content/common/gpu/media/gpu_jpeg_decode_accelerator.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_COMMON_GPU_MEDIA_GPU_JPEG_DECODE_ACCELERATOR_H_
   6 #define CONTENT_COMMON_GPU_MEDIA_GPU_JPEG_DECODE_ACCELERATOR_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "base/synchronization/waitable_event.h"
  11 #include "base/threading/non_thread_safe.h"
  12 #include "ipc/ipc_listener.h"
  13 #include "ipc/ipc_sender.h"
  14 #include "media/video/jpeg_decode_accelerator.h"
  15
  16 namespace base {
  17 class SingleThreadTaskRunner;
  18 }
  19
  20 namespace content {
  21 class GpuChannel;
  22
  23 class GpuJpegDecodeAccelerator
  24     : public IPC::Sender,
  25       public base::NonThreadSafe,
  26       public base::SupportsWeakPtr<GpuJpegDecodeAccelerator> {
  27  public:
  28   // |channel| must outlive this object.
  29   GpuJpegDecodeAccelerator(
  30       GpuChannel* channel,
  31       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
  32   ~GpuJpegDecodeAccelerator() override;
  33
  34   void AddClient(int32 route_id, IPC::Message* reply_msg);
  35
  36   void NotifyDecodeStatus(int32 route_id,
  37                           int32_t bitstream_buffer_id,
  38                           media::JpegDecodeAccelerator::Error error);
  39
  40   // Function to delegate sending to actual sender.
  41   bool Send(IPC::Message* message) override;
  42
  43   // Static query for JPEG supported. This query calls the appropriate
  44   // platform-specific version.
  45   static bool IsSupported();
  46
  47  private:
  48   using CreateJDAFp = scoped_ptr<media::JpegDecodeAccelerator> (*)(
  49           const scoped_refptr<base::SingleThreadTaskRunner>&);
  50
  51   class Client;
  52   class MessageFilter;
  53
  54   void ClientRemoved();
  55
  56   static scoped_ptr<media::JpegDecodeAccelerator> CreateV4L2JDA(
  57       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
  58   static scoped_ptr<media::JpegDecodeAccelerator> CreateVaapiJDA(
  59       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
  60
  61   // The lifetime of objects of this class is managed by a GpuChannel. The
  62   // GpuChannels destroy all the GpuJpegDecodeAccelerator that they own when
  63   // they are destroyed. So a raw pointer is safe.
  64   GpuChannel* channel_;
  65
  66   // The message filter to run JpegDecodeAccelerator::Decode on IO thread.
  67   scoped_refptr<MessageFilter> filter_;
  68
  69   // GPU child task runner.
  70   scoped_refptr<base::SingleThreadTaskRunner> child_task_runner_;
  71
  72   // GPU IO task runner.
  73   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
  74
  75   // Number of clients added to |filter_|.
  76   int client_number_;
  77
  78   DISALLOW_IMPLICIT_CONSTRUCTORS(GpuJpegDecodeAccelerator);
  79 };
  80
  81 }  // namespace content
  82
  83 #endif  // CONTENT_COMMON_GPU_MEDIA_GPU_JPEG_DECODE_ACCELERATOR_H_