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Main/tzx2wav.cpp

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/////////////////////////////////////////////////////////////////////
// TZX to VAV Converter v0.2 for Bloodshed Dev-C++ compiler //
// (C) 2005-2006 Francisco Javier Crespo <tzx2wav@ya.com> //
// //
// MiSTer adaptation (CSW v1 only) //
// (C) 2017 Francisco Javier Crespo <tzx2wav@ya.com> //
// //
// Originally based on source code from these works: //
// PLAYTZX v0.60b for Watcom C compiler (C) 1997-2004 Tomaz Kac //
// PLAYTZX Unix v0.12b (C) 2003 Tero Turtiainen / Fredrick Meunier //
/////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "tzx2wav.h"
#include "spi.h"
// Computer entries
const char *hwids_01[] = {
"ZX Spectrum 16k",
"ZX Spectrum 48k, Plus",
"ZX Spectrum 48k Issue 1",
"ZX Spectrum 128k (Sinclair)",
"ZX Spectrum 128k +2 (Grey case)",
"ZX Spectrum 128k +2A, +3",
"Timex Sinclair TC-2048",
"Timex Sinclair TS-2068",
"Pentagon 128",
"Sam Coupe",
"Didaktik M",
"Didaktik Gama",
"ZX-81 with 1k RAM",
"ZX-81 with 16k RAM or more",
"ZX Spectrum 128k, Spanish version",
"ZX Spectrum, Arabic version",
"TK 90-X",
"TK 95",
"Byte",
"Elwro",
"ZS Scorpion",
"Amstrad CPC 464",
"Amstrad CPC 664",
"Amstrad CPC 6128",
"Amstrad CPC 464+",
"Amstrad CPC 6128+",
"Jupiter ACE"
"Enterprise",
"Commodore 64",
"Commodore 128"
};
static const char *build= "20060225";
#define MAJREV 1 // Major revision of the format this program supports
#define MINREV 13 // Minor revision of the format this program supports
// C64 Loader defines ...
#define ROM_S_HALF 616 // ROM Loader SHORT Half Wave
#define ROM_M_HALF 896 // ROM Loader MEDIUM Half Wave
#define ROM_L_HALF 1176 // ROM Loader LONG Half Wave
#define STT_0_HALF 426 // Standard Turbo Tape BIT 0 Half Wave
#define STT_1_HALF 596 // Standard Turbo Tape BIT 1 Half Wave
// Other defines ...
static unsigned int freq = 44100; // Default Sample Frequency
static unsigned char *mem = 0; // File in Memory
static int pos; // Position in File
static int curr; // Current block that is playing
static int numblocks; // Total Num. of blocks
static unsigned long oflen; // Length of output file
static int block[2048]; // Array of Block starts
static double cycle; // Frequency / 3500000 (Z80 clock)
static int cpc=0; // Amstrad CPC tape ?
static int sam=0; // SAM Coupe tape ?
static int id; // Current Block ID
static int pilot; // Len of Pilot signal (in hp's)
static int sb_pilot; // Pilot pulse
static int sb_sync1; // Sync first half-period (hp)
static int sb_sync2; // Sync second
static int sb_bit0; // Bit-0
static int sb_bit1; // Bit-1
static int sb_pulse; // Pulse in Sequence of pulses and direct recording block
static int lastbyte; // How many bits are in last byte of data ?
static int pause_ms; // Pause after current block (in milliseconds)
static int skippause=0; // Overrides pause value in last TZX block
static int singlepulse; // Flag to activate single pulse waves
static int manchester; // Flag to activate manchester encoded waves
static unsigned char *data; // Data to be played
static int datalen; // Len of ^^^
static int datapos; // Position in ^^^
static int bitcount; // How many bits to play in current byte ?
static int sb_bit; // should we play bit 0 or 1 ?
static char databyte; // Current Byte to be replayed of the data
static signed short jump; // Relative Jump
static int not_rec; // Some blocks were not recognised ??
static int starting=1; // starting block
static int ending=0; // ending block
static int pages=0; // Waiting after each page of the info ?
static int expand=0; // Expand Groups ?
