66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
// Copyright (c) 2015 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/browser/api/frame_subscriber.h"
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#include "atom/common/node_includes.h"
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#include "base/bind.h"
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#include "media/base/video_frame.h"
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#include "media/base/yuv_convert.h"
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namespace atom {
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namespace api {
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FrameSubscriber::FrameSubscriber(v8::Isolate* isolate,
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const gfx::Size& size,
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const FrameCaptureCallback& callback)
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: isolate_(isolate), size_(size), callback_(callback) {
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}
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bool FrameSubscriber::ShouldCaptureFrame(
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const gfx::Rect& damage_rect,
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base::TimeTicks present_time,
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scoped_refptr<media::VideoFrame>* storage,
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DeliverFrameCallback* callback) {
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*storage = media::VideoFrame::CreateFrame(
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media::PIXEL_FORMAT_YV12,
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size_, gfx::Rect(size_), size_, base::TimeDelta());
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*callback = base::Bind(&FrameSubscriber::OnFrameDelivered,
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base::Unretained(this), *storage);
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return true;
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}
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void FrameSubscriber::OnFrameDelivered(
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scoped_refptr<media::VideoFrame> frame, base::TimeTicks, bool result) {
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if (!result)
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return;
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v8::Locker locker(isolate_);
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v8::HandleScope handle_scope(isolate_);
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gfx::Rect rect = frame->visible_rect();
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size_t rgb_arr_size = rect.width() * rect.height() * 4;
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v8::MaybeLocal<v8::Object> buffer = node::Buffer::New(isolate_, rgb_arr_size);
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if (buffer.IsEmpty())
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return;
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// Convert a frame of YUV to 32 bit ARGB.
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media::ConvertYUVToRGB32(frame->data(media::VideoFrame::kYPlane),
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frame->data(media::VideoFrame::kUPlane),
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frame->data(media::VideoFrame::kVPlane),
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reinterpret_cast<uint8*>(
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node::Buffer::Data(buffer.ToLocalChecked())),
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rect.width(), rect.height(),
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frame->stride(media::VideoFrame::kYPlane),
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frame->stride(media::VideoFrame::kUVPlane),
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rect.width() * 4,
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media::YV12);
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callback_.Run(buffer.ToLocalChecked());
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}
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} // namespace api
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} // namespace atom
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