bool CreateAUGraph () { processingGraph = new AUGraph (); int samplerNode, ioNode; var musicSampler = new AudioComponentDescription () { ComponentManufacturer = AudioComponentManufacturerType.Apple, ComponentType = AudioComponentType.MusicDevice, ComponentSubType = (int)AudioTypeMusicDevice.Sampler }; samplerNode = processingGraph.AddNode (musicSampler); var remoteOutput = new AudioComponentDescription () { ComponentManufacturer = AudioComponentManufacturerType.Apple, ComponentType = AudioComponentType.Output, ComponentSubType = (int)AudioTypeOutput.Remote }; ioNode = processingGraph.AddNode (remoteOutput); processingGraph.Open (); processingGraph.ConnnectNodeInput ( sourceNode: samplerNode, sourceOutputNumber: 0, destNode: ioNode, destInputNumber: 0); samplerUnit = processingGraph.GetNodeInfo (samplerNode); ioUnit = processingGraph.GetNodeInfo (ioNode); return true; }
bool createAUGraph () { AUGraphError result = 0; int samplerNode, ioNode; var cd = new AudioComponentDescription () { ComponentManufacturer = AudioComponentManufacturerType.Apple, ComponentFlags = 0, ComponentFlagsMask = 0 }; processingGraph = new AUGraph (); cd.ComponentType = AudioComponentType.MusicDevice; cd.ComponentSubType = (int)AudioTypeMusicDevice.Sampler; //0x73616d70; samplerNode = processingGraph.AddNode (cd); cd.ComponentType = AudioComponentType.Output; cd.ComponentSubType = (int)AudioTypeOutput.Remote; //0x72696f63; ioNode = processingGraph.AddNode (cd); processingGraph.Open (); result = processingGraph.ConnnectNodeInput (samplerNode, 0, ioNode, 0); if (result != AUGraphError.OK) throw new Exception ("Unable to open the audio processing graph. Error code: " + result); samplerUnit = processingGraph.GetNodeInfo (samplerNode); ioUnit = processingGraph.GetNodeInfo (ioNode); return true; }
void prepareAUGraph() { // Creating audio graph instance _auGraph = AUGraph.CreateInstance(); // getting audio node and audio unit AudioComponentDescription cd = new AudioComponentDescription() { componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output, componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO, componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple, componentFlags = 0, componentFlagsMask = 0 }; int remoteIONode = _auGraph.AddNode(cd); AudioUnit remoteIOUnit = _auGraph.GetNodeInfo(remoteIONode); // turning on microphone remoteIOUnit.SetEnableIO(true, AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input, 1 // remote input ); // audio canonical format AudioStreamBasicDescription audioFormat = CanonicalASBD(44100, 1); remoteIOUnit.SetAudioFormat(audioFormat, AudioUnit.AudioUnitScopeType.kAudioUnitScope_Output, // output bus of Remote input 1 // Remote input ); remoteIOUnit.SetAudioFormat(audioFormat, AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input, 0 // Remote output, ); // Connecting Remote Input to Remote Output _auGraph.ConnnectNodeInput( remoteIONode, 1, remoteIONode, 0); // getting output audio format _audioUnitOutputFormat = remoteIOUnit.GetAudioFormat( AudioUnit.AudioUnitScopeType.kAudioUnitScope_Output, // Remote output bus 0 // Remote output ); _auGraph.RenderCallback += new EventHandler<AudioGraphEventArgs>(_auGraph_RenderCallback); // graph initialization _auGraph.Initialize(); }
void prepareAUGraph() { // Creating audio graph instance _auGraph = new AUGraph (); _auGraph.Open (); // getting audio node and audio unit var cd = AudioComponentDescription.CreateOutput (AudioTypeOutput.Remote); int remoteIONode = _auGraph.AddNode(cd); AudioUnit remoteIOUnit = _auGraph.GetNodeInfo(remoteIONode); // turning on microphone remoteIOUnit.SetEnableIO(true, AudioUnitScopeType.Input, 1 // remote input ); // audio canonical format AudioStreamBasicDescription audioFormat = CanonicalASBD(44100, 1); remoteIOUnit.SetAudioFormat(audioFormat, AudioUnitScopeType.Output, // output bus of Remote input 1 // Remote input ); remoteIOUnit.SetAudioFormat(audioFormat, AudioUnitScopeType.Input, 0 // Remote output, ); // Connecting Remote Input to Remote Output _auGraph.ConnnectNodeInput( remoteIONode, 1, remoteIONode, 0); // getting output audio format _audioUnitOutputFormat = remoteIOUnit.GetAudioFormat( AudioUnitScopeType.Output, // Remote output bus 0 // Remote output ); _auGraph.RenderCallback += new EventHandler<AudioGraphEventArgs>(_auGraph_RenderCallback); // graph initialization _auGraph.Initialize(); }
