Ejemplo n.º 1
0
        /// <summary>
        /// Initializes the specified stream.
        /// </summary>
        /// <param name="stream">The stream.</param>
        private unsafe void Initialize(Stream stream)
        {
            var parser = new RiffParser(stream);

            FileFormatName = "Unknown";

            // Parse Header
            if (!parser.MoveNext() || parser.Current == null)
            {
                ThrowInvalidFileFormat();
                return;
            }

            // Check that WAVE header is present
            FileFormatName = parser.Current.Type;
            if (FileFormatName != "WAVE")
                throw new InvalidOperationException("Unsupported " + FileFormatName + " file format. Only WAVE.");

            // Parse inside the first chunk
            parser.Descend();

            // Get all the chunk
            var chunks = parser.GetAllChunks();

            // Get "fmt" chunk
            var fmtChunk = Chunk(chunks, "fmt ");
            if (fmtChunk.Size < sizeof(WaveFormat.__PcmNative))
                ThrowInvalidFileFormat();

            try
            {
                Format = WaveFormat.MarshalFrom(fmtChunk.GetData());
            }
            catch (InvalidOperationException ex)
            {
                ThrowInvalidFileFormat(ex);
            }

            switch (Format.Encoding)
            {
                case WaveFormatEncoding.Pcm:
                case WaveFormatEncoding.IeeeFloat:
                case WaveFormatEncoding.Extensible:
                case WaveFormatEncoding.Adpcm:
                    break;
                default:
                    ThrowInvalidFileFormat();
                    break;
            }

            // Check for "data" chunk
            var dataChunk = Chunk(chunks, "data");
            startPositionOfData = dataChunk.DataPosition;
            length = dataChunk.Size;

            input.Position = startPositionOfData;
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Initializes the specified stream.
        /// </summary>
        /// <param name="stream">The stream.</param>
        private unsafe void Initialize(Stream stream)
        {
            var parser = new RiffParser(stream);

            FileFormatName = "Unknown";

            // Parse Header
            if (!parser.MoveNext() || parser.Current == null)
            {
                ThrowInvalidFileFormat();
                return;
            }

            // Check that WAVE or XWMA header is present
            FileFormatName = parser.Current.Type;
            if (FileFormatName != "WAVE" && FileFormatName != "XWMA")
                throw new InvalidOperationException("Unsupported " + FileFormatName + " file format. Only WAVE or XWMA");

            // Parse inside the first chunk
            parser.Descend();

            // Get all the chunk
            var chunks = parser.GetAllChunks();

            // Get "fmt" chunk
            var fmtChunk = Chunk(chunks, "fmt ");
            if (fmtChunk.Size < sizeof(WaveFormat.__PcmNative))
                ThrowInvalidFileFormat();

            try
            {
                Format = WaveFormat.MarshalFrom(fmtChunk.GetData());
            }
            catch (InvalidOperationException ex)
            {
                ThrowInvalidFileFormat(ex);
            }

            // If XWMA
            if (FileFormatName == "XWMA")
            {
                // Check that format is Wma
                if (Format.Encoding != WaveFormatEncoding.Wmaudio2 && Format.Encoding != WaveFormatEncoding.Wmaudio3)
                    ThrowInvalidFileFormat();

                // Check for "dpds" chunk
                // Get the dpds decoded packed cumulative bytes
                var dpdsChunk = Chunk(chunks, "dpds");
                DecodedPacketsInfo = dpdsChunk.GetDataAsArray<uint>();                
            } else
            {
                switch (Format.Encoding)
                {
                    case WaveFormatEncoding.Pcm:
                    case WaveFormatEncoding.IeeeFloat:
                    case WaveFormatEncoding.Extensible:
                    case WaveFormatEncoding.Adpcm:
                        break;
                    default:
                        ThrowInvalidFileFormat();
                        break;
                }                
            }

            // Check for "data" chunk
            var dataChunk = Chunk(chunks, "data");
            startPositionOfData = dataChunk.DataPosition;
            length = dataChunk.Size;

            input.Position = startPositionOfData;
        }
Ejemplo n.º 3
0
    /// <summary>
    /// Initializes the specified stream.
    /// </summary>
    /// <param name="stream">The stream.</param>
    private unsafe void Initialize(Stream stream)
    {
        var parser = new RiffParser(stream);

