/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2020, Google Inc.
 *
 * camera_stream.h - Camera HAL stream
 */
#ifndef __ANDROID_CAMERA_STREAM_H__
#define __ANDROID_CAMERA_STREAM_H__

#include <memory>
#include <mutex>
#include <vector>

#include <hardware/camera3.h>

#include <libcamera/buffer.h>
#include <libcamera/camera.h>
#include <libcamera/framebuffer_allocator.h>
#include <libcamera/geometry.h>
#include <libcamera/pixel_format.h>

class Encoder;
class CameraDevice;
class CameraMetadata;
class MappedCamera3Buffer;

class CameraStream
{
public:
	/*
	 * Enumeration of CameraStream types.
	 *
	 * A camera stream associates an Android stream to a libcamera stream.
	 * This enumeration describes how the two streams are associated and how
	 * and where data produced from libcamera are delivered to the
	 * Android framework.
	 *
	 * Direct:
	 * |  A  |      |  A' |          |  L  |
	 * +-----+      +-----+          +-----+
	 *    |            |                |
	 *    V            V                V
	 * +-----+      +-----+          +------+
	 * |  B  |      |  B' |<---------|  FB  |
	 * +-----+      +-----+          +------+
	 *   ^              |
	 *   |--Processing--|
	 *
	 *
	 * --------------------------------------------------------------------
	 * A  = Android stream
	 * L  = libcamera stream
	 * B  = memory buffer
	 * FB = libcam
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