public void InitializeAUGraph () { Debug.Print ("Initialize"); LoadFiles (); graph = new AUGraph (); // create two AudioComponentDescriptions for the AUs we want in the graph // output unit var outputNode = graph.AddNode (AudioComponentDescription.CreateOutput (AudioTypeOutput.Remote)); // mixer node var mixerNode = graph.AddNode (AudioComponentDescription.CreateMixer (AudioTypeMixer.MultiChannel)); // connect a node's output to a node's input if (graph.ConnnectNodeInput (mixerNode, 0, outputNode, 0) != AUGraphError.OK) throw new ApplicationException (); // open the graph AudioUnits are open but not initialized (no resource allocation occurs here) if (graph.TryOpen () != 0) throw new ApplicationException (); mixer = graph.GetNodeInfo (mixerNode); // set bus count const uint numbuses = 2; Debug.Print ("Set input bus count {0}", numbuses); if (mixer.SetElementCount (AudioUnitScopeType.Input, numbuses) != AudioUnitStatus.OK) throw new ApplicationException (); AudioStreamBasicDescription desc; for (uint i = 0; i < numbuses; ++i) { // setup render callback if (graph.SetNodeInputCallback (mixerNode, i, HandleRenderDelegate) != AUGraphError.OK) throw new ApplicationException (); // set input stream format to what we want desc = mixer.GetAudioFormat (AudioUnitScopeType.Input, i); //desc.ChangeNumberChannels(2, false); desc.SampleRate = GraphSampleRate; mixer.SetAudioFormat (desc, AudioUnitScopeType.Input, i); } // set output stream format to what we want desc = mixer.GetAudioFormat (AudioUnitScopeType.Output); //desc.ChangeNumberChannels(2, false); desc.SampleRate = GraphSampleRate; mixer.SetAudioFormat (desc, AudioUnitScopeType.Output); // now that we've set everything up we can initialize the graph, this will also validate the connections if (graph.Initialize () != AUGraphError.OK) throw new ApplicationException (); }
void StreamPropertyListenerProc (object sender, PropertyFoundEventArgs args) { if (args.Property == AudioFileStreamProperty.DataFormat) { dataFormat = audioFileStream.DataFormat; return; } if (args.Property != AudioFileStreamProperty.ReadyToProducePackets) return; if (audioQueue != null) { // TODO: Dispose throw new NotImplementedException (); } audioQueue = new OutputAudioQueue (dataFormat); audioQueue.OutputCompleted += HandleOutputCompleted; AudioQueueStatus status; aqTap = audioQueue.CreateProcessingTap (TapProc, AudioQueueProcessingTapFlags.PreEffects, out status); if (status != AudioQueueStatus.Ok) throw new ApplicationException ("Could not create AQ tap"); // create an augraph to process in the tap. needs to convert from tapFormat to effect format and back /* note: this is invalidname's recipe to do an in-place effect when a format conversion is needed before and after the effect, usually because effects want floats, and everything else in iOS core audio works with ints (or, in rare cases, fixed-point). the graph looks like this: [render-callback] -> [converter] -> [effect] -> [converter] -> [generic-output] prior to calling AudioUnitRender() on generic-output the ioData to a pointer that render-callback knows about, and NULLs the ioData provided to AudioUnitRender(). the NULL tells generic-output to pull from its upstream units (ie, the augraph), and copying off the ioData pointer allows the render-callback to provide it to the front of the stream. in some locales, this kind of shell game is described as "batshit crazy", but it seems to work pretty well in practice. */ auGraph = new AUGraph (); auGraph.Open (); var effectNode = auGraph.AddNode (AudioComponentDescription.CreateConverter (AudioTypeConverter.NewTimePitch)); effectUnit = auGraph.GetNodeInfo (effectNode); var convertToEffectNode = auGraph.AddNode (AudioComponentDescription.CreateConverter (AudioTypeConverter.AU)); var convertToEffectUnit = auGraph.GetNodeInfo (convertToEffectNode); var convertFromEffectNode = auGraph.AddNode (AudioComponentDescription.CreateConverter (AudioTypeConverter.AU)); var convertFromEffectUnit = auGraph.GetNodeInfo (convertFromEffectNode); var genericOutputNode = auGraph.AddNode (AudioComponentDescription.CreateOutput (AudioTypeOutput.Generic)); genericOutputUnit = auGraph.GetNodeInfo (genericOutputNode); // set the format conversions throughout the graph var effectFormat = effectUnit.GetAudioFormat (AudioUnitScopeType.Output); var tapFormat = aqTap.ProcessingFormat; convertToEffectUnit.SetAudioFormat (tapFormat, AudioUnitScopeType.Input); convertToEffectUnit.SetAudioFormat (effectFormat, AudioUnitScopeType.Output); convertFromEffectUnit.SetAudioFormat (effectFormat, AudioUnitScopeType.Input); convertFromEffectUnit.SetAudioFormat (tapFormat, AudioUnitScopeType.Output); genericOutputUnit.SetAudioFormat (tapFormat, AudioUnitScopeType.Input); genericOutputUnit.SetAudioFormat (tapFormat, AudioUnitScopeType.Output); // set maximum fames per slice higher (4096) so we don't get kAudioUnitErr_TooManyFramesToProcess const uint maxFramesPerSlice = 4096; if (convertToEffectUnit.SetMaximumFramesPerSlice (maxFramesPerSlice, AudioUnitScopeType.Global) != AudioUnitStatus.OK) throw new ApplicationException (); if (effectUnit.SetMaximumFramesPerSlice (maxFramesPerSlice, AudioUnitScopeType.Global) != AudioUnitStatus.OK) throw new ApplicationException (); if (convertFromEffectUnit.SetMaximumFramesPerSlice (maxFramesPerSlice, AudioUnitScopeType.Global) != AudioUnitStatus.OK) throw new ApplicationException (); if (genericOutputUnit.SetMaximumFramesPerSlice (maxFramesPerSlice, AudioUnitScopeType.Global) != AudioUnitStatus.OK) throw new ApplicationException (); // connect the nodes auGraph.ConnnectNodeInput (convertToEffectNode, 0, effectNode, 0); auGraph.ConnnectNodeInput (effectNode, 0, convertFromEffectNode, 0); auGraph.ConnnectNodeInput (convertFromEffectNode, 0, genericOutputNode, 0); // set up the callback into the first convert unit if (convertToEffectUnit.SetRenderCallback (ConvertInputRenderCallback, AudioUnitScopeType.Global) != AudioUnitStatus.NoError) throw new ApplicationException (); var res = auGraph.Initialize (); if (res != AUGraphError.OK) throw new ApplicationException (); }
void prepareAUGraph() { // Creating audio graph instance _auGraph = AUGraph.CreateInstance(); // Adding Remote IO node to AUGraph AudioComponentDescription cd = new AudioComponentDescription() { componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output, componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO, componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple, componentFlags = 0, componentFlagsMask = 0 }; int remoteIONode = _auGraph.AddNode(cd); // Preparing AudioComponentDescrption of MultiChannelMixer cd.componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Mixer; cd.componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_MultiChannelMixer; int multiChannelMixerNode = _auGraph.AddNode(cd); // Setting callback method as the case of Audio Unit for (int i = 0; i < _waveDef.Length; i++) { var callbackStruct = new AudioUnit.AURenderCallbackStrct(); callbackStruct.inputProc = device_renderCallback; // setting callback function callbackStruct.inputProcRefCon = GCHandle.ToIntPtr(_handle); // a pointer that passed to the renderCallback (IntPtr inRefCon) _auGraph.AUGraphSetNodeInputCallback( multiChannelMixerNode, (uint)i, // bus number callbackStruct); } var remoteIOAudioUnit = _auGraph.GetNodeInfo(remoteIONode); var multiChannelMixerAudioUnit = _auGraph.GetNodeInfo(multiChannelMixerNode); // Getting an AudioUnit canonical description var audioFormat = AudioUnitUtils.AUCanonicalASBD(44100.0, 2); // applying the audio format to each audio units remoteIOAudioUnit.SetAudioFormat(audioFormat, AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input, 0); multiChannelMixerAudioUnit.SetAudioFormat(audioFormat, AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input, 0); // connecting multiChannelMixerNode(bus:0) to remoteIONode(bus:0) _auGraph.ConnnectNodeInput( multiChannelMixerNode, 0, // output bus remoteIONode, 0 // input bus ); // graph initialization _auGraph.Initialize(); }
