Reverb2和kAudioUnitType
我有这个AUGraph配置
AudioUnitGraph 0x2505000:
Member Nodes:
node 1: 'aufx' 'ipeq' 'appl', instance 0x15599530 O
node 2: 'aufx' 'rvb2' 'appl', instance 0x1566ffd0 O
node 3: 'aufc' 'conv' 'appl', instance 0x15676900 O
node 4: 'aumx' 'mcmx' 'appl', instance 0x15676a30 O
node 5: 'aumx' 'mcmx' 'appl', instance 0x15677ac0 O
node 6: 'aumx' 'mcmx' 'appl', instance 0x15678a40 O
node 7: 'auou' 'rioc' 'appl', instance 0x15679a20 O
node 8: 'augn' 'afpl' 'appl', instance 0x1558b710 O
Connections:
node 7 bus 1 => node 5 bus 0 [ 1 ch, 44100 Hz, 'lpcm' (0x00000C2C) 8.24-bit little-endian signed integer, deinterleaved]
node 5 bus 0 => node 3 bus 0 [ 2 ch, 44100 Hz, 'lpcm' (0x00000C2C) 8.24-bit little-endian signed integer, deinterleaved]
node 3 bus 0 => node 2 bus 0 [ 2 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved]
node 2 bus 0 => node 6 bus 0 [ 1 ch, 44100 Hz, 'lpcm' (0x00000C2C) 8.24-bit little-endian signed integer, deinterleaved]
node 8 bus 0 => node 4 bus 0 [ 1 ch, 44100 Hz, 'lpcm' (0x00000C2C) 8.24-bit little-endian signed integer, deinterleaved]
node 4 bus 0 => node 6 bus 1 [ 2 ch, 44100 Hz, 'lpcm' (0x00000C2C) 8.24-bit little-endian signed integer, deinterleaved]
node 6 bus 0 => node 1 bus 0 [ 2 ch, 44100 Hz, 'lpcm' (0x00000C2C) 8.24-bit little-endian signed integer, deinterleaved]
node 1 bus 0 => node 7 bus 0 [ 2 ch, 0 Hz, 'lpcm' (0x00000029) 32-bit little-endian float, deinterleaved]
CurrentState:
mLastUpdateError=0, eventsToProcess=F, isInitialized=F, isRunning=F
和错误
AUGraphInitialize err = -10868
因为我已经在两个混音器单元之间连接了一个混响单元，即使我已经创建了一个转换器单元：
OSStatus err = noErr;
UInt32 micBus = 0;
UInt32 filePlayerBus = 1;
//// ionode:1 ----> vfxNode:0 bus 0
err = AUGraphConnectNodeInput(processingGraph, ioNode, 1, vfxNode, 0);
if (err) { NSLog(@"ioNode:1 ---> vfxNode:0 err = %ld", err); }
//// vfxNode:0 ---> convertNode:0
err = AUGraphConnectNodeInput(processingGraph, vfxNode, 0, convertNode, 0);
//// convertNode:0 ---> vfxRevNode:0
err = AUGraphConnectNodeInput(processingGraph, convertNode, 0, vfxRevNode, 0);
//// vfxRevNode:0 ---> mixerNode:0
err = AUGraphConnectNodeInput(processingGraph, vfxRevNode, 0, mixerNode, micBus );
//if (err) { NSLog(@"vfxRevNode:0 ---> mixerNode:0 err = %ld", err); }
//// vfxNode:0 ----> mixerNode:0
//err = AUGraphConnectNodeInput(processingGraph, vfxNode, 0, mixerNode, micBus );
if (err) { NSLog(@"vfxNode:0 ---> mixerNode:0 err = %ld", err); }
//// audioPlayerNode:0 ----> fxNode:0
err = AUGraphConnectNodeInput(processingGraph, audioPlayerNode, 0, fxNode, 0);
if (err) { NSLog(@"audioPlayerNode:0 ---> fxNode:0 err = %ld", err); }
//// fxNode:0 ----> mixerNode:1
err = AUGraphConnectNodeInput(processingGraph, fxNode, 0, mixerNode, filePlayerBus);
if (err) { NSLog(@"fxNode:0 ---> mixerNode:1 err = %ld", err); }
///// mixerNode:0 ----> eqNode:0
