Allow to use {FFmpeg/Vpx}VideoDecoder from a UtilityProcess

media/mojo/services/utility_mojo_media_client.cc

+// Copyright 2017 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/mojo/services/utility_mojo_media_client.h"
+
+#include "base/threading/thread_task_runner_handle.h"
+#include "media/base/media.h"
+#include "media/base/video_decoder.h"
+#include "media/mojo/common/mojo_shared_buffer_video_frame.h"
+#include "media/mojo/common/mojo_video_frame_provider.h"
+
+#if !defined(DISABLE_FFMPEG_VIDEO_DECODERS)
+#include "media/filters/ffmpeg_video_decoder.h"
+#endif
+
+namespace media {
+
+UtilityMojoMediaClient::UtilityMojoMediaClient() {}
+
+UtilityMojoMediaClient::~UtilityMojoMediaClient() {}
+
+void UtilityMojoMediaClient::Initialize(service_manager::Connector* connector) {
+  InitializeMediaLibrary();
+}
+
+std::unique_ptr<VideoDecoder> UtilityMojoMediaClient::CreateVideoDecoder(
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    mojom::CommandBufferIdPtr command_buffer_id) {
+  std::unique_ptr<VideoDecoder> decoder;
+
+#if !defined(DISABLE_FFMPEG_VIDEO_DECODERS)
+  std::unique_ptr<MojoVideoFrameProvider> video_frame_provider(
+      new MojoVideoFrameProvider());
+  decoder.reset(new FFmpegVideoDecoder(std::move(video_frame_provider)));
+#endif
+
+  return decoder;
+}
+
+}  // namespace media