Load CMA backend from shared library

chromecast/media/cma/base/backend_client_callbacks.h

+// Copyright 2015 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 CHROMECAST_MEDIA_CMA_BASE_BACKEND_CLIENT_CALLBACKS_H_

[gunsch, 2015/07/27 17:14:49]

Let's put these somewhere a little higher level. Maybe cma/pipeline/ ? They're
not appropriate for use in all parts of CMA.

[halliwell, 2015/07/28 02:19:35]

Done.

+#define CHROMECAST_MEDIA_CMA_BASE_BACKEND_CLIENT_CALLBACKS_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "chromecast/public/media/media_component_device.h"
+#include "chromecast/public/media/video_pipeline_device.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+// Helper implementations of CMA backend client callback interfaces in
+// chromecast/public/media.  All implementations take a base::Callback
+// and handle forwarding the callback to the CMA thread if necessary.
+namespace chromecast {
+namespace media {
+
+class MediaComponentDeviceClientImpl : public MediaComponentDevice::Client {

[gunsch, 2015/07/27 17:14:49]

file nit: can we split these into three files? I know they'll be small, but I
hate looking at code that references "FrameStatusCBImpl" and then not being able
to figure out what file it's defined in.

[halliwell, 2015/07/28 02:19:35]

Yes I hate that too ... was being lazy here ... done :)

+ public:
+  MediaComponentDeviceClientImpl(const base::Closure& eos_cb);
+  ~MediaComponentDeviceClientImpl() override;
+
+  void OnEndOfStream() override;
+
+ private:
+  base::Closure eos_cb_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+};
+
+class VideoPipelineDeviceClientImpl : public VideoPipelineDevice::VideoClient {
+ public:
+  typedef base::Callback<void(const Size&)> SizeChangeCB;
+
+  VideoPipelineDeviceClientImpl(const SizeChangeCB& size_change_cb);
+  ~VideoPipelineDeviceClientImpl() override;
+
+  void OnNaturalSizeChanged(const Size& size) override;
+
+ private:
+  SizeChangeCB size_change_cb_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+};
+
+class FrameStatusCBImpl : public MediaComponentDevice::FrameStatusCB {
+ public:
+  typedef base::Callback<void(MediaComponentDevice::FrameStatus)> CallbackType;
+
+  FrameStatusCBImpl(const CallbackType& cb);
+  ~FrameStatusCBImpl() override;
+
+  void Run(MediaComponentDevice::FrameStatus status) override;
+
+ private:
+  CallbackType cb_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_BASE_BACKEND_CLIENT_CALLBACKS_H_