static int draw=1; // Local flag for outputing a line when in a group
static int speed;
static int loop_start=0; // Position of the last Loop Start block
static int loop_count=0; // Counter of the Loop
static int call_pos=0; // Position of the last Call Sequence block
static int call_num=0; // Number of Calls in the last Call Sequence block
static int call_cur=0; // Current Call to be made
static int num_sel; // Number of Selections in the Select block
static int jumparray[256]; // Array of all possible jumps in Select block
static int sb_bit0_f, sb_bit0_s, sb_bit1_f, sb_bit1_s, xortype, sb_finishbyte_f,
sb_finishbyte_s, sb_finishdata_f, sb_finishdata_s, num_lead_in, xorvalue;
static int trailing, sb_trailing;
static char lead_in_byte;
static int endian;
static char add_bit;
static int inv = 0;
static char tstr[255];
static char tstr2[255];
static char tstr3[255];
static char tstr4[255];
static char spdstr[255];
static char pstr[255];
static void core_write(const void *buf, int size)
{
const char *addr = (const char*)buf;
while (size--)
{
spi8(*addr++);
oflen++;
}
}
///////////////////////////////
// CSW v1.01 handling routines
///////////////////////////////
void CSW1_Init(void)
{
// Official CSW format documentation at:
// http://www.ramsoft.bbk.org/csw.html
unsigned short Revision = 0x0101;
unsigned char CompType = 1;
unsigned int Reserved = 0;
core_write("Compressed Square Wave\032", 23);
core_write(&Revision, 2); // Major & Minor revision
core_write(&freq, 2); // Sample Rate
core_write(&CompType, 1); // Compression Type
core_write(&inv, 1); // Polarity
core_write(&Reserved, 3); // Reserved bytes
}
void CSW1_Write(unsigned int samples)
{
if (samples < 256)
{
core_write(&samples, 1);
}
else
{
int zero = 0;
core_write(&zero, 1);
core_write(&samples, 4);
}
}
//////////////////////////////////
// Generic wave handling routines
//////////////////////////////////
unsigned int Samples(unsigned int n)
{
// Convert a sampling value in Z80 T-States to samples for wave output
return ((unsigned int)(0.5 + (cycle*(double)n)));
}
void PlayWave(unsigned int len)
{
CSW1_Write(len);
}
void PauseWave(unsigned int pause_ms)
{
// Waits for "pause" milliseconds
int p;
if ((!skippause) || (curr != (numblocks - 1)))
{
p = (unsigned int)((((float)pause_ms)*freq) / 1000.0);
PlayWave(p);
}
}
/////////////////////////////
// TZX Commodore 64 routines
/////////////////////////////
void PlayC64(unsigned int len)
{
PlayWave(len);
PlayWave(len);
}
void PlayC64ROMByte(char byte, int finish)
{
xorvalue = xortype;
while (bitcount)
{
if (!endian) sb_bit = byte & 0x01;
else sb_bit = byte & 0x80;
if (sb_bit)
{
if (sb_bit1_f) PlayC64(sb_bit1_f);
if (sb_bit1_s) PlayC64(sb_bit1_s);
xorvalue ^= sb_bit;
}
else
{
if (sb_bit0_f) PlayC64(sb_bit0_f);
if (sb_bit0_s) PlayC64(sb_bit0_s);
xorvalue ^= sb_bit;
}
if (!endian) byte >>= 1;
else byte <<= 1;
bitcount--;
}
if (xortype != 0xFF)
{
if (xorvalue)
{
if (sb_bit1_f) PlayC64(sb_bit1_f);
if (sb_bit1_s) PlayC64(sb_bit1_s);
}
else
{
if (sb_bit0_f) PlayC64(sb_bit0_f);
if (sb_bit0_s) PlayC64(sb_bit0_s);
}
}
if (!finish)
{
if (sb_finishbyte_f) PlayC64(sb_finishbyte_f);
if (sb_finishbyte_s) PlayC64(sb_finishbyte_s);
}
else
{
if (sb_finishdata_f) PlayC64(sb_finishdata_f);
if (sb_finishdata_s) PlayC64(sb_finishdata_s);
}
}
void PlayC64TurboByte(char byte)
{
int add_num;
add_num = add_bit & 3;
if (add_num && !(add_bit & 4))
{
while (add_num)
{
if (add_bit & 8) PlayC64(sb_bit1);
else PlayC64(sb_bit0);
add_num--;
}
}
while (bitcount)
{
if (!endian) sb_bit = byte & 0x01;
else sb_bit = byte & 0x80;
if (sb_bit) PlayC64(sb_bit1);
else PlayC64(sb_bit0);
if (!endian) byte >>= 1;
else byte <<= 1;
bitcount--;
}
if (add_num && (add_bit & 4))
{
while (add_num)
