ppapi: Change endianness in libyuv calls, from BGRA to ARGB

content/renderer/pepper/pepper_video_source_host.cc

 // Copyright (c) 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 "content/renderer/pepper/pepper_video_source_host.h"
 
 #include "base/bind.h"
 #include "base/numerics/safe_conversions.h"
 #include "content/public/renderer/renderer_ppapi_host.h"
 #include "content/renderer/pepper/ppb_image_data_impl.h"
@@ skipping 164 matching lines @@
   const int vert_crop = frame->visible_rect().y();
 
   const uint8* src_y = frame->data(media::VideoFrame::kYPlane) +
                        (src_width * vert_crop + horiz_crop);
   const int center = (src_width + 1) / 2;
   const uint8* src_u = frame->data(media::VideoFrame::kUPlane) +
                        (center * vert_crop + horiz_crop) / 2;
   const uint8* src_v = frame->data(media::VideoFrame::kVPlane) +
                        (center * vert_crop + horiz_crop) / 2;
 
-  libyuv::I420ToBGRA(src_y,
+  libyuv::I420ToARGB(src_y,
                      frame->stride(media::VideoFrame::kYPlane),
                      src_u,
                      frame->stride(media::VideoFrame::kUPlane),
                      src_v,
                      frame->stride(media::VideoFrame::kVPlane),
                      bitmap_pixels,
                      bitmap->rowBytes(),
                      dst_width,
                      dst_height);
+  // Give an imperceptible hint about endianness in the first pixel. The alpha
+  // channel is always 255, if B is 255 as well, change it to 254.
+  if (bitmap_pixels[0] == 255)
+    bitmap_pixels[0] = 254;
 
   ppapi::HostResource host_resource;
   host_resource.SetHostResource(pp_instance(), resource.get());
 
   // Convert a video timestamp to a PP_TimeTicks (a double, in seconds).
   PP_TimeTicks timestamp = frame->timestamp().InSecondsF();
 
   ppapi::proxy::SerializedHandle serialized_handle;
   serialized_handle.set_shmem(image_handle, byte_count);
   reply_context_.params.AppendHandle(serialized_handle);
@@ skipping 19 matching lines @@
 
 void PepperVideoSourceHost::Close() {
   if (source_handler_.get() && !stream_url_.empty())
     source_handler_->Close(frame_receiver_.get());
 
   source_handler_.reset(NULL);
   stream_url_.clear();
 }
 
 }  // namespace content