[Cast] Software encoder support for varying video frame sizes.

media/cast/test/linux_output_window.cc

 // 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.
 
 #include "media/cast/test/linux_output_window.h"
 
+#include <algorithm>
+
 #include "base/logging.h"
 #include "media/base/video_frame.h"
 #include "third_party/libyuv/include/libyuv/convert.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace media {
 namespace cast {
 namespace test {
 
 LinuxOutputWindow::LinuxOutputWindow(int x_pos,
@@ skipping 94 matching lines @@
   // Attach image to display.
   if (!XShmAttach(display_, &shminfo_)) {
     VLOG(1) << "XShmAttach failed";
     NOTREACHED();
   }
   XSync(display_, false);
 }
 
 void LinuxOutputWindow::RenderFrame(
     const scoped_refptr<media::VideoFrame>& video_frame) {
-  CHECK_LE(video_frame->coded_size().width(), image_->width);
-  CHECK_LE(video_frame->coded_size().height(), image_->height);
-  libyuv::I420ToARGB(video_frame->data(VideoFrame::kYPlane),
-                     video_frame->stride(VideoFrame::kYPlane),
-                     video_frame->data(VideoFrame::kUPlane),
-                     video_frame->stride(VideoFrame::kUPlane),
-                     video_frame->data(VideoFrame::kVPlane),
-                     video_frame->stride(VideoFrame::kVPlane),
-                     reinterpret_cast<uint8_t*>(image_->data),
-                     image_->bytes_per_line,
-                     video_frame->coded_size().width(),
-                     video_frame->coded_size().height());
+  const gfx::Size damage_size(std::min(video_frame->visible_rect().width(),
+                                       image_->width),
+                              std::min(video_frame->visible_rect().height(),
+                                       image_->height));
+
+  if (damage_size.width() < image_->width ||
+      damage_size.height() < image_->height)
+    memset(image_->data, 0x00, image_->bytes_per_line * image_->height);
+
+  if (!damage_size.IsEmpty()) {
+    libyuv::I420ToARGB(video_frame->visible_data(VideoFrame::kYPlane),
+                       video_frame->stride(VideoFrame::kYPlane),
+                       video_frame->visible_data(VideoFrame::kUPlane),
+                       video_frame->stride(VideoFrame::kUPlane),
+                       video_frame->visible_data(VideoFrame::kVPlane),
+                       video_frame->stride(VideoFrame::kVPlane),
+                       reinterpret_cast<uint8_t*>(image_->data),
+                       image_->bytes_per_line,
+                       damage_size.width(),
+                       damage_size.height());
+  }
 
   // Place image in window.
   XShmPutImage(display_,
                window_,
                gc_,
                image_,
                0,
                0,
                0,
                0,
-               video_frame->coded_size().width(),
-               video_frame->coded_size().height(),
+               image_->width,
+               image_->height,
                true);
 
   // Very important for the image to update properly!
   XSync(display_, false);
 }
 
 }  // namespace test
 }  // namespace cast
 }  // namespace media