清除OpenAL以加載新聲音

Question

我正在將一組100+聲音加載到OpenAL緩衝區中。過了一段時間，我正在清除OpenAL上下文並重新加載另一組聲音。但新加載的文件沒有播放。看起來以前的OpenAL緩衝區並未真正釋放。

這裏是我的初始化和銷燬​​OpenAL的

- (void)initOpenAL 
{ 
    // Initialization 
    mDevice = alcOpenDevice(NULL); // select the 「preferred device」 
    if (mDevice) { 
     // use the device to make a context 
     mContext=alcCreateContext(mDevice,NULL); 
     // set my context to the currently active one 
     alcMakeContextCurrent(mContext); 
    } 
} 

- (void)cleanUpOpenAL 
{ 
    // delete the sources 
    for (NSNumber * sourceNumber in [soundDictionary allValues]) 
    { 
     NSUInteger sourceID = [sourceNumber unsignedIntegerValue]; 
     alDeleteSources(1, &sourceID); 
    } 

    [soundDictionary removeAllObjects]; 

    // delete the buffers 
    for (NSNumber * bufferNumber in bufferStorageArray) 
    { 
     NSUInteger bufferID = [bufferNumber unsignedIntegerValue]; 
     alDeleteBuffers(1, &bufferID); 
    } 

    [bufferStorageArray removeAllObjects]; 

    // destroy the context 
    alcDestroyContext(mContext); 
    // close the device 
    alcCloseDevice(mDevice); 
} 

這是我如何加載聲音的循環內代碼：

NSString *filePath = [[NSBundle mainBundle] pathForResource:subString ofType:@"wav"]; 
     AudioFileID fileID = [self openAudioFile:filePath]; 

     // find out how big the actual audio data is 
     UInt32 fileSize = (UInt32)[self audioFileSize:fileID]; 

     // this is where the audio data will live for the moment 
     unsigned char * outData = malloc(fileSize); 

     // this where we actually get the bytes from the file and put them 
     // into the data buffer 
     OSStatus result = noErr; 
     result = AudioFileReadBytes(fileID, false, 0, &fileSize, outData); 

     if (result != 0) NSLog(@"cannot load effect: %@",fileName); 

     NSUInteger bufferID; 
     // grab a buffer ID from openAL 
     alGenBuffers(1, &bufferID); 
     if((alGetError()) != AL_NO_ERROR) { 
      printf("Error!"); 
     } 

     // jam the audio data into the new buffer 
     alBufferData(bufferID,AL_FORMAT_STEREO16,outData,fileSize,44100); 
     if((alGetError()) != AL_NO_ERROR) { 
      printf("Error!"); 
     } 

     // clean up the buffer 
     if (outData) 
     { 
      free(outData); 
     } 
     else 
     { 
      outData = NULL; 
     } 

     // save the buffer so I can release it later 
     [bufferStorageArray addObject:[NSNumber numberWithUnsignedInteger:bufferID]]; 

     NSUInteger sourceID; 

     // grab a source ID from openAL 
     alGenSources(1, &sourceID); 

     // attach the buffer to the source 
     alSourcei(sourceID, AL_BUFFER, bufferID); 

     // store this for future use 
     [soundDictionary setObject:[NSNumber numberWithUnsignedInt:sourceID] forKey: [NSNumber numberWithUnsignedInt:i+(padNumber*10)]]; 

     subString = NULL; 
     filePath = NULL; 

這是我重裝之前我在做什麼一套新的聲音：

[self cleanUpOpenAL]; 
[self initOpenAL]; 

任何想法，事情會出錯？

Answer 1

經過近一週的分析，我發現了這個錯誤。問題是我沒有關閉AudioFile。在我使用fileID之後添加了這段代碼後，所有內容都運行正常。

AudioFileClose(fileID);