/// <summary>
/// Creates and configures a source voice. For more information see
/// http://msdn.microsoft.com/en-us/library/windows/desktop/microsoft.directx_sdk.ixaudio2.ixaudio2.createsourcevoice(v=vs.85).aspx.
/// </summary>
/// <param name="pSourceVoice">If successful, returns a pointer to the new <see cref="XAudio2SourceVoice" /> object.</param>
/// <param name="sourceFormat">
/// Pointer to a <see cref="WaveFormat" />. The following formats are supported:
/// <ul>
/// <li>8-bit (unsigned) integer PCM</li><li>16-bit integer PCM (optimal format for XAudio2)</li>
/// <li>20-bit integer PCM (either in 24 or 32 bit containers)</li>
/// <li>24-bit integer PCM (either in 24 or 32 bit containers)</li><li>32-bit integer PCM</li>
/// <li>32-bit float PCM (preferred format after 16-bit integer)</li>
/// </ul>
/// The number of channels in a source voice must be less than or equal to <see cref="MaxAudioChannels" />. The sample
/// rate of a source voice must be between <see cref="MinimumSampleRate" /> and <see cref="MaximumSampleRate" />.
/// </param>
/// <param name="flags">
/// <see cref="VoiceFlags" /> that specify the behavior of the source voice. A flag can be
/// <see cref="VoiceFlags.None" /> or a combination of one or more of the following.
/// Possible values are <see cref="VoiceFlags.NoPitch" />, <see cref="VoiceFlags.NoSampleRateConversition" /> and
/// <see cref="VoiceFlags.UseFilter" />. <see cref="VoiceFlags.Music" /> is not supported on Windows.
/// </param>
/// <param name="maxFrequencyRatio">
/// Highest allowable frequency ratio that can be set on this voice. The value for this
/// argument must be between <see cref="MinFrequencyRatio" /> and <see cref="MaxFrequencyRatio" />.
/// </param>
/// <param name="voiceCallback">
/// Client-provided callback interface, <see cref="IXAudio2VoiceCallback" />. This parameter is
/// optional and can be null.
/// </param>
/// <param name="sendList">
/// List of <see cref="VoiceSends" /> structures that describe the set of destination voices for the
/// source voice. If <paramref name="sendList" /> is NULL, the send list defaults to a single output to the first mastering
/// voice created.
/// </param>
/// <param name="effectChain">
/// List of <see cref="EffectChain" /> structures that describe an effect chain to use in the
/// source voice. This parameter is optional and can be null.
/// </param>
/// <returns>HRESULT</returns>
public override unsafe int CreateSourceVoiceNative(
out IntPtr pSourceVoice,
IntPtr sourceFormat,
VoiceFlags flags,
float maxFrequencyRatio,
IXAudio2VoiceCallback voiceCallback,
VoiceSends?sendList, //out
EffectChain?effectChain
)
{
VoiceSends value0 = sendList.HasValue ? sendList.Value : new VoiceSends();
EffectChain value1 = effectChain.HasValue ? effectChain.Value : new EffectChain();
IntPtr p = IntPtr.Zero;
if (voiceCallback != null)
{
p = Marshal.GetComInterfaceForObject(voiceCallback, typeof(IXAudio2VoiceCallback));
p = Utils.CSCoreUtils.GetComInterfaceForObjectWithAdjustedVtable(p, 7, 3);
}
try
{
fixed(void *ptr = &pSourceVoice)
{
return(LocalInterop.Calli(UnsafeBasePtr,
ptr,
sourceFormat,
flags,
maxFrequencyRatio,
p.ToPointer(),
sendList.HasValue ? &value0 : (void *)IntPtr.Zero,
effectChain.HasValue ? &value1 : (void *)IntPtr.Zero,
((void **)(*(void **)UnsafeBasePtr))[5]));
}
}
finally
{
if (p != IntPtr.Zero)
{
//while patching the IUnknown-members out of the vtable, we've made a backup of the release pointer,
//which gets called here -> the Marshal.Release method would call any function on index 2 of the vtable
//we've patched there
Utils.CSCoreUtils.Release(p);
//Marshal.Release(p);
}
}
}
/// <summary>
/// Designates a new set of submix or mastering voices to receive the output of the voice.
