Package org.mp4parser.muxer

Interface DataSource

    • Method Summary

      Modifier and Type Method Description
      void close()
      Tries to free all resources.
      ByteBuffer map​(long startPosition, long size)
      Maps a part of this DataSource into a ByteBuffer.
      long position()
      Returns the DataSource's current position.
      void position​(long nuPos)
      Sets the DataSource's position.
      int read​(ByteBuffer byteBuffer)
      Reads a sequence of bytes from this channel into the given buffer.
      long size()
      Returns the current size of this DataSource.
      long transferTo​(long position, long count, WritableByteChannel target)
      Transfers bytes from this DataSource to the given writable byte channel.

    • Method Detail

      • read

        int read​(ByteBuffer byteBuffer)
  throws IOException
        Reads a sequence of bytes from this channel into the given buffer. Bytes are read starting at this channel's current position, and then the file position is updated with the number of bytes actually read.
        Parameters:
        byteBuffer - sink for this read operation
        Returns:
        number of bytes actually read
        Throws:
        IOException - If some I/O error occurs

      • size

        long size()
   throws IOException
        Returns the current size of this DataSource.
        Returns:
        The current size of this DataSource, measured in bytes
        Throws:
        IOException - If some I/O error occurs

      • position

        long position()
       throws IOException
        Returns the DataSource's current position.
        Returns:
        This DataSource's file position, a non-negative integer counting the number of bytes from the beginning of the data to the current position
        Throws:
        IOException - If some I/O error occurs

      • position

        void position​(long nuPos)
       throws IOException
        Sets the DataSource's position.
        Parameters:
        nuPos - The new position, a non-negative integer counting the number of bytes from the beginning of the data
        Throws:
        IOException - If some I/O error occurs

      • transferTo

        long transferTo​(long position,
                long count,
                WritableByteChannel target)
         throws IOException
        Transfers bytes from this DataSource to the given writable byte channel.
        An attempt should be made to read up to count bytes starting at the given position in this DataSource and write them to the target channel. An invocation of this method may or may not transfer all of the requested bytes;
        Parameters:
        position - The position within the DataSource at which the transfer is to begin; must be non-negative
        count - The maximum number of bytes to be transferred; must be non-negative
        target - The target channel
        Returns:
        the actual number of bytes written
        Throws:
        IOException - If some I/O error occurs

      • map

        ByteBuffer map​(long startPosition,
               long size)
        throws IOException
        Maps a part of this DataSource into a ByteBuffer. It might utilize an operating system supported memory mapped file or potentially just reads the requested portion of the file into the memory.
        Parameters:
        startPosition - where the requested block start
        size - size of the requested block
        Returns:
        the requested portion of the DataSource
        Throws:
        IOException - If some I/O error occurs