OpenAL iPhone：无法播放任何声音

Question

我试图通过引用this tutorial来通过OpenAL播放一个简单的声音文件：

我已经创建了一个单片代码来测试，但是无法播放声音。我一直在尝试很多东西，但我无法发挥声音。任何帮助深表感谢。 感谢。

这是我的代码：

ALCdevice* device;
device = alcOpenDevice(NULL);

ALCcontext* context;
alcCreateContext(device, NULL);
alcMakeContextCurrent(context);

NSString* path = [[NSBundle mainBundle] pathForResource:@"mg" ofType:@"caf"];
NSURL* pathURL = [NSURL fileURLWithPath:path];

AudioFileID audioID;
OSStatus audioStatus = AudioFileOpenURL((CFURLRef)pathURL, kAudioFileReadPermission, 0, &audioID);


UInt32 fileSize = 0;
UInt64 outDataSize;
UInt32 propSize = sizeof(UInt64);
OSStatus res = AudioFileGetProperty(audioID, kAudioFilePropertyAudioDataByteCount, &propSize, &outDataSize);
fileSize = (UInt32)outDataSize;

unsigned char* outData = malloc(fileSize);
OSStatus res2 = AudioFileReadBytes(audioID, false, 0, &fileSize, outData);

AudioFileClose(audioID);

ALuint bufferID;
alGenBuffers(1, &bufferID);
alBufferData(bufferID, AL_FORMAT_STEREO16, outData, fileSize, 44100);

ALuint sourceID = 2;
alGenSources(1, &sourceID);
alSourcei(sourceID, AL_BUFFER, bufferID);
alSourcef(sourceID, AL_PITCH, 1.0f);
alSourcef(sourceID, AL_GAIN, 1.0f);
alSourcei(sourceID, AL_LOOPING, AL_FALSE);
free(outData);
outData = NULL;

alSourcePlay(sourceID);

Answer 1

刚刚发现！ 我一直在使用：

alcCreateContext(device, NULL);

而不是：

context = alcCreateContext(device, NULL);

alGetError（）帮助指出了这一点。