Support content:// URIs, and some cleanup/consistency tweaks.

- There's definitely potential for more code sharing in these
classes, but deferring for now.
- Also made no-scheme default to file://, and allowed smoothstreaming
URLs to be specified with or without the /Manifest suffix.

demo/src/main/java/com/google/android/exoplayer/demo/player/SmoothStreamingRendererBuilder.java

@@ -92,8 +92,12 @@ public class SmoothStreamingRendererBuilder implements RendererBuilder,
   public void buildRenderers(DemoPlayer player, RendererBuilderCallback callback) {
     this.player = player;
     this.callback = callback;
+    String manifestUrl = url;
+    if (!manifestUrl.endsWith("/Manifest")) {
+      manifestUrl += "/Manifest";
+    }
     SmoothStreamingManifestParser parser = new SmoothStreamingManifestParser();
-    manifestFetcher = new ManifestFetcher<SmoothStreamingManifest>(url + "/Manifest",
+    manifestFetcher = new ManifestFetcher<SmoothStreamingManifest>(manifestUrl,
         new DefaultHttpDataSource(userAgent, null), parser);
     manifestFetcher.singleLoad(player.getMainHandler().getLooper(), this);
   }

library/src/main/java/com/google/android/exoplayer/upstream/AssetDataSource.java

@@ -31,7 +31,7 @@ import java.io.InputStream;
 public final class AssetDataSource implements UriDataSource {
 
   /**
-   * Thrown when IOException is encountered during local asset read operation.
+   * Thrown when an {@link IOException} is encountered reading a local asset.
    */
   public static final class AssetDataSourceException extends IOException {
 
@@ -45,7 +45,7 @@ public final class AssetDataSource implements UriDataSource {
   private final TransferListener listener;
 
   private String uriString;
-  private InputStream assetInputStream;
+  private InputStream inputStream;
   private long bytesRemaining;
   private boolean opened;
 
@@ -76,10 +76,11 @@ public final class AssetDataSource implements UriDataSource {
       } else if (path.startsWith("/")) {
         path = path.substring(1);
       }
-      assetInputStream = assetManager.open(path, AssetManager.ACCESS_RANDOM);
-      long skipped = assetInputStream.skip(dataSpec.position);
+      uriString = dataSpec.uri.toString();
+      inputStream = assetManager.open(path, AssetManager.ACCESS_RANDOM);
+      long skipped = inputStream.skip(dataSpec.position);
       Assertions.checkState(skipped == dataSpec.position);
-      bytesRemaining = dataSpec.length == C.LENGTH_UNBOUNDED ? assetInputStream.available()
+      bytesRemaining = dataSpec.length == C.LENGTH_UNBOUNDED ? inputStream.available()
           : dataSpec.length;
       if (bytesRemaining < 0) {
         throw new EOFException();
@@ -102,8 +103,7 @@ public final class AssetDataSource implements UriDataSource {
     } else {
       int bytesRead = 0;
       try {
-        bytesRead = assetInputStream.read(buffer, offset,
-            (int) Math.min(bytesRemaining, readLength));
+        bytesRead = inputStream.read(buffer, offset, (int) Math.min(bytesRemaining, readLength));
       } catch (IOException e) {
         throw new AssetDataSourceException(e);
       }
@@ -126,13 +126,14 @@ public final class AssetDataSource implements UriDataSource {
 
   @Override
   public void close() throws AssetDataSourceException {
-    if (assetInputStream != null) {
+    uriString = null;
+    if (inputStream != null) {
       try {
-        assetInputStream.close();
+        inputStream.close();
       } catch (IOException e) {
         throw new AssetDataSourceException(e);
       } finally {
-        assetInputStream = null;
+        inputStream = null;
         if (opened) {
           opened = false;
           if (listener != null) {

library/src/main/java/com/google/android/exoplayer/upstream/ContentDataSource.java

@@ -15,25 +15,25 @@
  */
 package com.google.android.exoplayer.upstream;
 
+import com.google.android.exoplayer.C;
+import com.google.android.exoplayer.util.Assertions;
+
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.res.AssetFileDescriptor;
 
