V4L2SVDA/VAAPIVDA: use visible size from decoder and pass to client

media/gpu/vp9_decoder.cc

 // Copyright 2015 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.
 
 #include "media/gpu/vp9_decoder.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 120 matching lines @@
         ref_frame = nullptr;
 
       pic_size_ = new_pic_size;
       return kAllocateNewSurfaces;
     }
 
     scoped_refptr<VP9Picture> pic = accelerator_->CreateVP9Picture();
     if (!pic)
       return kRanOutOfSurfaces;
 
+    gfx::Rect new_render_rect(curr_frame_hdr_->render_width,
+                              curr_frame_hdr_->render_height);
+    // For safety, check the validity of render size or leave it as (0, 0).
+    if (!gfx::Rect(pic_size_).Contains(new_render_rect)) {
+      DVLOG(2) << "Render size exceeds picture size. render size: "

[Pawel Osciak, 2017/06/19 06:27:40]

s/2/1/ please.

[johnylin1, 2017/06/19 07:13:28]

Done.

+               << new_render_rect.ToString()
+               << ", picture size: " << pic_size_.ToString();
+      new_render_rect = gfx::Rect();
+    }
+    DVLOG(2) << "Render resolution: " << new_render_rect.ToString();
+
+    pic->visible_rect = new_render_rect;
     pic->frame_hdr.reset(curr_frame_hdr_.release());
 
     if (!DecodeAndOutputPicture(pic)) {
       SetError();
       return kDecodeError;
     }
   }
 }
 
 void VP9Decoder::RefreshReferenceFrames(const scoped_refptr<VP9Picture>& pic) {
@@ skipping 53 matching lines @@
   return pic_size_;
 }
 
 size_t VP9Decoder::GetRequiredNumOfPictures() const {
   // kMaxVideoFrames to keep higher level media pipeline populated, +2 for the
   // pictures being parsed and decoded currently.
   return limits::kMaxVideoFrames + kVp9NumRefFrames + 2;
 }
 
 }  // namespace media