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-rw-r--r--lib/rbcodec/codecs/cRSID/C64/libcRSIDc64.h172
1 files changed, 172 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/cRSID/C64/libcRSIDc64.h b/lib/rbcodec/codecs/cRSID/C64/libcRSIDc64.h
new file mode 100644
index 0000000000..5100680768
--- /dev/null
+++ b/lib/rbcodec/codecs/cRSID/C64/libcRSIDc64.h
@@ -0,0 +1,172 @@
+// cRSID lightweight RealSID (integer-only) library-header (with API-calls) by Hermit (Mihaly Horvath)
+
+#ifndef LIBCRSIDC64_HEADER
+#define LIBCRSIDC64_HEADER //used to prevent double inclusion of this header-file
+
+typedef struct cRSID_CPUinstance cRSID_CPUinstance;
+typedef struct cRSID_SIDinstance cRSID_SIDinstance;
+typedef struct cRSID_CIAinstance cRSID_CIAinstance;
+typedef struct cRSID_VICinstance cRSID_VICinstance;
+
+
+//Internal functions
+
+// C64/C64.c
+cRSID_C64instance* cRSID_createC64 (cRSID_C64instance* C64, unsigned short samplerate);
+void cRSID_setC64 (cRSID_C64instance* C64); //configure hardware (SIDs) for SID-tune
+void cRSID_initC64 (cRSID_C64instance* C64); //hard-reset
+int cRSID_emulateC64 (cRSID_C64instance* C64);
+static inline short cRSID_playPSIDdigi (cRSID_C64instance* C64);
+// C64/MEM.c
+static inline unsigned char* cRSID_getMemReadPtr (register unsigned short address); //for global cSID_C64 fast-access
+static inline unsigned char* cRSID_getMemReadPtrC64 (cRSID_C64instance* C64, register unsigned short address); //maybe slower
+static inline unsigned char* cRSID_getMemWritePtr (register unsigned short address); //for global cSID_C64 fast-access
+static inline unsigned char* cRSID_getMemWritePtrC64 (cRSID_C64instance* C64, register unsigned short address); //maybe slower
+static inline unsigned char cRSID_readMem (register unsigned short address); //for global cSID_C64 fast-access
+static inline unsigned char cRSID_readMemC64 (cRSID_C64instance* C64, register unsigned short address); //maybe slower
+static inline void cRSID_writeMem (register unsigned short address, register unsigned char data); //for global cSID_C64 fast-access
+static inline void cRSID_writeMemC64 (cRSID_C64instance* C64, register unsigned short address, register unsigned char data); //maybe slower
+void cRSID_setROMcontent (cRSID_C64instance* C64); //KERNAL, BASIC
+void cRSID_initMem (cRSID_C64instance* C64);
+// C64/CPU.c
+void cRSID_initCPU (cRSID_CPUinstance* CPU, unsigned short mempos);
+unsigned char cRSID_emulateCPU (void); //direct instances inside for hopefully faster operation
+static inline char cRSID_handleCPUinterrupts (cRSID_CPUinstance* CPU);
+// C64/SID.c
+void cRSID_createSIDchip (cRSID_C64instance* C64, cRSID_SIDinstance* SID, unsigned short model, unsigned short baseaddress);
+void cRSID_initSIDchip (cRSID_SIDinstance* SID);
+void cRSID_emulateADSRs (cRSID_SIDinstance *SID, char cycles);
+int cRSID_emulateWaves (cRSID_SIDinstance* SID);
+// C64/CIA.c
+void cRSID_createCIAchip (cRSID_C64instance* C64, cRSID_CIAinstance* CIA, unsigned short baseaddress);
+void cRSID_initCIAchip (cRSID_CIAinstance* CIA);
+static inline char cRSID_emulateCIA (cRSID_CIAinstance* CIA, char cycles);
+static inline void cRSID_writeCIAIRQmask (cRSID_CIAinstance* CIA, unsigned char value);
+static inline void cRSID_acknowledgeCIAIRQ (cRSID_CIAinstance* CIA);
+// C64/VIC.c
+void cRSID_createVICchip (cRSID_C64instance* C64, cRSID_VICinstance* VIC, unsigned short baseaddress);
+void cRSID_initVICchip (cRSID_VICinstance* VIC);
+static inline char cRSID_emulateVIC (cRSID_VICinstance* VIC, char cycles);
+static inline void cRSID_acknowledgeVICrasterIRQ (cRSID_VICinstance* VIC);
+
+// host/file.c
+#ifdef CRSID_PLATFORM_PC
+int cRSID_loadSIDfile (unsigned char* SIDfileData, char* filename, int maxlen); //load SID-file to a memory location (and return size)
+#endif
+// host/audio.c
+#ifdef CRSID_PLATFORM_PC
+void* cRSID_initSound (cRSID_C64instance* C64, unsigned short samplerate, unsigned short buflen);
+void cRSID_startSound (void);
+void cRSID_stopSound (void);
+void cRSID_closeSound (void);
+void cRSID_generateSound (cRSID_C64instance* C64, unsigned char* buf, unsigned short len);
+#endif
+
+
+struct cRSID_CPUinstance {
