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這篇文章給大家介紹利用Java怎么實現(xiàn)一個錄音功能,內(nèi)容非常詳細,感興趣的小伙伴們可以參考借鑒,希望對大家能有所幫助。
public class EngineeCore { String filePath = "E:\\voice\\voice_cache.wav"; AudioFormat audioFormat; TargetDataLine targetDataLine; boolean flag = true; private void stopRecognize() { flag = false; targetDataLine.stop(); targetDataLine.close(); }private AudioFormat getAudioFormat() { float sampleRate = 16000; // 8000,11025,16000,22050,44100 int sampleSizeInBits = 16; // 8,16 int channels = 1; // 1,2 boolean signed = true; // true,false boolean bigEndian = false; // true,false return new AudioFormat(sampleRate, sampleSizeInBits, channels, signed, bigEndian); }// end getAudioFormat private void startRecognize() { try { // 獲得指定的音頻格式 audioFormat = getAudioFormat(); DataLine.Info dataLineInfo = new DataLine.Info(TargetDataLine.class, audioFormat); targetDataLine = (TargetDataLine) AudioSystem.getLine(dataLineInfo); // Create a thread to capture the microphone // data into an audio file and start the // thread running. It will run until the // Stop button is clicked. This method // will return after starting the thread. flag = true; new CaptureThread().start(); } catch (Exception e) { e.printStackTrace(); } // end catch }// end captureAudio method class CaptureThread extends Thread { public void run() { AudioFileFormat.Type fileType = null; File audioFile = new File(filePath); fileType = AudioFileFormat.Type.WAVE; //聲音錄入的權(quán)值 int weight = 2; //判斷是否停止的計數(shù) int downSum = 0; ByteArrayInputStream bais = null; ByteArrayOutputStream baos = new ByteArrayOutputStream(); AudioInputStream ais = null; try { targetDataLine.open(audioFormat); targetDataLine.start(); byte[] fragment = new byte[1024]; ais = new AudioInputStream(targetDataLine); while (flag) { targetDataLine.read(fragment, 0, fragment.length); //當(dāng)數(shù)組末位大于weight時開始存儲字節(jié)(有聲音傳入),一旦開始不再需要判斷末位 if (Math.abs(fragment[fragment.length-1]) > weight || baos.size() > 0) { baos.write(fragment); System.out.println("守衛(wèi):"+fragment[0]+",末尾:"+fragment[fragment.length-1]+",lenght"+fragment.length); //判斷語音是否停止 if(Math.abs(fragment[fragment.length-1])<=weight){ downSum++; }else{ System.out.println("重置奇數(shù)"); downSum=0; } //計數(shù)超過20說明此段時間沒有聲音傳入(值也可更改) if(downSum>20){ System.out.println("停止錄入"); break; } } } //取得錄音輸入流 audioFormat = getAudioFormat(); byte audioData[] = baos.toByteArray(); bais = new ByteArrayInputStream(audioData); ais = new AudioInputStream(bais, audioFormat, audioData.length / audioFormat.getFrameSize()); //定義最終保存的文件名 System.out.println("開始生成語音文件"); AudioSystem.write(ais, AudioFileFormat.Type.WAVE, audioFile); downSum = 0; stopRecognize(); } catch (Exception e) { e.printStackTrace(); } finally { //關(guān)閉流 try { ais.close(); bais.close(); baos.reset(); } catch (IOException e) { e.printStackTrace(); } } }// end run }// end inner class CaptureThread
接下來測試
public static void main(String args[]) { EngineeCore engineeCore = new EngineeCore(); engineeCore.startRecognize(); }
當(dāng)有較高的聲音傳入麥克風(fēng)時,targetDataLine讀取的字節(jié)數(shù)組首位或末位絕對值會變大(位置取決于音頻格式中的一些參數(shù),如bigEndian)。傳入音量低,絕對值會變小
錄音開始。從targetDataLine中讀取的音頻數(shù)據(jù)被保存在ByteArrayOutputStream中。一段時間音量一直低于權(quán)值時,認為無聲音傳入,結(jié)束錄音。從ByteArrayOutputStream取出字節(jié)數(shù)組,
轉(zhuǎn)為音頻保存在本地文件中。
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