bool ReadV2Frame( PrimitiveReader reader, ref int len )
{
string frameId = reader.ReadASCIIString( 4 ); len -= 4;
if( frameId == "\0\0\0\0" ) return true;
int frameDataSize = reader.ReadUInt24(); len -= ( frameDataSize + 3 );
Console.WriteLine( "reading frame: " + frameId );
Console.WriteLine( " skipping frame." );
reader.SkipData( frameDataSize );
return false;
}
bool ReadMetadataBlock( PrimitiveReader reader )
{
byte flags = reader.ReadByte();
bool lastBlock = ( flags & 0x80 ) != 0;
flags &= 0x7F;
MetadataBlockType blockType = (MetadataBlockType)flags;
int metaLength = reader.ReadUInt24();
switch( blockType ) {
case MetadataBlockType.StreamInfo:
ProcessMetadataStreamInfo( metaLength, reader );
break;
case MetadataBlockType.Padding:
ProcessMetadataPadding( metaLength, reader );
break;
case MetadataBlockType.Application:
ProcessMetadataApplication( metaLength, reader );
break;
case MetadataBlockType.SeekTable:
ProcessMetadataSeekTable( metaLength, reader );
break;
case MetadataBlockType.VorbisComment:
ProcessMetadataVorbisComment( metaLength, reader );
break;
case MetadataBlockType.Cuesheet:
ProcessMetadataCuesheet( metaLength, reader );
break;
case MetadataBlockType.Picture:
ProcessMetadataPicture( metaLength, reader );
break;
default:
throw new InvalidDataException( "Invalid metadata block type." );
}
return lastBlock;
}
void ProcessMetadataStreamInfo( int len, PrimitiveReader reader )
{
short minBlockSize = reader.ReadInt16();
short maxBlockSize = reader.ReadInt16();
int minFrameSize = reader.ReadUInt24();
int maxFrameSize = reader.ReadUInt24();
FlacBitReader bitReader = new FlacBitReader( reader );
bitReader.BigEndian = true;
int sampleRate = bitReader.ReadBits( 20 );
Metadata[MetadataKeys.SampleRate] = sampleRate.ToString();
int channels = bitReader.ReadBits( 3 ) + 1;
Metadata[MetadataKeys.Channels] = channels.ToString();
int bitsPerSample = bitReader.ReadBits( 5 ) + 1;
Metadata[MetadataKeys.BitsPerSample] = bitsPerSample.ToString();
long totalSamples = bitReader.ReadBits64( 36 );
Metadata["Total samples"] = totalSamples.ToString();
channelCount = channels;
metaSampleRate = sampleRate;
metaBitsPerSample = bitsPerSample;
byte[] md5hash = reader.ReadBytes( 16 );
}