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zmusic/thirdparty/opnmidi/wopn/wopn_file.c
Christoph Oelckers a4eae42ec5 - initial commit
2020-01-02 17:52:30 +01:00

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/*
* Wohlstand's OPN2 Bank File - a bank format to store OPN2 timbre data and setup
*
* Copyright (c) 2018 Vitaly Novichkov <admin@wohlnet.ru>
*
* 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.
*/
#include "wopn_file.h"
#include <string.h>
#include <stdlib.h>
static const char *wopn2_magic1 = "WOPN2-BANK\0";
static const char *wopn2_magic2 = "WOPN2-B2NK\0";
static const char *opni_magic1 = "WOPN2-INST\0";
static const char *opni_magic2 = "WOPN2-IN2T\0";
static const uint16_t wopn_latest_version = 2;
enum
{
WOPN_INST_SIZE_V1 = 65,
WOPN_INST_SIZE_V2 = 69
};
static uint16_t toUint16LE(const uint8_t *arr)
{
uint16_t num = arr[0];
num |= ((arr[1] << 8) & 0xFF00);
return num;
}
static uint16_t toUint16BE(const uint8_t *arr)
{
uint16_t num = arr[1];
num |= ((arr[0] << 8) & 0xFF00);
return num;
}
static int16_t toSint16BE(const uint8_t *arr)
{
int16_t num = *(const int8_t *)(&arr[0]);
num *= 1 << 8;
num |= arr[1];
return num;
}
static void fromUint16LE(uint16_t in, uint8_t *arr)
{
arr[0] = in & 0x00FF;
arr[1] = (in >> 8) & 0x00FF;
}
static void fromUint16BE(uint16_t in, uint8_t *arr)
{
arr[1] = in & 0x00FF;
arr[0] = (in >> 8) & 0x00FF;
}
static void fromSint16BE(int16_t in, uint8_t *arr)
{
arr[1] = in & 0x00FF;
arr[0] = ((uint16_t)in >> 8) & 0x00FF;
}
WOPNFile *WOPN_Init(uint16_t melodic_banks, uint16_t percussive_banks)
{
WOPNFile *file = NULL;
if(melodic_banks == 0)
return NULL;
if(percussive_banks == 0)
return NULL;
file = (WOPNFile*)calloc(1, sizeof(WOPNFile));
if(!file)
return NULL;
file->banks_count_melodic = melodic_banks;
file->banks_count_percussion = percussive_banks;
file->banks_melodic = (WOPNBank*)calloc(1, sizeof(WOPNBank) * melodic_banks );
file->banks_percussive = (WOPNBank*)calloc(1, sizeof(WOPNBank) * percussive_banks );
return file;
}
void WOPN_Free(WOPNFile *file)
{
if(file)
{
if(file->banks_melodic)
free(file->banks_melodic);
if(file->banks_percussive)
free(file->banks_percussive);
free(file);
}
}
int WOPN_BanksCmp(const WOPNFile *bank1, const WOPNFile *bank2)
{
int res = 1;
res &= (bank1->version == bank2->version);
res &= (bank1->lfo_freq == bank2->lfo_freq);
res &= (bank1->volume_model == bank2->volume_model);
res &= (bank1->banks_count_melodic == bank2->banks_count_melodic);
res &= (bank1->banks_count_percussion == bank2->banks_count_percussion);
if(res)
{
int i;
for(i = 0; i < bank1->banks_count_melodic; i++)
res &= (memcmp(&bank1->banks_melodic[i], &bank2->banks_melodic[i], sizeof(WOPNBank)) == 0);
if(res)
{
for(i = 0; i < bank1->banks_count_percussion; i++)
res &= (memcmp(&bank1->banks_percussive[i], &bank2->banks_percussive[i], sizeof(WOPNBank)) == 0);
}
}
return res;
}
static void WOPN_parseInstrument(WOPNInstrument *ins, uint8_t *cursor, uint16_t version, uint8_t has_sounding_delays)
{
int l;
strncpy(ins->inst_name, (const char*)cursor, 32);
ins->inst_name[32] = '\0';
ins->note_offset = toSint16BE(cursor + 32);
ins->midi_velocity_offset = 0; /* TODO: for future version > 2 */
ins->percussion_key_number = cursor[34];
ins->inst_flags = 0; /* TODO: for future version > 2 */
ins->fbalg = cursor[35];
ins->lfosens = cursor[36];
