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

media/gpu/vp9_decoder.cc

Index: media/gpu/vp9_decoder.cc
diff --git a/media/gpu/vp9_decoder.cc b/media/gpu/vp9_decoder.cc
index b24f2466846e28485dd17b23372c2a57e0deb302..e7ad28c81c2a79050e87e249fb5d2c74aa22a0c2 100644
--- a/media/gpu/vp9_decoder.cc
+++ b/media/gpu/vp9_decoder.cc
@@ -99,7 +99,8 @@ VP9Decoder::DecodeResult VP9Decoder::Decode() {
         return kDecodeError;
       }
 
-      if (!accelerator_->OutputPicture(ref_frames_[frame_to_show])) {
+      if (!accelerator_->OutputPicture(ref_frames_[frame_to_show],
+                                       render_rect_)) {
         SetError();
         return kDecodeError;
       }
@@ -112,6 +113,22 @@ VP9Decoder::DecodeResult VP9Decoder::Decode() {
                            curr_frame_hdr_->frame_height);
     DCHECK(!new_pic_size.IsEmpty());
 
+    gfx::Rect new_render_rect;
+    // Due to specification render size should be set as not larger than frame
+    // size, or set as frame size if render_and_frame_size_different == 0. For
+    // safety we check the validity of render size or leave it as (0, 0).
+    if (curr_frame_hdr_->render_width > 0 &&

[Pawel Osciak, 2017/06/08 04:58:25]

Perhaps:

gfx::Rect new_render_rect(curr_frame_hdr_->render_width,
                          curr_frame_hdr_->render_height);
if (gfx::Rect(new_pic_size).Contains(new_render_rect))
  render_rect_ = new_render_rect;
else
  render_rect_ = gfx::Rect();

[johnylin1, 2017/06/12 13:41:53]

Done.

+        curr_frame_hdr_->render_width <= curr_frame_hdr_->frame_width &&
+        curr_frame_hdr_->render_height > 0 &&
+        curr_frame_hdr_->render_height <= curr_frame_hdr_->frame_height) {
+      new_render_rect.SetRect(0, 0, curr_frame_hdr_->render_width,
+                              curr_frame_hdr_->render_height);
+    }
+    if (new_render_rect != render_rect_) {
+      DVLOG(1) << "New render resolution: " << new_render_rect.ToString();
+      render_rect_ = new_render_rect;
+    }
+
     if (new_pic_size != pic_size_) {
       DVLOG(1) << "New resolution: " << new_pic_size.ToString();
 
@@ -187,7 +204,7 @@ bool VP9Decoder::DecodeAndOutputPicture(scoped_refptr<VP9Picture> pic) {
     return false;
 
   if (pic->frame_hdr->show_frame) {
-    if (!accelerator_->OutputPicture(pic))
+    if (!accelerator_->OutputPicture(pic, render_rect_))
       return false;
   }