{
if (add_bit & 8) PlayC64(sb_bit1);
else PlayC64(sb_bit0);
add_num--;
}
}
}
////////////////////////////////
// Game identification routines
////////////////////////////////
void GetC64ROMName(char *name, unsigned char *data)
{
char d;
int n = 0;
for (; n < 16; n++)
{
d = data[14 + n];
if (d < 32 || d>125)
name[n] = ' ';
else
name[n] = d;
}
name[n] = 0;
}
void GetC64StandardTurboTapeName(char *name, unsigned char *data)
{
char d;
int n = 0;
for (; n < 16; n++)
{
d = data[15 + n];
if (d < 32 || d>125)
name[n] = ' ';
else
name[n] = d;
}
name[n] = 0;
}
void IdentifyC64ROM(int pos, unsigned char *data, int type)
{
char name[255];
// Determine Loader type
if ((sb_pilot == ROM_S_HALF) && (sb_sync1 == ROM_L_HALF) && (sb_sync2 == ROM_M_HALF) &&
(sb_bit0_f == ROM_S_HALF) && (sb_bit0_s == ROM_M_HALF) && (sb_bit1_f == ROM_M_HALF) &&
(sb_bit1_s == ROM_S_HALF) && (xortype == 0x01))
{
// ROM Loader
if ((data[0] == 0x89) && (data[1] == 0x88) && (data[2] == 0x87) && (data[3] == 0x86) &&
(data[4] == 0x85) && (data[5] == 0x84) && (data[6] == 0x83) && (data[7] == 0x82) &&
(data[8] == 0x81))
{
if (pos == 202)
{
if (!type)
{
strcpy(name, "Header: ");
GetC64ROMName(name + 8, data);
}
else
{
strcpy(name, "ROM Header: ");
GetC64ROMName(name + 12, data);
}
}
else
{
if (!type)
{
strcpy(name, "Data Block ");
}
else
{
strcpy(name, "ROM: Data Block");
}
}
}
else
{
if (!type) strcpy(name, "------------------------");
else strcpy(name, "ROM: Last Block Repeated");
}
strcpy(tstr, name);
strcpy(spdstr, "C64 ROM Data ");
return;
}
if (!type) strcpy(tstr, "------------------------");
else strcpy(tstr, "Unknown");
strcpy(spdstr, "C64 Data ");
}
void IdentifyC64Turbo(int pos, unsigned char *data, int type)
{
char name[255];
// Determine Loader type
if (sb_bit0 == STT_0_HALF && sb_bit1 == STT_1_HALF && lead_in_byte == 0x02)
{
// Standard Turbo Tape Loader
if (data[0] == 0x09 && data[1] == 0x08 && data[2] == 0x07 && data[3] == 0x06 &&
data[4] == 0x05 && data[5] == 0x04 && data[6] == 0x03 && data[7] == 0x02 &&
data[8] == 0x01)
{
if (pos == 32 && data[9] != 0x00)
{
if (!type)
{
strcpy(name, "Header: ");
GetC64StandardTurboTapeName(name + 8, data);
}
else
{
strcpy(name, "TurboTape Header: ");
GetC64StandardTurboTapeName(name + 18, data);
}
}
else
{
if (!type) strcpy(name, "------------------------");
else strcpy(name, "TurboTape Data Block");
}
}
else
{
if (!type) strcpy(name, "------------------------");
else strcpy(name, "TurboTape Unknown");
}
strcpy(tstr, name);
strcpy(spdstr, "C64 Turbo ");
return;
}
if (!type) strcpy(tstr, "------------------------");
else strcpy(tstr, "Unknown");
strcpy(spdstr, "C64 Data ");
}
void Identify(int len, unsigned char *temp, int type)
{
int n;
int s;
if (cpc)
{
if (temp[0] == 44)
{
if (!type) s = 4;
else s = 0;
strcpy(tstr, " ");
for (n = 0; n < 16; n++)
{
if (temp[n + 1]) tstr[n + s] = temp[n + 1];
else tstr[n + s] = ' ';
}
for (n = 0; n < 4; n++) tstr[n + s + 16] = ' ';
tstr[n + s + 16] = 0;
}
else
{
if (!type)
strcpy(tstr, " ------------------ ");
else
strcpy(tstr, "Headerless");
}
return;
}
if (sam)
{
if (temp[0] == 1 && (len>80 && len < 84) && (temp[1] >= 0x10 && temp[1] <= 0x13))
{
if (!type)
{
s = 14;
switch (temp[1])
{
case 0x10: strcpy(tstr, " Program : "); break;
case 0x11: strcpy(tstr, " Num. Array : "); break;
case 0x12: strcpy(tstr, "Char. Array : "); break;
case 0x13: strcpy(tstr, " Bytes : "); break;
}
}
else
{
switch (temp[1])
{
case 0x10: strcpy(tstr, "Program : "); s = 10; break;
case 0x11: strcpy(tstr, "Num. Array : "); s = 13; break;
case 0x12: strcpy(tstr, "Char. Array : "); s = 14; break;
case 0x13: strcpy(tstr, "Bytes : "); s = 8; break;
}
}
for (n = 0; n < 10; n++)
{
if (temp[n + 2]>31 && temp[n + 2] < 127)