for(l = 0; l < 4; l++)
{
size_t off = 37 + (size_t)(l) * 7;
ins->operators[l].dtfm_30 = cursor[off + 0];
ins->operators[l].level_40 = cursor[off + 1];
ins->operators[l].rsatk_50 = cursor[off + 2];
ins->operators[l].amdecay1_60 = cursor[off + 3];
ins->operators[l].decay2_70 = cursor[off + 4];
ins->operators[l].susrel_80 = cursor[off + 5];
ins->operators[l].ssgeg_90 = cursor[off + 6];
}
if((version >= 2) && has_sounding_delays)
{
ins->delay_on_ms = toUint16BE(cursor + 65);
ins->delay_off_ms = toUint16BE(cursor + 67);
/* Null delays indicate the blank instrument in version 2 */
if((version < 3) && ins->delay_on_ms == 0 && ins->delay_off_ms == 0)
ins->inst_flags |= WOPN_Ins_IsBlank;
}
}
static void WOPN_writeInstrument(WOPNInstrument *ins, uint8_t *cursor, uint16_t version, uint8_t has_sounding_delays)
{
int l;
strncpy((char*)cursor, ins->inst_name, 32);
fromSint16BE(ins->note_offset, cursor + 32);
cursor[34] = ins->percussion_key_number;
cursor[35] = ins->fbalg;
cursor[36] = ins->lfosens;
for(l = 0; l < 4; l++)
{
size_t off = 37 + (size_t)(l) * 7;
cursor[off + 0] = ins->operators[l].dtfm_30;
cursor[off + 1] = ins->operators[l].level_40;
cursor[off + 2] = ins->operators[l].rsatk_50;
cursor[off + 3] = ins->operators[l].amdecay1_60;
cursor[off + 4] = ins->operators[l].decay2_70;
cursor[off + 5] = ins->operators[l].susrel_80;
cursor[off + 6] = ins->operators[l].ssgeg_90;
}
if((version >= 2) && has_sounding_delays)
{
if((version < 3) && (ins->inst_flags & WOPN_Ins_IsBlank) != 0)
{
/* Null delays indicate the blank instrument in version 2 */
fromUint16BE(0, cursor + 65);
fromUint16BE(0, cursor + 67);
}
else
{
fromUint16BE(ins->delay_on_ms, cursor + 65);
fromUint16BE(ins->delay_off_ms, cursor + 67);
}
}
}
WOPNFile *WOPN_LoadBankFromMem(void *mem, size_t length, int *error)
{
WOPNFile *outFile = NULL;
uint16_t i = 0, j = 0, k = 0;
uint16_t version = 0;
uint16_t count_melodic_banks = 1;
uint16_t count_percussive_banks = 1;
uint8_t *cursor = (uint8_t *)mem;
WOPNBank *bankslots[2];
uint16_t bankslots_sizes[2];
#define SET_ERROR(err) \
{\
WOPN_Free(outFile);\
if(error)\
{\
*error = err;\
}\
}
#define GO_FORWARD(bytes) { cursor += bytes; length -= bytes; }
if(!cursor)
{
SET_ERROR(WOPN_ERR_NULL_POINTER);
return NULL;
}
{/* Magic number */
if(length < 11)
{
SET_ERROR(WOPN_ERR_UNEXPECTED_ENDING);
return NULL;
}
if(memcmp(cursor, wopn2_magic1, 11) == 0)
{
version = 1;
}
else if(memcmp(cursor, wopn2_magic2, 11) != 0)
{
SET_ERROR(WOPN_ERR_BAD_MAGIC);
return NULL;
}
GO_FORWARD(11);
}
if (version == 0)
{/* Version code */
if(length < 2)
{
SET_ERROR(WOPN_ERR_UNEXPECTED_ENDING);
return NULL;
}
version = toUint16LE(cursor);
if(version > wopn_latest_version)
{
SET_ERROR(WOPN_ERR_NEWER_VERSION);
return NULL;
}
GO_FORWARD(2);
}
{/* Header of WOPN */
uint8_t head[5];
if(length < 5)
{
SET_ERROR(WOPN_ERR_UNEXPECTED_ENDING);
return NULL;
}
memcpy(head, cursor, 5);
count_melodic_banks = toUint16BE(head);
count_percussive_banks = toUint16BE(head + 2);
GO_FORWARD(5);
outFile = WOPN_Init(count_melodic_banks, count_percussive_banks);
if(!outFile)
{
SET_ERROR(WOPN_ERR_OUT_OF_MEMORY);
return NULL;
}
outFile->version = version;
outFile->lfo_freq = head[4];
outFile->volume_model = 0;
}
bankslots_sizes[0] = count_melodic_banks;
bankslots[0] = outFile->banks_melodic;
bankslots_sizes[1] = count_percussive_banks;
