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89 lines
2.8 KiB
89 lines
2.8 KiB
//
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// sysexfileloader.h
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//
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// See: https://github.com/asb2m10/dexed/blob/master/Documentation/sysex-format.txt
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//
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// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
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// Copyright (C) 2022 The MiniDexed Team
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#ifndef _sysexfileloader_h
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#define _sysexfileloader_h
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#include <stdint.h>
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#include <string>
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#include <circle/macros.h>
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class CSysExFileLoader // Loader for DX7 .syx files
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{
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public:
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static const unsigned MaxVoiceBankID = 16383; // i.e. 14-bit MSB/LSB value between 0 and 16383
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static const unsigned VoicesPerBank = 32;
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static const size_t SizePackedVoice = 128;
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static const size_t SizeSingleVoice = 156;
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static const unsigned VoiceSysExHdrSize = 8; // Additional (optional) Header/Footer bytes for bank of 32 voices
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static const unsigned VoiceSysExSize = 4096; // Bank of 32 voices as per DX7 MIDI Spec
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static const unsigned MaxSubDirs = 3; // Number of nested subdirectories supported.
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struct TVoiceBank
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{
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uint8_t StatusStart; // 0xF0
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uint8_t CompanyID; // 0x43
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uint8_t SubStatus; // 0x00
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uint8_t Format; // 0x09
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uint8_t ByteCountMS; // 0x20
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uint8_t ByteCountLS; // 0x00
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uint8_t Voice[VoicesPerBank][SizePackedVoice];
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uint8_t Checksum;
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uint8_t StatusEnd; // 0xF7
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}
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PACKED;
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public:
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CSysExFileLoader (const char *pDirName = "/sysex");
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~CSysExFileLoader (void);
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void Load (bool bHeaderlessSysExVoices = false);
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std::string GetBankName (unsigned nBankID); // 0 .. MaxVoiceBankID
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unsigned GetNumHighestBank (); // 0 .. MaxVoiceBankID
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bool IsValidBank (unsigned nBankID);
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unsigned GetNextBankUp (unsigned nBankID);
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unsigned GetNextBankDown (unsigned nBankID);
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void GetVoice (unsigned nBankID, // 0 .. MaxVoiceBankID
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unsigned nVoiceID, // 0 .. 31
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uint8_t *pVoiceData); // returns unpacked format (156 bytes)
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private:
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static void DecodePackedVoice (const uint8_t *pPackedData, uint8_t *pDecodedData);
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private:
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std::string m_DirName;
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unsigned m_nNumHighestBank;
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unsigned m_nBanksLoaded;
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TVoiceBank *m_pVoiceBank[MaxVoiceBankID+1];
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std::string m_BankFileName[MaxVoiceBankID+1];
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static uint8_t s_DefaultVoice[SizeSingleVoice];
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void LoadBank (const char * sDirName, const char * sBankName, bool bHeaderlessSysExVoices, unsigned nSubDirCount);
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};
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#endif
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