176 lines
8.1 KiB
C++
176 lines
8.1 KiB
C++
/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
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* Copyright (C) 2011-2022 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
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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 Lesser General Public License as published by
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* the Free Software Foundation, either version 2.1 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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 MT32EMU_ROMINFO_H
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#define MT32EMU_ROMINFO_H
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#include <cstddef>
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#include "globals.h"
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#include "File.h"
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namespace MT32Emu {
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// Defines vital info about ROM file to be used by synth and applications
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struct ROMInfo {
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public:
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size_t fileSize;
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const File::SHA1Digest &sha1Digest;
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enum Type {PCM, Control, Reverb} type;
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const char *shortName;
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const char *description;
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enum PairType {
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// Complete ROM image ready to use with Synth.
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Full,
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// ROM image contains data that occupies lower addresses. Needs pairing before use.
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FirstHalf,
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// ROM image contains data that occupies higher addresses. Needs pairing before use.
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SecondHalf,
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// ROM image contains data that occupies even addresses. Needs pairing before use.
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Mux0,
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// ROM image contains data that occupies odd addresses. Needs pairing before use.
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Mux1
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} pairType;
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// NULL for Full images or a pointer to the corresponding other image for pairing.
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const ROMInfo *pairROMInfo;
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// Returns a ROMInfo struct by inspecting the size and the SHA1 hash of the file
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// among all the known ROMInfos.
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MT32EMU_EXPORT static const ROMInfo *getROMInfo(File *file);
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// Returns a ROMInfo struct by inspecting the size and the SHA1 hash of the file
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// among the ROMInfos listed in the NULL-terminated list romInfos.
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MT32EMU_EXPORT_V(2.5) static const ROMInfo *getROMInfo(File *file, const ROMInfo * const *romInfos);
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// Currently no-op
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MT32EMU_EXPORT static void freeROMInfo(const ROMInfo *romInfo);
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// Allows retrieving a NULL-terminated list of ROMInfos for a range of types and pairTypes
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// (specified by bitmasks)
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// Useful for GUI/console app to output information on what ROMs it supports
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// The caller must free the returned list with freeROMInfoList when finished.
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MT32EMU_EXPORT static const ROMInfo **getROMInfoList(Bit32u types, Bit32u pairTypes);
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// Frees the list of ROMInfos given that has been created by getROMInfoList.
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MT32EMU_EXPORT static void freeROMInfoList(const ROMInfo **romInfos);
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// Returns an immutable NULL-terminated list of all (full and partial) supported ROMInfos.
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// For convenience, this method also can fill the number of non-NULL items present in the list
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// if a non-NULL value is provided in optional argument itemCount.
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MT32EMU_EXPORT_V(2.5) static const ROMInfo * const *getAllROMInfos(Bit32u *itemCount = NULL);
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// Returns an immutable NULL-terminated list of all supported full ROMInfos.
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// For convenience, this method also can fill the number of non-NULL items present in the list
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// if a non-NULL value is provided in optional argument itemCount.
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MT32EMU_EXPORT_V(2.5) static const ROMInfo * const *getFullROMInfos(Bit32u *itemCount = NULL);
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// Returns an immutable NULL-terminated list of all supported partial ROMInfos.
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// For convenience, this method also can fill the number of non-NULL items present in the list
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// if a non-NULL value is provided in optional argument itemCount.
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MT32EMU_EXPORT_V(2.5) static const ROMInfo * const *getPartialROMInfos(Bit32u *itemCount = NULL);
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};
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// Synth::open() requires a full control ROMImage and a compatible full PCM ROMImage to work
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class ROMImage {
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public:
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// Creates a ROMImage object given a ROMInfo and a File. Keeps a reference
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// to the File and ROMInfo given, which must be freed separately by the user
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// after the ROMImage is freed.
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// CAVEAT: This method always prefers full ROM images over partial ones.
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// Because the lower half of CM-32L/CM-64/LAPC-I PCM ROM is essentially the full
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// MT-32 PCM ROM, it is therefore aliased. In this case a partial image can only be
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// created by the overridden method makeROMImage(File *, const ROMInfo * const *).
