Loading Ogg Vorbis via FAudio

gistfile1.cs

        // Not profiled and undoubtedly could be improved ...
        public SoundEffect LoadOgg(Stream stream)
        {
            // Turn .ogg stream into byte buffer
            byte[] rawData = new byte[stream.Length];
            stream.Read(rawData, 0, (int)stream.Length);

            // Access byte buffer as a pointer
            GCHandle rawDataHandle = GCHandle.Alloc(rawData, GCHandleType.Pinned);
            IntPtr address = rawDataHandle.AddrOfPinnedObject();
            IntPtr output = IntPtr.Zero;
            int error;

            // Open .ogg natively via FAudio and get info
            IntPtr decoder = FAudio.stb_vorbis_open_memory(address, (int)stream.Length, out error, output);
            var info = FAudio.stb_vorbis_get_info(decoder);
            uint numSamples = FAudio.stb_vorbis_stream_length_in_samples(decoder);
            int channels = info.channels;

            // Decode .ogg natively into float buffer
            float[] floatBuffer = new float[numSamples * 2];
            FAudio.stb_vorbis_get_samples_float_interleaved(decoder, channels, floatBuffer, floatBuffer.Length);

            // Convert float buffer to byte buffer
            byte[] byteBuffer = new byte[numSamples * 4];
            for (int i = 0; i < floatBuffer.Length; i++)
            {
                short val = (short)Math.Max(Math.Min(short.MaxValue * floatBuffer[i], short.MaxValue), short.MinValue);
                var decoded = BitConverter.GetBytes(val);
                byteBuffer[i * 2] = decoded[0];
                byteBuffer[i * 2 + 1] = decoded[1];
            }

            // Create SoundEffect using byte buffer
            SoundEffect soundEffect = new SoundEffect(byteBuffer, (int)info.sample_rate, channels == 1 ? AudioChannels.Mono : AudioChannels.Stereo);
            rawDataHandle.Free();
            address = IntPtr.Zero;
            output = IntPtr.Zero;
            decoder = IntPtr.Zero;
            return soundEffect;
        }