Revert of Implement software fallback for PPB_VideoDecoder.

content/renderer/pepper/video_decoder_shim.h

-// Copyright (c) 2014 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_RENDERER_PEPPER_VIDEO_DECODER_SHIM_H_
-#define CONTENT_RENDERER_PEPPER_VIDEO_DECODER_SHIM_H_
-
-#include <queue>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/containers/hash_tables.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/message_loop/message_loop_proxy.h"
-#include "gpu/command_buffer/common/mailbox.h"
-#include "media/base/video_decoder_config.h"
-#include "media/video/video_decode_accelerator.h"
-
-#include "ppapi/c/pp_codecs.h"
-
-namespace gpu {
-namespace gles2 {
-class GLES2Interface;
-}
-}
-
-namespace media {
-class DecoderBuffer;
-}
-
-namespace webkit {
-namespace gpu {
-class ContextProviderWebContext;
-}
-}
-
-namespace content {
-
-class PepperVideoDecoderHost;
-
-// This class is a shim to wrap a media::VideoDecoder so that it can be used
-// by PepperVideoDecoderHost in place of a media::VideoDecodeAccelerator.
-// This class should be constructed, used, and destructed on the main (render)
-// thread.
-class VideoDecoderShim : public media::VideoDecodeAccelerator {
- public:
-  explicit VideoDecoderShim(PepperVideoDecoderHost* host);
-  virtual ~VideoDecoderShim();
-
-  // media::VideoDecodeAccelerator implementation.
-  virtual bool Initialize(
-      media::VideoCodecProfile profile,
-      media::VideoDecodeAccelerator::Client* client) OVERRIDE;
-  virtual void Decode(const media::BitstreamBuffer& bitstream_buffer) OVERRIDE;
-  virtual void AssignPictureBuffers(
-      const std::vector<media::PictureBuffer>& buffers) OVERRIDE;
-  virtual void ReusePictureBuffer(int32 picture_buffer_id) OVERRIDE;
-  virtual void Flush() OVERRIDE;
-  virtual void Reset() OVERRIDE;
-  virtual void Destroy() OVERRIDE;
-
- private:
-  enum State {
-    UNINITIALIZED,
-    DECODING,
-    FLUSHING,
-    RESETTING,
-  };
-
-  struct PendingDecode;
-  struct PendingFrame;
-  class DecoderImpl;
-
-  void OnInitializeComplete(int32_t result, uint32_t texture_pool_size);
-  void OnDecodeComplete(int32_t result, uint32_t decode_id);
-  void OnOutputComplete(scoped_ptr<PendingFrame> frame);
-  void SendPictures();
-  void OnResetComplete();
-  void NotifyCompletedDecodes();
-  void DismissTexture(uint32_t texture_id);
-  void DeleteTexture(uint32_t texture_id);
-  // Call this whenever we change GL state that the plugin relies on, such as
-  // creating picture textures.
-  void FlushCommandBuffer();
-
-  scoped_ptr<DecoderImpl> decoder_impl_;
-  State state_;
-
-  PepperVideoDecoderHost* host_;
-  scoped_refptr<base::MessageLoopProxy> media_message_loop_;
-  scoped_refptr<webkit::gpu::ContextProviderWebContext> context_provider_;
-
-  // The current decoded frame size.
-  gfx::Size texture_size_;
-  // Map that takes the plugin's GL texture id to the renderer's GL texture id.
-  typedef base::hash_map<uint32_t, uint32_t> TextureIdMap;
-  TextureIdMap texture_id_map_;
-  // Available textures (these are plugin ids.)
-  std::vector<uint32_t> available_textures_;
-  // Track textures that are no longer needed (these are plugin ids.)
-  typedef base::hash_set<uint32_t> TextureIdSet;
-  TextureIdSet textures_to_dismiss_;
-  // Mailboxes for pending texture requests, to write to plugin's textures.
-  std::vector<gpu::Mailbox> pending_texture_mailboxes_;
-
-  // Queue of completed decode ids, for notifying the host.
-  typedef std::queue<uint32_t> CompletedDecodeQueue;
-  CompletedDecodeQueue completed_decodes_;
-
-  // Queue of decoded frames that have been converted to RGB and await upload to
-  // a GL texture.
-  typedef std::queue<linked_ptr<PendingFrame> > PendingFrameQueue;
-  PendingFrameQueue pending_frames_;
-
-  // The optimal number of textures to allocate for decoder_impl_.
-  uint32_t texture_pool_size_;
-
-  uint32_t num_pending_decodes_;
-
-  base::WeakPtrFactory<VideoDecoderShim> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(VideoDecoderShim);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_PEPPER_VIDEO_DECODER_SHIM_H_