Reland: Refactor Vaapi video decoder/encoder in preparation of Freon support

content/common/gpu/media/va_surface.h

 // Copyright 2013 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.
 //
 // This file contains the definition of VASurface class, used for decoding by
 // VaapiVideoDecodeAccelerator and VaapiH264Decoder.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_VA_SURFACE_H_
 #define CONTENT_COMMON_GPU_MEDIA_VA_SURFACE_H_
 
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "content/common/content_export.h"
 #include "third_party/libva/va/va.h"
+#include "ui/gfx/size.h"
 
 namespace content {
 
 // A VA-API-specific decode surface used by VaapiH264Decoder to decode into
 // and use as reference for decoding other surfaces. It is also handed by the
 // decoder to VaapiVideoDecodeAccelerator when the contents of the surface are
 // ready and should be displayed. VAVDA converts the surface contents into an
-// X Pixmap bound to a texture for display and releases its reference to it.
+// X/Drm Pixmap bound to a texture for display and releases its reference to it.
 // Decoder releases its references to the surface when it's done decoding and
 // using it as reference. Note that a surface may still be used for reference
 // after it's been sent to output and also after it is no longer used by VAVDA.
 // Thus, the surface can be in use by both VAVDA and the Decoder at the same
 // time, or by either of them, with the restriction that VAVDA will never get
 // the surface until the contents are ready, and it is guaranteed that the
 // contents will not change after that.
 // When both the decoder and VAVDA release their references to the surface,
 // it is freed and the release callback is executed to put the surface back
 // into available surfaces pool, which is managed externally.
@@ skipping 19 matching lines @@
 // | DecodeSurface is used for decoding, putting data into associated VASurface.
 // |      |
 // |      |--------------------------------------------------+
 // |      |                                                  |
 // |      v                                                  v
 // | DecodeSurface is to be output.              VaapiH264Decoder uses the
 // | VaapiH264Decoder passes the associated      DecodeSurface and associated
 // | VASurface to VaapiVideoDecodeAccelerator,   VASurface as reference for
 // | which stores it (taking a ref) on           decoding more frames.
 // | pending_output_cbs_ queue until an output               |
-// | TFPPicture becomes available.                           v
+// | VaapiPicture becomes available.                         v
 // |                 |                           Once the DecodeSurface is not
 // |                 |                           needed as reference anymore,
 // |                 v                           it is released, releasing the
-// | A TFPPicture becomes available after        associated VASurface reference.
+// | A VaapiPicture becomes available after      associated VASurface reference.
 // | the client of VVDA returns                              |
 // | a PictureBuffer associated with it. VVDA                |
 // | puts the contents of the VASurface into                 |
 // | it and releases the reference to VASurface.             |
 // |                 |                                       |
 // |                 '---------------------------------------'
 // |                                     |
 // |                                     v
 // | Neither VVDA nor VHD hold a reference to VASurface. VASurface is released,
 // | ReleaseCB gets called in its destructor, which puts the associated
 // | VASurfaceID back onto VVDA::available_va_surfaces_.
 // |                                     |
 // '-------------------------------------|
 //                                       |
 //                                       v
 //                       VaapiWrapper frees VASurfaceID.
 //
 class CONTENT_EXPORT VASurface : public base::RefCountedThreadSafe<VASurface> {
  public:
   // Provided by user, will be called when all references to the surface
   // are released.
   typedef base::Callback<void(VASurfaceID)> ReleaseCB;
 
-  VASurface(VASurfaceID va_surface_id, const ReleaseCB& release_cb);
+  VASurface(VASurfaceID va_surface_id,
+            const gfx::Size& size,
+            const ReleaseCB& release_cb);
 
   VASurfaceID id() {
     return va_surface_id_;
   }
 
+  const gfx::Size& size() const { return size_; }
+
  private:
   friend class base::RefCountedThreadSafe<VASurface>;
   ~VASurface();
 
   const VASurfaceID va_surface_id_;
+  gfx::Size size_;
   ReleaseCB release_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(VASurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_VA_SURFACE_H_