Esempio n. 1
0
        public override long Seek(long offset, SeekOrigin origin)
        {
            if (CanSeek)
            {
                switch (origin)
                {
                case SeekOrigin.Current:
                    offset += m_position;
                    break;

                case SeekOrigin.End:
                    offset += m_length;
                    break;
                }
                if (offset == m_position)
                {
                    return(m_position); // :-)
                }
                if ((offset < 0) || (offset > m_length))
                {
                    throw new ArgumentException("Offset out of range", "offset");
                }
                if ((offset % SeekAlign) > 0)
                {
                    throw new ArgumentException(string.Format("Offset must be aligned by a value of SeekAlign ({0})", SeekAlign), "offset");
                }
                ulong SampleTime = BytePosition2SampleTime(offset);
                m_reader.SetRange(SampleTime, 0);
                m_position     = offset;
                m_BufferReader = null;
                return(offset);
            }
            else
            {
                throw new NotSupportedException();
            }
        }
Esempio n. 2
0
 public override long Seek(long offset, SeekOrigin origin)
 {
     if (CanSeek)
     {
         switch (origin)
         {
             case SeekOrigin.Current:
                 offset += m_position;
                 break;
             case SeekOrigin.End:
                 offset += m_length;
                 break;
         }
         if (offset == m_position)
         {
             return m_position; // :-)
         }
         if ((offset < 0) || (offset > m_length))
         {
             throw new ArgumentException("Offset out of range", "offset");
         }
         if ((offset % SeekAlign) > 0)
         {
             throw new ArgumentException(string.Format("Offset must be aligned by a value of SeekAlign ({0})", SeekAlign), "offset");
         }
         ulong SampleTime = BytePosition2SampleTime(offset);
         m_reader.SetRange(SampleTime, 0);
         m_position = offset;
         m_BufferReader = null;
         return offset;
     }
     else
     {
         throw new NotSupportedException();
     }
 }
Esempio n. 3
0
 public override int Read(byte[] buffer, int offset, int count)
 {
     if (m_reader != null)
     {
         int read = 0;
         if ((m_length > 0) && ((m_length - m_position) < count))
         {
             count = (int)(m_length - m_position);
         }
         if (m_BufferReader != null)
         {
             while ((m_BufferReader.Position < m_BufferReader.Length) && (read < count))
             {
                 read += m_BufferReader.Read(buffer, offset, count);
             }
         }
         while (read < count)
         {
             INSSBuffer sample     = null;
             ulong      SampleTime = 0;
             ulong      Duration   = 0;
             uint       Flags      = 0;
             try
             {
                 m_reader.GetNextSample(m_outputStream, out sample, out SampleTime, out Duration, out Flags, out m_outputNumber, out m_outputStream);
             }
             catch (COMException e)
             {
                 if (e.ErrorCode == WM.NS_E_NO_MORE_SAMPLES)
                 { //No more samples
                     if (m_outputFormat.BitsPerSample == 8)
                     {
                         while (read < count)
                         {
                             buffer[offset + read] = 0x80;
                             read++;
                         }
                     }
                     else
                     {
                         Array.Clear(buffer, offset + read, count - read);
                         read = count;
                     }
                     break;
                 }
                 else
                 {
                     throw (e);
                 }
             }
             m_BufferReader = new NSSBuffer(sample);
             read          += m_BufferReader.Read(buffer, offset + read, count - read);
         }
         if ((m_BufferReader != null) && (m_BufferReader.Position >= m_BufferReader.Length))
         {
             m_BufferReader = null;
         }
         m_position += read;
         return(read);
     }
     else
     {
         throw new ObjectDisposedException(this.ToString());
     }
 }
Esempio n. 4
0
 public override int Read(byte[] buffer, int offset, int count)
 {
     if (m_reader != null)
     {
         int read = 0;
         if ((m_length > 0) && ((m_length - m_position) < count))
         {
             count = (int)(m_length - m_position);
         }
         if (m_BufferReader != null)
         {
             while ((m_BufferReader.Position < m_BufferReader.Length) && (read < count))
             {
                 read += m_BufferReader.Read(buffer, offset, count);
             }
         }
         while (read < count)
         {
             INSSBuffer sample = null;
             ulong SampleTime = 0;
             ulong Duration = 0;
             uint Flags = 0;
             try
             {
                 m_reader.GetNextSample(m_outputStream, out sample, out SampleTime, out Duration, out Flags, out m_outputNumber, out m_outputStream);
             }
             catch (COMException e)
             {
                 if (e.ErrorCode == WM.NS_E_NO_MORE_SAMPLES)
                 { //No more samples
                     if (m_outputFormat.BitsPerSample == 8)
                     {
                         while (read < count)
                         {
                             buffer[offset + read] = 0x80;
                             read++;
                         }
                     }
                     else
                     {
                         Array.Clear(buffer, offset + read, count - read);
                         read = count;
                     }
                     break;
                 }
                 else
                 {
                     throw (e);
                 }
             }
             m_BufferReader = new NSSBuffer(sample);
             read += m_BufferReader.Read(buffer, offset + read, count - read);
         }
         if ((m_BufferReader != null) && (m_BufferReader.Position >= m_BufferReader.Length))
         {
             m_BufferReader = null;
         }
         m_position += read;
         return read;
     }
     else
     {
         throw new ObjectDisposedException(this.ToString());
     }
 }