_KE ((synth_float_t)(1-exp(-1)))
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#define ENV_MIN_A (0.001) // s
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#define ENV_MIN_D (0.005) // s
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#define ENV_MIN_R (0.005) // s
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// --------------------------------------------------------------
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// Types
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// --------------------------------------------------------------
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enum
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{
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ENV_PARAM2_A,
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ENV_PARAM2_D,
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ENV_PARAM2_S,
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ENV_PARAM2_R,
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ENV_PARAM2_END
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};
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enum
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{
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env_state_idle = 0,
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env_state_attack,
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env_state_attack_retrigger,
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env_state_decay,
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env_state_sustain,
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env_state_release
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};
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enum
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{
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env_event_trigger = 0,
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env_event_retrigger,
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env_event_release,
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};
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typedef struct _senv_param_t
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{
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synth_float_t Ta;
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synth_float_t Td;
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synth_float_t Vs;
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synth_float_t Tr;
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} env_param_t;
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typedef struct _senvgen_t
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{
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synth_float_t fs;
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UINT32 bufsize;
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UINT32 state;
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env_param_t param;
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synth_float_t k, s, sr, sf;
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synth_float_t a_a, b_a;
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synth_float_t a_d, b_d;
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synth_float_t a_r, b_r;
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synth_float_t *pOut;
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} envgen_t;
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// --------------------------------------------------------------
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#if defined(__cplusplus)
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extern "C" {
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#endif
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// --------------------------------------------------------------
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// Exported functions
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// --------------------------------------------------------------
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void ENV_Init(envgen_t *pObj, synth_float_t fs);
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void ENV_Free(envgen_t *pObj);
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void ENV_Reset(envgen_t *pObj);
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void ENV_SetBufsize(envgen_t *pObj, UINT32 size);
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void ENV_SetFS(envgen_t *pObj, synth_float_t fs);
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void ENV_Event(envgen_t *pObj, UINT32 type);
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void ENV_Param2Set(envgen_t *pObj, UINT32 type, synth_float_t value);
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UINT32 ENV_ParamGet(envgen_t *pObj, UINT32 type);
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INT32 ENV_IsIdle(envgen_t *pObj);
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INT32 ENV_IsStage(envgen_t *pObj, UINT32 stage_num);
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synth_float_t* ENV_ProcessDataV(envgen_t *pObj, UINT32 len);
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#if defined(__cplusplus)
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}
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#endif
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// --------------------------------------------------------------
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#endif // _ENV_H_
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