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| import android.media.MediaRecorder; | |
| import android.support.annotation.NonNull; | |
| import com.f2prateek.rx.android.schedulers.AndroidSchedulers; | |
| import java.io.File; | |
| import java.io.IOException; | |
| import java.util.concurrent.TimeUnit; | |
| import rx.Observable; | |
| import rx.subscriptions.Subscriptions; | |
| public class RxMediaRecorder { | |
| public static @NonNull MediaRecorder into(@NonNull File file) { | |
| final MediaRecorder recorder = new MediaRecorder(); | |
| recorder.setAudioSource(MediaRecorder.AudioSource.MIC); | |
| recorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_WB); | |
| recorder.setOutputFile(file.getAbsolutePath()); | |
| recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB); | |
| return recorder; | |
| } | |
| public static @NonNull Observable<Long> record(@NonNull MediaRecorder recorder) { | |
| return prepare(recorder).flatMap(RxMediaRecorder::stream); | |
| } | |
| static @NonNull Observable<MediaRecorder> prepare(@NonNull MediaRecorder recorder) { | |
| return Observable.create(subscriber -> { | |
| try { | |
| Threads.assertBg(); | |
| recorder.prepare(); | |
| subscriber.onNext(recorder); | |
| subscriber.onCompleted(); | |
| } catch (IOException e) { | |
| subscriber.onError(e); | |
| } | |
| }); | |
| } | |
| static @NonNull Observable<Long> stream(@NonNull MediaRecorder recorder) { | |
| return Observable.create(sub -> { | |
| sub.add(Subscriptions.create(() -> { | |
| Threads.assertBg(); | |
| recorder.stop(); | |
| recorder.reset(); | |
| recorder.release(); | |
| })); | |
| recorder.start(); | |
| final long start = System.currentTimeMillis(); | |
| sub.add(Observable.interval(16, TimeUnit.MILLISECONDS, AndroidSchedulers.mainThread()) | |
| .map(x -> System.currentTimeMillis() - start) | |
| .subscribe(sub)); | |
| }); | |
| } | |
| } |
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