/// </summary>
/// <param name="voiceSendDescriptors">
/// Array of <see cref="VoiceSendDescriptor" />s. if <paramref name="voiceSendDescriptors" /> is null, the voice will send
/// its output to the current mastering voice.
/// All voices in the <paramref name="voiceSendDescriptors" /> must have the same input sample rate.
/// </param>
public unsafe void SetOutputVoices(VoiceSendDescriptor[] voiceSendDescriptors)
{
if (voiceSendDescriptors == null)
{
XAudio2Exception.Try(SetOutputVoicesNative(null), InterfaceName, "SetOutputVoices");
}
else
{
fixed(void *ptr = &voiceSendDescriptors[0])
{
var p = new VoiceSends
{
SendCount = voiceSendDescriptors.Length,
SendsPtr = new IntPtr(ptr)
};
XAudio2Exception.Try(SetOutputVoicesNative(p), InterfaceName, "SetOutputVoices");
}
}
}
/// <summary>
/// Creates and configures a submix voice.
/// </summary>
/// <param name="pSubmixVoice">On success, returns a pointer to the new <see cref="XAudio2SubmixVoice" /> object.</param>
/// <param name="inputChannels">
/// Number of channels in the input audio data of the submix voice. The
/// <paramref name="inputChannels" /> must be less than or equal to <see cref="MaxAudioChannels" />.
/// </param>
/// <param name="inputSampleRate">
/// Sample rate of the input audio data of submix voice. This rate must be a multiple of
/// <see cref="QuantumDenominator" />. InputSampleRate must be between <see cref="MinimumSampleRate" /> and
/// <see cref="MaximumSampleRate" />.
/// </param>
/// <param name="flags">
/// Flags that specify the behavior of the submix voice. It can be <see cref="VoiceFlags.None" /> or
/// <see cref="VoiceFlags.UseFilter" />.
/// </param>
/// <param name="processingStage">
/// An arbitrary number that specifies when this voice is processed with respect to other
/// submix voices, if the XAudio2 engine is running other submix voices. The voice is processed after all other voices
/// that include a smaller <paramref name="processingStage" /> value and before all other voices that include a larger
/// <paramref name="processingStage" /> value. Voices that include the same <paramref name="processingStage" /> value are
/// processed in any order. A submix voice cannot send to another submix voice with a lower or equal
/// <paramref name="processingStage" /> value. This prevents audio being lost due to a submix cycle.
/// </param>
/// <param name="sendList">
/// List of <see cref="VoiceSends" /> structures that describe the set of destination voices for the
/// submix voice. If <paramref name="sendList" /> is NULL, the send list will default to a single output to the first
/// mastering voice created.
/// </param>
/// <param name="effectChain">
/// List of <see cref="EffectChain" /> structures that describe an effect chain to use in the
/// submix voice. This parameter is optional and can be null.
/// </param>
/// <returns>HRESULT</returns>
public override unsafe int CreateSubmixVoiceNative(out IntPtr pSubmixVoice, int inputChannels,
int inputSampleRate, VoiceFlags flags,
int processingStage, VoiceSends?sendList, EffectChain?effectChain)
{
VoiceSends value0 = sendList.HasValue ? sendList.Value : new VoiceSends();
EffectChain value1 = effectChain.HasValue ? effectChain.Value : new EffectChain();
fixed(void *ptr = &pSubmixVoice)
{
return(LocalInterop.Calli(UnsafeBasePtr,
ptr,
inputChannels,
inputSampleRate,
flags,
processingStage,
sendList.HasValue ? &value0 : (void *)IntPtr.Zero,
effectChain.HasValue ? &value1 : (void *)IntPtr.Zero,
((void **)(*(void **)UnsafeBasePtr))[6]));
}
}
