cc/resources/video_resource_updater.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 CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
   6 #define CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
   7
   8 #include <list>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "base/time/time.h"
  15 #include "cc/base/cc_export.h"
  16 #include "cc/resources/release_callback_impl.h"
  17 #include "cc/resources/resource_format.h"
  18 #include "cc/resources/texture_mailbox.h"
  19 #include "ui/gfx/geometry/size.h"
  20
  21 namespace media {
  22 class SkCanvasVideoRenderer;
  23 class VideoFrame;
  24 }
  25
  26 namespace cc {
  27 class ContextProvider;
  28 class ResourceProvider;
  29
  30 class CC_EXPORT VideoFrameExternalResources {
  31  public:
  32   // Specifies what type of data is contained in the mailboxes, as well as how
  33   // many mailboxes will be present.
  34   enum ResourceType {
  35     NONE,
  36     YUV_RESOURCE,
  37     RGB_RESOURCE,
  38     RGBA_RESOURCE,
  39     STREAM_TEXTURE_RESOURCE,
  40     IO_SURFACE,
  41
  42 #if defined(VIDEO_HOLE)
  43     // TODO(danakj): Implement this with a solid color layer instead of a video
  44     // frame and video layer.
  45     HOLE,
  46 #endif  // defined(VIDEO_HOLE)
  47
  48     // TODO(danakj): Remove this and abstract TextureMailbox into
  49     // "ExternalResource" that can hold a hardware or software backing.
  50     SOFTWARE_RESOURCE
  51   };
  52
  53   ResourceType type;
  54   std::vector<TextureMailbox> mailboxes;
  55   std::vector<ReleaseCallbackImpl> release_callbacks;
  56
  57   // TODO(danakj): Remove these too.
  58   std::vector<unsigned> software_resources;
  59   ReleaseCallbackImpl software_release_callback;
  60
  61   VideoFrameExternalResources();
  62   ~VideoFrameExternalResources();
  63 };
  64
  65 // VideoResourceUpdater is used by the video system to produce frame content as
  66 // resources consumable by the compositor.
  67 class CC_EXPORT VideoResourceUpdater
  68     : public base::SupportsWeakPtr<VideoResourceUpdater> {
  69  public:
  70   VideoResourceUpdater(ContextProvider* context_provider,
  71                        ResourceProvider* resource_provider);
  72   ~VideoResourceUpdater();
  73
  74   VideoFrameExternalResources CreateExternalResourcesFromVideoFrame(
  75       const scoped_refptr<media::VideoFrame>& video_frame);
  76
  77  private:
  78   struct PlaneResource {
  79     unsigned resource_id;
  80     gfx::Size resource_size;
  81     ResourceFormat resource_format;
  82     gpu::Mailbox mailbox;
  83     // The balance between the number of times this resource has been returned
  84     // from CreateForSoftwarePlanes vs released in RecycleResource.
  85     int ref_count;
  86     // These last three members will be used for identifying the data stored in
  87     // this resource, and uniquely identifies a media::VideoFrame plane. The
  88     // frame pointer will only be used for pointer comparison, i.e. the
  89     // underlying data will not be accessed.
  90     const void* frame_ptr;
  91     int plane_index;
  92     base::TimeDelta timestamp;
  93
  94     PlaneResource(unsigned resource_id,
  95                   const gfx::Size& resource_size,
  96                   ResourceFormat resource_format,
  97                   gpu::Mailbox mailbox);
  98   };
  99
 100   static bool PlaneResourceMatchesUniqueID(const PlaneResource& plane_resource,
 101                                            const media::VideoFrame* video_frame,
 102                                            int plane_index);
 103
 104   static void SetPlaneResourceUniqueId(const media::VideoFrame* video_frame,
 105                                        int plane_index,
 106                                        PlaneResource* plane_resource);
 107
 108   // This needs to be a container where iterators can be erased without
 109   // invalidating other iterators.
 110   typedef std::list<PlaneResource> ResourceList;
 111   ResourceList::iterator AllocateResource(const gfx::Size& plane_size,
 112                                           ResourceFormat format,
 113                                           bool has_mailbox);
 114   void DeleteResource(ResourceList::iterator resource_it);
 115   bool VerifyFrame(const scoped_refptr<media::VideoFrame>& video_frame);
 116   VideoFrameExternalResources CreateForHardwarePlanes(
 117       const scoped_refptr<media::VideoFrame>& video_frame);
 118   VideoFrameExternalResources CreateForSoftwarePlanes(
 119       const scoped_refptr<media::VideoFrame>& video_frame);
 120
 121   static void RecycleResource(base::WeakPtr<VideoResourceUpdater> updater,
 122                               unsigned resource_id,
 123                               uint32 sync_point,
 124                               bool lost_resource,
 125                               BlockingTaskRunner* main_thread_task_runner);
 126   static void ReturnTexture(base::WeakPtr<VideoResourceUpdater> updater,
 127                             const scoped_refptr<media::VideoFrame>& video_frame,
 128                             uint32 sync_point,
 129                             bool lost_resource,
 130                             BlockingTaskRunner* main_thread_task_runner);
 131
 132   ContextProvider* context_provider_;
 133   ResourceProvider* resource_provider_;
 134   scoped_ptr<media::SkCanvasVideoRenderer> video_renderer_;
 135   std::vector<uint8_t> upload_pixels_;
 136
 137   // Recycle resources so that we can reduce the number of allocations and
 138   // data transfers.
 139   ResourceList all_resources_;
 140
 141   DISALLOW_COPY_AND_ASSIGN(VideoResourceUpdater);
 142 };
 143
 144 }  // namespace cc
 145
 146 #endif  // CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_