86 lines
1.9 KiB
C#
86 lines
1.9 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2017 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System;
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using System.IO;
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using OpenRA.Mods.Common.FileFormats;
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namespace OpenRA.Mods.Common.AudioLoaders
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{
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public class WavLoader : ISoundLoader
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{
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bool IsWave(Stream s)
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{
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var start = s.Position;
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var type = s.ReadASCII(4);
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s.Position += 4;
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var format = s.ReadASCII(4);
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s.Position = start;
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return type == "RIFF" && format == "WAVE";
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}
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bool ISoundLoader.TryParseSound(Stream stream, out ISoundFormat sound)
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{
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try
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{
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if (IsWave(stream))
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{
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sound = new WavFormat(stream);
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return true;
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}
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}
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catch
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{
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// Not a (supported) WAV
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}
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sound = null;
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return false;
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}
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}
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public sealed class WavFormat : ISoundFormat
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{
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public int Channels { get { return reader.Value.Channels; } }
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public int SampleBits { get { return reader.Value.BitsPerSample; } }
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public int SampleRate { get { return reader.Value.SampleRate; } }
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public float LengthInSeconds { get { return WavReader.WaveLength(stream); } }
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public Stream GetPCMInputStream() { return new MemoryStream(reader.Value.RawOutput); }
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public void Dispose() { stream.Dispose(); }
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Lazy<WavReader> reader;
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readonly Stream stream;
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public WavFormat(Stream stream)
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{
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this.stream = stream;
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var position = stream.Position;
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reader = Exts.Lazy(() =>
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{
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var wavReader = new WavReader();
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try
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{
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if (!wavReader.LoadSound(stream))
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throw new InvalidDataException();
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}
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finally
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{
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stream.Position = position;
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}
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return wavReader;
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});
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}
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}
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} |