tstr[n + s] = temp[n + 2];
else
tstr[n + s] = 32;
}
tstr[n + s] = 0;
}
else
{
if (!type)
strcpy(tstr, " --------------------"); // Not Header
else
strcpy(tstr, "Headerless");
}
return;
}
if (temp[0] == 0 && (len == 19 || len == 20) && temp[1] < 4)
{
if (!type)
{
s = 14;
switch (temp[1])
{
case 0x00: strcpy(tstr, " Program : "); break;
case 0x01: strcpy(tstr, " Num. Array : "); break;
case 0x02: strcpy(tstr, "Char. Array : "); break;
case 0x03: strcpy(tstr, " Bytes : "); break;
}
}
else
{
switch (temp[1])
{
case 0x00: strcpy(tstr, "Program : "); s = 10; break;
case 0x01: strcpy(tstr, "Num. Array : "); s = 13; break;
case 0x02: strcpy(tstr, "Char. Array : "); s = 14; break;
case 0x03: strcpy(tstr, "Bytes : "); s = 8; break;
}
}
for (n = 0; n < 10; n++)
{
if (temp[n + 2]>31 && temp[n + 2] < 127)
tstr[n + s] = temp[n + 2];
else
tstr[n + s] = 32;
}
tstr[n + s] = 0;
}
else
{
if (!type)
strcpy(tstr, " --------------------"); // Not Header
else
strcpy(tstr, "Headerless");
}
}
//////////////////////////////////////////////////////////
// Conversion routines to fetch bytes in Big Endian order
//////////////////////////////////////////////////////////
unsigned int Get2(unsigned char *pointer)
{
return (pointer[0] | (pointer[1] << 8));
}
unsigned int Get3(unsigned char *pointer)
{
return (pointer[0] | (pointer[1] << 8) | (pointer[2] << 16));
}
unsigned int Get4(unsigned char *pointer)
{
return (pointer[0] | (pointer[1] << 8) | (pointer[2] << 16) | (pointer[3] << 24));
}
/////////////////////////
// Miscelaneous routines
/////////////////////////
void CopyString(char *destination, unsigned char *source, unsigned int len)
{
// Could just use strcpy ...
unsigned int n;
for (n = 0; n < len; n++)
destination[n] = source[n];
destination[n] = 0;
}
void MakeFixedString(char *s, int i)
{
// This will create a fixed length string from null-terminated one...
int n = 0;
int k = 0;
while (i)
{
if (!s[n]) k = 1;
if (k) s[n] = ' ';
n++;
i--;
}
s[n] = 0;
}
///////////////////////////////
// TZX Blocks Parsing routines
///////////////////////////////
void Analyse_ID10(void) // Standard Loading Data block
{
pause_ms = Get2(&data[0]);
datalen = Get2(&data[2]);
data += 4;
if (data[0] == 0x00) pilot = 8064;
else pilot = 3220;
sb_pilot = Samples(2168);
sb_sync1 = Samples(667);
sb_sync2 = Samples(735);
sb_bit0 = Samples(885);
sb_bit1 = Samples(1710);
lastbyte = 8;
}
void Analyse_ID11(void) // Custom Loading Data block
{
sb_pilot = Samples(Get2(&data[0]));
sb_sync1 = Samples(Get2(&data[2]));
sb_sync2 = Samples(Get2(&data[4]));
sb_bit0 = Samples(Get2(&data[6]));
sb_bit1 = Samples(Get2(&data[8]));
speed = (int)((1710.0 / (double)Get2(&data[8]))*100.0);
pilot = Get2(&data[10]);
lastbyte = (int)data[12];
pause_ms = Get2(&data[13]);
datalen = Get3(&data[15]);
data += 18;
}
void Analyse_ID12(void) // Pure Tone
{
sb_pilot = Samples(Get2(&data[0]));
pilot = Get2(&data[2]);
if (draw) printf(" Pure Tone Length: %5d\n", pilot);
while (pilot)
{
PlayWave(sb_pilot);
pilot--;
}
}
void Analyse_ID13(void) // Sequence of Pulses
{
pilot = (int)data[0]; data++;
if (draw) printf(" Sequence of Pulses Length: %5d\n", pilot);
while (pilot)
{
sb_pulse = Samples(Get2(&data[0]));
PlayWave(sb_pulse);
pilot--;
data += 2;
}
}
void Analyse_ID14(void) // Pure Data
{
sb_pilot = pilot = sb_sync1 = sb_sync2 = 0;
sb_bit0 = Samples(Get2(&data[0]));
sb_bit1 = Samples(Get2(&data[2]));
speed = (int)((1710.0 / (double)Get2(&data[2]))*100.0);
lastbyte = (int)data[4];
pause_ms = Get2(&data[5]);
datalen = Get3(&data[7]);
data += 10;
}
void Analyse_ID15(void) // Direct Recording
{
// For now the BEST way is to use the sample frequency for replay that is
// exactly the SAME as the Original Freq. used when sampling this block !
