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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_BUFFER_TRACKER_H_
#define MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_BUFFER_TRACKER_H_
#include <memory>
#include "base/synchronization/lock.h"
#include "media/capture/mojom/video_capture_types.mojom.h"
#include "media/capture/video/video_capture_buffer_handle.h"
#include "media/capture/video_capture_types.h"
#include "mojo/public/cpp/system/buffer.h"
namespace media {
// Keeps track of the state of a given mappable resource. This is a base class
// for implementations using different kinds of storage.
class CAPTURE_EXPORT VideoCaptureBufferTracker {
public:
VideoCaptureBufferTracker()
: held_by_producer_(false),
consumer_hold_count_(0),
frame_feedback_id_(0) {}
virtual bool Init(const gfx::Size& dimensions,
VideoPixelFormat format,
const mojom::PlaneStridesPtr& strides) = 0;
virtual ~VideoCaptureBufferTracker(){};
bool held_by_producer() const { return held_by_producer_; }
void set_held_by_producer(bool value) { held_by_producer_ = value; }
int consumer_hold_count() const { return consumer_hold_count_; }
void set_consumer_hold_count(int value) { consumer_hold_count_ = value; }
void set_frame_feedback_id(int value) { frame_feedback_id_ = value; }
int frame_feedback_id() { return frame_feedback_id_; }
virtual bool IsReusableForFormat(const gfx::Size& dimensions,
VideoPixelFormat format,
const mojom::PlaneStridesPtr& strides) = 0;
virtual uint32_t GetMemorySizeInBytes() = 0;
virtual std::unique_ptr<VideoCaptureBufferHandle> GetMemoryMappedAccess() = 0;
virtual mojo::ScopedSharedBufferHandle GetHandleForTransit(
bool read_only) = 0;
virtual base::SharedMemoryHandle
GetNonOwnedSharedMemoryHandleForLegacyIPC() = 0;
private:
// Indicates whether this VideoCaptureBufferTracker is currently referenced by
// the producer.
bool held_by_producer_;
// Number of consumer processes which hold this VideoCaptureBufferTracker.
int consumer_hold_count_;
int frame_feedback_id_;
};
} // namespace content
#endif // MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_BUFFER_TRACKER_H_