        FileFormatName = "Unknown";

        // Parse Header
        if (!parser.MoveNext() || parser.Current == null)
        {
            ThrowInvalidFileFormat();
            return;
        }

        // Check that WAVE or XWMA header is present
        FileFormatName = parser.Current.Type;
        if (FileFormatName != "WAVE" && FileFormatName != "XWMA")
        {
            throw new InvalidOperationException("Unsupported " + FileFormatName + " file format. Only WAVE or XWMA");
        }

        // Parse inside the first chunk
        parser.Descend();

        // Get all the chunk
        var chunks = parser.GetAllChunks();

        // Get "fmt" chunk
        var fmtChunk = Chunk(chunks, "fmt ");

        if (fmtChunk.Size < sizeof(WaveFormat.__PcmNative))
        {
            ThrowInvalidFileFormat();
        }

        try
        {
            Format = WaveFormat.MarshalFrom(fmtChunk.GetData());
        }
        catch (InvalidOperationException ex)
        {
            ThrowInvalidFileFormat(ex);
        }

        // If XWMA
        if (FileFormatName == "XWMA")
        {
            // Check that format is Wma
            if (Format !.Encoding != WaveFormatEncoding.WindowsMediaAudio &&
                Format !.Encoding != WaveFormatEncoding.WindowsMediaAudioProfessional)
            {
                ThrowInvalidFileFormat();
            }

            // Check for "dpds" chunk
            // Get the dpds decoded packed cumulative bytes
            RiffChunk?dpdsChunk = Chunk(chunks, "dpds");
            DecodedPacketsInfo = dpdsChunk !.GetDataAsArray <uint>();
        }
        else
        {
            switch (Format !.Encoding)
            {
Ejemplo n.º 4
0
 private void Initialize(Stream stream)
 {
     RiffParser riffParser = new RiffParser(stream);
       this.FileFormatName = "Unknown";
       if (!riffParser.MoveNext() || riffParser.Current == null)
       {
     this.ThrowInvalidFileFormat((Exception) null);
       }
       else
       {
     this.FileFormatName = (string) riffParser.Current.Type;
     if (this.FileFormatName != "WAVE" && this.FileFormatName != "XWMA")
       throw new InvalidOperationException("Unsupported " + this.FileFormatName + " file format. Only WAVE or XWMA");
     riffParser.Descend();
     IList<RiffChunk> allChunks = riffParser.GetAllChunks();
     RiffChunk riffChunk1 = this.Chunk((IEnumerable<RiffChunk>) allChunks, "fmt ");
     if ((long) riffChunk1.Size < (long) sizeof (WaveFormat.__PcmNative))
       this.ThrowInvalidFileFormat((Exception) null);
     try
     {
       this.Format = WaveFormat.MarshalFrom(riffChunk1.GetData());
     }
     catch (InvalidOperationException ex)
     {
       this.ThrowInvalidFileFormat((Exception) ex);
     }
     if (this.FileFormatName == "XWMA")
     {
       if (this.Format.Encoding != WaveFormatEncoding.Wmaudio2 && this.Format.Encoding != WaveFormatEncoding.Wmaudio3)
     this.ThrowInvalidFileFormat((Exception) null);
       this.DecodedPacketsInfo = this.Chunk((IEnumerable<RiffChunk>) allChunks, "dpds").GetDataAsArray<uint>();
     }
     else
     {
       switch (this.Format.Encoding)
       {
     case WaveFormatEncoding.Extensible:
     case WaveFormatEncoding.Pcm:
     case WaveFormatEncoding.Adpcm:
     case WaveFormatEncoding.IeeeFloat:
       break;
     default:
       this.ThrowInvalidFileFormat((Exception) null);
       break;
       }
     }
     RiffChunk riffChunk2 = this.Chunk((IEnumerable<RiffChunk>) allChunks, "data");
     this.startPositionOfData = (long) riffChunk2.DataPosition;
     this.length = (long) riffChunk2.Size;
     this.input.Position = this.startPositionOfData;
       }
 }