// i.e. NO downsampling is handled YET ... use TAPER when you need it ! ;-)
sb_pulse = Samples(Get2(&data[0]));
if (!sb_pulse) sb_pulse = 1; // In case sample frequency > 44100
pause_ms = Get2(&data[2]); // (Should work for frequencies upto 48000)
lastbyte = (int)data[4];
datalen = Get3(&data[5]);
if (draw) printf(" Direct Recording Length:%6d Original Freq.: %5d Hz\n",
datalen, (int)(0.5 + (3500000.0 / (double)Get2(&data[0]))));
data = &data[8];
datapos = 0;
// Replay Direct Recording block ...
while (datalen)
{
if (datalen != 1) bitcount = 8;
else bitcount = lastbyte;
databyte = data[datapos];
while (bitcount)
{
PlayWave(sb_pulse);
databyte <<= 1;
bitcount--;
}
datalen--;
datapos++;
}
if (pause_ms) PauseWave(pause_ms);
}
void Analyse_ID16(void) // C64 ROM Type Data Block
{
data += 4;
sb_pilot = Get2(&data[0]);
pilot = Get2(&data[2]);
sb_sync1 = Get2(&data[4]);
sb_sync2 = Get2(&data[6]);
sb_bit0_f = Get2(&data[8]);
sb_bit0_s = Get2(&data[10]);
sb_bit1_f = Get2(&data[12]);
sb_bit1_s = Get2(&data[14]);
xortype = (int)(data[16]);
sb_finishbyte_f = Get2(&data[17]);
sb_finishbyte_s = Get2(&data[19]);
sb_finishdata_f = Get2(&data[21]);
sb_finishdata_s = Get2(&data[23]);
sb_trailing = Get2(&data[25]);
trailing = Get2(&data[27]);
lastbyte = (int)(data[29]);
endian = data[30];
pause_ms = Get2(&data[31]);
datalen = Get3(&data[33]);
data += 36;
IdentifyC64ROM(datalen, data, 1);
}
void Analyse_ID17(void) // C64 Turbo Tape Data Block
{
data += 4;
sb_bit0 = Get2(&data[0]);
sb_bit1 = Get2(&data[2]);
add_bit = data[4];
num_lead_in = Get2(&data[5]);
lead_in_byte = data[7];
lastbyte = (int)data[8];
endian = data[9];
trailing = Get2(&data[10]);
sb_trailing = data[12];
pause_ms = Get2(&data[13]);
datalen = Get3(&data[15]);
data += 18;
IdentifyC64Turbo(datalen, data, 1);
}
void Analyse_ID20(void) // Pause or Stop the Tape command
{
pause_ms = Get2(&data[0]);
if (pause_ms)
{
if (draw) printf(" Pause Length: %2.3fs\n", ((float)pause_ms) / 1000.0);
PauseWave(pause_ms);
}
else
{
if (draw) printf(" Stop the tape command!\n");
PauseWave(2000); // 2 seconds of pause in "Stop Tape" wave output
}
}
void Analyse_ID21(void) // Group Start
{
CopyString(pstr, &data[1], data[0]);
if (draw) printf(" Group: %s\n", pstr);
if (!expand) draw = 0;
}
void Analyse_ID22(void) // Group End
{
if (draw) printf(" Group End\n");
draw = 1;
}
void Analyse_ID23(void) // Jump To Relative
{
jump = (signed short)(data[0] + data[1] * 256);
if (draw) printf(" Jump Relative: %d (To Block %d)\n", jump, curr + jump + 1);
curr += jump;
curr--;
}
void Analyse_ID24(void) // Loop Start
{
loop_start = curr;
loop_count = Get2(&data[0]);
if (draw) printf(" Loop Start, Counter: %d\n", loop_count);
}
void Analyse_ID25(void) // Loop End
{
loop_count--;
if (loop_count > 0)
{
if (draw) printf(" Loop End, Still To Go %d Time(s)!\n", loop_count);
curr = loop_start;
}
else
{
if (draw) printf(" Loop End, Finished\n");
}
}
void Analyse_ID26(void) // Call Sequence
{
call_pos = curr;
call_num = Get2(&data[0]);
call_cur = 0;
jump = (signed short)(data[2] + data[3] * 256);
if (draw) printf(" Call Sequence, Number of Calls : %d, First: %d (To Block %d)\n", call_num, jump, curr + jump + 1);
curr += jump;
curr--;
}
void Analyse_ID27(void) // Return from Sequence
{
call_cur++;
if (call_cur == call_num)
{
if (draw) printf(" Return from Call, Last Call Finished\n");
curr = call_pos;
}
else
{
curr = call_pos;
data = &mem[block[curr] + 1];
jump = (signed short)(data[call_cur * 2 + 2] + data[call_cur * 2 + 3] * 256);
if (draw) printf(" Return from Call, Calls Left: %d, Next: %d (To Block %d)\n",
call_num - call_cur, jump, curr + jump + 1);
curr += jump;
curr--;
}
}
void Analyse_ID28(void) // Select Block
{
num_sel = data[2];
printf(" Select :\n");
data += 3;
for (int n = 0; n < num_sel; n++)
{
jump = (signed short)(data[0] + data[1] * 256);
jumparray[n] = jump;
CopyString(spdstr, &data[3], data[2]);
printf("%5d : %s\n", n + 1, spdstr);
data += 3 + data[2];
}
//no interactive shell. choose 1.
