相关疑难解决方法(0)

我想将两个或多个.wav文件合并为一个,然后将其转换为.mp3,我想在Swift中完成(或者至少可以选择将它包含在swift项目中).

在swift中合并两个.wav文件不是问题.这是我的例子现在我不知道如何将lame库添加到swift项目以及如何使用它(如何更改客观的蹩脚代码使用语法以在swift中使用它).

我坚持使用swift,所以我尝试了使用Objective C的Lame库.我找到了将.caf转换为.mp3的示例代码,所以我试了一下.这是我尝试过的:

- (void) toMp3
{
    NSString *cafFilePath = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"caf"];

    NSString *mp3FileName = @"Mp3File";
    mp3FileName = [mp3FileName stringByAppendingString:@".mp3"];
    NSString *mp3FilePath = [[NSHomeDirectory() stringByAppendingFormat:@"/Documents/"] stringByAppendingPathComponent:mp3FileName];

    NSLog(@"%@", mp3FilePath);

    @try {
        int read, write;

        FILE *pcm = fopen([cafFilePath cStringUsingEncoding:1], "rb");  //source
        fseek(pcm, 4*1024, SEEK_CUR);                                   //skip file header
        FILE *mp3 = fopen([mp3FilePath cStringUsingEncoding:1], "wb");  //output

        const int PCM_SIZE = 8192;
        const int MP3_SIZE = 8192;
        short int pcm_buffer[PCM_SIZE*2];
        unsigned char mp3_buffer[MP3_SIZE];

        lame_t lame = lame_init();
        lame_set_in_samplerate(lame, 44100); …

我正在尝试使用这篇文章中的答案将给定的 .m4a 格式音频文件转换为 .aiff 格式。我已将代码转换为 Swift 3.0。

func convertAudio(_ url: URL, outputURL: URL) {
    var error : OSStatus = noErr
    var destinationFile : ExtAudioFileRef? = nil
    var sourceFile : ExtAudioFileRef? = nil

    var srcFormat : AudioStreamBasicDescription = AudioStreamBasicDescription()
    var dstFormat : AudioStreamBasicDescription = AudioStreamBasicDescription()

    var audioConverter : AudioConverterRef? = nil

    ExtAudioFileOpenURL(url as CFURL, &sourceFile)

    var thePropertySize: UInt32 = UInt32(MemoryLayout.stride(ofValue: srcFormat))

    ExtAudioFileGetProperty(sourceFile!, kExtAudioFileProperty_FileDataFormat, &thePropertySize, &srcFormat)

    dstFormat.mSampleRate = 44100  //Set sample rate
    dstFormat.mFormatID = kAudioFormatLinearPCM
    dstFormat.mChannelsPerFrame = 1
    dstFormat.mBitsPerChannel = 16 …