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

7 files changed, 94 insertions, 0 deletions

diff --git a/include/media/IOMX.h b/include/media/IOMX.h
index cb36bbb..16a9342 100644
--- a/include/media/IOMX.h
+++ b/include/media/IOMX.h
@@ -85,6 +85,9 @@ public:
     virtual status_t enableGraphicBuffers(
             node_id node, OMX_U32 port_index, OMX_BOOL enable) = 0;
 
+    virtual status_t getGraphicBufferUsage(
+            node_id node, OMX_U32 port_index, OMX_U32* usage) = 0;
+
     virtual status_t useBuffer(
             node_id node, OMX_U32 port_index, const sp<IMemory> &params,
             buffer_id *buffer) = 0;
diff --git a/include/media/stagefright/HardwareAPI.h b/include/media/stagefright/HardwareAPI.h
index 17908b4..d1ecaaf 100644
--- a/include/media/stagefright/HardwareAPI.h
+++ b/include/media/stagefright/HardwareAPI.h
@@ -87,6 +87,18 @@ struct UseAndroidNativeBufferParams {
     const sp<android_native_buffer_t>& nativeBuffer;
 };
 
+// A pointer to this struct is passed to OMX_GetParameter when the extension
+// index for the 'OMX.google.android.index.getAndroidNativeBufferUsage'
+// extension is given.  The usage bits returned from this query will be used to
+// allocate the Gralloc buffers that get passed to the useAndroidNativeBuffer
+// command.
+struct GetAndroidNativeBufferUsageParams {
+    OMX_U32 nSize;              // IN
+    OMX_VERSIONTYPE nVersion;   // IN
+    OMX_U32 nPortIndex;         // IN
+    OMX_U32 nUsage;             // OUT
+};
+
 }  // namespace android
 
 extern android::OMXPluginBase *createOMXPlugin();
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);
diff --git a/media/libstagefright/include/OMX.h b/media/libstagefright/include/OMX.h
index 5fed98a..ec3e5fa 100644
--- a/media/libstagefright/include/OMX.h
+++ b/media/libstagefright/include/OMX.h
@@ -62,6 +62,9 @@ public:
     virtual status_t enableGraphicBuffers(
             node_id node, OMX_U32 port_index, OMX_BOOL enable);
 
+    virtual status_t getGraphicBufferUsage(
+            node_id node, OMX_U32 port_index, OMX_U32* usage);
+
     virtual status_t storeMetaDataInBuffers(
             node_id node, OMX_U32 port_index, OMX_BOOL enable);
 
diff --git a/media/libstagefright/include/OMXNodeInstance.h b/media/libstagefright/include/OMXNodeInstance.h
index 86c102c..ca2578f 100644
--- a/media/libstagefright/include/OMXNodeInstance.h
+++ b/media/libstagefright/include/OMXNodeInstance.h
@@ -50,6 +50,9 @@ struct OMXNodeInstance {
     status_t setConfig(OMX_INDEXTYPE index, const void *params, size_t size);
 
     status_t enableGraphicBuffers(OMX_U32 portIndex, OMX_BOOL enable);
+
+    status_t getGraphicBufferUsage(OMX_U32 portIndex, OMX_U32* usage);
+
     status_t storeMetaDataInBuffers(OMX_U32 portIndex, OMX_BOOL enable);
 
     status_t useBuffer(
diff --git a/media/libstagefright/omx/OMX.cpp b/media/libstagefright/omx/OMX.cpp
index 3638f41..4b1c3a7 100644
--- a/media/libstagefright/omx/OMX.cpp
+++ b/media/libstagefright/omx/OMX.cpp
@@ -297,6 +297,11 @@ status_t OMX::enableGraphicBuffers(
     return findInstance(node)->enableGraphicBuffers(port_index, enable);
 }
 
+status_t OMX::getGraphicBufferUsage(
+        node_id node, OMX_U32 port_index, OMX_U32* usage) {
+    return findInstance(node)->getGraphicBufferUsage(port_index, usage);
+}
+
 status_t OMX::storeMetaDataInBuffers(
         node_id node, OMX_U32 port_index, OMX_BOOL enable) {
     return findInstance(node)->storeMetaDataInBuffers(port_index, enable);
diff --git a/media/libstagefright/omx/OMXNodeInstance.cpp b/media/libstagefright/omx/OMXNodeInstance.cpp
index c7c1409..6cbd599 100644
--- a/media/libstagefright/omx/OMXNodeInstance.cpp
+++ b/media/libstagefright/omx/OMXNodeInstance.cpp
@@ -302,6 +302,45 @@ status_t OMXNodeInstance::enableGraphicBuffers(
     return OK;
 }
 
+status_t OMXNodeInstance::getGraphicBufferUsage(
+        OMX_U32 portIndex, OMX_U32* usage) {
+    Mutex::Autolock autoLock(mLock);
+
+    OMX_INDEXTYPE index;
+    OMX_ERRORTYPE err = OMX_GetExtensionIndex(
+            mHandle,
+            const_cast<OMX_STRING>(
+                    "OMX.google.android.index.getAndroidNativeBufferUsage"),
+            &index);
+
+    if (err != OMX_ErrorNone) {
+        LOGE("OMX_GetExtensionIndex failed");
+
+        return StatusFromOMXError(err);
+    }
+
+    OMX_VERSIONTYPE ver;
+    ver.s.nVersionMajor = 1;
+    ver.s.nVersionMinor = 0;
+    ver.s.nRevision = 0;
+    ver.s.nStep = 0;
+    GetAndroidNativeBufferUsageParams params = {
+        sizeof(GetAndroidNativeBufferUsageParams), ver, portIndex, 0,
+    };
+
+    err = OMX_GetParameter(mHandle, index, &params);
+
+    if (err != OMX_ErrorNone) {
+        LOGE("OMX_GetAndroidNativeBufferUsage failed with error %d (0x%08x)",
+                err, err);
+        return UNKNOWN_ERROR;
+    }
+
+    *usage = params.nUsage;
+
+    return OK;
+}
+
 status_t OMXNodeInstance::storeMetaDataInBuffers(
         OMX_U32 portIndex,
         OMX_BOOL enable) {