Accord.Audio.Filters.ExtractChannel.ProcessFilter C# (CSharp) Method

        protected unsafe override void ProcessFilter(Signal sourceData, Signal destinationData)
        {
            SampleFormat format = sourceData.SampleFormat;
            int channels = sourceData.Channels;
            int length = sourceData.Length;

            if (Channel < 0 || Channel > channels)
                throw new InvalidOperationException("The signal doesn't contains the specified channel.");

            if (format == SampleFormat.Format32BitIeeeFloat)
            {
                float* src = (float*)sourceData.Data.ToPointer() + Channel;
                float* dst = (float*)destinationData.Data.ToPointer();

                for (int i = 0; i < length; i++, src += channels, dst++)
                    *dst = *src;
            }
            else if (format == SampleFormat.Format16Bit)
            {
                short* src = (short*)sourceData.Data.ToPointer() + Channel;
                short* dst = (short*)destinationData.Data.ToPointer();

                for (int i = 0; i < length; i++, src += channels, dst++)
                    *dst = *src;
            }
            else if (format == SampleFormat.Format32Bit)
            {
                int* src = (int*)sourceData.Data.ToPointer() + Channel;
                int* dst = (int*)destinationData.Data.ToPointer();

                for (int i = 0; i < length; i++, src += channels, dst++)
                    *dst = *src;
            }
        }
    }