From 99f31604136d66ae10e20669fb6b5716f342bde0 Mon Sep 17 00:00:00 2001
From: Chris Watkins <watk@google.com>
Date: Fri, 20 Mar 2015 13:06:33 -0700
Subject: Unhide the android.media.[Media]DataSource interface.

This allows apps to implement MediaDataSource, which is modeled on
stagefright's DataSource, to supply media data to the framework. This
was already implemented for MediaExtractor, but it was renamed from
DataSource.

MediaExtractor, MediaPlayer and MediaMetadataRetriever each have a new
overload: #setDataSource(android.media.MediaDataSource)

Only NuPlayer supports this new data source.

The change introduces:
 * IDataSource:        The binder interface for DataSource.
 * JMediaDataSource:   The native counterpart to the java interface. It
                       implements IDataSource.
 * CallbackDataSource: A stagefright DataSource that wraps an
                       IDataSource.

Change-Id: Ib3c944b49cc8a792c8eb9c85e5015c07f298ebc1
---
 media/libmedia/IMediaMetadataRetriever.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'media/libmedia/IMediaMetadataRetriever.cpp')

diff --git a/media/libmedia/IMediaMetadataRetriever.cpp b/media/libmedia/IMediaMetadataRetriever.cpp
index 551cffe..9765f0d 100644
--- a/media/libmedia/IMediaMetadataRetriever.cpp
+++ b/media/libmedia/IMediaMetadataRetriever.cpp
@@ -20,6 +20,7 @@
 #include <sys/types.h>
 
 #include <binder/Parcel.h>
+#include <media/IDataSource.h>
 #include <media/IMediaHTTPService.h>
 #include <media/IMediaMetadataRetriever.h>
 #include <utils/String8.h>
@@ -65,6 +66,7 @@ enum {
     DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
     SET_DATA_SOURCE_URL,
     SET_DATA_SOURCE_FD,
+    SET_DATA_SOURCE_CALLBACK,
     GET_FRAME_AT_TIME,
     EXTRACT_ALBUM_ART,
     EXTRACT_METADATA,
@@ -125,6 +127,15 @@ public:
         return reply.readInt32();
     }
 
+    status_t setDataSource(const sp<IDataSource>& source)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
+        data.writeStrongBinder(IInterface::asBinder(source));
+        remote()->transact(SET_DATA_SOURCE_CALLBACK, data, &reply);
+        return reply.readInt32();
+    }
+
     sp<IMemory> getFrameAtTime(int64_t timeUs, int option)
     {
         ALOGV("getTimeAtTime: time(%" PRId64 " us) and option(%d)", timeUs, option);
@@ -235,6 +246,13 @@ status_t BnMediaMetadataRetriever::onTransact(
             reply->writeInt32(setDataSource(fd, offset, length));
             return NO_ERROR;
         } break;
+        case SET_DATA_SOURCE_CALLBACK: {
+            CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
+            sp<IDataSource> source =
+                interface_cast<IDataSource>(data.readStrongBinder());
+            reply->writeInt32(setDataSource(source));
+            return NO_ERROR;
+        } break;
         case GET_FRAME_AT_TIME: {
             CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
             int64_t timeUs = data.readInt64();
-- 
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