chromium/third_party/blink/renderer/modules/mediacapturefromelement/canvas_capture_handler.h

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIACAPTUREFROMELEMENT_CANVAS_CAPTURE_HANDLER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIACAPTUREFROMELEMENT_CANVAS_CAPTURE_HANDLER_H_

#include <stddef.h>
#include <stdint.h>

#include <memory>
#include <optional>

#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "gpu/GLES2/gl2extchromium.h"
#include "media/base/video_frame_pool.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/video_capture/video_capturer_source.h"
#include "third_party/skia/include/core/SkImageInfo.h"
#include "third_party/skia/include/gpu/GrTypes.h"

class SkImage;

namespace base {
class ScopedClosureRunner;
}  // namespace base

namespace gfx {
class Size;
}  // namespace gfx

namespace blink {

class LocalFrame;
class MediaStreamComponent;

// CanvasCaptureHandler acts as the link between Blink side HTMLCanvasElement
// and Chrome side VideoCapturerSource. It is responsible for handling
// SkImage instances sent from the Blink side, convert them to
// media::VideoFrame and plug them to the MediaStreamTrack.
// CanvasCaptureHandler instance is owned by a blink::CanvasDrawListener which
// is owned by a CanvasCaptureMediaStreamTrack.
// All methods are called on the same thread as construction and destruction,
// i.e. the Main Render thread. Note that a CanvasCaptureHandlerDelegate is
// used to send back frames to |io_task_runner_|, i.e. IO thread.
class MODULES_EXPORT CanvasCaptureHandler { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIACAPTUREFROMELEMENT_CANVAS_CAPTURE_HANDLER_H_