Support external buffer import in VDA interface and add a V4L2SVDA impl.

content/public/gpu/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/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
@@ skipping 52 matching lines @@
       const MakeGLContextCurrentCallback& make_context_current_cb,
       const BindGLImageCallback& bind_image_cb);
 
   static std::unique_ptr<GpuVideoDecodeAcceleratorFactory>
   CreateWithGLES2Decoder(
       const GetGLContextCallback& get_gl_context_cb,
       const MakeGLContextCurrentCallback& make_context_current_cb,
       const BindGLImageCallback& bind_image_cb,
       const GetGLES2DecoderCallback& get_gles2_decoder_cb);
 
+  // Create a factory capable of producing VDA instances for current platform
+  // with no GL support.
+  // A factory created with this method will only be able to produce VDAs with
+  // no ability to call GL functions/access GL state. This also implies no
+  // ability to decode into textures provided by the client.
+  static std::unique_ptr<GpuVideoDecodeAcceleratorFactory> CreateWithNoGL();
+
   // 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|
   // and for given |gpu_preferences|. Return nullptr on failure.
   virtual std::unique_ptr<media::VideoDecodeAccelerator> CreateVDA(
       media::VideoDecodeAccelerator::Client* client,
       const media::VideoDecodeAccelerator::Config& config);
 
  private:
   // TODO(posciak): This is temporary and will not be needed once
   // GpuVideoDecodeAcceleratorFactoryImpl implements
   // GpuVideoDecodeAcceleratorFactory, see crbug.com/597150 and related.
   GpuVideoDecodeAcceleratorFactory(
       std::unique_ptr<GpuVideoDecodeAcceleratorFactoryImpl> gvdafactory_impl);
 
   std::unique_ptr<GpuVideoDecodeAcceleratorFactoryImpl> gvdafactory_impl_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_GPU_GPU_VIDEO_DECODE_ACCELERATOR_FACTORY_H_