-import com.google.android.exoplayer.C;
-
-import java.io.FileDescriptor;
+import java.io.EOFException;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 
 /**
- * This calll is support content uri and file uri (e.q. content:// , file://). 
- * {@link DataSource}.
+ * A content URI {@link UriDataSource}.
  */
 public final class ContentDataSource implements UriDataSource {
-  static private final String TAG = "ContentDataSource";
+
   /**
-   * Thrown when IOException is encountered during local asset read operation.
+   * Thrown when an {@link IOException} is encountered reading from a content URI.
    */
   public static class ContentDataSourceException extends IOException {
 
@@ -43,11 +43,11 @@ public final class ContentDataSource implements UriDataSource {
 
   }
 
+  private final ContentResolver resolver;
   private final TransferListener listener;
 
   private InputStream inputStream;
-  private Context context;
-  private String uri;
+  private String uriString;
   private long bytesRemaining;
   private boolean opened;
 
@@ -64,23 +64,25 @@ public final class ContentDataSource implements UriDataSource {
    * @param listener An optional listener. Specify {@code null} for no listener.
    */
   public ContentDataSource(Context context, TransferListener listener) {
-    this.context = context;
+    this.resolver = context.getContentResolver();
     this.listener = listener;
   }
 
   @Override
-  public long open(DataSpec dataSpec) throws IOException {
+  public long open(DataSpec dataSpec) throws ContentDataSourceException {
     try {
-      uri = dataSpec.uri.toString();
-      inputStream = new FileInputStream(getFileDescriptor(context, dataSpec));
-      inputStream.skip(dataSpec.position);
+      uriString = dataSpec.uri.toString();
+      AssetFileDescriptor assetFd = resolver.openAssetFileDescriptor(dataSpec.uri, "r");
+      inputStream = new FileInputStream(assetFd.getFileDescriptor());
+      long skipped = inputStream.skip(dataSpec.position);
+      Assertions.checkState(skipped == dataSpec.position);
       bytesRemaining = dataSpec.length == C.LENGTH_UNBOUNDED ? inputStream.available()
           : dataSpec.length;
       if (bytesRemaining < 0) {
-        throw new IOException();
+        throw new EOFException();
       }
     } catch (IOException e) {
-      throw new IOException(e);
+      throw new ContentDataSourceException(e);
     }
 
     opened = true;
@@ -92,7 +94,7 @@ public final class ContentDataSource implements UriDataSource {
   }
 
   @Override
-  public int read(byte[] buffer, int offset, int readLength) throws IOException {
+  public int read(byte[] buffer, int offset, int readLength) throws ContentDataSourceException {
     if (bytesRemaining == 0) {
       return -1;
     } else {
@@ -100,7 +102,7 @@ public final class ContentDataSource implements UriDataSource {
       try {
         bytesRead = inputStream.read(buffer, offset, (int) Math.min(bytesRemaining, readLength));
       } catch (IOException e) {
-        throw new IOException(e);
+        throw new ContentDataSourceException(e);
       }
 
       if (bytesRead > 0) {
@@ -116,11 +118,12 @@ public final class ContentDataSource implements UriDataSource {
 
   @Override
   public String getUri() {
-    return uri;
+    return uriString;
   }
 
   @Override
   public void close() throws ContentDataSourceException {
+    uriString = null;
     if (inputStream != null) {
       try {
         inputStream.close();
@@ -128,8 +131,6 @@ public final class ContentDataSource implements UriDataSource {
         throw new ContentDataSourceException(e);
       } finally {
         inputStream = null;
-        uri = null;
-
         if (opened) {
           opened = false;
           if (listener != null) {
@@ -140,17 +141,4 @@ public final class ContentDataSource implements UriDataSource {
     }
   }
 
-  /**
-   * query the fileDescriptor from conten resolver.
-   *
-   */
-  private static FileDescriptor getFileDescriptor(Context context, DataSpec dataSpec) throws IOException {
-    try {
-      ContentResolver resolver = context.getContentResolver();
-      AssetFileDescriptor fd = resolver.openAssetFileDescriptor(dataSpec.uri, "r");
-      return fd.getFileDescriptor();
-    } catch (IOException e) {
-      throw new IOException(e);
-    }
-  }
 }

library/src/main/java/com/google/android/exoplayer/upstream/DefaultUriDataSource.java

