45 lines
1.5 KiB
C#
45 lines
1.5 KiB
C#
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using NAudio.Wave;
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namespace StreamShorts.Library.Media;
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/// <summary>
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/// Represents a service for processing audio files using NAudio.
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/// </summary>
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/// <inheritdoc/>
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internal class NAudioService : IAudioService
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{
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public Stream ConvertMp3ToWav16(Stream mp3)
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{
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using var reader = new Mp3FileReader(mp3);
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var outFormat = new WaveFormat(16000, reader.WaveFormat.Channels);
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using var resampler = new MediaFoundationResampler(reader, outFormat);
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var waveStream = new MemoryStream();
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WaveFileWriter.WriteWavFileToStream(waveStream, resampler);
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waveStream.Position = 0;
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return waveStream;
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}
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public int GetNumberOfWavSegments(Stream wavStream, TimeSpan segmentDuration)
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{
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using var waveReader = new WaveFileReader(wavStream);
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var totalDuration = waveReader.TotalTime;
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var segmentCount = (int)Math.Ceiling(totalDuration.TotalMilliseconds / segmentDuration.TotalMilliseconds);
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wavStream.Position = 0;
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return segmentCount;
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}
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public Stream GetWavSegment(Stream wavStream, int segmentNumber, TimeSpan segmentDuration)
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{
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using var segmentWaveReader = new WaveFileReader(wavStream);
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var segment = segmentWaveReader.ToSampleProvider()
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.Skip(segmentNumber * segmentDuration)
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.Take(segmentDuration);
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var segmentProvider = segment.ToWaveProvider16();
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var segmentStream = new MemoryStream();
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WaveFileWriter.WriteWavFileToStream(segmentStream, segmentProvider);
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segmentStream.Position = 0;
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wavStream.Position = 0;
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return segmentStream;
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}
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}
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