upload android base code part1

android/frameworks/rs/rsGrallocConsumer.h

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+/*
+ * Copyright (C) 2013 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.
+ */
+
+#ifndef ANDROID_RS_GRALLOC_CONSUMER_H
+#define ANDROID_RS_GRALLOC_CONSUMER_H
+
+#include <media/NdkImage.h>
+#include <media/NdkImageReader.h>
+
+// ---------------------------------------------------------------------------
+namespace android {
+namespace renderscript {
+
+class Allocation;
+class Context;
+
+/**
+ * CpuConsumer is a BufferQueue consumer endpoint that allows direct CPU
+ * access to the underlying gralloc buffers provided by BufferQueue. Multiple
+ * buffers may be acquired by it at once, to be used concurrently by the
+ * CpuConsumer owner. Sets gralloc usage flags to be software-read-only.
+ * This queue is synchronous by default.
+ */
+class GrallocConsumer
+{
+  public:
+    GrallocConsumer(const Context *, Allocation *, uint32_t numAlloc);
+
+    virtual ~GrallocConsumer();
+    ANativeWindow* getNativeWindow();
+    media_status_t lockNextBuffer(uint32_t idx = 0);
+    media_status_t unlockBuffer(uint32_t idx = 0);
+    uint32_t getNextAvailableIdx(Allocation *a);
+    bool releaseIdx(uint32_t idx);
+    bool isActive();
+    uint32_t mNumAlloc;
+
+    static void onFrameAvailable(void* obj, AImageReader* reader);
+
+  private:
+    media_status_t releaseAcquiredBufferLocked(uint32_t idx);
+    // Boolean array to check if a position has been occupied or not.
+    bool *isIdxUsed;
+    Allocation **mAlloc;
+
+    const Context *mCtx;
+    AImageReader* mImgReader;
+    ANativeWindow* mNativeWindow;
+    AImageReader_ImageListener mReaderCb;
+    // Tracking for buffers acquired by the user
+    struct AcquiredBuffer {
+        AImage *mImg;
+        uint8_t *mBufferPointer;
+
+        AcquiredBuffer() :
+                mImg(nullptr),
+                mBufferPointer(nullptr) {
+        }
+    };
+    AcquiredBuffer *mAcquiredBuffer;
+};
+
+} // namespace renderscript
+} // namespace android
+
+#endif // ANDROID_RS_GRALLOC_CONSUMER_H