Joonas Rikkonen
49 lines
3.1 KiB
C#
49 lines
3.1 KiB
C#
// MonoGame - Copyright (C) The MonoGame Team
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// This file is subject to the terms and conditions defined in
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// file 'LICENSE.txt', which is part of this source code package.
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using System;
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using System.IO;
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using Microsoft.Xna.Framework.Content.Pipeline.Audio;
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namespace Microsoft.Xna.Framework.Content.Pipeline
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{
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/// <summary>
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/// Provides methods for reading .wav audio files for use in the Content Pipeline.
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/// </summary>
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[ContentImporter(".wav", DisplayName = "Wav Importer - MonoGame", DefaultProcessor = "SoundEffectProcessor")]
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public class WavImporter : ContentImporter<AudioContent>
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{
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/// <summary>
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/// Called by the XNA Framework when importing a .wav audio file to be used as a game asset. This is the method called by the XNA Framework when an asset is to be imported into an object that can be recognized by the Content Pipeline.
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/// </summary>
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/// <param name="filename">Name of a game asset file.</param>
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/// <param name="context">Contains information for importing a game asset, such as a logger interface.</param>
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/// <returns>Resulting game asset.</returns>
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/// <remarks>This importer supports PCM in unsigned 8-bit, signed 16-bit, signed 24-bit, IEEE Float 32-bit, MS-ADPCM or IMA/ADPCM with sample rates from 8KHz up to 48KHz.</remarks>
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public override AudioContent Import(string filename, ContentImporterContext context)
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{
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if (string.IsNullOrEmpty(filename))
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throw new ArgumentNullException("filename");
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if (context == null)
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throw new ArgumentNullException("context");
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if (!File.Exists(filename))
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throw new FileNotFoundException(string.Format("Could not locate audio file {0}.", Path.GetFileName(filename)));
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var content = new AudioContent(filename, AudioFileType.Wav);
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// Validate the format of the input.
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if (content.Format.SampleRate < 8000 || content.Format.SampleRate > 48000)
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throw new InvalidContentException(string.Format("Audio file {0} contains audio data with unsupported sample rate of {1}KHz. Supported sample rates are from 8KHz up to 48KHz.", Path.GetFileName(filename), content.Format.SampleRate));
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var validPcm = content.Format.Format == 1 && (content.Format.BitsPerSample == 8 || content.Format.BitsPerSample == 16 || content.Format.BitsPerSample == 24);
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var validAdpcm = (content.Format.Format == 2 || content.Format.Format == 17) && content.Format.BitsPerSample == 4;
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var validIeeeFloat = content.Format.Format == 3 && content.Format.BitsPerSample == 32;
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if (!(validPcm || validAdpcm || validIeeeFloat))
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throw new InvalidContentException(string.Format("Audio file {0} contains audio data with unsupported format of {1} and bit depth of {2}. Supported bit depths are unsigned 8-bit, signed 16-bit, signed 24-bit for PCM(1) and 32-bit for IEEE Float(3).", Path.GetFileName(filename), content.Format.Format, content.Format.BitsPerSample));
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return content;
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}
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}
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}
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