public static AudioChannelBit? ToAudioChannel(this AudioChannelLayoutTag layoutTag)
{
int value;
int size = sizeof (uint);
int layout = (int) layoutTag;
if (AudioFormatPropertyNative.AudioFormatGetProperty (AudioFormatProperty.BitmapForLayoutTag, sizeof (AudioChannelLayoutTag), ref layout, ref size, out value) != 0)
return null;
return (AudioChannelBit) value;
}
public int Reserved; // uint
#if !COREBUILD
#if !WATCH
public static unsafe 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 unsafe 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 = Marshal.SizeOf(format);
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 AudioChannelLayout FromAudioChannelLayoutTag(AudioChannelLayoutTag channelLayoutTag)
{
return(GetChannelLayout(AudioFormatProperty.ChannelLayoutForTag, (int)channelLayoutTag));
}
public static bool IsReserved(this AudioChannelLayoutTag value)
{
return((uint)value >= 0xF0000000 && (uint)value <= 0xFFFFFFFE);
}
public static uint GetNumberOfChannels(this AudioChannelLayoutTag inLayoutTag)
{
return((uint)inLayoutTag & 0x0000FFFF);
}
public static AudioChannelLayout FromAudioChannelLayoutTag(AudioChannelLayoutTag channelLayoutTag)
{
return GetChannelLayout (AudioFormatProperty.ChannelLayoutForTag, (int) channelLayoutTag);
}
public static unsafe 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 unsafe 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;
}
}
internal unsafe AudioChannelLayout(IntPtr h)
{
AudioTag = (AudioChannelLayoutTag) Marshal.ReadInt32 (h, 0);
ChannelUsage = (AudioChannelBit) Marshal.ReadInt32 (h, 4);
Channels = new AudioChannelDescription [Marshal.ReadInt32 (h, 8)];
int p = 12;
for (int i = 0; i < Channels.Length; i++){
Channels [i] = (AudioChannelDescription) Marshal.PtrToStructure((IntPtr) (unchecked (((byte *) h) + p)), typeof(AudioChannelDescription));
p += Marshal.SizeOf (typeof (AudioChannelDescription));
}
}
