public class TAVAudioRecorder {
    // Constructors
    public TAVAudioRecorder(String outputPath);
    public TAVAudioRecorder(String outputPath, int sampleRate, int channelCount, @PcmEncoding int pcmEncoding);
}

/**
 * Starts recording
 * Required state: STATE_INITIALIZED or STATE_PAUSED
 */
public void start();

/**
 * Pauses recording
 * Required state: STATE_STARTED
 */
public void pause();

/**
 * Resumes recording (actually calls the start method)
 */
public void resume();

/**
 * Stops recording and completes file writing
 * Required state: any state
 */
public void stop();

/**
 * Releases recorder resources
 * Note: stop() must be called first
 */
public void release();

/**
 * Sets the recording status callback
 * @param listener recording listener
 */
public void setOnRecordingListener(OnRecordingListener listener);

/**
 * Gets the recorded duration (microseconds)
 * @return recorded duration
 */
public long getRecordedTimeUs();

/**
 * The time difference (milliseconds) from invoking audio recording to the actual start of recording
 * @return audio delay value
 */
public int getDelay();

public interface OnRecordingListener {
    /**
     * Processes the recording data buffer
     * @param buffer raw PCM data
     * @param count data length
     * @return processed data (the original buffer can be returned directly)
     */
    byte[] processBuffer(byte[] buffer, int count);
    
    /**
     * Recording completion callback
     */
    void onFinish();
    
    /**
     * Error callback
     * @param what error code (see Error Code Definitions)
     */
    void onError(int what);
}

// Create a recording instance (output path, sample rate 44100, mono, 16-bit sampling)
TAVAudioRecorder recorder = new TAVAudioRecorder("/sdcard/record.mp4a", 44100, 1, AudioFormat.ENCODING_PCM_16BIT);

// Set the recording listener
recorder.setOnRecordingListener(new TAVAudioRecorder.OnRecordingListener() {
    @Override
    public byte[] processBuffer(byte[] buffer, int count) {
        // Raw PCM data can be processed here
        return buffer;
    }

    @Override
    public void onFinish() {
        // Handle recording completion
    }

    @Override
    public void onError(int what) {
        // Error handling
    }
});

// Start recording
recorder.start();

// Pause recording
recorder.pause();

// Resume recording
recorder.resume();

// Stop recording
recorder.stop();

// Release resources
recorder.release();

// Get the recorded duration (microseconds)
long duration = recorder.getRecordedTimeUs();

// The time difference from invocation to the actual start of recording
int delay = recorder.getDelay();