org.jaudiotagger.audio.flac.metadatablock
Class MetadataBlockDataStreamInfo

java.lang.Object
  extended by org.jaudiotagger.audio.flac.metadatablock.MetadataBlockDataStreamInfo

public class MetadataBlockDataStreamInfo
extends java.lang.Object

Stream Info

This block has information about the whole stream, like sample rate, number of channels, total number of samples, etc. It must be present as the first metadata block in the stream. Other metadata blocks may follow, and ones that the decoder doesn't understand, it will skip. Format: Info <16> The minimum block size (in samples) used in the stream. <16> The maximum block size (in samples) used in the stream. (Minimum blocksize == maximum blocksize) implies a fixed-blocksize stream. <24> The minimum frame size (in bytes) used in the stream. May be 0 to imply the value is not known. <24> The maximum frame size (in bytes) used in the stream. May be 0 to imply the value is not known. <20> Sample rate in Hz. Though 20 bits are available, the maximum sample rate is limited by the structure of frame headers to 655350Hz. Also, a value of 0 is invalid. <3> (number of channels)-1. FLAC supports from 1 to 8 channels <5> (bits per sample)-1. FLAC supports from 4 to 32 bits per sample. Currently the reference encoder and decoders only support up to 24 bits per sample. <36> Total samples in stream. 'Samples' means inter-channel sample, i.e. one second of 44.1Khz audio will have 44100 samples regardless of the number of channels. A value of zero here means the number of total samples is unknown. <128> MD5 signature of the unencoded audio data. This allows the decoder to determine if an error exists in the audio data even when the error does not result in an invalid bitstream. NOTES * FLAC specifies a minimum block size of 16 and a maximum block size of 65535, meaning the bit patterns corresponding to the numbers 0-15 in the minimum blocksize and maximum blocksize fields are invalid.


Field Summary
static java.util.logging.Logger logger
           
static int STREAM_INFO_DATA_LENGTH
           
 
Constructor Summary
MetadataBlockDataStreamInfo(MetadataBlockHeader header, java.io.RandomAccessFile raf)
           
 
Method Summary
 int getChannelNumber()
           
 java.lang.String getEncodingType()
           
 int getLength()
           
 float getPreciseLength()
           
 int getSamplingRate()
           
 int getSamplingRatePerChannel()
           
 boolean isValid()
           
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

STREAM_INFO_DATA_LENGTH

public static final int STREAM_INFO_DATA_LENGTH
See Also:
Constant Field Values

logger

public static java.util.logging.Logger logger
Constructor Detail

MetadataBlockDataStreamInfo

public MetadataBlockDataStreamInfo(MetadataBlockHeader header,
                                   java.io.RandomAccessFile raf)
                            throws java.io.IOException
Throws:
java.io.IOException
Method Detail

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

getLength

public int getLength()

getPreciseLength

public float getPreciseLength()

getChannelNumber

public int getChannelNumber()

getSamplingRate

public int getSamplingRate()

getSamplingRatePerChannel

public int getSamplingRatePerChannel()

getEncodingType

public java.lang.String getEncodingType()

isValid

public boolean isValid()