是的,Android的AudioEffect类可以实时调整。AudioEffect是Android提供的一套音频处理库,它允许开发者在播放音频时对其进行各种效果处理,如均衡器、混响、压缩等。
要实时调整AudioEffect的效果,你需要在播放音频的过程中,通过AudioEffect对象的setParameters()方法来修改参数。这个方法接受一个AudioEffect.Parameters对象作为参数,该对象包含了要修改的音频效果参数。
以下是一个简单的示例,演示了如何使用AudioEffect实时调整均衡器效果:
import android.media.AudioEffect; import android.media.AudioManager; import android.media.AudioFormat; import android.media.AudioTrack; public class AudioEffectExample { private static final int SAMPLE_RATE = 44100; private static final int CHANNEL_CONFIG = AudioFormat.CHANNEL_IN_MONO; private static final int ENCODING = AudioFormat.ENCODING_PCM_16BIT; private static final int EFFECT_TYPE = AudioEffect.EFFECT_TYPE_EQUALIZER; private static final int EQUALIZER_BAND = 0; private static final float BAND_GAIN = 0.5f; private AudioTrack audioTrack; private AudioEffect equalizerEffect; public void init() { // 初始化音频轨道 AudioManager audioManager = (AudioManager) getSystemService(AUDIO_SERVICE); int sampleRateInHz = SAMPLE_RATE; int channelConfig = CHANNEL_CONFIG; int encoding = ENCODING; audioTrack = new AudioTrack(MediaRecorder.AudioSource.MIC, sampleRateInHz, channelConfig, encoding, AudioTrack.getMinBufferSize(sampleRateInHz, channelConfig, encoding), AudioTrack.MODE_STREAM); audioTrack.play(); // 初始化均衡器效果 equalizerEffect = new AudioEffect(EFFECT_TYPE, false); equalizerEffect.setParameter(EQUALIZER_BAND, BAND_GAIN); } public void setEqualizerBandGain(int band, float gain) { equalizerEffect.setParameter(EQUALIZER_BAND, gain); } public void release() { if (audioTrack != null) { audioTrack.stop(); audioTrack.release(); audioTrack = null; } if (equalizerEffect != null) { equalizerEffect.release(); equalizerEffect = null; } } }
在这个示例中,我们首先初始化了一个音频轨道和一个均衡器效果。然后,我们可以通过调用setEqualizerBandGain()方法来实时调整指定频带的增益。注意,这个方法需要在播放音频的过程中调用,以便实时生效。最后,我们需要在使用完音频效果后释放它们。