PauseWave(200);
int k = 1;
/*
printf(">> Press the number!\n");
PauseWave(5000); // Why?!?!?!?!
k = getchar();
if (k == 27) Error("ESCAPE key pressed!");
k -= 48;
if (k<1 || k>num_sel) printf("Illegal Selection... Continuing...\n");
else
*/
{
curr += jumparray[k - 1];
curr--;
}
}
void Analyse_ID2A(void) // Stop the tape if in 48k mode
{
if (draw) printf(" Stop the tape in 48k mode!\n");
PauseWave(3000);
}
void Analyse_ID30(void) // Description
{
CopyString(pstr, &data[1], data[0]);
if (draw) printf(" Description: %s\n", pstr);
}
void Analyse_ID31(void) // Message
{
CopyString(pstr, &data[2], data[1]);
// Pause in Message block is ignored ...
if (draw) printf(" Message: %s\n", pstr);
}
void Analyse_ID32(void) // Archive Info
{
if (draw)
{
if (data[3] == 0)
{
CopyString(spdstr, &data[5], data[4]);
sprintf(tstr, " Title: %s", spdstr);
MakeFixedString(tstr, 69);
strcpy(tstr + 52, " (-v for more)");
printf("%s\n", tstr);
}
else
{
sprintf(tstr, " Archive Info");
MakeFixedString(tstr, 69);
strcpy(tstr + 52, " (-v for more)");
printf("%s\n", tstr);
}
}
}
void Analyse_ID33(void) // Hardware Info
{
if (data[1] == 0 && data[2] > 0x14 && data[2] < 0x1a && data[3] == 1) cpc = 1;
if (data[1] == 0 && data[2] == 0x09 && data[3] == 1) sam = 1;
if (draw)
{
if (data[1] != 0 || data[3] != 1)
{
sprintf(tstr, " Hardware Type");
MakeFixedString(tstr, 69);
strcpy(tstr + 52, " (-v for more)");
printf("%s\n", tstr);
}
else
{
printf(" This tape is made for %s !\n", hwids_01[data[2]]);
}
}
}
void Analyse_ID34(void) // Emulation info
{
if (draw) printf(" Information for emulators.\n");
}
void Analyse_ID35(void) // Custom Info
{
CopyString(pstr, data, 16);
if (draw)
{
if (strcmp(pstr, "POKEs "))
printf(" Custom Info: %s\n", pstr);
// Only Name of Custom info except POKEs is used ...
else
{
sprintf(tstr, " Custom Info: %s", pstr);
MakeFixedString(tstr, 69);
strcpy(tstr + 52, " (-v for more)");
printf("%s\n", tstr);
}
}
}
void Analyse_ID40(void) // Snapshot
{
if (draw) printf(" Snapshot (Not Supported yet)\n");
}
void Analyse_ID5A(void) // ZXTape!
{
if (draw) printf(" Start of the new tape (Merged Tapes)\n");
}
void Analyse_Unknown(void) // Unknown blocks
{
if (draw) printf(" Unknown block %02X !\n", id);
}
////////////////////////
// Main TZX2WAV program
////////////////////////
int tzx2csw(fileTYPE *f)
{
freq = 44100;
starting = 1;
ending = 0;
expand = 0;
skippause = 0;
inv = 0;
oflen = 0;
mem = (unsigned char *)malloc(f->size);
if (mem == NULL)
{
printf("\n-- Not enough memory to load the file!");
return 0;
}
// Start reading file...
FileReadAdv(f, mem, 10);
mem[7] = 0;
if (strcmp((const char*)mem, "ZXTape!"))
{
printf("\n-- File is not in ZXTape format!");
free(mem);
return 0;
}
printf("\nZXTape file revision %d.%02d\n", mem[8], mem[9]);
if (!mem[8])
{
printf("\n-- Development versions of ZXTape format are not supported!");
free(mem);
return 0;
}
if (mem[8] > MAJREV) printf("\n-- Warning: Some blocks may not be recognised and used!\n");
if (mem[8] == MAJREV && mem[9] > MINREV) printf("\n-- Warning: Some of the data might not be properly recognised!\n");
FileReadAdv(f, mem, f->size - 10);
numblocks = 0; pos = 0;
not_rec = 0;
// Go through the file and record block starts ...
