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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-09-06 01:35:22 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-09-07 19:18:51 +0300
commita13676f2bb9a86ced75ed640f571512cf1a76afe (patch)
treeda0bfea97abec2b03c4feca663dd1f0304230055 /src/qcam/assets/feathericons/truck.svg
parent013084310836519b57883176d65fb5e9f6c00f8d (diff)
qcam: Use Image class to access pixel data
Replace the manual implementation of frame buffer mapping with the Image class to improve code sharing. The ViewFinder API is updated to take an Image pointer in the render() function to prepare for multi-planar buffer support. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src/qcam/assets/feathericons/truck.svg')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.1 (git 2.18.0) at 2025-01-02 11:03:12 +0000
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * viewfinder.cpp - qcam - Viewfinder
 */

#include "viewfinder.h"

#include <stdint.h>
#include <utility>

#include <QImage>
#include <QImageWriter>
#include <QMap>
#include <QMutexLocker>
#include <QPainter>
#include <QtDebug>

#include "format_converter.h"

static const QMap<libcamera::PixelFormat, QImage::Format> nativeFormats
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
	{ libcamera::PixelFormat{ DRM_FORMAT_ABGR8888 }, QImage::Format_RGBA8888 },
#endif
	{ libcamera::PixelFormat{ DRM_FORMAT_ARGB8888 }, QImage::Format_RGB32 },
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
	{ libcamera::PixelFormat{ DRM_FORMAT_BGR888 }, QImage::Format_BGR888 },
#endif
	{ libcamera::PixelFormat{ DRM_FORMAT_RGB888 }, QImage::Format_RGB888 },
};

ViewFinder::ViewFinder(QWidget *parent)
	: QWidget(parent), buffer_(nullptr)
{
	icon_ = QIcon(":camera-off.svg");
}

ViewFinder::~ViewFinder()
{
}

const QList<libcamera::PixelFormat> &ViewFinder::nativeFormats() const
{
	static const QList<libcamera::PixelFormat> formats = ::nativeFormats.keys();
	return formats;
}

int ViewFinder::setFormat(const libcamera::PixelFormat &format,
			  const QSize &size)
{
	image_ = QImage();

	/*
	 * If format conversion is needed, configure the converter and allocate
	 * the destination image.
	 */
	if (!::nativeFormats.contains(format)) {
		int ret = converter_.configure(format, size);
		if (ret < 0)
			return ret;

		image_ = QImage(size, QImage::Format_RGB32);

		qInfo() << "Using software format conversion from"
			<< format.toString().c_str();
	} else {
		qInfo() << "Zero-copy enabled";
	}

	format_ = format;
	size_ = size;

	updateGeometry();
	return 0;
}

void ViewFinder::render(libcamera::FrameBuffer *buffer, MappedBuffer *map)
{
	if (buffer->planes().size() != 1) {
		qWarning() << "Multi-planar buffers are not supported";
		return;
	}

	unsigned char *memory = static_cast<unsigned char *>(map->memory);
	size_t size = buffer->metadata().planes[0].bytesused;

	{
		QMutexLocker locker(&mutex_);

		if (::nativeFormats.contains(format_)) {
			/*
			 * If the frame format is identical to the display
			 * format, create a QImage that references the frame
			 * and store a reference to the frame buffer. The
			 * previously stored frame buffer, if any, will be
			 * released.
			 *