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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "media/blink/video_frame_compositor.h"
      6 
      7 #include "media/base/video_frame.h"
      8 
      9 namespace media {
     10 
     11 static bool IsOpaque(const scoped_refptr<VideoFrame>& frame) {
     12   switch (frame->format()) {
     13     case VideoFrame::UNKNOWN:
     14     case VideoFrame::YV12:
     15     case VideoFrame::YV12J:
     16     case VideoFrame::YV16:
     17     case VideoFrame::I420:
     18     case VideoFrame::YV24:
     19     case VideoFrame::NV12:
     20       return true;
     21 
     22     case VideoFrame::YV12A:
     23 #if defined(VIDEO_HOLE)
     24     case VideoFrame::HOLE:
     25 #endif  // defined(VIDEO_HOLE)
     26     case VideoFrame::NATIVE_TEXTURE:
     27       break;
     28   }
     29   return false;
     30 }
     31 
     32 VideoFrameCompositor::VideoFrameCompositor(
     33     const base::Callback<void(gfx::Size)>& natural_size_changed_cb,
     34     const base::Callback<void(bool)>& opacity_changed_cb)
     35     : natural_size_changed_cb_(natural_size_changed_cb),
     36       opacity_changed_cb_(opacity_changed_cb),
     37       client_(NULL) {
     38 }
     39 
     40 VideoFrameCompositor::~VideoFrameCompositor() {
     41   if (client_)
     42     client_->StopUsingProvider();
     43 }
     44 
     45 void VideoFrameCompositor::SetVideoFrameProviderClient(
     46     cc::VideoFrameProvider::Client* client) {
     47   if (client_)
     48     client_->StopUsingProvider();
     49   client_ = client;
     50 }
     51 
     52 scoped_refptr<VideoFrame> VideoFrameCompositor::GetCurrentFrame() {
     53   return current_frame_;
     54 }
     55 
     56 void VideoFrameCompositor::PutCurrentFrame(
     57     const scoped_refptr<VideoFrame>& frame) {
     58 }
     59 
     60 void VideoFrameCompositor::UpdateCurrentFrame(
     61     const scoped_refptr<VideoFrame>& frame) {
     62   if (current_frame_.get() &&
     63       current_frame_->natural_size() != frame->natural_size()) {
     64     natural_size_changed_cb_.Run(frame->natural_size());
     65   }
     66 
     67   if (!current_frame_.get() || IsOpaque(current_frame_) != IsOpaque(frame)) {
     68     opacity_changed_cb_.Run(IsOpaque(frame));
     69   }
     70 
     71   current_frame_ = frame;
     72 
     73   if (client_)
     74     client_->DidReceiveFrame();
     75 }
     76 
     77 }  // namespace media
     78