我試圖讓音頻隊列在iphone應用程序上工作,並且每當調用AudioQueueStart時它都會提供「fmt?」結果碼(kAudioFormatUnsupportedDataFormatError)。在下面的代碼中,我將格式設置爲kAudioFormatLinearPCM,該格式肯定受支持。我究竟做錯了什麼?AudioQueueStart報告不支持的格式
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);
數據是類型audioData其是這樣的:
typedef struct _audioData {
AudioQueueRef mQueue;
AudioQueueBufferRef mBuffers[NUMBUFFERS];
AudioStreamBasicDescription mDataFormat;
} audioData;
謝謝
嗨! 我有同樣的問題。更改不同的標誌對我無用。可能是iPad模擬器不支持錄音? – 2011-01-30 14:29:45