public bool Read(BinaryReader source, AudioDataManager.SizeInfo sizeInfo, MetaDataIO.ReadTagParams readTagParams)
{
this.sizeInfo = sizeInfo;
bool result = false;
resetData();
source.BaseStream.Seek(0, SeekOrigin.Begin);
if (DSD_ID.Equals(Utils.Latin1Encoding.GetString(source.ReadBytes(4))))
{
source.BaseStream.Seek(16, SeekOrigin.Current); // Chunk size and file size
id3v2Offset = source.ReadInt64();
if (FMT_ID.Equals(Utils.Latin1Encoding.GetString(source.ReadBytes(4))))
{
source.BaseStream.Seek(8, SeekOrigin.Current); // Chunk size
formatVersion = source.ReadInt32();
if (formatVersion > 1)
{
LogDelegator.GetLogDelegate()(Log.LV_ERROR, "DSF format version " + formatVersion + " not supported");
return(result);
}
isValid = true;
source.BaseStream.Seek(8, SeekOrigin.Current); // Format ID (4), Channel type (4)
uint channels = source.ReadUInt32();
switch (channels)
{
case 1: channelsArrangement = MONO; break;
case 2: channelsArrangement = STEREO; break;
case 3: channelsArrangement = ISO_3_0_0; break;
case 4: channelsArrangement = QUAD; break;
case 5: channelsArrangement = LRCLFE; break;
case 6: channelsArrangement = ISO_3_2_0; break;
case 7: channelsArrangement = ISO_3_2_1; break;
default: channelsArrangement = UNKNOWN; break;
}
sampleRate = source.ReadUInt32();
bits = source.ReadUInt32();
ulong sampleCount = source.ReadUInt64();
duration = (double)sampleCount * 1000.0 / sampleRate;
bitrate = Math.Round(((double)(sizeInfo.FileSize - source.BaseStream.Position)) * 8 / duration); //time to calculate average bitrate
result = true;
}
// Load tag if exists
if (id3v2Offset > 0)
{
if (readTagParams.PrepareForWriting)
{
id3v2StructureHelper.AddZone(id3v2Offset, (int)(source.BaseStream.Length - id3v2Offset));
id3v2StructureHelper.AddSize(12, source.BaseStream.Length);
id3v2StructureHelper.AddIndex(20, id3v2Offset);
}
}
else
{
id3v2Offset = 0; // Switch status to "tried to read, but nothing found"
if (readTagParams.PrepareForWriting)
{
// Add EOF zone for future tag writing
id3v2StructureHelper.AddZone(source.BaseStream.Length, 0);
id3v2StructureHelper.AddSize(12, source.BaseStream.Length);
id3v2StructureHelper.AddIndex(20, source.BaseStream.Length);
}
}
}
return(result);
}
public Boolean Read(BinaryReader source, SizeInfo sizeInfo, MetaDataIO.ReadTagParams readTagParams)
{
this.sizeInfo = sizeInfo;
var result = false;
resetData();
source.BaseStream.Seek(0, SeekOrigin.Begin);
if (DSD_ID.Equals(Utils.Latin1Encoding.GetString(source.ReadBytes(4))))
{
source.BaseStream.Seek(16, SeekOrigin.Current); // Chunk size and file size
id3v2Offset = source.ReadInt64();
if (FMT_ID.Equals(Utils.Latin1Encoding.GetString(source.ReadBytes(4))))
{
source.BaseStream.Seek(8, SeekOrigin.Current); // Chunk size
formatVersion = source.ReadInt32();
if (formatVersion > 1)
{
LogDelegator.GetLogDelegate()(Log.LV_ERROR, "DSF format version " + formatVersion + " not supported");
return(result);
}
isValid = true;
source.BaseStream.Seek(8, SeekOrigin.Current); // Format ID (4), Channel type (4)
channels = source.ReadUInt32();
sampleRate = source.ReadUInt32();
bits = source.ReadUInt32();
var sampleCount = source.ReadUInt64();
duration = (Double)sampleCount * 1000.0 / sampleRate;
bitrate = Math.Round(((Double)(sizeInfo.FileSize - source.BaseStream.Position)) * 8 / duration); //time to calculate average bitrate
result = true;
}
// Load tag if exists
if (id3v2Offset > 0)
{
if (readTagParams.PrepareForWriting)
{
id3v2StructureHelper.AddZone(id3v2Offset, (Int32)(source.BaseStream.Length - id3v2Offset));
id3v2StructureHelper.AddSize(12, source.BaseStream.Length);
id3v2StructureHelper.AddIndex(20, id3v2Offset);
}
}
else
{
id3v2Offset = 0; // Switch status to "tried to read, but nothing found"
if (readTagParams.PrepareForWriting)
{
// Add EOF zone for future tag writing
id3v2StructureHelper.AddZone(source.BaseStream.Length, 0);
id3v2StructureHelper.AddSize(12, source.BaseStream.Length);
id3v2StructureHelper.AddIndex(20, source.BaseStream.Length);
}
}
}
return(result);
}
