Migrate content/common/gpu/media code to media/gpu

content/common/gpu/media/accelerated_video_decoder.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_ACCELERATED_VIDEO_DECODER_H_
-#define CONTENT_COMMON_GPU_MEDIA_ACCELERATED_VIDEO_DECODER_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "content/common/content_export.h"
-#include "ui/gfx/geometry/size.h"
-
-namespace content {
-
-// An AcceleratedVideoDecoder is a video decoder that requires support from an
-// external accelerator (typically a hardware accelerator) to partially offload
-// the decode process after parsing stream headers, and performing reference
-// frame and state management.
-class CONTENT_EXPORT AcceleratedVideoDecoder {
- public:
-  AcceleratedVideoDecoder() {}
-  virtual ~AcceleratedVideoDecoder() {}
-
-  virtual void SetStream(const uint8_t* ptr, size_t size) = 0;
-
-  // Have the decoder flush its state and trigger output of all previously
-  // decoded surfaces. Return false on failure.
-  virtual bool Flush() WARN_UNUSED_RESULT = 0;
-
-  // Stop (pause) decoding, discarding all remaining inputs and outputs,
-  // but do not flush decoder state, so that playback can be resumed later,
-  // possibly from a different location.
-  // To be called during decoding.
-  virtual void Reset() = 0;
-
-  enum DecodeResult {
-    kDecodeError,  // Error while decoding.
-    // TODO(posciak): unsupported streams are currently treated as error
-    // in decoding; in future it could perhaps be possible to fall back
-    // to software decoding instead.
-    // kStreamError,  // Error in stream.
-    kAllocateNewSurfaces,  // Need a new set of surfaces to be allocated.
-    kRanOutOfStreamData,   // Need more stream data to proceed.
-    kRanOutOfSurfaces,     // Waiting for the client to free up output surfaces.
-  };
-
-  // Try to decode more of the stream, returning decoded frames asynchronously.
-  // Return when more stream is needed, when we run out of free surfaces, when
-  // we need a new set of them, or when an error occurs.
-  virtual DecodeResult Decode() WARN_UNUSED_RESULT = 0;
-
-  // Return dimensions/required number of output surfaces that client should
-  // be ready to provide for the decoder to function properly.
-  // To be used after Decode() returns kAllocateNewSurfaces.
-  virtual gfx::Size GetPicSize() const = 0;
-  virtual size_t GetRequiredNumOfPictures() const = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AcceleratedVideoDecoder);
-};
-
-}  //  namespace content
-
-#endif  // CONTENT_COMMON_GPU_MEDIA_ACCELERATED_VIDEO_DECODER_H_