src/media/filters/gpu_video_accelerator_factories.h

   1 // Copyright 2013 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 MEDIA_FILTERS_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
   6 #define MEDIA_FILTERS_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "media/video/video_decode_accelerator.h"
  11 #include "media/video/video_encode_accelerator.h"
  12
  13 namespace base {
  14 class SingleThreadTaskRunner;
  15 class SharedMemory;
  16 }
  17
  18 class SkBitmap;
  19
  20 namespace media {
  21
  22 // Helper interface for specifying factories needed to instantiate a hardware
  23 // video accelerator.
  24 // Threading model:
  25 // * The GpuVideoAcceleratorFactories may be constructed on any thread.
  26 // * The GpuVideoAcceleratorFactories has an associated message loop, which may
  27 //   be retrieved as |GetMessageLoop()|.
  28 // * All calls to the Factories after construction must be made on its message
  29 //   loop.
  30 class MEDIA_EXPORT GpuVideoAcceleratorFactories
  31     : public base::RefCountedThreadSafe<GpuVideoAcceleratorFactories> {
  32  public:
  33   // Caller owns returned pointer.
  34   virtual scoped_ptr<VideoDecodeAccelerator> CreateVideoDecodeAccelerator(
  35       VideoCodecProfile profile,
  36       VideoDecodeAccelerator::Client* client) = 0;
  37
  38   // Caller owns returned pointer.
  39   virtual scoped_ptr<VideoEncodeAccelerator> CreateVideoEncodeAccelerator(
  40       VideoEncodeAccelerator::Client* client) = 0;
  41
  42   // Allocate & delete native textures.
  43   virtual uint32 CreateTextures(int32 count,
  44                                 const gfx::Size& size,
  45                                 std::vector<uint32>* texture_ids,
  46                                 std::vector<gpu::Mailbox>* texture_mailboxes,
  47                                 uint32 texture_target) = 0;
  48   virtual void DeleteTexture(uint32 texture_id) = 0;
  49
  50   virtual void WaitSyncPoint(uint32 sync_point) = 0;
  51
  52   // Read pixels within |visible_rect| boundaries from a native texture and
  53   // store into |pixels| as RGBA.
  54   virtual void ReadPixels(uint32 texture_id,
  55                           const gfx::Rect& visible_rect,
  56                           const SkBitmap& pixels) = 0;
  57
  58   // Allocate & return a shared memory segment.  Caller is responsible for
  59   // Close()ing the returned pointer.
  60   virtual base::SharedMemory* CreateSharedMemory(size_t size) = 0;
  61
  62   // Returns the task runner the video accelerator runs on.
  63   virtual scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() = 0;
  64
  65  protected:
  66   friend class base::RefCountedThreadSafe<GpuVideoAcceleratorFactories>;
  67   virtual ~GpuVideoAcceleratorFactories();
  68 };
  69
  70 }  // namespace media
  71
  72 #endif  // MEDIA_FILTERS_GPU_VIDEO_ACCELERATOR_FACTORIES_H_