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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2020, Google Inc.
*
* simple_capture.cpp - Simple capture helper
*/
#include "simple_capture.h"
using namespace libcamera;
SimpleCapture::SimpleCapture(std::shared_ptr<Camera> camera)
: camera_(camera), allocator_(std::make_unique<FrameBufferAllocator>(camera))
{
}
SimpleCapture::~SimpleCapture()
{
}
Results::Result SimpleCapture::configure(StreamRole role)
{
config_ = camera_->generateConfiguration({ role });
if (config_->validate() != CameraConfiguration::Valid) {
config_.reset();
return { Results::Fail, "Configuration not valid" };
}
if (camera_->configure(config_.get())) {
config_.reset();
return { Results::Fail, "Failed to configure camera" };
}
return { Results::Pass, "Configure camera" };
}
Results::Result SimpleCapture::start()
{
Stream *stream = config_->at(0).stream();
if (allocator_->allocate(stream) < 0)
return { Results::Fail, "Failed to allocate buffers" };
if (camera_->start())
return { Results::Fail, "Failed to start camera" };
camera_->requestCompleted.connect(this, &SimpleCapture::requestComplete);
return { Results::Pass, "Started camera" };
}
Results::Result SimpleCapture::stop()
{
Stream *stream = config_->at(0).stream();
camera_->stop();
camera_->requestCompleted.disconnect(this, &SimpleCapture::requestComplete);
allocator_->free(stream);
return { Results::Pass, "Stopped camera" };
}
/* SimpleCaptureBalanced */
SimpleCaptureBalanced::SimpleCaptureBalanced(std::shared_ptr<Camera> camera)
: SimpleCapture(camera)
{
}
Results::Result SimpleCaptureBalanced::capture(unsigned int numRequests)
{
Results::Result ret = start();
if (ret.first != Results::Pass)
return ret;
Stream *stream = config_->at(0).stream();
const std::vector<std::unique_ptr<FrameBuffer>> &buffers = allocator_->buffers(stream);
/* No point in testing less requests then the camera depth. */
if (buffers.size() > numRequests) {
/* Cache buffers.size() before we destroy it in stop() */
int buffers_size = buffers.size();
stop();
return { Results::Skip, "Camera needs " + std::to_string(buffers_size)
+ " requests, can't test only " + std::to_string(numRequests) };
}
queueCount_ = 0;
captureCount_ = 0;
captureLimit_ = numRequests;
/* Queue the recommended number of reqeuests. */
std::vector<std::unique_ptr<libcamera::Request>> requests;
for (const std::unique_ptr<FrameBuffer> &buffer : buffers) {
std::unique_ptr<Request> request = camera_->createRequest();
if (!request) {
stop();
return { Results::Fail, "Can't create request" };
}
if (request->addBuffer(stream, buffer.get())) {
stop();
return { Results::Fail, "Can't set buffer for request" };
}
if (queueRequest(request.get()) < 0) {
stop();
return { Results::Fail, "Failed to queue request" };
}
requests.push_back(std::move(request));
}
/* Run capture session. */
loop_ = new EventLoop();
loop_->exec();
stop();
delete loop_;
if (captureCount_ != captureLimit_)
return { Results::Fail, "Got " + std::to_string(captureCount_) +
" request, wanted " + std::to_string(captureLimit_) };
return { Results::Pass, "Balanced capture of " +
std::to_string(numRequests) + " requests" };
}
int SimpleCaptureBalanced::queueRequest(Request *request)
{
queueCount_++;
if (queueCount_ > captureLimit_)
return 0;
return camera_->queueRequest(request);
}
void SimpleCaptureBalanced::requestComplete(Request *request)
{
captureCount_++;
if (captureCount_ >= captureLimit_) {
loop_->exit(0);
return;
}
request->reuse(Request::ReuseBuffers);
if (queueRequest(request))
loop_->exit(-EINVAL);
}
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