ios - ios 的 Icecast 源码客户端

Question

我一直在尝试为 ios 的 ice cast 创建一个源客户端。我已经能够使用 asyncsocket 连接到套接字。我还可以将数据写入服务器。 icecast 配置是针对 mp3 格式完成的。但是写入服务器的 mp3 文件已损坏。我提供了一些代码片段。

标题:

 NSString *string = @"SOURCE /sync HTTP/1.0\r\n"
        "Authorization: Basic c291cmNlOmhhY2ttZQ==\r\n"
        "User-Agent: butt-0.1.12\r\n"
        "User-Agent: butt-0.1.12\r\n"
        "content-type: audio/mpeg\r\n"
        "ice-name:  sync's Stream\r\n"
        "ice-public: 0\r\n"
        "ice-genre: Rock\r\n"
        "ice-description: This is my server description\r\n"
        "Connection: keep-alive\r\n"
        "ice-audio-info: ice-samplerate=44100;ice-bitrate=48;ice-channels=2\r\n\r\n";

     NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];

    //sending http request to write the header
    NSLog(@"Sending HTTP Request.");
    [socket writeData:data withTimeout:-1 tag:1];

    //write buffer data to server
    [socket writeData:self.dataBuffer withTimeout:-1 tag:1];

为了录制，我正在使用 aqrecorder 使用以下代码进行录制。

void AQRecorder::MyInputBufferHandler(  void *                              inUserData,
                                        AudioQueueRef                       inAQ,
                                        AudioQueueBufferRef                 inBuffer,
                                        const AudioTimeStamp *              inStartTime,
                                        UInt32                              inNumPackets,
                                        const AudioStreamPacketDescription* inPacketDesc)
{
    AQRecorder *aqr = (AQRecorder *)inUserData;
    try {
        if (inNumPackets > 0) {
            // write packets to file
            XThrowIfError(AudioFileWritePackets(aqr->mRecordFile, FALSE, inBuffer->mAudioDataByteSize,
                                             inPacketDesc, aqr->mRecordPacket, &inNumPackets, inBuffer->mAudioData),
                       "AudioFileWritePackets failed");
            aqr->mRecordPacket += inNumPackets;

           NSLog(@"size = %u",(unsigned int)inBuffer->mAudioDataByteSize);

            data = [[[NSData alloc]initWithBytes:inBuffer->mAudioData length:inBuffer->mAudioDataByteSize]retain];

            server *srv = [[server alloc]init];
            srv.dataBuffer=data;
            [srv connecting];

        }

        // if we're not stopping, re-enqueue the buffe so that it gets filled again
        if (aqr->IsRunning())
            XThrowIfError(AudioQueueEnqueueBuffer(inAQ, inBuffer, 0, NULL), "AudioQueueEnqueueBuffer failed");
    } catch (CAXException e) {
        char buf[256];
        fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
    }
}



void AQRecorder::StartRecord(CFStringRef inRecordFile)
{
//    server *srv=[[server alloc]init];
//    [srv connecting];

    int i, bufferByteSize;
    UInt32 size;
    CFURLRef url = nil;

    try {       
        mFileName = CFStringCreateCopy(kCFAllocatorDefault, inRecordFile);

//      // specify the recording format
//      SetupAudioFormat(kAudioFormatMPEG4AAC);

        // specify the recording format, use hardware AAC if available
        // otherwise use IMA4
        if(IsAACHardwareEncoderAvailable())
            SetupAudioFormat(kAudioFormatMPEG4AAC);
        else
            SetupAudioFormat(kAudioFormatAppleIMA4);

        // create the queue
        XThrowIfError(AudioQueueNewInput(
                                      &mRecordFormat,
                                      MyInputBufferHandler,
                                      this /* userData */,
                                      NULL /* run loop */, NULL /* run loop mode */,
                                      0 /* flags */, &mQueue), "AudioQueueNewInput failed");

        // get the record format back from the queue's audio converter --
        // the file may require a more specific stream description than was necessary to create the encoder.
        mRecordPacket = 0;

        size = sizeof(mRecordFormat);
        XThrowIfError(AudioQueueGetProperty(mQueue, kAudioQueueProperty_StreamDescription,  
                                         &mRecordFormat, &size), "couldn't get queue's format");

        NSString *recordFile = [NSTemporaryDirectory() stringByAppendingPathComponent: (NSString*)inRecordFile];    

        //url = CFURLCreateWithString(kCFAllocatorDefault, (CFStringRef)recordFile, NULL);
        url = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, (CFStringRef)recordFile, kCFURLPOSIXPathStyle, false);
        // create the audio file
        OSStatus status = AudioFileCreateWithURL(url, kAudioFileCAFType, &mRecordFormat, kAudioFileFlags_EraseFile, &mRecordFile);
        CFRelease(url);

        XThrowIfError(status, "AudioFileCreateWithURL failed");

        // copy the cookie first to give the file object as much info as we can about the data going in
        // not necessary for pcm, but required for some compressed audio
        CopyEncoderCookieToFile();

        // allocate and enqueue buffers
        bufferByteSize = ComputeRecordBufferSize(&mRecordFormat, kBufferDurationSeconds);   // enough bytes for half a second
        for (i = 0; i < kNumberRecordBuffers; ++i) {
            XThrowIfError(AudioQueueAllocateBuffer(mQueue, bufferByteSize, &mBuffers[i]),
                       "AudioQueueAllocateBuffer failed");
            XThrowIfError(AudioQueueEnqueueBuffer(mQueue, mBuffers[i], 0, NULL),
                       "AudioQueueEnqueueBuffer failed");
        }
        // start the queue
        mIsRunning = true;
        XThrowIfError(AudioQueueStart(mQueue, NULL), "AudioQueueStart failed");
    }
    catch (CAXException e) {
        char buf[256];
        fprintf(stderr, "Error: %s (%s)\n", e.mOperation, e.FormatError(buf));
    }
    catch (...) {
        fprintf(stderr, "An unknown error occurred\n");;
    }   

}

我需要更改格式才能写入服务器吗？

Answer 1

您发送的不是 MP3 数据，而是 AAC 或 M4A 数据。我不相信 Icecast 支持 M4A。您实际上使用的是 Icecast 还是其他服务器？

对于 AAC，您的 Content-Type header 是错误的。尝试 audio/aac、audio/aacp、audio/mp4 或 audio/mpeg4-generic。

此外，您只需要一个 User-Agent header ，并且您应该选择与您正在编写的软件相匹配的 header ，而不是复制别人的 header 。将来，您的代码可能需要调整协议(protocol)，并且只有在您使用自己的用户代理字符串时才有可能。