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      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 <vector>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/memory/ref_counted.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "base/memory/weak_ptr.h"
     14 #include "cc/base/cc_export.h"
     15 #include "cc/resources/release_callback.h"
     16 #include "cc/resources/resource_format.h"
     17 #include "cc/resources/texture_mailbox.h"
     18 #include "ui/gfx/size.h"
     19 
     20 namespace media {
     21 class SkCanvasVideoRenderer;
     22 class VideoFrame;
     23 }
     24 
     25 namespace cc {
     26 class ContextProvider;
     27 class ResourceProvider;
     28 
     29 class CC_EXPORT VideoFrameExternalResources {
     30  public:
     31   // Specifies what type of data is contained in the mailboxes, as well as how
     32   // many mailboxes will be present.
     33   enum ResourceType {
     34     NONE,
     35     YUV_RESOURCE,
     36     RGB_RESOURCE,
     37     STREAM_TEXTURE_RESOURCE,
     38     IO_SURFACE,
     39 
     40 #if defined(VIDEO_HOLE)
     41     // TODO(danakj): Implement this with a solid color layer instead of a video
     42     // frame and video layer.
     43     HOLE,
     44 #endif  // defined(VIDEO_HOLE)
     45 
     46     // TODO(danakj): Remove this and abstract TextureMailbox into
     47     // "ExternalResource" that can hold a hardware or software backing.
     48     SOFTWARE_RESOURCE
     49   };
     50 
     51   ResourceType type;
     52   std::vector<TextureMailbox> mailboxes;
     53   std::vector<ReleaseCallback> release_callbacks;
     54 
     55   // TODO(danakj): Remove these too.
     56   std::vector<unsigned> software_resources;
     57   ReleaseCallback software_release_callback;
     58 
     59   VideoFrameExternalResources();
     60   ~VideoFrameExternalResources();
     61 };
     62 
     63 // VideoResourceUpdater is by the video system to produce frame content as
     64 // resources consumable by the compositor.
     65 class CC_EXPORT VideoResourceUpdater
     66     : public base::SupportsWeakPtr<VideoResourceUpdater> {
     67  public:
     68   explicit VideoResourceUpdater(ContextProvider* context_provider,
     69                                 ResourceProvider* resource_provider);
     70   ~VideoResourceUpdater();
     71 
     72   VideoFrameExternalResources CreateExternalResourcesFromVideoFrame(
     73       const scoped_refptr<media::VideoFrame>& video_frame);
     74 
     75  private:
     76   struct PlaneResource {
     77     unsigned resource_id;
     78     gfx::Size resource_size;
     79     ResourceFormat resource_format;
     80     gpu::Mailbox mailbox;
     81 
     82     PlaneResource(unsigned resource_id,
     83                   gfx::Size resource_size,
     84                   ResourceFormat resource_format,
     85                   gpu::Mailbox mailbox)
     86         : resource_id(resource_id),
     87           resource_size(resource_size),
     88           resource_format(resource_format),
     89           mailbox(mailbox) {}
     90   };
     91 
     92   void DeleteResource(unsigned resource_id);
     93   bool VerifyFrame(const scoped_refptr<media::VideoFrame>& video_frame);
     94   VideoFrameExternalResources CreateForHardwarePlanes(
     95       const scoped_refptr<media::VideoFrame>& video_frame);
     96   VideoFrameExternalResources CreateForSoftwarePlanes(
     97       const scoped_refptr<media::VideoFrame>& video_frame);
     98 
     99   struct RecycleResourceData {
    100     unsigned resource_id;
    101     gfx::Size resource_size;
    102     ResourceFormat resource_format;
    103     gpu::Mailbox mailbox;
    104   };
    105   static void RecycleResource(base::WeakPtr<VideoResourceUpdater> updater,
    106                               RecycleResourceData data,
    107                               unsigned sync_point,
    108                               bool lost_resource);
    109 
    110   ContextProvider* context_provider_;
    111   ResourceProvider* resource_provider_;
    112   scoped_ptr<media::SkCanvasVideoRenderer> video_renderer_;
    113 
    114   std::vector<unsigned> all_resources_;
    115   std::vector<PlaneResource> recycled_resources_;
    116 
    117   DISALLOW_COPY_AND_ASSIGN(VideoResourceUpdater);
    118 };
    119 
    120 }  // namespace cc
    121 
    122 #endif  // CC_RESOURCES_VIDEO_RESOURCE_UPDATER_H_
    123