diff --git a/src/Audio/StreamingSoundQoa.cs b/src/Audio/StreamingSoundQoa.cs index 5be9904..6c4340d 100644 --- a/src/Audio/StreamingSoundQoa.cs +++ b/src/Audio/StreamingSoundQoa.cs @@ -16,17 +16,42 @@ namespace MoonWorks.Audio public override bool Loaded => QoaHandle != IntPtr.Zero; private string FilePath; + private const uint QOA_MAGIC = 0x716f6166; /* 'qoaf' */ + + private static unsafe UInt64 ReverseEndianness(UInt64 value) + { + byte* bytes = (byte*) &value; + + return + ((UInt64)(bytes[0]) << 56) | ((UInt64)(bytes[1]) << 48) | + ((UInt64)(bytes[2]) << 40) | ((UInt64)(bytes[3]) << 32) | + ((UInt64)(bytes[4]) << 24) | ((UInt64)(bytes[5]) << 16) | + ((UInt64)(bytes[6]) << 8) | ((UInt64)(bytes[7]) << 0); + } + public unsafe static StreamingSoundQoa Create(AudioDevice device, string filePath) { - var handle = FAudio.qoa_open_from_filename(filePath); - if (handle == IntPtr.Zero) + using var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read); + using var reader = new BinaryReader(stream); + + UInt64 fileHeader = ReverseEndianness(reader.ReadUInt64()); + if ((fileHeader >> 32) != QOA_MAGIC) { - throw new AudioLoadException("Error opening QOA file!"); + throw new AudioLoadException("Specified file is not a QOA file."); } - FAudio.qoa_attributes(handle, out var channels, out var samplerate, out var samplesPerChannelPerFrame, out var totalSamplesPerChannel); + uint totalSamplesPerChannel = (uint) (fileHeader & (0xFFFFFFFF)); + if (totalSamplesPerChannel == 0) + { + throw new AudioLoadException("Specified file is not a valid QOA file."); + } - var streamingSound = new StreamingSoundQoa( + UInt64 frameHeader = ReverseEndianness(reader.ReadUInt64()); + uint channels = (uint) ((frameHeader >> 56) & 0x0000FF); + uint samplerate = (uint) ((frameHeader >> 32) & 0xFFFFFF); + uint samplesPerChannelPerFrame = (uint) ((frameHeader >> 16) & 0x00FFFF); + + return new StreamingSoundQoa( device, filePath, channels, @@ -34,10 +59,6 @@ namespace MoonWorks.Audio samplesPerChannelPerFrame, totalSamplesPerChannel ); - - FAudio.qoa_close(handle); - - return streamingSound; } internal unsafe StreamingSoundQoa(