bankslots[1] = outFile->banks_percussive;
if(version >= 2) /* Bank names and LSB/MSB titles */
{
for(i = 0; i < 2; i++)
{
for(j = 0; j < bankslots_sizes[i]; j++)
{
if(length < 34)
{
SET_ERROR(WOPN_ERR_UNEXPECTED_ENDING);
return NULL;
}
strncpy(bankslots[i][j].bank_name, (const char*)cursor, 32);
bankslots[i][j].bank_name[32] = '\0';
bankslots[i][j].bank_midi_lsb = cursor[32];
bankslots[i][j].bank_midi_msb = cursor[33];
GO_FORWARD(34);
}
}
}
{/* Read instruments data */
uint16_t insSize = 0;
if(version > 1)
insSize = WOPN_INST_SIZE_V2;
else
insSize = WOPN_INST_SIZE_V1;
for(i = 0; i < 2; i++)
{
if(length < (insSize * 128) * (size_t)bankslots_sizes[i])
{
SET_ERROR(WOPN_ERR_UNEXPECTED_ENDING);
return NULL;
}
for(j = 0; j < bankslots_sizes[i]; j++)
{
for(k = 0; k < 128; k++)
{
WOPNInstrument *ins = &bankslots[i][j].ins[k];
WOPN_parseInstrument(ins, cursor, version, 1);
GO_FORWARD(insSize);
}
}
}
}
#undef GO_FORWARD
#undef SET_ERROR
return outFile;
}
int WOPN_LoadInstFromMem(OPNIFile *file, void *mem, size_t length)
{
uint16_t version = 0;
uint8_t *cursor = (uint8_t *)mem;
uint16_t ins_size;
if(!cursor)
return WOPN_ERR_NULL_POINTER;
#define GO_FORWARD(bytes) { cursor += bytes; length -= bytes; }
{/* Magic number */
if(length < 11)
return WOPN_ERR_UNEXPECTED_ENDING;
if(memcmp(cursor, opni_magic1, 11) == 0)
version = 1;
else if(memcmp(cursor, opni_magic2, 11) != 0)
return WOPN_ERR_BAD_MAGIC;
GO_FORWARD(11);
}
if (version == 0) {/* Version code */
if(length < 2)
return WOPN_ERR_UNEXPECTED_ENDING;
version = toUint16LE(cursor);
if(version > wopn_latest_version)
return WOPN_ERR_NEWER_VERSION;
GO_FORWARD(2);
}
file->version = version;
{/* is drum flag */
if(length < 1)
return WOPN_ERR_UNEXPECTED_ENDING;
file->is_drum = *cursor;
GO_FORWARD(1);
}
if(version > 1)
/* Skip sounding delays are not part of single-instrument file
* two sizes of uint16_t will be subtracted */
ins_size = WOPN_INST_SIZE_V2 - (sizeof(uint16_t) * 2);
else
ins_size = WOPN_INST_SIZE_V1;
if(length < ins_size)
return WOPN_ERR_UNEXPECTED_ENDING;
WOPN_parseInstrument(&file->inst, cursor, version, 0);
GO_FORWARD(ins_size);
return WOPN_ERR_OK;
#undef GO_FORWARD
}
size_t WOPN_CalculateBankFileSize(WOPNFile *file, uint16_t version)
{
size_t final_size = 0;
size_t ins_size = 0;
if(version == 0)
version = wopn_latest_version;
if(!file)
return 0;
final_size += 11 + 2 + 2 + 2 + 1;
/*
* Magic number,
* Version,
* Count of melodic banks,
* Count of percussive banks,
* Chip specific flags
*/
if(version >= 2)
{
/* Melodic banks meta-data */
final_size += (32 + 1 + 1) * file->banks_count_melodic;
/* Percussive banks meta-data */
final_size += (32 + 1 + 1) * file->banks_count_percussion;
}
if(version >= 2)
ins_size = WOPN_INST_SIZE_V2;
else
ins_size = WOPN_INST_SIZE_V1;
/* Melodic instruments */
final_size += (ins_size * 128) * file->banks_count_melodic;
/* Percussive instruments */
final_size += (ins_size * 128) * file->banks_count_percussion;
return final_size;
}
size_t WOPN_CalculateInstFileSize(OPNIFile *file, uint16_t version)
{
size_t final_size = 0;
size_t ins_size = 0;
if(version == 0)
version = wopn_latest_version;
if(!file)
return 0;
final_size += 11 + 1;
/*
* Magic number,
* is percussive instrument
*/
/* Version */
if (version > 1)
final_size += 2;
if(version > 1)
/* Skip sounding delays are not part of single-instrument file