@@ -18,6 +18,7 @@ package com.google.android.exoplayer.upstream;
 import com.google.android.exoplayer.util.Assertions;
 
 import android.content.Context;
+import android.text.TextUtils;
 
 import java.io.IOException;
 
@@ -26,8 +27,11 @@ import java.io.IOException;
  *
  * <ul>
  * <li>http(s): For fetching data over HTTP and HTTPS (e.g. https://www.something.com/media.mp4).
- * <li>file: For fetching data from a local file (e.g. file:///path/to/media/media.mp4).
+ * <li>file: For fetching data from a local file (e.g. file:///path/to/media/media.mp4, or just
+ *     /path/to/media/media.mp4 because the implementation assumes that a URI without a scheme is a
+ *     local file URI).
  * <li>asset: For fetching data from an asset in the application's apk (e.g. asset:///media.mp4).
+ * <li>content: For fetching data from a content URI (e.g. content://authority/path/123).
  * </ul>
  */
 public final class DefaultUriDataSource implements UriDataSource {
@@ -56,10 +60,12 @@ public final class DefaultUriDataSource implements UriDataSource {
   private static final String SCHEME_HTTPS = "https";
   private static final String SCHEME_FILE = "file";
   private static final String SCHEME_ASSET = "asset";
+  private static final String SCHEME_CONTENT = "content";
 
   private final UriDataSource httpDataSource;
   private final UriDataSource fileDataSource;
   private final UriDataSource assetDataSource;
+  private final UriDataSource contentDataSource;
 
   /**
    * {@code null} if no data source is open. Otherwise, equal to {@link #fileDataSource} if the open
@@ -127,6 +133,7 @@ public final class DefaultUriDataSource implements UriDataSource {
     this.httpDataSource = Assertions.checkNotNull(httpDataSource);
     this.fileDataSource = new FileDataSource(listener);
     this.assetDataSource = new AssetDataSource(context, listener);
+    this.contentDataSource = new ContentDataSource(context, listener);
   }
 
   @Override
@@ -136,7 +143,7 @@ public final class DefaultUriDataSource implements UriDataSource {
     String scheme = dataSpec.uri.getScheme();
     if (SCHEME_HTTP.equals(scheme) || SCHEME_HTTPS.equals(scheme)) {
       dataSource = httpDataSource;
-    } else if (SCHEME_FILE.equals(scheme)) {
+    } else if (SCHEME_FILE.equals(scheme) || TextUtils.isEmpty(scheme)) {
       if (dataSpec.uri.getPath().startsWith("/android_asset/")) {
         dataSource = assetDataSource;
       } else {
@@ -144,6 +151,8 @@ public final class DefaultUriDataSource implements UriDataSource {
       }
     } else if (SCHEME_ASSET.equals(scheme)) {
       dataSource = assetDataSource;
+    } else if (SCHEME_CONTENT.equals(scheme)) {
+      dataSource = contentDataSource;
     } else {
       throw new UnsupportedSchemeException(scheme);
     }

library/src/main/java/com/google/android/exoplayer/upstream/FileDataSource.java

@@ -40,7 +40,7 @@ public final class FileDataSource implements UriDataSource {
   private final TransferListener listener;
 
   private RandomAccessFile file;
-  private String uri;
+  private String uriString;
   private long bytesRemaining;
   private boolean opened;
 
@@ -63,7 +63,7 @@ public final class FileDataSource implements UriDataSource {
   @Override
   public long open(DataSpec dataSpec) throws FileDataSourceException {
     try {
-      uri = dataSpec.uri.toString();
+      uriString = dataSpec.uri.toString();
       file = new RandomAccessFile(dataSpec.uri.getPath(), "r");
       file.seek(dataSpec.position);
       bytesRemaining = dataSpec.length == C.LENGTH_UNBOUNDED ? file.length() - dataSpec.position
@@ -108,11 +108,12 @@ public final class FileDataSource implements UriDataSource {
 
   @Override
   public String getUri() {
-    return uri;
+    return uriString;
   }
 
   @Override
   public void close() throws FileDataSourceException {
+    uriString = null;
     if (file != null) {
       try {
         file.close();
@@ -120,8 +121,6 @@ public final class FileDataSource implements UriDataSource {
         throw new FileDataSourceException(e);
       } finally {
         file = null;
-        uri = null;
-
         if (opened) {
           opened = false;
           if (listener != null) {