无法播放wav文件...在Android中。

时间:2013-03-02 06:03:54

标签: java android android-mediarecorder

我正在尝试在Android中添加两个wav文件。因为我将两个文件读取到2个字节数组(A& B)。我将它们两个组合到一个新数组(C)。我写了内容第三个数组C到一个新的.wav输出文件。我也把wav头文件。我得到大小的输出文件(C = A + B)。但是播放器无法播放该输出文件。

如果第二个输入文件(B)没有读取到字节数组(这里我初始化B。但是没有将第二个文件的内容写入字节数组,B),那么我可以播放输出文件,这里是第一个文件完全播放但播放器静音后(代替第二档)..

我使用了以下代码片段:请帮助解决此问题

File firstFile=new File("path1.wav");
        File secondFile=new File("path2.wav");

        int size1=(int)firstFile.length();
        int size2=(int)secondFile.length();

        Log.i("Size1::"+size1,"Size2::"+size2);

        dataOne=new byte[size1];
        dataTwo=new byte[size2];




        newData=new byte[dataOne.length+dataTwo.length];


        try 
        {
            in1=new DataInputStream(new BufferedInputStream(new FileInputStream(firstFile)));
            in2=new DataInputStream(new BufferedInputStream(new FileInputStream(secondFile)));


            in1.readFully(dataOne);
            in1.close();
            in2.read(dataTwo);
            in2.close();

            int j;
            for(j=0;j<dataOne.length;j++)
                newData[j]=dataOne[j];
            for(int m=0;m<dataTwo.length;m++)
                newData[j+m]=dataTwo[j];




        } catch (FileNotFoundException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


        try 
        {
            fWriter = new FileOutputStream("outputPath.wav");


            WAVE(fWriter);

            //fWriter.write(newData,0,newData.length);

        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

我使用以下两种方法创建wav标头

public void WAVE(FileOutputStream fWriter)
{

    try 
    {
        //0------------3
        fWriter.write('R');
        fWriter.write('I');
        fWriter.write('F');
        fWriter.write('F');


        //4------7

        byte[] res=new byte[4];

        int sizeOfFile=newData.length-8;
        res=toBytes(sizeOfFile);
        for(int j=0;j<4;j++)
            Log.i(""+j,""+res[j]);
        fWriter.write(res,0,4);




        //8-15
        fWriter.write('W');
        fWriter.write('A');
        fWriter.write('V');
        fWriter.write('E');
        fWriter.write('f');
        fWriter.write('m');
        fWriter.write('t');
        fWriter.write(' ');

        //16----19
         res=new byte[4];
        res=toBytes(16);
        for(int j=0;j<4;j++)
            Log.i(""+j,""+res[j]);
        fWriter.write(res,0,4);


        //20---21
        res=toBytes(1);
        for(int j=0;j<2;j++)
            Log.i("PCM"+j,""+res[j]);
        fWriter.write(res,0,2);

        //22---23
        res=toBytes(2);
        for(int j=0;j<2;j++)
            Log.i("NOC:MONO/STEREO"+j,""+res[j]);
        fWriter.write(res,0,2);

        //24--27
        int ASR=Integer.parseInt(44100);  
        res=toBytes(ASR);
        for(int j=0;j<4;j++)
            Log.i(ASR+"ASR"+j,""+res[j]);
        fWriter.write(res,0,4);

        //28--31 Bytes Per Second

        int Number_of_channels=2;
        int Samples_per_second=ASR;
        int Bits_per_Sample=32;
        int BPS=Number_of_channels*Samples_per_second*Bits_per_Sample/8;
                Integer.parseInt(audioSamplingRate);
        res=toBytes(BPS);
        for(int j=0;j<4;j++)
            Log.i(ASR+"BPS"+j,""+res[j]);
        fWriter.write(res,0,4);


        //32--33 Block Alignment

        int BA= Number_of_channels*Bits_per_Sample/8;

        res=toBytes(BA);
        for(int j=0;j<2;j++)
            Log.i("Block Alignment"+j,""+res[j]);
        fWriter.write(res,0,2);

        //34---35  Bits Per Sample

        res=toBytes(Bits_per_Sample);
        for(int j=0;j<2;j++)
            Log.i(ASR+"Bits Per Sample"+j,""+res[j]);
        fWriter.write(res,0,2);


        //36---39 "data"
        fWriter.write('d');
        fWriter.write('a');
        fWriter.write('t');
        fWriter.write('a');

        //40----43 length of data
        res=toBytes(newData.length);
        for(int j=0;j<4;j++)
            Log.i("Data Size"+j,""+res[j]);
        fWriter.write(res,0,4);

        fWriter.write(newData);

        fWriter.close();
    } 
    catch (IOException e) 
    {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}
 public byte[] toBytes(int i)
{
  byte[] result = new byte[4];

  result[0] = (byte) (i >> 24);
  result[1] = (byte) (i >> 16);
  result[2] = (byte) (i >> 8);
  result[3] = (byte) (i /*>> 0*/);

  return result;
}

我使用API​​ 8(2.2 Froyo)

0 个答案:

没有答案