* two sizes of uint16_t will be subtracted */
ins_size = WOPN_INST_SIZE_V2 - (sizeof(uint16_t) * 2);
else
ins_size = WOPN_INST_SIZE_V1;
final_size += ins_size;
return final_size;
}
int WOPN_SaveBankToMem(WOPNFile *file, void *dest_mem, size_t length, uint16_t version, uint16_t force_gm)
{
uint8_t *cursor = (uint8_t *)dest_mem;
uint16_t ins_size = 0;
uint16_t i, j, k;
uint16_t banks_melodic = force_gm ? 1 : file->banks_count_melodic;
uint16_t banks_percussive = force_gm ? 1 : file->banks_count_percussion;
WOPNBank *bankslots[2];
uint16_t bankslots_sizes[2];
if(version == 0)
version = wopn_latest_version;
#define GO_FORWARD(bytes) { cursor += bytes; length -= bytes; }
if(length < 11)
return WOPN_ERR_UNEXPECTED_ENDING;
if(version > 1)
memcpy(cursor, wopn2_magic2, 11);
else
memcpy(cursor, wopn2_magic1, 11);
GO_FORWARD(11);
if(version > 1)
{
if(length < 2)
return WOPN_ERR_UNEXPECTED_ENDING;
fromUint16LE(version, cursor);
GO_FORWARD(2);
}
if(length < 2)
return WOPN_ERR_UNEXPECTED_ENDING;
fromUint16BE(banks_melodic, cursor);
GO_FORWARD(2);
if(length < 2)
return WOPN_ERR_UNEXPECTED_ENDING;
fromUint16BE(banks_percussive, cursor);
GO_FORWARD(2);
if(length < 1)
return WOPN_ERR_UNEXPECTED_ENDING;
cursor[0] = file->lfo_freq;
GO_FORWARD(1);
bankslots[0] = file->banks_melodic;
bankslots_sizes[0] = banks_melodic;
bankslots[1] = file->banks_percussive;
bankslots_sizes[1] = banks_percussive;
if(version >= 2)
{
for(i = 0; i < 2; i++)
{
for(j = 0; j < bankslots_sizes[i]; j++)
{
if(length < 34)
return WOPN_ERR_UNEXPECTED_ENDING;
strncpy((char*)cursor, bankslots[i][j].bank_name, 32);
cursor[32] = bankslots[i][j].bank_midi_lsb;
cursor[33] = bankslots[i][j].bank_midi_msb;
GO_FORWARD(34);
}
}
}
{/* Write instruments data */
if(version >= 2)
ins_size = WOPN_INST_SIZE_V2;
else
ins_size = WOPN_INST_SIZE_V1;
for(i = 0; i < 2; i++)
{
if(length < (ins_size * 128) * (size_t)bankslots_sizes[i])
return WOPN_ERR_UNEXPECTED_ENDING;
for(j = 0; j < bankslots_sizes[i]; j++)
{
for(k = 0; k < 128; k++)
{
WOPNInstrument *ins = &bankslots[i][j].ins[k];
WOPN_writeInstrument(ins, cursor, version, 1);
GO_FORWARD(ins_size);
}
}
}
}
return WOPN_ERR_OK;
#undef GO_FORWARD
}
int WOPN_SaveInstToMem(OPNIFile *file, void *dest_mem, size_t length, uint16_t version)
{
uint8_t *cursor = (uint8_t *)dest_mem;
uint16_t ins_size;
if(!cursor)
return WOPN_ERR_NULL_POINTER;
if(version == 0)
version = wopn_latest_version;
#define GO_FORWARD(bytes) { cursor += bytes; length -= bytes; }
{/* Magic number */
if(length < 11)
return WOPN_ERR_UNEXPECTED_ENDING;
if(version > 1)
memcpy(cursor, opni_magic2, 11);
else
memcpy(cursor, opni_magic1, 11);
GO_FORWARD(11);
}
if (version > 1)
{/* Version code */
if(length < 2)
return WOPN_ERR_UNEXPECTED_ENDING;
fromUint16LE(version, cursor);
GO_FORWARD(2);
}
{/* is drum flag */
if(length < 1)
return WOPN_ERR_UNEXPECTED_ENDING;
*cursor = file->is_drum;
GO_FORWARD(1);
}
if(version > 1)
/* Skip sounding delays are not part of single-instrument file
* two sizes of uint16_t will be subtracted */
ins_size = WOPN_INST_SIZE_V2 - (sizeof(uint16_t) * 2);
else
ins_size = WOPN_INST_SIZE_V1;
if(length < ins_size)
return WOPN_ERR_UNEXPECTED_ENDING;
WOPN_writeInstrument(&file->inst, cursor, version, 0);
GO_FORWARD(ins_size);
return WOPN_ERR_OK;
#undef GO_FORWARD
}
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