src/android/camera_stream.h


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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 <condition_variable>
#include <memory>
#include <mutex>
#include <queue>
#include <vector>

#include <hardware/camera3.h>

#include <libcamera/base/thread.h>

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

#include "camera_request.h"
#include "post_processor.h"

class CameraDevice;

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:
	 *