forked from MoonsideGames/MoonWorks
90 lines
2.5 KiB
C#
90 lines
2.5 KiB
C#
using System;
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using System.IO;
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namespace MoonWorks.Audio
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{
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public class StreamingSoundOgg : StreamingSound
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{
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// FIXME: what should this value be?
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public const int BUFFER_SIZE = 1024 * 128;
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internal IntPtr FileHandle { get; }
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internal FAudio.stb_vorbis_info Info { get; }
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private readonly float[] buffer;
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public override SoundState State { get; protected set; }
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public static StreamingSoundOgg Load(
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AudioDevice device,
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string filePath,
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bool is3D = false,
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bool loop = false
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) {
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var fileHandle = 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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Logger.LogError("Error opening OGG file!");
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throw new AudioLoadException("Error opening OGG file!");
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}
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var info = FAudio.stb_vorbis_get_info(fileHandle);
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return new StreamingSoundOgg(
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device,
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fileHandle,
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info,
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is3D,
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loop
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);
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}
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internal StreamingSoundOgg(
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AudioDevice device,
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IntPtr fileHandle,
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FAudio.stb_vorbis_info info,
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bool is3D,
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bool loop
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) : base(device, (ushort) info.channels, info.sample_rate, is3D, loop)
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{
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FileHandle = fileHandle;
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Info = info;
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buffer = new float[BUFFER_SIZE];
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device.AddDynamicSoundInstance(this);
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}
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protected override void AddBuffer(
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out float[] buffer,
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out uint bufferOffset,
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out uint bufferLength,
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out bool reachedEnd
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) {
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buffer = this.buffer;
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/* NOTE: this function returns samples per channel, not total samples */
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var samples = FAudio.stb_vorbis_get_samples_float_interleaved(
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FileHandle,
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Info.channels,
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buffer,
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buffer.Length
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);
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var sampleCount = samples * Info.channels;
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bufferOffset = 0;
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bufferLength = (uint) sampleCount;
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reachedEnd = sampleCount < buffer.Length;
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}
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protected override void SeekStart()
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{
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FAudio.stb_vorbis_seek_start(FileHandle);
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}
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protected override void Destroy()
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{
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FAudio.stb_vorbis_close(FileHandle);
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}
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}
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}
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