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MT32EMU_EXPORT static const ROMImage *makeROMImage(File *file);
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// Same as the method above but only permits creation of a ROMImage if the file content
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// matches one of the ROMs described in a NULL-terminated list romInfos. This list can be
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// created using e.g. method ROMInfo::getROMInfoList.
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MT32EMU_EXPORT_V(2.5) static const ROMImage *makeROMImage(File *file, const ROMInfo * const *romInfos);
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// Creates a ROMImage object given a couple of files that contain compatible partial ROM images.
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// The files aren't referenced by the resulting ROMImage and may be freed anytime afterwards.
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// The file in the resulting image will be automatically freed along with the ROMImage.
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// If the given files contain incompatible partial images, NULL is returned.
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MT32EMU_EXPORT_V(2.5) static const ROMImage *makeROMImage(File *file1, File *file2);
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// Must only be done after all Synths using the ROMImage are deleted
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MT32EMU_EXPORT static void freeROMImage(const ROMImage *romImage);
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// Checks whether the given ROMImages are pairable and merges them into a full image, if possible.
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// If the check fails, NULL is returned.
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MT32EMU_EXPORT_V(2.5) static const ROMImage *mergeROMImages(const ROMImage *romImage1, const ROMImage *romImage2);
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MT32EMU_EXPORT File *getFile() const;
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// Returns true in case this ROMImage is built with a user provided File that has to be deallocated separately.
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// For a ROMImage created via merging two partial ROMImages, this method returns false.
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MT32EMU_EXPORT_V(2.5) bool isFileUserProvided() const;
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MT32EMU_EXPORT const ROMInfo *getROMInfo() const;
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private:
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static const ROMImage *makeFullROMImage(Bit8u *data, size_t dataSize);
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static const ROMImage *appendImages(const ROMImage *romImageLow, const ROMImage *romImageHigh);
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static const ROMImage *interleaveImages(const ROMImage *romImageEven, const ROMImage *romImageOdd);
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File * const file;
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const bool ownFile;
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const ROMInfo * const romInfo;
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ROMImage(File *file, bool ownFile, const ROMInfo * const *romInfos);
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~ROMImage();
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// Make ROMIMage an identity class.
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ROMImage(const ROMImage &);
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ROMImage &operator=(const ROMImage &);
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};
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class MachineConfiguration {
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public:
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// Returns an immutable NULL-terminated list of all supported machine configurations.
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// For convenience, this method also can fill the number of non-NULL items present in the list
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// if a non-NULL value is provided in optional argument itemCount.
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MT32EMU_EXPORT_V(2.5) static const MachineConfiguration * const *getAllMachineConfigurations(Bit32u *itemCount = NULL);
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// Returns a string identifier of this MachineConfiguration.
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MT32EMU_EXPORT_V(2.5) const char *getMachineID() const;
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// Returns an immutable NULL-terminated list of ROMInfos that are compatible with this
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// MachineConfiguration. That means the respective ROMImages can be successfully used together
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// by the emulation engine. Calling ROMInfo::getROMInfo or ROMImage::makeROMImage with this list
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// supplied enables identification of all files containing desired ROM images while filtering out
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// any incompatible ones.
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// For convenience, this method also can fill the number of non-NULL items present in the list
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// if a non-NULL value is provided in optional argument itemCount.
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MT32EMU_EXPORT_V(2.5) const ROMInfo * const *getCompatibleROMInfos(Bit32u *itemCount = NULL) const;
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private:
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const char * const machineID;
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const ROMInfo * const * const romInfos;
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const Bit32u romInfosCount;
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MachineConfiguration(const char *machineID, const ROMInfo * const *romInfos, Bit32u romInfosCount);
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// Make MachineConfiguration an identity class.
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MachineConfiguration(const MachineConfiguration &);
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~MachineConfiguration() {}
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MachineConfiguration &operator=(const MachineConfiguration &);
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};
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} // namespace MT32Emu
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#endif // #ifndef MT32EMU_ROMINFO_H
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