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#pragma once
// TZX File Format specification can be found at
// https://www.worldofspectrum.org/TZXformat.html
#include "TZXBlock.h"
#include "TZXBlockTextDescription.h"
#include "TZXBlockStandardSpeedData.h"
#include "TZXBlockArchiveInfo.h"
#include "TZXAudioGenerator.h"
#include "TZXBlockGroupStart.h"
#include "TZXBlockTurboSpeedData.h"
#include "TZXBlockLoopStart.h"
#include "TZXBlockPureTone.h"
#include "TZXBlockPulseSequence.h"
#include "TZXBlockLoopEnd.h"
#include "TZXBlockGroupEnd.h"
#include "TZXBlockPause.h"
#include "TZXBlockPureData.h"
#include "TZXBlockHardwareType.h"
#include "TZXBlockStopTheTape48K.h"
#include "TZXBlockCustomInfo.h"
#include "TZXBlockMessage.h"
#define MAX_TZX_BLOCKS 512
#define TZX_SUCCESS 0
#define TZX_UNEXPECTED_EOF 1
#define TZX_BAD_TZX_SIGNATURE 2
#define TZX_UNSUPPORTED_REVISION 3
#define TZX_UNHANDLED_BLOCK_TYPE 4
#define TZX_BLOCK_LIST_OVERFLOW 5
#define TZX_INVALID_TZX_DATA 6
// Supported block types
#define TZX_BLOCKID_STANDARD_SPEED_DATA 0x10
#define TZX_BLOCKID_TURBO_SPEED_DATA 0x11
#define TZX_BLOCKID_PURE_TONE 0x12
#define TZX_BLOCKID_PULSE_SEQUENCE 0x13
#define TZX_BLOCKID_PURE_DATA 0x14
#define TZX_BLOCKID_PAUSE 0x20
#define TZX_BLOCKID_GROUP_START 0x21
#define TZX_BLOCKID_GROUP_END 0x22
#define TZX_BLOCKID_LOOP_START 0x24
#define TZX_BLOCKID_LOOP_END 0x25
#define TZX_BLOCKID_STOP_THE_TAPE_48K 0x2A
#define TZX_BLOCKID_TEXT_DESCRIPTION 0x30
#define TZX_BLOCKID_MESSAGE_BLOCK 0x31
#define TZX_BLOCKID_ARCHIVE_INFO 0x32
#define TZX_BLOCKID_HARDWARE_TYPE 0x33
#define TZX_BLOCKID_CUSTOM_INFO 0x35
// Currently unsupported block types
#define TZX_BLOCKID_DIRECT_RECORDING 0x15
#define TZX_BLOCKID_CSW_RECORDING 0x18
#define TZX_BLOCKID_GENERALIZED_DATA 0x19
#define TZX_BLOCKID_JUMP_TO_BLOCK 0x23
#define TZX_BLOCKID_CALL_SEQUENCE 0x26
#define TZX_BLOCKID_RETURN_FROM_SEQUENCE 0x27
#define TZX_BLOCKID_SELECT_BLOCK 0x28
#define TZX_BLOCKID_SET_SIGNAL_LEVEL 0x2B
#define TZX_BLOCKID_GLUE 0x5A
#define TZX_TSTATES_PER_SECOND 3500000
#define TZX_AUDIO_DATARATE 44100
#define TZX_PILOT_PULSE_LENGTH 2168
#define TZX_FIRST_SYNC_PULSE_LENGTH 667
#define TZX_SECOND_SYNC_PULSE_LENGTH 735
#define TZX_ZERO_BIT_LENGTH 885 // Spec says 855 but two different sources for other projects both use 885, suspect typo in spec.
#define TZX_ONE_BIT_LENGTH 1710
#define TZX_PILOT_PULSES_HEADER 8064 // Spec says 8063 but other apps have 8064
#define TZX_PILOT_PULSES_DATA 3220 // Spec says 3223 but other apps have 3220
typedef enum {
FileTypeUndetermined,
FileTypeTzx,
FileTypeTap,
} EFileType;
class TZXFile
{
private:
EFileType m_eFileType;
bool m_bDecodeSuccesful;
int m_nFileOffset;
int m_nFileLength;
unsigned char *m_pSourceFile;
TZXAudioGenerator *m_pAudioGenerator;
// TZX File Info
unsigned char m_nMajorRev;
unsigned char m_nMinorRev;
// Block List
int m_nBlockCount;
TZXBlock *m_pBlocks[MAX_TZX_BLOCKS];
// Looping
int m_nLoopRepitionsRemaining;
int m_nLoopFromBlockNum;
bool AddToBlockList(TZXBlock *pBlock);
bool ReadBytes(unsigned char *pDest, int nCount);
int DisplayError(int nError, void *param);
int DecodeTextDescriptionBlock();
int DecodeStandardSpeedDataBlock();
int DecodeArchiveInfoBlock();
int DecodeGroupStartBlock();
int DecodeTurboSpeedDataBlock();
int DecodeLoopStartBlock();
int DecodePureToneBlock();
int DecodePulseSequenceBlock();
int DecodeLoopEndBlock();
int DecodeGroupEndBlock();
int DecodePauseBlock();
int DecodePureDataBlock();
int DecodeHardwareTypeBlock();
int DecodeStopTheTape48KBlock();
int DecodeCustomInfoBlock();
int DecodeMessageBlock();
int DecodeTzxFile(unsigned char *pData, int nFileLength);
int DecodeTapFileData(unsigned char *pData, int nFileLength);
public:
TZXFile();
~TZXFile();
int GetBlockCount();
TZXBlock *GetBlockPtr(int nBlockNum);
EFileType DecodeFile(unsigned char *pData, int nFileLength);
int GenerateAudioData(); // This will allocate the memory
char *GetAudioBufferPtr();
int GetAudioBufferLength();
int GetAudioBufferLengthInSamples();
bool WriteAudioToUncompressedWavFile(const char *filename);
};
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