83 lines
2.0 KiB
C#
83 lines
2.0 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace MoonWorks.Audio
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{
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public class StaticSound : AudioResource
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{
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internal FAudio.FAudioBuffer Handle;
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public ushort Channels { get; }
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public uint SamplesPerSecond { get; }
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public uint LoopStart { get; set; } = 0;
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public uint LoopLength { get; set; } = 0;
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public static StaticSound LoadOgg(AudioDevice device, string filePath)
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{
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var filePointer = FAudio.stb_vorbis_open_filename(filePath, out var error, IntPtr.Zero);
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if (error != 0)
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{
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throw new AudioLoadException("Error loading file!");
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}
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var info = FAudio.stb_vorbis_get_info(filePointer);
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var bufferSize = FAudio.stb_vorbis_stream_length_in_samples(filePointer) * info.channels;
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var buffer = new float[bufferSize];
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FAudio.stb_vorbis_get_samples_float_interleaved(
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filePointer,
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info.channels,
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buffer,
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(int) bufferSize
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);
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FAudio.stb_vorbis_close(filePointer);
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return new StaticSound(
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device,
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(ushort) info.channels,
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info.sample_rate,
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buffer,
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0,
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(uint) buffer.Length
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);
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}
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public StaticSound(
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AudioDevice device,
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ushort channels,
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uint samplesPerSecond,
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float[] buffer,
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uint bufferOffset, /* in floats */
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uint bufferLength /* in floats */
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) : base(device)
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{
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Channels = channels;
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SamplesPerSecond = samplesPerSecond;
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var bufferLengthInBytes = (int) (bufferLength * sizeof(float));
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Handle = new FAudio.FAudioBuffer();
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Handle.Flags = FAudio.FAUDIO_END_OF_STREAM;
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Handle.pContext = IntPtr.Zero;
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Handle.AudioBytes = (uint) bufferLengthInBytes;
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Handle.pAudioData = Marshal.AllocHGlobal(bufferLengthInBytes);
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Marshal.Copy(buffer, (int) bufferOffset, Handle.pAudioData, (int) bufferLength);
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Handle.PlayBegin = 0;
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Handle.PlayLength = 0;
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LoopStart = 0;
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LoopLength = 0;
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}
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public StaticSoundInstance CreateInstance(bool loop = false)
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{
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return new StaticSoundInstance(Device, this, false, loop);
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}
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protected override void Destroy()
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{
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Marshal.FreeHGlobal(Handle.pAudioData);
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}
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}
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}
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