err = AUGraphConnectNodeInput(processingGraph, mixerNode, 0, eqNode, 0);
if (err) { NSLog(@"mixerNode:0 ---> eqNode:0 err = %ld", err); }
//// eqNode:0 ----> ioNode:0
err = AUGraphConnectNodeInput(processingGraph, eqNode, 0, ioNode, 0);
if (err) { NSLog(@"eqNode:0 ---> ioNode:0 err = %ld", err); }
这里是节点：
////
//// EQ NODE
////
err = AUGraphAddNode(processingGraph, &EQUnitDescription, &eqNode);
if (err) { NSLog(@"eqNode err = %ld", err); }
////
//// REV NODE
////
err = AUGraphAddNode(processingGraph, &ReverbUnitDescription, &vfxRevNode);
if (err) { NSLog(@"vfxRevNode err = %ld", err); }
////
//// FORMAT CONVERTER NODE
////
err = AUGraphAddNode (processingGraph, &convertUnitDescription, &convertNode);
if (err) { NSLog(@"convertNode err = %ld", err); }
////
//// FX NODE
////
err = AUGraphAddNode(processingGraph, &FXUnitDescription, &fxNode);
if (err) { NSLog(@"fxNode err = %ld", err); }
////
//// VFX NODE
////
err = AUGraphAddNode(processingGraph, &VFXUnitDescription, &vfxNode);
if (err) { NSLog(@"vfxNode err = %ld", err); }
///
/// MIXER NODE
///
err = AUGraphAddNode (processingGraph, &MixerUnitDescription, &mixerNode );
if (err) { NSLog(@"mixerNode err = %ld", err); }
///
/// OUTPUT NODE
///
err = AUGraphAddNode(processingGraph, &iOUnitDescription, &ioNode);
if (err) { NSLog(@"outputNode err = %ld", err); }
////
/// PLAYER NODE
///
err = AUGraphAddNode(processingGraph, &playerUnitDescription, &audioPlayerNode);
if (err) { NSLog(@"audioPlayerNode err = %ld", err); }
和组件说明：
OSStatus err = noErr;
err = NewAUGraph(&processingGraph);
// OUTPUT unit
AudioComponentDescription iOUnitDescription;
iOUnitDescription.componentType = kAudioUnitType_Output;
iOUnitDescription.componentSubType = kAudioUnitSubType_RemoteIO;//kAudioUnitSubType_VoiceProcessingIO;//kAudioUnitSubType_RemoteIO;
iOUnitDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
iOUnitDescription.componentFlags = 0;
iOUnitDescription.componentFlagsMask = 0;
// MIXER unit
AudioComponentDescription MixerUnitDescription;
MixerUnitDescription.componentType = kAudioUnitType_Mixer;
MixerUnitDescription.componentSubType = kAudioUnitSubType_MultiChannelMixer;
MixerUnitDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
MixerUnitDescription.componentFlags = 0;
MixerUnitDescription.componentFlagsMask = 0;
// PLAYER unit
AudioComponentDescription playerUnitDescription;
playerUnitDescription.componentType = kAudioUnitType_Generator;
playerUnitDescription.componentSubType = kAudioUnitSubType_AudioFilePlayer;
playerUnitDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
// EQ unit
AudioComponentDescription EQUnitDescription;
EQUnitDescription.componentType = kAudioUnitType_Effect;
EQUnitDescription.componentSubType = kAudioUnitSubType_AUiPodEQ;
EQUnitDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
EQUnitDescription.componentFlags = 0;
