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dynamically read track data

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This commit is contained in:
Jorj Bauer 2019-02-20 23:10:29 -05:00
parent 197c89b772
commit 564ccee061
3 changed files with 74 additions and 48 deletions
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2
apple/diskii.cpp
View File

@ -395,7 +395,7 @@ void DiskII::insertDisk(int8_t driveNum, const char *filename, bool drawIt)
ejectDisk(driveNum);
disk[driveNum] = new WozSerializer();
disk[driveNum]->readFile(filename, true, T_AUTO); // FIXME error checking
disk[driveNum]->readFile(filename, false, T_AUTO); // FIXME error checking
curWozTrack[driveNum] = disk[driveNum]->trackNumberForQuarterTrack(curHalfTrack[driveNum]*2);

116
apple/woz.cpp
View File

@ -33,6 +33,9 @@ Woz::Woz()
trackLoopCounter = 0;
metaData = NULL;
fh = -1;
autoFlushTrackData = false;
memset(&quarterTrackMap, 255, sizeof(quarterTrackMap));
memset(&di, 0, sizeof(diskInfo));
memset(&tracks, 0, sizeof(tracks));
@ -41,12 +44,18 @@ Woz::Woz()
Woz::~Woz()
{
// FIXME: free all the stuff
if (fh != -1)
g_filemanager->closeFile(fh);
}
uint8_t Woz::getNextWozBit(uint8_t track)
{
if (trackBitIdx == 0x80) {
if (!tracks[track].trackData) {
readAndDecodeTrack(track, fh);
}
// need another byte out of the track stream
trackByte = tracks[track].trackData[trackPointer++];
if (trackPointer >= tracks[track].bitCount / 8) {
@ -338,7 +347,21 @@ void Woz::_initInfo()
bool Woz::readAndDecodeTrack(uint8_t track, int8_t fh)
{
if (imageType == T_PO ||
// If we're going to malloc a new one, then find all the other ones
// that might be malloc'd and purge them if we're autoFlushTrackData==true
if (autoFlushTrackData == true) {
for (int i=0; i<160; i++) {
if (tracks[i].trackData) {
free(tracks[i].trackData);
tracks[i].trackData = NULL;
}
}
}
if (imageType == T_WOZ) {
return readWozTrackData(fh, track);
} else if (imageType == T_PO ||
imageType == T_DSK) {
static uint8_t sectorData[256*16];
@ -385,17 +408,20 @@ bool Woz::readAndDecodeTrack(uint8_t track, int8_t fh)
return true;
}
printf("ERROR: need to implement WOZ support in track reader\n");
#ifndef TEENSYDUINO
printf("ERROR: don't know how we reached this point\n");
#endif
return false;
}
bool Woz::readDskFile(const char *filename, bool preloadTracks, uint8_t subtype)
{
bool retval = false;
autoFlushTrackData = !preloadTracks;
imageType = subtype;
int8_t fh = g_filemanager->openFile(filename);
fh = g_filemanager->openFile(filename);
if (fh == -1) {
#ifndef TEENSYDUINO
perror("Unable to open input file");
@ -417,18 +443,17 @@ bool Woz::readDskFile(const char *filename, bool preloadTracks, uint8_t subtype)
retval = true;
done:
if (fh != -1)
g_filemanager->closeFile(fh);
return retval;
}
bool Woz::readNibFile(const char *filename, bool preloadTracks)
{
bool ret = false;
autoFlushTrackData = !preloadTracks;
imageType = T_NIB;
int8_t fh = g_filemanager->openFile(filename);
fh = g_filemanager->openFile(filename);
if (fh == -1) {
#ifndef TEENSYDUINO
perror("Unable to open input file");
@ -448,16 +473,15 @@ bool Woz::readNibFile(const char *filename, bool preloadTracks)
ret = true;
done:
if (fh != -1)
g_filemanager->closeFile(fh);
return ret;
}
bool Woz::readWozFile(const char *filename, bool preloadTracks)
{
imageType = T_WOZ;
autoFlushTrackData = !preloadTracks;
int8_t fh = g_filemanager->openFile(filename);
fh = g_filemanager->openFile(filename);
if (fh == -1) {
#ifndef TEENSYDUINO
perror("Unable to open input file");
@ -476,7 +500,6 @@ bool Woz::readWozFile(const char *filename, bool preloadTracks)
#ifndef TEENSYDUINO
printf("Unknown disk image type; can't continue\n");
#endif
g_filemanager->closeFile(fh);
return false;
}
@ -485,14 +508,12 @@ bool Woz::readWozFile(const char *filename, bool preloadTracks)
#ifndef TEENSYDUINO
printf("Read failure\n");
#endif
