Start building libOpenglRender and add more host support files

Bug: 171711491
Change-Id: Ie1a6ca9cc5310e5ee2a72ae558450bcb4f2b9263
diff --git a/host-common/MediaVpxVideoHelper.h b/host-common/MediaVpxVideoHelper.h
new file mode 100644
index 0000000..9a88c4d
--- /dev/null
+++ b/host-common/MediaVpxVideoHelper.h
@@ -0,0 +1,89 @@
+// Copyright (C) 2020 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.
+
+#pragma once
+
+#include "android/emulation/MediaSnapshotState.h"
+#include "android/emulation/MediaVideoHelper.h"
+
+#include <cstdint>
+#include <list>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <vector>
+
+extern "C" {
+#include "vpx/vp8dx.h"
+#include "vpx/vpx_codec.h"
+#include "vpx/vpx_decoder.h"
+#include "vpx/vpx_image.h"
+}
+
+#include <stdio.h>
+#include <string.h>
+
+#include <stddef.h>
+
+namespace android {
+namespace emulation {
+
+class MediaVpxVideoHelper : public MediaVideoHelper {
+public:
+    MediaVpxVideoHelper(int type, int threads);
+    ~MediaVpxVideoHelper() override;
+
+    // return true if success; false otherwise
+    bool init() override;
+    void decode(const uint8_t* frame,
+                size_t szBytes,
+                uint64_t inputPts) override;
+    void flush() override;
+    void deInit() override;
+
+private:
+    int mType = 0;
+    int mThreadCount = 1;
+
+    // vpx stuff
+    std::unique_ptr<vpx_codec_ctx_t> mCtx;
+
+    // Owned by the vpx context. Needs to be initialized to nullptr on the first
+    // vpx_codec_get_frame() call.
+    vpx_codec_iter_t mIter = nullptr;
+
+    // Owned by the vpx context. mImg is set when calling vpx_codec_get_frame().
+    // mImg remains valid until the next vpx_codec_decode() is called.
+    vpx_image_t* mImg = nullptr;
+
+    void fetchAllFrames();
+    // helper methods
+    void copyImgToGuest(vpx_image_t* mImg, std::vector<uint8_t>& byteBuffer);
+    void copyYV12FrameToOutputBuffer(size_t outputBufferWidth,
+                                     size_t outputBufferHeight,
+                                     size_t imgWidth,
+                                     size_t imgHeight,
+                                     int32_t bpp,
+                                     uint8_t* dst,
+                                     const uint8_t* srcY,
+                                     const uint8_t* srcU,
+                                     const uint8_t* srcV,
+                                     size_t srcYStride,
+                                     size_t srcUStride,
+                                     size_t srcVStride);
+
+};  // MediaVpxVideoHelper
+
+}  // namespace emulation
+}  // namespace android