EQUnitDescription.componentFlagsMask = 0;
// Reverb unit
AudioComponentDescription ReverbUnitDescription;
ReverbUnitDescription.componentType = kAudioUnitType_Effect;
ReverbUnitDescription.componentSubType = kAudioUnitSubType_Reverb2;
ReverbUnitDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
ReverbUnitDescription.componentFlags = 0;
ReverbUnitDescription.componentFlagsMask = 0;
// Format Converter between VFX and Reverb units
AudioComponentDescription convertUnitDescription;
convertUnitDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
convertUnitDescription.componentType = kAudioUnitType_FormatConverter;
convertUnitDescription.componentSubType = kAudioUnitSubType_AUConverter;
convertUnitDescription.componentFlags = 0;
convertUnitDescription.componentFlagsMask = 0;
// FX unit
AudioComponentDescription FXUnitDescription;
FXUnitDescription.componentType = kAudioUnitType_Mixer;
FXUnitDescription.componentSubType = kAudioUnitSubType_MultiChannelMixer;
FXUnitDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
FXUnitDescription.componentFlags = 0;
FXUnitDescription.componentFlagsMask = 0;
// VFX unit
AudioComponentDescription VFXUnitDescription;
VFXUnitDescription.componentType = kAudioUnitType_Mixer;
VFXUnitDescription.componentSubType = kAudioUnitSubType_MultiChannelMixer;
VFXUnitDescription.componentManufacturer = kAudioUnitManufacturer_Apple;
VFXUnitDescription.componentFlags = 0;
VFXUnitDescription.componentFlagsMask = 0;
我创建了转换器节点的设置，将输入节点流格式（即混音器单元）和输出节点流格式作为输出格式（即混响）作为输入，
OSStatus err = noErr;
err = AUGraphNodeInfo(processingGraph, convertNode, NULL, &convertUnit);
if (err) { NSLog(@"setupConverterUnit error = %ld", err); }
// set converter input format to vfxunit format
AudioStreamBasicDescription asbd = {0};
size_t bytesPerSample;
bytesPerSample = sizeof(SInt16);
asbd.mFormatID = kAudioFormatLinearPCM;
asbd.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
asbd.mBitsPerChannel = 8 * bytesPerSample;
asbd.mFramesPerPacket = 1;
asbd.mChannelsPerFrame = 1;
asbd.mBytesPerPacket = bytesPerSample * asbd.mFramesPerPacket;
asbd.mBytesPerFrame = bytesPerSample * asbd.mChannelsPerFrame;
asbd.mSampleRate = sampleRate;
err = AudioUnitSetProperty(convertUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &asbd, sizeof(asbd));
if (err) { NSLog(@"setupConverterUnit kAudioUnitProperty_StreamFormat error = %ld", err); }
// set converter output format to reverb format
UInt32 streamFormatSize = sizeof(monoStreamFormat);
err = AudioUnitSetProperty(convertUnit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 0, &monoStreamFormat, streamFormatSize);
if (err) { NSLog(@"setupConverterUnit kAudioUnitProperty_StreamFormat error = %ld", err); }
混响单元配置如下：
OSStatus err = noErr;
err = AUGraphNodeInfo(processingGraph, vfxRevNode, NULL, &vfxRevUnit);
