如何获得音频幅度与语音识别？ [英] How to get audio amplitude with speech recognizer?
问题描述
我想创建一个自定义对话框，而语音识别，而不是使用官方之一。我得到的一部分，但是当后来我决定以示同时也认识到声音的振幅，从而使其更花哨，像谷歌现在的搜索栏做（它的一个圆，如果是成长麦克风的周围声音的响亮）：
I'm trying to make a custom dialog while speech recognizing instead of using the official one. I got that part, but when then I decided to show the amplitude of the sound while recognizing, in order to make it more fancy, like Google Now search bar does (its a circle around the microphone that grows if voice its louder):
然后，我开始code如何获取声音的振幅，最后我得到了它与AudioRecord类。
Then I started to code how to obtain the amplitude of the sound, and finally I got it with AudioRecord Class.
的问题是当我尝试混合两者（SpeechRecognizer和AudioRecord），因为好像他们不能够共享麦克风或类似的东西...
The problem comes when I try to mix both (SpeechRecognizer and AudioRecord), because seems like they are not able to share microphone, or something like that...
在logcat中我有这样的错误：
In logcat I have this error:
03-03 21:16:07.461: E/ListenerAdapter(23359): onError
03-03 21:16:07.461: E/ListenerAdapter(23359): com.google.android.speech.embedded.Greco3RecognitionEngine$EmbeddedRecognizerUnavailableException: Embedded recognizer unavailable
03-03 21:16:07.461: E/ListenerAdapter(23359): at com.google.android.speech.embedded.Greco3RecognitionEngine.startRecognition(Greco3RecognitionEngine.java:108)
03-03 21:16:07.461: E/ListenerAdapter(23359): at java.lang.reflect.Method.invokeNative(Native Method)
03-03 21:16:07.461: E/ListenerAdapter(23359): at java.lang.reflect.Method.invoke(Method.java:511)
03-03 21:16:07.461: E/ListenerAdapter(23359): at com.google.android.searchcommon.utils.ThreadChanger$1$1.run(ThreadChanger.java:77)
03-03 21:16:07.461: E/ListenerAdapter(23359): at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:390)
03-03 21:16:07.461: E/ListenerAdapter(23359): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
03-03 21:16:07.461: E/ListenerAdapter(23359): at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:153)
03-03 21:16:07.461: E/ListenerAdapter(23359): at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:267)
03-03 21:16:07.461: E/ListenerAdapter(23359): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
03-03 21:16:07.461: E/ListenerAdapter(23359): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
03-03 21:16:07.461: E/ListenerAdapter(23359): at com.google.android.searchcommon.utils.ConcurrentUtils$2$1.run(ConcurrentUtils.java:112)
和其他一些时候，我有这样的：
and some other times i have this:
03-03 21:47:13.344: E/ListenerAdapter(23359): onError
03-03 21:47:13.344: E/ListenerAdapter(23359): com.google.android.speech.exception.AudioRecognizeException: Audio error
03-03 21:47:13.344: E/ListenerAdapter(23359): at com.google.android.speech.embedded.Greco3Recognizer.read(Greco3Recognizer.java:107)
03-03 21:47:13.344: E/ListenerAdapter(23359): at dalvik.system.NativeStart.run(Native Method)
03-03 21:47:13.344: E/ListenerAdapter(23359): Caused by: java.io.IOException: couldn't start recording, state is:1
03-03 21:47:13.344: E/ListenerAdapter(23359): at com.google.android.speech.audio.MicrophoneInputStream.ensureStartedLocked(MicrophoneInputStream.java:119)
03-03 21:47:13.344: E/ListenerAdapter(23359): at com.google.android.speech.audio.MicrophoneInputStream.read(MicrophoneInputStream.java:159)
03-03 21:47:13.344: E/ListenerAdapter(23359): at com.google.common.io.ByteStreams.read(ByteStreams.java:806)
03-03 21:47:13.344: E/ListenerAdapter(23359): at com.google.android.speech.audio.Tee.readFromDelegate(Tee.java:374)
03-03 21:47:13.344: E/ListenerAdapter(23359): at com.google.android.speech.audio.Tee.readLeader(Tee.java:267)
03-03 21:47:13.344: E/ListenerAdapter(23359): at com.google.android.speech.audio.Tee$TeeLeaderInputStream.read(Tee.java:464)
03-03 21:47:13.344: E/ListenerAdapter(23359): at java.io.InputStream.read(InputStream.java:163)
03-03 21:47:13.344: E/ListenerAdapter(23359): at com.google.android.speech.audio.AudioSource$CaptureThread.run(AudioSource.java:193)
这是我如何启动这两个：
And this is how i launch both:
//previously in constructor
speechrec = SpeechRecognizer.createSpeechRecognizer(getActivity());
speechrec.setRecognitionListener(this);
//
public void launchListening()
{
if (speechrec.isRecognitionAvailable(getActivity()))
{
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
speechrec.startListening(intent);
}
bufferSize = AudioRecord.getMinBufferSize(sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);// * bufferSizeFactor;
audio = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);
audio.startRecording();
captureThread = new Thread(new Runnable()
{
public void run()
{
//calculate amplitude here
}
});
captureThread.start();
}
任何关于如何创建语音识别，在那里我可以显示基于噪声振幅自定义对话框的想法，像谷歌呢？
Any ideas on how creating a custom dialog for speech recognition, where I can show amplitude based on the noise, like Google does?
推荐答案
做到这一点的方法是注册一个监听器的 SpeechRecognizer 和可视化的输出<一个href="http://developer.android.com/reference/android/speech/RecognitionListener.html#onRmsChanged%28float%29"相对=nofollow> onRmsChanged 。然而，需要注意的是：
The way to do it is to register a listener with the SpeechRecognizer and visualize the output of onRmsChanged. Note however that:
没有保证，这种方法将被调用。
There is no guarantee that this method will be called.
所以，你正在使用的需求，以支持此方法的语音识别。需要注意的是返回值 SpeechRecognizer.createSpeechRecognizer（getActivity（））取决于用户的设备的配置。
So the speech recognizer that you are using needs to support this method. Note that the return value of SpeechRecognizer.createSpeechRecognizer(getActivity()) depends on the user's device's configuration.
（不能启动 AudioRecord ，而 SpeechRecognizer 正在录制，反之亦然。）
(You cannot start an AudioRecord while the SpeechRecognizer is recording and vice versa.)
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