Signal-Android/src/org/thoughtcrime/securesms/video/EncryptedMediaDataSource.java

package org.thoughtcrime.securesms.video;

import android.media.MediaDataSource;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;

import org.thoughtcrime.securesms.crypto.AttachmentSecret;

import java.io.File;

@RequiresApi(23)
public final class EncryptedMediaDataSource {

  public static MediaDataSource createFor(@NonNull AttachmentSecret attachmentSecret, @NonNull File mediaFile, @Nullable byte[] random, long length) {
    if (random == null) {
      return new ClassicEncryptedMediaDataSource(attachmentSecret, mediaFile, length);
    } else {
      return new ModernEncryptedMediaDataSource(attachmentSecret, mediaFile, random, length);
    }
  }

  public static MediaDataSource createForDiskBlob(@NonNull AttachmentSecret attachmentSecret, @NonNull File mediaFile) {
    return new ModernEncryptedMediaDataSource(attachmentSecret, mediaFile, null, 0);
  }
}