Cast: Adding support for GPU accelerated encode

media/cast/video_sender/codecs/vp8/vp8_encoder.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.
 //
 // TODO (pwestin): add a link to the design document describing the generic
 // protocol and the VP8 specific details.
 #include "media/cast/video_sender/codecs/vp8/vp8_encoder.h"
 
 #include <vector>
 
@@ skipping 129 matching lines @@
   raw_image_->stride[VPX_PLANE_Y] = video_frame->stride(VideoFrame::kYPlane);
   raw_image_->stride[VPX_PLANE_U] = video_frame->stride(VideoFrame::kUPlane);
   raw_image_->stride[VPX_PLANE_V] = video_frame->stride(VideoFrame::kVPlane);
 
   uint8 latest_frame_id_to_reference;
   Vp8Buffers buffer_to_update;
   vpx_codec_flags_t flags = 0;
   if (key_frame_requested_) {
     flags = VPX_EFLAG_FORCE_KF;
     // Self reference.
-    latest_frame_id_to_reference =
-        static_cast<uint8>(last_encoded_frame_id_ + 1);
+    latest_frame_id_to_reference = last_encoded_frame_id_ + 1;
     // We can pick any buffer as buffer_to_update since we update
     // them all.
     buffer_to_update = kLastBuffer;
   } else {
     // Reference all acked frames (buffers).
     latest_frame_id_to_reference = GetLatestFrameIdToReference();
     GetCodecReferenceFlags(&flags);
     buffer_to_update = GetNextBufferToUpdate();
     GetCodecUpdateFlags(buffer_to_update, &flags);
   }
@@ skipping 210 matching lines @@
   float scale_parameter = 0.5;
   uint32 target_pct = optimal_buffer_size_ms * scale_parameter *
       cast_config_.max_frame_rate / 10;
 
   // Don't go below 3 times the per frame bandwidth.
   return std::max(target_pct, kMinIntra);
 }
 
 }  // namespace cast
 }  // namespace media