Introduce GpuVideoDecodeAcceleratorFactory.

content/public/common/gpu_video_decode_accelerator_factory.h

+// 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.
+
+#ifndef CONTENT_PUBLIC_GPU_GPU_VIDEO_DECODE_ACCELERATOR_FACTORY_H_
+#define CONTENT_PUBLIC_GPU_GPU_VIDEO_DECODE_ACCELERATOR_FACTORY_H_
+
+#include "base/memory/weak_ptr.h"

[kcwu, 2016/03/01 10:25:06]

unused

[Pawel Osciak, 2016/03/02 07:17:11]

Done.

+#include "base/threading/thread_checker.h"
+#include "content/public/common/gpu_video_decode_accelerator_helpers.h"
+#include "gpu/config/gpu_info.h"
+#include "media/video/video_decode_accelerator.h"
+
+namespace content {
+
+// This factory allows creation of VideoDecodeAccelerator implementations,
+// providing the most applicable VDA for current platform and given
+// configuration. To be used in GPU process only.
+class CONTENT_EXPORT GpuVideoDecodeAcceleratorFactory {
+ public:
+  ~GpuVideoDecodeAcceleratorFactory();
+
+  // Create a factory capable of producing VDA instances for current platform.
+  static scoped_ptr<GpuVideoDecodeAcceleratorFactory> Create(
+      const gpu_vda_helpers::GetGLContextCb& get_gl_context_cb,
+      const gpu_vda_helpers::MakeGLContextCurrentCb& make_context_current_cb,
+      const gpu_vda_helpers::BindGLImageCb& bind_image_cb);
+
+  static scoped_ptr<GpuVideoDecodeAcceleratorFactory> CreateWithGLES2Decoder(
+      const gpu_vda_helpers::GetGLContextCb& get_gl_context_cb,
+      const gpu_vda_helpers::MakeGLContextCurrentCb& make_context_current_cb,
+      const gpu_vda_helpers::BindGLImageCb& bind_image_cb,
+      const gpu_vda_helpers::GetGLES2DecoderCb& get_gles2_decoder_cb);
+
+  // Return decoder capabilities supported on the current platform.
+  static gpu::VideoDecodeAcceleratorCapabilities GetDecoderCapabilities();
+
+  // Create a VDA for the current platform for |client| with the given |config|.
+  // Return nullptr on failure.
+  scoped_ptr<media::VideoDecodeAccelerator> CreateVDA(
+      media::VideoDecodeAccelerator::Client* client,
+      const media::VideoDecodeAccelerator::Config& config);
+
+ private:
+  GpuVideoDecodeAcceleratorFactory(
+      const gpu_vda_helpers::GetGLContextCb& get_gl_context_cb,
+      const gpu_vda_helpers::MakeGLContextCurrentCb& make_context_current_cb,
+      const gpu_vda_helpers::BindGLImageCb& bind_image_cb,
+      const gpu_vda_helpers::GetGLES2DecoderCb& get_gles2_decoder_cb);
+
+  using CreateVDAFp = scoped_ptr<media::VideoDecodeAccelerator> (

[kcwu, 2016/03/01 10:25:06]

How about move this type into .cc file? This type is only used in CreateVDA(),
no need to be exposed in .h?

[Pawel Osciak, 2016/03/02 07:17:11]

Done.

+      GpuVideoDecodeAcceleratorFactory::*)();
+
+  scoped_ptr<media::VideoDecodeAccelerator> CreateDXVAVDA();
+  scoped_ptr<media::VideoDecodeAccelerator> CreateV4L2VDA();
+  scoped_ptr<media::VideoDecodeAccelerator> CreateV4L2SVDA();
+  scoped_ptr<media::VideoDecodeAccelerator> CreateVaapiVDA();
+  scoped_ptr<media::VideoDecodeAccelerator> CreateVTVDA();
+  scoped_ptr<media::VideoDecodeAccelerator> CreateOzoneVDA();
+  scoped_ptr<media::VideoDecodeAccelerator> CreateAndroidVDA();
+
+  const gpu_vda_helpers::GetGLContextCb get_gl_context_cb_;
+  const gpu_vda_helpers::MakeGLContextCurrentCb make_context_current_cb_;
+  const gpu_vda_helpers::BindGLImageCb bind_image_cb_;
+  const gpu_vda_helpers::GetGLES2DecoderCb& get_gles2_decoder_cb_;
+
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(GpuVideoDecodeAcceleratorFactory);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_GPU_GPU_VIDEO_DECODE_ACCELERATOR_FACTORY_H_