/* * Wohlstand's OPN2 Bank File - a bank format to store OPN2 timbre data and setup * * Copyright (c) 2018 Vitaly Novichkov * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #ifndef WOPN_FILE_H #define WOPN_FILE_H #include #include #ifdef __cplusplus extern "C" { #endif #if !defined(__STDC_VERSION__) || (defined(__STDC_VERSION__) && (__STDC_VERSION__ < 199901L)) \ || defined(__STRICT_ANSI__) || !defined(__cplusplus) typedef signed char int8_t; typedef unsigned char uint8_t; typedef signed short int int16_t; typedef unsigned short int uint16_t; #endif /* Volume scaling model implemented in the libOPNMIDI */ typedef enum WOPN_VolumeModel { WOPN_VM_Generic = 0 } WOPN_VolumeModel; typedef enum WOPN_InstrumentFlags { /* Is pseudo eight-operator (two 4-operator voices) instrument */ WOPN_Ins_Pseudo8op = 0x01, /* Is a blank instrument entry */ WOPN_Ins_IsBlank = 0x02, /* Mask of the flags range */ WOPN_Ins_ALL_MASK = 0x03 } WOPN_InstrumentFlags; /* Error codes */ typedef enum WOPN_ErrorCodes { WOPN_ERR_OK = 0, /* Magic number is not maching */ WOPN_ERR_BAD_MAGIC, /* Too short file */ WOPN_ERR_UNEXPECTED_ENDING, /* Zero banks count */ WOPN_ERR_INVALID_BANKS_COUNT, /* Version of file is newer than supported by current version of library */ WOPN_ERR_NEWER_VERSION, /* Out of memory */ WOPN_ERR_OUT_OF_MEMORY, /* Given null pointer memory data */ WOPN_ERR_NULL_POINTER } WOPN_ErrorCodes; /* OPN2 Oerators data */ typedef struct WOPNOperator { /* Detune and frequency multiplication register data */ uint8_t dtfm_30; /* Total level register data */ uint8_t level_40; /* Rate scale and attack register data */ uint8_t rsatk_50; /* Amplitude modulation enable and Decay-1 register data */ uint8_t amdecay1_60; /* Decay-2 register data */ uint8_t decay2_70; /* Sustain and Release register data */ uint8_t susrel_80; /* SSG-EG register data */ uint8_t ssgeg_90; } WOPNOperator; /* Instrument entry */ typedef struct WOPNInstrument { /* Title of the instrument */ char inst_name[34]; /* MIDI note key (half-tone) offset for an instrument (or a first voice in pseudo-4-op mode) */ int16_t note_offset; /* Reserved */ int8_t midi_velocity_offset; /* Percussion MIDI base tone number at which this drum will be played */ uint8_t percussion_key_number; /* Enum WOPN_InstrumentFlags */ uint8_t inst_flags; /* Feedback and Algorithm register data */ uint8_t fbalg; /* LFO Sensitivity register data */ uint8_t lfosens; /* Operators register data */ WOPNOperator operators[4]; /* Millisecond delay of sounding while key is on */ uint16_t delay_on_ms; /* Millisecond delay of sounding after key off */ uint16_t delay_off_ms; } WOPNInstrument; /* Bank entry */ typedef struct WOPNBank { /* Name of bank */ char bank_name[33]; /* MIDI Bank LSB code */ uint8_t bank_midi_lsb; /* MIDI Bank MSB code */ uint8_t bank_midi_msb; /* Instruments data of this bank */ WOPNInstrument ins[128]; } WOPNBank; /* Instrument data file */ typedef struct OPNIFile { /* Version of instrument file */ uint16_t version; /* Is this a percussion instrument */ uint8_t is_drum; /* Instrument data */ WOPNInstrument inst; } OPNIFile; /* Bank data file */ typedef struct WOPNFile { /* Version of bank file */ uint16_t version; /* Count of melodic banks in this file */ uint16_t banks_count_melodic; /* Count of percussion banks in this file */ uint16_t banks_count_percussion; /* Chip global LFO enable flag and frequency register data */ uint8_t lfo_freq; /* Reserved (Enum WOPN_VolumeModel) */ uint8_t volume_model; /* dynamically allocated data Melodic banks array */ WOPNBank *banks_melodic; /* dynamically allocated data Percussive banks array */ WOPNBank *banks_percussive; } WOPNFile; /** * @brief Initialize blank WOPN data structure with allocated bank data * @param melodic_banks Count of melodic banks * @param percussive_banks Count of percussive banks * @return pointer to heap-allocated WOPN data structure or NULL when out of memory or incorrectly given banks counts */ extern WOPNFile *WOPN_Init(uint16_t melodic_banks, uint16_t percussive_banks); /** * @brief Clean up WOPN data file (all allocated bank arrays will be fried too) * @param file pointer to heap-allocated WOPN data structure */ extern void WOPN_Free(WOPNFile *file); /** * @brief Compare two bank entries * @param bank1 First bank * @param bank2 Second bank * @return 1 if banks are equal or 0 if there are different */ extern int WOPN_BanksCmp(const WOPNFile *bank1, const WOPNFile *bank2); /** * @brief Load WOPN bank file from the memory. * WOPN data structure will be allocated. (don't forget to clear it with WOPN_Free() after use!) * @param mem Pointer to memory block contains raw WOPN bank file data * @param length Length of given memory block * @param error pointer to integer to return an error code. Pass NULL if you don't want to use error codes. * @return Heap-allocated WOPN file data structure or NULL if any error has occouped */ extern WOPNFile *WOPN_LoadBankFromMem(void *mem, size_t length, int *error); /** * @brief Load WOPI instrument file from the memory. * You must allocate OPNIFile structure by yourself and give the pointer to it. * @param file Pointer to destinition OPNIFile structure to fill it with parsed data. * @param mem Pointer to memory block contains raw WOPI instrument file data * @param length Length of given memory block * @return 0 if no errors occouped, or an error code of WOPN_ErrorCodes enumeration */ extern int WOPN_LoadInstFromMem(OPNIFile *file, void *mem, size_t length); /** * @brief Calculate the size of the output memory block * @param file Heap-allocated WOPN file data structure * @param version Destinition version of the file * @return Size of the raw WOPN file data */ extern size_t WOPN_CalculateBankFileSize(WOPNFile *file, uint16_t version); /** * @brief Calculate the size of the output memory block * @param file Pointer to WOPI file data structure * @param version Destinition version of the file * @return Size of the raw WOPI file data */ extern size_t WOPN_CalculateInstFileSize(OPNIFile *file, uint16_t version); /** * @brief Write raw WOPN into given memory block * @param file Heap-allocated WOPN file data structure * @param dest_mem Destinition memory block pointer * @param length Length of destinition memory block * @param version Wanted WOPN version * @param force_gm Force GM set in saved bank file * @return Error code or 0 on success */ extern int WOPN_SaveBankToMem(WOPNFile *file, void *dest_mem, size_t length, uint16_t version, uint16_t force_gm); /** * @brief Write raw WOPI into given memory block * @param file Pointer to WOPI file data structure * @param dest_mem Destinition memory block pointer * @param length Length of destinition memory block * @param version Wanted WOPI version * @return Error code or 0 on success */ extern int WOPN_SaveInstToMem(OPNIFile *file, void *dest_mem, size_t length, uint16_t version); #ifdef __cplusplus } #endif #endif /* WOPN_FILE_H */