content/renderer/media/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 "content/renderer/media/video_frame_compositor.h"
   6
   7 #include "media/base/video_frame.h"
   8
   9 namespace content {
  10
  11 static bool IsOpaque(const scoped_refptr<media::VideoFrame>& frame) {
  12   switch (frame->format()) {
  13     case media::VideoFrame::UNKNOWN:
  14     case media::VideoFrame::YV12:
  15     case media::VideoFrame::YV12J:
  16     case media::VideoFrame::YV16:
  17     case media::VideoFrame::I420:
  18     case media::VideoFrame::YV24:
  19     case media::VideoFrame::NV12:
  20       return true;
  21
  22     case media::VideoFrame::YV12A:
  23 #if defined(VIDEO_HOLE)
  24     case media::VideoFrame::HOLE:
  25 #endif  // defined(VIDEO_HOLE)
  26     case media::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<media::VideoFrame> VideoFrameCompositor::GetCurrentFrame() {
  53   return current_frame_;
  54 }
  55
  56 void VideoFrameCompositor::PutCurrentFrame(
  57     const scoped_refptr<media::VideoFrame>& frame) {
  58 }
  59
  60 void VideoFrameCompositor::UpdateCurrentFrame(
  61     const scoped_refptr<media::VideoFrame>& frame) {
  62   if (current_frame_ &&
  63       current_frame_->natural_size() != frame->natural_size()) {
  64     natural_size_changed_cb_.Run(frame->natural_size());
  65   }
  66
  67   if (!current_frame_ || 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 content