Java中PCM转WAV怎么返回文件开头加文件头呢？

Question

是用socket接收数据，需要在开头加上WAV文件头。我用了BufferedReader中的    reset 方法但是并不能返回文件开头，请问什么问题呢？            mAudioFile = new File(filePath + time + ".wav");
            mAudioFile.getParentFile().mkdirs();
            mAudioFile.createNewFile();
            fos = new FileOutputStream(mAudioFile);
            socket = new DatagramSocket(9003);
            buffer = new byte[320];
            DatagramPacket packet = new DatagramPacket(buffer, buffer.length);            BufferedReader reader;
            reader = new BufferedReader(new FileReader(mAudioFile));
            reader.((int)mAudioFile.length()+1);            while (mIsRecording) {
                socket.setSoTimeout(1000);//等待1s 无数据则提示错误
                socket.receive(packet);
                //将录制的音频数据存储到本地
                fos.write(buffer, 0, buffer.length);
                fos.flush();
            }
               /**
             * 加WAV头文件
             */
            FileInputStream in;
            in = new FileInputStream(mAudioFile);
            totalAudioLen = in.getChannel().size();
            //由于不包括RIFF和WAV
            totalDataLen = totalAudioLen + 36;
            reader.reset();
            writeWaveFileHeader(fos, totalAudioLen, totalDataLen, longSampleRate, channels, byteRate);

Answer 1

mAudioFile = new File(filePath + time + ".wav");
            mAudioFile.getParentFile().mkdirs();
            mAudioFile.createNewFile();
            fos = new FileOutputStream(mAudioFile);
            socket = new DatagramSocket(9003);
            buffer = new byte[320];
            DatagramPacket packet = new DatagramPacket(buffer, buffer.length);            BufferedReader reader;
            reader = new BufferedReader(new FileReader(mAudioFile));
            reader.((int)mAudioFile.length()+1);            while (mIsRecording) {
                socket.setSoTimeout(1000);//等待1s 无数据则提示错误
                socket.receive(packet);
                //将录制的音频数据存储到本地
                fos.write(buffer, 0, buffer.length);
                fos.flush();
            }
               /**
             * 加WAV头文件
             */
            FileInputStream in;
            in = new FileInputStream(mAudioFile);
            totalAudioLen = in.getChannel().size();
            //由于不包括RIFF和WAV
            totalDataLen = totalAudioLen + 36;
            reader.reset();
            writeWaveFileHeader(fos, totalAudioLen, totalDataLen, longSampleRate, channels, byteRate);