From e2ce6458659c6e1bad420357b61dc10cd8bbe2ab Mon Sep 17 00:00:00 2001
From: Jamie Gennis <jgennis@google.com>
Date: Wed, 23 Feb 2011 19:01:28 -0800
Subject: 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 | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to '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 @@ enum {
     EMPTY_BUFFER,
     GET_EXTENSION_INDEX,
     OBSERVER_ON_MSG,
+    GET_GRAPHIC_BUFFER_USAGE,
 };
 
 class BpOMX : public BpInterface<IOMX> {
@@ -194,6 +195,19 @@ public:
         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 @@ status_t BnOMX::onTransact(
             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);
-- 
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