我正在嘗試從麥克風(fēng)獲取音頻并通過連接到輔助設(shè)備的揚(yáng)聲器進(jìn)行流式傳輸我使用了此代碼，但它在錄音機(jī)的初始化中不起作用，但我真正的問題是“這是正確的方法還是有更好的方法來做到這一點(diǎn)“如果是如何解決初始化音頻的問題public class MainActivity extends AppCompatActivity { private static final String TAG = "MainActivity"; // the buttons for start and Stop BoadCast Button mStartBoadCast; Button mStopBoadCast; // variables for audio recording AudioRecord recorder; private int sampleRate = 44100; private int channelConfig = AudioFormat.CHANNEL_IN_DEFAULT; private int audioFormat = AudioFormat.ENCODING_PCM_16BIT; int minBufSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat); private boolean status = true; // audio instance is meant for playing audio input from stream private AudioTrack speaker; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //init layout views initViews(); // init start boadcast method with the button initStartBoadCast(); // init stop boadcast method with the button initStartBoadCast(); } private void initStartBoadCast() { mStartBoadCast.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startBoadCast(); } }); } private void initStopBoadCast() { mStartBoadCast.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { stopBoadCast(); } }); } private void stopBoadCast() { //todo: add the function to stop boad casr status = false; recorder.release(); speaker.release(); }
1 回答
FFIVE
TA貢獻(xiàn)1797條經(jīng)驗(yàn) 獲得超6個贊
交易是在細(xì)節(jié)中，你沒有告訴我們這是如何不起作用或者它會給出什么樣的錯誤。我必須做一個類似的程序，這就是我所做的。
首先是音頻類：
class audio {
AudioRecord arec;
AudioTrack atrack;
private volatile boolean isRecording= false;
private static int buffer_size;
//final short[] buffer = new short[buffersize];
//short[] readbuffer = new short[buffersize];
private int sample_rate;//the rate of recording used to initialise AudioRecord
private int[] msample_rates = new int[]{44100, 22050, 11025, 8000};
private short audio_format;
private short[] audio_formats = new short[]{AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_16BIT};
private short channel_config;
private short[] channel_configs = new short[]{AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO};
private short channelOutConfig;
public AudioRecord findAudioRecord(){
for (int rate_f : msample_rates){
for (short audioformat_f : audio_formats){
for (short channelconfig_f : channel_configs){
try {
Log.i("AudioC", "Attempting rate : "+ rate_f + "Hz, bits: " + audioformat_f + ", Channel: " + channelconfig_f);
int buffersize_f = AudioRecord.getMinBufferSize(rate_f, channelconfig_f, audioformat_f);
Log.i("AudioC", "Buffersize: " + buffersize_f);
if (buffersize_f != AudioRecord.ERROR_BAD_VALUE){
//Check of we can instantiate and have a success
AudioRecord recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, rate_f, channelconfig_f, audioformat_f, buffersize_f);
Log.i("AudioC", "Recorder State Value: " + recorder.getState());
if(recorder.getState() == AudioRecord.STATE_INITIALIZED){
Log.i("Audio", "Success");
//global values
buffer_size = buffersize_f;
sample_rate = rate_f;
audio_format = audioformat_f;
channel_config = channelconfig_f;
if (channelconfig_f == AudioFormat.CHANNEL_IN_MONO) channelOutConfig = AudioFormat.CHANNEL_OUT_MONO;
else channelOutConfig = AudioFormat.CHANNEL_OUT_STEREO;
return recorder;
}
}
}catch (Exception e){
Log.i("AudioC", rate_f + " Exception, keep trying." + e);
}
}
}
}
Log.i("AudioC", "Failed to initialise the audio record state");
return null;
}
public void run(){
isRecording = true;
//initialization
android.os.Process.setThreadPriority(Process.THREAD_PRIORITY_AUDIO);
//getValidSampleRates();
// int buffersize = AudioRecord.getMinBufferSize(sample_rate,AudioFormat.CHANNEL_IN_MONO,AudioFormat.ENCODING_PCM_16BIT);
// arec = new AudioRecord(MediaRecorder.AudioSource.MIC,sample_rate, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, buffersize);
//The above lines were replaced by a looping function in order to test every occurrence of rate,audioformat and channelconfig which is usually different for different adroid devices
arec = findAudioRecord();//Still failed to initialize the Audio Recorder
atrack = new AudioTrack(AudioManager.STREAM_VOICE_CALL,
sample_rate,
channelOutConfig,
audio_format,
buffer_size,
AudioTrack.MODE_STREAM);
atrack.setPlaybackRate(sample_rate);
//run
byte[] buffer = new byte[buffer_size];
arec.startRecording();
atrack.play();
while (isRecording){
arec.read(buffer, 0, buffer_size);
atrack.write(buffer, 0,buffer.length);
}
arec.release();
atrack.release();
}
public void stop(){
isRecording= false;
arec.stop();
atrack.stop();
arec.release();
atrack.release();
}
}
然后從活動（主活動）的線程或意圖服務(wù)中調(diào)用它，以避免應(yīng)用程序凍結(jié)。線程示例：
class playerTask implements Runnable{
public audio mic_player = new audio(); //The audio class we declared above
private Thread t;
public playerTask(){
}
public void execTask(){
t = new Thread(this,"playing_Thread");
t.start();
}
public void abortTask(){
mic_player.stop();
}
public void run(){
mic_player.run();
}
}
然后從你的活動來看，
public class YourActivity extends AppCompatActivity {
ToggleButton onOff;
boolean playing = false;
// Once the app start recording, the recording thread freezes the screen because of the while loop, the it works
//directly with the main thread hence doesnt release the hand until forced to stop
//For that we need to create it's own thread hence being able to play sound without freezing the remaining of the app
//private Handler myHandler
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activity_main);
//Handler
//Route the sound to the AUX only and always
AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
audioManager.setMode(AudioManager.MODE_IN_CALL);
audioManager.setSpeakerphoneOn(false);
audioManager.setWiredHeadsetOn(true);
audioManager.setBluetoothScoOn(false);
final playerTask pl_task = new playerTask();
/////Use a toggle button to start or stop the recording///You could use anything
onOff = (ToggleButton)findViewById(R.id.OnOff);
onOff.setTextOff("PLAY");
onOff.setTextOn("STOP");
onOff.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
public void onCheckedChanged(CompoundButton buttonview, boolean isCheked){
//Running thread
if (isCheked){
messagefield.setText("Playing");
pl_task.execTask(); ///Start streaming
}
else{
messagefield.setText("Not Playing");
pl_task.abortTask(); ///Stop streaming
}
}
});
}
這些是您需要請求的權(quán)限：
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
添加回答
舉報
0/150
提交
取消