|
|
#region License
|
|
|
/* FNA - XNA4 Reimplementation for Desktop Platforms
|
|
|
* Copyright 2009-2020 Ethan Lee and the MonoGame Team
|
|
|
*
|
|
|
* Released under the Microsoft Public License.
|
|
|
* See LICENSE for details.
|
|
|
*/
|
|
|
#endregion
|
|
|
|
|
|
#region Using Statements
|
|
|
using System.IO;
|
|
|
|
|
|
using Microsoft.Xna.Framework.Audio;
|
|
|
#endregion
|
|
|
|
|
|
namespace Microsoft.Xna.Framework.Content
|
|
|
{
|
|
|
internal class SoundEffectReader : ContentTypeReader<SoundEffect>
|
|
|
{
|
|
|
#region Private Supported File Extensions Variable
|
|
|
|
|
|
static string[] supportedExtensions = new string[] { ".wav" };
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
#region Internal Filename Normalizer Method
|
|
|
|
|
|
internal static string Normalize(string fileName)
|
|
|
{
|
|
|
return Normalize(fileName, supportedExtensions);
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
#region Protected Read Method
|
|
|
|
|
|
protected internal override SoundEffect Read(
|
|
|
ContentReader input,
|
|
|
SoundEffect existingInstance
|
|
|
) {
|
|
|
/* Swap endian - this is one of the very few places requiring this!
|
|
|
* Note: This only affects the fmt chunk that's glued into the file.
|
|
|
*/
|
|
|
bool se = input.platform == 'x';
|
|
|
|
|
|
// Format block length
|
|
|
uint formatLength = input.ReadUInt32();
|
|
|
|
|
|
// WaveFormatEx data
|
|
|
ushort wFormatTag = Swap(se, input.ReadUInt16());
|
|
|
ushort nChannels = Swap(se, input.ReadUInt16());
|
|
|
uint nSamplesPerSec = Swap(se, input.ReadUInt32());
|
|
|
uint nAvgBytesPerSec = Swap(se, input.ReadUInt32());
|
|
|
ushort nBlockAlign = Swap(se, input.ReadUInt16());
|
|
|
ushort wBitsPerSample = Swap(se, input.ReadUInt16());
|
|
|
/* ushort cbSize =*/ input.ReadUInt16();
|
|
|
|
|
|
// Seek past the rest of this crap (cannot seek though!)
|
|
|
input.ReadBytes((int) (formatLength - 18));
|
|
|
|
|
|
// Wavedata
|
|
|
byte[] data = input.ReadBytes(input.ReadInt32());
|
|
|
|
|
|
// Loop information
|
|
|
int loopStart = input.ReadInt32();
|
|
|
int loopLength = input.ReadInt32();
|
|
|
|
|
|
// Sound duration in milliseconds, unused
|
|
|
input.ReadUInt32();
|
|
|
|
|
|
return new SoundEffect(
|
|
|
input.AssetName,
|
|
|
data,
|
|
|
0,
|
|
|
data.Length,
|
|
|
wFormatTag,
|
|
|
nChannels,
|
|
|
nSamplesPerSec,
|
|
|
nAvgBytesPerSec,
|
|
|
nBlockAlign,
|
|
|
wBitsPerSample,
|
|
|
loopStart,
|
|
|
loopLength
|
|
|
);
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
#region Internal Static Swapping Methods
|
|
|
|
|
|
internal static ushort Swap(bool swap, ushort x)
|
|
|
{
|
|
|
return !swap ? x : (ushort) (
|
|
|
((x >> 8) & 0x00FF) |
|
|
|
((x << 8) & 0xFF00)
|
|
|
);
|
|
|
}
|
|
|
|
|
|
internal static uint Swap(bool swap, uint x)
|
|
|
{
|
|
|
return !swap ? x : (
|
|
|
((x >> 24) & 0x000000FF) |
|
|
|
((x >> 8) & 0x0000FF00) |
|
|
|
((x << 8) & 0x00FF0000) |
|
|
|
((x << 24) & 0xFF000000)
|
|
|
);
|
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
|
|
}
|
|
|
}
|
|
|
|
