media/blink/video_frame_compositor.cc

   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::YV12HD:
  17     case VideoFrame::YV16:
  18     case VideoFrame::I420:
  19     case VideoFrame::YV24:
  20     case VideoFrame::NV12:
  21       return true;
  22
  23     case VideoFrame::YV12A:
  24 #if defined(VIDEO_HOLE)
  25     case VideoFrame::HOLE:
  26 #endif  // defined(VIDEO_HOLE)
  27     case VideoFrame::NATIVE_TEXTURE:
  28     case VideoFrame::ARGB:
  29       break;
  30   }
  31   return false;
  32 }
  33
  34 VideoFrameCompositor::VideoFrameCompositor(
  35     const base::Callback<void(gfx::Size)>& natural_size_changed_cb,
  36     const base::Callback<void(bool)>& opacity_changed_cb)
  37     : natural_size_changed_cb_(natural_size_changed_cb),
  38       opacity_changed_cb_(opacity_changed_cb),
  39       client_(NULL) {
  40 }
  41
  42 VideoFrameCompositor::~VideoFrameCompositor() {
  43   if (client_)
  44     client_->StopUsingProvider();
  45 }
  46
  47 void VideoFrameCompositor::SetVideoFrameProviderClient(
  48     cc::VideoFrameProvider::Client* client) {
  49   if (client_)
  50     client_->StopUsingProvider();
  51   client_ = client;
  52 }
  53
  54 scoped_refptr<VideoFrame> VideoFrameCompositor::GetCurrentFrame() {
  55   return current_frame_;
  56 }
  57
  58 void VideoFrameCompositor::PutCurrentFrame(
  59     const scoped_refptr<VideoFrame>& frame) {
  60 }
  61
  62 void VideoFrameCompositor::UpdateCurrentFrame(
  63     const scoped_refptr<VideoFrame>& frame) {
  64   if (current_frame_.get() &&
  65       current_frame_->natural_size() != frame->natural_size()) {
  66     natural_size_changed_cb_.Run(frame->natural_size());
  67   }
  68
  69   if (!current_frame_.get() || IsOpaque(current_frame_) != IsOpaque(frame)) {
  70     opacity_changed_cb_.Run(IsOpaque(frame));
  71   }
  72
  73   current_frame_ = frame;
  74
  75   if (client_)
  76     client_->DidReceiveFrame();
  77 }
  78
  79 }  // namespace media