我已经尝试了以下代码,但是在执行时会给出“fmt?”错误,告诉我“此文件类型不支持数据格式”。不幸的是,我在任何地方都找不到引用来解释如果要写入AIFF应该如何设置AudioStreamBasicDescription。
我已经搜索了这个问题,并阅读了所有可以找到的文档,但无济于事。有人做过这种事吗?有什么想法我做错了吗?
// This path is just for testing
char * filePath = "/Users/user/Desktop/reverb.aiff";
// This value will actually be set by earlier code depending on how many mics are defined
int channels = 1;
CFURLRef audioFileURL = CFURLCreateFromFileSystemRepresentation(NULL,
(const UInt8 *)filePath,
strlen(filePath),
false);
AudioStreamBasicDescription audioFileDescription = {0};
audioFileDescription.mFormatID = kAudioFormatLinearPCM;
audioFileDescription.mFormatFlags = kLinearPCMFormatFlagIsFloat | kLinearPCMFormatFlagIsBigEndian;
audioFileDescription.mBitsPerChannel = sizeof(float) * 8;
audioFileDescription.mChannelsPerFrame = channels;
audioFileDescription.mBytesPerFrame = (audioFileDescription.mBitsPerChannel / 8) * audioFileDescription.mChannelsPerFrame;
audioFileDescription.mFramesPerPacket = 1;
audioFileDescription.mBytesPerPacket = audioFileDescription.mBytesPerFrame * audioFileDescription.mFramesPerPacket;
AudioFileID audioFileID = 0;
OSStatus createFileStatus = AudioFileCreateWithURL(audioFileURL,
kAudioFileAIFFType,
&audioFileDescription,
kAudioFileFlags_EraseFile,
&audioFileID);
if (createFileStatus != 0) {
cout << "Error creating output file" << endl;
cout << "Error code: " << createFileStatus << ", ";
// hacky way of converting number back to kinda-readable enum code
char chars[5];
for (int i = 3; i >= 0; i--) {
chars[i] = (char)createFileStatus;
createFileStatus = createFileStatus >> 8;
}
char[4] = '\0';
cout << chars << endl;
return 1;
}
最佳答案
AIFF类型不支持 float 数据,您需要创建一个AIFF-C文件。因此,当您调用AudioFileCreateWithURL
时,您将使用kAudioFileAIFCType
。
Big Endian和float相互不兼容,请不要指定bigEndian。
关于c++ - 如何使用coreAudio将标准化浮点值数组写入AIFF?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/12159418/