private static void ReadArchiveInfo(BinaryReader fileReader, ArchiveInfo archiveInfo)
{
archiveInfo.DataLength = fileReader.ReadUInt16();
archiveInfo.TextStringsCount = fileReader.ReadByte();
archiveInfo.TextStrings = new ArchiveInfo.ArchiveInfoText[archiveInfo.TextStringsCount];
for (int i = 0; i < archiveInfo.TextStringsCount; i++)
{
ArchiveInfo.ArchiveInfoText text = new ArchiveInfo.ArchiveInfoText();
text.LabelID = fileReader.ReadByte();
text.Length = fileReader.ReadByte();
text.Text = Encoding.GetEncoding("ISO-8859-1").GetString(fileReader.ReadBytes(text.Length));
archiveInfo.TextStrings[i] = text;
}
}
private static TzxDataBlock ReadTzxDataBlock(BinaryReader fileReader)
{
TzxDataBlock resultDataBlock = null;
byte id = fileReader.ReadByte();
TzxDataBlockType dataBlockType = TzxDataBlock.GetTZXDataBlockTypeFromID(id);
switch (dataBlockType)
{
// ID 10 - Standard Speed Data Block
case TzxDataBlockType.StandardSpeedDataBlock:
resultDataBlock = new StandardSpeedDataBlock();
ReadStandardSpeedDataBlock(fileReader, (StandardSpeedDataBlock)resultDataBlock);
break;
// ID 11 - Turbo Speed Data Block
case TzxDataBlockType.TurboSpeedDataBlock:
resultDataBlock = new TurboSpeedDataBlock();
ReadTurboSpeedDataBlock(fileReader, (TurboSpeedDataBlock)resultDataBlock);
break;
// ID 12 - Pure Tone
case TzxDataBlockType.PureTone:
resultDataBlock = new PureTone();
ReadPureTone(fileReader, (PureTone)resultDataBlock);
break;
// ID 13 - Pulse sequence
case TzxDataBlockType.PulseSequence:
resultDataBlock = new PulseSequence();
ReadPulseSequence(fileReader, (PulseSequence)resultDataBlock);
break;
// ID 14 - Pure Data Block
case TzxDataBlockType.PureDataBlock:
resultDataBlock = new PureDataBlock();
ReadPureDataBlock(fileReader, (PureDataBlock)resultDataBlock);
break;
// ID 15 - Direct Recording
case TzxDataBlockType.DirectRecording:
resultDataBlock = new DirectRecording();
ReadDirectRecording(fileReader, (DirectRecording)resultDataBlock);
break;
// ID 20 - Pause (silence) or 'Stop the Tape' command
case TzxDataBlockType.PauseOrStopTheTape:
resultDataBlock = new PauseOrStopTheTape();
ReadPauseOrStopTheTape(fileReader, (PauseOrStopTheTape)resultDataBlock);
break;
// ID 21 - Group start
case TzxDataBlockType.GroupStart:
resultDataBlock = new GroupStart();
ReadGroupStart(fileReader, (GroupStart)resultDataBlock);
break;
// ID 22 - Group end
case TzxDataBlockType.GroupEnd:
resultDataBlock = new GroupEnd();
break;
// ID 30 - Text description
case TzxDataBlockType.TextDescription:
resultDataBlock = new TextDescription();
ReadTextDescription(fileReader, (TextDescription)resultDataBlock);
break;
// ID 32 - Archive info
case TzxDataBlockType.ArchiveInfo:
resultDataBlock = new ArchiveInfo();
ReadArchiveInfo(fileReader, (ArchiveInfo)resultDataBlock);
break;
default:
throw new NotImplementedException("TZX data block ID " + id.ToString("X") + " is not yet implemented");
}
return(resultDataBlock);
}
private static TzxDataBlock ReadTzxDataBlock(BinaryReader fileReader)
{
TzxDataBlock resultDataBlock = null;
byte id = fileReader.ReadByte();
TzxDataBlockType dataBlockType = TzxDataBlock.GetTZXDataBlockTypeFromID(id);
switch (dataBlockType)
{
// ID 10 - Standard Speed Data Block
case TzxDataBlockType.StandardSpeedDataBlock:
resultDataBlock = new StandardSpeedDataBlock();
ReadStandardSpeedDataBlock(fileReader, (StandardSpeedDataBlock)resultDataBlock);
break;
// ID 11 - Turbo Speed Data Block
case TzxDataBlockType.TurboSpeedDataBlock:
resultDataBlock = new TurboSpeedDataBlock();
ReadTurboSpeedDataBlock(fileReader, (TurboSpeedDataBlock)resultDataBlock);
break;
// ID 12 - Pure Tone
case TzxDataBlockType.PureTone:
resultDataBlock = new PureTone();
ReadPureTone(fileReader, (PureTone)resultDataBlock);
break;
// ID 13 - Pulse sequence
case TzxDataBlockType.PulseSequence:
resultDataBlock = new PulseSequence();
ReadPulseSequence(fileReader, (PulseSequence)resultDataBlock);
break;
// ID 14 - Pure Data Block
case TzxDataBlockType.PureDataBlock:
resultDataBlock = new PureDataBlock();
ReadPureDataBlock(fileReader, (PureDataBlock)resultDataBlock);
break;
// ID 15 - Direct Recording
case TzxDataBlockType.DirectRecording:
resultDataBlock = new DirectRecording();
ReadDirectRecording(fileReader, (DirectRecording)resultDataBlock);
break;
// ID 20 - Pause (silence) or 'Stop the Tape' command
case TzxDataBlockType.PauseOrStopTheTape:
resultDataBlock = new PauseOrStopTheTape();
ReadPauseOrStopTheTape(fileReader, (PauseOrStopTheTape)resultDataBlock);
break;
// ID 21 - Group start
case TzxDataBlockType.GroupStart:
resultDataBlock = new GroupStart();
ReadGroupStart(fileReader, (GroupStart)resultDataBlock);
break;
// ID 22 - Group end
case TzxDataBlockType.GroupEnd:
resultDataBlock = new GroupEnd();
break;
// ID 30 - Text description
case TzxDataBlockType.TextDescription:
resultDataBlock = new TextDescription();
ReadTextDescription(fileReader, (TextDescription)resultDataBlock);
break;
// ID 32 - Archive info
case TzxDataBlockType.ArchiveInfo:
resultDataBlock = new ArchiveInfo();
ReadArchiveInfo(fileReader, (ArchiveInfo)resultDataBlock);
break;
default:
throw new NotImplementedException("TZX data block ID "+ id.ToString("X") + " is not yet implemented");
}
return resultDataBlock;
}
public static TzxFile ReadTzxFile(Stream inputStream, string fileName)
{
TzxFile resultFile = new TzxFile(fileName);
using (BinaryReader fileReader = new BinaryReader(inputStream, Encoding.GetEncoding("ISO-8859-1")))
{
string signature = Encoding.GetEncoding("ISO-8859-1").GetString(fileReader.ReadBytes(7));
if (signature != "ZXTape!")
