content/common/gpu/media/avda_state_provider.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 CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_DECODE_ACCELERATOR_STATE_PROVIDER_H_
#define CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_DECODE_ACCELERATOR_STATE_PROVIDER_H_

#include "base/compiler_specific.h"
#include "base/threading/thread_checker.h"
#include "content/common/content_export.h"
#include "media/video/video_decode_accelerator.h"

namespace gfx {
class SurfaceTexture;
}

namespace gpu {
namespace gles2 {
class GLES2Decoder;
}
}

namespace media {
class VideoCodecBridge;
}

namespace content {

// Helper class that provides the BackingStrategy with enough state
// to do useful work.
class AVDAStateProvider {
 public:
  virtual ~AVDAStateProvider() {}

  // Various handy getters.
  virtual const gfx::Size& GetSize() const = 0;
  virtual const base::ThreadChecker& ThreadChecker() const = 0;
  virtual base::WeakPtr<gpu::gles2::GLES2Decoder> GetGlDecoder() const = 0;

  // Helper function to report an error condition and stop decoding.
  // This will post NotifyError(), and transition to the error state.
  // It is meant to be called from the RETURN_ON_FAILURE macro.
  virtual void PostError(const ::tracked_objects::Location& from_here,
                         media::VideoDecodeAccelerator::Error error) = 0;
};

}  // namespace content

#endif  // CONTENT_COMMON_GPU_MEDIA_ANDROID_VIDEO_DECODE_ACCELERATOR_STATE_PROVIDER_H_