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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/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. Each
// VideoCaptureBufferTracker carries indication of pixel format and storage
// type. This is a base class for implementations using different kinds of
// storage.
class CAPTURE_EXPORT VideoCaptureBufferTracker {
public:
VideoCaptureBufferTracker()
: max_pixel_count_(0),
held_by_producer_(false),
consumer_hold_count_(0),
frame_feedback_id_(0) {}
virtual bool Init(const gfx::Size& dimensions,
media::VideoPixelFormat format,
media::VideoPixelStorage storage_type) = 0;
virtual ~VideoCaptureBufferTracker(){};
const gfx::Size& dimensions() const { return dimensions_; }
void set_dimensions(const gfx::Size& dim) { dimensions_ = dim; }
size_t max_pixel_count() const { return max_pixel_count_; }
void set_max_pixel_count(size_t count) { max_pixel_count_ = count; }
media::VideoPixelFormat pixel_format() const { return pixel_format_; }
void set_pixel_format(media::VideoPixelFormat format) {
pixel_format_ = format;
}
media::VideoPixelStorage storage_type() const { return storage_type_; }
void set_storage_type(media::VideoPixelStorage storage_type) {
storage_type_ = storage_type;
}
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 std::unique_ptr<VideoCaptureBufferHandle> GetMemoryMappedAccess() = 0;
virtual mojo::ScopedSharedBufferHandle GetHandleForTransit(
bool read_only) = 0;
virtual base::SharedMemoryHandle
GetNonOwnedSharedMemoryHandleForLegacyIPC() = 0;
private:
// |dimensions_| may change as a VideoCaptureBufferTracker is re-used, but
// |max_pixel_count_|, |pixel_format_|, and |storage_type_| are set once for
// the lifetime of a VideoCaptureBufferTracker.
gfx::Size dimensions_;
size_t max_pixel_count_;
media::VideoPixelFormat pixel_format_;
media::VideoPixelStorage storage_type_;
// 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_