g_filemanager->closeFile(fh);
return false;
}
if (tmp != 0x0A0D0AFF) {
#ifndef TEENSYDUINO
printf("WOZ header failure; exiting\n");
#endif
g_filemanager->closeFile(fh);
return false;
}
uint32_t crc32;
@ -541,7 +562,6 @@ bool Woz::readWozFile(const char *filename, bool preloadTracks)
#ifndef TEENSYDUINO
printf("Unknown chunk type 0x%X; failed to read woz file\n", chunkType);
#endif
g_filemanager->closeFile(fh);
return false;
}
@ -549,7 +569,6 @@ bool Woz::readWozFile(const char *filename, bool preloadTracks)
#ifndef TEENSYDUINO
printf("Chunk parsing [0x%X] failed; exiting\n", chunkType);
#endif
g_filemanager->closeFile(fh);
return false;
}
@ -569,13 +588,11 @@ bool Woz::readWozFile(const char *filename, bool preloadTracks)
#ifndef TEENSYDUINO
printf("Failed to read QTD for track %d\n", i);
#endif
g_filemanager->closeFile(fh);
return false;
}
}
}
g_filemanager->closeFile(fh);
#ifndef TEENSYDUINO
printf("File read successful\n");
#endif
@ -774,6 +791,41 @@ bool Woz::parseMetaChunk(int8_t fh, uint32_t chunkSize)
return true;
}
bool Woz::readWozTrackData(int8_t fh, uint8_t wt)
{
// assume if it's malloc'd, then we've already read it
if (tracks[wt].trackData)
return true;
uint16_t bitsStartBlock = tracks[wt].startingBlock;
// if (tracks[targetImageTrack].trackData)
// free(tracks[targetImageTrack].trackData);
// Allocate a new buffer for this track
uint32_t count = tracks[wt].blockCount * 512;
if (di.version == 1) count = (tracks[wt].bitCount / 8) + ((tracks[wt].bitCount % 8) ? 1 : 0);
tracks[wt].trackData = (uint8_t *)calloc(count, 1);
if (!tracks[wt].trackData) {
#ifndef TEENSYDUINO
perror("Failed to alloc buf to read track magnetic data");
#endif
return false;
}
if (di.version == 1) {
g_filemanager->setSeekPosition(fh, tracks[wt].startingByte); // FIXME: no error checking
} else {
g_filemanager->setSeekPosition(fh, bitsStartBlock*512); // FIXME: no error checking
}
for (int i=0; i<count; i++) {
// FIXME: no error checking
tracks[wt].trackData[i] = g_filemanager->readByte(fh);
}
return true;
}
bool Woz::readQuarterTrackData(int8_t fh, uint8_t quartertrack)
{
uint8_t targetImageTrack = quarterTrackMap[quartertrack];
@ -782,37 +834,7 @@ bool Woz::readQuarterTrackData(int8_t fh, uint8_t quartertrack)
return true;
}
// assume if it's malloc'd, then we've already read it
if (tracks[targetImageTrack].trackData)
return true;
uint16_t bitsStartBlock = tracks[targetImageTrack].startingBlock;
// if (tracks[targetImageTrack].trackData)
// free(tracks[targetImageTrack].trackData);
// Allocate a new buffer for this track
uint32_t count = tracks[targetImageTrack].blockCount * 512;
if (di.version == 1) count = (tracks[targetImageTrack].bitCount / 8) + ((tracks[targetImageTrack].bitCount % 8) ? 1 : 0);
tracks[targetImageTrack].trackData = (uint8_t *)calloc(count, 1);
if (!tracks[targetImageTrack].trackData) {
#ifndef TEENSYDUINO
perror("Failed to alloc buf to read track magnetic data");
#endif
return false;
}
if (di.version == 1) {
g_filemanager->setSeekPosition(fh, tracks[targetImageTrack].startingByte); // FIXME: no error checking
} else {
g_filemanager->setSeekPosition(fh, bitsStartBlock*512); // FIXME: no error checking
}
for (int i=0; i<count; i++) {
// FIXME: no error checking
tracks[targetImageTrack].trackData[i] = g_filemanager->readByte(fh);
}
return true;
return readWozTrackData(fh, targetImageTrack);
}

4
apple/woz.h
View File

@ -71,6 +71,7 @@ class Woz {
bool writeTRKSChunk(uint8_t version, int8_t fh);
bool readQuarterTrackData(int8_t fh, uint8_t quartertrack);
bool readWozTrackData(int8_t fh, uint8_t wt);
bool readSectorData(uint8_t track, uint8_t sector, nibSector *sectorData);
bool readAndDecodeTrack(uint8_t track, int8_t fh);
@ -80,6 +81,9 @@ class Woz {
protected:
uint8_t imageType;
int8_t fh;
bool autoFlushTrackData;
uint8_t quarterTrackMap[40*4];
diskInfo di;
trackInfo tracks[160];