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

content/common/gpu/media/vp8_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_VP8_DECODER_H_
-#define CONTENT_COMMON_GPU_MEDIA_VP8_DECODER_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "content/common/gpu/media/accelerated_video_decoder.h"
-#include "content/common/gpu/media/vp8_picture.h"
-#include "media/filters/vp8_parser.h"
-
-namespace content {
-
-// Clients of this class are expected to pass raw VP8 stream and are expected
-// to provide an implementation of VP8Accelerator for offloading final steps
-// of the decoding process.
-//
-// This class must be created, called and destroyed on a single thread, and
-// does nothing internally on any other thread.
-class CONTENT_EXPORT VP8Decoder : public AcceleratedVideoDecoder {
- public:
-  class CONTENT_EXPORT VP8Accelerator {
-   public:
-    VP8Accelerator();
-    virtual ~VP8Accelerator();
-
-    // Create a new VP8Picture that the decoder client can use for decoding
-    // and pass back to this accelerator for decoding or reference.
-    // When the picture is no longer needed by decoder, it will just drop
-    // its reference to it, and it may do so at any time.
-    // Note that this may return nullptr if accelerator is not able to provide
-    // any new pictures at given time. The decoder is expected to handle
-    // this situation as normal and return from Decode() with kRanOutOfSurfaces.
-    virtual scoped_refptr<VP8Picture> CreateVP8Picture() = 0;
-
-    // Submit decode for |pic|, taking as arguments |frame_hdr| with parsed
-    // VP8 frame header information for current frame, and using |last_frame|,
-    // |golden_frame| and |alt_frame| as references, as per VP8 specification.
-    // Note that this runs the decode in hardware.
-    // Return true if successful.
-    virtual bool SubmitDecode(const scoped_refptr<VP8Picture>& pic,
-                              const media::Vp8FrameHeader* frame_hdr,
-                              const scoped_refptr<VP8Picture>& last_frame,
-                              const scoped_refptr<VP8Picture>& golden_frame,
-                              const scoped_refptr<VP8Picture>& alt_frame) = 0;
-
-    // Schedule output (display) of |pic|. Note that returning from this
-    // method does not mean that |pic| has already been outputted (displayed),
-    // but guarantees that all pictures will be outputted in the same order
-    // as this method was called for them. Decoder may drop its reference
-    // to |pic| after calling this method.
-    // Return true if successful.
-    virtual bool OutputPicture(const scoped_refptr<VP8Picture>& pic) = 0;
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(VP8Accelerator);
-  };
-
-  VP8Decoder(VP8Accelerator* accelerator);
-  ~VP8Decoder() override;
-
-  // content::AcceleratedVideoDecoder implementation.
-  bool Flush() override WARN_UNUSED_RESULT;
-  void Reset() override;
-  void SetStream(const uint8_t* ptr, size_t size) override;
-  DecodeResult Decode() override WARN_UNUSED_RESULT;
-  gfx::Size GetPicSize() const override;
-  size_t GetRequiredNumOfPictures() const override;
-
- private:
-  bool DecodeAndOutputCurrentFrame();
-  void RefreshReferenceFrames();
-
-  enum State {
-    kNeedStreamMetadata,  // After initialization, need a keyframe.
-    kDecoding,            // Ready to decode from any point.
-    kAfterReset,          // After Reset(), need a resume point.
-    kError,               // Error in decode, can't continue.
-  };
-
-  State state_;
-
-  media::Vp8Parser parser_;
-
-  std::unique_ptr<media::Vp8FrameHeader> curr_frame_hdr_;
-  scoped_refptr<VP8Picture> curr_pic_;
-  scoped_refptr<VP8Picture> last_frame_;
-  scoped_refptr<VP8Picture> golden_frame_;
-  scoped_refptr<VP8Picture> alt_frame_;
-
-  const uint8_t* curr_frame_start_;
-  size_t frame_size_;
-
-  gfx::Size pic_size_;
-  int horizontal_scale_;
-  int vertical_scale_;
-
-  VP8Accelerator* accelerator_;
-
-  DISALLOW_COPY_AND_ASSIGN(VP8Decoder);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_GPU_MEDIA_VP8_DECODER_H_