commit e2ce6458659c6e1bad420357b61dc10cd8bbe2ab
author Jamie Gennis <jgennis@google.com> Wed Feb 23 19:01:28 2011 -0800
committer Jamie Gennis <jgennis@google.com> Mon Feb 28 12:12:20 2011 -0800
tree 89a59a1cef847dc359dbf013f0c76d94f6363918
parent 3911a720270fc0326accfa4a3df427a649a45487

Add an OMX IL API for querying buffer usage flags.

This change defines an OpenMAX IL API for querying from the IL component
the gralloc buffer usage flags that should be used to allocate the
buffers.  It also adds the Stagefright plumbing for using the new OMX IL
API.

Change-Id: I046b5e7be70ce61e2a921dcdc6e3aa9324d19ea6
Related-Bug: 3479027

media/libmedia/IOMX.cpp

diff --git a/media/libmedia/IOMX.cpp b/media/libmedia/IOMX.cpp
index af67175..d6a1757 100644
--- a/media/libmedia/IOMX.cpp
+++ b/media/libmedia/IOMX.cpp
@@ -33,6 +33,7 @@
     EMPTY_BUFFER,
     GET_EXTENSION_INDEX,
     OBSERVER_ON_MSG,
+    GET_GRAPHIC_BUFFER_USAGE,
 };
 
 class BpOMX : public BpInterface<IOMX> {
@@ -194,6 +195,19 @@
         return err;
     }
 
+    virtual status_t getGraphicBufferUsage(
+            node_id node, OMX_U32 port_index, OMX_U32* usage) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IOMX::getInterfaceDescriptor());
+        data.writeIntPtr((intptr_t)node);
+        data.writeInt32(port_index);
+        remote()->transact(GET_GRAPHIC_BUFFER_USAGE, data, &reply);
+
+        status_t err = reply.readInt32();
+        *usage = reply.readInt32();
+        return err;
+    }
+
     virtual status_t useBuffer(
             node_id node, OMX_U32 port_index, const sp<IMemory> &params,
             buffer_id *buffer) {
@@ -508,6 +522,21 @@
             return NO_ERROR;
         }
 
+        case GET_GRAPHIC_BUFFER_USAGE:
+        {
+            CHECK_INTERFACE(IOMX, data, reply);
+
+            node_id node = (void*)data.readIntPtr();
+            OMX_U32 port_index = data.readInt32();
+
+            OMX_U32 usage = 0;
+            status_t err = getGraphicBufferUsage(node, port_index, &usage);
+            reply->writeInt32(err);
+            reply->writeInt32(usage);
+
+            return NO_ERROR;
+        }
+
         case USE_BUFFER:
         {
             CHECK_INTERFACE(IOMX, data, reply);