Motown: ffmpeg implementations of framework 'parts'

services/media/framework_ffmpeg/ffmpeg_decoder.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 SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_DECODER_H_
+#define SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_DECODER_H_
+
+#include <memory>
+
+#include "services/media/framework/parts/decoder.h"
+
+namespace mojo {
+namespace media {
+
+// Abstract base class for ffmpeg-based decoders, just the create function.
+// We don't want the base class implementation here, because we don't want
+// dependent targets to have to deal with ffmpeg includes.
+class FfmpegDecoder : public Decoder {
+ public:
+  // Creates an ffmpeg-based Decoder object for a given media type.
+  static Result Create(
+      const StreamType& stream_type,
+      std::shared_ptr<Decoder>* decoder_out);
+};
+
+}  // namespace media
+}  // namespace mojo
+
+#endif // SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_DECODER_H_