public AudioVoice(AudioEngine engine, SoundEffectInstance effectInstance, WaveFormat desiredFormat) { if (engine == null) throw new ArgumentNullException("engine"); if (desiredFormat == null) throw new ArgumentNullException("desiredFormat"); audioEngine = engine; soundEffectInstance = effectInstance; waveFormat = desiredFormat; BusIndexMixer = uint.MaxValue; if (desiredFormat.BitsPerSample != 16) throw new AudioSystemInternalException("Invalid Audio Format. " + desiredFormat.BitsPerSample + " bits by sample is not supported."); lock (StaticMembersLock) { if (nbOfInstances == 0) { // Create the Audio Graph audioGraph = new AUGraph(); // Open the graph (does not initialize it yet) audioGraph.Open(); // Create the AudioComponentDescrition corresponding to the IO Remote output and MultiChannelMixer var remoteInOutComponentDesc = AudioComponentDescription.CreateOutput(AudioTypeOutput.Remote); var mixerMultiChannelComponentDesc = AudioComponentDescription.CreateMixer(AudioTypeMixer.MultiChannel); var mixer3DComponentDesc = AudioComponentDescription.CreateMixer(AudioTypeMixer.Spacial); // Add the Audio Unit nodes to the AudioGraph var outputUnitNodeId = audioGraph.AddNode(remoteInOutComponentDesc); var idChannelMixerNode = audioGraph.AddNode(mixerMultiChannelComponentDesc); var id3DMixerNode = audioGraph.AddNode(mixer3DComponentDesc); // Connect the nodes together CheckGraphError(audioGraph.ConnnectNodeInput(idChannelMixerNode, 0, outputUnitNodeId, 0), "Connection of the graph node failed."); CheckGraphError(audioGraph.ConnnectNodeInput(id3DMixerNode, 0, idChannelMixerNode, MaxNumberOfTracks), "Connection of the graph node failed."); // Get the MixerUnit objects unitChannelMixer = audioGraph.GetNodeInfo(idChannelMixerNode); unit3DMixer = audioGraph.GetNodeInfo(id3DMixerNode); // Set the mixers' output formats (the stream format is propagated along the linked input during the graph initialization) var desiredSampleRate = (engine.AudioSampleRate != 0) ? engine.AudioSampleRate : AudioUnitOutputSampleRate; unit3DMixer.SetAudioFormat(CreateLinear16BitsPcm(2, desiredSampleRate), AudioUnitScopeType.Output); unitChannelMixer.SetAudioFormat(CreateLinear16BitsPcm(2, desiredSampleRate), AudioUnitScopeType.Output); // set the element count to the max number of possible tracks before initializing the audio graph CheckUnitStatus(unitChannelMixer.SetElementCount(AudioUnitScopeType.Input, MaxNumberOfTracks+1), string.Format("Failed to set element count on ChannelMixer [{0}]", MaxNumberOfTracks+1)); // +1 for the 3DMixer output CheckUnitStatus(unit3DMixer.SetElementCount(AudioUnitScopeType.Input, MaxNumberOfTracks), string.Format("Failed to set element count on 3DMixer [{0}]", MaxNumberOfTracks)); // set a null renderer callback to the channel and 3d mixer input bus for (uint i = 0; i < MaxNumberOfTracks; i++) { CheckUnitStatus((AudioUnitStatus)SetInputRenderCallbackToNull(unit3DMixer.Handle, i), "Failed to set the render callback"); CheckUnitStatus((AudioUnitStatus)SetInputRenderCallbackToNull(unitChannelMixer.Handle, i), "Failed to set the render callback"); } // Initialize the graph (validation of the topology) CheckGraphError(audioGraph.Initialize(), "The audio graph initialization failed."); // Start audio rendering CheckGraphError(audioGraph.Start(), "Audio Graph could not start."); // disable all the input bus at the beginning for (uint i = 0; i < MaxNumberOfTracks; i++) { CheckUnitStatus(unitChannelMixer.SetParameter(AudioUnitParameterType.MultiChannelMixerEnable, 0f, AudioUnitScopeType.Input, i), "Failed to enable/disable the ChannelMixerInput."); CheckUnitStatus(unit3DMixer.SetParameter((AudioUnitParameterType)_3DMixerParametersIds.Enable, 0f, AudioUnitScopeType.Input, i), "Failed to enable/disable the 3DMixerInput."); } // At initialization all UnitElement are available. availableMixerBusIndices = new Queue<uint>(); for (uint i = 0; i < MaxNumberOfTracks; i++) availableMixerBusIndices.Enqueue(i); } ++nbOfInstances; // Create a AudioDataRendererInfo for the sounds. pAudioDataRendererInfo = (AudioDataRendererInfo*)Utilities.AllocateClearedMemory(sizeof(AudioDataRendererInfo)); pAudioDataRendererInfo->HandleChannelMixer = unitChannelMixer.Handle; pAudioDataRendererInfo->Handle3DMixer = unit3DMixer.Handle; } }