我试图让音频队列在iphone应用程序上工作,并且每当调用AudioQueueStart时它都会提供“fmt?”结果码(kAudioFormatUnsupportedDataFormatError)。在下面的代码中,我将格式设置为kAudioFormatLinearPCM,该格式肯定受支持。我究竟做错了什么?AudioQueueStart报告不支持的格式
data.mDataFormat.mSampleRate = 44100;
data.mDataFormat.mFormatID = kAudioFormatLinearPCM;
data.mDataFormat.mFormatFlags = 0;
data.mDataFormat.mBytesPerPacket = 4;
data.mDataFormat.mFramesPerPacket = 1;
data.mDataFormat.mBytesPerFrame = 4;
data.mDataFormat.mChannelsPerFrame = 2;
data.mDataFormat.mBitsPerChannel = 16;
OSStatus status;
status = AudioQueueNewOutput(&data.mDataFormat, audioCallback, &data, CFRunLoopGetCurrent(), kCFRunLoopCommonModes, 0, &data.mQueue);
for (int i = 0; i < NUMBUFFERS; ++i)
{
status = AudioQueueAllocateBuffer (data.mQueue, BUFFERSIZE, &data.mBuffers[i]);
audioCallback (&data, data.mQueue, data.mBuffers[i]);
}
Float32 gain = 1.0;
status = AudioQueueSetParameter (data.mQueue, kAudioQueueParam_Volume, gain);
status = AudioQueueStart(data.mQueue, NULL);
数据是类型audioData其是这样的:
typedef struct _audioData {
AudioQueueRef mQueue;
AudioQueueBufferRef mBuffers[NUMBUFFERS];
AudioStreamBasicDescription mDataFormat;
} audioData;
谢谢
嗨! 我有同样的问题。更改不同的标志对我无用。可能是iPad模拟器不支持录音? – 2011-01-30 14:29:45