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

media/gpu/h264_decoder.h

 // Copyright (c) 2012 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.
 
 #ifndef MEDIA_GPU_H264_DECODER_H_
 #define MEDIA_GPU_H264_DECODER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 91 matching lines @@
 
   H264Decoder(H264Accelerator* accelerator);
   ~H264Decoder() override;
 
   // AcceleratedVideoDecoder implementation.
   bool Flush() override WARN_UNUSED_RESULT;
   void Reset() override;
   void SetStream(const uint8_t* ptr, size_t size) override;
   DecodeResult Decode() override WARN_UNUSED_RESULT;
   gfx::Size GetPicSize() const override;
+  gfx::Rect GetVisibleRect() const override;
   size_t GetRequiredNumOfPictures() const override;
 
  private:
   // We need to keep at most kDPBMaxSize pictures in DPB for
   // reference/to display later and an additional one for the one currently
   // being decoded. We also ask for some additional ones since VDA needs
   // to accumulate a few ready-to-output pictures before it actually starts
   // displaying and giving them back. +2 instead of +1 because of subjective
   // smoothness improvement during testing.
   enum {
@@ skipping 137 matching lines @@
   // Currently active SPS and PPS.
   int curr_sps_id_;
   int curr_pps_id_;
 
   // Current NALU and slice header being processed.
   std::unique_ptr<H264NALU> curr_nalu_;
   std::unique_ptr<H264SliceHeader> curr_slice_hdr_;
 
   // Output picture size.
   gfx::Size pic_size_;
+  // Output visible cropping rect.
+  gfx::Rect visible_rect_;
 
   // PicOrderCount of the previously outputted frame.
   int last_output_poc_;
 
   H264Accelerator* accelerator_;
 
   DISALLOW_COPY_AND_ASSIGN(H264Decoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_H264_DECODER_H_