电话AudioConverterFillComplexBuffer结果CrashIfClientProvidedBogusAudioBufferList仅在MacOS塞拉利昂

Question

我有一个音频节目，使得以AudioConverterFillComplexBuffer调用下面的代码：

OSStatus error = AudioConverterFillComplexBuffer(recorderObj->audioConverter, 
                MyAudioConverterCallback, 
                (__bridge void *)playerLocal, 
                &ioOutputDataPackets, 
                convertedData, 
                &streamDesc); 

当这个代码在10.6-10.11运行时，它工作正常。当代码在10.12运行时，它用下面的消息

Crashed Thread:  16 com.apple.audio.IOThread.client 

Exception Type:  EXC_BAD_INSTRUCTION (SIGILL) 
Exception Codes:  0x0000000000000001, 0x0000000000000000 
Exception Note:  EXC_CORPSE_NOTIFY 

Termination Signal: Illegal instruction: 4 
Termination Reason: Namespace SIGNAL, Code 0x4 
Terminating Process: exc handler [0] 

调用栈中CrashIfClientProvidedBogusAudioBufferList结束崩溃。

大多数文章，文档和邮件列表会说我有一个糟糕的输出缓冲区，但对于我的生活，我不能告诉我会做什么错，但仍然有我的代码在所有版本的MacOS上工作，但最新。这里是我如何建立缓冲区：

AudioBufferList *convertedData = (AudioBufferList*)malloc(sizeof(AudioBufferList) * 2); 

convertedData->mNumberBuffers = 1; 
convertedData->mBuffers[0].mNumberChannels = 2; 
convertedData->mBuffers[0].mDataByteSize = 64 * 1024; 
convertedData->mBuffers[0].mData = (UInt8 *)malloc(sizeof(UInt8) * 64 * 1024); 

这里是在崩溃点的全栈

Thread 16 Crashed:: com.apple.audio.IOThread.client 
0 com.apple.audio.toolbox.AudioToolbox 0x00007fff89b9a330 CADebuggerStop() + 4 
1 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a21e71 CrashIfClientProvidedBogusAudioBufferList + 97 
2 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2f710 AudioConverterChain::CallInputProc(unsigned int) + 646 
3 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2f386 AudioConverterChain::FillBufferFromInputProc(unsigned int*, CABufferList*) + 130 
4 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2f2ee BufferedAudioConverter::GetInputBytes(unsigned int, unsigned int&, CABufferList const*&) + 178 
5 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2f1b2 CBRConverter::RenderOutput(CABufferList*, unsigned int, unsigned int&, AudioStreamPacketDescription*) + 106 
6 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2225d BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription*) + 281 
7 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2f2c3 BufferedAudioConverter::GetInputBytes(unsigned int, unsigned int&, CABufferList const*&) + 135 
8 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a9369b Resampler2Wrapper::RenderOutput(CABufferList*, unsigned int, unsigned int&) + 183 
9 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2225d BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription*) + 281 
10 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2f2c3 BufferedAudioConverter::GetInputBytes(unsigned int, unsigned int&, CABufferList const*&) + 135 
11 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2f1b2 CBRConverter::RenderOutput(CABufferList*, unsigned int, unsigned int&, AudioStreamPacketDescription*) + 106 
12 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2225d BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription*) + 281 
13 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2253f AudioConverterChain::RenderOutput(CABufferList*, unsigned int, unsigned int&, AudioStreamPacketDescription*) + 99 
14 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a2225d BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription*) + 281 
15 com.apple.audio.toolbox.AudioToolbox 0x00007fff89a21d2f AudioConverterFillComplexBuffer + 282 
16 com.pc-intercom.Intercom  0x0000000107a52803 0x107a4a000 + 34819 
17 com.apple.audio.units.Components 0x000000010a38c97c AUHAL::AUIOProc(unsigned int, AudioTimeStamp const*, AudioBufferList const*, AudioTimeStamp const*, AudioBufferList*, AudioTimeStamp const*, void*) + 2324 
18 com.apple.audio.CoreAudio  0x00007fff8a71f951 HALC_ProxyIOContext::IOWorkLoop() + 4369 
19 com.apple.audio.CoreAudio  0x00007fff8a71e667 HALC_ProxyIOContext::IOThreadEntry(void*) + 131 
20 com.apple.audio.CoreAudio  0x00007fff8a71e38b HALB_IOThread::Entry(void*) + 75 
21 libsystem_pthread.dylib   0x0000000108134aab _pthread_body + 180 
22 libsystem_pthread.dylib   0x00000001081349f7 _pthread_start + 286 
23 libsystem_pthread.dylib   0x0000000108134221 thread_start + 13 

如果任何人有我如何调试这个问题的任何建议，我会非常感谢帮助。

Answer 1

在MyAudioConverterCallback，ioDataPacketCount应该返回帧为LPCM（我想包是未压缩的音频帧），所以将其设置为：

*ioDataPacketCount = recorderObj->inputBuffer->mBuffers[0].mDataByteSize/recorderObj->streamFormat.mBytesPerFrame; 

传递一个NULLAudioStreamPacketDescription到AudioConverterFillComplexBuffer而不是数组的1（这在10.11导致我崩溃）。你的目标格式是LPCM，所以数据包描述是不必要的，因为你的“数据包”都是相同的大小。

同样，您的源格式也是LPCM，因此您可以删除返回MyAudioConverterCallback中数据包描述的代码 - 这也是错误的。

在我的机器上，我得到了非交错立体声streamFormat，这意味着MyAudioConverterCallback也必须填写ioData->mBuffers[1]。

设置您的convertedDataAudioBufferList时，sizePerPacket正在使用源格式数据包大小而不是目标数据包大小。它应该是：

sizePerPacket = mOutputFormat.mBytesPerPacket; 

最后，即使它没有崩溃，此代码不能因为你录音（比方说）从麦克风512帧，然后要求音频转换器转换成16384是正确的 - 这会给你音频故障。