public unsafe static AudioFormat? GetFirstPlayableFormat (AudioFormat[] formatList)
{
if (formatList == null)
throw new ArgumentNullException ("formatList");
if (formatList.Length < 2)
throw new ArgumentException ("formatList");
fixed (AudioFormat* item = &formatList[0]) {
uint index;
int size = sizeof (uint);
var ptr_size = sizeof (AudioFormat) * formatList.Length;
if (AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.FirstPlayableFormatFromList, ptr_size, item, ref size, out index) != 0)
return null;
return formatList [index];
}
}
public static unsafe extern AudioFormatError AudioFormatGetProperty(AudioFormatProperty inPropertyID, int inSpecifierSize, AudioFormat* inSpecifier, ref int ioPropertyDataSize, out uint outPropertyData);
public static unsafe extern AudioFormatError AudioFormatGetProperty(AudioFormatProperty propertyID, int inSpecifierSize, ref AudioFormatInfo inSpecifier, ref uint ioDataSize, AudioFormat* outPropertyData);
public unsafe AudioFormat[] GetFormatList (byte[] magicCookie)
{
if (magicCookie == null)
throw new ArgumentNullException ("magicCookie");
var afi = new AudioFormatInfo ();
afi.AudioStreamBasicDescription = this;
fixed (byte* b = magicCookie)
{
afi.MagicCookieWeak = b;
afi.MagicCookieSize = magicCookie.Length;
var type_size = sizeof (AudioFormat);
uint size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo (AudioFormatProperty.FormatList, type_size, ref afi, out size) != 0)
return null;
Debug.Assert (sizeof (AudioFormat) == type_size);
var data = new AudioFormat[size / type_size];
fixed (AudioFormat* ptr = &data[0]) {
var res = AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.FormatList, type_size, ref afi, ref size, ptr);
if (res != 0)
return null;
Array.Resize (ref data, (int)size / type_size);
return data;
}
}
}
public unsafe AudioFormat[] GetOutputFormatList (byte[] magicCookie = null)
{
var afi = new AudioFormatInfo ();
afi.AudioStreamBasicDescription = this;
var type_size = sizeof (AudioFormat);
uint size;
if (AudioFormatPropertyNative.AudioFormatGetPropertyInfo (AudioFormatProperty.OutputFormatList, type_size, ref afi, out size) != 0)
return null;
Debug.Assert (sizeof (AudioFormat) == type_size);
var data = new AudioFormat[size / type_size];
fixed (AudioFormat* ptr = &data[0]) {
var res = AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.OutputFormatList, type_size, ref afi, ref size, ptr);
if (res != 0)
return null;
Array.Resize (ref data, (int) size / type_size);
return data;
}
}
