Handle voice note media playback with ExoPlayer.

There are several (popular) phone models out there that have bugs in
their MediaPlayer implementation that cause them to be unable to play
voice notes. By moving to ExoPlayer, an application-level media player,
we should avoid most of these headaches and stardardize playback.

Fixes #7748

src/org/thoughtcrime/securesms/video/VideoPlayer.java

@@ -46,6 +46,7 @@ import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
 import com.google.android.exoplayer2.trackselection.TrackSelection;
 import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
 import com.google.android.exoplayer2.trackselection.TrackSelector;
+import com.google.android.exoplayer2.ui.PlayerView;
 import com.google.android.exoplayer2.ui.SimpleExoPlayerView;
 import com.google.android.exoplayer2.upstream.BandwidthMeter;
 import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
@@ -66,7 +67,7 @@ public class VideoPlayer extends FrameLayout {
   private static final String TAG = VideoPlayer.class.getName();
 
   @Nullable private final VideoView           videoView;
-  @Nullable private final SimpleExoPlayerView exoView;
+  @Nullable private final PlayerView          exoView;
 
   @Nullable private       SimpleExoPlayer     exoPlayer;
   @Nullable private       AttachmentServer    attachmentServer;

src/org/thoughtcrime/securesms/video/exo/AttachmentDataSource.java

@@ -6,10 +6,14 @@ import android.net.Uri;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.DataSpec;
 import com.google.android.exoplayer2.upstream.DefaultDataSource;
+import com.google.android.exoplayer2.upstream.TransferListener;
 
 import org.thoughtcrime.securesms.mms.PartAuthority;
 
 import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
 
 public class AttachmentDataSource implements DataSource {
 
@@ -23,6 +27,10 @@ public class AttachmentDataSource implements DataSource {
     this.partDataSource    = partDataSource;
   }
 
+  @Override
+  public void addTransferListener(TransferListener transferListener) {
+  }
+
   @Override
   public long open(DataSpec dataSpec) throws IOException {
     if (PartAuthority.isLocalUri(dataSpec.uri)) dataSource = partDataSource;
@@ -41,6 +49,11 @@ public class AttachmentDataSource implements DataSource {
     return dataSource.getUri();
   }
 
+  @Override
+  public Map<String, List<String>> getResponseHeaders() {
+    return Collections.emptyMap();
+  }
+
   @Override
   public void close() throws IOException {
     dataSource.close();

src/org/thoughtcrime/securesms/video/exo/AttachmentDataSourceFactory.java

@@ -13,12 +13,12 @@ public class AttachmentDataSourceFactory implements DataSource.Factory {
 
   private final Context context;
 
-  private final DefaultDataSourceFactory             defaultDataSourceFactory;
-  private final TransferListener<? super DataSource> listener;
+  private final DefaultDataSourceFactory defaultDataSourceFactory;
+  private final TransferListener         listener;
 
   public AttachmentDataSourceFactory(@NonNull Context context,
                                      @NonNull DefaultDataSourceFactory defaultDataSourceFactory,
-                                     @Nullable TransferListener<? super DataSource> listener)
+                                     @Nullable TransferListener listener)
   {
     this.context                  = context;
     this.defaultDataSourceFactory = defaultDataSourceFactory;

src/org/thoughtcrime/securesms/video/exo/PartDataSource.java

@@ -18,20 +18,27 @@ import org.thoughtcrime.securesms.mms.PartUriParser;
 import java.io.EOFException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
 
 public class PartDataSource implements DataSource {
 
-  private final @NonNull  Context      context;
-  private final @Nullable TransferListener<? super PartDataSource> listener;
+  private final @NonNull  Context          context;
+  private final @Nullable TransferListener listener;
 
   private Uri         uri;
   private InputStream inputSteam;
 
-  PartDataSource(@NonNull Context context, @Nullable TransferListener<? super PartDataSource> listener) {
+  PartDataSource(@NonNull Context context, @Nullable TransferListener listener) {
     this.context  = context.getApplicationContext();
     this.listener = listener;
   }
 
+  @Override
+  public void addTransferListener(TransferListener transferListener) {
+  }
+
   @Override
   public long open(DataSpec dataSpec) throws IOException {
     this.uri = dataSpec.uri;
@@ -45,7 +52,7 @@ public class PartDataSource implements DataSource {
     this.inputSteam = attachmentDatabase.getAttachmentStream(partUri.getPartId(), dataSpec.position);
 
     if (listener != null) {
-      listener.onTransferStart(this, dataSpec);
+      listener.onTransferStart(this, dataSpec, false);
     }
 
     if (attachment.getSize() - dataSpec.position <= 0) throw new EOFException("No more data");
@@ -58,7 +65,7 @@ public class PartDataSource implements DataSource {
     int read = inputSteam.read(buffer, offset, readLength);
 
     if (read > 0 && listener != null) {
-      listener.onBytesTransferred(this, read);
+      listener.onBytesTransferred(this, null, false, read);
     }
 
     return read;
@@ -69,6 +76,11 @@ public class PartDataSource implements DataSource {
     return uri;
   }
 
+  @Override
+  public Map<String, List<String>> getResponseHeaders() {
+    return Collections.emptyMap();
+  }
+
   @Override
   public void close() throws IOException {
     inputSteam.close();