Add allocator interface for use by cdm_adapter

media/cdm/simple_cdm_allocator_unittest.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "media/base/video_frame.h"
+#include "media/cdm/api/content_decryption_module.h"
+#include "media/cdm/cdm_helpers.h"
+#include "media/cdm/simple_cdm_allocator.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media {
+
+class TestCdmBuffer : public cdm::Buffer {
+ public:
+  static TestCdmBuffer* Create(uint32_t capacity) {
+    return new TestCdmBuffer(capacity);
+  }
+
+  // cdm::Buffer implementation.
+  void Destroy() {
+    DestroyCalled();
+    delete this;
+  }
+  uint32_t Capacity() const { return buffer_.size(); }
+  uint8_t* Data() { return buffer_.data(); }
+  void SetSize(uint32_t size) { size_ = size > Capacity() ? 0 : size; }
+  uint32_t Size() const { return size_; }
+
+ private:
+  TestCdmBuffer(uint32_t capacity) : buffer_(capacity), size_(0) {
+    // Verify that Destroy() is called on this object.
+    EXPECT_CALL(*this, DestroyCalled());
+  }
+  ~TestCdmBuffer() final {}
+
+  MOCK_METHOD0(DestroyCalled, void());
+
+  std::vector<uint8_t> buffer_;
+  uint32_t size_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestCdmBuffer);
+};
+
+class SimpleCdmAllocatorTest : public testing::Test {
+ public:
+  SimpleCdmAllocatorTest() {}
+  ~SimpleCdmAllocatorTest() override {}
+
+ protected:
+  SimpleCdmAllocator allocator_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SimpleCdmAllocatorTest);
+};
+
+TEST_F(SimpleCdmAllocatorTest, CreateCdmBuffer) {
+  cdm::Buffer* buffer = allocator_.CreateCdmBuffer(100);
+  EXPECT_GE(buffer->Capacity(), 100u);
+  buffer->Destroy();
+}
+
+TEST_F(SimpleCdmAllocatorTest, CreateCdmVideoFrame) {
+  scoped_ptr<VideoFrameImpl> video_frame = allocator_.CreateCdmVideoFrame();
+  EXPECT_EQ(video_frame->FrameBuffer(), nullptr);
+  video_frame->SetFrameBuffer(TestCdmBuffer::Create(100));
+  EXPECT_NE(video_frame->FrameBuffer(), nullptr);
+
+  // Releasing |video_frame| should free the cdm::Buffer created above
+  // (verified by the mock method TestCdmBuffer::DestroyCalled).
+  video_frame.reset();
+}
+
+TEST_F(SimpleCdmAllocatorTest, TransformToVideoFrame) {
+  // For this test we need to pretend we have valid video data. So create
+  // a small video frame of size 2x2.
+  gfx::Size size(2, 2);
+  size_t memory_needed = VideoFrame::AllocationSize(PIXEL_FORMAT_YV12, size);
+
+  // Now create a VideoFrameImpl.
+  scoped_ptr<VideoFrameImpl> video_frame = allocator_.CreateCdmVideoFrame();
+  EXPECT_EQ(video_frame->FrameBuffer(), nullptr);
+
+  // Fill VideoFrameImpl as if it was a small video frame.
+  video_frame->SetFormat(cdm::kI420);
+  video_frame->SetSize(cdm::Size(size.width(), size.height()));
+  video_frame->SetFrameBuffer(TestCdmBuffer::Create(memory_needed));
+  video_frame->FrameBuffer()->SetSize(memory_needed);
+
+  // Now transform VideoFrameImpl to a VideoFrame, and make sure that
+  // FrameBuffer() is transferred to the new object.
+  EXPECT_NE(video_frame->FrameBuffer(), nullptr);
+  scoped_refptr<media::VideoFrame> transformed_frame =
+      video_frame->TransformToVideoFrame(size);
+  EXPECT_EQ(video_frame->FrameBuffer(), nullptr);
+
+  // Releasing |transformed_frame| should free the cdm::Buffer created above
+  // (verified by the mock method TestCdmBuffer::DestroyCalled).
+  transformed_frame = nullptr;
+}
+
+}  // namespace media