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标题: ios - AudioFileWriteBytes 的工作时间太长了 [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-13 06:46
标题: ios - AudioFileWriteBytes 的工作时间太长了

这个问题对于这个空间来说可能有点过于庞大和模糊，但我会试一试。

我有一系列样本，我正试图将它们写入我的 iOS 上的 .wav 文件，这需要长达一分半钟的时间。这是发生拖动的循环:

for (int i=0; i< 1430529; i++)  // 1430529 is the length of the array of samples 
    {

        SInt16 sample;

        sample = sample_array[i];



        audioErr = AudioFileWriteBytes(audioFile, false, sampleCount*2, &bytesToWrite, &sample);

        sampleCount++;
    }

有什么想法吗？

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编辑 1

如果有帮助，这是它前面的代码:

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];




// THIS IS MY BIT TO CONVERT THE LOCATION TO NSSTRING
NSString *filePath = [[NSString alloc]init];
filePath = [NSString stringWithUTF8String:location];

// HERE I WANT TO REMOVE THE FILE NAME FROM THE LOCATION.
NSString *truncatedFilePath = filePath;

truncatedFilePath = [truncatedFilePath stringByReplacingOccurrencesOfString"/recordedFile.wav"
                                    // withString"/newFile.caf"];
                                    withString"/recordedFile.wav"];




NSLog(truncatedFilePath);



NSURL *fileURL = [NSURL fileURLWithPath:truncatedFilePath];



AudioStreamBasicDescription asbd;


memset(&asbd,0, sizeof(asbd));

asbd.mSampleRate = SAMPLE_RATE;
asbd.mFormatID = kAudioFormatLinearPCM;


asbd.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;


asbd.mBitsPerChannel = 16;
asbd.mChannelsPerFrame = 1;
asbd.mFramesPerPacket = 1;
asbd.mBytesPerFrame = 2;
asbd.mBytesPerPacket = 2;






AudioFileID audioFile;

OSStatus audioErr = noErr;

audioErr = AudioFileCreateWithURL((CFURLRef)fileURL, kAudioFileWAVEType, &asbd, kAudioFileFlags_EraseFile, &audioFile);

assert (audioErr == noErr);


long sampleCount = 0;
UInt32 bytesToWrite = 2;

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Best Answer-推荐答案

为什么需要循环？你不能一口气写完所有的样本吗，例如

    numSamples = 1430529;
    bytesToWrite = numSamples * 2;
    audioErr = AudioFileWriteBytes(audioFile, false, 0, &bytesToWrite, sample_array);

?

关于ios - AudioFileWriteBytes 的工作时间太长了，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5179418/

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