public EncodingInfo Read(Stream raf) { //Read the infos-------------------------------------------------------- if (raf.Length == 0) { //Empty File throw new CannotReadException("Error: File empty"); } raf.Seek(0, SeekOrigin.Begin); //FLAC Header string byte[] b = new byte[4]; raf.Read(b, 0, b.Length); string flac = new string(System.Text.Encoding.ASCII.GetChars(b)); if (flac != "fLaC") { throw new CannotReadException("fLaC Header not found"); } MetadataBlockDataStreamInfo mbdsi = null; bool isLastBlock = false; while (!isLastBlock) { b = new byte[4]; raf.Read(b, 0, b.Length); MetadataBlockHeader mbh = new MetadataBlockHeader(b); if (mbh.BlockType == MetadataBlockHeader.BlockTypes.StreamInfo) { b = new byte[mbh.DataLength]; raf.Read(b, 0, b.Length); mbdsi = new MetadataBlockDataStreamInfo(b); if (!mbdsi.Valid) { throw new CannotReadException("FLAC StreamInfo not valid"); } break; } raf.Seek(raf.Position + mbh.DataLength, SeekOrigin.Begin); isLastBlock = mbh.IsLastBlock; mbh = null; //Free memory } EncodingInfo info = new EncodingInfo(); info.Duration = new TimeSpan(mbdsi.Length * TimeSpan.TicksPerSecond); info.ChannelNumber = mbdsi.ChannelNumber; info.SamplingRate = mbdsi.SamplingRate; info.EncodingType = mbdsi.EncodingType; info.ExtraEncodingInfos = ""; info.Bitrate = ComputeBitrate(mbdsi.Length, raf.Length); return(info); }
public EncodingInfo Read(Stream raf) { //Read the infos-------------------------------------------------------- if (raf.Length == 0) { //Empty File throw new CannotReadException("Error: File empty"); } raf.Seek(0, SeekOrigin.Begin); //FLAC Header string byte[] b = new byte[4]; raf.Read(b, 0, b.Length); string flac = new string(System.Text.Encoding.ASCII.GetChars(b)); if (flac != "fLaC") { throw new CannotReadException("fLaC Header not found"); } MetadataBlockDataStreamInfo mbdsi = null; bool isLastBlock = false; while (!isLastBlock) { b = new byte[4]; raf.Read(b, 0, b.Length); MetadataBlockHeader mbh = new MetadataBlockHeader(b); if (mbh.BlockType == (int) MetadataBlockHeader.BlockTypes.StreamInfo) { b = new byte[mbh.DataLength]; raf.Read(b, 0, b.Length); mbdsi = new MetadataBlockDataStreamInfo(b); if (!mbdsi.Valid) { throw new CannotReadException("FLAC StreamInfo not valid"); } break; } raf.Seek(raf.Position + mbh.DataLength, SeekOrigin.Begin); isLastBlock = mbh.IsLastBlock; mbh = null; //Free memory } EncodingInfo info = new EncodingInfo(); info.Length = mbdsi.Length; info.ChannelNumber = mbdsi.ChannelNumber; info.SamplingRate = mbdsi.SamplingRate; info.EncodingType = mbdsi.EncodingType; info.ExtraEncodingInfos = ""; info.Bitrate = ComputeBitrate(mbdsi.Length, raf.Length); return info; }