forked from MoonsideGames/MoonWorks
91 lines
2.3 KiB
C#
91 lines
2.3 KiB
C#
using System;
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using System.IO;
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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 StreamingSoundOgg : StreamingSoundSeekable
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{
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private IntPtr VorbisHandle;
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private IntPtr FileDataPtr;
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private FAudio.stb_vorbis_info Info;
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protected override int BUFFER_SIZE => 32768;
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public unsafe static StreamingSoundOgg Load(AudioDevice device, string filePath)
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{
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var fileData = File.ReadAllBytes(filePath);
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var fileDataPtr = NativeMemory.Alloc((nuint) fileData.Length);
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Marshal.Copy(fileData, 0, (IntPtr) fileDataPtr, fileData.Length);
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var vorbisHandle = FAudio.stb_vorbis_open_memory((IntPtr) fileDataPtr, fileData.Length, out int error, IntPtr.Zero);
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if (error != 0)
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{
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NativeMemory.Free(fileDataPtr);
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Logger.LogError("Error opening OGG file!");
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Logger.LogError("Error: " + error);
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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(vorbisHandle);
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return new StreamingSoundOgg(
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device,
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(IntPtr) fileDataPtr,
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vorbisHandle,
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info
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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 fileDataPtr, // MUST BE A NATIVE MEMORY HANDLE!!
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IntPtr vorbisHandle,
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FAudio.stb_vorbis_info info
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) : base(
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device,
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3, /* float type */
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32, /* size of float */
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(ushort) (4 * info.channels),
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(ushort) info.channels,
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info.sample_rate
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)
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{
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FileDataPtr = fileDataPtr;
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VorbisHandle = vorbisHandle;
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Info = info;
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}
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public override void Seek(uint sampleFrame)
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{
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FAudio.stb_vorbis_seek(VorbisHandle, sampleFrame);
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}
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protected unsafe override void FillBuffer(
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void* buffer,
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int bufferLengthInBytes,
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out int filledLengthInBytes,
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out bool reachedEnd
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)
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{
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var lengthInFloats = bufferLengthInBytes / sizeof(float);
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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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VorbisHandle,
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Info.channels,
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(IntPtr) buffer,
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lengthInFloats
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);
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var sampleCount = samples * Info.channels;
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reachedEnd = sampleCount < lengthInFloats;
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filledLengthInBytes = sampleCount * sizeof(float);
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}
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protected unsafe override void Destroy()
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{
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FAudio.stb_vorbis_close(VorbisHandle);
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NativeMemory.Free((void*) FileDataPtr);
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}
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}
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}
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