public static unsafe int[] GetChannelMap(AudioChannelLayout inputLayout, AudioChannelLayout outputLayout)
{
if (inputLayout == null)
throw new ArgumentNullException ("inputLayout");
if (outputLayout == null)
throw new ArgumentNullException ("outputLayout");
var channels_count = GetNumberOfChannels (outputLayout);
if (channels_count == null)
throw new ArgumentException ("outputLayout");
int ptr_size;
var input_ptr = inputLayout.ToBlock (out ptr_size);
var output_ptr = outputLayout.ToBlock (out ptr_size);
var array = new IntPtr[] { input_ptr, output_ptr };
ptr_size = sizeof (IntPtr) * array.Length;
int[] value;
AudioFormatError res;
fixed (IntPtr* ptr = &array[0]) {
value = new int[channels_count.Value];
var size = sizeof (int) * value.Length;
fixed (int* value_ptr = &value[0]) {
res = AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.ChannelMap, ptr_size, ptr, ref size, value_ptr);
}
}
Marshal.FreeHGlobal (input_ptr);
Marshal.FreeHGlobal (output_ptr);
return res == 0 ? value : null;
}
public static AudioFormatError Validate(AudioChannelLayout layout)
{
if (layout == null)
throw new ArgumentNullException ("layout");
int ptr_size;
var ptr = layout.ToBlock (out ptr_size);
var res = AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.ValidateChannelLayout, ptr_size, ptr, IntPtr.Zero, IntPtr.Zero);
Marshal.FreeHGlobal (ptr);
return res;
}
public unsafe static float[,] GetMatrixMixMap(AudioChannelLayout inputLayout, AudioChannelLayout outputLayout)
{
if (inputLayout == null)
{
throw new ArgumentNullException("inputLayout");
}
if (outputLayout == null)
{
throw new ArgumentNullException("outputLayout");
}
var channels_count_output = GetNumberOfChannels(outputLayout);
if (channels_count_output == null)
{
throw new ArgumentException("outputLayout");
}
var channels_count_input = GetNumberOfChannels(inputLayout);
if (channels_count_input == null)
{
throw new ArgumentException("inputLayout");
}
int ptr_size;
var input_ptr = inputLayout.ToBlock(out ptr_size);
var output_ptr = outputLayout.ToBlock(out ptr_size);
var array = new IntPtr[] { input_ptr, output_ptr };
ptr_size = sizeof(IntPtr) * array.Length;
float[,] value;
AudioFormatError res;
fixed(IntPtr *ptr = &array[0])
{
value = new float[channels_count_input.Value, channels_count_output.Value];
var size = sizeof(float) * channels_count_input.Value * channels_count_output.Value;
fixed(float *value_ptr = &value[0, 0])
{
res = AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.MatrixMixMap, ptr_size, ptr, ref size, value_ptr);
}
}
Marshal.FreeHGlobal(input_ptr);
Marshal.FreeHGlobal(output_ptr);
return(res == 0 ? value : null);
}
public static AudioChannelLayoutTag? GetTagForChannelLayout(AudioChannelLayout layout)
{
if (layout == null)
throw new ArgumentNullException ("layout");
int ptr_size;
var ptr = layout.ToBlock (out ptr_size);
int size = sizeof (AudioChannelLayoutTag);
int value;
var res = AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.TagForChannelLayout, ptr_size, ptr, ref size, out value);
Marshal.FreeHGlobal (ptr);
return res != 0 ? null : (AudioChannelLayoutTag?) value;
}
public static int?GetNumberOfChannels(AudioChannelLayout layout)
{
if (layout == null)
{
throw new ArgumentNullException("layout");
}
int ptr_size;
var ptr = layout.ToBlock(out ptr_size);
int size = sizeof(int);
int value;
var res = AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.NumberOfChannelsForLayout, ptr_size, ptr, ref size, out value);
Marshal.FreeHGlobal(ptr);
return(res != 0 ? null : (int?)value);
}
