void ISpEngineSite.LoadResource(string uri, ref string mediaType, out IStream stream)
{
mediaType = null;
try
{
Stream stream2 = _site.LoadResource(new Uri(uri, UriKind.RelativeOrAbsolute), mediaType);
BinaryReader br = new BinaryReader(stream2);
byte[] waveFormat = AudioBase.GetWaveFormat(br);
mediaType = null;
if (waveFormat != null)
{
WAVEFORMATEX wAVEFORMATEX = WAVEFORMATEX.ToWaveHeader(waveFormat);
WaveFormatId wFormatTag = (WaveFormatId)wAVEFORMATEX.wFormatTag;
if (wFormatTag == WaveFormatId.Pcm || (uint)(wFormatTag - 6) <= 1u)
{
mediaType = "audio/x-wav";
}
}
stream2.Position = 0L;
stream = new SpStreamWrapper(stream2);
}
catch
{
stream = null;
}
}
/// <summary>
/// Load a file either from a local network or from the Internet.
/// </summary>
void ISpEngineSite.LoadResource(string uri, ref string mediaType, out IStream stream)
{
mediaType = null;
#pragma warning disable 56518 // BinaryReader can't be disposed because underlying stream still in use.
try
{
// Get the mime type
Stream localStream = _site.LoadResource(new Uri(uri, UriKind.RelativeOrAbsolute), mediaType);
BinaryReader reader = new(localStream);
byte[] waveFormat = System.Speech.Internal.Synthesis.AudioBase.GetWaveFormat(reader);
mediaType = null;
if (waveFormat != null)
{
WAVEFORMATEX hdr = WAVEFORMATEX.ToWaveHeader(waveFormat);
switch ((WaveFormatId)hdr.wFormatTag)
{
case WaveFormatId.Alaw:
case WaveFormatId.Mulaw:
case WaveFormatId.Pcm:
mediaType = "audio/x-wav";
break;
}
}
localStream.Position = 0;
stream = new SpStreamWrapper(localStream);
}
catch
{
stream = null;
}
#pragma warning restore 56518
}
internal override void Begin(byte[] wfx)
{
if (_deviceOpen)
{
throw new InvalidOperationException();
}
_wfxIn = WAVEFORMATEX.ToWaveHeader(wfx);
_doConversion = _pcmConverter.PrepareConverter(ref _wfxIn, ref _wfxOut);
if (_totalByteWrittens == 0 && _hasHeader)
{
AudioBase.WriteWaveHeader(_stream, _wfxOut, _startStreamPosition, 0);
}
_bytesWritten = 0;
_aborted = false;
_deviceOpen = true;
}
/// <summary>
/// Begin to play
/// </summary>
internal override void Begin(byte[] wfx)
{
if (_deviceOpen)
{
System.Diagnostics.Debug.Assert(false);
throw new InvalidOperationException();
}
// Get the audio format if conversion is needed
_wfxIn = WAVEFORMATEX.ToWaveHeader(wfx);
_doConversion = _pcmConverter.PrepareConverter(ref _wfxIn, ref _wfxOut);
if (_totalByteWrittens == 0 && _hasHeader)
{
WriteWaveHeader(_stream, _wfxOut, _startStreamPosition, 0);
}
_bytesWritten = 0;
// set the flags
_aborted = false;
_deviceOpen = true;
}