Question

我想将AAC编码的音频数据从我的Raspberry流式传输到我的Android手机。接收数据的部分运行良好，但解码时存在一些问题。

我使用Media Extractor和Media Codec解码音频数据。以下是代码的重要部分：

MediaExtractor extractor = new MediaExtractor();
Uri path = Uri.fromFile(file);

extractor.setDataSource(path.toString());

format = extractor.getTrackFormat(0); 
    String mime = format.getString(MediaFormat.KEY_MIME); 
    decoder = MediaCodec.createDecoderByType(mime); 
    decoder.configure(format, null, null, 0); 


    while (!stopTrack) { 


        multicastSocket.receive(packet); 

        decoder.start(); 
        data = packet.getData(); 

        inputBuffers = decoder.getInputBuffers(); 
        outputBuffers = decoder.getOutputBuffers(); 
        inputBufferIndex = decoder.dequeueInputBuffer(-1); 

        if (inputBufferIndex >= 0) 
        { 
            inputBuffer = inputBuffers[inputBufferIndex]; 
            inputBuffer.clear(); 

            inputBuffer.put(data); 

            decoder.queueInputBuffer(inputBufferIndex, 0, data.length, 0, 0); 
        } 

        bufferInfo = new MediaCodec.BufferInfo(); 
        outputBufferIndex = decoder.dequeueOutputBuffer(bufferInfo, 0); 

        while (outputBufferIndex >= 0) 
        { 
            outputBuffer = outputBuffers[outputBufferIndex]; 

            outputBuffer.position(bufferInfo.offset); 
            outputBuffer.limit(bufferInfo.offset + bufferInfo.size); 

            outData = new byte[bufferInfo.size]; 
            outputBuffer.get(outData); 

            //  Log.d("AudioDecoder", outData.length + " bytes decoded"); 

           track.write(outData, 0, outData.length); 

            decoder.releaseOutputBuffer(outputBufferIndex, false); 
            outputBufferIndex = decoder.dequeueOutputBuffer(bufferInfo, 0); 

        }

这些是我在logcat中收到的错误消息：

D/ExtendedUtils: Try creating ExtendedExtractor 
E/MM_OSAL: FileSource::FileSource 
E/MM_OSAL: FileSource::FileSource m_bEveryThingOK 1 
E/MM_OSAL: MM_File_Create File Name /data/mmosal_logmask.cfg , Mode 0 
E/MM_OSAL: MM_File_Create failed .Efs Error No -1 , File Name      /data/mmosal_logmask.cfg , Mode 0 
E/MM_OSAL: Open or read fail on /data/mmosal_logmask.cfg. Possible permission denied issue. Looking for /data/misc/media/mmosal_logmask.cfg 
E/MM_OSAL: MM_File_Create File Name /data/misc/media/mmosal_logmask.cfg , Mode 0  
E/MM_OSAL: MM_File_Create failed .Efs Error No -1 , File Name /data/misc/media/mmosal_logmask.cfg , Mode 0 
E/MMParserExtractor:  FileSourceWrapper::New returned NULL 
D/ExtendedUtils: default extractor is NULL, return extended extractor 
E/MM_OSAL: FileSource::FileSource 
E/MM_OSAL: FileSource::FileSource m_bEveryThingOK 1 
E/MM_OSAL: MM_File_Create File Name /data/mmosal_logmask.cfg , Mode 0 
E/MM_OSAL: MM_File_Create failed .Efs Error No -1 , File Name /data/mmosal_logmask.cfg , Mode 0 
E/MM_OSAL: Open or read fail on /data/mmosal_logmask.cfg. Possible permission denied issue. Looking for /data/misc/media/mmosal_logmask.cfg 
E/MM_OSAL: MM_File_Create File Name /data/misc/media/mmosal_logmask.cfg , Mode 0 
E/MM_OSAL: MM_File_Create failed .Efs Error No -1 , File Name /data/misc/media/mmosal_logmask.cfg , Mode 0 
E/MM_OSAL: parseTransportStreamPacket isPESPacket failed 18954 
E/MM_OSAL: parseTransportStreamPacket isPESPacket failed 18783 
E/MM_OSAL: parseTransportStreamPacket isPESPacket failed 18954 
E/MM_OSAL: parseTransportStreamPacket isPESPacket failed 18783 
I/OMXClient: Using client-side OMX mux. 
E/OMXMaster: A component of name 'OMX.qcom.audio.decoder.aac' already exists, ignoring this one. 
D/MediaCodec: MediaCodec[kWhatConfigure]: video-output-protection: 00000000, audio-output-protection: 00000000 
E/Format:: audio/mp4a-latm 
W/SoftAAC2: aacDecoder_DecodeFrame decoderErr = 0x4004 
W/SoftAAC2: AAC decoder returned error 0x4004, substituting silence 
I/SoftAAC2: Reconfiguring decoder: 0->44100 Hz, 0->0 channels

什么是MM_OSAL？为什么要在＆＃34; / data＆＃34;中创建文件？我手机上的文件夹？我搜索了它，发现你需要root权限才能访问这个文件夹。我用android studio直接用我的手机通过USB调试应用程序，这是一个问题吗？

感谢您的帮助！

Android应用程序希望访问＆＃34; /数据＆＃34;夹

0 个答案: