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authorMarco Nelissen <marcone@google.com>2012-08-24 09:55:44 -0700
committerMarco Nelissen <marcone@google.com>2012-08-24 10:36:51 -0700
commitc209a06cfdcf633f12a299245312e3ac32bff27c (patch)
tree036c6847186f84384127378e914da23326f3a969 /media/java
parent6715d1effaa70abf261112d2771d4d555cc109c2 (diff)
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Let apps provide a custom data source for extractors
Adds android.media.DataSource, which is modeled after its native namesake, and a new method on MediaExtractor that lets apps specify their implementation of a DataSource as the source of data for the extractor. Change-Id: If1b169bd18d2691ebc4f8996494dfc8ee0894b6c
Diffstat (limited to 'media/java')
-rw-r--r--media/java/android/media/DataSource.java43
-rw-r--r--media/java/android/media/MediaExtractor.java7
2 files changed, 50 insertions, 0 deletions
diff --git a/media/java/android/media/DataSource.java b/media/java/android/media/DataSource.java
new file mode 100644
index 0000000..347bd5f
--- /dev/null
+++ b/media/java/android/media/DataSource.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package android.media;
+
+import java.io.Closeable;
+
+/**
+ * An abstraction for a media data source, e.g. a file or an http stream
+ * {@hide}
+ */
+public interface DataSource extends Closeable {
+ /**
+ * Reads data from the data source at the requested position
+ *
+ * @param offset where in the source to read
+ * @param buffer the buffer to read the data into
+ * @param size how many bytes to read
+ * @return the number of bytes read, or -1 if there was an error
+ */
+ public int readAt(long offset, byte[] buffer, int size);
+
+ /**
+ * Gets the size of the data source.
+ *
+ * @return size of data source, or -1 if the length is unknown
+ */
+ public long getSize();
+}
diff --git a/media/java/android/media/MediaExtractor.java b/media/java/android/media/MediaExtractor.java
index 687d3a5..4b8d3cb 100644
--- a/media/java/android/media/MediaExtractor.java
+++ b/media/java/android/media/MediaExtractor.java
@@ -22,6 +22,7 @@ import android.content.res.AssetFileDescriptor;
import android.media.MediaCodec;
import android.media.MediaFormat;
import android.net.Uri;
+
import java.io.FileDescriptor;
import java.io.IOException;
import java.nio.ByteBuffer;
@@ -60,6 +61,12 @@ final public class MediaExtractor {
}
/**
+ * Sets the DataSource object to be used as the data source for this extractor
+ * {@hide}
+ */
+ public native final void setDataSource(DataSource source);
+
+ /**
* Sets the data source as a content Uri.
*
* @param context the Context to use when resolving the Uri