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mcaudioinputqueue's Introduction

MCAudioInputQueue

Simple Recorder based on AudioQueue

Usage

set AudioSession

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];

init & start inputQueue

MCAudioInputQueue *_recorder;
AudioStreamBasicDescription format;
format.mFormatID = kAudioFormatLinearPCM;
format.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
format.mBitsPerChannel = 16;
format.mChannelsPerFrame = 1;
format.mBytesPerPacket = _format.mBytesPerFrame = (_format.mBitsPerChannel / 8) * format.mChannelsPerFrame;
format.mFramesPerPacket = 1;
format.mSampleRate = 8000.0f;

_recorder = [MCAudioInputQueue inputQueueWithFormat:format bufferDuration:0.2 delegate:self];
[_recorder start];

handle data & error

- (void)inputQueue:(MCAudioInputQueue *)inputQueue inputData:(NSData *)data numberOfPackets:(UInt32)numberOfPackets
{
    //handle data
}

- (void)inputQueue:(MCAudioInputQueue *)inputQueue errorOccur:(NSError *)error
{
    //handle error
}

mcaudioinputqueue's People

Contributors

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mcaudioinputqueue's Issues

Possible memory leak in MCAudioQueueInput

In the callback function, because the function is called on the internal thread of AudioQueue, which is a NSThread, the use of subRangeOfData is dangerous and will cause the memory leak. By default, NSThread has no autoreleasepool and we need to manually add it.

I recommend adding an autoreleasepool to avoid the possible memory leak.

关于pcm数据格式的转换。

项目有个实时对讲功能。需要将pcm实时数据转成G711a数据格式。我试了网上一个c++库转为g711a,但是摄像头那边有杂音,几乎听不到声音,,请问您能提供个思路或者demo吗?一下是我c++后台那边提供的结构体参数 struct TMSG_AUDIODATAGSM
: TMSG_HEADER
{
unsigned char Buffer[160];
TMSG_AUDIODATAGSM()
:TMSG_HEADER(MSG_AUDIODATAGSM)
{
memset(Buffer,0,160);
}
};
不知道如何处理这个 unsigned char Buffer[160];

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