{
throw new InvalidDataException("The signature of the file does not match the standard TZX file format");
}
else
{
resultFile.Signature = signature;
}
resultFile.EndOfTextFileMarker = fileReader.ReadByte();
resultFile.MajorRevisionNumber = fileReader.ReadByte();
resultFile.MinorRevisionNumber = fileReader.ReadByte();
TapeSection currentGroupSection = null;
while (fileReader.PeekChar() >= 0)
{
TzxDataBlock tzxBlock = ReadTzxDataBlock(fileReader);
resultFile.DataBlocks.Add(tzxBlock);
switch (tzxBlock.Type)
{
case TzxDataBlockType.StandardSpeedDataBlock:
case TzxDataBlockType.TurboSpeedDataBlock:
case TzxDataBlockType.PureTone:
case TzxDataBlockType.PulseSequence:
case TzxDataBlockType.PureDataBlock:
case TzxDataBlockType.DirectRecording:
TapeSection section = new TapeSection(tzxBlock);
if (currentGroupSection == null)
{
resultFile.Sections.Add(section);
}
else
{
foreach (TapeSoundSequence soundSequence in section.SoundSequences)
{
currentGroupSection.SoundSequences.Add(soundSequence);
}
}
break;
case TzxDataBlockType.PauseOrStopTheTape:
PauseOrStopTheTape pauseBlock = (PauseOrStopTheTape)tzxBlock;
if (pauseBlock.PauseInMs > 0)
{
section = new TapeSection(tzxBlock);
if (currentGroupSection == null)
{
resultFile.Sections.Add(section);
}
else
{
foreach (TapeSoundSequence soundSequence in section.SoundSequences)
{
currentGroupSection.SoundSequences.Add(soundSequence);
}
}
}
break;
case TzxDataBlockType.TextDescription:
TextDescription descriptionBlock = (TextDescription)tzxBlock;
resultFile.Description += descriptionBlock.Text;
break;
case TzxDataBlockType.ArchiveInfo:
ArchiveInfo archiveInfo = (ArchiveInfo)tzxBlock;
resultFile.Description += archiveInfo.ToString();
break;
case TzxDataBlockType.GroupStart:
currentGroupSection = new TapeSection(tzxBlock);
break;
case TzxDataBlockType.GroupEnd:
foreach (TapeSoundSequence soundSequence in currentGroupSection.SoundSequences)
{
currentGroupSection.Duration += soundSequence.Duration;
}
resultFile.Sections.Add(currentGroupSection);
currentGroupSection = null;
break;
}
}
}
TapeSection lastSection = resultFile.Sections[resultFile.Sections.Count - 1];
TapeSoundSequence lastSoundSequence = lastSection.SoundSequences[lastSection.SoundSequences.Count - 1];
if (lastSoundSequence.GetType() != typeof(PauseSequence))
{
lastSection.SoundSequences.Add(new PauseSequence("End of tape", 1));
}
foreach (TapeSection section in resultFile.Sections)
{
resultFile.Duration += section.Duration;
}
return(resultFile);
}
private static void ReadArchiveInfo(BinaryReader fileReader, ArchiveInfo archiveInfo)
{
archiveInfo.DataLength = fileReader.ReadUInt16();
archiveInfo.TextStringsCount = fileReader.ReadByte();
archiveInfo.TextStrings = new ArchiveInfo.ArchiveInfoText[archiveInfo.TextStringsCount];
for (int i = 0; i < archiveInfo.TextStringsCount; i++)
{
ArchiveInfo.ArchiveInfoText text = new ArchiveInfo.ArchiveInfoText();
text.LabelID = fileReader.ReadByte();
text.Length = fileReader.ReadByte();
text.Text = Encoding.GetEncoding("ISO-8859-1").GetString(fileReader.ReadBytes(text.Length));
archiveInfo.TextStrings[i] = text;
}
}
