我正在开发流媒体广播应用程序。一切工作正常,除了改变均衡器效果不会影响声音。
通过调用 usePreset(preset) 更改均衡器效果不会对音效产生任何变化。
即使没有错误,为什么usePreset并没有改变音效。
我已经在三星 Galaxy sII 4.0.3 上进行了测试。
public void startPlayer() {
//
// Check whether we can acquire the audio focus
// to start the player
//
if (!requestAudioFocus()) {
return;
}
if (null != mAudioPlayer) {
if (mAudioPlayer.isPlaying()) {
mAudioPlayer.stop();
}
mAudioPlayer.reset();
} else {
mAudioPlayer = new MediaPlayer();
mAudioPlayer.reset();
}
try {
notifyProgressUpdate(PLAYER_INITIALIZING);
try {
mEqualizer = new Equalizer(0, mAudioPlayer.getAudioSessionId());
mEqualizer.setEnabled(true);
Log.d(TAG,
"Audio Session ID " + mAudioPlayer.getAudioSessionId()
+ "Equalizer " + mEqualizer + " Preset "
+ mEqualizer.getCurrentPreset());
} catch (Exception ex) {
mEqualizer = null;
}
mAudioPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mAudioPlayer.setDataSource(mCurrentTrack.getStreamURL());
//
// Add the Listener to track the player status
//
mAudioPlayer.setOnCompletionListener(this);
mAudioPlayer.setOnBufferingUpdateListener(this);
mAudioPlayer.setOnPreparedListener(this);
mAudioPlayer.setOnInfoListener(this);
mAudioPlayer.setOnErrorListener(this);
notifyProgressUpdate(PLAYER_BUFFERING);
mAudioPlayer.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//Get the available presets from the equalizer
public String[] getEqualizerPresets() {
String[] presets = null;
short noOfPresets = -1;
if (null != mEqualizer) {
noOfPresets = mEqualizer.getNumberOfPresets();
presets = new String[noOfPresets];
for (short index = 0; index < noOfPresets; index++) {
presets[index] = mEqualizer.getPresetName(index);
}
}
return presets;
}
//Set the user preferred presets
public void setEqualizerPreset(int position) {
if (null != mEqualizer) {
Log.d(TAG, "setting equlizer effects " + position);
Log.d(TAG, "Equalizer " + mEqualizer + " set Preset " + position);
mEqualizer.usePreset((short)position);
Log.d(TAG, "Equalizer " + mEqualizer + " current Preset "
+ mEqualizer.getCurrentPreset());
}
}
感谢您帮助确定问题。
EDIT这个问题还没有解决。我没有找到任何解释均衡器预设用法的示例代码。
欢迎参考任何使用预设的代码示例。
这是均衡器的完整源代码, http://kevinboone.net/android_simple_eq.html希望对你有帮助
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)