// (not necessary, could just go right through it)
while (pos < f->size - 10)
{
block[numblocks] = pos;
pos++;
switch (mem[pos - 1])
{
case 0x10: pos += Get2(&mem[pos + 0x02]) + 0x04; break;
case 0x11: pos += Get3(&mem[pos + 0x0F]) + 0x12; break;
case 0x12: pos += 0x04; break;
case 0x13: pos += (mem[pos + 0x00] * 0x02) + 0x01; break;
case 0x14: pos += Get3(&mem[pos + 0x07]) + 0x0A; break;
case 0x15: pos += Get3(&mem[pos + 0x05]) + 0x08; break;
case 0x16: pos += Get4(&mem[pos + 0x00]) + 0x04; break;
case 0x17: pos += Get4(&mem[pos + 0x00]) + 0x04; break;
case 0x20: pos += 0x02; break;
case 0x21: pos += mem[pos + 0x00] + 0x01; break;
case 0x22: break;
case 0x23: pos += 0x02; break;
case 0x24: pos += 0x02; break;
case 0x25: break;
case 0x26: pos += Get2(&mem[pos + 0x00]) * 0x02 + 0x02; break;
case 0x27: break;
case 0x28: pos += Get2(&mem[pos + 0x00]) + 0x02; break;
case 0x2A: pos += 0x04; break;
case 0x30: pos += mem[pos + 0x00] + 0x01; break;
case 0x31: pos += mem[pos + 0x01] + 0x02; break;
case 0x32: pos += Get2(&mem[pos + 0x00]) + 0x02; break;
case 0x33: pos += (mem[pos + 0x00] * 0x03) + 0x01; break;
case 0x34: pos += 0x08; break;
case 0x35: pos += Get4(&mem[pos + 0x10]) + 0x14; break;
case 0x40: pos += Get3(&mem[pos + 0x01]) + 0x04; break;
case 0x5A: pos += 0x09; break;
default: pos += Get4(&mem[pos + 0x00]) + 0x04;
not_rec = 1;
}
numblocks++;
}
printf("Number of Blocks: %d\n", numblocks);
if (not_rec)
{
printf("\n-- Warning: Some blocks were *NOT* recognised!\n");
}
curr = 0;
if (starting > 1)
{
if (starting > numblocks)
{
printf("\n-- Invalid Starting Block");
free(mem);
return 0;
}
curr = starting - 1;
}
if (ending > 0)
{
if (ending > numblocks || ending < starting)
{
printf("\n-- Invalid Ending Block");
free(mem);
return 0;
}
numblocks = ending;
}
printf("\nCreating CSW v1");
printf(" file using %d Hz frequency ...\n\n", freq);
CSW1_Init();
singlepulse = 0;
manchester = 0;
cycle = (double)freq / 3500000.0; // This is for the conversion later ...
/////////////////////////////////////////////////////
// Start replay of blocks (Main loop of the program)
/////////////////////////////////////////////////////
while (curr < numblocks)
{
if (draw) printf("Block %03d:", curr + 1);
id = mem[block[curr]];
data = &mem[block[curr] + 1];
switch (id)
{
case 0x10: Analyse_ID10(); // Standard Loading Data block
break;
case 0x11: Analyse_ID11(); // Custom Loading Data block
break;
case 0x12: Analyse_ID12(); // Pure Tone
break;
case 0x13: Analyse_ID13(); // Sequence of Pulses
break;
case 0x14: Analyse_ID14(); // Pure Data
break;
case 0x15: Analyse_ID15(); // Direct Recording
break;
case 0x16: Analyse_ID16(); // C64 ROM Type Data Block
break;
case 0x17: Analyse_ID17(); // C64 Turbo Tape Data Block
break;
case 0x20: Analyse_ID20(); // Pause or Stop the Tape command
break;
case 0x21: Analyse_ID21(); // Group Start
break;
case 0x22: Analyse_ID22(); // Group End
break;
case 0x23: Analyse_ID23(); // Jump To Relative
break;
case 0x24: Analyse_ID24(); // Loop Start
break;
case 0x25: Analyse_ID25(); // Loop End
break;
case 0x26: Analyse_ID26(); // Call Sequence
break;
case 0x27: Analyse_ID27(); // Return from Sequence
break;
case 0x28: Analyse_ID28(); // Select Block
break;
case 0x2A: Analyse_ID2A(); // Stop the tape if in 48k mode
break;
case 0x30: Analyse_ID30(); // Description
break;
case 0x31: Analyse_ID31(); // Message
break;
case 0x32: Analyse_ID32(); // Archive Info
break;
case 0x33: Analyse_ID33(); // Hardware Info
break;
case 0x34: Analyse_ID34(); // Emulation info
break;
case 0x35: Analyse_ID35(); // Custom Info
break;
case 0x40: Analyse_ID40(); // Snapshot
break;
case 0x5A: Analyse_ID5A(); // ZXTape!
break;
default: Analyse_Unknown(); // Unknown blocks
}
// TZX file blocks analysis finished
// Now we start generating the sound waves
if ((id == 0x10 || id == 0x11 || id == 0x14)) // One of the data blocks ...
