mirror of
https://git.libcamera.org/libcamera/libcamera.git
synced 2025-07-13 07:19:45 +03:00
556e03fea7
There's no need to keep the video device open after allocating buffers, as V4L2 supports buffer orphaning and the exported buffers will still be usable. Close the device right after allocation to avoid the need for delayed cleanups. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
92 lines
2 KiB
C++
92 lines
2 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2020, Google Inc.
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*
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* A provider of external buffers, suitable for use in tests.
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*/
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#include "buffer_source.h"
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#include <iostream>
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#include <memory>
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#include "device_enumerator.h"
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#include "test.h"
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BufferSource::BufferSource()
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{
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}
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BufferSource::~BufferSource()
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{
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if (media_)
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media_->release();
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}
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int BufferSource::allocate(const StreamConfiguration &config)
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{
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/* Locate and open the video device. */
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std::string videoDeviceName = "vivid-000-vid-out";
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std::unique_ptr<DeviceEnumerator> enumerator =
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DeviceEnumerator::create();
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if (!enumerator) {
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std::cout << "Failed to create device enumerator" << std::endl;
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return TestFail;
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}
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if (enumerator->enumerate()) {
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std::cout << "Failed to enumerate media devices" << std::endl;
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return TestFail;
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}
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DeviceMatch dm("vivid");
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dm.add(videoDeviceName);
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media_ = enumerator->search(dm);
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if (!media_) {
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std::cout << "No vivid output device available" << std::endl;
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return TestSkip;
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}
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std::unique_ptr<V4L2VideoDevice> video{ V4L2VideoDevice::fromEntityName(media_.get(), videoDeviceName) };
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if (!video) {
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std::cout << "Failed to get video device from entity "
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<< videoDeviceName << std::endl;
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return TestFail;
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}
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if (video->open()) {
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std::cout << "Unable to open " << videoDeviceName << std::endl;
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return TestFail;
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}
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/* Configure the format. */
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V4L2DeviceFormat format;
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if (video->getFormat(&format)) {
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std::cout << "Failed to get format on output device" << std::endl;
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return TestFail;
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}
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format.size = config.size;
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format.fourcc = V4L2VideoDevice::toV4L2Fourcc(config.pixelFormat, false);
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if (video->setFormat(&format)) {
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std::cout << "Failed to set format on output device" << std::endl;
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return TestFail;
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}
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if (video->exportBuffers(config.bufferCount, &buffers_) < 0) {
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std::cout << "Failed to export buffers" << std::endl;
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return TestFail;
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}
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video->close();
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return TestPass;
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}
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const std::vector<std::unique_ptr<FrameBuffer>> &BufferSource::buffers()
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{
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return buffers_;
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}
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