libgui: Add getConsumerName

Adds a getConsumerName method to IGraphicBufferProducer and Surface.
Currently, the name is cached inside of IGBP and is updated on connect
and dequeueBuffer, which should be good enough for most uses.

Bug: 6667401
Change-Id: Ife94bd89023fe7c00bad916932b9a19233fd2290

include/gui/BufferQueueProducer.h

@@ -178,6 +178,9 @@ public:
     // See IGraphicBufferProducer::setGenerationNumber
     virtual status_t setGenerationNumber(uint32_t generationNumber);
 
+    // See IGraphicBufferProducer::getConsumerName
+    virtual String8 getConsumerName() const override;
+
 private:
     // This is required by the IBinder::DeathRecipient interface
     virtual void binderDied(const wp<IBinder>& who);

include/gui/IGraphicBufferProducer.h

@@ -480,6 +480,9 @@ public:
     // affected and will retain their current generation number. The generation
     // number defaults to 0.
     virtual status_t setGenerationNumber(uint32_t generationNumber) = 0;
+
+    // Returns the name of the connected consumer.
+    virtual String8 getConsumerName() const = 0;
 };
 
 // ----------------------------------------------------------------------------

include/gui/Surface.h

@@ -106,6 +106,9 @@ public:
      * See IGBP::setGenerationNumber for more information. */
     status_t setGenerationNumber(uint32_t generationNumber);
 
+    // See IGraphicBufferProducer::getConsumerName
+    String8 getConsumerName() const;
+
 protected:
     virtual ~Surface();
 

libs/gui/BufferQueueProducer.cpp

@@ -1089,6 +1089,12 @@ status_t BufferQueueProducer::setGenerationNumber(uint32_t generationNumber) {
     return NO_ERROR;
 }
 
+String8 BufferQueueProducer::getConsumerName() const {
+    ATRACE_CALL();
+    BQ_LOGV("getConsumerName: %s", mConsumerName.string());
+    return mConsumerName;
+}
+
 void BufferQueueProducer::binderDied(const wp<android::IBinder>& /* who */) {
     // If we're here, it means that a producer we were connected to died.
     // We're guaranteed that we are still connected to it because we remove

libs/gui/IGraphicBufferProducer.cpp

@@ -48,6 +48,7 @@ enum {
     ALLOCATE_BUFFERS,
     ALLOW_ALLOCATION,
     SET_GENERATION_NUMBER,
+    GET_CONSUMER_NAME,
 };
 
 class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
@@ -296,6 +297,17 @@ public:
         }
         return result;
     }
+
+    virtual String8 getConsumerName() const {
+        Parcel data, reply;
+        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
+        status_t result = remote()->transact(GET_CONSUMER_NAME, data, &reply);
+        if (result != NO_ERROR) {
+            ALOGE("getConsumerName failed to transact: %d", result);
+            return String8("TransactFailed");
+        }
+        return reply.readString8();
+    }
 };
 
 // Out-of-line virtual method definition to trigger vtable emission in this
@@ -467,6 +479,11 @@ status_t BnGraphicBufferProducer::onTransact(
             reply->writeInt32(result);
             return NO_ERROR;
         }
+        case GET_CONSUMER_NAME: {
+            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
+            reply->writeString8(getConsumerName());
+            return NO_ERROR;
+        }
     }
     return BBinder::onTransact(code, data, reply, flags);
 }

libs/gui/Surface.cpp

@@ -111,6 +111,10 @@ status_t Surface::setGenerationNumber(uint32_t generation) {
     return result;
 }
 
+String8 Surface::getConsumerName() const {
+    return mGraphicBufferProducer->getConsumerName();
+}
+
 int Surface::hook_setSwapInterval(ANativeWindow* window, int interval) {
     Surface* c = getSelf(window);
     return c->setSwapInterval(interval);

libs/gui/tests/BufferQueue_test.cpp

@@ -17,6 +17,8 @@
 #define LOG_TAG "BufferQueue_test"
 //#define LOG_NDEBUG 0
 
+#include "DummyConsumer.h"
+
 #include <gui/BufferItem.h>
 #include <gui/BufferQueue.h>
 #include <gui/IProducerListener.h>
@@ -67,12 +69,6 @@ protected:
     sp<IGraphicBufferConsumer> mConsumer;
 };
 
-struct DummyConsumer : public BnConsumerListener {
-    virtual void onFrameAvailable(const BufferItem& /* item */) {}
-    virtual void onBuffersReleased() {}
-    virtual void onSidebandStreamChanged() {}
-};
-
 static const uint32_t TEST_DATA = 0x12345678u;
 
 // XXX: Tests that fork a process to hold the BufferQueue must run before tests

libs/gui/tests/DummyConsumer.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2015 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.
+ */
+
+#include <gui/IConsumerListener.h>
+
+namespace android {
+
+struct DummyConsumer : public BnConsumerListener {
+    virtual void onFrameAvailable(const BufferItem& /* item */) {}
+    virtual void onBuffersReleased() {}
+    virtual void onSidebandStreamChanged() {}
+};
+
+} // namespace android

libs/gui/tests/Surface_test.cpp

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "DummyConsumer.h"
+
 #include <gtest/gtest.h>
 
 #include <binder/IMemory.h>
@@ -210,4 +212,20 @@ TEST_F(SurfaceTest, SettingGenerationNumber) {
     ASSERT_EQ(1U, graphicBuffer->getGenerationNumber());
 }
 
+TEST_F(SurfaceTest, GetConsumerName) {
+    sp<IGraphicBufferProducer> producer;
+    sp<IGraphicBufferConsumer> consumer;
+    BufferQueue::createBufferQueue(&producer, &consumer);
+
+    sp<DummyConsumer> dummyConsumer(new DummyConsumer);
+    consumer->consumerConnect(dummyConsumer, false);
+    consumer->setConsumerName(String8("TestConsumer"));
+
+    sp<Surface> surface = new Surface(producer);
+    sp<ANativeWindow> window(surface);
+    native_window_api_connect(window.get(), NATIVE_WINDOW_API_CPU);
+
+    EXPECT_STREQ("TestConsumer", surface->getConsumerName().string());
+}
+
 }