userrevfx.h

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/*
    BSD 3-Clause License
 
    Copyright (c) 2018, KORG INC.
    All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:
 
    * Redistributions of source code must retain the above copyright notice, this
      list of conditions and the following disclaimer.
 
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
 
    * Neither the name of the copyright holder nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.
 
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
//*/
 
#ifndef __userrevfx_h
#define __userrevfx_h
 
#include <stdint.h>
 
#include "fx_api.h"
#include "userprg.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define __sdram __attribute__((section(".sdram")))
 
  typedef enum {
    k_user_revfx_param_time = 0,
    k_user_revfx_param_depth,
    k_user_revfx_param_reserved0,
    k_user_revfx_param_shift_depth,
    k_num_user_revfx_param_id
  } user_revfx_param_id_t;
 
  typedef void (*UserRevFXFuncEntry)(uint32_t platform, uint32_t api);
  typedef void (*UserRevFXFuncInit)(uint32_t platform, uint32_t api);
  typedef void (*UserRevFXFuncProcess)(float *xn, uint32_t frames);
  typedef void (*UserRevFXSuspend)(void);
  typedef void (*UserRevFXResume)(void);
  typedef void (*UserRevFXFuncParam)(uint8_t index, int32_t value);
  typedef void (*UserRevFXFuncDummy)(void);
 
#pragma pack(push, 1)
  typedef struct user_revfx_hook_table {
    uint8_t              magic[4];
    uint32_t             api;
    uint8_t              platform;
    uint8_t              reserved0[7];
    
    UserRevFXFuncInit    func_entry;
    UserRevFXFuncProcess func_process;
    UserRevFXSuspend     func_suspend;
    UserRevFXResume      func_resume;
    UserRevFXFuncParam   func_param;
    UserRevFXFuncDummy   reserved1[7];
  } user_revfx_hook_table_t;
#pragma pack(pop)
 
#pragma pack(push, 1)
  typedef struct user_revfx_data {
    user_prg_header_t       header;
    user_revfx_hook_table_t hooks;
    // code bytes following
  } user_revfx_data_t;
#pragma pack(pop)
 
#define REVFX_INIT    __attribute__((used)) _hook_init 
#define REVFX_PROCESS __attribute__((used)) _hook_process
#define REVFX_SUSPEND __attribute__((used)) _hook_suspend
#define REVFX_RESUME  __attribute__((used)) _hook_resume
#define REVFX_PARAM   __attribute__((used)) _hook_param
 
  void _entry(uint32_t platform, uint32_t api);
 
  void _hook_init(uint32_t platform, uint32_t api);
 
  void _hook_process(float *xn, uint32_t frames);
 
  void _hook_suspend(void);
 
  void _hook_resume(void);
 
  void _hook_param(uint8_t index, int32_t value);
 
#ifdef __cplusplus
} // extern "C"
#endif
  
#endif // __userrevfx_h