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/* 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 <hardware/camera3.h>
#include <libcamera/camera.h>
#include <libcamera/geometry.h>
#include <libcamera/pixel_format.h>
class CameraDevice;
class Encoder;
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:
*
* The Android stream is directly mapped onto a libcamera stream: frames
* are delivered by the library directly in the memory location
* specified by the Android stream (buffer_handle_t->data) and provided
* to the framework as they are. The Android stream characteristics are
* directly translated to the libcamera stream configuration.
*
* +-----+ +-----+
* | A | | L |
* +-----+ +-----+
* | |
* V V
* +-----+ +------+
* | B |<---------------| FB |
* +-----+ +------+
*
*
* Internal:
*
* Data for the Android stream is produced by processing a libcamera
* stream created by the HAL for that purpose. The libcamera stream
* needs to be supplied with intermediate buffers where the library
* delivers frames to be processed and then provided to the framework.
* The libcamera stream configuration is not a direct translation of the
* Android stream characteristics, but it describes the format and size
* required for the processing procedure to produce frames in the
* Android required format.
*
* +-----+ +-----+
* | A | | L |
* +-----+ +-----+
* | |
* V V
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