unsafe static T[] GetAvailable <T> (AudioFormatProperty prop, AudioFormatType format) where T : struct
{
uint size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo(prop, sizeof(AudioFormatType), ref format, out size) != 0)
{
return(null);
}
var data = new T[size / Marshal.SizeOf(typeof(T))];
fixed(T *ptr = data)
{
var res = AudioFormatPropertyNative.AudioFormatGetProperty(prop, sizeof(AudioFormatType), ref format, ref size, (IntPtr)ptr);
if (res != 0)
{
return(null);
}
Array.Resize(ref data, (int)size / Marshal.SizeOf(typeof(T)));
return(data);
}
}
public unsafe static AudioChannelLayoutTag[] GetTagsForNumberOfChannels(int count)
{
const int type_size = sizeof(uint);
int size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo(AudioFormatProperty.TagsForNumberOfChannels, type_size, ref count, out size) != 0)
{
return(null);
}
var data = new AudioChannelLayoutTag[size / type_size];
fixed(AudioChannelLayoutTag *ptr = data)
{
var res = AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.TagsForNumberOfChannels, type_size, ref count, ref size, (int *)ptr);
if (res != 0)
{
return(null);
}
return(data);
}
}
public unsafe static AudioChannelLayoutTag[] GetAvailableEncodeChannelLayoutTags(AudioStreamBasicDescription format)
{
var type_size = sizeof(AudioStreamBasicDescription);
uint size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo(AudioFormatProperty.AvailableEncodeChannelLayoutTags, type_size, ref format, out size) != 0)
{
return(null);
}
var data = new AudioChannelLayoutTag[size / sizeof(AudioChannelLayoutTag)];
fixed(AudioChannelLayoutTag *ptr = data)
{
var res = AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.AvailableEncodeChannelLayoutTags, type_size, ref format, ref size, (int *)ptr);
if (res != 0)
{
return(null);
}
return(data);
}
}
public static AudioFormatError GetFormatInfo(ref AudioStreamBasicDescription format)
{
var size = Marshal.SizeOf(format);
return(AudioFormatPropertyNative.AudioFormatGetProperty(AudioFormatProperty.FormatInfo, 0, IntPtr.Zero, ref size, ref format));
}