{
if (id != 0x14) Identify(datalen, data, 0);
else strcpy(tstr, " Pure Data ");
if (id == 0x10) sprintf(spdstr, "Normal Speed");
else sprintf(spdstr, " Speed: %3d%%", speed);
sprintf(pstr, "Pause: %5d ms", pause_ms);
if (draw) printf("%s Length:%6d %s %s\n", tstr, datalen, spdstr, pstr);
{
while (pilot) // Play PILOT TONE
{
PlayWave(sb_pilot);
pilot--;
}
if (sb_sync1) // Play first SYNC pulse
{
PlayWave(sb_sync1);
}
if (sb_sync2) // Play second SYNC pulse
{
PlayWave(sb_sync2);
}
datapos = 0;
while (datalen) // Play actual DATA
{
if (datalen != 1) bitcount = 8;
else bitcount = lastbyte;
databyte = data[datapos];
while (bitcount)
{
if (databyte & 0x80) sb_bit = sb_bit1;
else sb_bit = sb_bit0;
PlayWave(sb_bit); // Play first pulse of the bit
if (!singlepulse)
{
PlayWave(sb_bit); // Play second pulse of the bit
}
databyte <<= 1;
bitcount--;
}
datalen--; datapos++;
}
singlepulse = 0; // Reset flag for next TZX blocks
// If there is pause after block present then make first millisecond the oposite
// pulse of last pulse played and the rest in LOAMP ... otherwise don't do ANY pause
if (pause_ms)
{
PauseWave(1);
if (pause_ms > 1) PauseWave(pause_ms - 1);
}
}
}
if (id == 0x16) // C64 ROM data block ...
{
IdentifyC64ROM(datalen, data, 0);
sprintf(pstr, "Pause: %5d ms", pause_ms);
if (draw) printf(" %s Length:%6d %s %s\n", tstr, datalen, spdstr, pstr);
{
sb_pilot = Samples(sb_pilot);
sb_sync1 = Samples(sb_sync1); sb_sync2 = Samples(sb_sync2);
sb_bit1_f = Samples(sb_bit1_f); sb_bit1_s = Samples(sb_bit1_s);
sb_bit0_f = Samples(sb_bit0_f); sb_bit0_s = Samples(sb_bit0_s);
sb_finishbyte_f = Samples(sb_finishbyte_f);
sb_finishbyte_s = Samples(sb_finishbyte_s);
sb_finishdata_f = Samples(sb_finishdata_f);
sb_finishdata_s = Samples(sb_finishdata_s);
sb_trailing = Samples(sb_trailing);
num_lead_in = 0;
while (pilot) // Play PILOT TONE
{
PlayC64(sb_pilot);
pilot--;
}
if (sb_sync1) PlayC64(sb_sync1); // Play SYNC PULSES
if (sb_sync2) PlayC64(sb_sync2);
datapos = 0;
while (datalen) // Play actual DATA
{
if (datalen != 1)
{
bitcount = 8;
PlayC64ROMByte(data[datapos], 0);
}
else
{
bitcount = lastbyte;
PlayC64ROMByte(data[datapos], 1);
}
databyte = data[datapos];
datalen--; datapos++;
}
while (trailing) // Play TRAILING TONE
{
PlayC64(sb_trailing);
trailing--;
}
// If there is pause after block present then make first millisecond the oposite
// pulse of last pulse played and the rest in LOAMP ... otherwise don't do ANY pause
if (pause_ms)
{
PauseWave(pause_ms / 2);
PauseWave((pause_ms / 2) + (pause_ms % 2));
}
}
}
if (id == 0x17) // C64 Turbo Tape data block ...
{
IdentifyC64Turbo(datalen, data, 0);
sprintf(pstr, "Pause: %5d ms", pause_ms);
if (draw) printf(" %s Length:%6d %s %s\n", tstr, datalen, spdstr, pstr);
{
sb_bit1 = Samples(sb_bit1);
sb_bit0 = Samples(sb_bit0);
while (num_lead_in) // Play Lead In bytes
{
bitcount = 8;
PlayC64TurboByte(lead_in_byte);
num_lead_in--;
}
datapos = 0;
while (datalen) // Play actual DATA
{
if (datalen != 1) bitcount = 8;
else bitcount = lastbyte;
PlayC64TurboByte(data[datapos]);
databyte = data[datapos];
datalen--; datapos++;
}
while (trailing) // Play Trailing bytes
{
bitcount = 8;
PlayC64TurboByte((unsigned char)sb_trailing);
trailing--;
}
// If there is pause after block present then make first millisecond the oposite
// pulse of last pulse played and the rest in LOAMP ... otherwise don't do ANY pause
if (pause_ms)
{
PauseWave(pause_ms / 2);
PauseWave((pause_ms / 2) + (pause_ms % 2));
}
}
}
curr++; // We continue to replay the next TZX block
} // This is the main loop end
PauseWave(200); // Finish always with 200 ms of pause after the last block
printf("\n%d bytes sent to the core.\n", oflen);
free(mem);
return 1;
}
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