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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* libcamera V4L2 API tests
*
* Validate the function of exporting buffers from a V4L2VideoDevice and
* the ability to import them to another V4L2VideoDevice instance.
* Ensure that the Buffers can successfully be queued and dequeued
* between both devices.
*/
#include <iostream>
#include <libcamera/framebuffer.h>
#include <libcamera/base/event_dispatcher.h>
#include <libcamera/base/thread.h>
#include <libcamera/base/timer.h>
#include "v4l2_videodevice_test.h"
using namespace libcamera;
using namespace std::chrono_literals;
class BufferSharingTest : public V4L2VideoDeviceTest
{
public:
BufferSharingTest()
: V4L2VideoDeviceTest("vivid", "vivid-000-vid-cap"),
output_(nullptr), framesCaptured_(0), framesOutput_(0) {}
protected:
int init()
{
int ret = V4L2VideoDeviceTest::init();
if (ret)
return ret;
/* media_ already represents VIVID */
MediaEntity *entity = media_->getEntityByName("vivid-000-vid-out");
if (!entity)
return TestSkip;
output_ = new V4L2VideoDevice(entity);
if (!output_) {
std::cout << "Failed to create output device" << std::endl;
return TestFail;
}
ret = output_->open();
if (ret) {
std::cout << "Failed to open output device" << std::endl;
return TestFail;
}
V4L2DeviceFormat format = {};
ret = capture_->getFormat(&format);
if (ret) {
std::cout << "Failed to get capture format" << std::endl;
return TestFail;
}
format.size.width = 320;
format.size.height = 180;
ret = capture_->setFormat(&format);
if (ret) {
std::cout << "Failed to set capture format" << std::endl;
return TestFail;
}
ret = output_->setFormat(&format);
if (ret) {
std::cout << "Failed to set output format" << std::endl;
return TestFail;
}
ret = capture_->allocateBuffers(bufferCount, &buffers_);
if (ret < 0) {
std::cout << "Failed to allocate buffers" << std::endl;
return TestFail;
}
ret = output_->importBuffers(bufferCount);
if (ret < 0) {
std::cout << "Failed to import buffers" << std::endl;
return TestFail;
}
return 0;
}
void captureBufferReady(FrameBuffer *buffer)
{
const FrameMetadata &metadata = buffer->metadata();
std::cout << "Received capture buffer" << std::endl;
if (metadata.status != FrameMetadata::FrameSuccess)
return;
output_->queueBuffer(buffer);
framesCaptured_++;
}
void outputBufferReady(FrameBuffer *buffer)
{
const FrameMetadata &metadata = buffer->metadata();
std::cout << "Received output buffer" << std::endl;
if (metadata.status != FrameMetadata::FrameSuccess)
return;
capture_->queueBuffer(buffer);
framesOutput_++;
}
int run()
{
EventDispatcher *dispatcher = Thread::current()->eventDispatcher();
Timer timeout;
int ret;
capture_->bufferReady.connect(this, &BufferSharingTest::captureBufferReady);
output_->bufferReady.connect(this, &BufferSharingTest::outputBufferReady);
for (const std::unique_ptr<FrameBuffer> &buffer : buffers_) {
if (capture_->queueBuffer(buffer.get())) {
std::cout << "Failed to queue buffer" << std::endl;
return TestFail;
}
}
ret = capture_->streamOn();
if (ret) {
std::cout << "Failed to start streaming on the capture device" << std::endl;
return TestFail;
}
ret = output_->streamOn();
if (ret) {
std::cout << "Failed to start streaming on the output device" << std::endl;
return TestFail;
}
timeout.start(10000ms);
while (timeout.isRunning()) {
dispatcher->processEvents();
if (framesCaptured_ > 30 && framesOutput_ > 30)
break;
}
if ((framesCaptured_ < 1) || (framesOutput_ < 1)) {
std::cout << "Failed to process any frames within timeout." << std::endl;
return TestFail;
}
if ((framesCaptured_ < 30) || (framesOutput_ < 30)) {
std::cout << "Failed to process 30 frames within timeout." << std::endl;
return TestFail;
}
ret = capture_->streamOff();
if (ret) {
std::cout << "Failed to stop streaming on the capture device" << std::endl;
return TestFail;
}
ret = output_->streamOff();
if (ret) {
std::cout << "Failed to stop streaming on the output device" << std::endl;
return TestFail;
}
return TestPass;
}
void cleanup()
{
std::cout
<< "Captured " << framesCaptured_ << " frames and "
<< "output " << framesOutput_ << " frames"
<< std::endl;
output_->streamOff();
output_->releaseBuffers();
output_->close();
delete output_;
V4L2VideoDeviceTest::cleanup();
}
private:
const unsigned int bufferCount = 4;
V4L2VideoDevice *output_;
unsigned int framesCaptured_;
unsigned int framesOutput_;
};
TEST_REGISTER(BufferSharingTest)
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