C# XAudio2.CreateSubmixVoice方法代碼示例

 /// <summary>	
 /// Creates and configures a submix voice.	
 /// </summary>	
 /// <param name="device">an instance of <see cref = "SharpDX.XAudio2.XAudio2" /></param>
 /// <param name="inputChannels">[in]  Number of channels in the input audio data of the submix voice. InputChannels must be less than or equal to XAUDIO2_MAX_AUDIO_CHANNELS. </param>
 /// <param name="inputSampleRate">[in]  Sample rate of the input audio data of submix voice. This rate must be a multiple of  XAUDIO2_QUANTUM_DENOMINATOR.  InputSampleRate must be between XAUDIO2_MIN_SAMPLE_RATE and XAUDIO2_MAX_SAMPLE_RATE. </param>
 /// <param name="flags">[in]  Flags that specify the behavior of the submix voice. Can be 0 or the following: ValueDescriptionXAUDIO2_VOICE_USEFILTERThe filter effect should be available on this voice.? </param>
 /// <param name="processingStage">[in]  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 ProcessingStage value, and before all other voices  that include a larger ProcessingStage value. Voices that include the same  ProcessingStage value are processed in any order. A submix voice cannot send to  another submix voice with a lower or equal ProcessingStage value; this prevents  audio being lost due to a submix cycle. </param>
 /// <returns>No documentation.</returns>
 /// <unmanaged>HRESULT IXAudio2::CreateSubmixVoice([Out] IXAudio2SubmixVoice** ppSubmixVoice,[None] UINT32 InputChannels,[None] UINT32 InputSampleRate,[None] UINT32 Flags,[None] UINT32 ProcessingStage,[In, Optional] const XAUDIO2_VOICE_SENDS* pSendList,[In, Optional] const XAUDIO2_EFFECT_CHAIN* pEffectChain)</unmanaged>
 public SubmixVoice(XAudio2 device, int inputChannels, int inputSampleRate, SubmixVoiceFlags flags, int processingStage)
     : base(IntPtr.Zero)
 {
     device.CreateSubmixVoice(this, inputChannels, inputSampleRate,  flags, processingStage, null, null);
 }

        /// <summary>	
        /// Creates and configures a submix voice with an effect chain.	
        /// </summary>	
        /// <param name="device">an instance of <see cref = "SharpDX.XAudio2.XAudio2" /></param>
        /// <param name="inputChannels">[in]  Number of channels in the input audio data of the submix voice. InputChannels must be less than or equal to XAUDIO2_MAX_AUDIO_CHANNELS. </param>
        /// <param name="inputSampleRate">[in]  Sample rate of the input audio data of submix voice. This rate must be a multiple of  XAUDIO2_QUANTUM_DENOMINATOR.  InputSampleRate must be between XAUDIO2_MIN_SAMPLE_RATE and XAUDIO2_MAX_SAMPLE_RATE. </param>
        /// <param name="flags">[in]  Flags that specify the behavior of the submix voice. Can be 0 or the following: ValueDescriptionXAUDIO2_VOICE_USEFILTERThe filter effect should be available on this voice.? </param>
        /// <param name="processingStage">[in]  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 ProcessingStage value, and before all other voices  that include a larger ProcessingStage value. Voices that include the same  ProcessingStage value are processed in any order. A submix voice cannot send to  another submix voice with a lower or equal ProcessingStage value; this prevents  audio being lost due to a submix cycle. </param>
        /// <param name="effectDescriptors">[in, optional] Pointer to a list of XAUDIO2_EFFECT_CHAIN structures that describe an effect chain to use in the submix voice.</param>
        /// <returns>No documentation.</returns>
        /// <unmanaged>HRESULT IXAudio2::CreateSubmixVoice([Out] IXAudio2SubmixVoice** ppSubmixVoice,[None] UINT32 InputChannels,[None] UINT32 InputSampleRate,[None] UINT32 Flags,[None] UINT32 ProcessingStage,[In, Optional] const XAUDIO2_VOICE_SENDS* pSendList,[In, Optional] const XAUDIO2_EFFECT_CHAIN* pEffectChain)</unmanaged>
        public SubmixVoice(XAudio2 device, int inputChannels, int inputSampleRate, SubmixVoiceFlags flags, int processingStage, EffectDescriptor[] effectDescriptors)
            : base(IntPtr.Zero)
        {

            if (effectDescriptors != null)
            {
                unsafe
                {
                    var tempSendDescriptor = new EffectChain();
                    var effectDescriptorNatives = new EffectDescriptor.__Native[effectDescriptors.Length];
                    for (int i = 0; i < effectDescriptorNatives.Length; i++)
                        effectDescriptors[i].__MarshalTo(ref effectDescriptorNatives[i]);
                    tempSendDescriptor.EffectCount = effectDescriptorNatives.Length;
                    fixed (void* pEffectDescriptors = &effectDescriptorNatives[0])
                    {
                        tempSendDescriptor.EffectDescriptorPointer = (IntPtr)pEffectDescriptors;
                        device.CreateSubmixVoice(this, inputChannels, inputSampleRate, unchecked((int)flags), processingStage, null, tempSendDescriptor);
                    }
                }
            }
            else
            {
                device.CreateSubmixVoice(this, inputChannels, inputSampleRate, unchecked((int)flags), processingStage, null, null);
            }
        }