+ cRSID_C64instance* C64; //reference to the containing C64
+ unsigned int PC;
+ short int A, SP;
+ unsigned char X, Y, ST; //STATUS-flags: N V - B D I Z C
+ unsigned char PrevNMI; //used for NMI leading edge detection
+};
+
+
+struct cRSID_SIDinstance {
+ //SID-chip data:
+ cRSID_C64instance* C64; //reference to the containing C64
+ unsigned short ChipModel; //values: 8580 / 6581
+ unsigned short BaseAddress; //SID-baseaddress location in C64-memory (IO)
+ unsigned char* BasePtr; //SID-baseaddress location in host's memory
+ //ADSR-related:
+ unsigned char ADSRstate[15];
+ unsigned short RateCounter[15];
+ unsigned char EnvelopeCounter[15];
+ unsigned char ExponentCounter[15];
+ //Wave-related:
+ int PhaseAccu[15]; //28bit precision instead of 24bit
+ int PrevPhaseAccu[15]; //(integerized ClockRatio fractionals, WebSID has similar solution)
+ unsigned char SyncSourceMSBrise;
+ unsigned int RingSourceMSB;
+ unsigned int NoiseLFSR[15];
+ unsigned int PrevWavGenOut[15];
+ unsigned char PrevWavData[15];
+ //Filter-related:
+ int PrevLowPass;
+ int PrevBandPass;
+ //Output-stage:
+ signed int PrevVolume; //lowpass-filtered version of Volume-band register
+};
+
+
+struct cRSID_CIAinstance {
+ cRSID_C64instance* C64; //reference to the containing C64
+ char ChipModel; //old or new CIA? (have 1 cycle difference in cases)
+ unsigned short BaseAddress; //CIA-baseaddress location in C64-memory (IO)
+ unsigned char* BasePtrWR; //CIA-baseaddress location in host's memory for writing
+ unsigned char* BasePtrRD; //CIA-baseaddress location in host's memory for reading
+};
+
+
+struct cRSID_VICinstance {
+ cRSID_C64instance* C64; //reference to the containing C64
+ char ChipModel; //(timing differences between models?)
+ unsigned short BaseAddress; //VIC-baseaddress location in C64-memory (IO)
+ unsigned char* BasePtrWR; //VIC-baseaddress location in host's memory for writing
+ unsigned char* BasePtrRD; //VIC-baseaddress location in host's memory for reading
+ unsigned short RasterLines;
+ unsigned char RasterRowCycles;
+ unsigned char RowCycleCnt;
+};
+
+
+struct cRSID_C64instance {
+ //platform-related:
+ unsigned short SampleRate;
+ //C64-machine related:
+ unsigned char VideoStandard; //0:NTSC, 1:PAL (based on the SID-header field)
+ unsigned int CPUfrequency;
+ unsigned short SampleClockRatio; //ratio of CPU-clock and samplerate
+ //SID-file related:
+ union {
+ cRSID_SIDheader* SIDheader;
+ char* SIDfileData;
+ };
+ unsigned short Attenuation;
+ char RealSIDmode;
+ char PSIDdigiMode;
+ unsigned char SubTune;
+ unsigned short LoadAddress;
+ unsigned short InitAddress;
+ unsigned short PlayAddress;
+ unsigned short EndAddress;
+ char TimerSource; //for current subtune, 0:VIC, 1:CIA (as in SID-header)
+ //PSID-playback related:
+ //char CIAisSet; //for dynamic CIA setting from player-routine (RealSID substitution)
+ int FrameCycles;
+ int FrameCycleCnt; //this is a substitution in PSID-mode for CIA/VIC counters
+ short PrevRasterLine;
+ short SampleCycleCnt;
+ short TenthSecondCnt;
+ char Finished;
+ char Returned;
+ unsigned char IRQ; //collected IRQ line from devices
+ unsigned char NMI; //collected NMI line from devices
+
+ //Hardware-elements:
+ cRSID_CPUinstance CPU;
+ cRSID_SIDinstance SID[CRSID_SIDCOUNT_MAX+1];
+ cRSID_CIAinstance CIA[CRSID_CIACOUNT+1];
+ cRSID_VICinstance VIC;
+ //Overlapping system memories, which one is read/written in an address region depends on CPU-port bankselect-bits)
+ //Address $00 and $01 - data-direction and data-register of port built into CPU (used as bank-selection) (overriding RAM on C64)
+ unsigned char RAMbank[0x10100]; //$0000..$FFFF RAM (and RAM under IO/ROM/CPUport)
+ unsigned char IObankWR[0x10100]; //$D000..$DFFF IO-RAM (registers) to write (VIC/SID/CIA/ColorRAM/IOexpansion)
+ unsigned char IObankRD[0x10100]; //$D000..$DFFF IO-RAM (registers) to read from (VIC/SID/CIA/ColorRAM/IOexpansion)
+ unsigned char ROMbanks[0x10100]; //$1000..$1FFF/$9000..$9FFF (CHARGEN), $A000..$BFFF (BASIC), $E000..$FFFF (KERNAL)
+};
+
+cRSID_C64instance cRSID_C64; //the only global object (for faster & simpler access than with struct-pointers, in some places)
+
+
+#endif //LIBCRSIDC64_HEADER