Changing UpdateStreamPacket protobuf definition for chromoting

remoting/client/decoder_verbatim.cc

Index: remoting/client/decoder_verbatim.cc
diff --git a/remoting/client/decoder_verbatim.cc b/remoting/client/decoder_verbatim.cc
index e9b88efdef4a5f16b44e7d122251267c90cb0d42..d27d265acbe6e694567eba1a7c44d37e831504d1 100644
--- a/remoting/client/decoder_verbatim.cc
+++ b/remoting/client/decoder_verbatim.cc
@@ -9,7 +9,13 @@
 namespace remoting {
 
 DecoderVerbatim::DecoderVerbatim()
-    : updated_rects_(NULL),
+    : state_(kWaitingForBeginRect),
+      rect_x_(0),
+      rect_y_(0),
+      rect_width_(0),
+      rect_height_(0),
+      bytes_per_pixel_(0),
+      updated_rects_(NULL),
       reverse_rows_(true) {
 }
 
@@ -20,6 +26,7 @@ bool DecoderVerbatim::BeginDecode(scoped_refptr<media::VideoFrame> frame,
   DCHECK(!partial_decode_done_.get());
   DCHECK(!decode_done_.get());
   DCHECK(!updated_rects_);
+  DCHECK_EQ(kWaitingForBeginRect, state_);
 
   partial_decode_done_.reset(partial_decode_done);
   decode_done_.reset(decode_done);
@@ -33,54 +40,88 @@ bool DecoderVerbatim::BeginDecode(scoped_refptr<media::VideoFrame> frame,
 
 bool DecoderVerbatim::PartialDecode(HostMessage* message) {
   scoped_ptr<HostMessage> msg_deleter(message);
+  DCHECK(message->has_update_stream_packet());
+
+  bool ret = true;
+  if (message->update_stream_packet().has_begin_rect())
+    ret = HandleBeginRect(message);
+  if (ret && message->update_stream_packet().has_rect_data())
+    ret = HandleRectData(message);
+  if (ret && message->update_stream_packet().has_end_rect())
+    ret = HandleEndRect(message);
+  return ret;
+}
+
+void DecoderVerbatim::EndDecode() {
+  DCHECK_EQ(kWaitingForBeginRect, state_);
+  decode_done_->Run();
+
+  partial_decode_done_.reset();
+  decode_done_.reset();
+  frame_ = NULL;
+  updated_rects_ = NULL;
+}
+
+bool DecoderVerbatim::HandleBeginRect(HostMessage* message) {
+  DCHECK_EQ(kWaitingForBeginRect, state_);
+  state_ = kWaitingForRectData;
+
+  rect_width_ = message->update_stream_packet().begin_rect().width();
+  rect_height_ = message->update_stream_packet().begin_rect().height();
+  rect_x_ = message->update_stream_packet().begin_rect().x();
+  rect_y_ = message->update_stream_packet().begin_rect().y();
 
-  int width = message->update_stream_packet().header().width();
-  int height = message->update_stream_packet().header().height();
-  int x = message->update_stream_packet().header().x();
-  int y = message->update_stream_packet().header().y();
   PixelFormat pixel_format =
-      message->update_stream_packet().header().pixel_format();
+      message->update_stream_packet().begin_rect().pixel_format();
 
   if (static_cast<PixelFormat>(frame_->format()) != pixel_format) {
     NOTREACHED() << "Pixel format of message doesn't match the video frame. "
                     "Expected vs received = "
                  << frame_->format() << " vs " << pixel_format
                  << " Color space conversion required.";
+    return false;
   }
 
-  int bytes_per_pixel = GetBytesPerPixel(pixel_format);
+  bytes_per_pixel_ = GetBytesPerPixel(pixel_format);
+  return true;
+}
+
+bool DecoderVerbatim::HandleRectData(HostMessage* message) {
+  DCHECK_EQ(kWaitingForRectData, state_);
+  DCHECK_EQ(0,
+            message->update_stream_packet().rect_data().sequence_number());
+
   // Copy the data line by line.
-  const int src_stride = bytes_per_pixel * width;
-  const char* src = message->update_stream_packet().data().c_str();
+  const int src_stride = bytes_per_pixel_ * rect_width_;
+  const char* src =
+      message->update_stream_packet().rect_data().data().c_str();
   int src_stride_dir = src_stride;
   if (reverse_rows_) {
     // Copy rows from bottom to top to flip the image vertically.
-    src += (height - 1) * src_stride;
+    src += (rect_height_ - 1) * src_stride;
     // Change the direction of the stride to work bottom to top.
     src_stride_dir *= -1;
   }
   const int dest_stride = frame_->stride(media::VideoFrame::kRGBPlane);
   uint8* dest = frame_->data(media::VideoFrame::kRGBPlane) +
-      dest_stride * y + bytes_per_pixel * x;
-  for (int i = 0; i < height; ++i) {
+      dest_stride * rect_y_ + bytes_per_pixel_ * rect_x_;
+  for (int i = 0; i < rect_height_; ++i) {
     memcpy(dest, src, src_stride);
     dest += dest_stride;
     src += src_stride_dir;
   }
 
   updated_rects_->clear();
-  updated_rects_->push_back(gfx::Rect(x, y, width, height));
+  updated_rects_->push_back(gfx::Rect(rect_x_, rect_y_,
+                                      rect_width_, rect_height_));
   partial_decode_done_->Run();
   return true;
 }
 
-void DecoderVerbatim::EndDecode() {
-  decode_done_->Run();
-
-  partial_decode_done_.reset();
-  decode_done_.reset();
-  frame_ = NULL;
-  updated_rects_ = NULL;
+bool DecoderVerbatim::HandleEndRect(HostMessage* message) {
+  DCHECK_EQ(kWaitingForRectData, state_);
+  state_ = kWaitingForBeginRect;
+  return true;
 }
 
 }  // namespace remoting