二接着谈谈amr的录制和播放

如果是pc的话建议录制成wav文件然后转换成amr,手机可不能这么搞，文件太大了转换也麻烦，所以应该直接录制成amr。

Java手机的录制和播放：J2ME (MIDP 2.0, CLDC 1.0)

http://www.hcilab.org/documents/tutorials/AudioTest/

录制：

        Player player;

        ...

         player=Manager.createPlayer(“capture://audio?encoding=amr”);

         player.realize();

       RecordControl rc = (RecordControl)player.getControl("RecordControl");
 

       ByteArrayOutputStream output = new ByteArrayOutputStream();
 

       rc.setRecordStream(output);
 

       rc.startRecord();
 

       player.start();
 

       Thread.currentThread().sleep(5000);

        rc.commit();

播放：

       ByteArrayInputStream recordedInputStream = new ByteArrayInputStream(recordedSoundArray);

        Player p2 = Manager.createPlayer(recordedInputStream,"audio/x-wav");

        p2.prefetch();

        p2.start();

 
 
Symbian手机的录制和播放:

主要是CMdaAudioRecorderUtility的使用方法的问题。

播放：

 TFileName tFullFileName = GetFullFileName(aBarFileName);
 iCurrentFileName=tFullFileName;
 RLog::Log(aBarFileName); 
 RLog::Log(tFullFileName);
 
#ifdef __WINS__ 
  TRAPD(err,
  iMdaAudioRecorderUtility->OpenFileL(
    tFullFileName,
    KMMFExControllerUID,
    KMMFExControllerUID,
    KMMFExDesFormatUID,
    KMMFFourCCCodeAMR
  ));
#else
 TRAPD(err,
 iMdaAudioRecorderUtility->OpenFileL(
  tFullFileName
  ));
#endif
 if(err) 
 {
  RLog::Log(_L("OpenFile err"),err);
  User::Leave(err);  
 }

  CMdaAudioRecorderUtility* iMdaAudioRecorderUtility;
iMdaAudioRecorderUtility= new ...

iMdaAudioRecorderUtility= new ...

 iMdaAudioRecorderUtility->SetAudioDeviceMode(CMdaAudioRecorderUtility::ELocal);
 
    // Set maximum volume for playback
    iMdaAudioRecorderUtility->SetVolume(iMdaAudioRecorderUtility->MaxVolume());
 
    // Set the playback position to the start of the file
    iMdaAudioRecorderUtility->SetPosition(TTimeIntervalMicroSeconds(0));
 
 TRAPD(errp,iMdaAudioRecorderUtility->PlayL());
 if(errp)
 {
  RLog::Log(_L("Play"),errp);
 }

录制：

 if(iMdaAudioRecorderUtility->State()==CMdaAudioClipUtility::ERecording
  ||iMdaAudioRecorderUtility->State()==CMdaAudioClipUtility::EPlaying)
  return;
 RLog::Log(_L("RecordL 1"));
 if(iMdaAudioRecorderUtility->State()==CMdaAudioClipUtility::EOpen)
  iMdaAudioRecorderUtility->Close();
 //TPtrC aFileName(KRecorderFile);
 TRAPD(errc,this->CleanAmrFileL(aBarFileName));
 if(errc)
 {
  RLog::Log(_L("CleanAmrFileL:"),errc);
  User::Leave(errc);
 }
 else{
  RLog::Log(_L("CleanAmrFileL:OK"));
 }
 TRAPD(erro,this->OpenRecordFileL(aBarFileName));
 if(erro)
 {
  RLog::Log(_L("OpenRecordFile:"),erro);
  User::Leave(erro);
 }
 else{
  RLog::Log(_L("OpenRfileOK"));
 }
 // Record from the device microphone
    iMdaAudioRecorderUtility->SetAudioDeviceMode(CMdaAudioRecorderUtility::ELocal);
 
    // Set maximum gain for recording
    iMdaAudioRecorderUtility->SetGain(iMdaAudioRecorderUtility->MaxGain());
   
    // Delete current audio sample from beginning of file
    iMdaAudioRecorderUtility->SetPosition(TTimeIntervalMicroSeconds(0));
    //iMdaAudioRecorderUtility->CropL();
 
    TRAPD(err,iMdaAudioRecorderUtility->RecordL());
 if(err){
  RLog::Log(_L("RecordL Err"),err);
 }
 //iEngineStatus=ERECORDING;

      未完待续