if (err) { NSLog(@"setupReverbUnit err = %ld", err); }
UInt32 size = sizeof(mReverbPresetArray);
err = AudioUnitGetProperty(vfxRevUnit, kAudioUnitProperty_FactoryPresets, kAudioUnitScope_Global, 0, &mReverbPresetArray, &size);
if (err) { NSLog(@"kAudioUnitProperty_FactoryPresets err = %ld", err); }
printf("setupReverbUnit Preset List:n");
UInt8 count = CFArrayGetCount(mReverbPresetArray);
for (int i = 0; i < count; ++i) {
AUPreset *aPreset = (AUPreset*)CFArrayGetValueAtIndex(mReverbPresetArray, i);
CFShow(aPreset->presetName);
}
和输入混合器单元一样
OSStatus err;
err = AUGraphNodeInfo(processingGraph, vfxNode, NULL, &vfxUnit);
if (err) { NSLog(@"setVFxUnit err = %ld", err); }
UInt32 busCount = 1;
err = AudioUnitSetProperty (
vfxUnit,
kAudioUnitProperty_ElementCount,
kAudioUnitScope_Input,
0,
&busCount,
sizeof (busCount)
);
AudioStreamBasicDescription asbd = {0};
size_t bytesPerSample;
bytesPerSample = sizeof(SInt16);
asbd.mFormatID = kAudioFormatLinearPCM;
asbd.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
asbd.mBitsPerChannel = 8 * bytesPerSample;
asbd.mFramesPerPacket = 1;
asbd.mChannelsPerFrame = 1;
asbd.mBytesPerPacket = bytesPerSample * asbd.mFramesPerPacket;
asbd.mBytesPerFrame = bytesPerSample * asbd.mChannelsPerFrame;
asbd.mSampleRate = sampleRate;
err = AudioUnitSetProperty (
vfxUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input,
0,
&asbd,
sizeof (asbd)
);
到目前为止没有办法让它工作。 我需要混响单元，因为在进入下一个混音器单元之前我需要麦克风输入。
我在转换器上的AudioStreamBasicDescription出错了？
编辑发生的是没有声音。 音频图形没有被初始化，并且出现错误
AUGraphInitialize err = -10868
这里描述的图表可以用这种方式描述
连接到vfxNode以获取渲染回调的麦克风输入。 它连接到总线0上的混音器。歌曲播放器节点连接到另一个混音器，其中有第二个呈现回调，用于处理播放中的音频。 这连接到链中最后一个混音器的总线1。 eq节点将混音器连接到输出ioNode。
当在fx调音台（vfxNode）和混响之间使用转换器节点时，再也没有声音了：
//// vfxNode:0 ---> convertNode:0
err = AUGraphConnectNodeInput(processingGraph, vfxNode, 0, convertNode, 0);
//// convertNode:0 ---> vfxRevNode:0
err = AUGraphConnectNodeInput(processingGraph, convertNode, 0, vfxRevNode, 0);
//// vfxRevNode:0 ---> mixerNode:0
err = AUGraphConnectNodeInput(processingGraph, vfxRevNode, 0, mixerNode, micBus );
//if (err) { NSLog(@"vfxRevNode:0 ---> mixerNode:0 err = %ld", err); }
没有混响节点因此没有转换器节点一切正常工作：
//// ionode:1 ----> vfxNode:0 bus 0
err = AUGraphConnectNodeInput(processingGraph, ioNode, 1, vfxNode, 0);
if (err) { NSLog(@"ioNode:1 ---> vfxNode:0 err = %ld", err); }
//// vfxNode:0 ----> mixerNode:0
err = AUGraphConnectNodeInput(processingGraph, vfxNode, 0, mixerNode, micBus );
if (err) { NSLog(@"vfxNode:0 ---> mixerNode:0 err = %ld", err); }
你没有说过问题是什么（错误，没有声音等），但我愿意猜测。 这些效果单元倾向于是浮点PCM，并且通常会拒绝连接到任何非浮点（非效果单元通常默认为整数或固定点）。 当你尝试启动图表时，你会得到-50（paramErr）吗？
我发现使用效果单位必须做的是读取效果单元默认的ASBD（输入或输出范围），然后在整个图表中设置它（其他单位通常愿意接受浮点数ASBDs）。 请注意，这将是大约100行boilerlplate，您可以从每个节点获取单位，从效果的输入或输出范围获取ASBD（不要认为这很重要），然后将其设置为接收的格式或由图表中的任何单位生成。 祝你好运。
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