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

content/common/gpu/media/vaapi_jpeg_decode_accelerator.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_VAAPI_JPEG_DECODE_ACCELERATOR_H_
-#define CONTENT_COMMON_GPU_MEDIA_VAAPI_JPEG_DECODE_ACCELERATOR_H_
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/single_thread_task_runner.h"
-#include "base/synchronization/lock.h"
-#include "base/threading/non_thread_safe.h"
-#include "base/threading/thread.h"
-#include "content/common/content_export.h"
-#include "content/common/gpu/media/shared_memory_region.h"
-#include "content/common/gpu/media/vaapi_jpeg_decoder.h"
-#include "content/common/gpu/media/vaapi_wrapper.h"
-#include "media/base/bitstream_buffer.h"
-#include "media/video/jpeg_decode_accelerator.h"
-
-namespace content {
-
-// Class to provide JPEG decode acceleration for Intel systems with hardware
-// support for it, and on which libva is available.
-// Decoding tasks are performed in a separate decoding thread.
-//
-// Threading/life-cycle: this object is created & destroyed on the GPU
-// ChildThread.  A few methods on it are called on the decoder thread which is
-// stopped during |this->Destroy()|, so any tasks posted to the decoder thread
-// can assume |*this| is still alive.  See |weak_this_| below for more details.
-class CONTENT_EXPORT VaapiJpegDecodeAccelerator
-    : public media::JpegDecodeAccelerator {
- public:
-  VaapiJpegDecodeAccelerator(
-      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
-  ~VaapiJpegDecodeAccelerator() override;
-
-  // media::JpegDecodeAccelerator implementation.
-  bool Initialize(media::JpegDecodeAccelerator::Client* client) override;
-  void Decode(const media::BitstreamBuffer& bitstream_buffer,
-              const scoped_refptr<media::VideoFrame>& video_frame) override;
-  bool IsSupported() override;
-
- private:
-  // An input buffer and the corresponding output video frame awaiting
-  // consumption, provided by the client.
-  struct DecodeRequest {
-    DecodeRequest(int32_t bitstream_buffer_id,
-                  std::unique_ptr<SharedMemoryRegion> shm,
-                  const scoped_refptr<media::VideoFrame>& video_frame);
-    ~DecodeRequest();
-
-    int32_t bitstream_buffer_id;
-    std::unique_ptr<SharedMemoryRegion> shm;
-    scoped_refptr<media::VideoFrame> video_frame;
-  };
-
-  // Notifies the client that an error has occurred and decoding cannot
-  // continue.
-  void NotifyError(int32_t bitstream_buffer_id, Error error);
-  void NotifyErrorFromDecoderThread(int32_t bitstream_buffer_id, Error error);
-  void VideoFrameReady(int32_t bitstream_buffer_id);
-
-  // Processes one decode |request|.
-  void DecodeTask(const std::unique_ptr<DecodeRequest>& request);
-
-  // Puts contents of |va_surface| into given |video_frame|, releases the
-  // surface and passes the |input_buffer_id| of the resulting picture to
-  // client for output.
-  bool OutputPicture(VASurfaceID va_surface_id,
-                     int32_t input_buffer_id,
-                     const scoped_refptr<media::VideoFrame>& video_frame);
-
-  // ChildThread's task runner.
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-
-  // GPU IO task runner.
-  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
-
-  // The client of this class.
-  Client* client_;
-
-  // WeakPtr<> pointing to |this| for use in posting tasks from the decoder
-  // thread back to the ChildThread.  Because the decoder thread is a member of
-  // this class, any task running on the decoder thread is guaranteed that this
-  // object is still alive.  As a result, tasks posted from ChildThread to
-  // decoder thread should use base::Unretained(this), and tasks posted from the
-  // decoder thread to the ChildThread should use |weak_this_|.
-  base::WeakPtr<VaapiJpegDecodeAccelerator> weak_this_;
-
-  scoped_refptr<VaapiWrapper> vaapi_wrapper_;
-
-  // Comes after vaapi_wrapper_ to ensure its destructor is executed before
-  // |vaapi_wrapper_| is destroyed.
-  std::unique_ptr<VaapiJpegDecoder> decoder_;
-  base::Thread decoder_thread_;
-  // Use this to post tasks to |decoder_thread_| instead of
-  // |decoder_thread_.task_runner()| because the latter will be NULL once
-  // |decoder_thread_.Stop()| returns.
-  scoped_refptr<base::SingleThreadTaskRunner> decoder_task_runner_;
-
-  // The current VA surface for decoding.
-  VASurfaceID va_surface_id_;
-  // The coded size associated with |va_surface_id_|.
-  gfx::Size coded_size_;
-  // The VA RT format associated with |va_surface_id_|.
-  unsigned int va_rt_format_;
-
-  // The WeakPtrFactory for |weak_this_|.
-  base::WeakPtrFactory<VaapiJpegDecodeAccelerator> weak_this_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(VaapiJpegDecodeAccelerator);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_GPU_MEDIA_VAAPI_JPEG_DECODE_ACCELERATOR_H_