Android audiorecord 实例失败

发布于 2024-12-17 09:56:28 字数 2405 浏览 0 评论 0原文

我正在创建一个应用程序来检测通过麦克风播放的声音的频率。分析是在 AsyncTask 中完成的。当我尝试一个音符时它就起作用了。

然而，当我尝试分析 6 个音符时，例如来自不同吉他弦的 6 个音符，一个接着一个（中间有一秒左右的延迟），它可能只捕获了另一个音符。

这是我得到的一些 LogCat 输出：

11-22 19:50:04.333: ERROR/AudioHardwareMSM72XX(1296): [doRouting]sndDevice=0,mCurSndDevice=-1
11-22 19:50:04.333: ERROR/AudioHardwareMSM72XX(1296): [SKW]do_route_audio_rpc(0, 1, 0)
11-22 19:50:04.333: ERROR/AudioHardwareMSM72XX(1296): msm72xx_enable_audpp: 0x0000
11-22 19:50:04.333: ERROR/AudioHardwareMSM72XX(1296): [doRouting]sndDevice=0,mCurSndDevice=0
11-22 19:50:30.523: ERROR/AudioHardwareMSM72XX(1296): Cannot open /dev/msm_pcm_in errno: 16
11-22 19:50:30.533: ERROR/AudioRecord(23241): Could not get audio input for record source 1
11-22 19:50:30.533: ERROR/AudioRecord-JNI(23241): Error creating AudioRecord instance: initialization check failed.
11-22 19:50:30.533: ERROR/AudioRecord-Java(23241): [ android.media.AudioRecord ] Error code -20 when initializing native AudioRecord object.

我为大家删除了所有重复内容。

这是我的课的要点：

static AudioRecord recorder;
static short[] audioData;
static int bufferSize;
static int samplerate = 8000;         
static boolean recorded = false;

@Override
protected Integer doInBackground(params) {

bufferSize= AudioRecord.getMinBufferSize(samplerate,AudioFormat.CHANNEL_CONFIGURATION_MONO,
            AudioFormat.ENCODING_PCM_16BIT)*2; 

recorder = new AudioRecord (AudioSource.MIC,samplerate,AudioFormat.CHANNEL_CONFIGURATION_MONO,
            AudioFormat.ENCODING_PCM_16BIT,bufferSize); 

    audioData = new short [bufferSize]; //short array that pcm data is put into.

    int recordingLoops = 0;
    while (recordingLoops < 4 || recorded) {  //loop until recording is running

    if (recorder.getState()==android.media.AudioRecord.STATE_INITIALIZED)
        if(recorder.getRecordingState()==android.media.AudioRecord.RECORDSTATE_STOPPED)
              recorder.startRecording();                     
        else {         
           recorder.read(audioData,0,bufferSize); 

           getFrequencyFromAudiodata(audioData);

           recorded = true;
             }        
    recordingLoops++;  
}

    if (recorder.getState()==android.media.AudioRecord.RECORDSTATE_RECORDING) 
    {
        killRecorder();
    }

    return 1;
}

你们知道发生了什么吗？我环顾四周，但似乎只是遇到了一些人说 Android“充满了错误”。

任何帮助将不胜感激。

谢谢，本

原文

I am creating an app that detects frequencies of sound playing through the mic.
The analysis is done in an AsyncTask. It works when I try one note.

However, when I try to analyse 6 notes, say from different guitar strings, one after the other (with a delay of a second or so in between) it only captures maybe one more.

This is some of the LogCat output I get:

11-22 19:50:04.333: ERROR/AudioHardwareMSM72XX(1296): [doRouting]sndDevice=0,mCurSndDevice=-1
11-22 19:50:04.333: ERROR/AudioHardwareMSM72XX(1296): [SKW]do_route_audio_rpc(0, 1, 0)
11-22 19:50:04.333: ERROR/AudioHardwareMSM72XX(1296): msm72xx_enable_audpp: 0x0000
11-22 19:50:04.333: ERROR/AudioHardwareMSM72XX(1296): [doRouting]sndDevice=0,mCurSndDevice=0
11-22 19:50:30.523: ERROR/AudioHardwareMSM72XX(1296): Cannot open /dev/msm_pcm_in errno: 16
11-22 19:50:30.533: ERROR/AudioRecord(23241): Could not get audio input for record source 1
11-22 19:50:30.533: ERROR/AudioRecord-JNI(23241): Error creating AudioRecord instance: initialization check failed.
11-22 19:50:30.533: ERROR/AudioRecord-Java(23241): [ android.media.AudioRecord ] Error code -20 when initializing native AudioRecord object.

I deleted any repetitions for you all.

Here is the jist of my class:

static AudioRecord recorder;
static short[] audioData;
static int bufferSize;
static int samplerate = 8000;         
static boolean recorded = false;

@Override
protected Integer doInBackground(params) {

bufferSize= AudioRecord.getMinBufferSize(samplerate,AudioFormat.CHANNEL_CONFIGURATION_MONO,
            AudioFormat.ENCODING_PCM_16BIT)*2; 

recorder = new AudioRecord (AudioSource.MIC,samplerate,AudioFormat.CHANNEL_CONFIGURATION_MONO,
            AudioFormat.ENCODING_PCM_16BIT,bufferSize); 

    audioData = new short [bufferSize]; //short array that pcm data is put into.

    int recordingLoops = 0;
    while (recordingLoops < 4 || recorded) {  //loop until recording is running

    if (recorder.getState()==android.media.AudioRecord.STATE_INITIALIZED)
        if(recorder.getRecordingState()==android.media.AudioRecord.RECORDSTATE_STOPPED)
              recorder.startRecording();                     
        else {         
           recorder.read(audioData,0,bufferSize); 

           getFrequencyFromAudiodata(audioData);

           recorded = true;
             }        
    recordingLoops++;  
}

    if (recorder.getState()==android.media.AudioRecord.RECORDSTATE_RECORDING) 
    {
        killRecorder();
    }

    return 1;
}

Have you guys got any idea what is happening? I have done some looking around but I seem to just be running into people saying Android is 'full of bugs'.

Any help would be massively appreciated.

Thanks, Ben

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

南笙 2024-12-24 09:56:28

答案在于：

while (recordingLoops < 4 || recorded)

我将其更改为：

while (!recorded)

并且仅当音频数据数组足够填充时才将记录器设置为 true。
这意味着它会循环直到完美。感谢您的帮助戴夫！

The answer lay in this:

while (recordingLoops < 4 || recorded)

I changed it to:

while (!recorded)

And only set recorder to true when the array of audio data was sufficiently populated.
This meant it would loop until perfect. thanks for your help Dave!

回复收藏 0 原文