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

media/video/video_decode_accelerator.cc

 // Copyright (c) 2011 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 "media/video/video_decode_accelerator.h"
 
 #include <GLES2/gl2.h>
 #include "base/logging.h"
 
 namespace media {
@@ skipping 22 matching lines @@
 
 void VideoDecodeAccelerator::SetCdm(int cdm_id) {
   NOTREACHED() << "By default CDM is not supported.";
 }
 
 bool VideoDecodeAccelerator::TryToSetupDecodeOnSeparateThread(
     const base::WeakPtr<Client>& decode_client,
     const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner) {
   // Implementations in the process that VDA runs in must override this.
   LOG(FATAL) << "This may only be called in the same process as VDA impl.";
-  return false;  // not reached
+  return false;
+}
+
+void VideoDecodeAccelerator::ImportBufferForPicture(
+    int32_t picture_buffer_id,
+    const std::vector<gfx::GpuMemoryBufferHandle>& gpu_memory_buffer_handles) {
+  NOTREACHED() << "Buffer import not supported.";
 }
 
 GLenum VideoDecodeAccelerator::GetSurfaceInternalFormat() const {
   return GL_RGBA;
 }
 
+VideoPixelFormat VideoDecodeAccelerator::GetOutputFormat() const {
+  return PIXEL_FORMAT_UNKNOWN;
+}
+
 VideoDecodeAccelerator::SupportedProfile::SupportedProfile()
     : profile(media::VIDEO_CODEC_PROFILE_UNKNOWN), encrypted_only(false) {}
 
 VideoDecodeAccelerator::SupportedProfile::~SupportedProfile() {}
 
 VideoDecodeAccelerator::Capabilities::Capabilities() : flags(NO_FLAGS) {}
 
 VideoDecodeAccelerator::Capabilities::Capabilities(const Capabilities& other) =
     default;
 
@@ skipping 15 matching lines @@
 } // namespace media
 
 namespace std {
 
 void default_delete<media::VideoDecodeAccelerator>::operator()(
     media::VideoDecodeAccelerator* vda) const {
   vda->Destroy();
 }
 
 }  // namespace std